在VB中实现回调函数的调用

Windows动态链接库中,众多API函数是开发Windows应用程序必不可少的工具之一,而其中需回调函数的API函数又是Windows API中的重要组成部分。然而,VB应用程序不能直接调用这些API函数。本文就如何在VB应用程序中,调用这些需回调函数的API函数提出了解决方法。     

在Delphi中实现多媒体定时器

通过Delphi调用Windows的API函数来实现的。在Delphi的MmSysteni单元中专门封装了一些与多媒体编程有关的API函数和数据类型。其中timeSetEvent函数可用来创建一个多媒体定时器，并执行定时过程。     

PowerBuilder调用API函数剖析

利用PB开发出灵活、实用、高效的应用程序,就必然涉及到对Windows API函数的调用。MSDN给出的API均为C语言格式,要在PB中调用Windows API函数,就需要将API转换成合法的PB外部函数声明,并使用正确的参数调用A-PI函数。     

在Delphi中如何驱动其它应用程序

在应用程序的开发过程中,常常需要驱动一些与之相关的应用程序,以增强功能。在Quick Basic和Visual Basic中,利用Shell语句可以很容易地实现这一过程。笔者在利用Delphi 1.0进行应用程序开发过程中,也遇到了同样的问题,但在Delphi中,却没有与此相对应的函数,因此,只好通过调用Windows API函数Winexec()来实现。 Delphi中Winexec()函数的格式为:function WinExec(CmdLine:PChar,CmdShow:Word):Word; 其功能是执行程序开发者指定的应用程序。其中包括两个参数:CmdLine和CmdShow。CmdLine指向一个以NULL结尾的Windows字符串,即将要运行的应用程序命令行,包括可执行文件的路径和文件名(Path\＊.exe,可不带文件扩     

基于VB的Windows API函数应用

API函数介于操作系统核心和Windows应用程序之间，能够直接控制和处理计算机的系统参数和硬件资源，实现许多高级功能。通过具体实例，阐述了在VB中调用API函数的方法。     

任务栏通知区应用程序的设计

介绍了 Windows任务栏通知区的基本数据结构及其相关 API函数 ,讨论了在 Delphi下任务栏通知区应用程序的设计方法。     

API函数在VB开发中的应用

从调用API函数的一般方法,本文应用实例,注意事项三个方面讲述了API函数在VB开发中的应用,并阐述了VB通过调用API函数,能够直接控制和处理计算机的系统参数和硬件资源,实现许多高级功能,开发出具有专业水准的Windows应用程序。     

用Delphi开发WinSock应用程序

Windows套接字(Windows Sockets,简称WinSock)是TCP/IP网络的应用编程接口(Application Programming Interface,即API),它定义了多个函数和例程,以使程序员能够利用Windows的消息驱动机制进行编程;更进一步的是,Delphi(Delphi 4与Delphi 5)用一组组件为我们封装了这些不是很容易使用的WinSock API,使得用户可以利用这些组件方便、迅速地开发一些有关WinSock的应用程序,如编写HTTP、FTP、E-Mail和Web浏览器等方面的应用程序.     

利用VisualBasic检测当前系统信息

一个优良的应用程序应该随时让用户知道操作系统及系统资源的有关信息,诸如Windows的版本、剩余的内存、当前目录以及一些硬件方面的型号等信息都很有用。在Windows中提供了丰富的应用程序接口函数(API),这些函数可以与系统进行交互,取得当前系统的一些信息。Visual Basic具有调用这些API函数的能力。调用这些函数时必须经过下列两个步骤:     

Windows下如何读取DOS实模式内存

本文介绍了如何利用DPMI及Windows API函数创建Windows DLL库,实现了在Delphi应用程序中直接读取DOS实模式内存,略加改造即可运用于C及Visual Basic。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.