نتایج جستجو برای: WSN

تعداد نتایج: 7715  

Journal: :journal of ai and data mining 2014
seyed mojtaba hosseinirad mehdi niazi j pourdeilami swapan kumar basu ali akbar pouyan

in wireless sensor networks (wsns), localization algorithms could be range-based or range-free. the approximate point in triangle (apit) is a range-free approach. we propose modification of the apit algorithm and refer as modified-apit. we select suitable triangles with appropriate distance between anchors to reduce pit test errors (edge effect and non-uniform placement of neighbours) in apit a...

Journal: :journal of dental research, dental clinics, dental prospects 0
amir ala aghbali firouz pouralibaba hossein eslami farzaneh pakdel zahra jamali

white sponge nevus (wsn) is a rare hereditary dyskeratotic hyperplasia of mucous membranes. it is an autosomal dominant disorder with variable penetrance. we report a case of wsn in a healthy 21-year-old male with no history of familial involvement. a white smooth plaque with no erythema or other structural abnormalities was observed, which confirmed the diagnosis of wsn histopathologically.

2012
Ravi Kant Sahu Abhishek Mohta

In Wireless Sensor Networks, data dissemination to multiple sinks consumes a lot of energy. Various data dissemination schemes have been proposed over the years to reduce the energy consumption in Wireless Sensor Networks. In this paper, we have proposed a virtual infrastructure based data dissemination scheme which reduces the energy consumption in grid construction process. Grid construction ...

Journal: :journal of advances in computer research 0

adequate coverage is one of the main problems for distributed wireless sensor networks and the effectiveness of that highly depends on the sensor deployment scheme. given a finite number of sensors, optimizing the sensor deployment will provide sufficient sensor coverage and save power of sensors for movement to target location to adequate coverage. in this paper, we apply fuzzy logic system to...

2012
Jiun-Jian Liaw Cheng- Wei Chou

Smart environment is widely applied and it is the most important application of wireless sensor networks. Reduction of the energy consumption problem is the key to developing WSN. In the cluster based of energy-efficient method, the fixed cluster head number, the energy of node and the transmission distance are the keys to extending the network lifetime. We propose an improved grouping protocol...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد گرمسار - دانشکده مهندسی کامپیوتر 1393

شبکه های حسگر بی سیم از تعداد زیادی گره های کوچک هوشمند با قابلیتهای سنجش، پردازش وارتباطات تشکیل شده است.گره های حسگر برای بدست آوردن اطلاعات در مورد یک هدف خاص در یک منطقه یا محیط زیست به صورت متراکم مستقر شده اند.کاربردهای فراوان در شبکه های حسگر بی سیم در سالهای اخیر باعث شده است پژوهش های زیادی برای بهبود عملکرد این شبکه ها صورت بگیرد. به طور کلی بخش وسیعی از کاربردهای wsn از باندهای بدون ...

Journal: :journal of advances in computer research 2014
hamid barati mohsen sedighi ali movaghar iman attarzadeh

wireless sensor networks are composed of hundreds or thousands of small nodes called sensor that work together and are associated with a specific task or tasks to do. each of these nodes includes sensor, processor, communication components, a small memory and a source of energy. it is expected that wireless sensor networks will be used widely in many applications in near future. scalability and...

Due to the resource constraint and dynamic parameters, reducing energy consumption became the most important issues of wireless sensor networks topology design. All proposed hierarchy methods cluster a WSN in different cluster layers in one step of evolutionary algorithm usage with complicated parameters which may lead to reducing efficiency and performance. In fact, in WSNs topology, increasin...

The exponential rise in wireless communication demands and allied applications have revitalized academia-industries to develop more efficient routing protocols. Wireless Sensor Network (WSN) being battery operated network, it often undergoes node death-causing pre-ma...

تقاضا برای مصرف محصولات لبنی کم­چرب از جمله پنیرهای کم­چرب به‌طور روزافزون در حال افزایش است. با کاهش چربی، پنیر از لحاظ ویژگی­های فیزیکوشیمیائی و حسی دچار نقصان خواهد شد، ولی با استفاده از جایگزین­های چربی این مشکل تا حدی برطرف می­شود. در این پژوهش مالتودکسترین (16 DE =) به­عنوان جایگزین چربی در پنیر فراپالایشی کم­چرب مورد استفاده قرار گرفت. محلول شیری مالتودکسترین 25% (وزنی/وزنی) در سطح 15 و ...

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