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1.
本文讨论了互换性定律的族系,研究了非训练行为不准确现象,讨论了行为互换性的需求,推论了行为互换性定律的存在,建立了行为互换性的概念,创建了行为互换性定律的命题及其数学模型,详述了定律的内涵,分析了行为互换性与其他互换性的关系,讨论了行为互换性定律的对象范围、互换类型、自身特点和作用意义,对行为互换性定律进行了验证分析,讨论了行为互换性定律的应用,并给出了应用例子。  相似文献   

2.
简述了模拟水波的原理,使用面向对象方法对水波3D实时模拟系统进行了结构设计,给出了设计模式的结构图,提出了一个可复用的系统框架.详细介绍了使用HLSL对Gerstner水波进行编程的方法,实现了水波实时渲染的模拟并给出了关键的程序代码.最后分析了使用Gerstner波进行水波模拟存在的不足并提出了改进建议.  相似文献   

3.
《互联网时代》是以全球背景下的视野,聚焦了历史、聚焦了文化、聚焦了社会功能,通过十集的影像表达,缔造了一个时代所呈现的互联网巨大变革,满足了受众,创造了经济效益,开创了中国纪录片史上的又一个里程碑,同时创造了较高的社会现实意义。完成了近乎完美的中国映像,为中国纪录片占有国际地位奠定了社会基础。  相似文献   

4.
王强 《硅谷》2014,(8):115+103-115,103
随着社会的发展,科学技术的进步,计算机技术在各个领域中得到了广泛的应用。计算机技术在会计领域中发挥了重要作用,逐步建立起了会计电算化体系,充分发挥了计算机自动、高效、准确的优势,受到了会计人员的青睐,计算技术在会计领域中的应用提高了会计核算的准确性,提高了会计人员的工作效率,保障了会计工作快速、高效、高质量的完成。文章对会计中计算机技术的应用进行了探讨。  相似文献   

5.
介绍了一种以VBA作为研发平台的千分尺证书记录系统。介绍了系统的结构,并详述了几个关键模块的设计和系统的防错功能,千分尺证书记录系统的研发,减轻了工作量,降低了劳动强度,杜绝了人为产生的偶然性失误,提高了劳动效率。  相似文献   

6.
健康有益的社团活动不仅丰富了校园文化,培养了学生的兴趣爱好,扩大了学生的求知领域,使大学生活丰富多彩,而且对大学生的心理成长具有积极的作用。即社团活动使大学生获得了归属感,丰富了情感体验,提高了交往能力,增强了合作意识,提升了自信心,促进了大学生社会化的进程。  相似文献   

7.
本文论述了研究标准化性质的意义,阐述了4个性质的内涵,分别研究了其理论关系和特点,提出了4个性质的证明方法,并作了相应证明,论述了4个性质的应用关系,给出了部分代表性的应用领域。  相似文献   

8.
本文简述了小壳体零件的特点,提出了以往生产中产品由于壁薄而废品率高的问题,由于零件设计和铸件毛料入手作以具体分析,改进了工艺方法,增加了加工余量,更改了毛料,实践证明,改进后的工艺方法,大幅度降低了加工中的废品率,提高了劳动生产率,满足了该零件的设计要求,为公司节省了大量生产成本。  相似文献   

9.
对盒体零件的冲孔工艺方案进行了分析,介绍了各种冲孔工艺方案的优缺点,从而确定了利用凸轮机构,实现了该零件的径向冲孔。介绍了该模具结构及工作过程,给出了零件的工艺计算方法,提出了模具的设计方法,为解决同类零件的冲孔提供了参考。  相似文献   

10.
对电子倍增CCD(EMCCD)相机制冷的必要性以及热电制冷器(TEC)的特点进行了说明,阐述了真空绝热的优势,分析了真空绝热失效条件,提出了真空绝热的难点及真空保持方案,分析了相机芯片发挥其性能所需的制冷温度,对制冷相机漏热途径进行了分析,计算了克服漏热所需的制冷功率,并设计了制冷绝热方案,对相机进行了稳态热分析建模,将多级热电制冷器进行了参数化转化并将其带入模型边界中,经过迭代拟合得到了相机杜瓦及芯片温度分布,分析了绝热制冷方案的可行性。  相似文献   

11.
基于结构振动参数变化的损伤探测方法综述   总被引:14,自引:10,他引:14  
综述了基于结构振动参数变化的损伤探测的方法,对现有的文献中的方法进行了分类和评述,重点介绍了当前急需的对复杂结构进行损伤探测的较为有效的方法,并对该领域在理论和实际应用中尚存在的问题进行了讨论,根据国内外最新的文献对这一领域未来的发展方向和趋势进行了展望。  相似文献   

12.
High performance, low cost, selective surfaces which are chemically and thermally stable are a key limiting problem in the development of the thermal applications of solar energy. This review deals with selective coatings that withstand high temperatures. After indicating the comparative advantages of selective over black-body absorbers, the different ways of generating selectivity are briefly investigated. The physicochemical requirements that must be met, in addition to the specific optical properties that are needed, are established, and criteria for the choice of materials are given. Finally several examples of selective surfaces are described and some trends for further research in the field are discussed.  相似文献   

13.
S Maniv 《Vacuum》1983,33(4):215-219
The factors causing problems in sputter deposition of thin films are analysed and possible design solutions are offered. ZnO sputtered films are used as a probe for studying problems. The physical parameters of the discharge that have influence on the sputtering processes are described and related to the sputtering parameters. A comparison of discharges used in Diode, Magnetron, and Triode arrangements with respect to their system performances results in the conclusion that Magnetrons are superior to Diodes and that Triodes are better than Magnetrons, in spite of the fact that Triodes' discharges are of the supported kind and their deposited layers are difficult to reproduce.  相似文献   

14.
Y. Z. Chen  X. Y. Lin 《Acta Mechanica》2006,182(3-4):211-229
Summary In this paper, a simple layer potential and a double layer potential are suggested to solve the curved crack problem. The complex potentials in the simple layer case are formulated on the distributed dislocation along the curve. Meantime, the complex potentials in the double layer case are formulated on the crack displacement opening distribution. Behaviors of the complex potentials, for example the behaviors of increments of some physical quantities around a large circle, are analyzed in detail. Continuity and discontinuity of some physical quantities in the normal direction of the curve are analyzed, which are key points for formulating the integral equations of the problems. One weaker singular, two singular and one hypersingular integral equations are suggested to solve the problems. The relations between the kernels in different integral equations are addressed. Similarly, a simple layer potential and a double layer potential are suggested to solve the curved rigid line problem. The complex potentials in the simple layer case are formulated on the distributed forces along the curve. Meantime, the complex potentials in the double layer case are formulated on the resultant force function. One weaker singular, two singular and one hypersingular integral equations are suggested to solve the problems. When the resultant forces and moment are applied on the deformable line, the constraint equations are suggested. For more general cases, for example, in the case that the tractions applied on the two crack faces are not same in magnitude and opposite in direction, a singular integral equation is suggested. The equation is obtained by a superposition of two kinds of single layer potentials.  相似文献   

15.
谈家居装潢的设计   总被引:1,自引:1,他引:0  
李继春 《包装工程》2004,25(3):140-141
居室装潢是住宅设计的深入和继续,是居室环境的再创造.居室设计的风格是在不同的时代思潮和地域特征下,通过独创的构思和表现,逐步演变成的居室设计形式.  相似文献   

16.
The class of exponential smoothing models which vary the values of their parameters to adapt to changing conditions in a time series are referred to as adaptive forecasting techniques. In this article criteria for evaluating forecasting models are presented and the features of a simple exponential smoothing model that are exploited by the adaptive techniques are discussed. Several adaptive forecasting schemes are described and classified, and examples of the performance of these techniques are presented.  相似文献   

17.
Two-sided Ostrowski matrix iteration is applied to solve eigenproblems of non-conservative continuous systems in structural dynamics starting from known eigensolutions of a related conservative system. Eigensolution paths are followed as the parameters of the system governing its non-conservative behaviour are increased from zero. No discretization is performed and no truncation errors are introduced. The real eigenvalues of the related conservative problem are calculated by use of the Wittrick–Williams algorithm. The corresponding eigenvectors are obtained with an inverse iteration method using eigenfrequency-dependent trial eigenvectors. Residues of system harmonic transfer functions are computed using the eigenvalues and eigenvectors together with eigenvector normalization constants (modal Foss dampings). These residues are needed in a transient analysis. The method is applied to the generalized Beck column stability problem. Critical loads are calculated. Harmonic flexibilities of subcritically loaded columns in transverse vibration are studied. Applications to control problems are foreseen.  相似文献   

18.
金属基复合材料的高应变速率超塑性   总被引:1,自引:0,他引:1  
综述并评论了金属基复合材料的高应变速率超塑变形机制,描述了金属基复合材料在高应变速率超塑变形中的一些理化现象,说明了变形过程中的各种影响因素,总结了具有高应变速率超塑性能的金属基复合材料及其性能,并指出了在金属基复合材料的高应变速率超塑性研究方面的不足。  相似文献   

19.
纳米SiC颗粒增强铝基复合材料制备工艺进展   总被引:1,自引:0,他引:1  
余志勇  郝斌  崔华  周香林  张济山 《材料导报》2006,20(Z2):206-208,218
介绍了纳米SiC颗粒增强铝基复合材料的发展现状,重点介绍和评述了国内外几种制备工艺的研究现状和应用,分析了纳米SiC颗粒增强铝基复合材料的微观结构,指出了纳米SiC颗粒增强铝基复合材料研究中存在的几个重要问题,展望了其未来的发展趋势.  相似文献   

20.
蒸发式冷凝器发展和应用   总被引:26,自引:0,他引:26  
蒋翔  朱冬生 《制冷》2002,21(4):29-33
本文介绍了冷凝器型式特点及应用现状,比较了不同型式的冷凝器,着重阐述了蒸发式冷凝器的结构、原理及其优点,分析了蒸发式冷凝器的发展及应用现状,总结了蒸发式冷凝器使用中存在的问题并提出了解决问题的方法,展望了蒸发式冷凝器的发展方向和应用前景。  相似文献   

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