基于PRO/E的混流式水轮机叶片的三维造型

针对混流式水轮机叶片形状的复杂性给其三维实体造型带来的困难,以混流式转轮叶片二维木模图为基础,基于PRO/E软件的三维建模功能,采用从点到线、线到面、面再到体的方法,对混流式水轮机叶片进行三维造型.为了提高造型的准确性,用切割的方法对叶片进水边、上冠及下环进行修型,从而可真实准确地得到木模图所表示的混流式水轮机叶片的三维实体造型.     

叙事文体学的视角转换下的小说翻译研究——以海明威的《麦康伯短暂的幸福生活》的中译本为例

作为语言学模式的一种,叙事学和文体学作为西方翻译理论的一种新趋势,主要着眼于叙事文体学的视角转换在翻译中的问题的研究和解决。结合叙事文体学中的叙事视角,分析海明威《麦康伯短暂的幸福生活》的中译本,正确把握视角转换对等,实现翻译等值。     

甲米一级混流式水轮机顶盖强度及刚度计算研究

以甲米一级混流式水轮机顶盖为研究对象,应用ANSYS有限元分析软件,建立了顶盖的结构三维模型。根据水轮机的结构参数,对其结构进行受力分析与计算;施加受力后,分析了顶盖的应力与应变。计算表明其结构设计是可靠的,能充分保证整个水轮机的可靠性和寿命。     

弗兰西斯·培根"知识就是力量"新解

本文引用弗兰西斯·培根对“知识就是力量”的论证 ,阐明知识作为一种力量 ,不仅推动了近代　　欧洲社会的发展繁荣 ,在当代 ,随着社会的发展也有了新的内涵。文章指出 ,在知识经济时代 ,知识与人才是　　最重要的资源 ,只有尊重知识、尊重人才、改革教育 ,才能加快知识向科学技术、向生产力的转化 ,知识才能　　显示出巨大的力量。     

Kepler’s theory of the soul: a study on epistemology

Kepler is mainly known among historians of science for his astronomical theories and his approaches to problems having to do with philosophy of science and ontology. This paper attempts to contribute to Kepler studies by providing a discussion of a topic not frequently considered, namely Kepler’s theory of the soul, a general theory of knowledge whose central problem is what makes knowledge possible, rather than what makes knowledge true, as happens in the case of Descartes’s and Bacon’s epistemologies. Kepler’s theory consists of four issues: the theory of the different sorts of soul—that is, the human soul, the animal soul, the vegetable soul, and the Earth soul—concerning their faculties, the differences and the resemblances emerging among them, the relation they maintain with their own bodies and the world, and the distinction soul–world. The paper discusses these issues from a historical perspective, that is, it reconstructs the way they appear in three periods of Kepler’s career: the period prior to the publication of the Mysterium cosmographicum, the period from 1596 to 1611, and the period of the Harmonices mundi libri V. Finally, Kepler’s epistemology is briefly contrasted with Descartes’s and Bacon’s in order to suggest that Kepler’s could be seen as a third way to understand the philosophical origins of Modernity.     

用二项式分布研究伽尔顿板实验的分布曲线

从随机理论中的二项式分布出发，定量分析了伽尔顿板实验，给出了分布函数。     

Three-Dimensional Simulation of Unsteady Flow in a Model Francis Hydraulic Turbine

For Francis hydraulic turbines, unsteady flow caused by vortex ropes in the draft tube leads to a problem of stability in operation. The unsteady flow field ef a model Francis hydraulic turbine was simulated under part-load operation. A sliding mesh model was used to calculate a time-accurate solution for the strong rotor-stator interactions between the runner and guide vanes, and the draft tube. Based on threedimensional incompressible Reynolds averaged Navier-Stokes equations and on a renormalization group k-ε turbulence model, spatial discretizatien was obtained by using the finite volume method with unstructured grid elements, and a second order fully implicit scheme was applied for time. Pressure fluctuations in the draft tube were recorded and analyzed via a fast Fourier transform calculation. The results were compared with the experimental data, and shew that the vertex rope in the draft tube and the induced pressure fluctuations are well simulated.     

Galton's Quincunx: Probabilistic causation in developmental behavior genetics

In what sense are associations between particular markers and complex behaviors made by genome-wide association studies (GWAS) and related techniques discoveries of, or entries into the study of, the causes of those behaviors? In this paper, we argue that when applied to individuals, the kinds of probabilistic ‘causes’ of complex traits that GWAS-style studies can point towards do not provide the kind of causal information that is useful for generating explanations; they do not, in other words, point towards useful explanations of why particular individuals have the traits that they do. We develop an analogy centered around Galton's “Quincunx” machine; while each pin might be associated with outcomes of a certain sort, in any particular trial, that pin might be entirely bypassed even if the ball eventually comes to rest in the box most strongly associated with that pin. Indeed, in any particular trial, the actual outcome of a ball hitting a pin might be the opposite of what is usually expected. While we might find particular pins associated with outcomes in the aggregate, these associations will not provide causally relevant information for understanding individual outcomes. In a similar way, the complexities of development likely render impossible any moves from population-level statistical associations between genetic markers and complex behaviors to an understanding of the causal processes by which individuals come to have the traits that they in fact have.     

从《弗朗西斯·麦康伯短促的幸福生活》解读海明威的自我形象与男权意识

《弗朗西斯·麦康伯短促的幸福生活》是海明威独具创作特色的非洲题材短篇小说，以这篇作品为例解读海明威自我形象与男权意识的映射。     

低比转速混流式水轮机转轮上冠型线的优化方法

通过混流式水轮机转轮上冠型线的优化,以提高水轮机效率为目的,基于ISIGHT软件集成GAMBIT和ANSYS FLUENT16.0软件,采用实验设计的最优拉丁超立方(optimal Latin hypercube, OLH)方法提出了80组设计方案.然后运用ANSYS FLUENT16.0软件对各方案进行数值计算,以设计工况下的水轮机效率为目标函数,进而用响应面方法(response surface method,RSM)得到近似模型.最后结合粒子群优化(PSO)算法进行自动优化设计,提出一种低比转速混流式水轮机转轮上冠型线的优化设计方法.该方法应用于模型混流式水轮机转轮上冠型线的优化设计,结果表明:优化后水轮机水力效率提高0.35%,从而为混流式水轮机转轮上冠型线的优化设计提供了合理有效的途径.