零部件进口对中国制造业技术进步的影响

在中国制造业转型时期,零部件进口对促进我国技术进步至关重要,将出口品国内技术含量作为衡量技术进步的标准,对零部件进口与中国制造业技术进步的关系进行量化分析。研究结果表明:扩大零部件进口规模对技术进步有正向影响,但发挥作用存在一定时滞,且在高技术行业中促进作用尤为显著;扩大零部件进口种类能显著促进技术进步,主要体现在低技术行业;外商直接投资、人均资本和研发投入均对技术进步有正向影响,但对不同技术层次行业的影响程度存在差异。     

The role of events in ICT adoption: same-sex marriage and Twitter

ICT adoption is predominantly considered as a process conditioned by social structures, social situations of adopters, and attributes and features of technologies. What is often overlooked are the cultural forces that shape adoption experiences and processes. This paper focuses on events and event narratives as vehicles through which the efficacy of culture unfolds in technological change processes. Cultural sociology has shown how influential events can be for forming public opinions and facilitating collective action. This article considers the power of one event on a much smaller scale: the passage of same-sex marriage (SSM) law in New York in June 2011 was not only significant for marriage equality in the US but also for the operating logic of the news ecosystem in which the political decision was made ? the state house in Albany. For the journalists who covered this event on the ground, the SSM decision was the catalyst to fully embrace Twitter. Years later, the event still served as an exemplar for the potentials of Twitter and as a basis of legitimacy of associated tweeting practices reporters incorporated. This contribution is based on ethnographic research at the state house in Albany, analysis of tweets and legacy news coverage published during that period, and in-depth interviews with reporters.     

河南省生产率进步及其因素分解——基于DEA-Malmquist指数的市级数据分析

运用DEA．Malmquist指数分析法对18个市2000-2009年间的全要素生产率进步及其因素分解分析的结果表明：河南各市全要素生产率增长十分强劲，年均达14．7％，且落后地区具有明显的追赶趋势，但近几年下滑趋势明显。进一步的实证分析说明，技术进步是推动全要素生产率增长的主要动力，而综合技术效率和纯技术效率的下降则是制约TFP提升的瓶颈因素。因此，要遏制全要素生产率的下滑势头，就必须大力推进科技进步、提升技术效率和规模效率。     

新课改背景下数学师范生专业技能培养的探究

介绍新课改对数学教师的新要求,设想数学师范生专业技能的结构,并对数学师范生专业技能的培养原则及其措施进行了探究.     

A simple algorithm for calculating values for folded normal distribution

Folded normal distribution originates from the modulus of normal distribution. In the present article, we have formulated the cumulative distribution function (cdf) of a folded normal distribution in terms of standard normal cdf and the parameters of the mother normal distribution. Although cdf values of folded normal distribution were earlier tabulated in the literature, we have shown that those values are valid for very particular situations. We have also provided a simple approach to obtain values of the parameters of the mother normal distribution from those of the folded normal distribution. These results find ample application in practice, for example, in obtaining the so-called upper and lower α-points of folded normal distribution, which, in turn, is useful in testing of the hypothesis relating to folded normal distribution and in designing process capability control chart of some process capability indices. A thorough study has been made to compare the performance of the newly developed theory to the existing ones. Some simulated as well as real-life examples have been discussed to supplement the theory developed in this article. Codes (generated by R software) for the theory developed in this article are also presented for the ease of application.     

Disability,family and technical aids: a study of how disabling/enabling experiences come about in hybrid family relations

Research regarding disabling situations generally focuses on disabling situations within a public society ‘out there’. In our research, however, the intimate family setting itself appears central to the emergence of dis/enabling experiences. Moreover, the relationships that shaped these experiences not only involve human family members but also the technical aids associated with people’s specific impairments. Biographical narratives with users of three different technical aids including hearing aids, arm prostheses and incontinence products demonstrate that studying the making of (dis)ability in hybrid family settings is essential for understanding the emergence of (dis)ability in general.     

论“学报体”及其改良

"学报体"指发表在我国社科学术期刊上的文章所体现出的某些共性,既涉及题材内容,又涉及风格气象。我国社科期刊自创立至今,事实上存在着作为"正体"的和作为"伪体"的两种"学报体"文章,前者应得到护持,后者应受到贬斥。"正体"文章之长的主要体现是:分学科门类表述高深问题研究新得;举充分依据细密论证大小论点;以人文关怀给力社会发展;有较多行文规范服务内容表达。"伪体"文章之弊主要表现为:形式完备而内容贫瘠;"八股化"程度严重;缺少淑世情怀。当今"学报体"文章的改良,应先从三个方面做起:变文章评价由"重量轻质"为"重质轻量";变文章体式由"一体独大"为"众体并茂";变文章语言由"重质轻文"为"质文双重"。     

现代汉字设计字体的规范运用及其社会价值

汉字设计字体是现代经济社会高速发展的产物。从文字学角度看，汉字设计字体的出现不是偶然的．社会发展以及入本能的内在需求要求汉字创新求善，并且它的出现符合汉字自身的发展规律。这种设计字体与规范汉字从字形、字音、字义方面既有区别又有联系，以其独特的形式获得强烈的视觉感染力。它使信息传播差异化．有利于普及汉字知识教育和美育，同时具有创造和审美价值。这些潜在的社会价值为汉字设计字体进一步发展打下坚实基础。     

标准化政策对主食产业化的影响

实现主食产业化发展，实行产品的标准化是关键。以豪特林（Hotelling）线形选址模型和塞洛普（Salop）的圆周模型为基础，根据具体情况进行修改后建立一个三阶段的博弈模型讨论主食企业和政府的行为问题。     

Reliability of global sensitivity indices

Uncertainty and sensitivity analysis is an essential ingredient of model development and applications. For many uncertainty and sensitivity analysis techniques, sensitivity indices are calculated based on a relatively large sample to measure the importance of parameters in their contributions to uncertainties in model outputs. To statistically compare their importance, it is necessary that uncertainty and sensitivity analysis techniques provide standard errors of estimated sensitivity indices. In this paper, a delta method is used to analytically approximate standard errors of estimated sensitivity indices for a popular sensitivity analysis method, the Fourier amplitude sensitivity test (FAST). Standard errors estimated based on the delta method were compared with those estimated based on 20 sample replicates. We found that the delta method can provide a good approximation for the standard errors of both first-order and higher-order sensitivity indices. Finally, based on the standard error approximation, we also proposed a method to determine a minimum sample size to achieve the desired estimation precision for a specified sensitivity index. The standard error estimation method presented in this paper can make the FAST analysis computationally much more efficient for complex models.