港口物流指数的编制初探

从物流、港口、港口物流的概念入手,分析了影响港口物流指数的诸因素并由此建立了港口物流发展水平指标体系。运用主成分分析法对港口物流发展水平进行了分析,并得出了港口物流指数,。     

西部港口物流枢纽信息服务平台建设方案研究

本文基于西部港口物流枢纽信息服务平台在西部港口物流枢纽运营服务水平提升重要作用,通过对西部港口物流枢纽信息服务平台服务需求及功能分析,研究提出了西部港口物流枢纽信息服务平台总体架构。     

Research on an Urban Traffic Control System Based on DGPS

The basic principoles of GPS(Global Positioning System)and DGPS(Differential GPS) are described.The Principle and structure of vehicle navigation systems,and its application to the urban traffic flow guidance are analyzed.Then,an area-corrdinated adaptive control system based on DGPS and a traffic flow guidance information system based on DGPS are put forward,and their working principles and functions are researched.This is to provides a new way for the development of urban road traffic control systems.