An Intelligent Response Surface Methodology for Modeling of Domain Level Constraints

An effective modeling method of domain level constraints in the constraint network for concurrent engineering （CE） was developed. The domain level constraints were analyzed and the framework of modeling of domain level constraints based on simulation and approximate technology was given. An intelligent response surface methodology （IRSM） was proposed, in which artificial intelligence technologies are introduced into the optimization process. The design of crank and connecting rod in the V6 engine as example was given to show the validity of the modeling method.     

Semantic-Based Knowledge Categorization and Organization for Product Design Enterprises

Former knowledge engineering research aimed at boosting automatic reasoning.However recent knowledge management research focused on promoting the knowledge sharing and reusing among the people.Because of the different aims between the two directions,former knowledge representation schemata,such as rule based representation,frame from knowledge engineering research does not fit to the current knowledge management scenarios.In this paper,for the purpose of building knowledge management systems for product design enterprises,knowledge items are classified into seven types based on the semantics of their usage.Then their representations are discussed respectively.Based on the above classification,a knowledge representation meta-model and a basic domain ontology reference model for cooperative knowledge management systems are put forward.The reference model is an abstraction that can be reused and extended in knowledge management systems of different enterprises.Finally,the patterns of knowledge acquisition processes in cooperative knowledge management scenarios of product design processes are studied.     

工程设计知识表达体系

在研究当今人工智能知识表达模型的基础上,根据工程设计过程的特点,在参考与工程设计和智能ＣＡＤ系统开发实践中,提出了适合于工程能ＣＡＤ系统设计的工程设计知识表达体系,其中包括工程语言知识,工程数据表知识,工程设计示例知识和工程图形知识;开发了基于这几类知识的推理系统。     

逆向工程技术在公路设计领域的应用

阐述了逆向工程的基本概念、数据处理、实施步骤等关键技术及在公路设计领域的最新发展,并通过具体的实例介绍了在公路设计中利用CARD/1软件实现平交口旧路改造的逆向工程的应用.     

基于领域工程的应急决策支持系统

为了开发出软件复用度高、系统结构灵活性好、能够快速适应变化的应急决策支持系统,按照领域工程的开发步骤,使用UML建模工具,采用面向特征的领域分析技术,提出基于领域工程的应急决策支持系统构件开发方法;得出了横切竖割、构件编织、分层设计的构件模型,构件模型可以按照用户需要进行组合,从而提高了这类系统的开发效率和质量．     

结合忻阜高速谈曲线梁桥设计

结合工程实例,详细分析了曲线梁桥的受力、建模、结构设计要点,总结出曲线梁桥区别直线梁桥的特点,指导实际设计过程,有针对性与可操作性,避免工程人员因认识不足而造成工程事故.     

Web Data Cube Construction in Multidimensional On-line Analytical Processing Environment

Introduction Using data warehousing and on-line analyticalprocessing (OLAP) technology, leaders of businessorganizations can gain insight into the global marketand make sound business decisions quickly to ensurethat the organization will excel in the ever…     

基于管理职业素质形成的学生工作平台设计

我们通常习惯把学生作为被管理的对象来施加我们的教育思想与教育内容,文章分析了其弊端,提出了管理设计的动力学机制及管理设计的一般原则,运用系统工程思想与项目管理工具,进而提出了基于管理职业素质形成的学生自我管理的工作平台设计,此设计包括了设计导向即思想设计、硬件设计与软件设计三个组成部分。     

Surge Response of a Compliant Offshore Structure by Time Domain Simulation

A single-degree-of-freedom equation of motion was used for modeling a compliant offshore structure exposed to viscous hydrodynamic loads. The equation of motion contains nonlinearities in the forms of both Duffing stiffness and Morison drag force with current. The water particle velocity and acceleration for calculating the Morison inertia and drag forces are modeled as Gaussian processes based on a Pierson-Moskowitz (P-M) elevation spectrum. The single-degree-of-freedom equation of motion containing different ocean current values are then numerically integrated via a fourth-order Runge-Kutta scheme. Time trajectories of the surge response displacements of the offshore structure and the response probability density curves are obtained. Furthermore, the ocean current influences on the response central moments up to the fourth order are studied. A literature review reveals that this is the first treatment of such a pair of nonlinearities in time domain. The simulation results are analyzed, and some conclusions valuable for engineering design are pointed out.     

铁路工程形象进度图参数化生成系统研究

研究并实现了基于B/S模式的铁路工程形象进度图参数化生成系统(PIPGS).根据铁路工程进度管理的需要,构建PIPGS的体系结构,设计系统的功能模块与合适的数据模型;建立VML代码后台化机制,获得了基于图形元件的工程形象进度图参数化生成方法;给出了PIPGS的关键技术与操作流程.PIPGS在工程中的应用效果表明,其具有良好的易用性、可复用性与扩展性.     

公路排水新理念浅析

采用公路排水新理念,介绍了201线公路坎川岭～老道排段旧路改造中公路排水的设计与方法,旨在为今后类似工程的排水设计提供参考.     

工程设计知识库管理系统研究

从知识系统的基本原理出发,讨论了知识操作系统的作用与功能要求,介绍了基于规划控制下的二阶段设计型的工程知识库系统,在此基础上设计开发了工程设计知识库管理系统。     

支持数据挖掘的知识库系统

总结了用于数据挖掘的6种类型领域知识．据此，提出了索引知识加领域知识的2级知识组织方法，前者相当于知识目录，根据知识特征要素对后者编号．领域知识库包括规则、函数、层次知识和基本信息4个子库．讨论了多种类型领域知识的语法校验内容，指出领域规则的矛盾性具有结论矛盾、可信度矛盾和包含矛盾3种表现形式，冗余性具有等价冗余、包含冗余、条件冗余3种表现形式，并给出了校验算法．基于上述研究成果，开发了支持数据挖掘的知识库系统KB4DM．     

Key Technology of 3D Geosciences Modeling in Coal Mine Engineering

A new method for simulation technology of laneway engineering seamless excavation based on 3D geoscience modeling(3DGM)was proposed to overcome the deficiency in current research.The generalized triprism(GTP)data model was used as the basic modeling element in this method.The models of geological body were created by the method of rock pillar body partition(RPBP)modeling.The laneway engineering models were built with component method,while the corresponding triangles in sections were connected and transformed into tunnel GTP models.All the GTP models were converted into tetrahedron models based on the smallest vertex identifier(SVID).The simulation and spatial analysis of laneway engineering seamless excavation could be realized through the local hierarchical intersection(LHI)algorithm.The application case showed that the method was fast and effective,and it could meet the needs of design and spatial analysis for mine laneway engineering.     

Semantic driven design reuse for 3D scene modeling

The increasing scale and complexity of 3D scene design work urge an efficient way to understand the design in multi-disciplinary team and exploit the experiences and underlying knowledge in previous works for reuse. However the previous researches lack of concerning on relationship maintaining and design reuse in knowledge level. We propose a novel semantic driven design reuse system, including a property computation algorithm that enables our system to compute the properties while modeling process to maintain the semantic consistency, and a vertex statics based algorithm that enables the system to recognize scene design pattern as universal semantic model for the same type of scenes. With the universal semantic model, the system conducts the modeling process of future design works by suggestions and constraints on operation. The proposed framework empowers the reuse of 3D scene design on both model level and knowledge level.     

轮机英语中介词的语义动化

语义范畴的转换,尤其是由静态到动态的转换,是英语介词与汉语介词的重要区别之一。工科专业英语对简洁度和准确度的特别要求使得轮机英语中大量存在语义动化的介词。这些介词在语义指涉、句法功能、翻译方法、所接宾语等方面存在一定的特点,了解这些特点有助于学生更加准确理解并灵活运用轮机英语。     

STUDY ON CONFLICT MANAGEMENT FOR COLLABORATIVE DESIGN SYSTEM

IntroductionAdvances in computer networks and informationtechnology have enabled product designers tomore effectively communicate,collaborate,ob-tain and exchange a wide range of design re-sources during product development.ComputerSupported Cooperative Work( CSCW) describesa research area concerned with people working ingroups and computer systems supporting them,and collaborative design is an important applica-tion of CSCW.Collaborative design has typicallydistributed multiple functional…     

沥青路面的雨天行车安全性分析

针对沥青路面的路表轮胎行车滑水,提出了行车的临界水膜厚度概念,利用动量定理进行了临界水膜厚度计算公式推导,计算了不同行车速度下的路表临界水膜厚度,经与国外的极限车速计算经验公式对比,验证了其可靠性,并以降雨的路表水膜厚度为依据,分析了以临界水膜厚度作为道路结构设计控制指标的行车安全性,提出了增加安全性的工程技术改善措施．     

可转位车刀几何角度的智能化设计

本文着重讨论了可转位车刀几何角度优选智能设计的方法。从建立教学模型的基本原理出发，处理与分析了设计中涉及到的资料和信息，然后根据工程设计中的优化原则制定其数学模型，并将各类原始资料处理成工程数据库或知识库。     

锚喷支护设计专家系统的研究

锚喷支护设计专家系统（ＰＴＥＳ）是在广泛收集国内外锚喷支护设计的理论知识和广大支护专家群体丰富设计经验的基础上，结合国家标准锚喷支护设计规范，应用专家系统技术研制而成的。它是一个以人－机对话为主，具有多模块、多功能的智能化程序设计软件。它能模仿人类专家的思维方式和思维过程，最终根据工程类型、地质条件、围岩类别、工程断面形状和尺寸等因素确定工程的支护形式和支护参数。