基于VB和VC 语言的DCS组态软件的设计与实现

ＶｉｓｕａｌＢａｓｉｃ和ＶｉｓｕａｌＣ＋＋是强大的可视化编程工具,本文结合它们各自的优点介绍如何设计和实现分布式控制系统的工程师站和操作员站软件。     

基于VB和VC＋＋语言的DCS组态软件的设计与实现

Ｖｉｓｕａｌ Ｂａｓｉｃ和ＶｉｓｕａｌＣ＋＋是强大的可视化编程工具,本语结合它们各自的优点介绍如何设计和实现分布工控制系统的工程师站和操作员站软件。     

基于浏览器的文件上载技术研究

三种实现基于浏览器的文件上载方法及相应的Ｖｉｓｕａｌ Ｃ＋＋和Ｖｉｓｕａｌ Ｂａｓｉｃ代码。     

在Visual FoxPro中利用DLL实现硬件端口控制

本文介绍了在Ｖｉｓｕａｌ ＦｏｘＰｒｏ中利用动态链接库实现硬件端口控制，同时介绍了在Ｖｉｓｕａｌ Ｃ＋＋中如何建立动态链接库以及如何在Ｖｉｓｕａｌ ＦｏｘＰｒｏ中使用动态链接库。     

Visual C＋＋4.0的面向对象性能分析及应用

在实践的基础上对Ｖｉｓｕａｌｃ＋＋４．０的面向对象性能作了浅显的分析，此分析主要集中在ＶｉｓｕａｌＣ＋＋４．０的基础类库，面向对象的可社化编程工具以及对象连接和嵌入上。Ｖｉｓｕａｌ Ｃ＋＋４．０的编程过程包括可视化设计和代码编写阶段，在以上分析的基础上将这一性能的应用加以介绍，并以实例对Ｖｉｓｕａｌｃ＋＋４．０的面向圣旨编程过程加以演示。     

用VC＋＋4.1的Help Workshop制作帮助文件

通过一个简单的实例，介绍用Ｈｅｌｐ Ｗｏｒｋｓｈｏｐ制作帮助文件的一般步骤，并简述其在ＶｉｓｕａｌＣ＋＋和Ｖｉｓｕａｌ Ｂａｓｉｃ应用程序中的使用方法。     

基于浏览器的文件上载技术研究

许多Ｗｅｂ基应用都涉及到基于浏览器的文件上载。本文给出了三种实现基于浏览器的文件上载方法及相应的ＶｉｓｕａｌＣ＋＋和Ｖｉｓｕａｌ Ｂａｓｉｃ代码。     

用VC6.0开发通信软件

运用ＶｉｓｕａｌＣ＋＋设计串口通讯程序的方法,并以实际程序为例介绍了如何运用ＶｉｓｕａｌＣ＋＋提供的文件读写功能来实现串口编程。     

基于MFC的ODBC数据库访问与编程

本文介绍了在ＶｉｓｕａｌＣ＋＋（５．０）环境下,利用ＭＦＣ通过ＯＤＢＣ接口访问ＶｉｓｕａｌＦｏｘｐｒｏ数据库的方法和编程。     

基于C/S模式的Winsock网络通信程序的开发

主要介绍Ｗｉｎｓｏｃｋ的基本概念及其编程原理,同时通过实例来说明Ｗｉｎｓｏｃｋ的网络通信程序的开发,即分别利用ＶｉｓｕａｌＣ＋＋和ＶｉｓｕａｌＢａｓｉｃ开发了服务器应用程序和客户应用程序。     

The effects of visual lobe training with easy and difficult targets on changes of visual lobe shape characteristics and visual search performance

This study aimed to study the effects of training on visual lobe shape characteristics with two levels of target difficulty (an easy target O and a difficult target V) and to study the transfer effect from lobe shape training to visual search performance. It was found that there was a noticeable improvement in lobe area and roundness for the difficult target lobes with the difficult target training groups, and that lobe area and roundness showed greatest sensitivity to the effects of training. The easy target lobes for the difficult target training group did not show any differences between pretest and posttest. There was a narrowing of differences in shape parameters between the two target difficulties from pretest to posttest after lobe mapping practice, suggesting that such practice could minimize lobe shape differences for different job difficulties. Search task practice was found to improve search performance, but lobe training produced no additional benefit for search time. Correlation analysis between lobe shape parameters and search time showed that a significant relationship existed only for the long time search task, indicating that mathematical models previously developed for search performance prediction may not be valid for short time search tasks.

Relevance to industry

This research showed the relative sensitivity of different lobe shape indexes from training and indicated the importance of selecting an appropriate level of target difficulty for enhancing training effectiveness.     

基于单目视觉的同时定位与建图算法研究综述*

与传统基于激光传感器的同时定位与建图（SLAM）方法相比,基于图像视觉传感器SLAM方法能廉价的获得更多环境信息,帮助移动机器人提高智能性。不同于用带深度信息的3D传感器研究SLAM问题,单目视觉SLAM算法用二维图像序列在线构建三维环境地图并实现实时定位。针对多种单目视觉SLAM算法进行对比研究,分析了近10年来流行的单目视觉定位算法的主要思路及其分类,指出基于优化方法正取代滤波器方法成为主流方法。从初始化、位姿估计、地图创建、闭环检测等功能组件的角度分别总结了当下流行的各种单目视觉 SLAM 或Odometry系统的工作原理和关键技术,阐述它们的工作过程和性能特点。总结了近年最新单目视觉定位算法的设计思路,最后概括指出本领域的研究热点与发展趋势。     

串行通信可视化控件编程方法研究

本文介绍了使用计算机高级语言通过可视化通信控件进行计算机之间及其与外部设备实现串行通信的编程方法，并以目前流行的编程语言Visual C^ 、Visual Basic为例编写了相应的示例。     

VB与VC混合编程技术的研究

VB具有快速实现系统顶层功能的优点,而VC能很好地完成底层操作.介绍如何结合这两种语言的优点进行混合编程的几种方法,通过具体实例演示它们的应用.并且对混合编程中需要注意的问题也进行了阐述.     

Visual lobe shape characteristics of experienced industrial inspectors and inexperienced subjects

This article reports research on visual lobe shape differences between experienced industrial inspectors and inexperienced students and the effects of years of inspection experience on lobe‐shape characteristics. Comparison of the visual lobes of students and inspectors showed that lobe roundness of the inspectors was higher than that of the students. Also, marked improvement in lobe roundness and regularity for inspectors was evident in those inspectors who had relatively long experience in inspection work, indicating that daily inspection practice did not seem to be an effective way of improving lobe‐shape characteristics. The increased lobe roundness level did not change, however, even when the inspectors had not performed an inspection job for a long period of time. This finding suggests that the improved lobe‐roundness level could be maintained even without any follow‐up inspection practice. It seems that intensive lobe training rather than inspection practice may be required to improve lobe‐shape characteristics in a short time. No relationship was found between lobe‐shape parameters and the ranked inspection performance of the inspectors, which indicated that, for the inspectors, better search performance may be related more to their better decision making rather than to their higher lobe‐roundness level or inspection speed. © 2010 Wiley Periodicals, Inc.     

Visual lobe shape and search performance for targets of different difficulty

In quantitative models of visual search it has usually been assumed that visual lobe area shape was sufficiently regular to be approximated by a circle or ellipse. However, the irregularities in visual lobe shapes that have been found in studies involving extensive lobe mapping have suggested that lobe shape may have important implications for visual search performance and for the accuracy of mathematical models used for performance prediction. However, no systematic research on the relationship between the shape aspect of visual lobes and search performance seems to have been carried out and no comparisons of visual lobe shape characteristics under the effect of target difficulty have been reported. The current study was conducted to achieve two major objectives in two experiments. Experiment 1 used two different targets (letter ‘O’ and letter ‘Y’) to map the visual lobes of subjects in order to provide a systematic and quantitative comparison of lobe shape characteristics and experiment 2 was to investigate the correlation of visual lobe shape characteristics with visual search time under the effect of target difficulty. The visual lobes of 28 subjects were mapped on 24 imaginary and regularly spaced meridians originating from the centre of the visual field to resemble the full field mapping situation. Five categories of shape indices, viz. roundness, boundary smoothness, symmetry, elongation and shape regularity were investigated. The results of this study demonstrated that the visual lobe shapes of subjects elongate horizontally with medium level of roundness, high levels of boundary smoothness, symmetry and regularity for an easy target (O) against a homogeneous background of ‘X’s. When a difficult target (Y) was used, the visual lobes of the subjects were still elongated horizontally but to a smaller extent and with a low level of roundness, medium level of boundary smoothness and regularity and a similar high level of symmetry to the easy target. Moreover, significant correlations between shape indices and visual search time were found, suggesting mathematical models for predicting search time should not merely rely on area but also should consider visual lobe shape indices. Finally, a universal mathematical model containing several visual lobe shape indices was developed, which was applicable in the prediction of visual search time for a range of similar search tasks.     

基于OpenGVS的视景仿真的关键技术研究

该文介绍了如何解决视景仿真应用中的一些关键技术,如控制显示应用程序中的动态视景、地形匹配、碰撞检测、动态地形中海水的实现等,可以用视景管理软件OpenGVS为工具实现。上述关键应用技术已在国家863计划重点项目“分布式虚拟战场环境中仿真实体及其应用研究”中得到应用,并取得了良好的效果。     

Matlab和Visual C++接口中编译环境的配置

Ｍａｔｌａｂ语言以及 Ｍａｔｌａｂ和 Ｃ接口的 ３种方式,分析了采用接口方式（ｃ）时, Ｍａｔｌａｂ和ＶｉｓｕａｌＣ＋＋接口在各种编译方式下编译环境的设置方法,为用户扩展Ｍａｔｌａｂ的应用范围、提高程序的执行效率提供了有益的帮助。     

基于VB6．0的考试系统设计初探

介绍了采用VB6．0与Access2000的考试系统开发原理及过程,并以VB程序设计考试为例,讲解该系统的主要功能的实现,其中包括自动出卷和自动阋卷等功能。该考试系统可以大大提高了效率,具有良好的开放性.     

一种通用的视觉机器人体系结构

提出了一种新型的通用视觉机器人体系结构 ,它以视觉伺服结构作为基本框架 ,通过引入集散体系结构来提高系统的实时性和灵活性 ,同时作了进一步扩展 ,使其能够满足应用和性能需求。同其它体系结构相比 ,快速响应、结构灵活和高性能是其特点。通过一个实际的视觉伺服系统示例了该体系结构的应用技改结构如何满足设计性能要求