膨胀

The results show that dynamical ductil-ity dominated final velocity of fragments. During tube expansion, the shear fracture appears preferentially a-long the adiabatic shear bands under positive stress, so the adiabatic shear band determines the size and shapeof fragments. Though the fragmentation behaviour of medium carbon Si - Mn bainific steel is close to that ofsteel 50SiMnVB, medium carbon Si - Mn bainitic steel is an ideal candidate material for the tubular bombs be-cause it is better in dynamical ductility, which can enable the tubes to gain high speeds before fragmentation.

结果表明：材料动态塑性是决定破片最终速度的主要因素；圆管膨胀时外表面形成以剪切为主的裂纹，并向内扩展，接近内表面的绝热剪切带伴随着圆管的膨胀而扩展，并未出现失稳现象，但在正应力的作用下成为优先的断裂通道、决定破片的尺寸和形态；中碳Si-Mn贝氏体钢与50SiMnVB钢的破碎性能相近，但贝氏体钢动态塑性很更好，破碎前的膨胀量较大、更有利于提高破片初速，是弹箭比较理想的候选材料。

On the roof of coal bed are consists of the mudstones in dark-gray or grizzle which will expand met water and wet air, with higher expansion stress and coefficient.

煤层顶板为深灰色和灰色泥岩，该岩石遇水和潮湿空气产生膨胀，膨胀应力和膨胀率大。

A cryogenic air separation system wherein feed air is compressed in a multistage primary air compressor, a first part is turboexpanded and fed into a cryogenic air separation plant, and a second part is turboexpanded and at least a portion of the turboexpanded second part is recycled to the primary air compressor at an interstage position.

一种低温空气分离系统，其中进料空气在一台多级初级空气压缩机中压缩，使第一部分进行透平膨胀后送入低温空气分离设备，使第二部分进行透平膨胀后，将已透平膨胀后的第二部分中的至少一部分再循环回到该初级空气压缩机的级间位置。

Taking LOI and vertical burning methods as main measures to estimate the flame retarding efficiency of materials, the effects of each ingredient were studied. With the aid of thermal analysis, the mechanism of chemistry reaction, intumescence and charring were discussed.

以氧指数法和水平燃烧法作为考查阻燃性能的主要手段，研究了聚乙烯膨胀阻燃体系各组分对阻燃性能的影响，并结合热分析的方法对聚乙烯膨胀阻燃体系热降解过程的化学反应机理、膨胀机理、成炭机理进行探讨。

Based on the above results of macro expansion and microstructure studies, the limitation of the early ASR expansion mechanism has been noted, and the new ASR models for aggregates with various texture and structure have been put forward. The early expansion mechanism was suitable for interpreting the behavior of the high reactive aggregate with only one constituent.

在对结构构造特征不同的集料的膨胀行为和ASR反应特征的分析研究基础上，指出了早期以单一组分的高活性集料的实验为基础提出的ASR膨胀机理的局限性，提出了具有不同结构构造特征的活性集料ASR模型，拓展了对ASR膨胀机理的认识。

As the pods puff up and up and up, consciousness that is biological asserts itself in an expanded space between of darkness.

当这 些小密团不断膨胀，膨胀和膨胀时，其中的生物性意识就开始在一个扩张的黑暗间隔空间中发威。

Capable of producing aluminate, sulphoaluminate, admixture three series over 10 varieties, main products are cement, PAC, low alkalinity aluminum sulfate cement, hard-Express expansion sulphoaluminate Cement, double-quick cement, concrete expansion agent, quick-setting agent, efficient sealing agent, aluminum powder and calcium, such as expansion of the clinker.

能生产铝酸盐，硫铝酸盐，外加剂三大系列十多个品种，主导产品有铝酸盐水泥、聚合氯化铝，低碱度铝硫酸盐水泥，特快硬微膨胀硫铝酸盐水泥，双快水泥，混凝土膨胀剂，速凝剂，高效堵漏剂，铝酸钙粉和膨胀熟料等。

Experimental results indicate that for the polystyrene particle with a larger size, Umf changes with p-0.3, and for the sand particle with a smaller size, Umf changes with p-0.21. An empirical equation about Umf is proposed based on the experimental data: Umf=μdp ρg｛［(34.15)2+0.05916×dp3 ρggμ2］12-34.15｝ It is found that the bed expansion height increases with the increasing of gas velocity, and increases with pressure for fixed value of UUmf, when the pressure exceeds 0.7MPa, the influence of pressure on the bed expansion height is weakened.

研究结果表明，大粒径聚苯乙烯颗粒的Umf与p-0.3成比例，小粒径石英砂的Umf与p-0.21成比例，并根据实验值拟合出压力下最小流化速度公式为： Umf=μdp ρg｛［(34.15)2+0.05916×dp3 ρggμ2］12-34.15｝床层膨胀高度随气速的增大而不断增高，在相同UUmf下床层膨胀高度随压力的增大而增高，在大于0.7MPa时，压力对膨胀高度的影响减弱。

Ecological control of sludge bulking is highly important, especially in preventing sludge bulking through ecological relationship such as prey and autoeciousness of microorganisms.

指出丝状菌污泥膨胀的实质是活性污泥微生态系统平衡失调，微生物群落结构与功能发生变化，丝状菌种群代替菌胶团菌群成为优势种；利用微生物种群之间的捕食、寄生等关系控制污泥膨胀的生态学调控方法，是实现控制丝状菌污泥膨胀，保持污泥微生态系统稳定，获得良好污水净化效果的治本之法。

According to thermal characteristics of single component, dilative action was analyzed for mixture from the viewpoint of thermal effect.

通过对典型膨胀体系（即聚磷酸铵、三聚氰胺、季戊四醇）中单一活性物质及其混合物的DSC分析，探讨了不同组分之间热效应的叠加现象和相互作用，从热效应角度分析了膨胀反应，初步探索了复杂膨胀现象中物理化学变化的热特征。

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。