三维曲面展开算法在玩具设计中的应用

在传统的玩具设计中，布绒玩具的设计是一个复杂过程。文中提出两个算法：三维表面区域搜索算法和三维曲面展开算法并应用于玩具设计。在三维玩具CAD模型的基础上，该方法将三维的玩具表面自动展开为二维的裁片。运用该方法，用户可以容易地交互操作进行玩具表面切割线的设计，同时可以设置纹理，从而大大减少了玩具的设计与制作时间，降低成本。     

高智能玩具

随着高科技的发展，市场上智能型玩具层出不穷，它们与家用电脑一样，正越来越受到油费者的青睐。会与人大谈的玩具这种玩具在内部装了一种既会识别语音又会会成语音的设各，所以利用它能与儿童进行情感上的交流，可用来克服独生儿童的孤独感。当小主人说：“我便了”。玩具就会马上回答：“我也饿了，我们吃点什么呢？”这种玩具颇受孩子们的宠爱，它与小主人对话的内容多达数十种．会出儿室拼造、发音的环江这种玩具实际上是一种教具，在儿童学习外语时，它能教儿童拼读、发音。为提高语音合成的质量，在制造时采用“线性预测编码”技术。…     

世界上最小的机器人诞生了——Omnibo2007 i-SOBOT

随着电脑游戏慢慢超越玩具市场，传统的玩具制造商正试图创造新的产品，他们的目标客户正慢慢从小孩转向怀旧的成年人。随着人口的下降，电脑游戏快速发展，日本的玩具产业在过去两年来已经经受了一系列的震荡，玩具市场正在向成人扩张。在这双重重压下，日本玩具厂商Takara tomy研制出了一种手掌大小的人形机器人，瞄准像象小孩一样玩玩具的成年人。     

矩形件排样问题的遗传算法求解

本文研究了求解矩形件正交排样优化问题的遗传算法。同时，将矩形件正交排样问题转化为一个排列问题，提出了求一个排列所对应的排样图的下台阶算法（改进的ＢＬ算法）将下台阶算法与遗传算法相结合，用于矩形件排样问题的求解，给出了该算法的实现。用该算法对文献中的两个算例进行了求解，结果表明该算法获得了比ＢＬ算法更好的解，是一种较为行之有效的方法。     

基于两阶段的分段单一矩形优化排样

为有效解决分段单一矩形优化排样问题,给出一个求解分段单一矩形优化排样问题的两阶段方法。第一阶段完成标准子段最佳排样方式求解,并将二维排样问题转化为一维下料问题,第二阶段使用适合于一维下料问题求解的算法完成板材最佳排样方式求解。使用该方法开发了一个单一矩形优化排样系统,该系统既可以解决分段单一矩形排样问题也可以解决其他类型的单一矩形优化排样问题。企业应用实例表明该方法是求解分段单一矩形优化排样问题的一个较为有效的方法。     

基于精确计算步距的冲裁件优化排样

在以往的计算机求解冲裁件优化排样方案中，用于求解冲裁步距的时间过长（如移步法＾［１－２］，大大影响了排样速度。本文在分析两图形相交条件的基础上，应用分断和离散函数求距法，提出了快速精确计算步距的新算法，大幅度减少了排样时间，有实用价值。     

基于虚拟仪器技术的电玩具检测设备的研制

电玩具的产品质量检测涉及多类电参数测量。采用虚拟仪器技术,基于LabVIEW图形化编程平台,设计了一套电玩具检测设备。介绍了设备的硬件结构,软件程序,指出该设备可提高现有电玩具检测水平。     

基于遗传模拟退火算法的不规则多边形排样

将遗传授拟退火算法应用于计算机辅助排样领域，设计了一种基于遗传模拟退火技术的启发式排样算法．该算法能够处理不规则多边形的排样问题；同时，给出一种对象的几何表达方式，可以忽略高度不规则形状带来的复杂性影响．该算法通过基于遗传模拟退火算法的全局优化概率搜索，寻找排样件在排样时的最优次序及各自的旋转角度，然后采用基于左下角(BL)策略的启发式排样算法实现自动排样．     

玩物丧志海陆空

中国有句俗语叫“玩物丧志”，不过，得看是什么玩物。如果是今天介绍的玩物的话，这“丧”字恐怕就得改一改了。随着家庭越来越数字化，玩具也越来越智能。数字化的家庭．智能化的玩具，这就是你的新生活。     

日本机器人玩具工业发展史

日本第一代机器人玩具是用马口铁制造的,对战后日本的工业复苏产生了一定影响。在横滨马口铁玩具博物馆陈列的最早的原子机器人是40年代后期制造的,大约5英寸高.象80％～90％的第一代机器人玩具一样,原子机器人并不是为日本儿童制造的,而是用于出口。     

高校财务数据仓库的设计与实现

高校的信息化工作已从管理系统发展到决策支持系统,数据仓库是决策支持系统的核心。该文分析高校财务预算系统的现状和存在的问题设计实现一个数据仓库系统,利用OLAP技术进行数据分析。系统通过在某高校的实际应用,取得了良好效果。     

汉法机器翻译系统初探

文章讨论了汉法机器翻译系统(CFMT)中的汉语分析和法语生成问题。以规范的汉语书面语的翻译为目标,研究可扩展的实用化的汉法机器翻译系统,系统中采用后部优先最大匹配算法及词义纠错的方法实施对源语文本的词切分,编程中将程序和规则相分离以提高系统的易维护和可扩充性。初步实现的系统曾对部分常用句型的例句进行了测试,表明该系统的设计是合理可行的。     

Learning Logical Definitions from Relations

This paper describes FOIL, a system that learns Horn clauses from data expressed as relations. FOIL is based on ideas that have proved effective in attribute-value learning systems, but extends them to a first-order formalism. This new system has been applied successfully to several tasks taken from the machine learning literature.     

Automatic categorization for improving Spanish into Spanish Sign Language machine translation

This paper describes a preprocessing module for improving the performance of a Spanish into Spanish Sign Language (Lengua de Signos Española: LSE) translation system when dealing with sparse training data. This preprocessing module replaces Spanish words with associated tags. The list with Spanish words (vocabulary) and associated tags used by this module is computed automatically considering those signs that show the highest probability of being the translation of every Spanish word. This automatic tag extraction has been compared to a manual strategy achieving almost the same improvement. In this analysis, several alternatives for dealing with non-relevant words have been studied. Non-relevant words are Spanish words not assigned to any sign. The preprocessing module has been incorporated into two well-known statistical translation architectures: a phrase-based system and a Statistical Finite State Transducer (SFST). This system has been developed for a specific application domain: the renewal of Identity Documents and Driver's License. In order to evaluate the system a parallel corpus made up of 4080 Spanish sentences and their LSE translation has been used. The evaluation results revealed a significant performance improvement when including this preprocessing module. In the phrase-based system, the proposed module has given rise to an increase in BLEU (Bilingual Evaluation Understudy) from 73.8% to 81.0% and an increase in the human evaluation score from 0.64 to 0.83. In the case of SFST, BLEU increased from 70.6% to 78.4% and the human evaluation score from 0.65 to 0.82.     

渐近跟踪鲁棒控制的混沌同步

对混沌系统同步控制中的控制器进行了研究,因其实际应用受限大等因素而要求系统具有较好的鲁棒性.把渐近跟踪作为系统同步的推广,从控制方法的角度设计一个混沌同步控制器,运用极点配置法求出控制器的增益参数并从控制理论上证明了该思路的可行性.通过对Lorenz系统的数值仿真试验,验证了该方法在控制混沌同步方面的有效性.为混沌控制中设计耐受性高的控制器提供了依据.     

旋风预热器教研平台的设计与实现

本文介绍了一种新型的旋风预热器教研平台系统,它源于水泥回转窑实际系统并同时结合教研的需求做了诸多改进。该系统由旋风预热筒设备、单片机控制系统、调速风机及电加热等执行装置及其上位机管理系统组成的一个完整系统。文章对各个组成部分的软硬件设计实现进行了阐述,对其技术特点做了详细说明,该系统涵盖知识面广,被控对象复杂,非常适合开展综合性试验及控制策略研究,经实践教研检验该教研平台较常规试验平台有更好的效果。     

On the architecture of a human-centered CAD agent system

With an increasing role of computers in the design process, a strong foundation of the basic principles for building CAD systems is extremely necessary. This work describes the architecture of a CAD system from the perspective of the capabilities required to build a human centered CAD system. These capabilities have been reported as task-sharing, communication, transparency, design rationale and cognition. Existing systems for engineering design have been analyzed from the perspective of these capabilities and an agent-based system previously reported in literature has been extended to a new architecture to support three of the aforementioned capabilities. The proposed architecture is an amalgamation of multi-agent systems, the ACT-R cognitive architecture and fuzzy rule based Petri nets. The salient advantage of this architecture is that it focuses on the capabilities of design rationale, transparency and cognition together—something which has been missing from all the current works in literature and is unique to the domain of application of the software system, which in this case is engineering design. The other capabilities namely task sharing and communication can be incorporated from lessons learnt from human–computer interaction research. The effectiveness of the proposed architecture is demonstrated by a hypothetical design case along with its implementation.     

The cambridge multiple-access system in retrospect

This paper reports on some of the lessons that have been learned during 5 years' operation of the Cambridge Multiple-Access System. It begins by summarizing the design goals and goes on to describe the way in which on-line and off-line facilities have been integrated. There is a section on security of access and one on the maintenance and up-dating of the system. Scheduling of jobs is largely automatic and the operators receive their instructions from the system. Experience obtained in the operation of the system is discussed both from a software and a managerial point of view.     

A stability guaranteed active fault‐tolerant control system against actuator failures

In this paper, a new strategy for fault‐tolerant control system design has been proposed using multiple controllers. The design of such controllers is shown to be unique in the sense that the resulting control system neither suffers from the problem of conservativeness of conventional passive fault‐tolerant control nor from the risk of instability associated with active fault‐tolerant control in case that an incorrect fault detection and isolation decision is made. In other words, the stability of the closed‐loop system is always ensured regardless of the decision made by the fault detection and isolation scheme. A correct decision will further lead to optimal performance of the closed‐loop system. This paper deals with the conflicting requirements among stability, redundancy, and graceful degradation in performance for fault‐tolerant control systems by using robust control techniques. A detailed design procedure has been presented with consideration of parameter uncertainties. Both total and partial actuator failures have been considered. This new control strategy has been demonstrated by controlling a McDonnell F‐4C airplane in the lateral‐direction through simulation. Copyright © 2004 John Wiley & Sons, Ltd.     

Air pollution modelling at a regional scale

A mesoscale simulation system Meso-NH-C allowing for on line coupling between dynamics and chemistry is presented. Further advantages of this system lie in high vertical resolution, nesting capabilities and a full set of parametrization schemes. This system is applied from 9 to 11 August 1997 for a pollution episode over Western Europe. In this episode, both a European and a regional scale analysis have been performed (Greater Paris area). The possibilities of such a modelling system have been emphasized, particularly regarding the evaluation of transboundary fluxes.