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一种改进的动态数据结构软件水印编码方案
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作者 李婧 《电子技术应用》 北大核心 2007年第8期150-152,156,共4页
在经典的K基数循环链表结构和PPCT结构水印编码方式的基础上,提出了一种新的动态数据结构软件水印编码方案。理论和实验证明,该方案中采用改进的PPCT水印编码结构在多种评价指标上都具有一定的优势,是一个优良的动态软件水印编码方案。
关键词 软件水印 水印编码 K基数循环链表 改进的PPCT 数据率
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Substituent Effects on Reduction Potentials of Meta-substituted and Para-substituted Benzylideneanilines 被引量:1
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作者 王琳艳 曹朝暾 曹晨忠 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2016年第2期260-264,I0002,共6页
Effects of meta-substituent of 3,4'/4,3'/3,3'-substituted benzylideneanilines (XBAYs) on the electrochemical reduction potentials (E(Red)) were investigated, in which 49 samples of target compounds were synth... Effects of meta-substituent of 3,4'/4,3'/3,3'-substituted benzylideneanilines (XBAYs) on the electrochemical reduction potentials (E(Red)) were investigated, in which 49 samples of target compounds were synthesized, and their reduction potentials were measured by cyclic voltammetry. The substituent effects on the E(Red) of target compounds were analyzed and an optimality equation with four parameters (Hammett constant a of X, Hammett constant a of Y, excited-state substituent constant σexCC of X, and the substituent specific cross-interaction effect △σexCC2 between X and Y) was obtained. The results show that the factors affecting the E(Red) of 3,4'/4,31/3,3P-substituted XBAYs are different from those of 4,4'-substituted XBAYs. For 3,4'/4,3'/3,3'-substituted XBAYs, σ(X) and σ(Y) must be employed, and the contribution of △σexCC2 is important and not negligible. Compared with 4,4'-substituted XBAYs, X group contributes less to 3,4'/4,3'/3,3'-substituted XBAYs, while Y group contributes more to them. Additionally, it was observed that either para-substituted XBAYs or meta-substituted XBAYs, the substituent effects of X are larger than those of Y on the E(Red) of substituted XBAYs. 展开更多
关键词 3 4r/4 3'/3 3'-substituted benzylideneanilines Substituent effects Electro-chemical reduction potentials Cyclic voltammetry Excited-state substituent constant
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Bottleneck Prediction Method Based on Improved Adaptive Network-based Fuzzy Inference System (ANFIS) in Semiconductor Manufacturing System 被引量:4
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作者 曹政才 邓积杰 +1 位作者 刘民 王永吉 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第6期1081-1088,共8页
Semiconductor manufacturing (SM) system is one of the most complicated hybrid processes involved continuously variable dynamical systems and discrete event dynamical systems. The optimization and scheduling of semicon... Semiconductor manufacturing (SM) system is one of the most complicated hybrid processes involved continuously variable dynamical systems and discrete event dynamical systems. The optimization and scheduling of semiconductor fabrication has long been a hot research direction in automation. Bottleneck is the key factor to a SM system, which seriously influences the throughput rate, cycle time, time-delivery rate, etc. Efficient prediction for the bottleneck of a SM system provides the best support for the consequent scheduling. Because categorical data (product types, releasing strategies) and numerical data (work in process, processing time, utilization rate, buffer length, etc.) have significant effect on bottleneck, an improved adaptive network-based fuzzy inference system (ANFIS) was adopted in this study to predict bottleneck since conventional neural network-based methods accommodate only numerical inputs. In this improved ANFIS, the contribution of categorical inputs to firing strength is reflected through a transformation matrix. In order to tackle high-dimensional inputs, reduce the number of fuzzy rules and obtain high prediction accuracy, a fuzzy c-means method combining binary tree linear division method was applied to identify the initial structure of fuzzy inference system. According to the experimental results, the main-bottleneck and sub-bottleneck of SM system can be predicted accurately with the proposed method. 展开更多
关键词 semiconductor manufacturing system bottleneck prediction adaptive network-based fuzzy inference system
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零件在腐蚀疲劳下的机械强度 被引量:2
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作者 王振成 吴耀宇 +3 位作者 刘宏宇 刘瑞礼 冯宪民 孟凡勋 《机械设计与研究》 CSCD 北大核心 2014年第1期59-61,共3页
通过对不同机械零件材料在模拟实际工作环境和腐蚀介质中的疲劳试验,得出了应力循环频率、零件的预腐蚀、表面加工质量和拉压应力状态等各种因素,对机械零件处于腐蚀介质中疲劳强度的不同影响程度。提出了增加腐蚀疲劳强度的有效方法与... 通过对不同机械零件材料在模拟实际工作环境和腐蚀介质中的疲劳试验,得出了应力循环频率、零件的预腐蚀、表面加工质量和拉压应力状态等各种因素,对机械零件处于腐蚀介质中疲劳强度的不同影响程度。提出了增加腐蚀疲劳强度的有效方法与措施。 展开更多
关键词 腐蚀疲劳 疲劳强度 预腐蚀 脉动应力 循环频率 循环基数 非活化介质
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POINTED REPRESENTATIONS OFINFINITE DIMENSIONAL LIE ALGEBRAS
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作者 XUXIANG 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 1995年第2期255-260,共6页
A contravaried bilinear pairing X on every M(ρ) × M(ρθ) is determined and it is provedthat M(ρ)is irreducible if and only if K is left nondegellerate. It is also proved that every cyclicpointed module is a qu... A contravaried bilinear pairing X on every M(ρ) × M(ρθ) is determined and it is provedthat M(ρ)is irreducible if and only if K is left nondegellerate. It is also proved that every cyclicpointed module is a quotient of some Verma-like poillted module; moreover if it is irreduciblethen it is a quotieDt of the Vermarlike poiDted module by the left kernel of some bilinearpairing K. In case the mass fUnction is symmetric, there exists a bilinear form on M(ρ). It isproved that unitals pointed modules are integrable. In addition, a characterization of the massfunctions of Kac-Moody algebras is given, which is a generalization of the finite dimensionalLie algebras case. 展开更多
关键词 Pointed representation Primitive cycle Mass function Bilinear pairing.
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