Yazd, Iran
Yazd, Iran

Yazd University is an Iranian university in the city of Yazd in Yazd Province.The university was founded in 1987,and has witnessed a period of rapid growth ever since. The university has an area of 380 ha with a total building area of 24 ha. It has 400 faculty members and about 15000 students in 180 different fields in Ph.D. , Masters , and Bachelors levels. Wikipedia.


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Mostafaeipour A.,University of Yazd
Renewable and Sustainable Energy Reviews | Year: 2010

The use of wind energy reduces CO2 emission and increases new employment opportunities. The positive impacts of wind energy on the mitigation of climate change as well as opportunity to diminish energy dependency are indisputable. Wind energy helps decreasing import dependency, diversifying sources of production, and contributes to a sustainable development in many countries. This article explores the importance of global wind turbine development and other relevant issues which are important. In this energy scenario, global installed wind turbines, energy potential and employment issues were discussed. Wind energy deployment creates a significant number of jobs, and does so at a time when other energy sectors are shrinking. Global wind turbine installation for recent years (2006-2008) was thoroughly discussed along with employment issues regarding wind industry in the world. The wind energy sector has grown exponentially since the end of the 1990s, especially within many countries, and this has affected the employment levels of countries involved. © 2009 Elsevier Ltd. All rights reserved.


Mostafaeipour A.,University of Yazd
Renewable and Sustainable Energy Reviews | Year: 2010

This paper analyses the wind speed of some major cities in province of Yazd which is located in central part of Iran. Also, the feasibility study of implementing wind turbines to take advantage of wind power is reviewed and then the subject of wind speed and wind potential at different stations is considered. This paper utilized wind speed data over a period of almost 13 years between 1992 and 2005 from 11 stations, to assess the wind power potential at these sites. In this paper, the hourly measured wind speed data at 10 m, 20 m and 40 m height for Yazd province have been statically analyzed to determine the potential of wind power generation. Extrapolation of the 10 m data, using the Power Law, has been used to determine the wind data at heights of 20 m and 40 m. The results showed that most of the stations have annual average wind speed of less than 4.5 m/s which is considered as unacceptable for installation of the wind turbines. City of Herat has higher wind energy potential with annual wind speed average of 5.05 m/s and 6.86 m/s, respectively, at height of 10 m and 40 m above ground level (AGL). This site is a good candidate for remote area wind energy applications. But some more information is required, because the collected data for Herat is only for 2004. Cities of Aghda with 3.96 m/s, Gariz with 3.95 m/s, and Maybod with 3.83 m/s annual wind speed average at height of 10 m above ground level are also able to harness wind by installing small wind turbines. The Tabas and Bafgh sites wind speed data indicated that the two sites have lower annual wind speed averages between 1.56 m/s and 2.22 m/s at 10 m height. The monthly and annual wind speeds at different heights have been studied to ensure optimum selection of wind turbine installation for different stations in Yazd. © 2009 Elsevier Ltd. All rights reserved.


Latif A.,University of Yazd
Journal of Information Hiding and Multimedia Signal Processing | Year: 2013

In this paper, an adaptive digital image watermarking technique using fuzzy logic and tabu search is presented. In our approach, the image is divided into separate blocks and the parametric slant-Hadamard transform is applied on each block individually. Then, the watermark is inserted in the transform domain and the inverse transform is carried out. The selected transform includes some parameters that can be handled to control the requirements of watermarking such as robustness and imperceptibility. The robustness and imperceptibility are in conict with each other; however, we apply the transform parameters to enhance the robustness by tabu search and after embedding, the watermark is adapted to the image by exploiting the masking characteristics of the human visual system using fuzzy gradient to ensure the imperceptibility. Experimental results show that the proposed technique has high imperceptibility as well as high robustness against variety of attacks. © 2013 ISSN 2073-4212.


Mostafaeipour A.,University of Yazd
Energy Conversion and Management | Year: 2013

Renewable energy sources are expected to have a flourishing future and an important role in many countries as well as Iran. The purpose of this study is to offer economic evaluation of small wind turbine installation for city of Kerman in southeastern part of Iran. A long term data source, consisting of 14 years (1991-2004) of three-hourly mean wind data, was adopted and analyzed. Mean wind power based on measured data and Weibull distribution function as well as the relative percentage error (RPE) between obtained values of wind power based on two methods have been studied. It was found that Weibull distribution was unsuitable for this study. Based on these data, it was found that the numerical values of the shape and scale parameters for Kerman varied over a wide range. Annual values of "k" ranged from 1.266 to 1.473 with a mean value of 1.375, while annual values of "c" were in the range of 2.504-3.478 with a mean value of 3.000 m/s. The annual mean wind speed of the city is obtained as 2.743 m/s at 10 m height. Wind power densities have been estimated and relatively low for large wind turbines. This paper analyses economic evaluation and applications of three small wind turbines. The results show that Kerman has an available wind energy potential in order to install some small wind turbine models for the sustainable development of Kerman. © 2013 Elsevier Ltd. All rights reserved.


Sadegheih A.,University of Yazd
Renewable and Sustainable Energy Reviews | Year: 2011

In this paper, an adaptation of MIP, GA, SA, and TS to network planning under the carbon emission trading program is described and computational results are given. As will be shown, the results are very encouraging. The cost function of this problem consists of the capital investment cost in discrete form, the cost of transmission losses, the power generation costs and carbon emission costs. The optimization model has the ability to minimize the total costs and provides the best solutions, which are both cost-effective and environmentally friendly. This method of solution is demonstrated on the real problem. Finally, the performance of the proposed procedure is compared with that of the most well-known as mixed-integer programming. © 2010 Elsevier Ltd.


Zare Mehrjerdi Y.,University of Yazd
Applied Soft Computing Journal | Year: 2014

In this article, grey based theory is used to grasp the ambiguity exists in the utilized information and the fuzziness appears in the human judgments and preferences. Grey theory can produce satisfactory results, and hence stimulates creativity and the invention for developing new methods and alternative approaches. This article is a very useful source of information for fuzzy grey and decision making using more than one decision makers in fuzzy environment. A case study on system selection comprised of 12 attributes and 7 alternatives is constructed and solved by the proposed method and the results are compared with the results obtained from QSPM, TOPSIS and SAW approaches for analysis purposes. © 2013 Elsevier B.V. All rights reserved.


A hybridized boundary element/power series solution method is proposed for evaluating displacements and stresses near the crack tips. In the indirect boundary element method, the special crack tip elements can be used to increase the accuracy of the stress and displacement fields near the crack ends. The special crack tip elements are usually used by assuming the crack mouth opening and crack mouth displacement variations in form of an infinite power series which can end up with the special singular integrals. The aim of this paper is to solve these singular integrals by using an infinite power series. The power series solution method has been used to solve some example problems in fracture mechanics and the corresponding semi-analytical results are compared with those obtained by using the system of partial differential integral equations. This comparison demonstrates the high accuracy of the proposed method. © 2012 Elsevier Ltd.


Montazeri H.,University of Yazd
Building and Environment | Year: 2011

Wind catcher as a natural ventilation system is increasingly used in modern buildings to minimize the consumption of non-renewable energy and reduce the harmful emissions. Height, cross section of the air passages and also place and the number of openings are the main factors which affect the ventilation performance of a wind catcher structure. In this study, experimental wind tunnel, smoke visualization testing and computational fluid dynamic (CFD) modeling were conducted to investigate ventilation performance of wind catchers with different number of openings to find how the number of opening affects hydrodynamic behavior of wind catchers. To achieve this particular aim, five cylindrical models with same cross section areas and same heights were employed. The cross sections of all these wind catchers were divided internally into various segments to get two-sided, three-sided, four-sided, six-sided and twelve-sided wind catchers. The experimental investigations were conducted in an open circuit subsonic wind tunnel. For all these five shapes, the ventilated air flow rate into the test room was measured at different air incident angles. Numerical solutions were used for all these five configurations to validate the proposed measuring techniques and the corresponding wind tunnel results. The results show that the number of openings is a main factor in performance of wind catcher systems. It also shows that the sensitivity of the performance of different wind catchers related to the wind angle decreases by increasing the number of openings. Moreover, comparing with a circular wind catcher a rectangular system provides a higher efficiency. © 2010 Elsevier Ltd.


Dehghan A.A.,University of Yazd
Renewable and Sustainable Energy Reviews | Year: 2011

The present study attempts to review and discuss the status and potential of Yazd Province in utilizing renewable energy sources with a special focus on solar and wind energies. Solar insulation data reveals that the region has great potentials for harnessing solar energy and implementing the related promising available technologies. The province is experiencing power generation by a 12 kW off grid PV system for electrification of Dorbid village for many years. Besides, the biggest solar energy utilization project in the Middle East, the installation of 467 MW combined gas-steam-solar power plant is dedicated to the power generation of this province. According to the experimental work conducted, it is shown that utilizing other low cost solar technologies such as domestic solar water heaters and solar ponds are also reliable means of serving supplementary thermal energy demand of the region. The local wind data shows that the province can benefit wind energy for running small wind turbines or driving wind pumps for water irrigation purposes. The highly subsidized energy supplied by the government is a major barrier of renewable energy adoption. However, the desubsidazation plan, which is to be implemented to the energy commodities by the Iranian government, will inevitably brings the employment of renewable energy to a closer attention. © 2010 Elsevier Ltd.


Mostafaeipour A.,University of Yazd
Renewable and Sustainable Energy Reviews | Year: 2010

Renewable energies have potential for supplying of relatively clean and mostly local energy. Wind energy generation is expected to increase in the near future and has experienced dramatic growth over the past decade in many countries. Offshore winds are generally stronger and more constant than onshore winds in many areas. The economic feasibility for utilization of offshore wind energy depends on the favorable wind conditions in the area. The present paper analyses offshore wind speed in global scale and also studies feasibility of introducing this technology for harnessing wind in Persian Gulf, Caspian Sea, Urmia Lake and Gulf of Oman. Wind speed data were collected from different sources. The ocean surface winds at a 10 m height from satellite passes as processed by NOAA/NESDIS, from near real-time data collected by NASA/JPL's Sea Winds Scatterometer aboard the QuikSCAT. Development of renewable energy is one of priority research goals in Iran. There are many installed wind turbines in suitable regions like Manjil and Binalood, but there has not been any offshore wind installation yet in Iran. It is suggested that policy makers to invest and pay more attentions toward harnessing renewable energy sources like offshore wind in Persian Gulf and Gulf of Oman in southern parts of Iran. © 2010 Elsevier Ltd. All rights reserved.

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