期刊文献+
共找到7篇文章
< 1 >
每页显示 20 50 100
Efficient Lubytransform encodingalgorithm based on short cycle elimination
1
作者 曹聪哲 费泽松 匡镜明 《Journal of Beijing Institute of Technology》 EI CAS 2014年第3期407-412,共6页
An effective Luby transform (LT) encoding algorithm based on short cycle elimination is proposed to improve decoding probabilities of short length LT codes. By searching the generator ma- trix, some special encoded ... An effective Luby transform (LT) encoding algorithm based on short cycle elimination is proposed to improve decoding probabilities of short length LT codes. By searching the generator ma- trix, some special encoded symbols are generated by the encoder to effectively break the short cycles that have negative effect on the performance of LT codes. Analysis and numerical results show that by employing the proposed algorithm, the encoding complexity decreases and the decoding probabili- ties improve both in binary erasure channels (BECs) and additive white gauss noise (AWGN) chan- nels. 展开更多
关键词 Luby transform (LT) codes short cycle encoding algorithm
下载PDF
Current waveforms and sequence control system of microprocessor-controlled short cycle stud welding converter
2
作者 张义 李洪文 +2 位作者 白志范 邓占锋 孙威威 《China Welding》 EI CAS 1998年第1期31-35,共5页
The applied conditions of stud welding on body of automobile, and the current waveforms and sequence control techniques which are set to meet the quality of stud welding in the car body, are introduced in this paper. ... The applied conditions of stud welding on body of automobile, and the current waveforms and sequence control techniques which are set to meet the quality of stud welding in the car body, are introduced in this paper. The realizing method of current waveforms and sequence control based on microprocessor are also discussed in detail. The waveforms of output welding current and voltage are measured. It is proved that the techniques including current waveforms & sequence control can successfully meet the demand of automobile stud welding. 展开更多
关键词 short cycle control system stud welding
下载PDF
Group Edge Choosability of Planar Graphs without Adjacent Short Cycles 被引量:1
3
作者 Xin ZHANG Gui Zhen LIU 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2013年第11期2079-2086,共8页
In this paper, we prove that 2-degenerate graphs and some planar graphs without adjacent short cycles are group (△ (G)+1)-edge-choosable, and some planar graphs with large girth and maximum degree are group △(... In this paper, we prove that 2-degenerate graphs and some planar graphs without adjacent short cycles are group (△ (G)+1)-edge-choosable, and some planar graphs with large girth and maximum degree are group △(G)-edge-choosable. 展开更多
关键词 Group edge coloring list coloring planar graphs short cycles GIRTH
原文传递
A Study of the Bullwhip Effect for Short Life Cycle Products in Supply Chain Management
4
作者 CAO Yong-hui LI Hui 《International Journal of Plant Engineering and Management》 2009年第2期65-69,共5页
Shorter product life cycles present new dressed in supply chain literature. This research challenges to managing production and logistics not adequately adaddresses issues pertaining to the management of supply chains... Shorter product life cycles present new dressed in supply chain literature. This research challenges to managing production and logistics not adequately adaddresses issues pertaining to the management of supply chains in a short life cycle environment. In this paper, we study the short life cycle environment; then we develop the ventory policy of the indirect manufacturer by explicitly using his demand us an output of the retailer's optimal inoptimal ordering policy. Finally, we also provide causes of the bullwhip effect in the context of short life cycle products. 展开更多
关键词 bullwhip effect short life cycle products supply chains
下载PDF
PRACTICAL ALGORITHMS FOR TORNADO CODES
5
作者 Ai Da Chang Yilin +1 位作者 Luo Zhong Wang Jing 《Journal of Electronics(China)》 2006年第2期274-276,共3页
Tornado codes have been used in the error control of data transmission in IP network. The efficiency of this erasure codes is critically affected by the short cycles in its bipartite graph. To remove this effect, two ... Tornado codes have been used in the error control of data transmission in IP network. The efficiency of this erasure codes is critically affected by the short cycles in its bipartite graph. To remove this effect, two algorithms are introduced: (1) while generating the graph, the cycle eliminating algorithm is used to reduce the number of the short cycles in it; (2) in the decoding algorithm, cycles that are inevitably in the graph are used to remove decoding efficiency degradation. The simulation results show that they have a better performance than that of general tornado codes. 展开更多
关键词 Tornado code Bipartite graph short cycle Erasure correcting efficiency
下载PDF
Optimal ordering policy for short life-cycle products under credit financing with dynamic adoption in supply chain 被引量:2
6
作者 Udayan Chanda Alok Kumar 《Journal of Management Analytics》 EI 2019年第3期269-301,共33页
Traditional inventory models are mostly ignorant of the life cycle dynamics of a technology product;hence,they often fail to identify different dimensions of inventory research.This paper attempts to investigate the r... Traditional inventory models are mostly ignorant of the life cycle dynamics of a technology product;hence,they often fail to identify different dimensions of inventory research.This paper attempts to investigate the relationship between adoption behavior of customers using life cycle dynamics and associated trade credit policies in order to optimize the total inventory cost.The demand model used in this paper treats sales as a function of awareness diffusion and adoption.Awareness is considered as a function of feedback effects from users/customers.Retailer’s optimal strategies for short life cycle product under credit financing were determined analytically.Finally,numerical examples have been used to support the theoretical results.Theoretical results have further been used to gain some managerial insights. 展开更多
关键词 INVENTORY stage-wise diffusion unfavorable information short life cycle trade credit
原文传递
Effects of short light/dark cycles on photosynthetic pathway switching and growth of medicinal Dendrobium officinale in aeroponic cultivation 被引量:2
7
作者 Yongsan Cheng Dongxian He +2 位作者 Jie He Genhua Niu Fang Ji 《International Journal of Agricultural and Biological Engineering》 SCIE EI CAS 2019年第5期38-43,共6页
Dendrobium officinale has high medicinal value but grows slowly in natural environment due to its special CAM photosynthetic pathway.In this study,D.officinale were grown aeroponically with light/dark cycles of 12 h/1... Dendrobium officinale has high medicinal value but grows slowly in natural environment due to its special CAM photosynthetic pathway.In this study,D.officinale were grown aeroponically with light/dark cycles of 12 h/12 h,4 h/4 h,and 2 h/2 h for 150 d.The photosynthetic electron transfer characteristics,photosynthetic CO_(2) fixation pathways,and accumulations of biomass and soluble polysaccharides in D.officinale leaves were studied.The results showed that the photosynthetic apparatus states of D.officinale in aeroponic cultivation under short light/dark cycles of 4 h/4 h and 2 h/2 h were better than that under 12 h/12 h.The dark net CO_(2) exchange percentages of D.officinale were negative in short light/dark cycles of 4 h/4 h and 2 h/2 h,and the daily net CO_(2) exchange amount and dry/fresh weight increases were doubled compared with those in 12 h/12 h light/dark cycle.High soluble polysaccharides content and the soluble polysaccharides yield of D.officinale were obtained in the shorter light/dark cycle of 2 h/2 h.Therefore,the photosynthetic pathway of D.officinale could be switched from CAM to C3 by short light/dark cycles of 4 h/4 h and 2 h/2 h,and its higher biomass accumulation and soluble polysaccharides yield could be obtained by the shorter light/dark cycle of 2 h/2 h in aeroponic cultivation. 展开更多
关键词 dark net CO_(2)exchange percentage photosynthetic pathway short light/dark cycle soluble polysaccharides
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部