图形式档案录入系统的设计与实现

随着信息社会的到来和电子政务在我国的普及,信息系统的建设成为当今一个十分重要的研究课题.如何提高档案管理的效率和档案信息的利用率,是档案管理机构所面临的一个重要任务.在分析图形式档案录入系统功能的基础上,采用浏览器/服务器的设计模式,使用动态网页设计技术,对图形式档案录入系统进行了设计和开发,给出了系统数据库中各数据表的设计结果和图形式档案录入系统部分录入界面及其ASP源代码,达到了图形式档案录入系统设计和开发的目的和要求.     

Determination of peak distortion for filtered mass spectrometer data

The design procedure along with design curves for specifying the design of analog and digital filters for mass spectrometer data is presented. In developing the procedure, careful attention is given to noise models so that the two filter classes can be compared. The use and benefits of interactive graphics and computer-aided design software for implementing the design procedures are discussed.     

基于MATLAB的快速图形化数据处理软件设计

针对科研和工程实际中大量数据需要快速处理并直观显示的需求,给出了一种利用MATLAB实现快速图形化数据处理的技术途径.介绍了MATLAB的句柄图形系统,及利用GUIDE图形化开发环境进行用户界面设计的主要过程,以及如何对相应的M脚本文件进行编程实现应用逻辑的方法及其要点,并给出了一个有参考价值的应用例子及设计过程中的一些重要细节.     

县级城镇CATV系统工程总体技术方案

改造CATV网络系统必须有一个规范的设计方案，对网改设计方案进行探讨，提出网络设计的依据和原则、规划思路和技术方案以及安全性能要求，使网络改造后能有效地开展多功能服务。     

信号与系统仿真实验的研究

传统的实验手段无法全面的反映“信号与系统”课程中的许多基本理论,特别是非周期信号的时域与频域分析、基本运算性质、系统的设计与实现等。本文展开了计算机仿真和虚拟实验的研究,力求用形象生动的二维、三维图形表现形式,加深学生对“信号与系统”课程理论的理解。     

动态统计图控件的设计与实现

在数据库应用开发中,统计图控件能够将数据以图形的方式表现出来,微软提供了一些基本控件,但目前大部分统计图控件生成的统计图是静态的。本设计使用Visual C 6.0实现了一个动态统计图控件,其功能是从数据库中读出数据,经过处理,最终以动态图的形式表现出来,解决了统计图的动态显示问题。     

The Language of Visuals: Text + Graphics = Visual Rhetoric Tutorial

Technical communication textbooks tend to address visual rhetoric as two separate units, usually a chapter on document design and then a chapter on graphics. We advocate teaching a unified system of visual rhetoric that encompasses both text and graphics within a common visual-language system. Using C. S. Peirce's three-part theory of rhetoric and his ten categories of sign, we offer an integrated semiotic system, interpreting in one model the effectiveness of graphics, document design, and formatting, all considered as subtypes in this proposed visual rhetoric, organized around three primary communication goals: to decorate, to indicate, and to inform. Thus, any evaluation of visuals, either textual or graphic, must be made with reference to rhetorical contexts in which audience needs and graphic/textual media choices should align with authorial goals     

地址数据复用型Flash存储器测试技术研究

随着半导体技术的迅猛发展,移动存储设备快速增长。Flash芯片作为移动存储设备中最常用的器件,得到了日趋广泛的应用,对Flash芯片的测试要求也越来越高。地址数据复用型Flash存储器测试技术研究及电路设计,设计改善大规模数字集成电路测试系统数字系统算法图形功能。对K9F2G08R0A进行了测试并通过对数字系统算法图形功能进行改善,算法图形发生器由多个算术逻辑单元、多路选择器以及操作寄存器组成,可以实现复杂的逻辑操作和算术运算,可以更快、更简便地对地址复用型Flash存储器进行测试,减少测试程序开发难度。     

CALCE/RAMCAD for Electronics

The University of Maryland's Computer Aided Life Cycle Engineering (CALCE) research effort is aimed at developing techniques for design, analysis, prediction, and optimization of electronics with respect to a variety of design goals. Performance, producibility, reliability, maintainability, life-cycle cost, safety, etc., are the design criteria which are being integrated through the application of interactive heuristic and algorithmic design optimization techniques. The University of Maryland Reliability and Maintainability Computer-Aided Design (RAMCAD) research is CALCE and is focused on second- and third-level electronic package design with respect to interfacing thermal, mechanical, and reliability analysis. The goal is to make reliability and maintainability an integral, real-time, and upfront part of the design process, such that the need to resubmit designs will be eliminated. The motivation behind this project was the fact that schedule constraints are often compromising the effectiveness and efficiency of the design process. To achieve the goal of CALCE/RAMCAD, a cohesive and extensible design environment for analysis and tradeoff tools was developed. A system executive controller that integrates tools for analysis while providing system transparency, design data management, and process management was developed to guide the user through the design process and provide direct access to the design tools. These developments required the integration of computer-aided design (CAD), artificial intelligence (AI), and decision support (DS) techniques. Attention to human factors and the use of interactive graphics were also instrumental in the development.     

Data-Hiding Codes

This tutorial paper reviews the theory and design of codes for hiding or embedding information in signals such as images, video, audio, graphics,and text. Such codes have also been called watermarking codes; they can be used in a variety of applications, including copyright protection for digital media, content authentication, media forensics, data binding, and covert communications. Some of these applications imply the presence of an adversary attempting to disrupt the transmission of information to the receiver; other applications involve a noisy, generally unknown, communication channel. Our focus is on the mathematical models, fundamental principles, and code design techniques that are applicable to data hiding. The approach draws from basic concepts in information theory, coding theory, game theory, and signal processing,and is illustrated with applications to the problem of hiding data in images.     

The challenge of computer graphics in continental western Europe

Computer graphics applications, software, and hard-ware research, are examined and evaluated in Continental Western Europe. Growth has been slow. The reasons are the high cost of hardware and the complexity of the required software. The past reveals a rather dim picture. Mechanical engineering applications have shown some promising success. Electrical engineering applications have been effective mainly for PCB and IC mask layout only. Interactive graphic software has not yet effectively found its way outside Fortran. APL-G seems an interesting graphic extension of the language APL. Promsing trends appear to be on the horizon. They are related to hardware and software tradeoffs, as, for example, in the TALENT System. The need for computer graphics still exists. The hardware and software tradeoffs will receive more attention. Success in computer graphics will depend upon advances in computer systems design, especially programming languages and systems. Computer graphics has yet to come of age.     

Through the looking glass: the synthesis of computer graphics andcomputer vision

In one abstract view, computer graphics deals with building computer models or representations and then displaying them by some method or theory to produce a high-quality image. Computer vision is a dual to computer graphics. It starts with an image or animation and deduces the model representation for the computer. Computer graphics goes down from model to image, and computer vision goes up from image to model. This is, of course, a simplification, but it serves as a good basis to understand recent developments intersecting the two fields. Computer graphics and computer vision are truly complementary disciplines quickly approaching convergence. The broad study of computer-based imagery extends beyond these two fields to include the areas of human-computer interaction, visualization and image processing. Ongoing research and development will continue to forge this bond, and we'll begin to see real-world products emerge from these efforts. Then we will see the fruits of this convergence     

人体可视化研究

人体可视化是指运用计算机图形学和图形处理技术,将抽象的人体数据转换为图形及图像在屏幕上显示出来并进行交互处理的理论、方法和技术。目前的许多应用已经显示出它在医学领域的巨大发展潜力。主要介绍人体可视化的研究背景、常用的可视化开发工具包、图像分割在医学可视化中的作用,最后对它的应用发展前景进行展望。     

TrueType字库文件在CGM图形系统中的读取流程(上)

CGM是一种通用的计算机图形文件格式,在各行各业中应用广泛,尤其是在石油勘探上的应用尤为重要.TrueType字库是一种以二进制编码的数据格式文件,常用于CGM图形处理系统中增加图形的文字标注功能,采用TrueType字库文件设计的文字处理具有很多优势,为此该文将对TrueType字库在CGM图形处理系统中的实现流程进...     

TrueType字库文件在CGM图形系统中的读取流程(下)

CGM是一种通用的计算机图形文件格式,在各行各业中应用广泛,尤其是在石油勘探上的应用尤为重要.TrueType字库是一种以二进制编码的数据格式文件,常用于CGM图形处理系统中增加图形的文字标注功能,采用TrueType字库文件设计的文字处理具有很多优势,为此该文将对TrueType字库在CGM图形处理系统中的实现流程进...     

Emerging Role of the Band‐Structure Approach in Biohybrid Photovoltaics: A Path Beyond Bioelectrochemistry

Emulation of natural photosynthesis is central to modern photovoltaic research targeting sustainable and economic ways of solar energy harvesting. Natural photosynthetic systems have succeeded in efficiently harvesting solar energy which is key to the sustenance of life on earth. With numerous advances in understanding the structure and function of the natural photosystems, the last decade has witnessed new perspectives in developing bioinspired photovoltaics. Interestingly, organic photovoltaics (OPVs) adopting photosynthetic design principles and biophotovoltaics (BPVs) adopting solid‐state device architectures have now converged at a juncture. Several reports in recent years point to a new scope of improvement in OPVs and BPVs stemming from mutual inspiration. At this juncture, there are new perspectives by which a BPV can be designed that were previously limited only to conventional optoelectronics. Treating natural pigment–proteins as optically and electronically functional materials in any photovoltaic design, from the band‐theory viewpoint, is a promising direction for advancing BPVs beyond the boundaries of bioelectrochemistry. This article presents an overview of selected reports on BPVs in the last few years utilizing new design concepts based on band‐theory and its associated principles. In light of this, the scope of the band‐structure approach in BPVs is discussed, eliciting prospective research directions.     

Computer graphics in urban and environmental systems

The key role played by computer graphics in urban, regional, and environmental information systems is surveyed by reference to specific examples. While the interactive cathode-ray tube terminal is found to be the most valuable medium, other output devices such as printers and plotters are discussed as well. Elements of computer cartography and data base organization are introduced, followed by discussions of urban information and transportation network design systems, a regional analysis system, and air and water quality information systems. Specific recommendations are given for further research in data base design and display techniques, and for promising new hardware for use in geographically distributed data systems.     

平面设计中计算机图形图像处理软件的运用探究

计算机图形图像处理软件作为平面设计中被广泛采用的辅助技术,可以为平面设计提供创意性以及颜色展现,并提高平面设计的美观程度以及内涵。但在实际的计算机图形图像处理软件应用过程中,出现了平面设计中的颜色展现较为单一以及设计版式与内涵不够完善等问题。文章将就计算机图形图像处理软件应用过程中出现的问题进行研究,并就如何促进其在平面设计中的应用提一些意见和建议。     

CorelDRAW的绘图功能及应用技术研究

CorelDRAW图形绘制软件是一个集图形设计、文字编辑、排版于一体的大型矢量图形制作软件,是目前市场上最受欢迎的平面设计软件之一。为了解决在教学和实际绘图中遇到的问题,结合教学和实践,具体论述了CorelDRAW 图形软件强大的编辑处理功能,并把在教学和实践中研究总结出的一些绘图技术提供给更多的CorelDRAW 用户,以便掌握更多的绘图方法,提高绘图效果和效率,以制作出满意的作品。