An improvement on the transient response of tracking for the sampled-data system based on an improved PD-type iterative learning control     

Fu-Ming Chen  Jason Sheng-Hong Tsai  Ying-Ting Liao  Shu-Mei Guo  Ming-Chung Ho  Fu-Zen Shaw  Leang-San Shieh 《Journal of The Franklin Institute》2014

An improvement on the transient response of tracking for the sampled-data system based on an improved PD-type iterative learning control (ILC) is proposed in this paper. The developed analog ILC method and the high-gain property tracker design methodology are first combined to significantly reduce learning epochs and overcome the initial condition shift problem and discontinuous reference input in the traditional ILC. Besides, the proposed ILC improves the transient response and decreases the rate of weighting matrices Q$Q$ to R$R$ under the traditional linear quadratic tracker design. First, the off-line observer/Kalman filter identification (OKID) is used to determine the appropriate (low-) order system parameters and state estimator for the physical system with unknown system equation, so that the model-based PD-type ILC can be implemented for practical applications. Then, to improve the transient response and decrease the control effort, the proportional difference type (PD-type) ILC algorithm is combined with the high-gain property linear quadratic tracker (LQT) design to construct the high performance tracker for the model-based sampled-data systems. Furthermore, the discrete-time version high performance tracker design for the unknown stochastic sampled-data system via the iterative learning control method is proposed in this paper based on the Euler method and the digital redesign approach. Finally, some examples are given for illustrating the effectiveness of the proposed method.  相似文献   

一种改进的DV-HOP算法在WSN中的定位研究     

高洪波  廖明潮 《科技通报》2014,(9)

如何能够更好的提高节点定位一直都是WSN研究的重点,本文在DV-HOP定位算法的基础上,从误差精度,锚节点稳定度和反向学习选择-最小二乘估计来对节点定位的3个方面进行改进。首先在定位误差精度中引入混沌优化算法,其次在锚节点处理中引入稳定度概念,最后在未知节点定位中引入反向学习和最小二乘估计。改进后的算法在通信半径和拓扑结构两个方面进行了仿真实验,实验表明,本文算法能够有效的减少计算带来的定位误差,提高定位精度。  相似文献   

我国高校图书馆读者决策采购研究综述     

廖利香 《情报探索》2014,(12):79-83

对中国期刊全文数据库中2011-2014年有关高校图书馆读者决策采购的文献进行统计,从论文年度、期刊分布两个方面总结了研究现状,并且介绍高校图书馆读者决策采购的概念、缘起、优势、所面临的问题、国外成功案例及其对我国的启示,最后指出当前研究存在的不足之处及今后的展望,为进一步研究提供参考。  相似文献   

Tandem array of nanoelectronic readers embedded coplanar to a fluidic nanochannel for correlated single biopolymer analysis     

Leonardo Lesser-Rojas  K. K. Sriram  Kuo-Tang Liao  Shui-Chin Lai  Pai-Chia Kuo  Ming-Lee Chu  Chia-Fu Chou 《Biomicrofluidics》2014,8(1)

We have developed a two-step electron-beam lithography process to fabricate a tandem array of three pairs of tip-like gold nanoelectronic detectors with electrode gap size as small as 9 nm, embedded in a coplanar fashion to 60 nm deep, 100 nm wide, and up to 150 μm long nanochannels coupled to a world-micro-nanofluidic interface for easy sample introduction. Experimental tests with a sealed device using DNA-protein complexes demonstrate the coplanarity of the nanoelectrodes to the nanochannel surface. Further, this device could improve transverse current detection by correlated time-of-flight measurements of translocating samples, and serve as an autocalibrated velocimeter and nanoscale tandem Coulter counters for single molecule analysis of heterogeneous samples.  相似文献   

转型的地方高师基础性专业培养学术型人才的模式探讨--以数学专业为例     

凌征球  廖珊莉  李文凤  廖孙益 《科教文汇》2014,(31)

本文根据地方高师目前数学专业的实际情况及转型要求,对学术性人才的培养进行了较为深刻的探讨。并以玉林师范学院为例,浅述对地方高师数学专业学术型人才培养的认识。  相似文献   

Catastrophe and hope: two literary examples from Taiwan     

Chaoyang Liao 《Inter-Asia Cultural Studies》2013,14(1):59-75

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论青少年篮球运动员快速力量训练原则     

廖小林 《体育科技》2001,22(4):38-40

借鉴运动训练学、运动生物化学、运动生物力学等基本理论,运用篮球运动训练理论,结合多年从事青少年篮球运动训练的实践经验,论述了快速力量训练过程中应遵循的六条基本原则.  相似文献   

Difference between Western and Chinese Civilization from Classical Urban Comparison     

Liao Zhongle 《齐齐哈尔师范高等专科学校学报》2008,(6)

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浅谈现代化服装设备对中国服装产业的影响     

廖莉蓉 《科技广场》2007,(8):35-36

目前我国已经成为世界服装加工制造中心,但始终无法摆脱"大而不强"的局面。要使中国服装业在国际市场占有一席之地,必须加快服装现代化设备的推广和普及,尤其是服装CAD/CAM的普及和应用,以提升服装企业的形象和品牌的档次,从而大力推动中国服装产业的加速发展。  相似文献   

裸子植物的幼苗类型及其进化关系     

叶能干  芶光前  廖海民  张著林 《中国科学院研究生院学报》1993,31(6):505-516

 裸子植物的幼苗可分为3个类型、8个亚型。即：1．苏铁型，包括苏铁亚型、银杏亚型、南洋杉亚型；2．松型，包括杉亚型，松亚型，麻黄亚型；3．买麻膝型，包括买麻滕亚型，百岁兰亚型。类型和亚型都有特征描述，并有一个检索表。文中首先讨论了种子的起源是多元的，因而裸子植物的起源也应是多元的，是前裸子植物不同类型平行进化的结果。 又根据裸子植物幼苗类型的形态特征，提出裸子植物有4条进化路线，即：苏铁路线，银杏路线，松柏路线和买麻滕路线。还讨论幼苗类型之间的进化关系，认为除买麻滕型幼苗因其形态特殊有自己独特的发展路线外，总的趋势是由留土萌发向出土萌发发展。  相似文献