模具装配过程的动态模拟及其应用

运用动画模拟软件Solid Works Animator制作了模具装配过程的动画。对于结构比较复杂的模具，实现模其装配过程的动态模拟可以更好地展示模具的内部结构，有助于客户直观感受模具设计模型，从而进一步完善模具设计，而且可以将此动画过程录制成AVI格式动画文件，从而能够在任何基于Windows的媒体播放器中进行播放，同时还可以将此动画应用于多媒体教学当中。     

基于3DStudioMAX的液压元件动画制作及播放

本文介绍了利用３ＤＳｔｕｄｉｏＭＡＸ制作动画的一般过程，并以一换向阀为例，阐述了液压元件动画制作和播放的方法。     

摆动从动件凸轮机构基本尺寸确定的CAD动画方法

通过对摆动从动件凸轮机构压力角求解过程的分析，论述了按照许用压力角设计摆动从动件凸轮机构基本尺寸的CAD动画方法，进一步介绍了用该方法确定基本尺寸的CAD过程，它可以得到精确的结果。     

《金属学原理》多媒体课件中的动画制作

根据《金属学原理》的特点，提出了多媒体课件中的动画制作要求。分析了基于3DMax和Flash动画软件的多媒体课件的制作过程。     

基于VRML的虚拟模型的构建和交互

介绍了VRML建模的常规方法，比较了现行建模方法的特点，总结了基于语义的描述建模方法，详述了模型开发过程中的建模、转换、装饰、动画和交互等关键技术，最后通过实例展示了运动车床的虚拟模型。     

基于面部微表情的动画关键帧二次嵌套插值法

微表情是源于人的情感表情的真实体现，在动画制作的过程中无论是二维动画还是三维动画的人物表情都需要尽量模拟真实人物面部表情。微表情动画关键帧嵌套指在参考真实微表情数据的基础上，形成模拟的微表情图形，将图形的关键帧在已有的表情动画关键帧序列基础上进行二次嵌套插入，对面部表情进行精细化的动画模拟。基于人面部微表情库的数据来对关键帧数据进行图形创建和插入，实验结果比没有插入微表情关键帧的动画效果更加生动，动画制作模拟精度更高，更有带入感。此方法对于提高二维动画、三维动画和VR模拟人物面部动画效果都具有一定的实用价值。     

利用Flash模拟消失模铸造工艺过程

利用计算机对消失模铸造（如生产过程、设备、液态金属前沿及凝固过程等）进行模拟在消失模铸造的研究、教学及推广中是非常有意义的。本文主要进行了如下工作：以flash为载体用动画描述整个消失模铸造工艺过程;通过动画描述简易生产线的设备及工作场景。文章还介绍了利用flash对消失模铸造模拟的主要制作过程。     

凝固模拟后处理中的技术进展

介绍的数值鼠标技术对提高视觉对色彩的分辨精度提供了一个非常好的解决方案。通常用于模拟凝固过程的动画AVI，类似于电影电视，缺乏互动能力，只能在固定的视场、视角下观看固定的序列画面。介绍的实时动画与实时拖动技术使用户在观察模拟结果时，在动画行进的同时，可以随意旋转、缩放、进格、退格等。     

轧辊的虚拟设计

在建立轧辊曲面数学模型的基础上，研究了基于VRML的轧辊虚拟设计方法，并运用3DS MAX Script脚本语言实现了轧制过程的动画仿真，并给出了一个设计实例。     

压缩机排气管高频钎焊自动控制系统

研究了应用工业控制机对空调压缩机排气管的高频钎焊过程进行控制检测的问题。为实现高频感应装置加热工件和钎料的工艺，设计了一套专用控制程序，配备动画软件模拟钎焊过程，具有检测、控制、计数等多项功能，并成功地应用于钎焊过程。     

新型的治疗阿尔茨海默氏症药物(1-二甲基磷酰基-2,2,2-三氯)-乙基-1-醇烟酸醋对体外神经细胞的作用

目的: 观察本实验室合成的一种治疗阿尔茨海默氏症(AD)的药物(1-二甲基磷酰基-2, 2, 2 -三氯)-乙基^-1-醇烟酸醋(NMF),对体外培养的皮层神经细胞活性的影响以及对海人藻酸(KA)所致的神经损伤的保护作用。方法: 采用体外培养皮层神经元的方法,解剖分离 15 d胚胎小鼠皮层神经细胞, 接种于 96孔板,48 h 后加药并培养 72 h,以 MIT 法 观察 NMF 对小鼠皮层神经细胞活性的影响;同时将接种于 24 孔板的细胞预先给予 NMF,d 3 时加或不加KA处理后,以台盼蓝染色鉴别并计数死、活细胞,可得出细胞的存活率。结果: NMF 明显促进胎鼠皮层神经元活性,其中 NMF1、0. 1、10nmol·L^-1促进神经元活性增殖率分别高达 34.7%、37.4%、36. 7%, NMF 明显促进正常胎鼠皮层神经元存活卒,与对照组比较,10nmol·L^-1 NMF 对皮层神经元的存活率分别提高 39.3%、73.5%。 NMF能显著 对抗 KA 所致的神经元损伤,与 KA 损伤组相比, NMF0.1、10、10nmol·L^-1对损伤皮层神经元的保护率分别为 77.30%、80.10%、84.15%。结论: NMF 明 显促进胎鼠皮层神经元的洁性、提高正常皮层神经元,的存活卒,并能有效地保护KA所致的神经元损伤,提示 NMF 是一种很有潜力的治疗 AD 的药物。     

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial confi guration. The fi nal shape of the ferrite is closely related to the misfi t between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.     

Effect of Short-Time Aging on the Pitting Corrosion Behavior of a Novel Lean Duplex Stainless Steel 2002

The effect of short-time aging in the temperature range between 400 and 1000 °C on the pitting corrosion behavior and mechanical property of a novel lean duplex stainless steel(LDSS) 2002 was investigated through the potentiostatic critical pitting temperature(CPT) tests and the Charpy impact tests. Both the pitting corrosion resistance and the toughness of aged specimens degraded due to the precipitation of detrimental secondary phases and the most significant reduction of CPT and impact energy emerged at 650 °C concurrently. The CPT of LDSS 2002 specimen aged at 650 °C decreased by 28 °C, and the impact energy dropped from 69 to 29 J/cm~2 compared with the solution-annealed sample. Transmission electron microscopy characterization showed that the main precipitates in LDSS 2002 were Cr_2N and M_(23)C_6 along the ferrite–austenite grain boundaries.     

INTRODUCTION TO PATENTS

The invention provides a method of making a mold which can reduce SOx generation rate while preventing decrease in hardening rate in the case of using sulfuric acid for a hardener composition. The method has a mixture step in which fire-resistant particles, a hardener composition and a binder composition are mixed to obtain a composition for a mold. The hardener composition contains sulfuric acid. In the mixture step, sodium carbonate is added. A molar ratio of the sulfuric acid to the sodium carbonate is 0.5 or more and 4.0 or less.     

China Foundry Week 2014

China Foundry Week, hosted by the Foundry Institution of Chinese Mechanical Engineering Society （FICMES） each year, is a large academic event in China. It is one of the ten high-impact activities sponsored by the Chinese Mechanical Engineering Society.     

17th Conference of Hydrodynamic and Electromechanical Control Engineering Call for papers

正1.Contents In order to promote the academic exchanges and technical communication of the research in the field of fluid power transmission and control,fluid control engineering specialized committee of the Chinese Society of Theoretical and Applied Mechanics will hold the 17th Conference of Hydrodynamic and Electromechanical Control Engineering on July 27-29,2014 in Tibet,Lhasa city.     

Information for Contributors

正The Transactions of Nonferrous Metals Society of China,founded in 1991 and sponsored by The Nonferrous Metals Society of China,is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology,including mineral processing,extraction metallurgy,metallic materials and heat treatments,metal working,physical metallurgy,powder metallurgy,with the emphasis     

Preface

<正>We are pleased to present this Special Issue of Transactions of Nonferrous Metals Society of China containing selected papers from the First Asian Conference on Aluminum Alloys(ACAA-2013),held in Beijing,China,13–17 October 2013.This conference has been initiated,with approval of     

Information for Contributors

The Transactions of Nonferrous Metals Society of China, founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, 1NSPEC, CA, METADEX, AJ and JICST.     

Formulas of Tension of Continuous Rolling Process

The development of computer controlled continuous rolling process calls for a mathematical expression that can express the inequality condition of "constant flow". Tension is the link of the continuous rolling process. From the condition of dynamic equilibrium, a differential equation of tension is given out. On the basis of the physical rules established from the industrial practice and experimental studies, the law of volume constancy, the linear relation of forward slip and tension, the state equation of continuous rolling, the formula of dynamic tension, and the formula of static tension have been obtained. These formulae reflect the functional relations between tensions, thickness, roll velocity, and time in the continuous rolling process. It is implied that the continuous rolling process is a gradually steady, controllable, and measurable dynamic system. An assumption of predicting the thickness of a steel plate using these tension formulae is also put forward.