一种混联式混合动力驱动系统的性能分析

对一种混联式混合动力驱动系统建立了相应的分析模型，并结合6600型中巴车对该驱动系统和整车的性能进行了理论分析；简要论述了该系统的工作机制和控制策略。与内燃机及纯电动汽车的性能进行了对比，为混合动力系统的实际应用提供了理论依据。     

截割性能的试验研究

文章介绍了单刀截割试验的原理和方法，并根据试验的结果分析了各种参数对截割性能的影响．所得结论对采煤机和掘进机工作机构的设计具有指导作用。     

On the use of ordered sets in problems of comparison and consensus of classifications

Ordered set theory provides efficient tools for the problems of comparison and consensus of classifications Here, an overview of results obtained by the ordinal approach is presented Latticial or semilatticial structures of the main sets of classification models are described Many results on partitions are adaptable to dendrograms; many results on n-trees hold in any median semilattice and thus have counterparts on ordered trees and Buneman (phylogenetic) trees For the comparison of classifications, the semimodularity of the ordinal structures involved yields computable least-move metrics based on weighted or unweighted elementary transformations In the unweighted case, these metrics have simple characteristic properties For the consensus of classifications, the constructive, axiomatic, and optimization approaches are considered Natural consensus rules (majoritary, oligarchic, ) have adequate ordinal formalizations A unified presentation of Arrow-like characterization results is given In the cases of n-trees, ordered trees and Buneman trees, the majority rule is a significant example where the three approaches convergeThe authors would like to thank the anonymous referees for helpful suggestions on the first draft of this paper, and W H E Day for his comments and his significant improvements of style     

一种基于近邻搜索的快速k-近邻分类算法

针对传统快速k 近邻分类算法的缺陷 ,提出了一种基于近邻搜索的快速k 近邻分类算法———超球搜索法。该方法通过对特征空间的预组织 ,使分类在以待分样本为中心的超球内进行 ,有效地缩小了搜索范围。实验结果表明 ,在相同识别率和k值的情况下 ,超球搜索法的识别速度优于基本k 近邻法和传统快速k 近邻算法———及时终止法 ,而且不存在对训练样本搜索顺序敏感性的问题     

Optimal Control of Teaching Process

It is clearly illustrated in[1 ] ,the quantity analysis of the dynamic process of teachingeffects has been clearly illustrated in the first reference,according to which we areinformed of the mathematic model of the teaching process;the function of teachers dwingthe process;as well as the influere on the process of comprehending ofthe students causedby several different functions.But that confines in the specific relationship betweenteaching and learly as far as a single different class,a concre…     

Genome size variation of rhizobia

Summary Slow-growing species ofRhizobium have a genome size almost double that of the fast-growing species. This provides additional support in favor of their being placed in separate genera.     

甲骨文计算机识别方法研究

甲骨文是中国最古老的一种象形文字，富有绘画的特点，因此不能用目前识别汉字的方法进行识别。该文提出一种两级分类的识别程序设计方法：首先，将街识字符抽象为一种图，并其拓扑特征进行了第一级识别；然后，给出一种广义笔划定义，并在此基础上提取有关的特征进行第二级识别。初步实验表明，识别率达９４％。     

Nucleotide binding domains of human CFTR: a structural classification of critical residues and disease-causing mutations.

Defective function of the cystic fibrosis (CF) transmembrane conductance regulator (CFTR) causes CF, the most frequent lethal inherited disease among the Caucasian population. The structure of this chloride ion channel includes two nucleotide-binding domains (NBDs), whose ATPase activity controls channel gating. Recently, the experimental structures of mouse and human CFTR NBD1 and our model of the human CFTR NBD1/NBD2 heterodimer have provided new insights into specific structural features of the CFTR NBD dimer. In the present work, we provide a structural classification of CF-causing mutations which may complement the existing functional classification. Our analysis also identified amino acid residues which may play a critical role in interdomain interaction and are located at the NBD1-NBD2 interface or on the surface of the dimer. In particular, a cluster of aromatic amino acids, which includes F508 and straddles the two NBDs, might be directly involved in the interaction of the NBD1/NBD2 heterodimer with the channel-forming membrane-spanning domains.Received 24 May 2005; received after revision 13 June 2005; accepted 18 June 2005     

二热源制冷机的（εR）max

指出二热源制冷机的制冷系数ε与制冷率R 的乘积εR存在最大界限(εR)_(max)。它是制冷机的一个重要性能参数。讨论了三种不同情况下(εR)_(max)的主要特征,所得结果将有助于对实际制冷机各种性能界限的进一步了解,并可对制冷机最佳工作状态的选择提供一些新的理论依据。     

殷占忠1,2,张素峰1,孙源1,王立功1

基于Opensees程序对原框架和增设改进型双钢管约束屈曲支撑进行加固的钢框架进行Pushover分析和非线性时程分析,对两者的抗震性能进行比较。得出以下结论：加固后的钢框架刚度和强度明显提高,顶层侧移比减小而底部剪力比增加较小;地震作用下,加固后的框架破坏程度远小于原框架,所产生的塑性铰主要集中在中间跨梁和支撑处,避免了其它构件发生破坏。说明对原框架增设改进型双钢管约束屈曲支撑进行加固,可提高结构的抗震性能。