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مشخصات مقاله
ترجمه عنوان مقاله حذف فلزات سنگین از فاضلاب با استفاده از فرآیند نفوذ-تراوش و جذب بر روی کربن فعال
عنوان انگلیسی مقاله Removal of heavy metals from wastewater using infiltration-percolation process and adsorption on activated carbon
انتشار مقاله سال ۲۰۱۸
تعداد صفحات مقاله انگلیسی ۱۰ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه اسپرینگر
نوع نگارش مقاله
مقاله پژوهشی (Research article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) scopus – master journals – JCR – ISC
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF)
۲٫۰۳۷ در سال ۲۰۱۷
شاخص H_index ۵۶ در سال ۲۰۱۸
شاخص SJR ۰٫۶ در سال ۲۰۱۸
رشته های مرتبط شیمی، محیط زیست
گرایش های مرتبط شیمی تجزیه، شیمی محیط زیست، آب و فاضلاب
نوع ارائه مقاله
ژورنال
مجله / کنفرانس مجله بین المللی علوم و فن آوری محیط زیست – International Journal of Environmental Science and Technology
دانشگاه Higher Institute of Sciences and Techniques of Waters – University of Gabès – Tunisia
کلمات کلیدی جذب، کربن فعال، اتصال، فلزات سنگین، نفوذ-تراوش
کلمات کلیدی انگلیسی Adsorption, Activated carbon, Coupling, Heavy metals, Infltration-percolation
شناسه دیجیتال – doi
https://doi.org/10.1007/s13762-018-1663-5
کد محصول E9471
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Abstract
Introduction
Materials and methods
Results and discussion
Study of the efciency of the coupling of infltration‑percolation and adsorption on PAC in the treatment of urban wastewater
Simulation of adsorption equilibrium
Conclusion
References

 

بخشی از متن مقاله:
Abstract

Heavy metal pollution has become one of the most serious environmental problems nowadays. The removal of heavy metals from wastewaters has attracted a considerable attention because of their adverse efects on public health and ecosystems. The main objective of this work was to investigate the efciency of the coupling of infltration-percolation process with adsorption on activated carbon in the removal of heavy metals contained in urban wastewater efuents. The adsorption of heavy metals on a commercial sample of activated carbon was studied in a static mode. Several laboratory experiments made it possible to distinguish the optimum quantity of powdered activated carbon necessary to remove a large range of heavy metals. Results showed that the equilibrium of the adsorption was reached very quickly for cadmium (Cd2+), i.e., after 15 min of contact with the activated carbon. On the other hand, the equilibrium of zinc (Zn2+), lead (Pb2+) and copper (Cu2+) was achieved after 45 min. The withdrawal rates were 70.77% for Zn2+, 64.75% for Pb2+, 67.07% for Cu2+ and 78.42% for Cd2+. The adsorption isotherms determined for Zn2+, Pb2+, Cu2+ were of type I, while the shape of the Cd2+ curve showed a type II isotherm. These isotherms confrm the capacity of the powdered activated carbon to adsorb cadmium better than the other studied heavy metals.

Introduction

Heavy metals are dangerous species which induce various environmental and health problems (Göde et al. 2017). Most industries unload wastewater and efuent containing toxic materials, mainly heavy metals, into aquatic systems without treatment, which is a major environmental problem. The excessive release of these pollutants presents a particular problem because they are not biodegradable (Boussahel 2001). These pollutants do not all have the same risks to the environment (Houas et al. 1999) and to health because of their diferent physicochemical properties. Efuents are still treated at wastewater treatment plants (WWTPs), apart from exceptional cases of storm spills, and thus the future of the toxic pollutants contained in wastewater will very much depend on the purifcation efciency of these stations (Varrault 2011). This author has shown that during the treatment, a small quantity of metallic trace elements is not eradicated and will, therefore, pass into the aquatic environment. Furthermore, the uppermost proportion of metals is trapped in the sewage sludge and can, therefore, be transferred either to unloading stations or to agriculture which receives this type of sludge. Heavy metals can reach concentrations that threaten the survival of certain populations and pose dangers. Indeed, heavy metals in water are absorbed by plants and animals. When the amount of these elements exceeds the norms, they can accumulate in the organisms of the food chain (Lacoue-Labarthe 2007). There are several methods for heavy metal detection including inductively coupled plasma-mass spectrometry (Liao and Jiang 1999), spectrophotometry (Jankiewicz et al. 2000), fame-atomic absorption spectrometry (Bortoleto et al. 2004) or electrochemical methods that include ion-selective electrodes, polarography and other modifed electrodes (Yola et al. 2012; Gupta et al. 2013a, b; Yola et al. 2014; Göde et al. 2017).

نوشته مقاله انگلیسی رایگان در مورد حذف فلزات سنگین از فاضلاب – اسپرینگر ۲۰۱۸ اولین بار در سایت آی اس آی دانلود ISIDL. پدیدار شد.


 

مشخصات مقاله
ترجمه عنوان مقاله حذف فلزات سنگین از فاضلاب اکسیداسیون آندی آلومینیومی توسط فیلتر کردن غشاء
عنوان انگلیسی مقاله Removal of heavy metals from aluminum anodic oxidation wastewaters by membrane filtration
انتشار مقاله سال ۲۰۱۸
تعداد صفحات مقاله انگلیسی ۱۴ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه اسپرینگر
نوع نگارش مقاله
مقاله پژوهشی (Research article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) scopus – master journals – JCR – MedLine
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF)
۲٫۸۰۰ در سال ۲۰۱۷
شاخص H_index ۷۴ در سال ۲۰۱۸
شاخص SJR ۰٫۸۵۸ در سال ۲۰۱۸
رشته های مرتبط شیمی، محیط زیست
گرایش های مرتبط شیمی تجزیه، شیمی محیط زیست، آب و فاضلاب
نوع ارائه مقاله
ژورنال
مجله / کنفرانس علوم محیط زیست و تحقیقات آلودگی – Environmental Science and Pollution Research
دانشگاه Environmental Engineering Department – Erciyes University – Turkey
کلمات کلیدی آلومینیوم، اکسیداسیون آندی، فلزات سنگین، فراپالایش، نانوفیلتراسیون، اسمز معکوس، استفاده مجدد از آب
کلمات کلیدی انگلیسی Aluminum, Anodic oxidation, Heavy metal, Ultrafiltration, Nanofiltration, Reverse osmosis, Water reuse
شناسه دیجیتال – doi
https://doi.org/10.1007/s11356-018-2345-z
کد محصول E9472
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Abstract
Introduction
Materials and methods
Experimental procedures
Results and discussion
Conclusion
References

 

بخشی از متن مقاله:
Abstract

Aluminum manufacturing has been reported as one of the largest industries and wastewater produced from the aluminum industry may cause significant environmental problems due to variable pH, high heavy metal concentration, conductivity, and organic load. The management of this wastewater with a high pollution load is of great importance for practitioners in the aluminum sector. There are hardly any studies available on membrane treatment of wastewater originated from anodic oxidation. The aim of this study is to evaluate the best treatment and reuse alternative for aluminum industry wastewater using membrane filtration. Additionally, the performance of chemical precipitation, which is the existing treatment used in the aluminum facility, was also compared with membrane filtration. Wastewater originated from anodic oxidation coating process of an aluminum profile manufacturing facility in Kayseri (Turkey) was used in the experiments. The characterization of raw wastewater was in very low pH (e.g., 3) with high aluminum concentration and conductivity values. Membrane experiments were carried out with ultrafiltration (PTUF), nanofiltration (NF270), and reverse osmosis (SW30) membranes with MWCO 5000, 200–۴۰۰, and 100 Da, respectively. For the chemical precipitation experiments, FeCl3 and FeSO4 chemicals presented lower removal performances for aluminum and chromium, which were below 35% at ambient wastewater pH ~ 3. The membrane filtration experimental results show that, both NF and RO membranes tested could effectively remove aluminum, total chromium and nickel (>90%) from the aluminum production wastewater. The RO (SW30) membrane showed a slightly higher performance at 20 bar operating pressure in terms of conductivity removal values (90%) than the NF 270 membrane (87%). Although similar removal performances were observed for heavy metals and conductivity by NF270 and SW30, significantly higher fluxes were obtained in NF270 membrane filtration at any pressure that there were more than three times the flux values in SW30 membrane filtration. Due to the lower heavy metal (<65%) and conductivity (<30%) removal performances of UF membrane, it could be evaluated as pretreatment followed by NF filtration to protect and extend NF membrane life. The water treated by both NF and RO could be recycled back into the process to be reused with economic and environmental benefits.

Introduction

The aluminum industry contributes to the global economy and to the individual national economies of more than 30 countries. Primary aluminum production, the second most used metal in the world, has been recorded as 51 million tonnes (Das and Yin 2007; IAI 2013). Aluminum is used for varied applications in the construction industry, in transport, in electrical engineering, in packing, and in all kinds of equipment. Among them, production of fencing construction such as windows, doors, and wall and roof profile systems are common usages (Sergey 2011). Finished aluminum is produced by extrusion of the ingots and then the extruded pieces are anodized or covered (Dufour et al. 2001). The aluminum surface is converted to aluminum oxide in the anodizing process. Anodic coatings are impregnated with organic and inorganic dyes and pigments (Lyle et al. 2000) and sulfuric acid solutions are widely employed as electrolytes in anodizing (Sakon et al. 2005; Sanders 2012). The conventional anodizing process has environmental problems that producing huge amounts of wastewater with toxic reagents, heavy metals, and wide variation in pH (Sakon et al. 2005). Wastewater is one of the main issues for the aluminum industry because of significant environmental concerns and public health problems, since they usually contain a notable amount of heavy metals and even toxic elements with relatively high solubility (Agrawal and Sahu 2009). Heavy metals released into the environment bioaccumulate in living organisms and have a serious impact even in trace quantities (Lin et al. 2005; Murthy and Chaudhari 2008).

نوشته مقاله انگلیسی رایگان در مورد حذف فلزات سنگین از فاضلاب اکسیداسیون آندی – اسپرینگر ۲۰۱۸ اولین بار در سایت آی اس آی دانلود ISIDL. پدیدار شد.


 

مشخصات مقاله
ترجمه عنوان مقاله اتفاقاتی که در پاریس می افتد؛ Airbnb، هتل ها، بازار پاریس: یک مورد مطالعه ای
عنوان انگلیسی مقاله What is happening in Paris? Airbnb, hotels, and the Parisian market: A case study
انتشار مقاله سال ۲۰۱۹
تعداد صفحات مقاله انگلیسی ۱۱ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله Short communication
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) scopus – master journals – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF) ۵٫۹۲۱ در سال ۲۰۱۷
شاخص H_index ۱۴۳ در سال ۲۰۱۹
شاخص SJR ۳٫۰۲۷ در سال ۲۰۱۹
رشته های مرتبط گردشگری و توریسم
گرایش های مرتبط مدیریت گردشگری
نوع ارائه مقاله ژورنال
مجله / کنفرانس مدیریت گردشگری – Tourism Management
دانشگاه HES-SO/University of Applied Sciences Western Switzerland – Switzerland
کلمات کلیدی به اشتراک گذاری اقتصاد، به اشتراک گذاری P2P، مصرف مشارکتی، Airbnb، اجاره مسکن P2P، پاریس
کلمات کلیدی انگلیسی Sharing economy, P2P sharing, Collaborative consumption, Airbnb, P2P accommodation rental, Paris
شناسه دیجیتال – doi
https://doi.org/10.1016/j.tourman.2018.04.003
کد محصول E9409
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Abstract
۱ Introduction
۲ Previous literature
۳ The Parisian market
۴ Data and methodology
۵ Research findings
۶ Discussion
References

بخشی از متن مقاله:
ABSTRACT

Airbnb has been the subject of heated discussions among tourism and hospitality scholars. In order to understand the true impact of P2Psharing on the tourism and hospitality landscape, it is important to understand that market in detail first. Therefore, in this paper, we explore the development of the Airbnb market over the last seven years in Paris, the most popular destination for Airbnb guests with more than 40,000 accommodation rentals. This research note is a summary of our findings on the Paris market. Our study shows different growth and seasonality patterns for Airbnb and hotels and dissimilarities in the geographical location of the offers. The findings indicate that the two products are not in direct competition and that their relationship might be more complex than previously thought. We trust that exploring the nature of the competitive relationship would be a valuable avenue for further investigation.

Introduction

Airbnb has been the subject of numerous and often heated discussions among hoteliers and academics in the industry. The original “Airbed and Breakfast” offer of two students in San Francisco, abbreviated AirBnb since, is a platform that allows people to look for, rent and/or list properties for accommodation. While official revenues have not been disclosed, Fortune magazine reports that Airbnb’s annual revenues are expected to reach $10 billion by 2020. Despite this meteoric growth, major hotel chains have yet to show substantial action to withstand the potential competition from the sharing economy. Steve Joyce, the chief executive of Choice Hotels International, mentioned that his brands had not seen any effect from Airbnb. Equally, Kerry Ranson, chairman of the InterContinental Hotels Group Owners Association, said that he did not see Airbnb as a threat or a competitor (Weed, 2015). Hilton CEO Chris Nassetta expressed a similar view, saying that Airbnb was not a major threat to his company’s business and the effect of Airbnb is heterogeneous across hotel markets (Bryan, 2015). However, HVS analysts reported that the overall impact of Airbnb’s operations in New York City is estimated to be $2.1 billion over the twelve-month period from September 2014 through August 2015. Further, the report concluded that Airbnb has eliminated more than 2800 jobs and resulted in more than $226 million annually in lost tax revenues for local, state, and federal governments. And recent research appears to substantiate these findings. Zervas, Proservio, and Byers (2017) measured that a 1% increase in Airbnb listings causes a 0.05% decrease in hotel revenues in the U.S. state of Texas. But according to STR research, Airbnb did not have a measurable effect on hotel demand in Manhattan. Similarly, analysts at Deutsche Bank noted that in many major cities, hotel revenue per available room was maintained while the supply of rooms including Airbnb listings has increased significantly (Bryan, 2015). Their view is that Airbnb is not a risk for hotels. To the contrary, they see such businesses growing the market by creating new demand. These analysts draw the parallel between the sharing economy in the hotel industry and the low-cost airlines in the air transportation sector. Low-cost airlines such as EasyJet or Ryanair expanded the travel market and provided opportunities for those who would otherwise not have been able to travel, or would have travelled less frequently otherwise. In line with this viewpoint, Airbnb claims that its offer has had positive economic impact. In France, for instance its executives report that its visitors contribute significantly to France’s tourism industry, local businesses and local households (Airbnb, 2015). According to an Airbnb report, the company has contributed to the increase in tourism in France. Indeed, they report that 23% of Airbnb guests said they would not have gone on their trip or would not have stayed as long without Airbnb. Also, 66% of Airbnb guests said they would not have stayed in a hotel even if Airbnb had not been an option.

نوشته مقاله انگلیسی رایگان در مورد اتفاقات پاریس؛ Airbnb، هتل ها، بازار پاریس – الزویر ۲۰۱۹ اولین بار در سایت آی اس آی دانلود ISIDL. پدیدار شد.


 

مشخصات مقاله
ترجمه عنوان مقاله یک یادداشت تحقیقاتی کاوشگرانه درباره مصرف اجتماعی آشکار در توریسم
عنوان انگلیسی مقاله A research note exploring socially visible consumption in tourism
انتشار مقاله سال ۲۰۱۹
تعداد صفحات مقاله انگلیسی ۳ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله Short communication – مقاله آماری
مقاله بیس این مقاله بیس میباشد
نمایه (index) scopus – master journals – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF) ۵٫۹۲۱ در سال ۲۰۱۷
شاخص H_index ۱۴۳ در سال ۲۰۱۹
شاخص SJR ۳٫۰۲۷ در سال ۲۰۱۹
رشته های مرتبط گردشگری و توریسم
گرایش های مرتبط مدیریت گردشگری
نوع ارائه مقاله ژورنال
مجله / کنفرانس مدیریت گردشگری – Tourism Management
دانشگاه Head of the Digital Marketing Specialization – Sapir Academic College – Israel
کلمات کلیدی مصرف قابل ملاحظه اجتماعی، خصومت مصرف کننده، ترکیه، فرهنگ
کلمات کلیدی انگلیسی Socially-visible consumption, Consumer animosity, Turkey, Culture
شناسه دیجیتال – doi
https://doi.org/10.1016/j.tourman.2018.07.012
کد محصول E9410
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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سفارش ترجمه این مقاله سفارش ترجمه این مقاله

 

فهرست مطالب مقاله:
Abstract
۱ Introduction
۲ Methodology
۳ Results
۴ Conclusions and implications
References

بخشی از متن مقاله:
ABSTRACT

The present study was conducted in the context of the political tensions between Turkey and Israel. The main objective of the present research note is to examine the relationship between consumer animosity and sociallyvisible consumption; although two salient constructs in the consumer behaviour stream of research, the relationship between them has not been examined in previous research. The mall-intercept method was employed to collect data from a sample of 208 respondents. SPSS’s AMOS software was employed to test the construct validity of the scale items. Pearson correlations and independent sample T-tests were conducted to explore the relationships between the study variables. Results suggest that the relationships between socially visible consumption and consumer animosity is moderated by travellers’ willingness to holiday in a socially visible fashion. Future research should focus on other potential moderators of the relationship between animosity and tourism behaviour such as risk perception.

Introduction

A growing number of studies have explored the effects of consumer animosity on tourism behaviour (Chen, Lin, & Petrick, 2013, 2016; Stepchenkova, Shichkova, Kim, & Rykhtik, 2017, 2018). Klein, Ettenson, and Morris (1998) pioneered the study of consumer animosity with the introduction of the Animosity Model of Foreign Product Purchase; furthermore, Klein et al. (1998) defined animosity as “anger related to previous or ongoing political, military, economic, or diplomatic events” (p. 90). While the overwhelming majority of research investigating consumer animosity has focused on the effects of animosity on physical products (Heinberg, 2017), relatively few studies in the field of tourism management have examined the effect of animosity on destination choice (Sánchez, Campo, & Alvarez, 2018). Exploring the possible impact of animosity and destination choice is especially pertinent as tourism plays a pivotal role in international reconciliation (Farmaki, 2017). The current study was conducted in the context of the political tensions between Turkey and Israel. The number of Israeli travellers choosing Turkey as a holiday destination significantly dropped following the 2010 MV Mavi Marmara incident. In the aftermath of the incident, the number of Israelis travelling to Turkey decreased from 650,000 to 100,000 (Fisher, 2015). The present research note attempts to contribute to the tourism literature by examining the relationships between the critical variables of conceptualizing tourist behaviour: Consumer animosity, susceptibility to visible consumption, susceptibility to norm influence, willingness to learn about the local culture, and willingness to visit a holiday destination. This research note also aims to make practical contributions to the field of tourism by deriving implications critical to the business aspect of tourism marketing. Previous research demonstrates the importance of learning about the local culture during the tourism experience (Poria, Butler, & Airey, 2003). Since animosity is characterized by a hostile attitude aimed at national out-groups (Jung, Ang, Leong, Tan, & Pompitakpan, 2002), we argue that consumer animosity is not only likely to be associated with a lowered willingness to visit a targeted holiday destination but also a lowered willingness to learn about the Turkish culture. Socially visible consumption (henceforth referred to as SVC) refers to consumption in public; that is, consumption observable to others (Josiassen & Assaf, 2013). Although very few past studies focused on the role of SVC in the context of tourist behaviour, they suggest that consumer animosity is negatively associated with SVC (Josiassen & Assaf, 2013). Thus, we argue that animosity will deter Israeli tourists from posting photos on social platforms during their visit and sharing their experience with friends upon their return to Israel. Since “publicly self-conscious individuals are motivated to observe, note, and assimilate in their own SVC the consumption tastes of significant others” (Millan & Mittal, 2017, p. 313), it stands to reason that the more travellers’ are susceptible to norm influence (henceforth referred to as SNI), the less likely they are to consume their holiday to Turkey in a socially visible fashion. As such, we posit the following hypotheses: H1. Animosity will be negatively associated with Israeli travellers’ willingness to visit Turkey. H2. Animosity will be negatively associated with Israeli travellers’ willingness to learn about the Turkish culture. H3. Animosity will be negatively associated with Israeli travellers’ SVC of their holiday in Turkey. H4. Travellers’ willingness to engage in SVC will be negatively associated with their SNI.

نوشته مقاله انگلیسی رایگان در مورد مصرف اجتماعی آشکار در توریسم – الزویر ۲۰۱۹ اولین بار در سایت آی اس آی دانلود ISIDL. پدیدار شد.


 

مشخصات مقاله
ترجمه عنوان مقاله پیش بینی ورود گردشگران با یادگیری ماشین و جست و جوی فهرست اینترنت
عنوان انگلیسی مقاله Forecasting tourist arrivals with machine learning and internet search index
انتشار مقاله سال ۲۰۱۹
تعداد صفحات مقاله انگلیسی ۱۰ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله مقاله پژوهشی (Research article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) scopus – master journals – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF) ۵٫۹۲۱ در سال ۲۰۱۷
شاخص H_index ۱۴۳ در سال ۲۰۱۹
شاخص SJR ۳٫۰۲۷ در سال ۲۰۱۹
رشته های مرتبط گردشگری و توریسم، کامپیوتر، فناوری اطلاعات
گرایش های مرتبط مدیریت گردشگری، هوش مصنوعی، اینترنت و شبکه های گسترده
نوع ارائه مقاله ژورنال
مجله / کنفرانس مدیریت گردشگری – Tourism Management
دانشگاه Academy of Mathematics and Systems Science – Beijing – China
کلمات کلیدی پیش بینی تقاضای گردشگری، یادگیری ماشین حداکثری کرنل، اطلاعات پرس و جو و تحقیقی، تحلیل کلان داده، شاخص جستجوی کامپوزیت
کلمات کلیدی انگلیسی Tourism demand forecasting, Kernel extreme learning machine, Search query data, Big data analytics, Composite search index
شناسه دیجیتال – doi
https://doi.org/10.1016/j.tourman.2018.07.010
کد محصول E9411
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فهرست مطالب مقاله:
Abstract
۱ Introduction
۲ Literature review
۳ Kernel extreme learning machine
۴ Forecasting framework
۵ Experimental study
۶ Conclusions
References

بخشی از متن مقاله:
ABSTRACT

Previous studies have shown that online data, such as search engine queries, is a new source of data that can be used to forecast tourism demand. In this study, we propose a forecasting framework that uses machine learning and internet search indexes to forecast tourist arrivals for popular destinations in China and compared its forecasting performance to the search results generated by Google and Baidu, respectively. This study verifies the Granger causality and co-integration relationship between internet search index and tourist arrivals of Beijing. Our experimental results suggest that compared with benchmark models, the proposed kernel extreme learning machine (KELM) models, which integrate tourist volume series with Baidu Index and Google Index, can improve the forecasting performance significantly in terms of both forecasting accuracy and robustness analysis.

Introduction

All over the world, the tourism industry contributes significantly to economic growth (Gunter & Onder, 2015; Song, Li, Witt, & Athanasopoulos, 2011). According to the China National Tourism Administration, in 2016 the tourism income of China reached 4.69 trillion RMB, increasing by 13.6% compared to the previous year, and accounted for 6.3% of China’s GDP. Thus, forecasting tourist volume is becoming increasingly important for predicting future economic development. Tourism demand forecasting may provide basic information for subsequent planning and policy making (Chu, 2008; Witt & Song, 2002). Methods used in tourism modeling and forecasting fall into four groups: time series models, econometrics models, artificial intelligence techniques and qualitative methods (Goh & Law, 2011; Song & Li, 2008). In addition to simple tourist data announced by the State Statistics Bureau, Internet search queries, which reflect the behavior and intentions of tourists, have increasingly been used in tourism forecasting models (Croce, 2017; Goodwin, 2008). However, the search index has created big opportunities in the modeling process of tourism forecasting (Li, Pan, Raw & Huang, 2017). Internet search data has been applied to many aspects, such as hotel registrations (Pan & Yang, 2017; Rivera, 2016), tourist numbers (Bangwayo-Skeete & Skeete, 2015; Yang, Pan, Evans, & Lv, 2015), economic indicators (Choi & Varian, 2012), unemployment rates (Askitas & Zimmermann, 2009), private consumption (Vosen & Schmidt, 2011), and stock returns (Zhu & Bao, 2014). When introducing the Baidu Index or Google Index into forecasting models, keywords and the composition of indexes must be selected carefully. Keywords can be selected according to the correlation coefficient, the tendency chart or the crowd-squared method (Brynjolfsson, Geva, & Reichman, 2016). Additionally, the composition of indexes can be achieved by the HE-TDC method (Peng, Liu, Wang, & Gu, 2017) or the principal component analysis (PCA). Obviously, efforts should be made to avoid problems related to multi-collinearity and over-fitting to the greatest extent possible. In this study, we proposed a new framework integrating machine learning and Internet search index to forecast tourist volume. The forecasting power of the framework is attributable to two features: first, relevant Internet search queries greatly contribute to the goodness of fit; second, Kernel-based extreme learning machines have short computing time and good generalization ability. However, as far as we know, few studies have adopted extreme learning machine to forecast tourism demand. The proposed framework is utilized to forecasting Beijing tourist arrivals. Relevant Internet search keywords cover the various aspects of tourism including dining, lodging, recreation, shopping, tour and traffic. Different from previous studies, this paper considers both Baidu Index and Google Index, which reflect the current situation of domestic tourists and foreign travelers.

نوشته مقاله انگلیسی رایگان در مورد پیش بینی ورود گردشگران با یادگیری ماشین – الزویر ۲۰۱۹ اولین بار در سایت آی اس آی دانلود ISIDL. پدیدار شد.


 

مشخصات مقاله
ترجمه عنوان مقاله صادرات تعهد شرکت توسط انجمن بازرگانی: دیدگاه هایی از شیلی
عنوان انگلیسی مقاله Exporting firm’s engagement with trade associations: Insights from Chile
انتشار مقاله سال ۲۰۱۹
تعداد صفحات مقاله انگلیسی ۱۱ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله مقاله پژوهشی (Research article)
مقاله بیس این مقاله بیس میباشد
نمایه (index) scopus – master journals – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF) ۲٫۷۵۴ در سال ۲۰۱۷
شاخص H_index ۷۳ در سال ۲۰۱۸
شاخص SJR ۱٫۰۱۲ در سال ۲۰۱۸
رشته های مرتبط مدیریت
گرایش های مرتبط مدیریت بازرگانی، مدیریت بازاریابی و صادرات، مدیریت کسب و کار
نوع ارائه مقاله ژورنال
مجله / کنفرانس بررسی کسب و کار بین المللی – International Business Review
دانشگاه Universidad Andres Bello – Chile
کلمات کلیدی انجمن های بازرگانی، شبکه ها، عدم اطمینان محیطی، عملکرد صادرات، آمریکای جنوبی، اقتصادهای نوظهور، شیلی
کلمات کلیدی انگلیسی Trade associations, Networks, Environmental uncertainty, Export performance, South America, Emerging economies, Chile
شناسه دیجیتال – doi
https://doi.org/10.1016/j.ibusrev.2018.07.001
کد محصول E9413
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Abstract
۱ Introduction
۲ Networks, trade associations and firm’s export performance
۳ Methodology
۴ Results
۵ Discussion
۶ Conclusion, limitations and implications
References

بخشی از متن مقاله:
ABSTRACT

This study addresses the effects of the firm’s level of engagement with trade associations located at the company’s export market on export performance. It analyzes firm-level data from a South American emerging economy, Chile. Results show that a stronger engagement with trade associations located at the company’s export market has a positive effect on export performance. Environmental uncertainty on customer needs is confirmed as an export performance barrier, but unexpectedly, this obstacle only diminishes in a negligible factor as the level of engagement with trade associations located at the firm’s export market increases. This study contributes to the international management literature by investigating the direct and moderating effects of overseas trade associations on the firm’s export performance, and by scrutinizing on the distinctions among the cooperation determinants of local networks and networks situated at the firm’s export market. Practical implications are discussed.

Introduction

Export performance of small and medium sized firms (SMEs’) remain a relevant research area in a global environment with increasing technological change, lower trade barriers and a growing interest in country and firm-level export developing strategies (Ngo, Janssen, Leonidou, & Christodoulides, 2016; Cieślik, Kaciak, & Thongpapanl, 2015), despite the fact of emerging new global trends on de-globalization (Ghemawat, 2017). The understanding and modeling of export performance is typically grounded on the Resource Based View (RBV). The resource-based theory posits that firm´s internal tangible and intangible resources result in competitive advantage and export performance (Barney, 1991; Zou & Stan, 1998). On the contrary, the contingency approach suggests that the interdependence of firm external and internal factors determines firm´s export performance (Cavusgil & Zou, 1994; Yeoh & Jeong, 1995; Sousa, Martínez-López, & Coelho, 2008). This study approaches export performance from the contingency perspective. Institutional networks need more attention in the study of export performance, especially within SMEs (Chetty & Agndal, 2007). At the same time, external networks and horizontal relationships, such as engaging with trade associations are factors that require further study (Boehe, 2013; Guimón & Paraskevopoulou, 2017). This is because external networks may facilitate access to resources that are essential for internationalization. These resources might include, for instance, information benefits or access to pooled resources oriented at international operations (Lavie, 2006; Yiu, Lau, & Bruton, 2007), as well as collective action in the creation of crucial public goods (Porter, 1998). In addition, the peculiar conditions on the export market environment are also relevant factors impacting the firm´s export performance within the contingency approach. These circumstances include the management´s perceived environmental uncertainty on customer´s needs (Lee, Yeung, & Cheng, 2009; Phua, 2007). Nevertheless, very few studies that surpass national borders have addressed the relationship between environmental uncertainty on customer needs and inter-organizational collaborations (Matanda & Freeman, 2009). The evidence on the effect of such relationships is scarce when emerging markets are the context of study. In particular, Kiss, Danis, and Cavusgil (2012), emphasize the necessity to comprehend the connection between firms and international networks in the context of emerging economies. For emerging markets, the predominance of networks is a mechanism to replace formal institutions, which are declining when the latter are strengthened and improved. They ask for a deeper understanding on how firms manage the complexity of resource acquisition while engaging with international networks (Kiss & Danis, 2008; Kiss et al., 2012).

نوشته مقاله انگلیسی رایگان در مورد صادرات تعهد شرکت توسط انجمن بازرگانی – الزویر ۲۰۱۹ اولین بار در سایت آی اس آی دانلود ISIDL. پدیدار شد.


 

مشخصات مقاله
ترجمه عنوان مقاله یک معماری رباتیک موبایلی واحدی برای شناسایی نواقص و تعمیر در تونل های باریک اجزای مکانیک پرواز CFRP
عنوان انگلیسی مقاله A modular mobile robotic architecture for defects detection and repair in narrow tunnels of CFRP aeronautic components
انتشار مقاله سال ۲۰۱۹
تعداد صفحات مقاله انگلیسی ۲۰ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله مقاله پژوهشی (Research article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) scopus – master journals – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF) ۳٫۴۶۴ در سال ۲۰۱۷
شاخص H_index ۷۲ در سال ۲۰۱۹
شاخص SJR ۱٫۰۴۱ در سال ۲۰۱۹
رشته های مرتبط مهندسی کامپیوتر، مهندسی برق
گرایش های مرتبط رباتیک، هوش ماشین و رباتیک
نوع ارائه مقاله ژورنال
مجله / کنفرانس رباتیک و ساخت یکپارچه کامپیوتر – Robotics and Computer Integrated Manufacturing
دانشگاه Institute of Industrial Technologies and Automation – National Research Council of Italy – Italy
کلمات کلیدی روباتیک موبایل، ساخت، کامپوزیت، تعمیر، CFRP
کلمات کلیدی انگلیسی Mobile robotics, Manufacturing, Composite, Repair, CFRP
شناسه دیجیتال – doi
https://doi.org/10.1016/j.rcim.2018.07.011
کد محصول E9432
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Abstract
۱ Introduction
۲ Defect detection and repair process on CFRP structures
۳ Robot requirements
۴ Concept and design
۵ Kinematic analysis
۶ Control strategy
۷ Discussion
۸ Conclusions
References

بخشی از متن مقاله:
ABSTRACT

Advanced composite structural components in aeronautics are characterized by very high production costs because of their dimensions, complex shapes and expensive forming equipment. For these components, such as horizontal stabilizers and wings, a defect occurrence is often critical because large part of inner surfaces, made of long and tapered narrow tunnels, are not reachable for repair operations. In these cases, the part is rejected with a relevant economic loss and high production costs. For this reason, aircraft constructors plan huge investments for defects avoidance during the forming processes of CFRP and to develop effective, robust and reliable repair tools and methods. Mobile robotics can play an important role, with specific systems capable of moving into narrow channels of wings structures (i.e. multi spar boxes) and repair it in accordance to technical standards. This paper describes an innovative mobile robot architecture for bonded repair scarfing operations on CFRP components. Targeting and responding to the demanding machining requirements, the functional-oriented design approach clearly highlights the advantages of a modular robotic solution. The mobile robotic architecture can be also applied in other fields with similar challenging manufacturing operations for further inspection, detection and machining operations.

Introduction

Working in narrow space is a typical issue for the repair process of aeronautical structural components. Carbon Fiber Reinforced Plastic (CFRP) components, as wings and horizontal stabilizers, are often realized in the form of multi spar boxes assemblies. A typical example is the Boeing 787 Dreamliner horizontal stabilizer (tailplane) which has a multi-spar boxes structure and its cross-section is composed by a plurality of longitudinal tapered narrow tunnels. During the manufacturing process of these components some defects may occur. In order to reduce the high cost of discards, the necessity for an efficient and robust repair process arises. In literature, different technological processes and techniques for CFRP aircraft structures repair are available [1]. This paper deals with the application of such techniques in narrow spaces, as the multi spar boxes structures. Currently, the CFRP repair techniques are typically performed manually [2] and sometimes the damage is not accessible by the operator. In large CFRP multi-spar boxes structural components, indeed, human operators are able to repair internal damages only if localized in proximity of the wing tip or root. In all the other cases there are no fix strategies currently available and the components, often very expensive, must be discarded [3]. Thus, the position of the damage is crucial, as it causes a large number of discards in aeronautics manufacturing, with consequent increase of the production costs. Due to the lack of solutions of applying fixing techniques in narrow multi spar boxes, in this paper a strategy for the automation of such a process is described. Mobile robotics is identified as the key enabling technology that makes it possible. As a further advantage, some studies, remarked the importance of automated machining of CFRP and the advantages in terms of accuracy, quality and reliability compared with a manual operation [4]. Nevertheless, there are no available solutions for the repair of internal defects. The proposed approaches, indeed, consider either new specific devices to be manually fixed in proximity of the damage [5,6], or the use of conventional robots, too big for this purpose [7]. In [8] a robotic inspection cell is presented, composed of three industrial manipulators performing both, photogrammetry acquisitions and ultrasound-based NDT inspection. The robots can move along linear guides and the inspection of large components is enabled; however, there is no possibility for internal defects detection.

نوشته مقاله انگلیسی رایگان در مورد یک معماری رباتیک موبایلی واحدی در تونل های باریک – الزویر ۲۰۱۹ اولین بار در سایت آی اس آی دانلود ISIDL. پدیدار شد.


 

مشخصات مقاله
ترجمه عنوان مقاله رویارویی با میل به ساده بودن لوگوی برند: تاثیر طرح لوگوی برند بر میزان مصرف
عنوان انگلیسی مقاله Facing a Trend of Brand Logo Simplicity: The Impact of Brand Logo Design on Consumption
انتشار مقاله سال ۲۰۱۹
تعداد صفحات مقاله انگلیسی ۲۹ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله مقاله پژوهشی (Research article)
مقاله بیس این مقاله بیس میباشد
نمایه (index) scopus – master journals – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF) ۳٫۶۵۲ در سال ۲۰۱۷
شاخص H_index ۸۹ در سال ۲۰۱۹
شاخص SJR ۱٫۲۳۷ در سال ۲۰۱۹
رشته های مرتبط مدیریت
گرایش های مرتبط بازاریابی
نوع ارائه مقاله ژورنال
مجله / کنفرانس کیفیت و ترجیحات غذایی – Food Quality and Preference
دانشگاه  Maastricht University – Department of Marketing and Supply Chain Management – Netherlands
کلمات کلیدی آرم برند؛ طراحی ساده؛ مصرف؛ روان بودن پردازش؛ اعتبار؛ مصرف غذا
کلمات کلیدی انگلیسی Brand logo; Simple design; Consumption; Processing fluency; Prestige; Food intake
شناسه دیجیتال – doi
https://doi.org/10.1016/j.foodqual.2018.06.009
کد محصول E9433
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Abstract
۱ Introduction
۲ Theoretical framework and hypotheses
۳ Study 1
۴ Study 2
۵ General discussion
۶ Declarations of interest
References

بخشی از متن مقاله:
Abstract

Research has shown that the experience of fluency influences buying intentions of food products, but no study has examined how brand logos transferring a feeling of fluency might impact actual food intake. In two experiments, we assess how exposure to simple versus complex brand logos impacts food consumption. Study 1 shows that individuals consume more from a product which features a simple, flat logo compared to a product that features a complex, non-flat logo. Study 2 depicts the nature of the product as an important moderator in this effect: while for non-prestigious products simple brand logos increase consumption, the opposite occurs for prestigious food products. Overall, while the tenet of the findings is consistent with earlier work on fluency effects within the food domain, this research provides evidence that brand logo design has the potential to impact actual food intake.

Introduction

Millions of people are struggling with controlling their food consumption (Haws & Redden, 2013) and rising obesity rates suggest that the struggle is real. Indeed, since 1975 the number of overweight and obese people worldwide has nearly tripled, with globally approximately 1.9 billion overweight adults in 2016 (World Health Organization, 2017). One reason why the struggle against obesity is such a difficult one is the fact that unobtrusive factors not openly related to consumption wield an unnoticed influence on consumption patterns. Product design factors such as product size (e.g., Rolls et al., 2004; Coelho Do Vale, Pieters, & Zeelenberg, 2008), product shape (e.g., van Ooijen, Fransen, Verlegh, & Smit, 2016; Huyghe, Geuens, & Vermeir, 2017), and product labels (e.g., Finkelstein & Fishbach, 2010; Mullie, Godderis, & Clarys, 2012; Vadiveloo, Morwitz, & Chandon, 2013) have been repeatedly found to significantly alter food intake. Yet, at the same time, these “hidden” factors also present a way to regulate consumption styles. In fact, micro-changes in the consumer landscape might even present a possible route to a healthy lifestyle. The current research focuses on a prominent product design feature, namely the brand logo design, and it’s potential to influence food intake. Certainly, brand logo design may have multiple downstream effects (e.g., on brand awareness, aided recognition, and buying intention; Chevalier & Mazzalovo, 2003; Henderson & Cote, 1998; Pocheptsova, Labroo, & Dhar 2010), yet the aim of this research is to understand whether the specific design features of a brand logo can influence food intake. Notably, and partly the inspiration of this research, is the trend of brand logo simplification. Numerous major brands including Starbucks, Nesquik, Subway, and Pepsi (cf. Figure 1) have redesigned their logos opting for a more simplistic look. This simplification is a token of flat design, a trend characterized by a focus on simple and minimalistic design (Clum, 2013). This trend is in line with a growing body of scientific literature in the domain of processing fluency, which clearly shows that a fluent processing of stimuli leads to more positive evaluations (Reber, Schwarz, & Winkielman, 2004; Schwarz, 2004; Winkielman, Schwarz, Fazendeiro, & Reber, 2003; Zajonc, 1968). Logos, just like any other stimuli, can contribute to a feeling of overall processing fluency which signals the “[…] subjective experience of ease with which people process information […]” (Alter and Oppenheimer, 2009, p. 219). As such, products featuring flat design are expected to positively influence the attitudes of consumers.

نوشته مقاله انگلیسی رایگان در مورد رویارویی با میل به ساده بودن لوگوی برند – الزویر ۲۰۱۹ اولین بار در سایت آی اس آی دانلود ISIDL. پدیدار شد.


 

مشخصات مقاله
ترجمه عنوان مقاله برند ایالات متحده آمریکا: یک شبه آزمایش طبیعی برای ارزیابی میزان موفقیت کمپین های بازاریابی ملی
عنوان انگلیسی مقاله Brand USA: A natural quasi-experiment evaluating the success of a national marketing campaign
انتشار مقاله سال ۲۰۱۹
تعداد صفحات مقاله انگلیسی ۷ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله مقاله پژوهشی (Research article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) scopus – master journals – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF) ۵٫۹۲۱ در سال ۲۰۱۷
شاخص H_index ۱۴۳ در سال ۲۰۱۹
شاخص SJR ۳٫۰۲۷ در سال ۲۰۱۹
رشته های مرتبط مدیریت
گرایش های مرتبط بازاریابی
نوع ارائه مقاله ژورنال
مجله / کنفرانس مدیریت گردشگری – Tourism Management
دانشگاه University of Central Florida – Scorpius Street – Room – USA
کلمات کلیدی برندسازی ملی، مشارکت خصوصی دولتی، ارزیابی برنامه، بازار یابی
کلمات کلیدی انگلیسی Nation branding, Public private partnership, Program evaluation, Marketing
شناسه دیجیتال – doi
https://doi.org/10.1016/j.tourman.2018.07.013
کد محصول E9434
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Abstract
۱ Introduction
۲ Literature review: an overview of nation branding and marketing
۳ Data and methods
۴ Findings: brand USA’s questionable results
۵ Conclusion and discussion
References

بخشی از متن مقاله:
ABSTRACT

As national, state, and local governments implement strategic place branding and marketing plans, questions remain about how to best measure the success of such endeavors. Using a natural quasi-experimental design, we evaluate how well marketing efforts from Brand USA achieve intended tourism goals. Brand USA was created in 2009 to market the country abroad. Based on air travel data collected from the National Travel and Tourism Office, Brand USA reports, and economic indicators from the World Bank, we find Brand USA’s marketing efforts have little effect on inbound international travel to the US, thus showing a potential weakness in place marketing efforts abroad. Findings suggest the organization may decrease the effectiveness of the complex branding campaign.

Introduction

Popular news outlets have covered President Trump and his effect on travel to the United States. Recently, news of the US Supreme Court upholding Trump’s travel ban caused a spokesperson for Brand USA, the government’s destination marketing agency, to reaffirm the role of destination marketing and implore people to transcend political rhetoric and visit the US (Leposa, 2018). What some are calling the “Trump slump” has cost the US travel and tourism industry an estimated $4.6 billion and 40,000 jobs (US Travel Association, 2018). Perhaps signaling Brand USA as extraneous government spending, the Trump administration threatened to revoke funding for the agency in its fiscal year 2018 budget request (Gingerish, 2018). Together these events beg the question: How well do Brand USA’s destination branding and marketing efforts work? Brand America is one of the strongest nation brands in the world (Anholt & Hildreth, 2010), so it might seem unusual for the country to have its own marketing and branding agency. In this case, Brand USA serves that role as a federally funded public-private partnership (PPP) established in the 2009 Travel Promotion Act. Brand USA’s goal is to develop and communicate the US brand to targeted countries globally to increase leisure travel to the United States. Given that federal dollars fund these efforts, understanding the performance of Brand USA’s international communications efforts via country-specific targeted marketing strategies becomes prudent. While Brand USA leaders and spokespeople continue to praise the efforts of the organization, we evaluate if Brand USA’s international branding marketing efforts indeed help increase US tourism. The question addresses a gap in the place branding and marketing literature about measuring success of such programs (Zenker & Marin, 2011). Given Brand USA targets certain countries and not others, we have a natural quasi-experiment that allows for evaluation of programmatic success. By comparing countries that received the marketing treatment with those that did not, we find that Brand USA may not be successful in its efforts. The organization presents a picture of success to sustain funding given that, when adding social, economic, and other controls for the nations targeted, their marketing efforts abroad do not work well. This finding confirms existing literature that suggests is it difficult to measure place marketing success, as the one-to-one relationship of treatment-effect is elusive at best (Aaker & Joachimstahler, 2009). It is challenging to measure whether someone saw an ad for Brand USA and selected the country for travel or had plans to travel to the US anyway. Therefore, Brand USA’s claims that direct marketing works in this manner is spurious at best. Brand USA, as a PPP, has the incentive to return less revenue to its tourism mission, instead allocating resources to marketing the agency itself to its members and policymakers through glossy annual reports.

نوشته مقاله انگلیسی رایگان در مورد برند ایالات متحده آمریکا: موفقیت کمپین های بازاریابی ملی – الزویر ۲۰۱۹ اولین بار در سایت آی اس آی دانلود ISIDL. پدیدار شد.


 

مشخصات مقاله
ترجمه عنوان مقاله یک مطالعه پارامتری و بهینه سازی دو مبدل انرژی موج حجمی
عنوان انگلیسی مقاله A parameter study and optimization of two body wave energy converters
انتشار مقاله سال ۲۰۱۹
تعداد صفحات مقاله انگلیسی  ۴۷ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله مقاله پژوهشی (Research article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) scopus – master journals – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF) ۴٫۹۰۰ در سال ۲۰۱۷
شاخص H_index ۱۴۳ در سال ۲۰۱۹
شاخص SJR ۱٫۸۴۷ در سال ۲۰۱۹
رشته های مرتبط مهندسی انرژی، مهندسی مکانیک
گرایش های مرتبط انرژی های تجدیدپذیر، تبدیل انرژی
نوع ارائه مقاله ژورنال
مجله / کنفرانس انرژی تجدیدپذیر – Renewable Energy
دانشگاه School of Engineering – RMIT University – Australia
کلمات کلیدی پارامتر، بهینه سازی، دو مبدل انرژی موج بدن، قدرت، پهنای باند، روش تاگوچی
کلمات کلیدی انگلیسی parameter, optimization, two body wave energy converters, power, bandwidth, Taguchi method
شناسه دیجیتال – doi
https://doi.org/10.1016/j.renene.2018.06.117
کد محصول E9435
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Abstract
۱ Introduction
۲ Mathematical model
۳ Parametric study
۴ Discussions
۵ Optimization
۶ Conclusion
References

بخشی از متن مقاله:
Abstract

This paper studies the multidisciplinary nature of two body wave energy converters by a parametric study based on the Taguchi method which helps to understand the effect of different dependent parameters on the wave energy conversion performance. Seven different parameters are analyzed and their effect on the maximum captured power, resonance frequency and bandwidth is studied. An interesting comparison between a cylindrical submerged body and a spherical one was made in terms of the system’s viscous damping and hydrodynamics. The best system parameter combinations based on the maximum output power, best resonant frequency and frequency bandwidth were identified from the outcomes of the Taguchi method and optimized to capture the maximum power to operate in the specific (Australian) sea regions where the waves’ frequencies are relatively low. This paper should provide a guideline for designers to tune their parameters based on the desired performance and sea state.

Introduction

Renewable energy has been established as one of the most prolific development areas in the twenty first century. The difficulties surrounding exploiting renewable energy resources are no longer related to developing novel technologies, but rather related to the transition and implementation of the renewable harvesting systems within the petrol based power grids around the world. Solar energy, hydropower and wind energy are all being harvested by technologies which are witnessing a high rise in usage, and have been well established and optimized within industry manufacturers. Ocean energy conversion technology on the other hand, while it has a potentially higher efficiency and reduced complexity, is struggling to find its place in the renewable energy 36 market. There are three main types of WECs: point absorbers, terminators, and attenuators, and many modes of operation [1]. These devices have undergone much research and development 39 since there were more than 1000 WEC devices in 2009. With such large amount of research and development, one must attribute the difficulties of the wave energy converter development to the multidisciplinary nature of harvesting power from ocean waves. For example, hydropower is highly accounted for fluid and thermo dynamics, this results in a convergence and simplicity of the focus on developing hydropower energy harvesters. On the other hand, as presented in [2], wave energy harvesters are related to many disciplines and factors, as their performance is highly  affected by the PTO (power take-off) system, the hydrodynamic design, and dynamics and control in an attempt to increase the WEC efficiency for different sea states.

نوشته مقاله انگلیسی رایگان در مورد بهینه سازی دو مبدل انرژی موج حجمی – الزویر ۲۰۱۹ اولین بار در سایت آی اس آی دانلود ISIDL. پدیدار شد.

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