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康佳T2516型电视机场线性不良检修
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作者 韩军春 林玉川 《家庭电子》 2004年第3期29-29,共1页
关键词 康佳公司 T2516 电视机 线性不良 故障检修
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场输出集成电路的电源电压与上线性不良
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作者 刘午平 《家电维修》 1994年第12期4-4,共1页
关键词 场输出集成电路 电源 电压 线性不良
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东霸D—2188彩电场线性不良故障检修
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作者 张同俊 《家电检修技术》 2002年第11期12-13,共2页
故障现象:上部图像明显拉长、光栅稀疏,下部光栅密集、图像压缩并反卷重叠倒置。分析与检修:据故障现象分析,显然是场输出电路部分不正常。该机采用的是LA7840集成电路作场输出级,对I^2C总线控制的单片电视信号处理集成电路LA76810形成... 故障现象:上部图像明显拉长、光栅稀疏,下部光栅密集、图像压缩并反卷重叠倒置。分析与检修:据故障现象分析,显然是场输出电路部分不正常。该机采用的是LA7840集成电路作场输出级,对I^2C总线控制的单片电视信号处理集成电路LA76810形成的场锯齿波电压进行功率放大,推动场偏转线圈,具体电路如图1所示。通常场扫描故障大多是由于场输出部分的电解电容变值、失效造成的(如:漏液、漏电等)。此机较新,使用时间不太长,查看各电解电容外形均完好,更换场输出N451(LA7840)集成电路外围的电解电容试机,故障依旧,分别检查低阻值的各个水泥电阻,也无问题。 展开更多
关键词 东霸D-2188 彩电 线性不良故障 检修
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Modified Self-adaptive Immune Genetic Algorithm for Optimization of Combustion Side Reaction of p-Xylene Oxidation 被引量:1
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作者 陶莉莉 孔祥东 +1 位作者 钟伟民 钱锋 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第6期1047-1052,共6页
In recent years, immune genetic algorithm (IGA) is gaining popularity for finding the optimal solution for non-linear optimization problems in many engineering applications. However, IGA with deterministic mutation fa... In recent years, immune genetic algorithm (IGA) is gaining popularity for finding the optimal solution for non-linear optimization problems in many engineering applications. However, IGA with deterministic mutation factor suffers from the problem of premature convergence. In this study, a modified self-adaptive immune genetic algorithm (MSIGA) with two memory bases, in which immune concepts are applied to determine the mutation parameters, is proposed to improve the searching ability of the algorithm and maintain population diversity. Performance comparisons with other well-known population-based iterative algorithms show that the proposed method converges quickly to the global optimum and overcomes premature problem. This algorithm is applied to optimize a feed forward neural network to measure the content of products in the combustion side reaction of p-xylene oxidation, and satisfactory results are obtained. 展开更多
关键词 self-adaptive immune genetic algorithm artificial neural network measurement p-xylene oxidation process
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