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为节约管理系统开发成本、缩短系统开发时间,基于 J2EE 进行企业管理模板开发。模板前后端分离开发,后端以 Spring Boot 为核心架构,开启二级缓存;前端采用 Vue.js、Element-UI 模板引擎框架,使用椭圆曲线加密（ECC）保证数据传输安全,并采用 Redis 为二级缓存,MySQL 为持久化数据库,使系统对数据的访问变得高效且灵活,通过 Git 和 Jenkins 实现项目的持续集成与部署。实际开发测试结果表明,该模板可直接使用,普遍缩短了开发时间（20~30 天）,并有效节约了开发成本。模板具备可维护性与可扩展性,使用敏捷开发方式让开发者与甲方能够及时沟通,从而对开发作出及时调整,因此可广泛应用于实际系统开发中。 相似文献
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弗朗西斯·詹金斯·奥尔科特是美国儿童图书馆事业的奠基者之一。1898年她成为匹茨堡卡内基图书馆儿童部首位负责人,在她的领导下,卡内基公共图书馆儿童服务广泛延伸到社会各个阶层;她首次开设儿童图书馆员培训班,培训班很快发展成为一所专业的、授予证书的培训学校。卡内基图书馆还是美国第一个制定儿童服务发展标准的组织有序的公共图书馆。奥尔科特的儿童图书馆实践与研究是世界儿童图书馆事业的宝贵财富,对处于“十四五”开局之年的我国儿童图书馆谋划更好地开展弱势儿童扶贫工作具有重要的借鉴意义和现实价值。 相似文献
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In this paper, we use time series analysis to evaluate predictive scenarios using search engine transactional logs. Our goal is to develop models for the analysis of searchers’ behaviors over time and investigate if time series analysis is a valid method for predicting relationships between searcher actions. Time series analysis is a method often used to understand the underlying characteristics of temporal data in order to make forecasts. In this study, we used a Web search engine transactional log and time series analysis to investigate users’ actions. We conducted our analysis in two phases. In the initial phase, we employed a basic analysis and found that 10% of searchers clicked on sponsored links. However, from 22:00 to 24:00, searchers almost exclusively clicked on the organic links, with almost no clicks on sponsored links. In the second and more extensive phase, we used a one-step prediction time series analysis method along with a transfer function method. The period rarely affects navigational and transactional queries, while rates for transactional queries vary during different periods. Our results show that the average length of a searcher session is approximately 2.9 interactions and that this average is consistent across time periods. Most importantly, our findings shows that searchers who submit the shortest queries (i.e., in number of terms) click on highest ranked results. We discuss implications, including predictive value, and future research. 相似文献
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利用Gram矩阵的正定性 ,建立了广义的Jenkins型不等式 .它的特殊情形是Jenkins不等式的一个改进 相似文献
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This article addresses the question of how to account for the growth in vocabulary knowledge that occurs during the elementary school years. Areas examined include the ways that word meanings are communicated, direct teaching of meanings vocabulary instruction as a part of reading instruction, and deriving and learning word meanings from verbal context. Taken singly, neither direct instruction of meanings nor learning word meanings from context seems to account all that well for the growth in vocabulary that is thought to occur. 相似文献
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