粉末

The production and marketing of P/M parts in china in 2006 is introduced.

本文介绍了2006年我国粉末冶金生产状况和市场变化，分析了当前我国粉末冶金零件产业面临的挑战。

The effect of six types of powder activated carbon on decolorizing of maltose solution was studied.

研究了六种不同的粉末活性炭对麦芽糖液的脱色效果，结果表明，粉末活性炭F的脱色效果较好，且对麦芽糖液中的色素吸附符合Freundlich方程。

The growth process of nanocrystalline copper particles into single crystals, induced by electron irradiation, has been observed by TEM, and Kikuchi lines exist in its electron diffiaction microphotograph, indicating that the thickness of the single crystal formed by electron irradiation is more than 100nm.

用γ射线辐照法成功地制备出Ag-Cu及Au-Cu合金粉末。通过改变实验条件如调节溶液中金属离子的浓度比则可控制所制备合金的组成。因此，发展γ射线辐照法制备合金粉末具有重要的应用价值。

At last, feasibility of using powder metallurgy material for micropore filter is analyzed in theory, and the recondition control structure and fundamentals of powder metallurgy micropore filter are designed.

从理论上分析了使用粉末冶金微孔过滤器作为排气微粒净化的可行性，并设计了粉末冶金微孔过滤器的再生控制结构及原理。

MMD has advantages on selectively deposition and less contaminated on background. MMD is equal or better than powder.

多重金属沉积法具有选择性吸附强、背景污染小等特点，其显现效果与粉末法相当，甚至优于粉末法。

The research result shows that the flowability, moldability, cohesiveness of high performance concrete of hill sand are significant by comparison with ordinary concrete on mechanical properties, long term properties, and durability. Motar flowability decreases with the increase of single-mixed active additive. The flowability can be largely improved by double mixing of active additive and super plasticizer NF. This is because not only the active additive has filling effect but also the dispersing effect induced by surface action between additive and super plasticizer NF. And the optimal content of materials are: super plasticizer NF≥0.8%, fly ash 20%, PS 20~30%,zeolite powder≤20%,SF 5~8%; The negative influence of hill sand powder should be avoided by controlling of powder content and the use of active additive and super

研究表明：随着单掺活性掺合料掺量的增加，砂浆流动性减小，活性掺合料与萘系高效减水剂NF双掺使用，比使用同样剂量萘系高效减水剂NF的基准浆体流动性明显增大，这是由于玻璃体材质活性掺合料不仅有填充效应，更主要的是它与高效减水剂之间的表面物化作用产生了分散性，而活性掺合料对浆体的流化作用效果主要是依赖于其分散性；能有效改善胶砂流动性的适宜掺量为：萘系高效减水剂不小于0.8%，粉煤灰掺量为20%，PS掺量为20~30%，沸石矿粉掺量不宜大于20%，SF掺量为5~8%；通过对粉末含量的限制，并借助活性掺合料、高效减水剂的合理使用，就可以避免山砂粉末含量的负面影响，配制出密实度高，抗渗性能优异，具有良好的耐久性能，并具有良好的体积稳定性的山砂高性能混凝土。

Hydrogen nitrate powder acidizing is to mix solid hydrogen nitrate powder and hydrochloric acid in certain proportions to generate strong oxidizing nitrosyl chloride, which can violently and locally dissolve rock and blocked material without destroying formation structure, to make through oil path and improve formation permeability.

硝酸粉末酸化工艺技术，是利用固体硝酸粉末与盐酸以一定的比例混合后，生成氧化能力很强的氯化亚硝酰。

The effect of the amount of silica powder and sulfuric acid employed as well as polyacrylamide added on the properties of the gel electrolyte was studied and the mechanism of the peptization of silica powder to form thixotropic silica gel electrolyte was discussed.

研究了SiO2粉末和H2SO4用量及聚丙烯酰胺添加量对凝胶电解液性能的影响，并分析讨论了SiO2粉末胶溶形成触变性硅凝胶电解液的机理和特点。

Soybean powder phosphatide was hydrolyzed by phospholipase A_1,and the optimum conditions were investigated.

利用磷脂酶 A1对大豆粉末磷脂进行水解，通过实验确定了大豆粉末磷脂酶解的最佳反应条件为：反应时间9 h，反应温度50℃，起始pH 5.1。

This study refers to the conditions of practical powder metallurgy manufacture process, and proceeds to experiments and gear precision measurements as well as investigation on the effects of two parameters, powders and pitch circle radius, on gear precision. The relationship between gear parameters and gear surface deviations was derived from the mathematical model for the involute helical gears and the analysis of gear surface deviations.

本论文将采用实际上粉末冶金螺旋齿轮的制程条件，进行试作实验与齿轮精度的量测，以探讨粉末及螺旋齿轮之节圆半径这两个制程参数对於齿轮精度的影响；同时应用齿轮创成原理所推导之螺旋齿轮数学模式，配合齿面变异分析，求得齿轮设计参数改变量与齿面变异量之关系。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。