高炉渣显热综合利用浅谈

本文介绍了目前高炉渣处理、回收利用的现状,提出了热量回收问题的新方法。高炉渣干法新技术有望解决其渣粒化及热量回收的问题,是高炉渣处理利用的发展趋势。     

Minimax optimal control of linear system with input-dependent uncertainty

In this paper, the quadratic minimax optimal control of linear system with input-dependent uncertainty is studied. We show that it admits a unique solution and can be approximated by a sequence of finite-dimensional minimax optimal parameter selection problems. These finite-dimensional minimax optimal parameter selection problems are further reduced to scalar optimization problems which also admit unique solutions. Thus, the original minimax optimal control problem is solved via solving a sequence of simple scalar optimization problems. Numerical experiments are presented to illustrate the developed method.     

Lyapunov-based design of locally collocated controllers for semi-linear parabolic PDE systems

The design problem of collocated feedback controllers is addressed in this paper for a class of semi-linear distributed parameter systems described by parabolic partial differential equation (PDE), where a finite number of local actuators and sensors are intermittently distributed in space. A Lyapunov direct method for the exponential stability analysis of the resulting closed-loop system is first presented for the system, in which the first mean value theorem for integration and the Wirtinger's inequality are employed. The corresponding stabilization condition is then derived through the analysis result. Finally, the proposed design method is implemented on the feedback control of a fisher equation and its effectiveness is evaluated through simulation results.     

Does the Great Firewall Really Isolate the Chinese? Integrating Access Blockage With Cultural Factors to Explain Web User Behavior

The dominant understanding of Internet censorship posits that blocking access to foreign-based websites creates isolated communities of Internet users. We question this discourse for its assumption that if given access people would use all websites. We develop a conceptual framework that integrates access blockage with social structures to explain Web users’ choices, and argue that users visit websites they find culturally proximate and that access blockage matters only when such sites are blocked. We examine the case of China, where online blockage is notoriously comprehensive, and compare Chinese Web usage patterns with those elsewhere. Analyzing audience traffic among the 1000 most visited websites, we find that websites cluster according to language and geography. Chinese websites constitute one cluster, which resembles other such geolinguistic clusters in terms of both its composition and its degree of isolation. Our sociological investigation reveals a greater role of cultural proximity than access blockage in explaining online behaviors.     

Generalized matrix projective synchronization of general colored networks with different-dimensional node dynamics

This paper investigates the generalized matrix projective synchronization problem of general colored networks with different-dimensional node dynamics. A general colored network consists of colored nodes and edges, where the dimensions of colored node dynamics can be different in addition to the difference of the inner coupling matrices between any pair of nodes. For synchronizing a colored network onto a desired orbit with respect to the given matrices, open-plus-closed-loop controllers are designed. The closed-loop controllers are chosen as adaptive feedback and intermittent controllers, respectively. Based on the Lyapunov stability theory and mathematical induction, corresponding synchronization criteria are derived. Noticeably, many existing synchronization settings can be regarded as special cases of the present synchronization framework. Numerical simulations are provided to verify the theoretical results.     

基于专利SAO结构的技术应用领域识别方法研究

论文提出了一种基于SAO结构的技术应用领域识别方法。首先提取专利摘要中的应用领域信息,然后利用自然语言处理工具获取其SAO结构,通过SAO结构之间的语义相似度计算,得到根据相似性聚类绘制的专利地图,实现技术应用领域的识别。最后以石墨烯传感器技术为例对所提出的研究方法进行了示范。本文提出的识别方法,可以实现技术按应用领域的划分,为技术跨领域应用研究奠定了基础。     

空间科学——我国创新驱动发展的重要阵地

文章概述了空间科学与空间科学卫星的特点,具体阐述了其在科学上的前沿性,在空间技术和相关高技术上的带动性,以及对国家政治、外交、国防和社会发展的重要作用,介绍了中科院正在实施的空间科学先导专项在科学前沿、技术带动和国际影响方面预计的成果产出,并对其后续发展提出了建议。     

基于政府角度的PPP项目融资效益研究—以BOT与BOO模式为例

公私合营的PPP模式能有效解决政府项目资金不足,其融资模式选择和评价成为重要问题。本文根据财务评价方法,提出项目融资方案的评价指标——项目融资效益。从政府角度出发,建立特许经营项目BOT和BOO两种模式的融资效益模型和计算步骤,以煤矿项目为例进行验算,结论表明BOT模式更适合此类项目。两种模式融资效益存在差异的原因在于分析立场和计算时间。论文研究的融资效益模型为各种特许经营项目融资方案综合评价提供重要指标和方法。研究结论可用于此类项目融资模式的选择、设计与优化。     

在新的起点上蓄势再出发——纪念中国科学院和德国马普学会科学合作四十周年

<正>关心中德科技合作的人们应该还记得2004年5月在北京举行的那场隆重热烈的庆祝活动,中科院和德国马普学会合作的创建者、推动者、亲历者、参与者30年来首次欢聚北京,畅叙友谊,共道未来。两国领导人还特发贺辞,称赞两机构的合作为国际科技合作的典范。春华秋实结硕果,物转星移又10年。在不断发展和探索中,中科院和马普学会迎     

以国际化理念深化科技和教育改革

中国革命的伟大胜利和改革开放的巨大成就都表明,国际化与本土化有机结合的重要性和必要性。开放性是实现国际化的前提,国际化是建设世界一流的基础。国际化就是把国际性融入到本土,把本土性拓展成国际,两者互为转化、相辅相成、相得益彰、形成一体。国际化已成为全球化发展不可逆转的趋势,以国际化理念全面深化科技和教育改革,率先推进中国特色国际化发展既是时代的要求,也是历史的必然。中国特色国际化就是要把国际化的过程和内涵及其目标与中国改革开放的实践相结合,充分发挥中国特色社会主义制度的优越性。科技和教育国际化不仅是我国在新的历史时期实现跨越发展的重要途径,也是实现教育梦、科技梦、中国梦的重要基础。中科院具有科研机构、学部、教育机构"三位一体"的独特优势,在科技和教育方面率先推进中国特色国际化发展将是实现习近平总书记在考察中科院时提出的"四个率先"的基础和前提。