如何用VB.NET实现点阵数据的生成与上传

A点阵字库是把每个字符分成16×16或24×24个点,然后用每个点的虚实来表示字符的轮廓,文字点阵是一种文字在计算机字库中字形信息的存储方式,是点阵的数字化。1.设计背景以往在LED电子屏上实现文字显示的基本原理是利用点阵文字库文件,通过其中的每一位去控制屏幕上一个点的明暗以实现文字的显示,它存储在上位机中的是机内码,而在显示     

彩色点阵LED屏幕控制器的设计

设计了一种彩色点阵LED大屏幕的控制器,该控制器采用单片机读取存储在SD上的点阵数据文件,按帧串行地输出到LED控制芯片并刷新LED屏幕显示。该控制器能够存储并动态显示灵活多样的文字或者动画,具有性价比高、体积小等优点。     

LED点阵显示系统

随着信息技术的发展,LED显示屏已成为当今社会一种常见的信息发布平台,它被广泛应用于室内外需要显示信息的场合,例如户内外公共场所广告宣传、机场车站旅客引导信息、公交车辆报站系统、证券与银行信息显示、餐馆报价信息豆示、高速公路可变情报板等。本文主要介绍了LED点阵的显示原理,点阵LED显示屏构成部分,然后主要研究了LED点阵显示屏系统的软硬件设计,主要应用的主控制器是单片机AT89S51,而且可以实现中英文字符的动态显示。     

基于文本的图像压缩在LED显示屏中的应用

LED显示屏主要用来显示文字信息,它的控制系统多为单片机控制,通信方式为rs232或者低速的以太网.考虑到单片机的处理能力和控制系统成本的原因,一般控制系统都没有设置字库,所以LED显示屏上显示的文字一般都用位图点阵信息表示.但基于文本的位图数据量很大,且控制系统的通讯传输速度低下,在发送大量显示画面时位图数据的压缩就非常重要.由于控制系统单片机的处理能力有限,JPEG、GIF等图像压缩算法难以实现.基于行程编码图像压缩算法计算量小、适合单片机处理,而且对于文字位图的压缩率较高.     

基于单片机的LED汉字点阵显示系统设计

首先介绍了LED汉字点阵显示的设计思想及编码原理;接着介绍了基于89S52单片机的LED汉字点阵显示的硬件设计与软件设计;最后在Keil软件平台上编译了LED汉字点阵显示程序并在Proteus软件平台上实现了LED汉字点阵显示的仿真.     

LED模拟屏在电网监控系统中的应用

一、引言大型模拟屏作为一种新型图文信息显示媒介，已较多应用于公共场所的广告信息显示、金融股票信息显示、车站与机场的车次与航班显示、大型运动会的信息显示等多种应用环境。依据用途、使用场所、成本价格等因素，基本显示材料可选择平面电视、磁翻板、LED点阵等等。LED点阵式模拟屏是一种较新的大屏幕显示材料，它由自发光的半导体材料构成。其优点是：本身不发热，响应速度极快，使用寿命长，视觉效果较好，随着半导体材料技术的发展，蓝色发光二极管已经问世，这意味着由LED点阵组成的全彩色模拟屏不久将会成为现实，它将成为…     

动态移位显示屏的设计

以8×8点阵为基础,设计了一个动态移位显示屏。全屏由20块8×8点阵LED显示模块组成,显示采用动态显示,使文字或图形能实现静止、移入移出等多种显示方式。文中详细介绍了LED点阵显示的显示原理、硬件设计和软件设计。     

基于AT89S51单片机的LED点阵显示屏设计

LED电子显示屏是利用发光二极管构成的点阵模块或像素单元组成可变面积的显示屏幕,在信息显示领城得到了广泛的应用.实现显示屏的技术也有很多种.该文介绍了如何用51单片机实现LED点阵显示屏.结合几个具体的问题进行了阐述.     

基于PIC16F73的广告窗控制系统开发

开发了一种广告窗控制系统,以PIC16F73单片机为核心控制器,具有时钟、温湿度测量、语音播报、LED点阵屏显示、自动照明等功能.内部时钟精度高,LED点阵显示屏循环显示当前地名、时间、温度、湿度等信息,利用超声波接近开关能自动判断是否有人靠近,有人靠近时能对显示屏上的信息进行语音播报,定时翻转展示窗中的广告画.与传统的站台广告窗相比,该控制系统能使广告窗更加人性化和智能化,表现效果更好,成本低廉,具有推广应用价值.     

一种可扩充LED点阵显示模块及其驱动设计

详述单片机在可扩充(最多8位)16×16LED点阵显示模块中的开发应用,包括LED点阵显示硬件电路的设计及各个电路的原理及功能、单片控制电路及其与LED点阵的接口驱动电路的设计、单片机控制程序的设计及调试.     

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.     

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.     

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     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.