地方高校图书馆电子资源优化配置方案研究

随着电子资源数量和需求的不断增加,地方高校在有限的资金条件下如何科学地采购电子资源,采购什么样的电子资源才符合读者需求和教学科研需要的问题日益突出,许多地方高校图书馆都需要一个具体可行的电子资源优化配置论证方案来指导电子资源采购,使所购资源发挥最大的效益。文中对地方高校电子资源的现状、问题和发展趋势进行了分析,提出优化配置的原则、方法和步骤,并进行了实证研究。研究中出现的很多问题和提出的方法、对策都具有普遍性,对地方高校每年的电子资源购置都将具有很好的参考价值。     

基于最优权值探测的图像可逆信息隐藏研究

提出一种基于最优权值探测的图像可逆信息隐藏算法。该算法改进了现有的预测方法,利用最优权值探测原理提高预测像素值的精确受,使预测误差差值直方图更加紧凑、峰值更高。实验结果表明,相比其它可逆嵌入算法．该算法在保证图像质量的同时,提高了嵌入容量。算法整体性能高。     

Retailer’Order Problem When Regret Factor is Considered

[Abstract]Traditional expected utility theory suggests that decision-makers are completely rational, but a large number of experiments and empirical studies have shown that decision-makers will be infl...     

跳远跑跳结合技术教学的优选练习手段

针对跳远助跑、起跳教学中存在的问题,优选出既有利于学生较快地掌握跳远助跑、起跳技术,又有利于提高学生的助跑速度和跳跃能力的练习手段用于教学,取得了较好的教学效果。     

网上培训(WBT)的基本形式和选择

WBT是远程职业培训方案的基本组成部分,分为网络个别化培训、网络电子绩效支持系统、网络虚拟异步课堂、网络虚拟同步课堂等形式,分别适合于认知学习的不同目的和类型,以及学习者的需要和条件,本文结合实例介绍这些形式的特点和选择因素。     

Eliciting Mathematics Interest: New Directions for Context Personalization and Example Choice

Building on common assumptions in theories of interest and mathematics education, this experimental study examined the effect of context personalization based on individual preferences, group personalization, and example choice with preselected popular examples on middle school students' situational interest and performance in mathematics. Participants (N = 713) learned a principle in probability calculus in one of four instructional conditions. Individual interest and perceived competence were examined as moderators on triggered and maintained situational interest, perceived value, task effort, and performance. Results showed that example choice triggered situational interest in the learning activity and that context personalization influenced perceived value and effort, contingent on students' perceived competence and individual interest in mathematics. We discuss results in relation to previous findings on interest-based interventions and the theoretical and practical implications.     

农村公共产品供给:现实挑战与发展选择

农村公共产品是具有非竞争性和非排他性,用于满足农村公共需要的产品。公共产品从理论上分析应该由政府提供,但由于混合产品的存在也为其他主体参与农村公共产品的供给提供了理论支持。现阶段,我国农村公共产品供给不容乐观,存在供给总量不足、供给主体失衡等问题。本文结合我国农业产业化发展的趋势,提出通过引入多元化主体、推动城镇化建设、健全农村金融市场、深化税费改革等措施构建农村公共产品有效供给机制。     

Honey-bee mating optimization (HBMO) algorithm for optimal reservoir operation

In recent years, evolutionary and meta-heuristic algorithms have been extensively used as search and optimization tools in various problem domains, including science, commerce, and engineering. Ease of use, broad applicability, and global perspective may be considered as the primary reason for their success. The honey-bee mating process has been considered as a typical swarm-based approach to optimization, in which the search algorithm is inspired by the process of real honey-bee mating. In this paper, the honey-bee mating optimization (HBMO) algorithm is presented and tested with a nonlinear, continuous constrained problem with continuous decision and state variables to demonstrate the efficiency of the algorithm in handling the single reservoir operation optimization problems. It is shown that the performance of the model is quite comparable with the results of the well-developed traditional linear programming (LP) solvers such as LINGO 8.0. Results obtained are quite promising and compare well with the final results of the other approach.     

试析新版电视剧《红楼梦》总体构思的失误

新版电视剧《红楼梦》在播出前已炒作得沸沸扬扬,但播出后反响却普遍欠佳,笔者认为该剧是一部不成功的作品,其原因主要是编导总体构思的失误。该剧的改编对原著思想意蕴、审美理想的领悟存在着较大的偏差,电视剧影像的处理存在着多方面不妥当之处,同时,部分重要演员的选择也不符合角色要求,且表演不够到位,这些是造成该剧失误的主要原因。     

论重复囚徒困境博弈中的逻辑选择及其应用

在重复囚徒困境博弈中,同样结构的博弈被反复地进行,参与者的最佳策略选择主要依赖于对手可能采取的策略和他们对抵赖和坦白如何作出选择。有限次重复博弈在决策行动时一般使用逆向归纳法,即从重复博弈的最后一个回合开始往前推理从而决定每一步的选择。在无限次重复博弈中,对于任何一个参与者的欺骗和违约行为,其他参与者总会有机会给予报复。