数字图书馆中基于内容的视频拷贝检测关键技术研究

随着数字图书馆中数字视频资源的增长,数字视频版权保护问题逐渐暴露出来。基于内容的视频拷贝检测技术作为一种有效的版权保护技术,近年来逐渐受到研究人员的关注。本文对基于内容的视频拷贝检测的关键技术视频指纹提取和指纹匹配的研究成果进行了分析,总结了指纹提取和指纹匹配的研究现状,指出了该领域存在的问题,最后分析了该领域的发展方向。     

跨部门联盟的匹配因素与公司社会创业价值创造的关系研究

公司社会创业日益成为我国社会创业活动的重要内容，而跨部门联盟是其价值创造的必然工具。以我国10个具有代表性的公司社会创业项目为研究对象，采用扎根理论分析公司社会创业跨部门联盟匹配因素的内在构成以及其与价值创造的关联机理，归纳与提炼公司社会创业跨部门联盟的文化匹配、资源匹配和管理匹配3个关键匹配因素，并指出其对价值创造的作用存在互补或替代关系。本研究揭示了我国公司社会创业中跨部门联盟价值创造的路径，对于丰富和拓展公司社会创业和跨部门联盟理论具有一定意义。     

基于知识溢出机制的我国高校数字图书馆建设策略研究

文章通过分析目前我国高校数字图书馆建设现状,引出我国高校数字图书馆建设存在的问题。以此为基 础,将经济学中的知识溢出机制引入到我国高校数字图书馆建设中,从知识溢出的构成要素、实现过程等角度提出我国 高校数字图书馆资源与服务建设策略,包括分布式建设模式、市场化运作模式和科学管理机制。     

基于爬山法快速波形匹配的高频电源过程控制

提出了基于波形匹配的方法预测一次电流过零点,来提高高频电源输出功率.然而直接使用归一化互相关算法计算量大,速度慢.为了提高匹配速度,本文采用爬山法启发式搜索策略,实现了非遍历性搜索,并能快速找到最优匹配点.实验结果表明,爬山搜索算法性能优越,用于高频电源过程控制中是可行的,且具有快速性和较高的准确性,相比直接互相关算法...     

山东省产业结构优化升级中的人力资本适配性研究

产业结构的优化升级需要与人力资本基础相互协同。这种协同关系决定了产业结构优化升级的阶段、重点、路径和方式。山东省产业结构正在实现由"二、三、一"向"三、二、一"模式的转化,人力资本的数量和结构对这一转化的进程具有决定性作用。首先,人力资本水平决定了劳动力在三次产业之间的优化配置能力;其次,人力资本决定了技术进步的类型,从而也就决定了产业结构调整的速度和方式。三次产业区位商值的变化表明,山东省第一产业的比较优势正在丧失,而第三产业的比较优势开始逐步形成。所以,增加高层次人力资本投资,大力发展高新技术产业,已经成为山东省产业结构优化升级的内在要求。     

从分布式数据库技术角度看我国文献资源共享存在的问题

通过分析分布式数据库的分片技术、资源配置技术和系统设计策略,研究了这些技术在资源建设、分配和管理等方面对文献资源共享系统的意义,指出了现有文献资源共享系统的不足,为完善我国资源共享系统建设提供了依据。     

基于 Petri 网的分布式协同办公智能模 型简

介绍了Petri网的基本理论,分析了基于网络服务的分布式协同办公应用的特征,在此基础上提出了基于Petri网的分布式协同办公的通用智能模型,该模型具有语义明确、易于修改,并且易于验证的优点,最后以文档审批工作流为例给出了具体的模型实现过程．     

技能培训对新型职业农民收入水平的影响——基于PSM方法的实证研究

基于1 294位参与江西省"一村一名大学生工程"的新型职业农民的问卷调查数据,运用倾向性得分匹配估计法、中介效应分析法等计量方法,检验技能培训对新型职业农民收入水平的影响以及其可能存在的作用机理。基础结果表明:技能培训能够显著提升新型职业农民的收入水平。组群差异分析发现:技能培训能够提升未有过村干部经历的新型职业农民的收入水平;技能培训能够提升非农户及非农兼业户的收入水平。中介效应检验表明:社会资本能够强化技能培训对新型职业农民收入水平的影响。因此,要做好技能培训的顶层设计,加大技能培训的资金扶持力度以及精准定位技能培训主体与内容。     

Distributed leadership with the aim of ‘reculturing’: a departmental case study

This article considers a secondary science department that has, since 2000, developed distributed leadership as a form of human capacity building. Using a longitudinal ethnographic case study allowed us to consider how distributed leadership can be nurtured and developed in a department. Our analysis centres on two key issues: the nature and pattern of distributed leadership practices and the continuity that provides coherence to those practices. From our analysis, there appear to be two major conclusions. The first of these is the need for administrators to be purposeful in the appointments that they make to formal leadership positions. To enact distributed leadership practices requires leaders who can exercise both formal power and influence. The second conclusion relates to the time required for continuity of leadership practices to give rise to changes that lead to teachers managing the teaching and learning programme.     

Interrogating conceptions of leadership: school principals,policy and paradox

Currently educational research literature demonstrates wide discussion and endorsement of ‘distributed’ leadership while concurrently traditional, hegemonic forms prevail in practice. This article investigates understandings about educational leadership held by Australian school principals. The article describes the contradictory conceptions about educational leadership currently in circulation. It interrogates underlying assumptions and questions how both hegemonic and newer leadership conceptions and assumptions serve educational leaders. Data from principals around the country and across education systems reinforced the predominance of un-theorised or under-theorised notions about leadership, with similar assumptions found in important policy artefacts and practices. This article emerges from interviews with 100 principals focusing on their professional learning needs, which revealed interesting ideas, issues and dilemmas concerning ‘leadership’. It fills a gap in research on distributed leadership by exploring contradictions inherent in policy, practice and understandings in this area. The article is structured into four sections. First, extant literature on this topic and the research are explained. Second, the article focuses on principals' conceptions about leadership and those inherent within important policy and practical artefacts. A discussion of the findings focuses on the discrepancy between theory and policy endorsement and the views of practitioners. Finally, the article canvasses the implications of the research.