为了激发学生的学习兴趣,文章以省级精品在线开放课程"花卉栽培"为例,首先分析了高职院校精品在线开放课程建设的必要性,然后探究了高职院校精品在线开放课程建设的策略.

Potential limiting device rail is an important part of the metro traction power supply system. In this paper, the rail potential limiting device of Xi'an metro line two as an example, discussed in detail the protection type, working principle, various protection test method, and the two typical faults are analyzed, with detailed description of the phenomenon and process.

According to development situation in the record component,design AVR filetype that is suitable for the multi-channel data record,and develop a common record component base on AVR,it's divided into record module and playback module,and research several key questions,lastly,analyse result of the record component example.

IPhone made by the company of Apple has aroused a great deal of concern on a global scale in 2007.It is a set of smart phone with mobile phone,media player,wireless network functions,and with better Internet features than traditional phone,supporting a lot of web applications.In the wireless Internet lifestyle,people need location-related information frequently.As the expanding of iPhone market,developing the web applications for iPhone,particularly developing LBS(Location Based Service) systems suit for the mobile application services,which is not only provide a more convenient living environment for people,but also can open up a huge emerging market for the GIS,mobile communications and Internet service providers.The article describes the telecom LBS system applying for iPhone based on GIS platform,including basic POI(Point of Interest),industry,public transport,roadway and other services.

通过对交通路网数据和导航需求进行分析与研究,抽象出导航算法的数据结构,建立了算法权值动态估计模型,并基于A*实现了导航算法.

Most of the access control system for current web application through the use of name and password to access control to its customers,not suitable for large-scale enterprise applications,in order to strengthen the management of web Access Control System,This paper introduces a PMI-based access control model RBAC.It also explained the characteristics of the model and its use in web applications.

在全面推进素质教育的今天,传统的教学方式已受到严峻的考验与挑战。自从多媒体应用于教学领域后,它对传统的教学手段和教学方法进行了革命。本文重点阐述了多媒体教学的优势、不足及改进意见。