4篇
您的检索式：作者名="LIXiaoping"
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| 1 | An Efficient Constructive Heuristic for Permutation Flow Shops to Minimize Total Flowtime显示文摘In this paper, FFC (Fast fiowtime-computing) is presented for fiowtime computing in flow shops. The CPU-time of an algorithm for flow shops can be reduced considerably by replacing classical flowtime computing with FFC based on the facts that FFC is faster than the classical one and that flowtime computing of schedules/partial schedules is the main computational burden of most algorithms for flow shops. This is illustrated by modifying RZ, one of the three best existing heuristics(FL, WY and RZ) for flowtime minimization, with FFC in which about half of the CPU-time is saved. An efficient constructive heuristic is proposed for permutation flow shops with flowtime minimization, of which the CPU-time is more than that of RZ but much less than those of FL and WY. Our proposal is compared with FL, WYand RZ in terms of ARPD (Average relative percentage deviation), STD (Standard deviation) and BEST (number of best solutions obtained for a given size of problems). Computational results show that the proposed heuristic outperforms WY and RZ, and also outperforms FL when job-machine ratio is small. However, as the ratio increases, the proposal will finally be outperformed by FL but needs far less CPU-time than FL does. | LIXiaoping WUCheng | 2005 | Chinese Journal of Electronics2005，14，2： | 6 |
| 2 | RNAi-mediated knocking-down of rlpk2 gene retarded soybean leaf senescence显示文摘Leaf senescence that occurs in the last stage of leaf development is a genetically programmed process. It is very significant to elucidate the molecular mechanisms that control the initiation and progression of leaf senescence and the way the senescence signal is transduced. In a previous study on artificially induced soybean leaf senescence, we cloned a novel gene designated rlpk2 (Genbank Accession No. AY687391) that encodes a leucine-rich repeat (LRR) receptor like protein kinase. The expression level of rlpk2 gene was shown to be strongly up-regulated during both the natural leaf senescence process in this report and the artificially induced primary-leaf-senescence process in our previous work. The RNA interference (RNAi)-mediated knocking-down of rlpk2 dramatically retarded both the natural and nutrient deficiency-induced leaf senescence in transgenic soybean. The transgenic leaves showed more cell-aggregated surface structure and higher content of chlorophyll. | LIXiaoping MAYuanyuan LIPengli ZHANGLiwen WANGYong ZHANGRen WANGNingning | 2005 | Chinese Science Bulletin2005，50，12： | 3 |
| 3 | Exponential Stability for Delayed Cellular Neural Networks and Estimate of Exponential Convergence Rate显示文摘A new sufficient condition for global ex-ponential stability and lower bounds on the rate of ex-ponential convergence of delayed cellular neural networks (DCNNs) is obtained by means of a method based on delay differential inequality. The method which does not make use of any Lyapunov functionals, is simple and effective for the stability analysis of neural networks with delay. Some previously established results in the literature are shown to be special cases of the presented result. | LIXiaoping JIAOLicheng | 2003 | Chinese Journal of Electronics2003，12，3： | 1 |
| 4 | PrepaGration,characterizationandstudyonphotocatalyticperGformanceofnanometerTiO2 显示文摘 | WuFengqing RuanShengping LiXiaoping etal | 2001 | JournalofFunctionalMaterials2001，32，1： | 1 |
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