Digital filters play a key role in the field of digital signal processing. This paper presents a linear phase digital low pass finite impulse response (FIR) filter design using particle swarm optimization and its two ...Digital filters play a key role in the field of digital signal processing. This paper presents a linear phase digital low pass finite impulse response (FIR) filter design using particle swarm optimization and its two new variants, dynamic and adjustable particle swarm optimization (DAPSO) and particle swarm optimization with variable acceleration factor (PSO-VAF) and illustrates the superiority of the PSO-VAF method over PSO based methods. Two fitness functions are considered. The fitness1 is used to find the possible minimum ripples in pass band and stop band in case of PSO, DAPSO and PSO-VAF. Fitness2 is able to control the ripples in both bands separately. A comparison of simulation results demonstrates the performance of PSO and its methods in designing digital low pass FIR filters.展开更多
如果你是斯巴鲁粉丝,那应该都知道,在发布限量150辆的WRX STi Final Edition(UK Version)之后,初代WRX STi正式收官。从上世纪90年代到今天,关于Impreza WRX(STi)与WRX(STi)的话题从未停止,不论是拉力赛还是房车赛,你都能见到它的身影。...如果你是斯巴鲁粉丝,那应该都知道,在发布限量150辆的WRX STi Final Edition(UK Version)之后,初代WRX STi正式收官。从上世纪90年代到今天,关于Impreza WRX(STi)与WRX(STi)的话题从未停止,不论是拉力赛还是房车赛,你都能见到它的身影。在2017年的东京车展(TAS)开幕前,斯巴鲁已经发布了一款名为Viziv Performance Concept的概念车,这很有可能是下一代斯巴鲁WRX STi的原型。不论将来这个系列的车型如何发展、演变,它在所有日系性能车车迷的心中永远占有一席之地。展开更多
本文简要介绍了目前软件规模度量中使用最广泛的IFPUG(International Function Point Users Group)组织的功能点分析方法FPA(Functional Point Analysis).指出了在实际使用过程中用FPA方法在计算软件项目值调整因子(VAF:Value Adjust-me...本文简要介绍了目前软件规模度量中使用最广泛的IFPUG(International Function Point Users Group)组织的功能点分析方法FPA(Functional Point Analysis).指出了在实际使用过程中用FPA方法在计算软件项目值调整因子(VAF:Value Adjust-ment Factor)时存在的不足,并给出了具体的改进方法.从而使改进后的FPA方法在对软件规模的估算上更为接近项目的实际开发情况.展开更多
文摘Digital filters play a key role in the field of digital signal processing. This paper presents a linear phase digital low pass finite impulse response (FIR) filter design using particle swarm optimization and its two new variants, dynamic and adjustable particle swarm optimization (DAPSO) and particle swarm optimization with variable acceleration factor (PSO-VAF) and illustrates the superiority of the PSO-VAF method over PSO based methods. Two fitness functions are considered. The fitness1 is used to find the possible minimum ripples in pass band and stop band in case of PSO, DAPSO and PSO-VAF. Fitness2 is able to control the ripples in both bands separately. A comparison of simulation results demonstrates the performance of PSO and its methods in designing digital low pass FIR filters.
文摘如果你是斯巴鲁粉丝,那应该都知道,在发布限量150辆的WRX STi Final Edition(UK Version)之后,初代WRX STi正式收官。从上世纪90年代到今天,关于Impreza WRX(STi)与WRX(STi)的话题从未停止,不论是拉力赛还是房车赛,你都能见到它的身影。在2017年的东京车展(TAS)开幕前,斯巴鲁已经发布了一款名为Viziv Performance Concept的概念车,这很有可能是下一代斯巴鲁WRX STi的原型。不论将来这个系列的车型如何发展、演变,它在所有日系性能车车迷的心中永远占有一席之地。
文摘本文简要介绍了目前软件规模度量中使用最广泛的IFPUG(International Function Point Users Group)组织的功能点分析方法FPA(Functional Point Analysis).指出了在实际使用过程中用FPA方法在计算软件项目值调整因子(VAF:Value Adjust-ment Factor)时存在的不足,并给出了具体的改进方法.从而使改进后的FPA方法在对软件规模的估算上更为接近项目的实际开发情况.
