新能源汽车政策效应：规模抑或创新中介？

中国新能源汽车产业补贴政策初衷是激励企业通过研发创新形成全球竞争力，结果却短期内促进了产业规模的快速提升，企业研发投入积极性反而严重不足。现有研究认识到企业行为会影响政策传导效用，但未从政策作用点与传导路径视角深入剖析政策对于企业行为的影响。本文综合运用内容分析法与Bootstrap中介效应模型，将文本分析与实证有机结合到一起，纳入企业规模与企业专利行为作为中介变量，分两条路径对二者的不同作用进行了对比分析。实证研究结果表明：政府支持显著促进了企业绩效、规模与专利产出的提升，且企业规模与专利行为在政策对绩效影响中存在显著的中介作用，其中企业规模的中介效用强于专利行为。新能源汽车双积分等新补贴政策应综合考虑制度、补贴工具及产业特征等因素影响，避免政策在“政府-企业界面”产生偏移。     

浅析自举电容C的作用

放大电路引入自举电容C可改变电路的有关特性，本文以OTL放大电路为例，阐述引入自举电容后，对电路性能的影响，这是文献[1]，[2]涉及而未解决的问题。     

“Snow Fall”-ing Special Collections and Archives

“Snow Fall” is a Pulitzer Prize winning, digital storytelling project produced by the New York Times. It represents the next step in long-form digital journalism. The web application tells a compelling story about the fate of sixteen skiers and snowboarders during an avalanche. The textual element of the story is wrapped in a slick interface with gently appearing and disappearing images, strategically positioned HTML5 video and image slideshows, maps, and 3-D visualizations. Its title, “Snow Fall,” has become a verb in the digital journalism world. Upon seeing “Snow Fall” and other similar projects, the authors started to make the connection between this form of storytelling and Special Collections. Special Collections are full of interesting, rich, and unique stories. Their digital representation, however, while widespread in systems such as ContentDM, can be lacking in sensory appeal. Because of this, the authors developed a “Snow Fall”-like application for a Special Collections’ exhibit, “Cradle of Coaches,” in the fall of 2013. In addition to this exhibit, they have developed two more using the same template. They feel that this is a new and exciting medium to tell the stories within special collections and archives, as well as general stories about libraries themselves.     

质量管理在制造技术与企业绩效中的中介效应检验 ——基于Bootstrap法的结构方程分析

摘要：以重庆市制造企业为样本,运用基于Bootstrap的结构方程方法,对质量管理在先进制造技术与企业绩效间的中介作用进行了实证检验。中介效应的三步检验结果表明：先进制造技术对企业绩效的直接作用并不显著;先进制造技术对质量管理、质量管理对企业绩效均有显著的直接影响,质量管理活动在先进制造技术和企业绩效的关系中起到了完全的中介作用。中介效应的进一步分析显示,先进制造技术通过对质量管理核心活动与基础活动的递进作用,最终经由员工管理和流程管理活动间接改善了企业的绩效水平。     

自举式扫描电路的时间误差

引入了时差概念 ,分析了自举式扫描电路的相对时差及其与补偿系数m、电源利用系数 η和非线性系数ε之间的关系 ,并且归纳了一个近似公式 ,简化了计算 .     

Windows NT引导错误的修复

介绍了在 Window NT(以下简称 NT)的使用过程中 ,如果 NT的引导出现错误 ,在不重新安装 NT的情况下 ,如何对一些错误进行准确判断 ,并对其进行修复的方法。     

Are Robust Standard Errors the Best Approach for Interval Estimation With Nonnormal Data in Structural Equation Modeling?

When the multivariate normality assumption is violated in structural equation modeling, a leading remedy involves estimation via normal theory maximum likelihood with robust corrections to standard errors. We propose that this approach might not be best for forming confidence intervals for quantities with sampling distributions that are slow to approach normality, or for functions of model parameters. We implement and study a robust analog to likelihood-based confidence intervals based on inverting the robust chi-square difference test of Satorra (2000). We compare robust standard errors and the robust likelihood-based approach versus resampling methods in confirmatory factor analysis (Studies 1 & 2) and mediation analysis models (Study 3) for both single parameters and functions of model parameters, and under a variety of nonnormal data generation conditions. The percentile bootstrap emerged as the method with the best calibrated coverage rates and should be preferred if resampling is possible, followed by the robust likelihood-based approach.     

The Construction and Interpretation of Differential Ability Patterns

Increasing the correlation between the independent variable and the mediator (a coefficient) increases the effect size (ab) for mediation analysis; however, increasing a by definition increases collinearity in mediation models. As a result, the standard error of product tests increase. The variance inflation caused by increases in a at some point outweighs the increase of the effect size (ab) and results in a loss of statistical power. This phenomenon also occurs with nonparametric bootstrapping approaches because the variance of the bootstrap distribution of ab approximates the variance expected from normal theory. Both variances increase dramatically when a exceeds the b coefficient, thus explaining the power decline with increases in a. Implications for statistical analysis and applied researchers are discussed.     

深究互补功率放大电路的工作原理

本文以OTL电路为例，细致分析了互补功放电路的工作原理，并着重研究了该电路结构中的特殊性。从理论上探讨了其在实际工作中可能引起的问题和解决办法。     

A Study of the Relationship between the Diets and the Health of 25 Negro Families in Scotland Ville,Louisiana

Using a hypothetical data set, the authors provide concrete examples to illustrate that canonical correlation analysis is a general linear model, subsuming other parametric procedures as special cases. Specific statistical techniques included in the analysis are t tests, Pearson correlation, multiple regression, ANOVA, MANOVA, and discriminant analysis. The discussion is aided by an initial explanation of the logic of canonical analysis. Further, similarities between the canonical technique and other univariate and multivariate procedures are highlighted. The treatment is intended to reiterate a framework in which statistical concepts can be presented to students.