MPEG-7及其应用

MPEG－7是国际MPEG组织正在制订定的第4个MPEG标准,旨在实现多媒体内容描述的标准化。简要介绍了MPEG－7的应用背景、目标、内容及常用术语,并探讨了MPEG－7可能的应用领域。     

一种检测绝缘纸板微水分的电容式传感器

开发一种用于检测变压器绝缘纸板微水分的电容式传感器 ,该传感器通过感应绝缘纸板的介电常数在其干燥过程中的变化而用于在线实时检测。它灵敏度高、温度漂移小、便于安装和信号传送 ,其输出信号经处理后 ,可由微机处理并显示水的质数分数。介绍了传感器的工作原理、结构形式及相关系统。     

基于图的谱分割技术的面向对象软件系统分解*

主要是以一种带权类依赖图作为面向对象系统的UML类图的抽象表示,其中类依赖图的各边上权值对应于类图中的相应关系。针对带权类依赖图运用代数图论中图的Laplace谱的连通特性以迭代分割的方式对其进行划分,得到所需开发的系统构件。通过实验表明,该方法是一种有效的面向对象软件系统分解方法,并且分解所得到的构件具有较高的内聚性。     

CAN总线技术在汽车视觉检测系统中的应用

本根据汽车白车身视觉检测站工作的特点和需要,对基于CAN总线的多主结构分布控制系统进行了研究,并组建了基于MC68HC05X16单片机和微机的控制网络,中对CAN总线物理层接口、拓扑结构、通令协议及规程等作了详细的说明。     

拙政园虚拟巡游系统

介绍了拙政园动画及虚拟系统的形成过程,以及如何在现有的软硬件设备下,将虚拟现实辅助于建筑方案中。     

供应链集成化模型与优化

本文建立了一个包括供应商、制造商、销售商 在内的集成化模型,这一模型含有线性状态方程和神经网络非线性模型,提出了库存成本、 供应成本、生产水平等在内的供应链目标函数和约束条件．对于供应链集成化模型采用模拟 退火方法进行优化,并以辽化公司为背景进行了初步条件的仿真工作．     

Dynamic view selection for time-varying volumes

Animation is an effective way to show how time-varying phenomena evolve over time. A key issue of generating a good animation is to select ideal views through which the user can perceive the maximum amount of information from the time-varying dataset. In this paper, we first propose an improved view selection method for static data. The method measures the quality of a static view by analyzing the opacity, color and curvature distributions of the corresponding volume rendering images from the given view. Our view selection metric prefers an even opacity distribution with a larger projection area, a larger area of salient features' colors with an even distribution among the salient features, and more perceived curvatures. We use this static view selection method and a dynamic programming approach to select time-varying views. The time-varying view selection maximizes the information perceived from the time-varying dataset based on the constraints that the time-varying view should show smooth changes of direction and near-constant speed. We also introduce a method that allows the user to generate a smooth transition between any two views in a given time step, with the perceived information maximized as well. By combining the static and dynamic view selection methods, the users are able to generate a time-varying view that shows the maximum amount of information from a time-varying data set.     

A base62 transformation format of ISO 10646 for multilingual identifiers

ISO 10646 Universal Character Set (UCS) is a 31‐bit coding architecture that covers symbols in most of the world's written languages. Identifiers in programming languages are usually defined by using alphanumeric characters of ASCII, which represent mainly English words. An approach for working around this deficiency is to encode multilingual identifiers into the alphanumeric range of ASCII. For case‐sensitive languages, an encoding that utilizes [0–9][A–Z][a–z] can be more space‐efficient for multilingual identifiers. This paper proposes a base62 transformation format of ISO 10646 called UTF‐62. The resulting string of UTF‐62 is within a [0–9][A–Z][a–z] range, a total of 62 base characters. UTF‐62 also preserves the lexicographic sorting order of UCS‐4. Copyright © 2001 John Wiley & Sons, Ltd.     

Response to ‘Comments on: A cohesion measure for object‐oriented classes’

Indicating that CBMC does not satisfy the monotonic property in terms of the number of interactions, Xu and Zhou proposed an augmented definition of CBMC by adopting cut set instead of glue methods. The augmented CBMC clearly satisfies the monotonic property. However, CBMC is designed to overcome the problem with respect to the number of interactions and, therefore, focuses on the interaction pattern, especially, member connectivity. Consequently, it does not make sense to mention the monotonic property of CBMC with respect to interaction number. Moreover, the notion of glue methods allows several interpretations on the design quality of a class. However, that meaningful interpretation is not possible for the augmented definition due to the removal of the notion of glue methods. Copyright © 2001 John Wiley & Sons, Ltd.     

8088/8086汇编语言中宏的编制和使用

介绍8088／8086汇编语言中宏的编制和使用方法以及宏与子程序的区别。