服装数学模型与计算机辅助设计

服装数学模型是在总结服装设计师经验的基础上,按照实测人体的几个基本尺寸,来分配服装各部分的比例,并以数学形式表述。根据数学模型,用 BASIC 语言编制出计算机程序,并在 AppleⅡ机和 SR-6602绘图仪上实现。应用时,顾客选定款式,实际测量其前身长、胸围、裤长、臀围、腰围等主要尺寸。通过人机对话方式,由 AppleⅡ键盘输入上述参数。经运算后,就能在 SR-6602绘图仪上按比例绘制出服装的各种裁片图样,实现服装的计     

绘图仪产品问与答

问:绘图仪是如何分类的? 答:绘图仪(Plotter)顾名思意是用来绘制图形的仪器或设备。按照绘图机理可分为以下几类产品:喷墨绘图仪、笔式绘图仪、热敏绘图仪、热蜡绘图仪、激光绘图仪和静电绘图仪。如按照绘图仪的形状可分为台式绘图仪、落地式绘图仪(或平板式绘图仪)、滚筒式绘图仪。大部分绘图仪都是采用滚筒式设计。 问:笔式绘图仪有何特点? 答:笔式绘图仪自诞生起就一直在市场中占据着主导地位,这是由于它完全模拟设计师手工绘制工程图纸,所以给人一种直观的感觉,线条优美,价格便宜。但是笔式绘图仪使用要求严格,     

绘图仪汉字库计算机辅助设计系统

本文提出了一个绘图仪汉字库的计算机辅助设计系统,利用该设计系统,实现了绘图仪汉字库开发的完全计算机化,完全取代了绘图仪汉字开发的手工劳动。目前,利用该系统,已完成了国标绘图仪全部汉字的开发,收到了令人满意的结果。     

HP DesignJet600喷墨绘图仪应用与实践

计算机工程绘图设备中,笔式绘图仪已逐渐被喷墨绘图仪取代。喷墨绘图仪的使用给需要大量图纸绘制的工程设计单位带来了极大的便利,但在使用上由于其设置较为复杂,工程设计人员CAD应用水平的差异,常常使绘图仪的强大功能得不到充分发挥,同时由于绘图仪设置不当,造成绘图纸张和专用墨水的浪费,使绘图成本大大增加。为了更好的使用喷墨绘图仪,下面就结合笔者的使用经验,以     

HP Design Jet大幅面绘图仪的故障剖析

在建筑勘察设计行业,总少不了跟大幅面绘图仪打交道。绘图仪相关的故障各形各色,该文从理论上把这些问题归归类。它对当前建筑勘察设计行业所使用的主流大幅面绘图仪进行了软硬件故障方面的剖析。     

工程设计良伴绘图仪

自世界上推出第一台平板式自动绘图仪以来,经过40多年的风风雨雨,绘图仪随着计算机的普及发展而不断得到改进和发展。目前绘图仪技术已趋于成熟,绘图仪种类日渐增多,应用领域不断扩大,绘图仪制造商的队伍也不断壮大。因此,绘图仪市场竞争更加激烈。从国际上看,美国垄断着大部分绘图仪市场,其次是日本、德国、法国、丹麦等。如美国的Calcomp公司、HP公司,日本的Copyer公司、Canon公司,德国的Aristo公司,法国的Benson公司等,他们生产着各种各样的绘图仪,如:笔式绘图仪,包括平板式、滚筒式等;无笔式绘图     

LvP－16绘图仪基本软件包及其开发方法

论述了开发Ｌｖｐ－１６绘图仪基本软件包（ＬＢＳＰ）的必要性和实用性。它的开发思想和方法可为其它类型的绘图仪二次开发时采用，具有一定的普遍意义。文章着重介绍了ＬＢＳＰ的绘图功能和开发过程，以及使用方法。     

驱动多种绘图仪的集成电路绘图软件的开发

本文介绍了一个较为通用的由加州理工学院开发的集成电路版图绘图驱动软件—cifp,它接收电路版图中间格式描述几何图形的CIF (Caltech Intermediate Form)语言,并分析转化为绘图文件,直接发送命令驱动绘图仪实现硬拷贝功能。作者在分析了原cifp的基础上。对软件进行了扩充,完善。增加了新的绘制字符标号功能,丰富了原cifp提供给用户的选择项。使新的cifp不仅能驱动高挡绘图仪,亦能驱动低挡的绘图仪(如ROLAND绘图仪)。     

扩展AutoCAD可配置绘图仪的一种方法

本文介绍了一个用PC—BASIC编制的程序,可间接驱动绘图仪,用于扩展Auto-CAD软件可配置绘图仪,给出程序清单及具体绘图过程。     

基于单片机的X-Y绘图仪控制系统设计

X-Y绘图仪是指能分别沿着X向和Y向移动的坐标尺,X-Y绘图仪接收计算机的命令,在图纸上绘出各种字符和图形。平面绘图仪的绘图系统、数控机床的加工系统等,尽管结构和功能各不相同,但基本原理相同。X-Y绘图仪系统是将机械系统与微电子控制系统相结合而形成的一个有机整体。本文通过对X-Y绘图仪的机械系统、控制系统及接口电路的硬件设计及软件设计等,阐述了用8051单片机控制步进电机的驱动,经传动机构带动X向和Y向的坐标尺进行平面绘图。该系统具有操作方便,速度快、精度高等特点。     

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.