斗式提升机的安全防护装置

在斗式提升机上装设安全防护装置对设备正常的安全运行是必要的,本文重点介绍了泄爆、跑偏、过载、测速和逆转等几种常用安全防护装置的重要性、结构特点及工作原理。     

Markets under the Microscope: Making Scientific Discoveries Valuable through Choreographed Contestations

This paper breaks new ground by revealing and conceptualizing the marketization of science as a process that transforms scientific discoveries and markets through a series of choreographed contestations: moments of valuation that occur when different social worlds collide. We follow a scientific discovery, from the moment it entered an incubator, to uncover how valuation practices and market devices enact and contest diverse social values (i.e., what is worth doing) to generate economic value (i.e., what is worth paying for) at the science‐market‐entrepreneurship nexus. In contrast with commercialization of science studies that focus on institutional arrangements, this study explicates the practices and devices used by multiple market actors to transform a scientific discovery into a marketable object. In so doing, we characterise choreographed contestations and the mechanisms through which they operate to explain how specific valuations are performed to work out innovative next steps that unfold the marketization of science.     

广告英语的修辞魅力

现代广告的作用举足轻重,它可以使一个名不经传的品牌一夜间家喻户晓,也可以使老品牌重新焕发勃勃生机。广告语力求新颖别致,不落俗套,就少不了各种修辞手法,英文广告也不例外。     

一体化教学在检测与控制装置课程中的实施

结合课程的特点和各方面的教学经验,提出将一体化职业教学应用于检测与控制装置课程中,从传统的以课程理论教学为主导的阶段式教学模式转换为以综合职业能力培养为目标,以贴合实际岗位要求的工作任务为载体,根据实际岗位的工作任务和工作过程设计出理论与实践紧密结合的课程体系和内容,按照学生将来的工作岗位的流程顺序和高职学生学习的特点进行教学及实训的设计,实现理论教学与实践教学融通合一的一体化教学模式。     

电力系统并联补偿装置中的LC串联电路

在电力系统中,并联补偿装置可以补偿系统中的无功功率、降低网络损耗、提高功率因数和电压质量。并联电容器装置是电力系统中最常用的并联补偿装置,电容器和电抗器串联连接就构成了LC串联电路。电容器主要用于补偿系统中的感性无功,通常与系统负荷端并联连接;而为了降低电容器合闸投运过程中的涌流倍数,以及抑制电网电压波形畸变和控制流过电容器的谐波分量,还需给电容器配套选用串联电抗器。本文在讨论了LC串联电路之后,提出了与电容器配套使用的电抗器电抗率的选取方法。     

The 21st Century Cures Act: pharmacoeconomic boon or bane?

Barriers to entry in healthcare markets constitute one of the overriding concerns of health economists. The recent enactment of the 21st Century Cures Act in the United States reduces statutory entry barriers to the discovery, development, testing, and licensing of drugs and medical devices. Drug and device makers also see the burdensome and time-consuming requirements of the Food and Drug Administration?s approval process as key barriers to lowering the costs of their products, considering it takes a decade of research amounting to $1 billion just to bring a single drug to the market. Along with novel opportunities for medical product innovation and faster treatment of diseases, the expedited approval process carries with it contentious challenges involving the safety, efficacy and value of drugs and devices. The ensuing trade-offs and unintended consequences of such a regulatory game-changer bring to the fore one of the most enduring debates between medicine and economics: Whether – or to what extent – cost and efficiency factors affect clinical inquiry into possible solutions to human illnesses. The practical and theoretical contributions of pharmacoeconomics should enlighten contemporary and future issues and discussions surrounding the implementation of this landmark legislation. After all, despite its undeniably good intent and far-reaching significance, no law can ever be perfect.     

现代建筑电气的防雷击电磁脉冲设计

本文介绍了现代建筑电气的防雷击电磁脉冲设计的方法和措施,包括电磁屏蔽、接地、等电位联结以及电涌保护器（SPD）的设置和安装。     

中国电子及通讯设备产品的进出口增长效应— — — 中国加入 WT O前后的比较

运用CMS模型分析加入WTO前后中国电子及通讯设备产品的进出口增长源泉及其变动,结果表明：1998--2001年和2002-2006年两个阶段中国电子及通讯设备产品的进出口增长源泉主要在于竞争力因素和需求因素,但竞争力因素对进口增长的贡献率在下降,需求因素对出口增长的贡献率也在下降,相比之下,其对进口增长的贡献率却在上升。结构因素对于进出口增长的贡献都很微弱甚至是起遏制作用。进出口效应表明中国的电子及通讯设备制造业的扩张是一种建立在廉价劳动力基础上的粗放式扩张,其发展内涵并没有得到真正的提升。