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The results show that the CNTs are dispersed effectively by bell jar immersing precast block casting. The maximal tensile strength and the elongation of the AZ31/CNTs composites are enhanced by 41.3% and 119.4%, respectively, and the elastic modulus and micro-hardness are also raised by 67.8% and 66.9%, respectively, when compared with those of the as-cast AZ31 Mg alloys. The CNTs can greatly refine the grains of the composites, playing a good role in reinforcing the matrixes of AZ31 Mg alloy. The fracture sections of the composites mainly consist of dimples and prisms, which demonstrates quasi- cleavage fracture modes.

结果表明:钟罩压块法可以有效地将碳纳米管分散到镁合金熔体中;CNTs对AZ31镁合金的力学性能有较强的增强效果,与本研究中的铸造AZ31合金相比,AZ31/CNTs复合材料的最大抗拉强度和伸长率分别提高41.3%和119.4%,弹性模量和显微硬度分别提高67.8%和66.9%;CNTs对AZ31镁合金基体晶粒的细化作用显著,与镁基体界面结合较好;复合材料试样断口形貌由韧窝和撕裂棱组成,呈现准解理断裂特征。

The technological condition of preparation of mesh TiO〓/Ti catalyst was optimized by means of XRD and SEM with the analysis of effects of dyes photoelectrocatalytic degradation. The diameter of TiO〓/Ti catalyst particle was nanometer level The effects of bias voltage and light intensity on the process of photoelectrocatalytic oxidation, the adsorption property of electrode surface, the extent of mineralization of rhodamine B and rose bengal were investigated using mesh TiO〓/Ti as catalyst of photoelectrocatalytic oxidation system.

利用拉曼光谱和XRD等测定手段并结合染料的光电催化降解效果的分析,优化了丝网TiO〓/Ti催化剂制备的工艺条件,研制出高效丝网纳米级TiO〓/Ti催化剂,并将该催化剂用于光电催化氧化体系,研究了氧化体系中外加偏压、光强等因素对光电催化氧化过程的影响以及催化剂的表面吸附性能、染料若丹明B和虎红在光电催化氧化过程中的矿化程度。

An introduction is made on the application of an air supply low pressure jet aeration system in an improved oxidation ditch in the treatment of the liner board effluent with a detailed introduction and analysis on the commissioning of the operational process.

介绍了采用供气式低压射流曝气系统的改良型氧化沟用于箱纸板废水处理,并对整个调试运行过程进行了分析。改良型氧化沟采用全好氧曝气,沟中不存在缺氧区和厌氧区,抑制了传统氧化沟中的硝化与反硝化作用,降低了营养盐的投加成本,具有很强的抗冲击能力。

Light weathering theory,basic structures and characteristic of carbon arc lamp and xenon arc lamp acceleration weathering tester have been described.

塑料、涂料等高分子材料在使用的过程中经常出现起泡、变色、开裂和脱落等现象,严重影响产品的物理机械性能和表观质量。汽车外装部件诸如前后灯、格栅、保险杠、中央挡泥板和各种外部饰条等长期暴露在自然环境中,必然要求其具有较强的抗老化能力。

Compared with commission plan and mayor-council, the city-manager plan has proved very successful by improving performance of municipal administration effectively to meet the need of city development, and has been widely adopted by various sizes of cities.

在此过程中,委员会制逐步衰落;市长暨议会制虽无较大起落,但其主要形式已过渡为&强市长型&;城市经理制显示出强大的生命力,它有效地改善了市政管理,适应了城市发展的需要,被越来越多的城市相继采用,成为美国城市中采用面最广的市政体制。

In this project, the selection criteria of matrix and reinforcement for obtaining composites with high strength and toughness are determined. The as-cast and aged microstructures of composites reinforced with particles of different strength are observed, and their metallurgical conditions and stabilization mechanisms are analyzed. The aging precipitation behaviors and mechanisms are studied. Some characteristics of nano-materials (micro-distortion areas) are found in 150nm- Al2O3p/Al composites and their formation mechanisms are expatiated. The "flexible" restriction to the deformation of the matrix by low strength AlN particle is observed by in-situ TEM and SEM techniques, and the mechanisms of its resist on cracks propagation and its contribution to composite strength are revealed. The high temperature deformation behaviors of Al2O3p/Al composites are studied. A rare-earth coating is established on sub-micron Al2O3 particles, leading to an improvement in wettability between coated Al2O3 and liquid aluminum and a decrease in infiltration pressure. The strength and ductility of coated particles reinforced composite are also increased. The interfacial characteristics, bonding structures and their formation mechanisms are studied, and the crystal orientation relationships between reinforcement particles and aluminum matrix are investigated. Finally a lighter composite with better balance of strength and damping properties is reinforced with hollow ceramic microballoons of ultra-lower strength.

本项目发现了获得高强度和高韧性复合材料的基体、增强体选择依据;观察了各种强度质点增强复合材料的铸态和时效态微观组织,分析其微观结构形成的金属学条件及稳定性机理,研究了其时效析出规律和时效机制,发现了150nmAl2O3颗粒增强铝基复合材料基体中的纳米材料特征,并解释了其形成机理;利用TEM和SEM动态拉伸技术发现了低强度质点AlN颗粒对变形协调的&柔性强化&机制,揭示了其对裂纹扩展的阻碍作用和对复合材料高强度的贡献;研究了中强度质点的Al2O3颗粒增强铝基复合材料的高温变形行为,并对其进行了稀土界面层设计与制备,改善了颗粒与铝合金之间的界面润湿性,降低了复合材料铸造渗透压力,提高了复合材料的强、韧性;研究了多种复合材料界面结构及形成机理,确定了增强体与基体之间的界面结合机制,分析了复合材料界面处的晶体学位向关系;最后制备了含微孔的中空型陶瓷颗粒增强的特种复合材料,得到了强度和阻尼综合性能较好的轻质复合材料。

The causes for the popularization of tree cotton in Shandong vary from governmental policies to its adaptability to increasing social and economic demand for cotton.

指出了中棉的传播原因,有官方劝种的因素,有中棉适应性强的因素,还有社会需求量加大的经济社会因素。

The mechanism of co-fluorescence effect has been discussed. In chapter six, the new fluorescence enhancement phenomenon was observed by adding some crown ethers to samarium-thenoyltrifluoroacetone system.

在第六章中,研究发现当向钐-噻吩甲酰三氟丙酮中加入配位能力很强的大环配体冠醚时,冠醚对稀土有机配合物体系产生显著的荧光增强作用,其中冠醚二苯并18冠6后(DB18C6)可使钐-TTA二元配合物体系荧光强度增强280倍。

Also showed that the viscosity of agate strong, so that glaze in the air within the carcass, in the firing process can not normally overflow, more closed in the glaze of the lower deck; sesame sticks nail glaze met:.

同时表明,玛瑙的粘度很强,以致釉内与胎体中的空气,在烧制过程中无法正常溢出,较多的被封闭在釉的下层;芝麻支钉釉满足:。

The advantage of Servicemix: 1, be based on JBI standard; 2, can heat up deploy; 3, supportive Camel (can develop compositive technological process with DSL); The defect of Servicemix: 1, JBI standard was brought use those who go up is trival, and JBI standard did not gain too much favour, the future was not predicted; 2, depend on the configuration of XML too much; 3, because all messages want to undertake standardizing handling, be generated namely and analytic XML file, can bring about function to drop so; 4, frame of implementation of the need in developing a process is specific interface is received and handle afore-mentioned standard informations, invade a gender strong; 5, documentation is not quite diseased, clear; The advantage of Mule: 1, the framework is simple clarity, easy begin; 2, it has very extensive transmission implement, road by implement with converter, and expand easily; 3, mule does not need to change the word into unified format, and have transition when need only, improved performance; 4, mule code need not pay close attention to in developing a process, need to pass configuration to be able to expose the service only, decreased to invade a gender; 5, documentation is clear and perfect; The defect of Mule: 1, did not implement any ESB standards but abided by " Enterprise Intergration Patterns " with SEDA?

Servicemix的优点: 1,基于JBI规范; 2,可以热部署; 3,支持Camel(可以用DSL去开发集成流程); Servicemix的缺点: 1,JBI规范带来了使用上的繁琐,且JBI规范没有得到太多的青睐,前途未卜; 2,过多依赖XML的配置; 3,由于所有消息要进行标准化处理,即生成和解析XML文件,所以会导致性能下降; 4,开发过程中需要实现框架特定接口接收和处理上述标准消息,侵入性强; 5,文档不健全、不够清晰; Mule的优点: 1,架构简单清晰、容易上手; 2,它有非常广泛的传输器、路由器和转换器,且易于扩展; 3,Mule不需将消息转换成统一的格式,而只在需要时进行转换,提高了性能; 4,开发过程中无需关注Mule代码,只需通过配置即可将服务暴露,减少了侵入性; 5,文档清晰而完善; Mule的缺点: 1,没有实现任何ESB规范(但遵循了《Enterprise Intergration Patterns》与 SEDA?

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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

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。