Future wireless systems are characterized by large user capacity, high speed, high reliability. Yet, inherent fading and interference of wireless communications render these design objectives challenging. As an efficient and inexpensive method to combat wireless fading, cooperative communications ([1], [2]) has recently attracted lots of research efforts and practical implementations. The princ...

the purpose of the present research was to study the effect of cooperative methodology on the social skill development of the primary students. the methodology was quasi-experimental, with pre-test, post-test, and control group. the population of the research was all 486 ‘laleh’ primary school male students in the year of 2009-2010, among whom, 61 four-grade participants were finally chosen. th...

Competition solves a universal problem about pattern processing by cellular systems. Competition allows cells to automatically retune their sensitivity to avoid noise and saturation effects. All competitive systems induce decision schemes that permit them to be classified. Systems are identified that achieve global pattern formation, or decision-making, no matter how their parameters are chosen...

The supplier's cooperative design enables the enterprise to use supplier's technical ability fully, reduce the time of product coming into the market, improve quality, and reduce cost. In order to evaluate the supplier cooperative design ability (SCDA) scientifically and accurately, this paper overcomes the shortcoming of traditional linear SCDA evaluation method, proposes an improved support v...

Cooperative routing in Wireless Sensor Networks can improve performance in these types of networks. In our work, we propose a routing algorithm called Location-based Cooperative Routing with Sensor Power-upper-limit for Wireless Sensor Networks. The algorithm is based on the principle of minimum link power and aims to take advantage of nodes cooperation to make the link work well in Wireless Se...

Farmers, as rural producers, produce agricultural products for the necessities of life while fulfilling economic needs. Farmers in Sukoharjo, Indonesia, have formed farmer groups, but these groups are not managed mechanically. Therefore, it is necessary to think a business entity that supports production process harvest and sale support improvement farmers’ lives. The ideal farmers Cooperative ...

In this paper, we propose a beamforming design method for cooperative NOMA downlink system wherein relay node assisting far user operates in full-duplex mode to achieve high spectral efficiency. The proposed method, based on the zero-forcing (ZF) principle, suppresses both self-interference and inter-user interference. Simulation results show that is considerably superior conventional transmit ...

Combined with our aircraft combat capability, this paper aims at the unmanned aerial vehicles automatic attack process of single target, in accordance with the principle of maximum killing the enemy and establish the model of target threat based on the situation of two sides. According to the importance of our members, defense model, and the enemy motion trajectory with the threat model and the...

A dialogue plays an important role in learning how to solve a problem and form a concept. We are developing a problem solving and knowledge acquisition system based on co-reference between drill texts and dialogue with a teacher, focusing on first-grade mathematics. This paper presents a method of cooperative understanding of utterances and gestures within dialogue. We first describe our system...