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基于分群游走机制的灰狼优化算法的FPRM逻辑电路面积优化
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作者 曹新龙 何振学 +4 位作者 王伊瑾 赵晓君 张艳 肖利民 王翔 《兰州大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第4期521-527,共7页
针对基于XNOR/OR的固定极性Reed-Muller电路(FPRM)逻辑电路面积优化方法搜索最优解速度较慢,易陷入局部最优等问题,提出一种新的FPRM逻辑电路面积优化方法,利用基于分群游走机制的灰狼优化算法(GDGWO)搜索电路面积最小的FPRM电路.GDGWO... 针对基于XNOR/OR的固定极性Reed-Muller电路(FPRM)逻辑电路面积优化方法搜索最优解速度较慢,易陷入局部最优等问题,提出一种新的FPRM逻辑电路面积优化方法,利用基于分群游走机制的灰狼优化算法(GDGWO)搜索电路面积最小的FPRM电路.GDGWO在初始化种群后,采取“轮盘赌”选择算法选出合适的新群体头狼,以提高种群多样性;执行种群分裂机制,防止因原始种群陷入局部最优而降低算法的鲁棒性;在分群搜索开发过程中引入改进后的随机游走策略,使灰狼种群能够更快地包围猎物,提高算法的收敛速度.基于北卡罗来纳微电子中心Benchmark测试电路的实验结果表明,GDGWO与粒子群算法相比,电路面积优化率提升57.42%;与黑猩猩算法相比,提升41.94%;与原始灰狼优化算法相比,提升43.68%. 展开更多
关键词 固定极性Reed-Muller电路 面积优化 灰狼算法 分群机制 随机游走
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根生群优化算法
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作者 吴正军 冯翔 虞慧群 《计算机应用研究》 CSCD 北大核心 2019年第1期22-26,52,共6页
针对全局优化问题,基于一类支持向量数据描述(SVDD)和已有的根系生长算法提出一种新的智能优化算法——根生群优化算法,将根系划分为主根群体和侧根群体。基于SVDD描述主根群体的生长行为,将土壤中养分浓度最高的位置作为全局优化的目标... 针对全局优化问题,基于一类支持向量数据描述(SVDD)和已有的根系生长算法提出一种新的智能优化算法——根生群优化算法,将根系划分为主根群体和侧根群体。基于SVDD描述主根群体的生长行为,将土壤中养分浓度最高的位置作为全局优化的目标,构建了根系生长模型;分析了RGSO的数学模型,从理论上证明了RGSO的收敛性。在实验中,与当前最先进的其他三种算法进行综合比较,并观察了不同参数对优化效果的影响。实验结果验证了RGSO的收敛性和有效性,表明RGSO是一种解决全局优化问题的有效算法。 展开更多
关键词 根生算法 分群机制 SVDD 优化问题
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Impact of Removal of City Gas Subsidies on Chinese Urban Residents 被引量:1
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作者 廖华 朱治双 王璐 《Transactions of Tianjin University》 EI CAS 2012年第4期309-314,共6页
The current cost-plus natural gas pricing mechanism makes the gas price too low,resulting in a lot of consumer-side subsidies and over-consumed natural gas.This paper applies the price-gap approach and input-output an... The current cost-plus natural gas pricing mechanism makes the gas price too low,resulting in a lot of consumer-side subsidies and over-consumed natural gas.This paper applies the price-gap approach and input-output analysis technology to quantitatively analyze both the direct and indirect effects on urban residents under the condition that natural gas subsidies are cancelled in China in 2007.It is shown that the gas price will increase by 33.3%-41.6%,and the residential consumption expenditure by 0.26%-0.33%.The low-income groups are mostly affected,so different subsidies should be implemented to make subsidies more efficient. 展开更多
关键词 price subsidies price-gap approach input-output analysis technology
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Research on the Activity Characteristics of Small Earthquake Swarms in the Muli Area of Sichuan Province
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作者 Cai Yichuan Dai Shigui Wei Yaling 《Earthquake Research in China》 CSCD 2016年第2期215-223,共9页
In this article,we relocated the seismic source location of the earthquakes in the Muli area of Sichuan,inverted the focal mechanism of the larger earthquakes and analyzed the relationship between the water level of t... In this article,we relocated the seismic source location of the earthquakes in the Muli area of Sichuan,inverted the focal mechanism of the larger earthquakes and analyzed the relationship between the water level of the Jinping reservoir and the frequency of the earthquake swarm. The results show that:( 1) The epicenters of the relocated small earthquake swarms are distributed in a seismic zone,and the earthquake focal depths were in the range of 0- 12 km.( 2) By analyzing the earthquake swarm spatial distribution,we found that the swarms were generated by one branch fault on the west of Xiaojinhe fault.( 3) The focal mechanism of the three earthquakes with magnitude greater than 4. 0 is significantly different,with the shallow source thrust events affected by vertical stress,and the strike-slip events are related to regional stress tectonic activity. 展开更多
关键词 Earthquake swarm activities Seismic zone Double difference locationmethod Focal mechanism
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