平面热源法瞬态测量材料热物性的研究

简述了平面热源法瞬态测量材料热物理性质的基本原理,分析了快速法、脉冲法测量存在的问题。在此基础上,研究了材料热物性瞬态自动测量技术。测量实践表明:瞬态自动测量仪测量准确可靠,与用防护热板法测量的结果也符合得很好。     

论专利制度的基本功能

促进科学技术进步和经济社会发展是专利法的终极目标,也是专利制度的主要功能。但是,在我国,专利制度功能的基本构成却常为人们所忽视。创新经济学认为：创新不断扩散,是技术创新社会经济效益的根本来源。《专利法》第26条规定的发明公开制度作为授予专利权的条件之一,对促进技术创新的扩散具有重要价值,体现了专利制度的终极目标。它教导该领域的普通技术人员实施发明（教导功能）,体现了发明人真正做出了发明创造（占有功能）,促进了技术信息和权利信息的传播（信息传播功能）,从而实现增进人类知识积累的专利法目标。从制度功能来看,实现专利制度基本功能的重要载体是专利文献。     

Parameter estimation for multivariate diffusion processes with the time inhomogeneously positive semidefinite diffusion matrix

Statistical inference for the diffusion coefficients of multivariate diffusion processes has been well established in recent years; however, it is not the case for the drift coefficients. Furthermore, most existing estimation methods for the drift coefficients are proposed under the assumption that the diffusion matrix is positive definite and time homogeneous. In this article, we put forward two estimation approaches for estimating the drift coefficients of the multivariate diffusion models with the time inhomogeneously positive semidefinite diffusion matrix. They are maximum likelihood estimation methods based on both the martingale representation theorem and conditional characteristic functions and the generalized method of moments based on conditional characteristic functions, respectively. Consistency and asymptotic normality of the generalized method of moments estimation are also proved in this article. Simulation results demonstrate that these methods work well.     

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.     

LAN property for an ergodic diffusion with jumps

In this paper, we consider a multidimensional ergodic diffusion with jumps driven by a Brownian motion and a Poisson random measure associated with a compound Poisson process, whose drift coefficient depends on an unknown parameter. Considering the process discretely observed at high frequency, we derive the local asymptotic normality (LAN) property.     

Three layers of history in recurrent social movements: the case of food reform

Using the understudied genre of food reform movements for illustration, we advocate greater attention to recurrent social movements. Analysis of these movements calls for combining three levels of historical analysis. One links the incidence and character of mobilization to long-term, large-scale historical changes; the second shows how periods of activism are also animated and shaped by specific historical contexts; and the third tracks legacies from earlier to later periods, thus both tracing additional causal influences and connecting separate cases into coherent sequences. The social movements literature includes excellent examples of each type of historical account. Combining types is much less common. Doing so, we contend, offers methodological advantages for scholars comparing and sequencing mobilization around similar problems in different historical periods. We develop the argument from three eras of food protest: Grahamites in the 1830s and early 1840s, dietary reformers and food safety campaigners of the late nineteenth and early twentieth centuries, and organic advocates who gained popular support beginning in the late 1960s.     

西部地区旅游产业转型升级中的科技支撑——以云南省为例

科技推动旅游产业的发展,旅游转型升级需要强化科技支撑。西部地区经济相对落后,创新能力较低,旅游业科技应用与研发水平不高,旅游科技发展亟需创新思路和工作方法,应以技术引进为基础,以技术扩散为重点,以技术创新为辅助,重点加强技术引进和扩散,大力推进模仿创新,积极培育自主创新。现阶段应制定激励政策,引导科技、教育、研发机构、行业协会形成合力,发展技术市场和中介组织,培育旅游科技应用与创新示范企业,推进智慧景区、智能酒店、数字化旅游城市试点建设。     

Modeling the impact of supra-structural network nodes: The case of anonymous syringe sharing and HIV among people who inject drugs

Networks are well understood as crucial to the diffusion of HIV among injection drug users (IDUs), but quasi-anonymous risk nodes - such as shooting galleries - resist measurement and incorporation into empirical analyses of disease diffusion. Drawing on network data from 767 IDUs in Bushwick, Brooklyn, we illustrate the use of calibrated agent-based models (CABMs) to account for network structure, injection practices, and quasi-anonymous transmission in shooting galleries. Results confirm the importance of network structure and actor heterogeneity to the magnitude and speed of HIV transmission. Models further demonstrate that quasi-anonymous injections in shooting galleries increase the speed of HIV diffusion across the whole network and have the greatest impact on HIV seroconversion levels for IDUs at the network periphery. Shooting galleries are shown to be transmission hubs that operate independently of traceable structural ties, linking otherwise unconnected network components. CABMs potentially increase understandings of HIV diffusion dynamics by infusing computer simulations with empirical data.     

小众传播与新媒介文化

随着技术的进步和新媒体的出现,当今一个传播形式的新特点就是,由传统的“大众传播”向“小众传播”转移深入,同时也就产生了与以往媒介文化有所不同的新媒介文化。对于当前的新媒介文化形成、发展和演变的机制极其规律的探索,必将成为当代文化传播研究的一个重要课题。     

基于过程划分的可再生能源技术扩散模型

把握技术扩散的机理和主要特征是可再生能源发展规划和管理优化的基础。本文基于信息扩散、技术经济、社会认可度等因素对可再生能源技术的影响及其作用机理分析,根据投资者状态变化,将技术扩散过程划分为技术获悉、效益计算和技术认可三个阶段,构建了可再生能源技术扩散(即潜在投资者转变为最终投资者)过程的数理模型。探讨了可再生能源技术扩散的速度有限性、政策效率递减性以及区域差异性三个关键特征,结合算例验证模型并进一步分析了技术扩散的不同驱动力,从而为可再生能源技术扩散机理政策制定提供理论支持和意见建议。