慢中子區 的英文怎麼說
中文拼音 [mànzhōngziqū]
慢中子區
英文
slow-neutron region-
But, pso convergence ' s speed become slow in latter iterative phase, and pso is easy to fall into local optimization. at present, some scholars improve base pso mostly using 3 methods : disperse algorithm, increase convergence speed, enhance particle ' kinds. in the paper, i put forward 2 methods aiming at local best resutl but not whole best result. i modify base pso using the last method. some scholars put forward times initializations, so i select best result after circulating some times to be a parameter of formula. first, put particle into some small region, and ensure every region having one paticle at least. second, every region ' s particle has probability transfer other regions. although increase running time, enhance particle ' kinds, decrese the probability of convergence far from whole best result. nerms ( network educational resource management system ) is one of the research projects in the science and technology development planning of jilin province. the aim of nerms is to organize and manage various twelve kinds of network educational resources effectively so that people can share and gain them easily and efficiently, so as to quicken the development of network education
但粒子群演算法仍存在如下不足:首先在多峰的情況下，粒子群有可能錯過全局最優解，遠離最優解的空間，最終得到局部最優解;其次在演算法收斂的情況下，由於所有的粒子都向最優解的方向群游，所有的粒子趨向同一，失去了粒子間解的多樣性，使得後期的收斂速度明顯變慢，同時演算法收斂到一定精度時，演算法無法繼續優化，本文對原始粒子群演算法提出了二點改進方案: 1 .演算法迭代到一定代數后，把此時找到的全局最優解當作速度更新公式的另一參數（本文稱之為階段最優解）再進行迭代; 2 .每次迭代過程中除最優解以外的每個粒子都有一定概率「變異」到一個步長以外的區域，其中「變異」的粒子在每一維上都隨機生成一個步長。The system simultaneously used the technique of computer, electron as well as single - chip microcomputer, and solved the key problem brought about by the pump ' s high speed revolving all the time. that is, the electrical energy ' s waste, which existed in the water supply system of the city and the high building. at the same time overcome the shortcomimg of long reaction time of the traditional water supply system, varied frequency at low speed, made use of large area, and consume a lot
該系統集計算機、電子技術於一體，不但解決了目前城市供水系統和小區高樓供水中，水泵一直高速轉動所帶來的電能浪費的問題，而且也克服了傳統的供水系統響應時間長，變頻速度慢，佔地面積大，投資大等缺點，為實時恆壓供水提供了一種實用的方法。
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