基于公交IC卡数据的OD推算技术研究

公交OD矩阵是进行公交调度和公交线网优化的基础资料.随着公交IC卡技术的广泛应用,如何利用IC卡的数据信息来推算公交OD矩阵以及换乘次数、出行次数等公交出行信息,具有很强的现实意义和实用价值.通过对IC卡统计数据特点的分析,利用数据挖掘技术,分别对公交线路站点OD和区间出行OD的推算方法进行了研究,并进一步研究了如何从IC卡统计数据中得到公交出行的其他信息.分别给出了由IC卡统计数据推算公交线路站点OD和区间出行OD的方法,并提出了基于GIS的公交IC卡数据分析处理系统框架,建立了系统分析流程来实现公交OD的推算.通过分析发现,公交IC卡的数据分析处理最终要建立起能将数据库的处理功能和地理空间的属性特性结合起来的地理信息系统,才能够有效地解决公交OD推算、换乘次数以及出行次数等问题.     

新能源汽车蓄电池亏电及智能补电分析

蓄电池作为新能源汽车的重要组成部件,其亏电问题备受主机厂和用户的关注.文章从用户数据出发,借助相关统计分析方法,对新能源汽车蓄电池的亏电问题和亏电预警进行分析,提出了一种智能补电的方法,有效地降低了蓄电池亏电问题.     

IC卡的个人导向功能在城市轨道交通中的应用

介绍日本新一代非接触式IC卡系统的构想及其三大功能,提出IC卡的个人导向功能在城市轨道交通中的具体应用方法,以及可期待的乘客服务质量的改善效果.     

重卡自适应巡航控制系统的标定测试设计及开发

随着重卡行业驾驶员趋向于年轻化,可以实现自适应巡航控制功能的牵引车成为新一代干线物流行业的首选产品。对此,介绍了自适应巡航控制系统在重卡上的标定开发与应用实践,为其他高级驾驶辅助系统的标定开发提供参考。     

基于随动式激光雷达的港区无人驾驶集卡控制算法研究

我国已有多个港口建设了无人化港区,实现了车辆的自主调动。无人化港口建设的主流技术是以提前埋设磁钉或磁条作为车辆的导航感应系统,这种方式定位精度高且技术相对成熟,但适用于新建港口且成本相对较高,而对于生产作业繁忙的老旧港口并不适用。传统港口一般使用集装箱卡车作为船侧与岸侧之间的转运交通工具。文章设计了将随动式激光雷达应用于港口无人驾驶集卡上,通过分析车辆运行规律,确定该方案的可行性。针对此类集卡提出了优化调度算法,结合实际数据进行对比,在实现安全生产的同时,进一步降低设备成本,实现高效的运营效率,为智慧港口建设港区车辆调度提供了一种新的解决方法。     

岩溶区桥梁冲孔灌注桩埋卡锤的处理措施

分析了冲孔灌注桩施工过程中出现卡锤事故的原因,介绍空心锤冲孔提锤法处理岩溶地区某桥桩基冲击成孔时埋卡锤事故的方法,提出了空心锤的加工制作要求、空心锤冲孔提锤的施工方法及要点。     

餐饮营业数据库中关联模式的卡方分析

系统分析了餐饮企业数据的特点,基于关联规则和卡方分析理论,建立了餐饮营业数据库中关联模式的卡方分析模型.以某餐饮企业70万条原始数据为例,利用数据挖掘技术生成关联规则,将统计学中的列联表卡方分析引入到关联模式的相关性度量,通过卡方分析方法检验Apriori算法生成的规则,对规则前件与后件之间的相关性进行度量,开展对关联模式卡方检验的实证分析,从统计意义上分析规则是否关联及有效,剔除无用规则或误导规则.结果表明:列联表卡方分析适用于具有分类特征的样本间差异性的检验,在支持度度量的基础上引入卡方检验能有效地对非相关模式进行删减,减小频繁项集和关联规则的规模.     

Genotypic diagnosis of long QT syndrome by analysis of candidate genes

Objective To diagnose 6 LQTS families by genetic analysis. Methods A total aof 6 LQTS pedigrees with 43 family members were brought together for genetic diagnosis by using short-sequence tandem-repeat (SIR) markers or sequencing. Genomic DNA was extracted from blood samples by standard procedure. STR markers or KCNQ1, KCNH2 and SCN5A were amplified. The haplotype analysis for LQTS was performed. If the family got the negative haplotype analysis, the sequencing was performed. Results LQTS patients were always linkaged with the SCNSA gene in family 1. KCNH2 was linkaged with the disease in family 2 to 5.21 gene carriers were identified from these 5 families. A mutation (A561V-KCNH2) was only found in the proband of family 6 and an SNP (G1691A) was found in all the members of the family. Conclusion Genetic diagnosis can not only improve presymptomatic diagnosis,bnt also provide the basis for personal therapy and research on disease-causing mutations.     

Construction of expression vector for NT4-ADNF-9 fusion gene

Objective To construct the prokaryotic expression vector bearing fusion gene NT4-ADNF-9 and lay foundation for further study on genetic therapy of neuraseusory deafness. Methods By means of asymmetrical prince/ template, double stranded eDNA of activity dependent neurotrophic factor-9 (ADNF-9) was obtained, which included restriction enzymes sites on the two extremities. ADNF-9 eDNA was ligated to the signal and leader peptides of nenrotrophin 4 (NT4), and the fusion gene was named NT4-ADNF-9. Then it was suheluned into prokaryotic expression vector pBV220, and called pBV220/ NT4-ADNF-9. Results Evidences of DNA sequence analysis and restrtction enzymes digestion showed that we recombined ADNF-9 eDNA to the 3'terminal of the signal and leader peptides of NT4, and the fusion gene was subcluned into pBV220 successfully. Bioactivity of the products was proved that it could support the cell survival and neurite growth in the primary cultures of dorsal root ganglia (DRG) of embryonic day-8 cbicken neurons as compared to the control. Conclusion Prokaryotic expression vector pBV220/NT4-ADNF-9 can be constructed successfully and the bioactivtty is satisfactory.