The Application of RFID Technologies in Construction

RFID technologies have advanced greatly and deployed successfully in many industry sectors in recent years. Construction industry could benefit from the applications of RFID technologies but as yet has not found sufficient application areas. This project gives a comprehensive awareness of the RFID technologies, which focus on the investigation on the UK construction industry. The current status of RFID in construction and its potentials are specified in the analysis of questionnaires and case studies. Finally, basing on the investigations, some further tasks in developing RFID technologies are carried, including some recommendations, for the construction industry.     

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研究了求解城市交通连续网络设计问题的模拟退火算法参数选择原则。采用双层规划模型来描述固定需求下的城市交通连续网络设计问题,其中上层问题的目标函数为整个网络的总阻抗和总投资额之和,下层问题则是用户平衡配流模型。利用模拟退火算法求解上层模型,下层模型则采用基于路径的GP算法进行求解。本文首次采用了灵敏度分析方法分析参数选择对模拟退火算法求解连续网络设计问题影响,比较了各个参数对算法结果及时间的影响,确定了参数的选择原则。根据上述分析方法得到的参数选择原则来设定参数的取值,能够提高算法的执行效率和收敛精度。     

Improved Algorithm about the Maximum Flow in Road Network Using Auxiliary Graph Theory

In road network planning, locating the key sections will be very useful to solve the traffic bottleneck. Locating the key sections is equal to finding the maximum flow. To begin with, this paper analyzed and compared kinds of methods solving the network maximum flow problem. Second, this paper pointed out a convenient method based on the auxiliary graph theory and Dijkstra method. That is to say, the method could be used to get the minimum cutset and the maximum flow using the shortest path algorithm, and the VC++ program was also used. Finally, based on the road network of Tianjin, an example was given for further explanation. Through comparison, we know that it is a convenient method to locate the key sections and can support the transportation planning and management with theoretical basis and data.     

Screening of hepatocyte proteins binding to NS5ABP37 protein by yeast-two hybrid system

Objective To investigate the biological function of NS5ABP37 and to look for proteins interacting with NS5ABP37 protein in hepatocytes. Methods We constructed bait plasmid expressing NS5ABP37 protein of hepatitis C virus (HCV) by cloning the gene of NS5ABP37 protein into pGBKT7, then the recombinant plasmid DNA was transformed into yeast AH109 (α type). The transformed yeast AH109 was mated with yeast Y187 (α type) containing liver cDNA library plasmid in 2×YPDA medium. Diploid yeast was plated on synthetic dropout nutrient medium (SD/-Trp-Leu-His-Ade) containing X-α-gal for selection and screening. After extracting and sequencing of plasmids from positive (blue) colonies, we made a sequence analysis by bioinformatics. Results We screened twenty-five proteins binding to NS5ABP37, including Homo sapiens cyclin Ⅰ (CCNI) gene, Homo sapiens matrix metallopeptidase 25 (MMP25) and Homo sapiens talin 1. Conclusion The yeast-two hybrid system is an effective method for identifying hepatocyte proteins interacting with NS5ABP37 of HCV. And the biological function of NS5ABP37 may be associated with glycometabolism, lipid metabolism and apoptosis.     

城市公交线路车辆配置模型研究

本文在研究公交客流出行特性基础上构建了公交线路车型结构优化模型,在确定线路配车数的基础上进行了运力规划的冗余优化,进而确定了该线路的车辆规模。     

不同溶剂对大马士革Ⅲ玫瑰叶绿素的萃取效果

采用分光光度法,对比研究了丙酮、乙醇以及不同体积比的丙酮与无水乙醇混合液5种提取液对大马士革Ⅲ玫瑰叶绿素萃取效果的影响,以筛选最佳提取条件。结果表明,常温下,丙酮和无水乙醇的1∶1混合液对大马士革Ⅲ玫瑰叶绿素的提取效果较好。     

北京南站交通协调综合模糊评价分析

通过分析北京南站客运枢纽的交通协调现状,确定影响城市大型枢纽站交通协调的主要因素,建立城市大型枢纽站交通协调的评估指标体系,并利用AHP法确定该指标体系中各层影响因素的权重.用模糊综合评判法,对北京南站的交通协调进行综合评估.     

中心城区单向交通组织方法研究

单向交通是通过对交通流的优化组织,尽可能地利用现有道路资源、挖掘道路交通潜力、均衡路网流量,以对局部的限制来保障全局的畅通,并最终实现交通流安全运行而采取的一种交通管理措施。以我国典型的组群特色城市淄博为例,利用宏、微观结合的一体化分析方法对其中心城区旧城区路网组织及交通流特点进行深入的研究,提出并模拟验证单向交通组织方案,可为决策提供依据。     

基于线框模型的白车身刚度定性仿真

提出一种参数化白车身线框几何模型的构建方法,基于此线框模型快速建立白车身刚度计算有限元模型,实现了概念设计阶段白车身刚度的定性评价.以某白车身为例,计算了概念设计阶段定性仿真模型与详细设计阶段定量仿真模犁的弯曲刚度和扭转刚度.计算结果表明,概念设计阶段和详细设计阶段的弯曲刚度与扭转刚度值均在相差10%左右.     

基于道路和台架的制动器振动噪声试验方法研究

介绍了汽车制动器振动噪声试验方法的研究状况,针对基于整车的道路试验和基于试验台的台架试验,从试验方法的特点及适用性、评价方法、具体试验操作程序、测试手段及数据分析与处理等方面对两种试验进行了阐述和对比分析,指出了制动器振动与噪卢试验方法的发展趋势.