An extension of contract net protocol with real time constraints

The contract net protocol has developed to specify problem solving communication for nodes in a distributed problem solving. Task distribution is affected by a negotiation process, a discussion carried on between nodes with tasks to be executed and nodes that may be able to execute those tasks. In contract net protocol, once negotiation successes, the task execution is assumed to success. However, in real world, even though a task is awarded to successfully bidding nodes, it may be delayed. Such delay may badly propagate in whole system. Here, we introduce real-time constraints into contract net protocol to manage task execution for avoiding the task's delay, or even though being delayed, the failure cannot propagate to whole system. In this paper, we first present a real-time contract net protocol which is an extension of contract net protocol with real-time constraints for distributed computing. Our proposition extends the basic negotiation protocol to negotiation and controlling execution of task. The controlling process is based on task deadline time we also present an extension of the internode language of contract net protocol specification with real-time constraints Li Qiaoyn, born in Jan. 1965, Lecturer     

基于话者分类和HMM的话者自适应语音识别

本文提出了一种基于话者分类和ＨＭＭ的话者自适应语音识别方法，采用对参考话者聚类、并按话者类分别建立ＨＭＭ模板的策略，对于新注册的用户，系统只需利用其极少量的语音，便可将与之最相近的一类模板指派给新用户，再采用基于谱空间映射的两级自适应方法，使系统自适应到用户的模式下工作．这种方法既提高了识别性能，又降低了自适应的难度，还有利于ＨＭＭ的建立．讨论了话者分类数和自适应语音数据对话者自适应效果及识别性能的影响，提出了一种在自适应语音数据不足情况下仍具有较好自适应效果的基于ＦＶＱ的码本自适应改进算法，该算法还具有对自适应字表不敏感的特点．     

一种充甲烷无烟煤导电特性的研究

研究了四川白皎无烟煤电导率与甲烷压力和外加电压的关系。煤吸附甲烷后其交流和直流电导率都将增大。在直流电场中,煤的电导率σ与外加电压Ｕ和甲烷压力ｐ 成正比,其双变量方程为σ（ｐ,Ｕ） ＝ １ ．４６４ ＋ ０ ．７０５ｐ ＋ ２．３５５ ×１０－ ３ Ｕ＋ ２ ．９３０ ×１０ － ３ Ｕｐ 或σ（ｐ,Ｕ） ＝ １ ．４８１ｅｘｐ（０ ．３６９７ｐ） ＋ ２ ．５４８ ×１０ － ３ Ｕｅｘｐ（０ ．６８５８ｐ） ;在交变电场中,电导率随甲烷压力的升高而增大,但与外加电压值无关。     

琴律的物理试析暨论琴徽的起源

琴律是三分损益律和纯律的复合律制。古琴的１３个徽位正是两端固定的空弦振动的各分音节点。因此,所谓琴律实质上就是在弦线驻波上取其前六个分音和第八分音再加上三分损益的律制。假定古琴定弦为最普通的一种,即从外到内七弦分别为Ｃ、Ｄ、Ｆ、Ｇ、Ａ、ｃ、ｄ,那么,Ｃ弦的１１徽、８徽,Ｇ弦的１１徽或Ｄ弦的８徽,就可以组成纯律大音阶。萧梁朝丘明的《碣石调幽兰谱》正是这种音阶的应用。同样,Ｃ弦、Ｆ弦和Ｇ弦的１２徽,就可以构成纯律小音阶。对于纯律小音阶是否在古琴中得到应用,尚待古琴谱专家对于留存至今的大量古琴曲的考定与发现。该文还对“徽以玉石”的琴徽的早期文字记载作出考证,指出《淮南子·务训》中“参弹复徽”的“徽”确实是琴徽之意     

The in vitro antiapoptotic effect of dehydroepiandrosterone sulfate in mouse thymocytes and its relation to caspase-3/caspase-6

The effects of dehydroepiandrosterone sulfate (DHEAS) on thymocyte apoptosis induced by dexamethasone (DEX) were investigated. Apoptosis was measured by using agarose gel electrophoresis of DNA, the terminal deoxynucleotidyltransferase (TdT)- mediated dUTP nick end labeling (TUNEL) assay and flow cytometry. Our results showed that preincubation with 1×10⁻⁴ M DHEAS protected thymocytes from DEX-induced apoptosis in vitro. Moreover, we found no blocking effect on the DEX-induced activation of caspase-3 and caspase-6 by the preincubation of thymocytes with DHEAS. This may be interpreted to mean that the antagonism of DHEAS to DEX-induced apoptosis is not related to the activation of these downstream caspases which play a critical role in the execution of apoptosis. Received 25 June 1999; received after revision 1 September 1999; accepted 13 September 1999     

关于D_c(α,β,γ)类映象的不动点定理(英文)

本文研究了D_c(α、β、γ)类映象,得到两个不动点定理和一个稳定性定理,推广了王体翔在文[1]中的结果。     

45,45CrNi钢硫氮碳共渗层组织特性的研究

探讨了45、45 CtNi钢在J-1盐浴中进行无污染硫氮碳共渗的渗层组织及其特性。结果表明,共渗温度、时间以及控制盐浴活性的[CNO~-][S~-]等因素对渗层组织、性能有明显影响。     

自控式双馈电动机的矢量控制

对自控式双馈电动机的矢量控制系统的构成原理及系统所采用的各主要单元的特点及优点进行了论速,本方案适用干连续运行,调速幅度不大的设备,如风机、水泵、连轧机等双馈调速。     

GaAs中准分子激光诱导掺Zn和Si的研究

本文报导了用XeCl激光器实现向半绝缘GaAs衬底掺Zn的实验结果,给出了Zn原子的纵向分布以及掺杂后方块电阻与激光脉冲次数的关系曲线,同时在相同衬底上采用气体源进行了掺Si实验研究.     

马宝成分与结构的分析研究

本文用等离子发射光谱法同时分析了马宝中二十一种无机微量元素,并用X衍射仪进行了结构分析,结果表明,真,伪马宝中无机成分差异较大,结构也有明显区别.