基于LTSA标准的应用软件远程教学系统

本文在详细研究IEEE P1484．1标准草案的基础上，提出了一个新的远程软件教学系统(EPSS)。嵌入浏览器的客户端应用程序通过DCCOM与远端服务器通信，学习者在服务器的监控和指导下完成应用程序相关功能的学习。系统最大的特点是将LTSA体系结构应用于实际。最后，简要介绍了一系统用到的DCCOM、钩子、屏幕取词等几项关键技术。     

谈远程网络监控技术

在远程网络监控当中，最能体现整个系统功能以及一些增值服务多由后端软件来实现，因此，软件在整个系统中非常重要。鉴于此，本文重点探讨了基于视频服务器架构的大中型集中监控管理系统软件目前逐渐呈现出来的一些特征。[编者按]     

基于嵌入式Web服务器的电源屏监控系统

设计了一种实现远程检测控制电源设备目的的嵌入式系统。该监控系统通过A/D转换和GPIO接口测量电源设备参数进行数据采样。嵌入式系统作为Web服务器，通过Internet在电源设备和远程监控终端之间传送检测和控制信息。讨论的嵌入式系统以采用µC/OSII操作系统为特色，满足设备检测实时性的要求。讨论了嵌入式Web服务器的硬件与软件构架。     

基于嵌入式Web的远程数据监控系统研究

针对传统监控方案中PC监控服务器及C/S监控模式的弊端,设计了一种基于B/S模式,以嵌入式系统为服务器的远程监控解决方案。采用TI高性能处理器TMS320DM6446为硬件核心,嵌入式Web服务器为软件核心,综合嵌入式软硬件开发技术,开发了本监控系统。服务器端数据库接收存储下位机采集发送过来的各种现场数据,Web服务器通过CGI程序调用显示,同时可以发送控制指令。远程客户端通过Web实时监控现场数据。测试结果表明,该系统运行稳定,操作方便,达到了预期目的。     

基于嵌入式Web的远程实时监控技术研究

在对已有远程监控系统实现方法进行分析的基础上,提出了远程监控系统的体系结构、硬件结构和软件模型,研究了嵌入式系统接入Internet的解决方案.该方案采用低端嵌入式设备作为开发平台,无需移植操作系统通过编程构造了嵌入式Web服务器,从而实现了远程监控功能.     

计量泵远程监控组态软件设计

计量泵被广泛应用于流体工业中,结合具体的计量泵网络化监控系统,为实现在上位机端对工业现场计量泵的远程监控和协调调度设计了一套软件系统。软件主要由数据服务器和可视化监控组态平台组成。数据服务器是监控软件与现场数据的交换中介;监控组态软件是主要的人机交互接口,直观地再现工控现场。数据服务器采用Java开发,包括通信实现、数据分析和交换、数据管理等功能模块;监控组态平台采用Qt开发,分为节点组态、矢量制图、属性组态、操作组态、策略组态等模块,着重实现图形界面系统组态模块。调试结果表明,该软件系统能够应用于计量泵远程监控系统中。     

Wonderware软件在远程监控系统的应用

本文针对某大型制造型企业信息化建设,利用Wonderware公司系列软件构建了一个基于Web技术的远程监控系统,给出了系统的总体结构框图,阐述了系统中服务器的构成和远程监控软件的设计,分析了系统通信的原理.该系统解决了企业中形成的各种类型的"信息化孤岛"问题.     

LonWorks监控系统的结构研究

对LonWorks监控系统的客户／服务器结构、浏览器／服务器结构进行了研究。其中客户／服务器结构包含了性能与应用不同的本地Client、远程Full Client及远程Light Weight Client三种监控模式。结合实例对监控系统的几种结构及其优缺点进行了分析与讨论。结果表明，只有正确地使用LonWorks技术，选择合适的监控系统结构，才可建立符合需要的监控系统。     

基于Web的远程视频监控系统在自动化中的设计与应用

本文阐述了视频监控系统的发展,对基于Web服务器的远程视频监控系统进行的详细研究,并对相关的技术进行了深入的探讨,设计出了基于Web的远程视频监控系统在自动化中的应用系统。     

机房环境设备的远程监控系统设计

结合机房环境设备的管理需要，分析了远程监控系统的特点，提出基于嵌入式Web服务器的远程监控系统设计思路、体系架构方法。结合CGI程序的设计，着重探讨了嵌入式Web服务器的实现方法。     

A New Model of Computation for Learning Vision Modules from Examples

This paper addresses an important class of mimicry problems, where the goal is to construct a computer program which is functionally equivalent to an observed behaviour. Computer vision research can be considered such a challenge, where a researcher attempts to impart human visual abilities to a computer. Unfortunately this has proved a difficult task, not least because our vision processes occur mostly at a subconscious level. It is therefore useful to study the general mimicry problem in order to develop tools which may assist computer vision research.This paper formalises a mimicry problem as one in which a computer learning system (L) constructs a solution from a given program structure (i.e. template or outline) by posing questions to an Oracle. The latter is an entity which, when given an input value, produces the corresponding output of the function which is to be mimicked.In order to define a program's structure, particularly one which can be extracted from any computer program automatically, a new model of computation is developed. Based on this a fast algorithm which determines the best questions to pose to the Oracle is then described. Thus L relieves the human programmer of the difficulties faced in choosing the examples from which to learn. This is important because a human programmer might inadvertently choose biased, redundant or otherwise unhelpful examples. Results are shown which demonstrate the utility of a complete learning system (L) based on this work.This paper represents background theory and initial algorithms which further work will extend into powerful automatic learning systems, examples of which are found in [36] and [38].     

一种基于市场机制的计算网格资源分配方法

针对计算网格提出了一种基于市场机制的资源分配方法，以一般均衡理论为基础，依靠市场机制，实现计算网格资源的优化分配，首先，描述了基于代理的资源分配框架，它包括3个 层次：资源层、代理层和用户层；接着，给出了计算网络资源分配的市场模型，其中效用函数用于刻画用户对给定资源的满意程度；然后定义了市场模型的均衡状态并证明了均衡状态撮优性，这意味着在均衡状态下资源分配不仅有效而且公平，最后引入了资源代理的迭代算法。     

An Adaptive Method for Area Light Sources and Daylight in Ray Tracing

This paper proposes an adaptive method for taking both (diffuse or not) planar area light sources and daylight into account in a ray tracing environment which separates the calculation of direct and indirect illumination. In a given point, direct illumination due to a light source or to natural light is represented by a vector, the direction and magnitude of which being computed through an adaptive area approach, which is driven by the solid angle according to which a part of the source is seen from the current point. In the case of unoccluded diffuse polygonal sources, an analytical formula is used which gives an exact value for this vector.     

An Order-Based Theory of Updates for Closed Database Views

The fundamental problem in the design of update strategies for views of database schemata is that of selecting how the view update is to be reflected back to the base schema. This work presents a solution to this problem, based upon the dual philosophies of closed update strategies and order-based database mappings. A closed update strategy is one in which the entire set of updates exhibit natural closure properties, including transitivity and reversibility. The order-based paradigm is a natural one; most database formalisms endow the database states with a natural order structure, under which update by insertion is an increasing operation, and update by deletion is decreasing. Upon augmenting the original constant-complement strategy of Bancilhon and Spyratos – which is an early version of a closed update strategy – with compatible order-based notions, the reflection to the base schema of any update to the view schema which is an insertion, a deletion, or a modification which is realizable as a sequence of insertions and deletions is shown to be unique and independent of the choice of complement. In addition to this uniqueness characterization, the paper also develops a theory which identifies conditions under which a natural, maximal, update strategy exists for a view. This theory is then applied to a ubiquitous example – single-relational schemata constrained by equality-generating dependencies. Within this framework it is shown that for a view defined as a projection of the main relation, the only possibility is that the complement defining the update process is also a projection, and that the reconstruction is based upon functional dependencies.     

ROBOT_S: An interactive robot simulation language

While it may not be practical to realize a tentative robot design as an actual robot, there is no question of the practicality of a simulation, ROBOT_S is a program in which the foundation for a comprehensive simulation environment is laid. A graphical robot is created to which physical attributes may be assigned, and whose movement may be dictated by a user-installed dynamic model and control law. A simple robot command language has been developed, by which the manipulator may be commanded to move, during which simulation data of state variables is collected and graphed.     

宽温度压阻式传感器的热灵敏度漂移补偿

介绍了压阻式传感器的灵敏度温度补偿原理 ,给出了一种在宽温度范围内采用了分段补偿方式进行灵敏度温度补偿的方法 ,实现了宽温度范围内较高的补偿准确度。这里介绍的方案是通过数 -模组合硬件电路实现分段补偿 ,具体方案是基于目前国内外OEM硅压力传感器厂商采用的固定电阻器并联补偿法。技术途径是设计一组温控开关电路来控制并联电阻器是否接入 ,温度信号来源于恒流源供电下的传感器桥压信号。此方法硬件电路及补偿计算均较简单 ,适用于较宽的温度环境 ,性能价格比合理。同时便于扩展为多段补偿以实现高补偿准确度 ,并且传感器在快速温变环境下工作时温度跟踪误差小。     

Reuse-based software production technology

Software reuse is viewed as a key technology to improve software product quality and productivity. This paper discusses a series of technologies related with software reuse and software component technology: component model, which describes component's essential characteristics; component acquisition technology, of which domain engineering is the main approach; component management technology, of which component library is the kernel; application integration and composition technology, of which application engineering is the main approach; software evolution technology, of which software reengineering is the main approach, etc. This paper introduces the software development environment: JadeBird Software Production Line System, which effectively integrates the above-mentioned technologies.     

Distributed self-healing control in SONET

This paper proposes a distributed self-healing architecture which contains two self-healing techniques. In this proposal, a path restoration by Self-Healing Ring (SHR) and a path restoration by Dynamic Self-Healing (DSH) algorithm are jointly applied in a network. In the architecture, SHR is applied for a part of a path which is terminated by an Add-Drop Multiplexer (ADM), and DSH is applied for another part of a path which is terminated by two Digital Cross-Connect Systems (DCSs). Based on the architecture, DSH can be applied for a part of a path which is terminated by an ADM. Next, a network design algorithm is described in order to optimize the amount of spare capacity. As a result, spare capacity reduction is realized by using the algorithm for a network where the proposed architecture is applied.     

绘制规则离散点等值线的一种算法

提出一种绘制规则离散点的等值线的算法，在以搜索到的测点为中心的一个矩形区域内搜索下一点，与过去已搜索到的测点所确定的2次B样条曲线的切线距离最小的点为等值线的下一点，把所有搜索到的点拟合成3次B样条曲线则得等值线。     

Linear periodic controller design for decentralized control systems

In the decentralized control of linear time-invariant (LTI) systems, a decentralized fixed mode (DFM) is a system mode which is immoveable using an LTI controller, while a quotient DFM (QDFM) is one which is immoveable using any form of nonlinear time-varying compensation. If a system has no unstable DFMs, there are well-known procedures for designing an LTI stabilizing controller; for systems which have unstable DFMs but no unstable QDFMs, we provide a simple design algorithm which yields a linear periodic sampled-data stabilizing controller.