An ontology-based approach for formalisation and semantic organisation of conformance requirements in construction

This paper presents an ontology-based method for the formalisation and application of construction conformance requirements for effective code checking. This research continues our work on the development of a generic model automating the conformance checking of construction projects against building codes. We start from the analysis of the related research on the formalisation and organisation of building codes that allows us to formulate our approach for semantic annotation and scheduling of conformance requirements for conformance checking task. Our approach comprises 5 main steps: formalisation, semantic annotation, classification, context-based scheduling and semantic search of conformance requirements. They are implemented as corresponding key components of the C3R (Conformance Checking in Construction — Reasoning) prototype that we have developed to model the conformance checking process in construction. Finally, we discuss the ongoing work and perspectives of our research: the validation of our model by construction practices and the enrichment of our approach by usage-based knowledge.     

中美两高校物理化学课程教学的对比

物理化学课程是化学、化工、生物工程、环境工程、材料工程等专业的一门重要的专业基础课。为了适应社会发展的需要,物理化学课程教学的改革势在必行。笔者观摩了美国田纳西大学物理化学教学的全过程,受到了一些深刻的启示和借鉴,认为借鉴美国高校物理化学教学的先进经验,将以教师为中心的教学模式转变为以学生为中心的教学模式,是提高物理化学教学效果的一个有效途径。     

信号交叉口公交专用进口道设置方法的探讨

在信号交叉口设置公交专用进口道可减少公交车辆在信号交叉口的停车延误,是实施公交优先的有效技术措施之一。近年来,为体现公交优先,我国少数大城市的一些信号交叉口设置了公交专用进口道,但一些公交专用进口道的设置还不尽合理。为此,分别按直行、左转、右转公交专用进口道来分析各自设置方法,并对公交专用进口道的设置条件和设置长度进行了分析。     

Networked Space

Dennis Shelden , Chief Technology Officer at Gehry Technologies, asserts ‘a networked spatial approach to design informatics’ that brings together a spatial understanding with a current knowledge of geometry, the digital and modern communications. This emphasises the connections between not only forms and objects in space, but also among disciplines in a collaborative practice context and of the Web itself. It is a connectedness that has been further facilitated by the adoption of 3-D building information modelling (BIM) that helps to streamline processes and facilitate better communication among disparate members of the design team.     

A Wave Approach to Signal and Noise Modeling of Dual-Gate MESFET

A new procedure for signal and noise modeling of dual-gate MESFET is described in this paper. The small-signal model is based on two cascoded single-gate MESFET intrinsic equivalent circuits embedded in a network representing device parasitics. The wave interpretation of noise is used for defining the noise parameters of each single gate MESFET. Applying this approach, a CAD oriented procedure for extracting the dual-gate MESFETmodel parameters as well as the noise wave temperatures is developed. Modeled scattering and noise parameter characteristics are comparedto the measured ones and quite a good agreement is observed.     

浅谈文宾山矿区资源挖潜的途径与方法

通过对文宾山煤矿地质构造、开采历史、采掘现状的分析,采取加强技术管理,突破地质找煤瓶颈等措施,增加了空白带、构造带、复采带的煤炭资源储量,保证了矿井均衡稳产。     

电气信息类专业创新与研究项目的设计与实现

围绕国家对电气信息类专业创新与研究人才需求,以交通电气信息为特色,构建以创新和研究能力为主线的螺旋式、多层次实践教学新体系。结合一个完整船舶电气实例,从其数学模型出发,自行创建封装同步发电机各阶次模型,搭建多机电力系统故障模型。研究各阶次同步发电机模型对电力系统暂态稳定性影响,并得出相应结论。实例给出创新与研究项目设计实现的方法和思路。     

基于模糊综合评价的聚类分析在电力负荷建模中的应用

阐述了在电力负荷建模中,统计综合法建模是以典型用户的选取为基础的,在此基础上,通过分析变电站综合负荷的构成以及用户设备容量比例,提出了基于模糊综合评价的聚类和模糊C均值聚类两种方法,并对某市工业典型用户进行分类,结果表明基于模糊综合评价的聚类分析能够克服模糊C均值聚类法中主观差异性对分类的影响,概念更为清晰,聚类结果更为合理。     

变电站综合自动化系统通信安全性评估

为了对电力系统中的综合自动化通信进行有针对性的安全评估,提出一套系统全面地评估其通信网信息安全性的方法.分析了中国电力系统中综合自动化通信的现状及安全方面的脆弱性,给出指标建立原则和方法,根据普遍认可的信息安全国际标准和中国电力通信标准制定了各项评估指标,对各指标权重值进行了分配.最后通过对变电站与中心站通信的实例进行安全性评估,并对评估结果与实际情况进行比较、分析,从而验证该方法的合理性和可操作性.     

基于相量量测的电力系统谐波状态估计(I)--理论、模型与求解算法

通过分析现有网络谐波分析理论的局限性与实践中所遇到的困难,提出了基于相量量测的电力系统谐波状态估计算法.选择节点电压作状态量,节点电压、支路电流与注入电流作量测量,建立了各种量测配置的量测方程以及谐波状态估计问题的数学模型.然后,通过总结谐波状态估计算法的基本特点与优化量测方程和母线的编号,提出了谐波状态估计的分层算法,大幅度降低了量测矩阵的维数.