公交IC卡数据处理的换乘矩阵构造方法研究

针对在城市公交换乘枢纽选址中换乘量调查所面临的困难,利用了公交IC卡的大量信息,并对其进行处理,得出城市公交线路间的换乘量,进而得到城市公交换乘矩阵,并结合长春市公交换乘枢纽规划实例,将该方法应用到城市公交换乘枢纽选址中去.     

一种机械加工参数速查卡的设计

本文通过对目前查询机械加工相关参数进行分析,设计了一种机械设计及加工参数速查卡,介绍了速查卡的组成结构、工作原理.解决了机械设计及加工参数复杂的查询及计算过程问题,确保了参数查询的准确性,有效的提高工作效率.     

Analyzing year-to-year changes in public transport passenger behaviour using smart card data

In recent years, there has been increased interest in using completely anonymized data from smart card collection systems to better understand the behavioural habits of public transport passengers. Such an understanding can benefit urban transport planners as well as urban modelling by providing simulation models with realistic mobility patterns of transit networks. In particular, the study of temporal activities has elicited substantial interest. In this regard, a number of methods have been developed in the literature for this type of analysis, most using clustering approaches. This paper presents a two-level generative model that applies the Gaussian mixture model to regroup passengers based on their temporal habits in their public transportation usage. The strength of the proposed methodology is that it can model a continuous representation of time instead of having to employ discrete time bins. For each cluster, the approach provides typical temporal patterns that enable easy interpretation. The experiments are performed on five years of data collected by the Société de transport de l’Outaouais. The results demonstrate the efficiency of the proposed approach in identifying a reduced set of passenger clusters linked to their fare types. A five-year longitudinal analysis also shows the relative stability of public transport usage.     

Impacts of weather on public transport ridership: Results from mining data from different sources

The existing studies concerning the influence of weather on public transport have mainly focused on the impacts of average weather conditions on the aggregate ridership of public transit. Not much research has examined these impacts at disaggregate levels. This study aims to fill this gap by accounting for intra-day variations in weather as well as public transport ridership and investigating the effect of weather on the travel behavior of individual public transit users. We have collected smart card data for public transit and meteorological records from Shenzhen, China for the entire month of September 2014. The data allow us to establish association between the system-wide public transit ridership and weather condition on not only daily, but also hourly basis and for each metro station. In addition, with the detailed trip records of individual card holders, the travel pattern by public transit are constructed for card holders and this pattern is linked to the weather conditions he/she has experienced. Multivariate modeling approach is applied to analyze the influence of weather on public transit ridership and the travel behavior of regular transit users. Results show that some weather elements have more influence than others on public transportation. Metro stations located in urban areas are more vulnerable to outdoor weather in regard to ridership. Regular transit users are found to be rather resilient to changes in weather conditions. Findings contribute to a more in-depth understanding of the relationship between everyday weather and public transit travels and also provide valuable information for short-term scheduling in transit management.     

A Self-Encryption Remote User Anonymous Authentication Scheme Usina Smart Cards

Remote user authentication is essential in distributed network environment to protect unauthorized access of a networked system. However, most of those existing remote user authentication schemes have not provided the user identity anonymity, while user anonymity is particularly important in some practical applications. Therefore, based on self-encryption mechanism, a new remote user authentication scheme was proposed. The scheme not only has no need of maintaining a password table at the remote server, but also can protect the user＇s anonymity.     

高分辨率等离子体显示屏的应用及其驱动系统原理分析

在机车的显示与诊断系统中，使用高分辨率平板显示器已成为一种趋势。本文详细介绍了等离子体显示屏及其驱动系统的工作原理。     

基于IC卡技术的高安全性门禁系统

研究并设计了一种可联机使用也可单独使用的高安全性的无线IC卡读写模块，它以AT89C51单片机为微控制器，以MFRCS00芯片为IC卡读写器，构建了一个使用简单的IC卡读写系统。该系统基于MFRC500芯片构成读写模块，并对微控制器与读写芯片的通信方式作了详细介绍。该系统的最大特点在于其通信过程中使用高安全性的数据加密算法。     

A Self-Encryption Remote User Anonymous Authentication Scheme Using Smart Cards

Introduction Remoteuserauthenticationschemesarevery usefulindistributedsystemssincetheycanguar-anteeonlythelegalusershaverighttovisitthere-sourcesprovidedbytheremoteservers.There-fore,overthepastyears,manyremoteuserau-thenticationschemes[1-8]havebeenproposed.In1981,Lamport[1]proposedthefirstwell-known passwordauthenticationschemeusingapassword tabletoachieveuserauthentication.However,Lamport'sschemesuffersfromtheriskofamodi-fiedpasswordtableandthecostofprotectingand maintainingthepasswordtabl…     

类BP神经网络的公交一卡通跨区消费推算模型

结合BP神经网络的建模方法,首次提出跨区消费分布矩阵的推算模型,并根据实际应用情况来设置误差阀值和学习率等关键参数,通过训练实际一卡通消费数据,得到跨区消费分布矩阵,实际输出数据误差在允许的范围内.实验表明该模型适用于跨区消费分布情况的预测,可为省域公交一卡通提供重要的决策支撑数据.