基于用户行为分析的智能家居控制软件的设计

设计并实现了一种基于C4.5决策树算法用户行为分析的智能家居控制软件系统,该软件系统利用智能家居用户行为数据并分析,使家居系统能够根据用户行为习惯规律,安排合理的控制家居电器设备,通过web数据可视化使得用户清楚地掌握家中各种家电设备使用情况,为用户提供人性化和智能化的服务.测试结果表明:该软件系统能够帮助提高家居系统的人性化和智能化程度,数据可视化软件系统用户体验性好,具有重要的理论价值和现实意义.     

Supercomputers-perspectives on visualization

The role of visualization and its capabilities are discussed. The loss of information incurred in translating a three-dimensional scene into a two-dimensional image plane and ways of compensating for it are considered. The need for interactive capability is stressed. The dichotomy between the use of visualization for analysis and for communication is traced to the way the technology evolved. That is, historically, computer graphics has been used in two separate and quite different industries: for science and engineering, and for entertainment. The emergence of cross-fertilization between the two is examined. Future trends and challenges are discussed     

Engineering software-seeing data in action

The latest developments in data analysis and visualization software, including extensive use of color, three-dimensional rotating graphics, representation of equations symbolically or graphically, animation, sound, and more links between data and graphs, are examined. The use of exploratory data analysis (EDA) techniques in the programs and the implementation of existing programs on different platforms, such as Windows/NT, are discussed. A listing of available data analysis and visualization software, in which platforms requirements, and enhancements are discussed, is presented     

DefibViz: a visualization tool for the assessment of electrode parameters on transthoracic defibrillation thresholds

DefibViz is a software application developed for defibrillation simulation and visualization. It exploits both surface techniques and methods for the interactive exploration of volumetric datasets for the analysis of transthoracic defibrillation simulation results. DefibViz\ has a graphical user interface for the specification of the shape, size, position, and applied voltage of a defibrillator's electrodes. An option is provided for using 3-D slice plane widgets, which operate on the volumetric datasets, such that the distribution of the voltage gradient induced by an electric shock can be visually inspected in various tissues throughout the myocardium and torso. One goal of DefibViz is to enhance understanding of how electrode parameters relate to the change of the voltage gradient distribution throughout the heart, which may help lead to optimal defibrillator design. DefibViz; is significant, in that, it is built by using an open-source graphics and visualization framework providing a platform for subsequent modifiability and extensibility. Moreover, it integrates simulation and visualization techniques, which previously required the running of several independent software executables, into an enhanced, seamless, and comprehensive software application.     

Open-Source SCA-Based Core Framework and Rapid Development Tools Enable Software-Defined Radio Education and Research

This article describes the Open Source SCA Implementation::Embedded project, an open source software development kit designed for rapid prototyping of software defined radios consistent with the software communications architecture. The SCA is a product of the American military's SDR acquisition program and has played a large role in SDR development in the military and in the wireless industry. OSSIE was designed for use in wireless communications curricula and research efforts, so it is easy to learn and illustrative of software engineering, programming, and communications engineering concepts important in industrial practice today. OSSIE includes a core framework (i.e., common services enumerated in the SCA). It also includes graphical user interface-oriented tools that are easily learned and free to download and use. The tools auto-generate SCA-specific component source code and supporting files, leaving the developer to provide signal processing functionality. In addition, visualization tools for debugging and a growing library of SDR software components are available. Discussed herein are examples of SDRs designed using OSSIE, including embedded applications. OSSIE enables easy transition from concepts to practice in SDR design for communications engineers who may not have a strong software background.     

Math and science software [technology 1999 analysis and forecast]

During the next five years, the huge change taking place in the computing environment due to the Internet will give math and scientific software a buffeting as bruising as the transition from DOS to Windows or from workstations to desktop computers. But in the near future, the Year 2000 bug will probably be on the minds of many engineers and scientists, who will attempt to make sure that their work will not be affected by it. Besides that, software capabilities will expand while prices shrink, making many powerful programs more affordable. Such high-end applications as solids modeling, for example, are becoming less costly, thanks to an increase in the processing speed of PCs. In addition to changing the nature of computing, the Internet is changing the way math and scientific software works and has become a way to distribute software, in some cases free of charge. Also worth noting is the renaissance of Fortran, which through some powerful programs has extended its use as a data analysis and visualization tool. And voice input is emerging as a useful means of entering data in computer-aided design (CAD) programs     

Analysing Internet Software Retrieval Systems: Modeling and Performance Comparison

Nowadays, there exist web sites that allow users to retrieve and install software in an easy way. The performance of these sites may be poor if they are used in wireless networks; the reason is the inadequate use of the net resources that they need. If these kinds of systems are designed using mobile agent technology the previous problem might be avoided. In this paper, we present a comparison between the performance of a software retrieval system especially designed to be used in a wireless network and the performance of a software retrieval system similar to the well-known Tucows.com web site. In order to compare performance, we make use of a software performance process enriched with formal techniques. The process has as important features that it uses UML as a design notation and it uses stochastic Petri nets as formal model. Petri nets provide a formal semantics for the system and a performance model.     

一种基于组件的软件开发方法

在软件工程中关于软件重用的问题是近几年来研究的热点问题。其中研究较多且应用广泛的是基于组件的软件重用。提出了一种基于组件的软件工程开发方法，并进行了详细的阐述。     

Virtual set design

New virtual technology has much to offer broadcast television. Constraints of materials, budgets, and studio space need no longer limit scenic and lighting design. The creative options offered by computer graphics are endless. This new technology frees us from the physical boundaries of reality. It lets designers create scenes previously too difficult, dangerous, or expensive. At first glance it may seem like a paradise. Of course, there are other constraints. For example, there is no turnkey setup available for either hardware or software. In most cases you will use: 1) two if not three operating systems; 2) several different computers; 3) any and all software you can get your hands on; and 4) lots and lots of time and energy     

DefibViz: A Visualization Tool for the Assessment of Electrode Parameters on Transthoracic Defibrillation Thresholds

DefibViz is a software application developed for defibrillation simulation and visualization. It exploits both surface techniques and methods for the interactive exploration of volumetric datasets for the analysis of transthoracic defibrillation simulation results. DefibViz has a graphical user interface for the specification of the shape, size, position, and applied voltage of a defibrillator's electrodes. An option is provided for using 3D slice plane widgets, which operate on the volumetric datasets, such that the distribution of the voltage gradient induced by an electric shock can be visually inspected in various tissues throughout the myocardium and torso. One goal of DefibViz is to enhance understanding of how electrode parameters relate to the change of the voltage gradient distribution throughout the heart, which may help lead to optimal defibrillator design. DefibViz is significant, in that, it is built by using an open-source graphics and visualization framework providing a platform for subsequent modifiability and extensibility. Moreover, it integrates simulation and visualization techniques, which previously required the running of several independent software executables, into an enhanced, seamless, and comprehensive software application.     

PC programs for engineers. Analysis and synthesis of passive filters

The program described in this column is not just another vehicle for performing the computations involved in network synthesis. Rather, it provides a multidimensional educational environment that allows interactive access to a wide range of material, including theoretical foundations, visualization of abstract concepts, and software from synthesis and analysis. All of this is packaged in an unusually sophisticated, graphics-enhanced shell that is a pleasure to use and explore.     

基于数据可视化的农民工异地医疗分析系统

如今各个领域的数据展示中都广泛应用数据可视化技术,特别是在Web应用方面,各种类型的网站都在使用数据可视化技术丰富和美化页面,从而吸引用户的眼球。然而,数据可视化技术是一个涉及到多种学科和技术的交叉领域,研究人员很难掌握所有相关的知识。随着Web2．0时代的到来,大量可视化组件的研发解决了这个问题,使得可视化技术的应用更加得心应手。在讨论数据可视化概念的基础上介绍了农民工异地医疗数据分析系统及系统中数据可视化的应用,并描述了系统中运用的可视化组件及实现方法。     

Qwt类库在二维云图绘制中的应用

介绍了Qwt类库在数值模拟软件中的开发方法。首先简要介绍了开发工具Qt和图形库Qwt,然后给出数值模拟软件的可视化分析,最后重点阐述了实现Qwt云图绘制功能的关键技术。通过Qwt在软件中的应用,实现了计算数据的可视化,并取得了良好的云图可视化效果。基于Qwt的开发结果表明,Qwt在数值模拟软件后处理的开发中具有很强的优势。     

C＋＋类库Qt在数值模拟软件开发中的应用

介绍调用C＋＋类库Qt进行数值模拟软件开发的方法。首先介绍QT及其图形库QWt;其次对脉冲束辐照材料热力学效应软件GUI的设计做了详细说明．并给出数据文件的输入、输出方法;最后根据计算结果调用Qwt库显示出处理需要的图形。基于Qt的软件开发表明：Qt在数值计算软件开发中具有很强的优势．适合作为数值计算软件GUI开发的工作平台.     

The Active3D-Build: a Web-based civil engineering platform

We developed the Active3D-Build to improve civil engineering project management. This Web-based platform lets geographically dispersed project participants-from architects to electricians to plumbers-directly use and exchange project documents in a centralized virtual environment using a simple Web browser. A 3D visualization lets participants move around in the building being designed and obtain information about the objects that compose it. The Active3D-Lab is the software development arm of the Archimede Group, a civil engineering and facility management firm. The Active3DLab team includes three administrative staff members, eight developers, and three University of Bourgogne researchers. We're already marketing this product, and several enterprises use it in their civil engineering projects     

Biological data integration: wrapping data and tools

Scientific data is inevitably digital and stored in a wide variety of formats in heterogeneous systems. Scientists need to access an integrated view of remote or local heterogeneous data sources with advanced data access, analysis, and visualization tools. Building a digital library for scientific data requires accessing and manipulating data extracted from flat files or databases, documents retrieved from the Web as well as data generated by software. We present an approach to wrapping web data sources, databases, flat files, or data generated by tools through a database view mechanism. Generally, a wrapper has two tasks: it first sends a query to the source to retrieve data and, second builds the expected output with respect to the virtual structure. Our wrappers are composed of a retrieval component based on an intermediate object view mechanism called search views mapping the source capabilities to attributes, and an Extensible Markup Language (XML) engine, respectively, to perform these two tasks. The originality of the approach consists of: 1) a generic view mechanism to access seamlessly data sources with limited capabilities and 2) the ability to wrap data sources as well as the useful specific tools they may provide. Our approach has been developed and demonstrated as part of the multidatabase system supporting queries via uniform object protocol model (OPM) interfaces     

Molecular visualization: a microcosm of the e-revolution

Molecular visualization software programs display a 3D arrangement of molecules in an interactive format, allowing researchers to examine known molecules as well as theoretical molecules in drug development. In the last two decades, biochemistry has shifted its emphasis from bonds and connectivity to surfaces and interactions. Molecular visualization, at the intersection of computer graphics and chemistry, accelerated this transition with interactive displays of 3D molecular models on personal computers. The free access to both molecular databases and visualization programs has enhanced our understanding of basic biological concepts. Molecular visualization also encompasses a thriving Internet community that is constantly honing and dynamically revising software implementations in response to user feedback. There's no question that computer technology has revolutionized biomedical fields such as biochemistry, genetic engineering, and molecular biology. We can now study critical biomolecules in their folded form rather than as a string of amino acids.     

A process model for packaged software development

As software development migrates from its roots as a process for building a custom product to a process for building packaged products, there is a greater need for an appropriate product development process model that is market-oriented. Field data suggests that process models are not widely used in the package industry. An overview of normative process models in the software engineering, engineering management, and marketing disciplines reveals that all of them fall short in one way or another for packaged software processes. Eight special needs are identified that set the packaged software process model apart from other individual models: addressing multiple user types; differentiating the product; finding the remote customer; involving the remote customer; facilitating speed of development; creating the marketing interface; developing in a highly iterative mode; and releasing a near defect-free product. These needs are operationalized into the proposed packaged software process model. The process model is based on two central constructs: a requirements loop; and a quality loop. The loops are separated by a stage in which requirements specifications are frozen. The requirements loop's goal is to discover requirements early and comprehensively. It is incremental (relying on prototyping), has several evaluation and exit points, and structures involvement of customers and other external sources such as marketing. The quality loop addresses the need to reduce defects; it begins with design and coding stages. It is also incremental and has several evaluation and exit points     

Three-dimensional display from cross-sectional tomographic images: an application to magnetic resonance imaging

A system has been developed to facilitate three-dimensional visualizations of tomographic image data. Tomographic techniques yield parallel planes of data at discrete locations; thus, a series of images comprises a three-dimensional database. From this database, a system has been developed to perform three-dimensional calculations, measurements, and display. The system consists of a conventional two-dimensional video monitor, a digitizing tablet for user interaction and region-of-interest (ROI) definition, application-oriented computational software, and an image display system for true three-dimensional database visualization. The three-dimensional display makes use of a varifocal mirror system with vector graphics capability. Through the use of specialized contouring software, we illustrate the utility of this system in the specific examples of displays prepared from magnetic resonance (MR) images of the brain and carotid arteries. It can be concluded that this system will provide valuable diagnostic and physiologic information that will provide added insight into normal and abnormal structure and its relationship to function.     

一种∑-Δ模数转换器

∑-Δ模数转换器是一种高度集成化的新型模数转换器,采用过采样技术,无需采样保持电路.它内置了多路复用器、可编程放大器、调制器、数字滤波器、校准系统和串行接口.其转换率最高为150kHz,分辨率可达24位.本文对该系列∑-Δ模数转换器的原理结构及其操作进行简单介绍.