نتایج جستجو برای: micro model

تعداد نتایج: 2201764  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده علوم پایه 1390

جنس euphrasia l. از گیاهان نیمه انگل و متعلق به تیره scrophulariaceae می باشد که پراکنش جهانی دارد و اغلب در مناطق معتدل دو نیمکره شمالی و جنوبی پراکنده اند. این سرده در ایران دارای 6 گونه ,e. juzepczukii ,e. petiolaris e. salisburgensis ,e. sevanensis ,e. hirtella ,e. pectinata می باشد که عمدتا در شمال کشور پراکندگی دارند. مطالعه حاضر به منظور تمایز این گونه ها با استفاده از صفات ریخت شناسی، ت...

Journal: :JGIM 2014
Jinghua Huang Jing Zhang Yangfan Li Zhepeng Lv

The increasing use of micro-blogging as a marketing tool has increased research attention on usage and business value of enterprise micro-blogging. Based on research on information system (IS) usage and resourcebased view (RBV) theory, this study develops a model to reveal the mechanism of business value creation of enterprise micro-blogging. The model consists of metrics on micro-blogging usag...

2013
Jinghua Huang Jing Zhang Yangfan Li Zhepeng Lv

The increasing use of micro-blogs as marketing tools has increased the research attention on the usage and performance of enterprise micro-blogs. Based on research on information system (IS) usage and the resource-based view (RBV) theory, this study develops a model to measure the business value of enterprise micro-blogs. The model consists of metrics on micro-blog usage, micro-blog operational...

2005
Qiong Yang Dian Gong Xiaoou Tang

Currently, most of the feature extraction methods based on micropatterns are application oriented. The micro-patterns are intuitively userdesigned based on experience. Few works have built models of micro-patterns for feature extraction. In this paper, we propose a model-based feature extraction approach, which uses micro-structure modeling to design adaptive micro-patterns. We first model the ...

2017
Ronald A. Roberts R. A. Roberts

A computational model of ultrasound scattering by micro-cracks in fiber reinforced polymer laminates is presented, foundational to study of micro-crack induced ultrasound attenuation. A model for transmission scattering response is developed using a boundary integral formulation, and associated approximate scattering theories are discussed. Numerical results are presented demonstrating applicat...

2008
Pablo Gomez

This paper reports on the state-of-the-art of technologies for the design and fabrication of MEMS micro-mirrors. We discuss the major design issues, considerations, calculations and restrictions of micro mirrors. The materials employed for the reflective surfaces are described along with their properties. The materials used for the static and dynamic MEMS micro structures as well as the differe...

Water harvesting is the collection of runoff for productivity purposes, instead of runoff being left to cause erosion. In arid and semi-arid drought-prone areas, micro-catchments are widely used as a water harvesting method to improve rangeland condition. The aim of present study was to investigate the effects of micro-catchment on ecological indices of rangeland health in Ghick-Sheikhha, Jirof...

Journal: :journal of computational applied mechanics 0
mahdi moghimi zand assistant professor, school of mechanical engineering, university of tehran, tehran, iran amir ostadi moghaddam department of mechanical engineering, university of tehran, tehran, iran

gyroscopes are used as rotation rate sensors. conventional gyroscopes are heavy and bulky, which creates important problems regarding their usage in different applications. micro-gyroscopes have solved these problems due to their small size. the beam micro-gyroscope is one of the popular types of inertial sensors. their small dimensions and low energy consumption are key reasons for their popul...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه - دانشکده کشاورزی و دامپروری رضاییه 1392

به منظور بررسی تأثیر مواد محرک رشد و نیز روش های مختلف استعمال مواد محرک رشد ارگانیک بر عملکرد و اجزای عملکرد در ذرت سینگل کراس 704، آزمایشی در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه ارومیه به صورت فاکتوریل در قالب طرح بلوک های کامل تصادفی با سه تکرار به اجرا درآمد. مواد محرک رشد در چهار سطح (شاهد، magic crop،aminol_forte و micro rich) به عنوان فاکتور اول و تیمارهای مختلف نحوه استعمال به عنوان ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید