科创中国

通过对中关图书馆评估机构、统计工作及评估指标体系的介绍与比较研究,指出我国图书馆绩效评估存在的主要问题.运用案例分析方法,详细对比中关大学图书馆绩效评价体系,分析我国图工委图书馆绩效评估体系存在的不足,提出改进我国图书馆绩效评估的建议.

对档案利用服务质量的评价不能只停留于综合档案馆的自我评价,社会公众即档案利用者才是档案利用服务质量评价的主体力量.本文从利用者本位的视角出发,尝试提出了一种社会公众参与的档案利用服务质量评价的指标体系和评价量表,以期推动综合档案馆档案利用服务质量的规范化管理.

近年来,中国能源运输通道问题日益显现,以马六甲海峡及南海等区域最为突出.为解决我国能源通道安全受到严重制约的困局,利用因次分析法,依据评价指标体系建立的各项基本原则,针对出现的不同情况分别对传统运输通道与新路线做简要对比分析.在保证国内石油安全充足供应,尽可能降低物流成本的前提下,提出较为有效合理的对策和建议,对我国能源安全运输具有现实意义.

首先概述了第三方物流绩效评价管理体系规划和设计中应该注意的原则和事项,接着重点分析研究了第三方物流绩效评价的指标体系和内容框架,从内部绩效和外部绩效两个方面考察了其指标的设计和规划问题,主要从财务绩效、采购运输配送仓储等环节的功能性绩效以及客户绩效等方面进行了指标设计,最后在这些绩效评价指标体系的基础上,进行了第三方物流具体绩效评价流程和操作机制的数学计算过程推导.

In order to find a parameter as the evaluation index that can capture the effect of the interaction between asphalt and aggregate, the rheological properties of asphalt mastics using two kinds of asphalts and four kinds of aggregates under different filler-asphalt ratios were measured by a dynamic shear rheometer (DSR). Moreover, four rheological parameters of K.Ziegel-B, Luis Ibrarra-A, complex shear modulus ΔG*and complex viscosity Δη* for evaluating the interaction ability were studied. Results indicate that all the four parameters can characterize the interaction ability of asphalt and aggregate correctly and feasibly. Through the comparison of sensitivities and physical meanings of the four parameters, K.Ziegel-B with high sensitivity and exact physical meaning is finally selected as the evaluation index for interaction ability of asphalt and aggregate.

系统阐述了数据包络分析(DEA)的基本思想及其改进模型,在此基础上利用所构建的投入产出指标体系实证比较研究了2010年北京市、河南省、吉林省、江西省、山东省、福建省、宁夏回族自治区七大区域的物流效率,结论表明各区域效率由高至低依次为北京市、宁夏回族自治区、山东省、河南省、江西省、福建省、吉林省,其中北京和宁夏属于DEA有效,而这一结果具有较高的一致性与可靠性.

分析传统学术论文和开放存取论文现有评价方法的不足与困难之处;融合层次分析法和同行评议所具有的优势,提出开放存取论文评价的框架、流程以及具体实现方法.最后通过实验验证其评价效果,结果显示该方法的评价结果与文章的真实值相近.

Traditional model for calculating performance parameters of a fix-pad journal bearing leads to heavy workload,complicated and changeable formulae as it requires deriving various geometric formulae with different bearing types such as circular journal bearing,dislocated bearing and elliptic bearing.Considering different pad preload ratios for non-standard bearing,traditional model not only becomes more complicated but also reduces scalability and promotion of the calculation programs.For the complexly case of traditional model while dealing with various fix-pad journal bearings,unified coordinate system model for performance calculation of fix-pad journal bearing is presented in the paper.A unified coordinate system with the bearing center at the origin is established,and the eccentricity ratio and attitude angle of axis relative to each pad are calculated through the coordinates of journal center and each pad center.Geometric description of fix-pad journal bearing is unified in this model,which can be used for both various standard bearing and non-standard bearing with different pad preload ratios.Validity of this model is verified with an elliptical bearing.Performance of a non-standard four-leaf bearing with different pad preload ratios is calculated based on this model.The calculation result shows that increasing preload ratio of the pad 1 and keeping that of the left three pads constant improves bearing capacity,stiffness and damping coefficients.This research presents a unified coordinate system model unifies performance calculation of fix-pad journal bearings and studied a non-standard four-leaf bearing with different pad preload ratios,the research conclusions provides new methods for performance calculation of fix-pad journal bearings.

针对期刊评价实践中专家评审数据获取困难的问题,建议利用现有引文数据库提供的信息构建新型专家评议指标,以测度期刊在学科专家群体中的影响力.提出期刊z指数指标并以国内图情类核心期刊为例进行实证研究,认为该方法能有效获取可反映专家评价意见的客观数据,而且具有成本低、可信度较高等优势.

搜索引擎是当今人们获取信息的入口,百度指数反映了关键词被搜索的次数,直接衡量着投资者的有限关注.本文实证检验了百度指数和创业板股票市场表现的相关性,在此基础上,验证了投资者有限关注能影响股票的市场交易活动.投资者的有限关注能给股票带来正向的价格压力,而这种压力会很快发生反转.本文还利用百度指数逐日可测的优点,研究发现非交易日的投资者关注将显著影响下一交易日股票集合竞价时的价格跳跃.