OPC技术及其对工控系统开放性的影响

OPC技术为组成开放式工控系统提供了有效工具,促进了工控系统朝着开放的方向发展.本文在简述OPC技术及其应用背景的基础上,讨论了OPC技术在信息集成中的作用:通过OPC接口实现对现场实时数据的一致访问,实现不同应用软件间的即插即用,实现控制系统的集成与数据共享.     

轻量级开放式移动Agent系统：原理与实现

移动agent计算模式是一种灵活的基于Internet的分布式计算模式，但是“黑盒”式的设计和“单体”结构使得既有移动agent系统过于冗余，且不能随着用户需求和计算环境的变化动态修改系统的结构和行为。因此提出利用反射技术将移动agent系统“构件化”使其能够支持系统的“可定制”或“可裁剪”，并采用开放式的实现为移动agent系统的使用者提供扩展系统的能力。反射架构下的移动agent系统能够在运行时刻无需关闭系统动态加载或卸载特定模块；通过移动agent和底层平台的反射特性能自然地实现agent和agent平台的自适应。遵循这个途径开发了具有反射特性的Artemis-Mogent原型系统，并通过试验示范了新系统应用反射后的效果。     

Designing Internet-Based Payment Systems: Guidelines and Empirical Basis

ABSTRACT

This article describes research into online electronic payment systems, focusing on the aspects of payment systems that are critical for their acceptance by end users. Based on our earlier research and a diary study of payments with an online payment system and with online banking systems of a reputable bank, we proposed a set of 12 interaction design guidelines. The guidelines have been applied during the implementation and redesign of a new payment system. An extensive experimental comparison of the original version of the system with the one designed according to the design guidelines has provided confirmation of the relevance and adequacy of these guidelines for designing online payment systems.     

Uninet SS:支持网络融合和网络开放的软交换系统

讨论了支持网络融合和网络开放的软交换系统的特点，提出了一个层次化的软交换体系结构，包括协议适配子系统、呼叫控制子系统、业务适配子系统和OAM子系统。分析了层次化的呼叫控制模型、基于统一消息的协议适配方法和可扩展的Parlay API实现方案。测试结果表明了该系统能够满足国家标准规定的性能要求。     

Estimating Synergetic Openness of Industrial Enterprise Management Systems

The problem of comprehensive assessment of available enterprise management systems from implementation and application viewpoint is discussed. The degree of information system’s synergetic openness, which described system’s ability to respond to external users’ requests by means of built-in self-organization mechanisms and tools, is offered as an integrated quality index. This complex index depends of partial factors, describing system’s adaptability and integrability. With the help of comprehensive assessment the available ERP systems are compared, and the need in taking into account industrial user’s specific features during system selection is demonstrated.     

Diffusion of General Data on Non-Flat Manifolds via Harmonic Maps Theory: The Direction Diffusion Case

In a number of disciplines, directional data provides a fundamental source of information. A novel framework for isotropic and anisotropic diffusion of directions is presented in this paper. The framework can be applied both to denoise directional data and to obtain multiscale representations of it. The basic idea is to apply and extend results from the theory of harmonic maps, and in particular, harmonic maps in liquid crystals. This theory deals with the regularization of vectorial data, while satisfying the intrinsic unit norm constraint of directional data. We show the corresponding variational and partial differential equations formulations for isotropic diffusion, obtained from an L₂ norm, and edge preserving diffusion, obtained from an L norm in general and an L₁ norm in particular. In contrast with previous approaches, the framework is valid for directions in any dimensions, supports non-smooth data, and gives both isotropic and anisotropic formulations. In addition, the framework of harmonic maps here described can be used to diffuse and analyze general image data defined on general non-flat manifolds, that is, functions between two general manifolds. We present a number of theoretical results, open questions, and examples for gradient vectors, optical flow, and color images.     

蓝牙技术在手机网银和移动支付中的应用

本文简要介绍了USB KEY和蓝牙的技术特点,提供了一种利用蓝牙技术实现在手机等移动设备上完成身份认证密钥功能的方式,把USB KEY的认证方式向移动智能终端上进行了拓展。     

浅析电子支付系统SET存在的问题

本文简单介绍了SET标准在电子支付系统中的使用，并对其存在的主要问题进行了分析。     

PKI技术以及基于PKI的网上支付

PKI是一种公共密钥证书标准,它提供了一种安全的网上支付方式。本文分析了PKI的模型和结构,基于PKI的网上支付过程,最后还分析了基于PKI网上支付的性能。     

用Excel实现系统动力学模型模拟与寻优——以网民扩散为例

以网民扩散为例演示了用Excel实现系统动力学模型模拟与寻优,以及SyntheSim功能的实现方法,指出了Excel不仅能演示系统动力学模拟计算过程,还能与相关专业软件结合更能有效解决问题。     

Terminal Invariance of Stochastic Diffusion Systems

For a controlled stochastic diffusion system, we obtain sufficient conditions for the terminal criterion to be constant with probability one on the assumption of fixed initial state (invariance in perturbations) and sufficient conditions for the terminal criterion to be independent with probability one both from the realization of the random process and the initial conditions (absolute invariance).     

Electronic Commerce and the Banking Industry: The Requirement and Opportunities for New Payment Systems Using the Internet

The potential of the World Wide Web on the Internet as a commercial medium and market has been widely documented in a variety of media. However, a critical examination of its commercial development has received little attention. Therefore, in this paper we propose a structural framework for examining the explosion in commercial activity on the Web. First, we explore the role of the Web as a distribution channel and a medium for marketing communications. Second, we examine the factors that have led to the development of the Web as a commercial medium, evaluating the benefits it provides to both consumers and firms and its attractive size and demographic characteristics. Third, we discuss the barriers to commercial growth of the Web from both the supply and demand side perspectives. This analysis leads to a new classification of commercialization efforts that categorizes commercial Web sites into six distinct types including 1) Online Storefront, 2) Internet Presence, 3) Content, 4) Mall, 5) Incentive Site, and, 6) Search Agent. The first three comprise the "Integrated Destination Site," and the latter three represent forms of "Web Traffic Control." Our framework, argued in the context of integrated marketing, facilitates greater understanding of the Web as a commercial medium, and allows examination of commercial Web sites in terms of the opportunities and challenges firms face in the rush towards commercialization.     

The Intersection of Technology Crimes and Cyberspace in Europe: The Case of Hungary

The revolution in information technologies has changed society fundamentally and will probably continue to do so in the foreseeable future. The development of information technology has given rise to unprecedented economic and social changes that also have a dark side. The new technologies challenge existing legal concepts. Information and communications flow more easily around the world. Borders are no longer boundaries to this flow. Criminals are increasingly located in places other than where their actions produce their effects. However, domestic laws are generally confined to a specific territory. Thus, solutions to the problems posed must be addressed by international law and cooperation, necessitating the adoption of adequate international legal procedures.     

Time-Minimal Control of Dissipative Two-Level Quantum Systems: The Generic Case

The objective of this article is to complete preliminary results from , concerning the time-minimal control of dissipative two-level quantum systems whose dynamics is governed by the Lindblad equation. The extremal system is described by a 3-D-Hamiltonian depending upon three parameters. We combine geometric techniques with numerical simulations to deduce the optimal solutions.      

NAFTA supply chains: facilities location and logistics

North American Free Trade Agreement (NAFTA), the free‐trade agreement between Canada, Mexico and the United States, has caused North American companies to consider inclusion of Mexico in their supply chain. The lower Mexican wages may offset the additional transportation costs; capital‐intensive operations are preferably still done in the United States or Canada. With a consumer base focused in the United States, can an organisation leverage the benefits of NAFTA to their individual advantage? This paper aims to show how, through a real‐world example, overall supply chain costs (total system costs of inventory, transportation and facilities) can be minimised under those circumstances. We formulate and solve a mixed‐integer programming model to find the optimal supply chain for Tectrol Inc., a manufacturer of power supplies. In the first case, components produced in Canada undergo final assembly in the United States, followed by distribution there. The second case is a ‘NAFTA’ supply chain: the Canadian components are converted to sub‐assemblies in Mexico, processed in finishing plants across the US border, then shipped through distribution centres to the final customer. Model solutions indicate in each instance where to locate finishing plants and distribution centres, and how many of each there should be. Results provide Tectrol (hence other manufacturers) some general guidelines on distribution and supply chain decisions in the NAFTA context.     

实时专家系统技术

本文详细介绍了实时专家系统技术的定义、由来、研究方向、应用及其发展,有利于实时专家系统的理论研究及实际应用。     

浅谈RFID技术在手机支付领域中的应用

RFID是无线射频技术,与传统接触式识别方式相比更其方便快捷性.手机支付手段采用RIFD技术,促使作为第三方支付手段的手机支付得到进一步扩展应用.本文介绍了RIFD技术的原理和发展现状,手机支付的简介和RFID技术在手机支付领域中应用,并通过对其国内市场现存发展限制因素的分析来展望RFID手机支付的发展前景.     

The BINAC: A Case Study in the History of Technology

The BINAC, short for Binary Automatic Computer, was developed by John Presper Eckert, Jr. and John William Mauchly during the years 1947-1949 under a contract with the Northrop Aircraft Corporation. It became the first operational stored program computer completed in the United States. This paper provides an historical analysis of the BINAC and the issues relating to its development. It also considers factors relating to the Eckert-Mauchly Computer Corporation and its ultimate acquisition by Remington Rand.     

电子支付系统及其安全技术概述

由于互联网的开放性,使得网上电子支付的安全问题,比传统银行的支付安全问题更严重、更复杂。本文分析了网上电子支付的特点、所存在的问题,介绍了解决网上电子支付安全所采取的安全技术方法。     

电子商务中的身份认证技术及安全支付探析

随着智能化和网络技术的普及与发展,人们日常生活中通过网络购买和交易商品早已成为一种屡见不鲜的现象。但是在电子商务逐步发展的过程中也出现了一系列的安全风险,时刻威胁着人们的财产安全。对此笔者探究了电子商务中身份认证技术及分析了安全问题,并提出了解决策略。