In order to enhance the applying efficiency of cl , the cause of premature convergence in binary - coded genetic algorithms ( gas ) is analyzed in this dissertation . the drawback of conventional mutation operator in preventing premature convergence is subsequently pointed out . whereafter , a genetic algorithm , which can be implemented via general logic gate circuit , is proposed 为了提高计算智能的应用效率,本文分析了二进制遗传算法中早熟收敛的成因,指出了传统的变异算子在防止早熟收敛方面的不足,提出了一种能有效预防早熟现象的二元变异算子,并在此基础上提出了一种便于用常规逻辑门电路实现的遗传算法。
Herein we designed and synthesized three photoinduced electron transfer ( pet ) phosphoroionophores , ( 1 - bromo - naphthalen - 2 - ylmethyl ) - bis - ( 2 - hydroxyl - ethyl ) - amine ( bnd ) , ( 1 - bromo - naphthalen - 2 - yl - methyl ) - bis - ( 2 - cholor - ethyl ) - amine ( bnc ) and 7 , 16 - bis - ( 1 - bromo - naphthalen - 2 - ylmethyl ) - 1 , 4 , 10 , l3 - tetraoxa - 7 , l6 - diaza - cyclooctadecane and their phosphorescent characteristics were studied , compared with 1 - bromo - 2 - methylnaphthalene . the experimental results showed that strong p hosphorescence could be observed in p - cyclodextrin aqueous solution only at low ph value . this system combined and and not function to produce a three - input inhibit ( inh ) logic gate 实验结果表明,在环糊精水溶液中只有在较低ph时,才能有效抑制分子内的pet过程,使磷光体发射强的磷光,体系的磷光状态为off - on ,同时体系包含了and ( - cdandproton )和not ( o _ 2 )逻辑功能,可作为一种三输入的inhibit逻辑开关。
With the rapid development of semiconductor , digital integrated circuit ( p , memory , standard logic gates , etc . ) and advance computer technology , the various measuring instruments ( virtual instruments ) with the powerful function of pc are produced in different industrial and scientific research fields . as we all known , the traditional instruments are usually built with discrete components and small scale ics , the disadvantages are obvious in system design , debugging and maintenance 随着半导体技术与数字集成电路(微处理器、存贮器以及标准逻辑门电路等)技术的迅速发展,特别是随着计算机技术的发展,在工业生产和科学技术研究的各行各业中,人们利用pc机的强大处理功能代替传统仪器的某些部件,开发出各种测量仪器(虚拟仪器) ,传统仪器的数字逻辑部分多是采用分立集成电路( ic )组成,分立ic愈多,给系统的电路设计、调试及维护带来诸多不便。
This paper presents the conversion from dynamic logic gate to markov chain , the solution of dynamic subtree top event failure probability and the method of obtaining the failure mode of subsystem using markov model , that is sequence cutsets of the dynamic subtree . the typical approach to importance analysis of component is impractical for large systems in markov model , so this paper also provides a simple and intuitionistic graph solution based on markov chain 论文研究了动态逻辑门向马尔可夫链的转化方法,利用马尔可夫链法求解动态子树顶事件概率,以及通过马尔可夫状态转移图直接找出子系统的故障模式和薄弱环节,即得到动态子树的顺序割集。
The major characteristic of the software radio experiment platform is a piece of large - scale field programmable logic gate array ( fpga ) used to realize sequential eontrol , orthogonality transform and digital filtering , which makes hardware structure simplely and has strong ability of reconstruction ; the simple development and strong flexibility is a characteristic of software programming way to design hardware circuit 该软件无线电实验平台的主要特点是:由一片fpga实现时序控制、正交变换和数字滤波部分,使得硬件结构简单、可重构性强;以软件编程方式设计硬件电路,具有开发简单,灵活性强等优点。