智能图元特征提取与图形匹配技术

实现作业的智能化批改是本课程多年来未能突破的技术难点,作者要解决的正是这难点。其关键技术是图元特征提取与图形匹配,它为智能化批改的算法、设计与实现做了理论上的准备。并找到了图形匹配的方法,研究了图形匹配技术,并且成功地利用图形匹配技术,实现了规则图元和非规则图元(曲线)的智能批改。     

光伏电池片生产车间智能物流调度研究

为实现光伏电池片生产车间物流的智能化改造,提出以最大化瓶颈工序机台产能的方式来最大化生产车间产能,并设计相关数学模型和智能物流调度算法。首先,通过对光伏电池片生产车间的问题描述与分析,建立以瓶颈工序机台产能最大化（瓶颈工序机台总停机时间最短）为目标的数学模型。然后,设计了嵌入模型约束规则的车间智能物流调度算法,包括物料调度算法、AGV选择与路径规划、AGV碰撞避免策略设计等,并提出了另一种物料调度算法作为对照方案。最后,通过仿真实验与分析,证明了所设计模型及智能物流调度算法的高效性及适用性,给予车间管理人员相应的管理启示。     

基于网络教学平台的智能组卷算法研究

智能组卷是目前个性化网络辅助教学中的一个重要的组成部分和研究方向,高效、合理的的智能组卷算法才可以协助教学平台实现个性化的教学分析、组建合理的教学策略,最大程度的实现智能化的辅助教学。本文首先介绍了智能组卷算法目前基本性况,并针对自动组卷的特点和要求,分析了基于网络教学平台的智能组卷算法设计,对实现高效的智能组卷算法具有一定的参考价值。     

工程制图智能电子习题集软件系统的设计与实现

对工程制图智能电子习题集软件系统的设计进行了深入探讨,分析了对图形支撑平台系统的要求,提出一个开放的由习题库、答案库和习题三维模型库组成的电子习题集图形库系统;对工程制图作业的智能批改策略进行了深入探讨,包括工程制图习题作业自动批改要求、自动批改处理策略及一个基于图形特征结构的智能匹配的图形几何匹配方法;提出一个基于正向推理的图形匹配识别算法。     

基于适应性相关测试和点斜式查表求交的圆形窗口快速裁剪方法

在智能CAD、图形识别与理解等复杂图形应用系统中,由于图元数量多、图元间关系复杂,且系统实时交互响应要求较高,现有圆形窗口裁剪算法较难满足要求.为此提出圆形窗口对线段的一种新的快速裁剪算法.该算法由基于切线分隔的圆外线段快速适应性测试方法、基于最小范围的圆内线段测试方法和基于点斜式查表的线段与窗口圆快速求交方法三部分组成.通过按端点位置选择适应的测试方法、尽量避免不必要的操作、尽量以简单操作代替复杂操作等措施,大大提高了圆形窗口对线段的裁剪速度.在图形识别及智能CAD等应用中的实验结果表明,采用文中算法可较大地提高效率.     

智能自动化技术在机械设计中的应用

智能自动化技术是在计算机信息技术与互联网等现代先进技术的不断发展与广泛应用的基础上实现的,它在机械设计与生产制造领域的应用实现,在推动机械制造行业的现代化发展同时,对智能化与信息化的进一步发展也起到了非常积极的作用和影响。该文在对智能自动化技术及其在机械设计中运用的有关原则分析的基础上,对智能自动化技术在机械设计中的具体应用进行研究为有关实践及研究提供参考。     

机器学习与医学装备智能化维修探讨

保障医学装备的正常有效运行,是医院业务正常开展的基本保证。随着大数据、人工智能技术的发展,医学装备故障智能化诊断在临床的应用成为可能。智能维修具有诊断速度快、自适应能力强等特点,可为医学工程人员提供有价值的故障判断参考。以机器学习技术为基础,阐述了实现医学装备故障智能化诊断的方法。利用故障信息知识库数据集,从监督学习算法、无监督学习算法和半监督学习算法等途径,说明实现医学装备故障智能维修的技术路线,并分析了不同算法的优点和特性。     

面向应急方案智能辅助生成的基于案例推理的模型研究

应急系统是应对突发应急事件的综合性决策指挥系统,而应急预案是应急决策的重要依据。由于突发应急事件的复杂多样,应急预案数量大而庞杂,亟需一个智能化模型完成应急预案的快速检索。该文提出了一种基于案例推理的应急预案的智能匹配算法,通过对应急预案的特征处理,建立智能推理模型,构建自学习能力,支持了快速高效的智能应急决策。     

发明初审智能审查规则引擎技术研究

随着我国创新能力和创新水平的提升,专利审查模式需要进一步转变和优化,同时,还需要加强专利审查的信息化、智能化水平,推进专利审查模式转变和国家知识产权战略目标的实现。本文即是针对发明初审的智能化审查与结合自身专利审查实践,重点研究了专利智能审查规则引擎技术、实现原理和应有功能,以期能将研究成果应用于专利审查智能化的实现,为进一步实现专利审查效率提升、审查质量的提高做一些有意的探索。     

土木工程制图作业批改系统的研究与实现

为了解决目前高校土木工程制图教学中,教师无法逐一批改学生作业的问题,该文在独立研发的矢量图形平台ATVGP的基础上,探讨了矢量图形的识别与作业批改系统的实现方案,并提出了一种曲线识别思路.最后在VC＋＋环境下编程,实现了土木工程制图作业的自动批改功能.     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to