复合型图书馆参考咨询服务的全新模式

阐述复合型图书馆信息资源多元化、信息存取扩大化、服务需求多样化的特点,着重对复合型图书馆的参考咨询服务模式进行探讨。     

专利—论文混合共被引网络下的知识流动探析

 专利参考文献中的科学论文、技术专利等引文,为研究高科技时代下科学技术相互融合中的知识流动提供了便利。在分析专利—论文混合共被引下的知识流动的基础上,以网络的属性“被引量”、“中介中心度”和“引用半周期”量化了知识流动中的“知识影响力”、“知识控制力”和“知识活力”,并以此表征了知识流动中的“高质量”文献,最终以R.E.Smalley的施引专利作为研究对象,进行了实证分析,探讨了技术进步下科学和技术在知识流动中的相互融合,验证了应用科学在技术进步中的相对重要性。     

国外混合动力汽车领域专利引证分析

通过专利引证分析方法对国外混合动力汽车技术进行了深入分析。运用专利可视化的理念及工具确定了该领域的优势竞争实体及核心技术要素,揭示了本领域技术先驱的发展、外围技术分布情况及整个领域核心技术的迁移路径,为我国该领域技术引进、研发方向的选择等竞争策略提供线索。     

Multi-objective comprehensive optimization of fuel consumption and emission for hybrid electric vehicles

Aiming to reduce fuel consumption and emissions of a dual-clutch hybrid electric vehicle during cold start, multi- objective optimization for fuel consumption and HC/CO emission from a TWC （three-way catalytic converter） outlet is presented in this paper. DP （dynamic programming） considering dual-state variables is proposed based on the Belhnan optimality principle. Both the battery SOC （state of charge） and the temperature of TWC monolith are considered in the algorithm simultaneously. In this way the global optimal control strategy and the Pareto optimal solution of multi-objective function are derived. Simulation results show that the proposed method is able to promote the TWC light-off significantly by decreasing the engine＇s load and improving exhaust temperature from the outlet of the engine, in comparison with original DP considering the single battery SOC. Compared to the results achieved by rule-based control strategy, fuel economy and emission of TWC outlet for cold start are optimized comprehensively. Each indicator of Pareto solution set shows the significant improvement.     

风光互补发电系统最大功率跟踪实现电路的研究

本文介绍了风光互补发电系统的构成,对发电系统最大功率跟踪问题进行了分析,研究了一种双输入DC/DC变换器的实现电路,研究结果表明该电路能很好的应用于风光互补发电系统,具有较高的实用价值。     

项目驱动的软件工程进化式教学方法

将迭代进化的思想引入软件工程课程的教学中,提出项目驱动的进化式的教学方法。该方法以达到实用程度的软件项目贯穿教学过程的始终,根据该软件开发的三次迭代,将教学过程分为三个阶段,各阶段分别采用"教师引导学习、教师指导实践、学生独立实践"的教学方式,使学生对软件工程原理和方法达到从认知到理解再到应用的进化式掌握。     

三层变分不等式问题的混合迭代算法

针对定义在均衡问题与不动点问题的公共解集上的分层变分不等式的解的问题引入了一种新的混合迭代算法,证明了在一定参数条件下的强收敛性．所提出的算法也解决了另一种三层变分不等式的解的问题,推广了相关文献的结论．     

矩阵方程AXB+CXD=F的两种参数迭代解法的讨论

讨论了求解线性矩阵方程AXB CXD=F的两种参数迭代方法,并分别分析了两种迭代方法的收敛性。     

The Market for Picasso Prints: A Hybrid Model Approach

Two basic approaches have been used by the literature focusing on the return to holding artistic works: the hedonic price model and the repeat-sales model. This paper provides a procedure for jointly estimating the two models in a way that take advantages of the unique information contained in each. A semiannual price index for Picasso prints is estimated by using a model derived from the basic framework of the hybrid models. The empirical results suggest that the hybrid model provides the most precisely estimated price index by reducing the level of price volatility.JEL Classification: C5, Z1p