نتایج جستجو برای: nsgaii method
تعداد نتایج: 1630206 فیلتر نتایج به سال:
a significant problem in multicarrier communication systems is the necessity to reduce the value of papr (peak-to-average power ratio) of transmitting signal. in this thesis we study the effect of the system parameters such as coding and modulation types on papr and ultimate ber in a mc-cdma system. in this study we consider fading channel as well as the nonlinearity of transmitter’s amplifier ...
در بازارهای رقابتی امروزی، با گرایش شرکتها به سمت مشتریمداری، مدیریت ارتباط با مشتری نیز پیچیدهتر شده است. پرسش اصلی مطرح در این زمینه، چگونگی شناسایی مشتریان کلیدی و سودآور شرکت است. بهاینمنظور، شرکتها کوشیدند تا با بخشبندی مشتریان به گروههای مختلف براساس معیارهایی ویژه، ویژگیهای رفتاری آنها را شناسایی و تحلیل کنند. با این کار زمینهای مناسب برای تخصیص بهینة منابع محدود، بهکارگیری ر...
In this article, the multi-objective optimization of cylindrical aluminum tubes under axial impact load is presented.The absorbed energy and the specific absorbed energy (SEA) are considered as objective functions while the maximum crush load should not exceed allowable limit. The geometric dimensions of tubes including diameter, length and thickness are chosen as design variables. The Non-domi...
This paper presents a novel multi-objective mathematical model of a periodic vehicle routing problem (PVRP) in a competitive situation for obtaining more sales. In such a situation, the reaching time to customers affects the sale amount therefore, distributors intend to service customers earlier than other rivals for obtaining the maximum sale. Moreover, a partial driver’s benefit is related...
Electricity is one of the most important carriers of energy used in buildings. By introducing energy smart grids (SG) and energy micro smart grids (MSGs) alongside smart buildings, a good platform has been provided for optimal planning of electricity production and consumption. In this paper, an MSG consists of renewable resources, diesel generators and cell batteries in bidirectional connectio...
This research aims to predict PV output power by using different neuro-evolutionary methods. The proposed approach was evaluated by a data set, which was collected at 5-minute intervals in the photovoltaic laboratory of Niroo Research Institute of Iran (Tehran). The data has been divided into three intervals based on the amount of solar irradiation, and different neural networks were used for p...
چکیده:مدیریت توان راکتیو نقش مهمی در بهره برداری سیستم قدرت با هدف کاهش تلفات توان و آزادسازی ظرفیت خطوط انتقال ایفا می نماید. این مسئله انگیزه ای را جهت توسعه بازار توان راکتیو منابع تولید پراکنده در شبکه های توزیع به وجود آورده است. در این مقاله ساختاری جهت قیمت گذاری توان راکتیو منابع تولید پراکنده با در نظر گرفتن تابع هزینه تزریق توان راکتیو آن ها ارائه می شود. برای این منظور منحنی قیمت تو...
By replacing the selection component, a well researched evolutionary algorithm for scalar optimization problems (SOPs) can be directly used to solve multi-objective optimization problems (MOPs). Therefore, in most of existing multi-objective evolutionary algorithms (MOEAs), selection and diversity maintenance have attracted a lot of research effort. However, conventional reproduction operators ...
today, scouring is one of the important topics in the river and coastal engineering so that the most destruction in the bridges is occurred due to this phenomenon. whereas the bridges are assumed as the most important connecting structures in the communications roads in the country and their importance is doubled while floodwater, thus exact design and maintenance thereof is very crucial. f...
abstract biometric access control is an automatic system that intelligently provides the access of special actions to predefined individuals. it may use one or more unique features of humans, like fingerprint, iris, gesture, 2d and 3d face images. 2d face image is one of the important features with useful and reliable information for recognition of individuals and systems based on this ...
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