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基于PAC Designer平台的滤波器的设计 被引量:1
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作者 姬波 高有堂 《信息技术》 2004年第9期18-21,共4页
介绍了PACDesiger工作平台设计电路的方法,给出了使用模拟可编程集成电路isp PAC10实现二阶滤波器电路的设计与仿真结果分析。
关键词 模拟可编程 滤波器 PAC desiger ispPAC10
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Solving geometric constraints with genetic simulated annealing algorithm 被引量:3
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作者 刘生礼 唐敏 董金祥 《Journal of Zhejiang University Science》 EI CSCD 2003年第5期532-541,共10页
This paper applies genetic simulated annealing algorithm (SAGA) to solving geometric constraint problems. This method makes full use of the advantages of SAGA and can handle under-/over- constraint problems naturally.... This paper applies genetic simulated annealing algorithm (SAGA) to solving geometric constraint problems. This method makes full use of the advantages of SAGA and can handle under-/over- constraint problems naturally. It has advantages (due to its not being sensitive to the initial values) over the Newton-Raphson method, and its yielding of multiple solutions, is an advantage over other optimal methods for multi-solution constraint system. Our experiments have proved the robustness and efficiency of this method. 展开更多
关键词 SAGA Geometric constraint solving Variational desig n
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Landscape Design of Urban Rail Transit Complex Based on the Concept of Sustainable Development 被引量:1
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作者 NIU Shaofei SHEN Zhongwei 《Journal of Landscape Research》 2016年第4期21-26,共6页
On the basis of current development of urban rail transit complex in China,this paper proposed that it is necessary to build a complete landscape design system of urban traffic complex.Combined with the concept of sus... On the basis of current development of urban rail transit complex in China,this paper proposed that it is necessary to build a complete landscape design system of urban traffic complex.Combined with the concept of sustainable urban landscape design,this paper explored landscape design of urban rail transit complex from the macroscopic,mesocopic and microscopic perspective,and analyzed many design cases to provide references for the sustainable landscape design of urban rail transit complex in China. 展开更多
关键词 Urban rail transit complex Sustainable concept Landscape desig
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Central Composite Design响应面法优化厚裂凤仙花总黄酮提取工艺研究
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作者 文琴琴 徐梅 +3 位作者 严福林 张浪 周雅雪 魏升华 《广东化工》 CAS 2022年第3期72-75,78,共5页
为厚裂凤仙花中总黄酮资源的开发利用,本文采用单因素与星点-效应面法相结合的方式,考察提取溶剂浓度、料液比、提取时间、提取次数对厚裂凤仙花中总黄酮提取率的影响。优选出厚裂凤仙花总黄酮最佳提取方法为:甲醇体积分数80%,料液比为1... 为厚裂凤仙花中总黄酮资源的开发利用,本文采用单因素与星点-效应面法相结合的方式,考察提取溶剂浓度、料液比、提取时间、提取次数对厚裂凤仙花中总黄酮提取率的影响。优选出厚裂凤仙花总黄酮最佳提取方法为:甲醇体积分数80%,料液比为1︰64,提取时间为50 min;提次数为3次;验证实验结果表明,总黄酮平均提取率为5.51 mg/g,与实验模型RSD值为0.79%。建立的模型与实际方案有较高拟合度,可作为苗药厚裂凤仙花总黄酮提取工艺参数。 展开更多
关键词 厚裂凤仙花 总黄酮 Central Composite Desig响应面法 提取工艺
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如何躲避龙卷风
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作者 刘灵 《英语沙龙(初级版)》 2005年第8期52-53,共2页
龙卷风是小范围但却能致命的风暴,狂风扫过大地,一切均被摧毁。它们是以极快速度旋转的很猛烈的局部性风暴。许多龙卷风都伴随有冰雹、大雨和闪电。
关键词 速度旋转 扫过 最底层 地区移动 LIGHTNING 局部性 避难区 favorable desig
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