SLE4442 IC卡在自动加油机控制系统中的安全设计

SLE 4442 逻辑加密存储卡的加密机制依赖的只是保存在IC卡中的几位固定数字组成的卡密码，其抗破译和窃取的能力与应用系统的安全设计有着非常紧密的关系，本文以SLE4442 IC卡为具体研究对象，通过对其安全性进行分析，采用DES加密算法，系统全面地设计了一种逻辑加密卡安全应用体系，并将其应用在IC卡自动加油机控制系统中。     

USB技术及其在工业测控中的应用

介绍了USB技术的基本特点、传送方式和应用优势，并且简要说明USB技术在工业测控中的引入原因、应用思路和前景。     

Classifying and detecting anomalies in hybrid knowledge-based systems

The increasing need for hybrid Knowledge-Based Systems (KBS) that accommodate more complex applications has led to the need for new verification concerns that are more specific to the hybrid representation using objects and rule-based inference. Traditionally, verification of expert systems has focused solely on rule-based inference systems. Hybrid KBSs present additional verification problems not found in traditional rule-based systems. This paper is an investigation into the anomalies that may be present in a hybrid representation that warrant detection for the verification of the KBS. Many anomalies are due to the interaction of the component parts of the hybrid KBS. For example, subsumption anomalies arise due to an interaction between inheritance of objects and rule-based inference. In this paper, we extend the context of subsumption anomalies and introduce additional types of anomalies that may be present in the KBS. The goal of this research is to make hybrid KBSs more reliable by detecting such anomalies.     

CVT中阻尼器的研究

阐述了电容式电压互感器的各种阻尼器的优缺点,并对速饱和阻尼器设计进行了详述,提出了CVT设计速饱和阻尼器应注意的事项。     

常温生长类金刚石薄膜的实验研究

利用射频等离子体增强化学气相沉积(RFPECVD)工艺在常温下实现在不锈钢、硅片、玻璃等基底上大面积沉积类金刚石(DLC)膜.薄膜表面光滑致密,与衬底的结合力较高.用Raman,FTIR,SEM,EDX研究了薄膜的形貌、结构与组分.用栓-盘摩擦磨损试验机测试了薄膜的摩擦系数.通过优化沉积参数,所沉积的DLC膜在与100Cr6钢球对磨时摩擦系数低于0.01.在摩擦过程中DLC膜的磨损机制借助SEM进行了研究.     

真空精炼系统故障诊断的模糊聚类分析

大型真空冶金系统 (DVMS)的故障点多、故障现象与故障原因间对应关系复杂 ,很难从抽气机理上来精确地进行故障诊断。DVMS工艺要求能对该设备进行快速、准确的故障诊断。为此 ,介绍了一种基于模糊聚类算法的智能诊断模型。该模型具有很强的自学习、自组织能力 ,适用于大型复杂真空系统的故障诊断。以RH KTB真空冶金系统的智能故障诊断为例 ,给出了真空冶金系统模糊故障诊断的实际过程。通过分析证实了该算法对大型复杂真空冶金系统智能故障诊断的有效性     

烟草销售企业供应链系统分析与设计

随着现代信息技术的发展，现代企业之间的竞争不再是单一企业之问的竞争，而是企业供应链之间的竞争，供应链管理可以将核心企业内外部资源统筹优化配置，扩展资源配置范围，同时也可以最大限度地消除中间环节，节省交易费用．在分析了中国烟草销售企业特点的基础上，针对烟草销售企业存在的问题，应用供应链的思想，进行系统设计，最后以深圳烟草公司供应链系统为例，对烟草销售企业供应链系统功能、结构及系统关键技术进行了说明．     

一种基于V-I特性的节点电压稳定快速判断方法

将简单系统基于V-I特性的电压稳定判别法成功地应用于复杂系统,推导出了判断负荷节点静态电压稳定性的公式。只需对系统进行两次常规潮流计算,即可根据公式迅速判断系统每一个节点的电压稳定性,同时计算出各个节点的电压稳定裕度。该方法简单、快速,可用于实时在线判断电压稳定性、确定系统的薄弱节点和薄弱区域,为分析控制电压稳定提供指导。系统算例验证了该方法的有效性。     

Three-dimensional imaging of human stem cells using soft X-ray tomography

Three-dimensional imaging of human stem cells using transmission soft X-ray tomography (SXT) is presented for the first time. Major organelle types—nuclei, nucleoli, mitochondria, lysosomes and vesicles—were discriminated at approximately 50 nm spatial resolution without the use of contrast agents, on the basis of measured linear X-ray absorption coefficients and comparison of the size and shape of structures to transmission electron microscopy (TEM) images. In addition, SXT was used to visualize the distribution of a cell surface protein using gold-labelled antibody staining. We present the strengths of SXT, which include excellent spatial resolution (intermediate between that of TEM and light microscopy), the lack of the requirement for fixative or contrast agent that might perturb cellular morphology or produce imaging artefacts, and the ability to produce three-dimensional images of cells without microtome sectioning. Possible applications to studying the differentiation of human stem cells are discussed.     

互联电网运行控制性能评价标准研究(三)新标准的指标设计

基于所提出的评价标准新构架和3个标准的设计思想,针对中国电网运行具体实际,对各标准指标的构造进行了理论探索,给出了3个标准的指标备选方案。其要点是:将行业标准中频率合格百分数指标转化为概率指标,以适应中国的电网质量考核方式;针对频率安全的实际关注点,设计积分型的频率安全标准指标形式,并给出了离散采样情况下的指标样式;无意交换电量标准中时段长度可选,可适应不同的结算时间尺度;对所设计的各项标准的重合度进行分析,明确了各标准同时设置的必要性。