PVA-PC-KOH-H2O碱性固体聚合物电解质的制备和表征

以PVA-KOH-H2O体系碱性固体聚合物电解质为基质,添加适量碳酸丙烯酯(PC)做增塑剂来提高性能。利用X-射线衍射分析、红外光谱技术分析、交流阻抗谱和循环伏安法等对样品进行了表征。研究结果表明,聚合物电解质以无定形态为主,含极少量晶相,PC的适量添加可以降低电解质膜的结晶度增大无定形区域,从而提高室温离子电导率,当PVA:PC=3:1(质量比)复合电解质膜的室温电导率最高可达4.41×10-2S/cm,同时电化学稳定窗口也满足使用要求(相对于不锈钢电极,其电压稳定窗口为3.5V)。     

浅谈ABB焊接机器人软件程序

一、系统软件程序应用 1．机器人热启动。当机器人出现软件冲突，如正常运行中突然间不执行程序．而且无故障信息。具体步骤如下：示教器多功能窗口——选择SERVCE窗口-FILE—RESTART（整个过程大于1分钟）     

如何以安全模式启动Windows

在Windows XP中运行“rundll32 netplwiz dll．UsersRunDll”（注意大小写）或者“control uaserpasswords2”能够打开一个名为“月户帐户”的窗口（如图1所示）．这里提供了一个简易的帐户管理界面，不但可以添加、删除帐户．它还提供了非常有用的独特功能：选中登录帐户．     

用无机聚合物制作膜

美国科学家已成功地研究出一种非常稳定的磷—氮—聚合物,叫做Polyphosphazene。这种物质适用于不同分离过程的膜材料。这种膜具有抗高温、抗不稳定的pH值、抗腐蚀性溶质的特性,并能抗放射性辐射。     

多联机浅谈

多联机构造原理：多联机系统属于制冷剂系统（制冷剂分为R22和R410A两种）是由一台室外机组联结多台室内机组。每组外机可配置不同规格、不同形式、不同容量的室内机1—60台（以sanyo 6eco-Iseries系统为例）由于采用电子膨胀阀和变频压缩机，可使室内机组的负荷变动通过制冷剂连续调节而达到稳定的室温，同时能使每一个系统的室内机总容景配比一般可以达到150％-130％。     

我国建筑业高质量发展对策研究——基于政策工具视角

文章从政策工具视角研究我国工程总承包（EPC）、实施绿色建筑（GB）、装配式建筑（PC）和建筑信息化（BIM）四方面的政策,并利用政策文本内容分析法,对我国各地区在2005—2020年颁布的政策文件,从政策工具、政策驱动主体、政策效力层级3个维度构建分析框架。研究发现：（1)目前我国的政策工具以信息型为主,管制型和激励型为辅;（2)政策的驱动主体以省厅级为主,尚缺乏地市级的政策驱动主体;（3)在建筑业高质量的具体发展方向上,绿色建筑和装配式建筑方面的政策效力相对合理,而建筑信息化和工程总承包方面尚需出台更具实践指导意义的专项政策。在此基础上针对性地提出协调建筑业高质量发展的政策建议,为我国新时代建筑业高质量发展提供一定参考和借鉴。     

机会窗口、复合式战略与后发企业追赶——基于大华股份的纵向案例研究

基于中国本土化理论——复合基础观,以浙江大华技术股份有限公司（以下简称大华）为例,结合后发企业追赶需要考虑的重要情境即机会窗口,分析后发企业在追赶过程中,如何合理、灵活地采取复合式战略回应机会窗口,并利用机会窗口带来的发展机遇,实现从初始追赶到超越追赶再到行业前沿的追赶历程。研究发现,同一行业内不同机会窗口之间环环相扣、相互影响,某一机会窗口的出现也会触发其它机会窗口出现,进而引致整个行业机会窗口涌现;基于复合基础观视角,后发企业追赶路径的演变过程为：最初以技术模仿式创新为导向实现边缘赶超,继而以市场把握和扩张为导向实现商业模式创新,然后以全面协同创新为导向实现系统竞争力提升;后发企业通过实施复合式战略回应机会窗口的开启,能够帮助其更好地把握住发展机遇,实现追赶;与追赶路径演变相关联,随着企业内部资源与能力的积累,战略回应机制也相应地呈现为“被动回应—主动回应—引领拓展”的演变过程。     

浅析钢筋在建筑成品中的腐蚀

由于水泥水化作用形成大量氢氧化钙，使混凝土孔隙中的水分为具有高碱性（PH=12．14）的电解质。埋在混凝土内的钢筋，在碱性介质中表面将形成一层薄的钝化膜。尽管空气中的氧可以通过混凝土中孔隙渗入到钢筋表面，但是钝化膜可以有效地抑制钢筋的腐蚀。只有当钢筋表面的钝化膜遭到破坏时，钢筋才会开始发生腐蚀。有两种情况会使钝化膜遭受破坏：一种是外围混凝土的碳化；另一种是氯化物的渗入。     

机会窗口、复合式战略与后发企业追赶——基于大华股份的纵向案例研究

基于中国本土化理论——复合基础观，以浙江大华技术股份有限公司（以下简称大华）为例，结合后发企业追赶需要考虑的重要情境即机会窗口，分析后发企业在追赶过程中，如何合理、灵活地采取复合式战略回应机会窗口，并利用机会窗口带来的发展机遇，实现从初始追赶到超越追赶再到行业前沿的追赶历程。研究发现，同一行业内不同机会窗口之间环环相扣、相互影响，某一机会窗口的出现也会触发其它机会窗口出现，进而引致整个行业机会窗口涌现；基于复合基础观视角，后发企业追赶路径的演变过程为：最初以技术模仿式创新为导向实现边缘赶超，继而以市场把握和扩张为导向实现商业模式创新，然后以全面协同创新为导向实现系统竞争力提升；后发企业通过实施复合式战略回应机会窗口的开启，能够帮助其更好地把握住发展机遇，实现追赶；与追赶路径演变相关联，随着企业内部资源与能力的积累，战略回应机制也相应地呈现为“被动回应—主动回应—引领拓展”的演变过程。     

长江经济带工业绿色全要素水资源效率的区域差异与随机收敛

在全要素生产率框架下,基于非期望产出的SBM模型测算了2004—2019年长江经济带工业绿色全要素水资源效率的时序变化特点,在此基础上通过Dagum基尼系数分解分析其区域差异及来源,并通过空间杜宾模型分析其空间收敛效应。研究表明：（1）长江经济带工业绿色全要素水资源利用效率逐年提高,但流域内仍存在巨大差异;（2）水资源效率的总体差异呈缩小趋势,区域间差异是区域差异的主要来源;（3）水资源效率存在较为稳定的空间相关性,基本形成了以上海、浙江为中心的“高质量增长极”以及以上游地区为中心的“低水平发展陷阱”;（4）长江经济带以及上游、中游、下游的工业绿色全要素水资源效率均存在β收敛。基于以上结论,本文提出从四个方面提出建议,为提升长江经济带工业绿色全要素水资源效率提供参考。     

John Stuart Mill's Theory Of Justice

John Stuart Mill has traditionally been portrayed as self-contradictory and failing to construct a unified social theory. Recent scholarship, however, has challenged this view, finding Mill's work to be creatively synthetic in bridging the antinomies inherent in liberal democratic thought. This revisionist interpretation of Mill is advanced by an understanding of his theory of justice and its role in shaping his policy positions on issues such as welfare, education, voting rights, property rights, taxation, government intervention, and the future of capitalism.     

A Rich Vein for “Reality Mining”北大核心CSSCISSCI

Arik Hesseldahl In the aftermath of the September 11 attacks, U.S. officials quickly turned their attention to other potential targets, including California's Golden Gate Bridge. What would happen if terrorists took down the bridge between San Francisco and Marin County? How much of the region would be affected and for how long?     

John Stuart Mill's Theories of Wealth and Income Distribution

Although he was much influenced by David Ricardo when he wrote the classical part of his Principles , John Stuart Mill was not a Ricardian when he penned his theories of wealth and distribution. They are based on a triple foundation. First, a belief that economics is a moral discipline. Second a theory of custom-driven human behavior. Third, an empirically formed conviction that the institutions of state, education and business cooperate to structure the distribution of income. On the basis of these presuppositions, Mill formulated 1) an institutional theory of the formation of human and non-human wealth and 2) an even more institutional theory of distribution demonstrating how the aforementioned institutions malignantly skew the distribution of income to the advantage of the propertied classes and to the extreme disadvantage of the working class. As a social economist, Mill recommended institutional reforms designed to eradicate the poverty of the working class.     

中国养活自己能力的长期预测:技术和政策分析

中国拥有世界五分之一强的人口 ,收入又在迅速增长。因此 ,国际上很自然地会考虑或推测她在今后的几十年是否有能力养活自己。中国的人口预计将从 2 0 0 0年的 1 2 8亿增长到 2 0 2 0年的 1 4 6亿 ,和 2 0 3 0年的 1 4 9亿。与此同时 ,人均收入的增长将导致对家畜和鱼类产品更大的需求 ,因而对饲料的需求也将有很大的增长     

Toward a Phylogenetic Reconstruction of Organizational Life

Synopsis Classification is an important activity that facilitates theory development in many academic disciplines. Scholars in fields such as organizational science, management science and economics and have long recognized that classification offers an approach for ordering and understanding the diversity of organizational taxa (groups of one or more similar organizational entities). However, even the most prominent organizational classifications have limited utility, as they tend to be shaped by a specific research bias, inadequate units of analysis and a standard neoclassical economic view that does not naturally accommodate the disequilibrium dynamics of modern competition. The result is a relatively large number of individual and unconnected organizational classifications, which tend to ignore the processes of change responsible for organizational diversity. Collectively they fail to provide any sort of universal system for ordering, compiling and presenting knowledge on organizational diversity. This paper has two purposes. First, it reviews the general status of the major theoretical approaches to biological and organizational classification and compares the methods and resulting classifications derived from each approach. Definitions of key terms and a discussion on the three principal schools of biological classification (evolutionary systematics, phenetics and cladistics) are included in this review. Second, this paper aims to encourage critical thinking and debate about the use of the cladistic classification approach for inferring and representing the historical relationships underpinning organizational diversity. This involves examining the feasibility of applying the logic of common ancestry to populations of organizations. Consequently, this paper is exploratory and preparatory in style, with illustrations and assertions concerning the study and classification of organizational diversity.     

Information infrastructure: Who builds broadband networks?

This paper examines the essential difference between the U.S. and Japan, when one considers information infrastructure. There are seven perception gaps between the U.S. and Japan concerning Information Infrastructure policies. These gaps must be understood in order to compare the countries' governmental policies in this area. In looking at the present circumstances, the essential question to answer concerns who is to build, own and operate the network(s) of the infrastructure. Liberalization is certain to be a central factor in the ongoing telecommunications debates. Now that customers have had a taste of the liberalized market-place, the movement toward more open markets will be difficult to stop. When considering options, it is necessary to pay close attention to standardized network access and the increasingly important role software plays. These issues are causing us to take a new approach to the traditional role played by regulators. They also force a closer look at the appropriate structure of utility companies. This paper addresses the above issues in hopes of stimulating dialog on the new telecommunications infrastructure paradigm.     

Nonlinearity in Stock Exchange Markets: The Case of Bist 100 Indices

In this paper,using data for the Bist 100 index,we investigate the presence of nonlinearities by employing several nonlinearity tests.The Brock,Dechert,and Sche...     

Solidified Branding Function: How the Urban Brand Affects a Small Town’s Development? Case Study of Wangqingtuo,Tianjin, China

Chinese small towns are usually developed with single core industry,and the urban brand is the identity of a town that formed with the development of its indust...     

海岛地区产业演替及资源基础分析--以舟山群岛为例

改革开放以来,舟山市产业构成发生了显著变化,其经济发展过程可以划分为三个阶段。1992年前,是以产业结构渔业占绝对地位的单一结构阶段;1993—1998年,以旅游业为主的第三产业快速发展阶段;上世纪末以来,又进入了新一轮的经济发展时期,即工业产值比重快速增加阶段。根据海岛的自然资源基础和特点,在新世纪的经济发展过程中,舟山市应定位为生态型的港口旅游城市。以港口及临港工业为主导,以海岛旅游和海洋经济为特色,大力发展第二产业和第三产业。海岛地区的主导产业应体现海岛资源优势及区位优势,以集群性环保型产业为主。同时由于海岛地区淡水资源缺乏,主导产业也应着重选择低耗水型产业。