基于ITV平台的Internet服务系统

提出了一种基于有线电视网的因特网服务系统,它依托于正逐渐发展起来的交互式电视服务平台,同时采用视频压缩编码及计算机网络通信等先进技术,可以使普通电视机用户能够使用ＩＴＶ 系统专用的机顶盒方便地完成高速Ｉｎｔｅｒｎｅｔ浏览     

基于自组织映射网络的齿轮故障分类识别

分析了自组织映射网络算法，在U-矩阵方法基础上提出了一种改进的可视化训练结果方法，并应用于齿轮故障的模式识别，研究表明，自组织映射网络能对齿轮状态进行正确分类，有效识别故障模式，改进的可视化方法能更加清楚地显示网络训练结果，两者结合可以扩展应用于机械设备的状态监测和故障识别。     

Electrochemical Characteristics of a Novel Pyridinium Salt as a Candidate Drug Molecule and Its Interaction with DNA

In this article, for the first time, the electrochemical properties of a novel pyridine derivative, 4‐(2‐(2‐hydroxybenzylidene) hydrazinyl)‐1‐(3‐phenylpropyl) pyridinium bromide (abbreviated as 4‐Pyri), and its interaction with double stranded DNA (dsDNA) was investigated. The interaction between candidate drug molecule (4‐Pyri) and dsDNA was analyzed by examining 4‐Pyri (+0.6 V and +0.8 V) and guanine (+1.0 V) oxidation signal changes with Differential Pulse Voltammetry (DPV) and Cyclic Voltammetry (CV). Electrochemical Impedance Spectroscopy (EIS) was used to show the resistance changes before and after the interaction between 4‐Pyri and dsDNA. We showed that after the interaction with 4‐Pyri, the oxidation currents of guanine decreased dramatically, whereas the intrinsic oxidation currents of 4‐Pyri dramatically increased. 4‐Pyri oxidation current differences before and after the interaction with dsDNA enabled us to determine such interaction separately from guanine oxidation signals. In addition, resistance differences were observed at before and after the interaction with each other that confirmed the possible interaction. In addition, toxicity effect (S%) value, which is an important parameter for electrochemical studies indicated 4‐Pyri's toxicity to dsDNA. Our results demonstrated that 4‐Pyri interacts with dsDNA, and could be used as a potential candidate drug molecule due to its remarkable impact on dsDNA.     

下一代制造系统网上质量教育与培训系统

探讨了下一代制造系统网上质量教育与培训的必要性与可行性,提出了基于 Ｉｎｔｅｒｎｅｔ／ Ｉｎｔｒａｎｅｔ技术的网上质量教育与培训系统的总体结构,分析了质量教育与培训的课程内容设置以及教学系统的开发策略．     

一种分布式移动通信身份认证密钥分发协议

提出了一种分布式移动通信身份认证密钥分发协议．基于实体间互不信任假设,采用随机数和单向陷门函数,实现了实体间的分布式身份认证．理论分析表明,它具有双向认证、用户身份保密和安全分区、服务提供与否可仲裁等特点．     

虚拟数控机床体系结构研究

阐述了虚拟数控机床在虚拟制造过程中的意义．通过对虚拟数控机床应具有的功能特点分析,给出了它的体系结构,并给出了原型系统的工作原理图     

War and peace in veto voting

Let I={_i1,…,_in}$I=\{i_1\text{,}\dots \text{,}{i}_n\}$ be a set of voters (players) and A={_a1,…,_ap}$A=\{a_1\text{,}\dots \text{,}{a}_p\}$ be a set of candidates (outcomes). Each voter i∈I$i\in I$ has a preference P_i over the candidates. We assume that P_i is a complete order on A  . The preference profile P={_Pi,i∈I}$P=\{P_i\text{,}i\in I\}$ is called a situation. A situation is called war if the set of all voters I is partitioned in two coalitions K₁ and K₂ such that all voters of K_i have the same preference, i=1,2,$i=1\text{,}2\text{,}$ and these two preferences are opposite. For a simple class of veto voting schemes we prove that the results of elections in all war situations uniquely define the results for all other (peace) situations. In other words, the results depend only on the veto (or effectivity) function. We give several other examples from game (and from graph) theory with the same property.     

Candidate groups search for K-harmonic means data clustering

Clustering is a very popular data analysis and data mining technique. K-means is one of the most popular methods for clustering. Although K-mean is easy to implement and works fast in most situations, it suffers from two major drawbacks, sensitivity to initialization and convergence to local optimum. K-harmonic means clustering has been proposed to overcome the first drawback, sensitivity to initialization. In this paper we propose a new algorithm, candidate groups search (CGS), combining with K-harmonic mean to solve clustering problem. Computational results showed CGS does get better performance with less computational time in clustering, especially for large datasets or the number of centers is big.     

利用概率增进树和路径形态学的遥感道路条带提取

针对高分辨率遥感影像复杂道路提取难题,提出一种利用概率增进树和路径形态学的遥感道路条带提取方法。通过一维Gabor滤波器提取道路角度纹理特征,融合光谱特征构建特征矢量。设计训练样本数据集,利用概率增进树算法提取道路候选点。针对具有一定曲率的复杂道路,兼顾直线和弯曲道路,设计4个主方向邻接图检测线状或条带状道路,改进二值路径形态学为概率路径形态学剔除大多数非道路点。针对小面积噪声和条带孔洞问题,采用数学形态学的方法弥补条带孔洞,得到完整道路条带。结果表明:提取道路条带的准确率达到了88.99%,提取结果较为理想。     

Single-strand conformation polymorphism analysis of candidate genes for reliable identification of alleles by capillary array electrophoresis

We investigated the reliability of capillary array electrophoresis-single strand conformation polymorphism (CAE-SSCP) to determine if it can be used to identify novel alleles of candidate genes in a germplasm collection. Both strands of three different size fragments (160, 245 and 437 bp) that differed by one or more nucleotides in sequence were analyzed at four different temperatures (18 degrees C, 25 degrees C, 30 degrees C, and 35 degrees C). Mixtures of amplified fragments of either the intron interrupting the C-terminal WRKY domain of the Tc10 locus or the NBS domain of the TcRGH1 locus of Theobroma cacao were electroinjected into all 16 capillaries of an ABI 3100 Genetic Analyzer and analyzed three times at each temperature. Multiplexing of samples of different size range is possible, as intermediate and large fragments were analyzed simultaneously in these experiments. A statistical analysis of the means of the fragment mobilities demonstrated that single-stranded conformers of the fragments could be reliably identified by their mobility at all temperatures and size classes. The order of elution of fragments was not consistent over strands or temperatures for the intermediate and large fragments. If samples are only run once at a single temperature, small fragments could be identified from a single strand at a single temperature. A combination of data from both strands of a single run was needed to identify correctly all four of the intermediate fragments and no combination of data from strands or temperatures would allow the correct identification of two large fragments that differed by only a single single-nucleotide polymorphism (SNP) from a single run. Thus, to adequately assess alleles at a candidate gene locus using SSCP on a capillary array, fragments should be < or =250 bp, samples should be analyzed at two different temperatures between 18 degrees C and 30 degrees C to reduce the variability introduced by the capillaries, data should be combined from both strands and both temperatures, and undenatured double-stranded (ds)DNA molecular weight standards, such as ROX 2500, should be included as internal standards.