体内微机电多维无线能量传输系统的仿真分析

介绍了无线能量传输系统的工作原理及其在实际应用上的不足,建立了多维松耦合能量传送器仿真模型,分析了接收线圈位置和姿态夹角对系统耦合系数的影响。仿真结果表明:三维接收线圈在不同姿态下均可以得到较好的互补效果,防止传输效率过低。还根据微机电系统对电压的要求,建立了整流、稳压电路模型,电路分析结果表明:该电路输出功率约180mV,电压平稳,完全可满足微机电系统对电源的要求。     

目的论何以与判断力相关联？

目的论之所以与判断力相关联，源于目的概念的现实指向。当康德通过“人是目的”将目的概念与理性相关联时，目的概念在由理性而来的对自身的生成中，彰显出其落实于现实生活的要求，而反思性的判断力恰恰提供出目的落实于现实生活的可能途径。由此带来了目的论的峰回路转--目的成为合目的性。作为一个伴随于判断过程之中的依据，合目的性不只是提供出情感能力之可能，它同时也在这一把握与感受中获得自身的现实化。通过这一现实性，合目的性在自然与自由的结合中，一方面使目的落实于自然，不可知的物自体显示出自身的意义；一方面使目的实现于文化之中。由此，上帝的存在不再只是一个理论的证明，它还落实到现实生活之中。     

Effect of power ultrasound on microstructural characteristics and mechanical properties of Al81.3Sn12.3Cu6.4 monotectic alloy

The liquid phase separation process and solidification process of ternary Al_(81.3)Sn_(12.3)Cu_(6.4) monotectic alloy was accomplished with a 20 kHz ultrasonic field in the power range up to 500 W.As ultrasound power rised,the coarse primary(Al) dendrites turned into fine equiaxed grains,whose size decreased by one order of magnitude as that during static solidification.Meanwhile,rather than pronounced segregation of large secondary(Sn) blocks in the alloy sample solidified under static condition,tiny secondary(Sn) droplets dispersed homogenously within the(Al)matrix in the presence of ultrasound.Under the highest ultrasound power of 500 W,the spherical ternary(Al + Sn + θ(Al_2Cu)) monotectic cells formed.The refinement of primary(Al) dendrites and uniform distribution of secondary(Sn) droplets induced by power ultrasound result in the improvement of microhardness,wear resistance,compressive and yield strength of ternary Al_(81.3)Sn_(12.3)Cu_(6.4) monotectic alloy.     

Deflationary representation,inference, and practice

This paper defends the deflationary character of two recent views regarding scientific representation, namely RIG Hughes' DDI model and the inferential conception. It is first argued that these views' deflationism is akin to the homonymous position in discussions regarding the nature of truth. There, we are invited to consider the platitudes that the predicate “true” obeys at the level of practice, disregarding any deeper, or more substantive, account of its nature. More generally, for any concept X, a deflationary approach is then defined in opposition to a substantive approach, where a substantive approach to X is an analysis of X in terms of some property P, or relation R, accounting for and explaining the standard use of X. It then becomes possible to characterize a deflationary view of scientific representation in three distinct senses, namely: a “no-theory” view, a “minimalist” view, and a “use-based” view—in line with three standard deflationary responses in the philosophical literature on truth. It is then argued that both the DDI model and the inferential conception may be suitably understood in any of these three different senses. The application of these deflationary ‘hermeneutics’ moreover yields significant improvements on the DDI model, which bring it closer to the inferential conception. It is finally argued that what these approaches have in common—the key to any deflationary account of scientific representation—is the denial that scientific representation may be ultimately reduced to any substantive explanatory property of sources, or targets, or their relations.     

太阳能热气流技术研究进展

太阳能热气流技术是近几十年来发展迅速的太阳能热利用技术,它拥有环境友好、技术成本低、应用领域广、适合大规模发电利用等特点。这些年国内外学者对太阳能热气流技术的发展和太阳能烟囱的应用做出了大量杰出的研究工作。总结了近期尤其是近一两年太阳能热气流技术在发电以及暖通领域的最新成果,为我国太能热气流技术的进一步发展提供依据。     

500kV静安（世博）输变电工程地下变电站基础施工监测部署

550kV静安（世博）输变电工程是上海2010年世博会重要配套工程,规模大、开挖深度深、基础施工工艺复杂,加强监测是确保施工安全和工程质量的关键环节。结合工程所在地区的地质条件和工程设计施工方案,阐述了该工程周边环境监测、基坑围护结构与支撑体系变形监测、建筑结构变形监测等监测部署工作,为信息化施工提供了重要的保障。     

基于光纤传感技术的电接点温度在线测量系统的研制

提出一种用于电力系统电接点的温度在线测量系统.该系统主要由宽带光源、光纤温度传感器、光纤滤波器、信号处理与放大电路和显示电路组成.利用螺旋液晶螺距对温度变化敏感的特性,将螺旋液晶填充到光子晶体光纤形成光纤温度传感器,温度变化引起最大反射光强点波长的变化,利用液晶螺距与温度之间的关系,实现接点温度的实时测量.本测量系统具有高电绝缘和抗电磁干扰等优点,特别适合于电力系统中电接点的温度在线检测.     

蟠龙抽水蓄能电站硐室围岩三轴试验及本构模型

利用岩石全自动伺服试验仪对重庆蟠龙抽水蓄能电站硐室围岩的砂岩试样开展了不同围压下的常规三轴压缩试验,进而构建了包含统一硬化/软化函数的弹塑性本构模型并进行了验证。试验结果表明,随着围压的增大,由原生缺陷闭合引起的初始非线性变形阶段逐渐减小,试样破坏时的峰值强度随围压增大而增大,由单轴压缩时的84.8MPa增大到围压10MPa时的168.5MPa;峰值强度和围压之间呈现较好的线性关系,黏聚力和内摩擦角分别为15.2MPa和52°。数值模拟与试验数据的比较表明,提出的弹塑性本构模型能够描述砂岩的主要力学现象,验证了该模型的可靠性。     

试析软权力及其实现途径

在国际政治中，国家的硬权力是国家权力的现实基础，但一个国家最有效的根本性权力并不必然来自于国家的硬权力，精神的或心理的联系才是政治权力的本质所在。在当今世界，单面的权力是有缺陷的的权力，重视软权力已经不仅仅是理论问题的探讨，而是各国在实现国家利益中应当普遍重视的问题。