生产方法

The foam skeleton vaporizes during heat treatment and the metallic particles sinter together to create the product .

这种方法被认为是最经济有效的大规模工业化生产泡沫产品的方法。

The pattern of the tyre of agricultural vehicles has to fit in with the inclement working situations of the vehicles,which brings some difficulty to the pattern block mold design of the tyre.

文章介绍了农用轮胎的特点和轮胎模具的生产流程，然后结合轮胎花纹块的铸造、抛光、机械加工等工艺要求，阐述了农用轮胎花纹块模具设计方法并导出计算公式，内容包括：径向断面的工艺尺寸设计、轴向与周向的展开与弯曲设计；提出采用Coons曲面构造出模具内腔壁曲面的方法。

So, the paper brings out a feed forward cascade PID control method in order to optimize control process according to technological flow and control theory. It promotes the system stability and decreases the cost of the water process.

通过分析处理工艺流程及生产控制原理提出了前馈串级控制的控制方法，利用该控制方法对控制过程优化，提高了系统适应能力，降低了污水处理加药费用，同时保证了回注油田污水的质量。

Based on copper plastic processing features, the metal rolling theory and the practical procedure, the paper presents the design method of the copper bar rolling mill pass system and the calculation methods of the factors. Some key factors, such as the elongation factor and filling metal degree through the pass system at every rolling segment, and some dynamic factors are calculated for small and middle copper bar rolling mills.

根据铜加工塑性加工特性及金属连轧理论，结合生产过程，文章提出了中小直径铜杆连轧机整个孔型系统设计方法和参数计算方法，计算了各轧制道次延伸系数、各道次孔型金属充满度等关键参数，并对连轧机中的动态参数进行了计算。

The plastic deformation mechanism of the process is explained. The vector equations of the curved conical surface and the figure of the particle motion for the forming process of the bending tube are presented. The theoretical model of stress and strain fields of the forming process is deduced. The practical forming process of tubes of large diameter demonstrates the validity of the new type of design method of the ox-horned core bar and the computation formula of the length of the raw tube.

本文通过研究弯管成形瞬时应力、应变状态及演化过程，阐明了弯管成形过程受力变形特点及力学原理；提出了一种适合弯管变形分析的新单元及数值方法；建立了弯管成形过程应力、应变场&标准图象&；通过研究弯管成形过程金属流动规律及力学条件，阐明了本工艺塑性变形机理；建立了描述弯管成形过程的曲锥面向量方程及其质点运动学图象；推导了弯管成形过程应力、应变场理论模型；结合大口径弯管生产过程，验证了本文给出的新型牛角芯棒设计方法和管坯长度计算公式的正确性。

By using of dynamic fuzzy group method, the top coal cavability was evaluated according to the following seven factors, such as coal seam strength, mining depth, crack developing extent's features, dirt band height, filling situation of goaf, classification of main roof and the ratio of mining and caving height etc.

运用动态模糊聚类方法，以煤层强度、赋存深度、节理裂隙发育程度、夹矸厚度、采空区充满程度、老顶级别、采放比等7个因素按模糊最大隶属度原则综合评价顶煤冒放性。建立了模糊聚分析方法的数学模型，以上述7个指标为基础，对顶煤冒放性的模糊聚类分析进行运算，给出分类的实施过程。潞安矿区顶煤冒放性分类结果表明， 5对主要生产矿井主采3号煤层，其顶煤冒放性皆为好和较好，经潞安矿区综放开采实践证实，分类合理

On the basis of summarizing separation method of acetic acid-water system, we studied the azeotropic distillation process of acetic acid-water system, selecting butyl acetate, isobutyl acetate and isopropyl acetate as entrainers. The influence of packing height, ratio of water to entrainer and acetic acid initial concentration to separation effect of azeotropic distillation was studied in detail. Simulation calculations of general distillation and azeotropic distillation were carried out. The influence of reflux ratio, theoretical plate, feed position, feed temperature and feed concentration to distillation process were discussed. Preferred process operation parameter, which had guiding meaning to practical production of distillation process were obtained. Basic data for the process amplifying design of azeotropic distillation tower were provided. Invest and operation energy consumption of two distillation methods were compared. The elementary technical design of azeotropic distillation tower was carried out on the basis of result of simulation calculation. The type of major auxiliary equipments and inner parts of packed tower were selected.The research results are as follows:(1) Butyl acetate, isobutyl acetate and isopropyl acetate could be selected as entrainer, and separation effect was near.

本文在综述醋酸-水体系分离方法的基础上，以醋酸丁酯、醋酸异丁酯、醋酸异丙酯为挟带剂，对醋酸水溶液进行共沸精馏过程研究，详细研究了填料高度、水与挟带剂的配比、醋酸初始浓度等对共沸精馏分离效果的影响；对醋酸-水体系进行普通精馏和共沸精馏过程模拟计算，讨论了回流比、理论板、进料位置、进料温度和浓度对精馏过程的影响，获得了对醋酸-水体系精馏过程实际生产具有指导意义的较佳的工艺操作参数、共沸精馏塔的工艺设计放大的基础数据，并对两种精馏方法的投资、操作能耗进行了比较；同时在共沸精馏模拟计算的基础上进行了共沸精馏塔的初步工艺设计计算，并对填料塔的主要辅助设备及塔内件进行了初步选型。

Based on the risk analysis,the method of acceptable risk standard on national safety work is proposed.To improve the scientificity and adaptability of the risk standard,the risk standard research frame,making special studies such as data analysis,method,technology and procedure are probed into.

从风险分析的角度出发，提出了我国安全生产方面的风险标准界定方法，设计了我国风险标准研究框架，尽快开展我国风险标准界定的基础资料分析、技术方法以及程序等研究，提高我国风险标准的科学性和适用性。

These features, along with high-precision processing technologies have helped to miniaturise these products. The micropump is 6.0mm in diameter and 24.0mm in length, the microvalve measures 3.5mm in diameter and 10.3mm in length. The products are small but ensure high functionality by incorporating fluid, structure and magnetic field analysis simulations. Development will contribute to enhanced miniaturisation, an indispensable prerequisite for portable device fuel cells. Through the optimal design of diaphragm operations, valve configuration to prevent fluid backflow, materials and layout, Alps has achieved the effective control of larger amounts of fluid in a smaller chassis for its micropump. The unit also employs low-voltage electromagnetic drive systems, which contribute to easy control and fuel cell system engineering.

这 2002：机床，入世是挑战更是机遇专家指出要加大我国数控机床研发力度加快普及型数控机床的发展漫话中国机床制造业的服务竞争中国铣床和加工中心市场的现状和展望国内外车床的技术水平和发展方向世界加工中心的生产、需求和发展动向国内外机床发展趋势世界数控系统发展趋势切削加工技术和数控机床的发展现代机床产品技术发展趋势我国高速加工技术现状及发展趋势利用先进制造技术提升汽车活塞加工水平瓶盖及瓶口模具上特殊螺纹的数控车削深孔的螺纹加工数控车床螺纹切削方法分析与应用磨削蜗杆砂轮的修整精密零件多台阶面磨削的新方法曲轴连杆颈的跟踪磨削工艺

UV and NIR were used for online detecting in this study. Furthermore, some chemometrics algorithms such as SMLR, PCR, PLS, SVM, etc. were used to establish the rapid quality evaluation methods of the raw materials, intermediates and preparation of Qingkailing injection. This study provided an example of online quality control of Chinese medicine injection and oral liqid. The formula of Qingkailing injection is composed of cholic acid, hyodeoxycholic acid, Cornu Bubali, baicalin, Radix Isatidis, Fructus Gardeniae, Flos Lonicerae Japonicae and Concha Margaritifera.

本研究采用适合在线检测要求的紫外光谱和近红外光谱分析技术，结合逐步多元线性回归、主成分回归、偏最小二乘和支持向量机等化学计量学方法建立清开灵注射剂生产原料药、中间体和成品的快速质量评价方法，为中药注射剂及口服液的在线质量控制提供研究思路。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐