课程文献中心 更多>>

关键词： 信号   数据库功能   应急恢复  

摘要： 为最大限度地降低设备故障对运营造成的影响,基于广州地铁6号线信号系统数据库集群系统恢复难度大、恢复时间长(超过24h)的情况,探讨快速恢复数据库功能的具体应急方法。

关键词： IEC   SC   IEEE   软件   信息技术   in   for   of   ISO/IEC JTC1   数据库语言   数据库管理系统   NP  

关键词： 结核,肺   病例管理   数据库管理系统   视频督导  

摘要： 目的 初步分析互联网＋手机视频督导在结核病患者治疗管理中的应用情况.方法 采用前瞻性队列研究的方法,选取深圳市龙华区慢性病防治中心2017年1月1日至2017年4月30日登记治疗的肺结核患者为研究对象,共纳入182例.收集并分析不同特征患者在视频督导系统上传服药的记录情况.结果 182例研究对象,服药次数为7841次,在系统中上传服药信息6000次（76.5％,6000/7841）,其中5043次（84.1％,5043/6000）是在发送提醒信息之后上传.服药视频上传率与性别、年龄、民族和治疗种类有关：女性的上传率为79.8％（1839/2305）,高于男性的75.2％（4161/5536）（χ^2=19.34,P＜0.01）;20～39岁组上传率为77.2％（5205/6745）,高于19岁以下组的71.6％（293/409）（χ^2=11.55,P=0.003）;少数民族患者上传率为72.4％（870/1201）,低于汉族的77.3％（5130/6640）（χ^2=13.15,P＜0.01）;复治患者上传率为96.6％（28/29）,高于初治患者的76.4％（5972/7812）（χ^2=6.50,P=0.011）.结论 大部分肺结核患者能接受并按要求配合互联网＋手机视频督导;需要加强对20～39岁以外人群、男性、少数民族、初治患者督导的培训和指导.

关键词： 数据库   数据库管理系统   SQL   MySQL  

摘要： SQL是Structured Quevy Language(结构化查询语言)的缩写。SQL是专为数据库而建立的操作命令集,是一种功能齐全的数据库语言。SQL功能强大、简单易学、使用方便,已经成为了数据库操作的基础。MySQL是开放源码软件,具有体积小、速度快的特点本文通过一个详细的案例介绍了SQL查询语言在MySQL平台中的基础性应用,并进行了相关的分析。

关键词： Oracle数据库   内存分配   内存优化  

摘要： 本文主要介绍Oracle数据库的内存组成,各部分内存如何分配与优化,包括SGA区、PGA区等。

关键词： 古树名木资源   数据库系统   陕西省   图文   软件系统   资源普查   监测管理   办公室  

摘要： 6月16日，陕西省绿化委员会办公室组织验收组，对“陕西省古树名木图文数据库系统”项目进行验收，这是继2015年研发并为基层配发全省古树名木资源普查软件系统后，实行古树名木资源网络动态监测管理的新举措。

关键词： 数据库系统  

ISBN: (纸本)9787567304925

摘要： 本书将触觉型学习引入教学范畴, 使其与听觉型、视觉型相结合, 采用“先行后知”的教学理念进行本科生教学。为了能够让学生“先行”, 我们用截图的方式, 把数据库教材中的主要知识点, 绘制成图, 并配以操作步骤。让学生先按图学做, 做完后课堂再分析概念内涵和讲解工作原理。这种方式使学生的学习效率大大提高, 工程实践能力普遍增强。本书共分十个实验。前五个实验是数据库课程的基本实验; 后五个实验针对数据库的实际应用, 难度较大。

关键词： Mobile database systems   Cluster heads   Multiversion   Concurrency   Replication and query  

摘要： In mobile ad hoc network, the existing replication technique and multiversion scheme increase the cost of overhead. In addition, there is possibility of mobility- and energy-related issues. In order to overcome these issues, in this paper, we propose a hierarchical replication and multiversion concurrency control model for mobile database systems. In this technique, cluster heads (CHs) are selected based on the distance from the past node movements. When the client raises a query, the database server distributes the replicated data to the nearer cluster heads. When any CH observes that one of its members is about to move, then it suggests the nearest cluster having the same data object to the moving client, so that it can quickly access the data during its movement. For concurrency control, each CH maintains a concurrency table for each of its replicated data object. By simulation results, we show that the proposed technique reduces the overhead and energy consumption.

关键词： 数据库系统  

ISBN: (纸本)9787564748173

摘要： 本书主要内容包括: 数据治理概述、主数据、元数据、数据质量、数据库原理、数据治理的实施、数据治理的审计、数据治理战略和团队建设等。

摘要： Back ground: one of the priority objectives of the Health sector Transformation Plan of Ethiopia is reducing maternal mortality. Knowing the right causes of maternal deaths through use of valid and reliable information is crucial to design appropriate policies, programs, and interventions to prevent avoidable deaths. Maternal Death Surveillance and Response system is a method of collecting information on the level and causes of maternal death in order to provide precise information to improve quality of maternal health. The quality of MDSR data base management system has not been adequately studied in our country. Objective: To evaluate the quality and measure the coverage error of MDSR database management system in Ethiopia. Methods: Institutional based cross-sectional study design with quantitative and qualitative method applied. The MDSR database with data from December 2006 through February 2009 E. C was analyzed using STATA version 14. Point and interval estimates were used to measure the coverage error of maternal death by relating reported death with estimated death for the country and regions. Besides, content errors of the data base were measured by using fundamental quality dimensions completeness, timeliness and consistency. Moreover, the challenges and limitations of the MDSR database system were assessed through thematic analysis of qualitative data collected from key informants who were heavily involved in the development and management of the MDSR database. Result: The overall coverage rate of national MDSR database was 2.98 % with 95% CI (2.85, 3.11) which was below expected level. The incompleteness rate of variables on the database ranged from the minimum of 2.2% to the maximum of 97.2% which was far from acceptable range (80%). The timeliness of national MDRF report was 56.8% which was less than 80% and there were also inconsistent variables on the data base, high gravidity among teenagers and higher number of parity compared with gravidity for so