脂肪干细胞在组织工程中的研究进展

随着组织工程技术的不断发展,种子细胞的来源问题已经成为制约其发展的一个重要的因素,,自脂肪间充质干细胞发现以来,人们对其的研究不断深入。近几年,越来越多的实验证实,脂肪间充质干细胞可以向成骨细胞、成软骨细胞、神经细胞、肌细胞和脂肪细胞等不同胚层来源的细胞分化。而且脂肪组织来源广泛、取材容易、便于自体移植：脂肪间充质干细胞在体外长期培养的过程中始终保持其多向分化潜能、遗传背景相当稳定、体内植入后少有免疫排斥的问题,因而是一种非常理想的组织工程种子细胞。     

多相流量计的原理与开发应用简介

多相流量技术就是将一种多相流量计直接安装在油气集输管线上，采用先进的测量技术，对油、气、水三相在不分离情况下进行连续、在线和自动计量，从而可以取代传统的由测试分离器及其辅助系统组成的计量装置，简化油气生产工艺流程，降低投资，减少操作成本。它可根据应用场合采用不同精度等级的多相计量装置，直接对油井产出液中的油、气、水三组分进行计量。     

国内外科技旅游的发展及研究综述

随着全球旅游业的迅猛发展、科学技术的不断进步、“科技”与“旅游”的逐步结合,科技旅游蓬勃兴起,已成为现代旅游业的重要组成部分,并在旅游实践中发挥着越来越重要的作用。文章针对国内外科技旅游发展情况及研究状况进行了综述,并结合国内外科技旅游发展及其研究的对比分析,对我国科技旅游的开发研究进行了展望。     

基于专利技术关联度的中间人角色划分方法研究

基于专利数据构建的发明人合作网络有助于分析发明人中间人角色,揭示发明人创新合作规律,对于企业研发人才管理和知识管理具有重要指导意义。群体划分是中间人角色划分的一个关键步骤,以往文献大多基于网络结构或者给定网络边界进行群体划分,忽视了专利发明人的知识交流环境和特征。鉴于此,基于专利技术关联度,利用专利著录项中的IPC分类号信息判断企业发明人所属技术知识领域,再以技术知识领域为边界设计一套算法,将发明人归入互斥子群,最终对中间人角色进行高效划分,寒武纪公司数据验证了中间人角色划分算法具有较高的准确性和有效性。     

Innovation Performance in New Product Development Teams in China's Technology Ventures: The Role of Behavioral Integration Dimensions and Collective Efficacy

In emerging markets, technology ventures increasingly rely on new product development (NPD) teams to generate creative ideas and to mold these innovative ideas into streams of new products or services. However, little is known about how behavioral integration (a behavioral team process) and collective efficacy (a motivational team process) jointly facilitate or inhibit team innovation performance in emerging markets—especially in China, the world's largest emerging‐market setting with collectivist and high power distance cultures. Drawing on social cognitive theory and behavioral integration research, this article elucidates the relationships between behavioral integration dimensions (i.e., collaborative behavior, information exchange, and joint decision‐making) and innovation performance and also examines how collective efficacy moderates these relationships in China's NPD teams. Results from a sample of 96 NPD teams in China's technology ventures reveal that information exchange is positively associated with innovation performance. Collaborative behavior positively but marginally influences innovation performance, whereas joint decision‐making does not relate to innovation performance. Moreover, collective efficacy demonstrates an important moderating role. Specifically, both collaborative behavior and joint decision‐making are more positively associated with innovation performance when collective efficacy is higher. In contrast, information exchange is less positively associated with innovation performance when collective efficacy is higher. This study makes important theoretical contributions to the literature on team innovation and behavioral integration in emerging markets by offering a better understanding of how behavioral and motivational team processes jointly shape innovation performance in China's NPD teams. This study also extends social cognitive theory by identifying collective efficacy as a boundary condition for the overall effectiveness of behavioral integration dimensions. In particular, this study highlights the condition under which behavioral integration dimensions facilitate or inhibit NPD team innovation performance in China.     

外商直接投资的环境效应--基于中国省级面板数据的实证分析

改革开放以来,规模持续扩大的外商直接投资在推动我国经济增长的同时,也给我国生态环境带来一定的负面影响。本文利用我国30个省(市、区)、1999～2004年度的面板数据,构建了一个经济计量模型,对外商直接投资的环境效应进行测度。计量结果显示,外商直接投资对我国生态环境具有显著的负面效应:就全国总体情况而言,三资工业企业总资产每增加1%,工业废气排放量增加0.358%。进一步对东、中、西部三大区域的研究表明,与外商直接投资在我国的区域分布特征相一致,外商直接投资对我国生态环境的负面效应也呈现出明显的东高西低的梯度特征。文章最后提出了相关政策建议。     

Regulatory incentives and financial reporting quality in public healthcare organisations

English National Health Service Foundation Trusts are subject to a regulatory regime in which the level of monitoring and intervention is determined by performance against two key performance metrics: a ‘financial risk rating’, based on a number of performance metrics, such as the reported surplus margin and return on assets, and a ‘prudential borrowing limit’. In this paper, we investigate the variation in financial reporting quality, proxied by discretionary accruals, with the incentives introduced by this regime. We find: first, that discretionary accruals are managed to report small surpluses; second, that, consistent with the avoidance of regulatory intervention in both the short and medium term, discretionary accruals are more positive when pre-managed performance is below intervention triggering thresholds and more negative when well above threshold; third, that, despite a move away from financial breakeven as the primary performance objective, there remains an aversion to small loss reporting. We further find that the level of discretionary accruals is driven by two metrics of strategic significance: the surplus margin (a measure of retained earnings) and the prudential borrowing limit (a measure of borrowing capacity).     

上海市总部集群建设与区域创新发展

上海依托其金融、贸易、航运的中心地位,吸引大量的跨国公司总部进驻。近10来年,上海的总部经济规模迅速扩大,形成几个特大规模的总部经济集聚区,但其总部经济的发展也存在较大的问题,总部集群的要素集聚度低,总部集群的创新水平低,总部集群创新环境较差等问题。建设好上海的总部经济有其重要的现实意义,我们应大力提高总部经济的自主创新能力、促进创新环境的建设、构建创新要素的网络结构等。     

打开奖励的“薛定谔黑箱”:认知学派与行为学派的理论分野与整合

对经典激励理论的拉卡托斯批判揭示,在奖励与其行为结果之间横亘着一个社会心理"黑箱"。以Deci为代表的认知学派与以Eisenberger为代表的行为学派对奖励效果的论争长达二十多年。观点的对立不仅阻滞了理论的发展,也导致了实践者的无所适从。本文整合演化心理学和神经经济学观点,在厘清二者理论分野的基础上,从奖励的双重性和双路径动机性信息加工过程出发,引入角色知觉与认知框架,构建了一个整合的多路径模型,力图演绎和还原两种理论的冲突过程,并为整合和深化两种理论、提高奖励效果提出一系列假说。     

从词汇史看?木兰诗?的语言年代

从语言上看，?木兰诗?非北朝时所产生，很可能成诗于唐代前期。?木兰诗?中的很多词语都可见于唐代文献，如“鞍鞯”“点兵”“惊忙”“儿”“地”“爷娘”等。这些唐代新词在诗中出现比例较高，是该诗成诗于唐代的较好脚注。