关于机械设计轴系结构设计的相关探讨

本文主要介绍了轴系部件的主要特征，然后对轴系结构设计进行了详细阐述，提出设计步骤和提高轴强度的主要措施。     

对塑编挤出机性能参数的分析

本文主要介绍了塑编挤出机的主要组成，分析了螺杆挤出机主要工艺技术参数的确定，以及作为挤出机主要部分的螺杆的性能参数的分析。     

信息系统安全风险的评估步骤研究绿色设计在制造企业中的作用

本文探讨了信息系统安全评估的过程与主要实施步骤，给出了一个进行信息系统安全风险评估的主要框架。在这个框架中对需要注意的评估实施主要环节作出了说明和解释，并提供了主要方法。     

家庭——学校——社会的教育链接

此文主要阐述了家庭，学校，社会三者对孩子的教育的关系，它们之间相互联系相互影响，它们三者构筑了一个教育链接的主要通道。     

浅谈混凝土搅拌车搅拌叶片设计

混凝土搅拌车搅拌叶片是搅拌筒的主要结构，是完成搅拌功能的主要部分。本文主要概述了搅拌车搅拌叶片最优化设计理论和主要优化方法，并且概述了搅拌叶片优化设计的主要过程。     

浅论我国中小企业存在的问题及解决办法

在我国，中小企业是社会主义市场经济的主要参与者之一，其在国民经济中扮演着重要的角色，因此，对我国中小企业的相关情况进行探讨是十分必要的。本文首先介绍了我国中小企业的发展现状及其在经济社会发展中的主要地位，接着阐述了我国中小企业所面临的主要问题，最后根据其存在的主要问题，提出了相应的解决办法，以期我国中小企业能够走上可持续发展的道路。[关键谰]中小企业；现状；地位；问题；对策     

基于建筑工程浅谈造价信息管理

本文主要阐述了建筑工程造价的构主要内容及建筑工程造价信息管理的主要工作，并分析了相互的关系，为建筑企业成本研究提供参考。     

急倾斜煤层伪斜柔性掩护支架及采煤工艺

本文主要阐述了柔性掩护支架的几种主要结构，主要采煤工艺，提出了几种常见的柔性掩护支架故障处理方法。     

浅谈提高会计人员职业道德素质的主要途径

文章论述了会计人员职业道德的主要特点，分析了丧失职业道德的危害，并就如何提高会计人员职业道德素质进行了探讨，提出了加强会计人员职业道德素质的主要途径。     

浅议土建基础施工中的深基坑支护施工技术

本文主要讲述了土木工程中的深基坑支护施工技术，其内容主要包括工艺流程及施工操作要点，论证了质量，安全，效益对工程的重要性。     

Transverse beam instability in a 50 GeV×50 GeV muon-collider ring

The transverse beam instability due to a broad-band impedance in a 50 GeV×50 GeV muon-collider ring is numerically investigated. It is shown that the transverse beam size is increased by a factor of five when the impedance, Z_||/n, is 1.7 Ω. The transverse instability is shown to be cured by introducing tune spreads, such as BNS damping, chromaticity, amplitude-dependent tune shift, and beam–beam interaction. It is shown that any one of these tune spreads limits the growth of the beam size to less than 20%.     

Fracture of polycrystalline Fe−2.3%V−0.12%P alloy

Fracture experiments on a polycrystalline Fe-2.3mass%V-0.12mass%P alloy show that the fracture mode is directly related to the grain boundary segregation of phosphorus. Comparison of the experimental data with theoretical simulations showed that intergranular fracture spreads along those grain boundaries, which contain more than 17 at.% of segregated phosphorus.     

浅析科技期刊封面设计

结合科技期刊封面设计现状，对科技期刊封面要素进行了分析，论述了如何从设计要素入手提高科技期刊封面设计质量，以便信息的完美传播。     

Calculation of the parameters of the size spread of blades in packs optimal with respect to vibration stresses

Procedures are developed for calculating the size spread of turbomachine impellers which are most hazardous or most favorable from the viewpoint of the level of vibration stresses. The procedures are based on the proposed method of calculating forced vibrations of the blade rims with arbitrary spreads and with any packing schemes as well as on optimization methods. The initial-parameter and finite-element methods and superelement approach are used for calculating forced vibrations. The effect of blade-size spreads on vibration stresses was investigated in a wide range of exciting frequencies. Optimal sets of spread parameters were obtained for a number of types of excitation and designs of blade rims.Translated from Problemy Prochnosti, No. 9, pp. 16–25, September, 1995.     

拉伸状态下碳纤维复合材料T型接头的断裂行为

建立了碳纤维复合材料T型接头数值模型,模拟了其在拉伸载荷下的损伤产生、扩展及失效过程,并对碳纤维复合材料T型接头试件进行了静态拉伸试验。结果表明,接头的初始损伤载荷为9.8~12.0 kN,损伤发生后接头的载荷值发生突降（降低约27%~38%）,此时接头仍具有一定承载能力;试件完全脱胶载荷较初始损伤载荷略有降低（载荷范围为8.0~8.6 kN）。数值计算和试验结果吻合,结果均显示填料区是碳纤维复合材料T型接头最薄弱的部位,易发生破坏;填料区破坏后裂纹迅速向填料区周围的胶层扩展,导致胶层的剥离,这是导致碳纤维复合材料T型接头失效的最主要原因。     

Localization of Strain Rate at Mesoscale and Its Effect on the Measured Strain Rate Sensitivity During Superplastic Deformation

Microstructural observations on specimens deformed in regions I, II and III of superplasticity suggest that the dislocation activity is restricted to limited grains in region I but spreads to almost all grains in the region III. Analysis has been carried out to show that the transition from the localized plastic flow in region I to relatively homogeneous plastic flow in region III significantly contributes to the high strain rate sensitivity observed in region II.     

Al-TiO2体系SHS过程中反应特征的研究

采用DSC和激冷实验对Al-TiO2的SHS反应过程进行了详细的研究，结果表明，Al还原TiO2的过程为：液态Al在TiO2颗粒表面铺展并与Al反应，从而在TiO2颗粒周围形成中间产物层TiO2-x，此后还原过程不断通过氧在中间产物层TiO2-x中的扩散而进行。     

具有高界面压应力的高分子共混物Ⅱ.拉伸过程中形态演化与增强机理

研究了聚对苯二甲酸乙二醇酯(PET)/聚乙烯(PE)和聚碳酸酯(PC)/PE共混物在拉伸过程中形态的演化和增强机理.结果表明,高界面压应力是共混物在基体加工温度成型时,从成型温度冷却到室温过程中基体收缩比分散相大产生的;两种共混物在拉伸中有不同的形态演化过程:PC粒子原位形成了微纤,粒子与基体间没有明显的界面滑动,而PET粒子只产生较小的塑性变形,成为椭球状粒子,粒子与界面间存在滑动.PC对基体PE的增强效果比PET的更好,因为PC/PE共混物拉伸过程中形成了良好增强作用的原位微纤.在拉伸过程中,PET/PE试样的细颈在靠近非浇口端形成,并从此扩展开.部分拉伸后,PC/PE试样比PET/PE试样的弹性回复大,回复到平衡状态时间长,这是两种共混物分散相变形机理不同引起的.     

Similarity solution for boundary layer development of a swirling jet impinging on a normal plane

When a smooth swirling jet of water impinges vertically on a horizontal plane it spreads outwards forming a boundary layer on the plane. At large radial distance r, the flow is completely absorbed by the boundary layer and in this region a similarity solution is obtained.     

Equivalent Quantum Efficiency and the Information Content of Photographic Images

Noise-equivalent quantum efficiency and responsive quantum efficiency of a photographic emulsion are explained and a definition of its information storage capacity at a given mean density level is formulated on the basis of Shannon's information theory. The definition involves the conventional assumption that the intensity distributions to be recorded by the emulsion are random and of low contrast. Some conventional assumption about these distributions is unavoidable because the Shannon information content of a received message does not depend only on the message itself. Currently available data about photographic emulsions only permit their information storage capacity to be evaluated over a restricted range of spatial frequencies. For photographic systems one can define the analogous concept of the informational equivalent quantum efficiency (bits per unit object-contrast density per photon). This concept provides a figure of merit for photographic systems which takes account in a physically significant way of the interactions between optical and photographic spreads, film speed, and photographic granularity.