微观研究

For this project, in virtue of the experimental observations on the vertical vibrator,the invert torsion pendulum and the vertical pipe with capillary outlet,and by using numerical simulations of the discrete element method, the mixing and segregation of granular materials of spherical and neraly spherical shape with the different size and different density under the vertical vibration or parallel shear motion have been researched, and the relationship between the macroscopic segregation properties and the microscopic characteristics of granular materials and the outer actions has also explored. The theoretical model and method describing the mixing and segregation of granular materials is developed.

本项目通过在垂直振动台、倒扭摆、带毛细出口的竖直玻璃管等装置上进行实验观测，并采用以离散元方法为主的数值模拟，研究了具有不同粒子尺寸、密度的球形或近球形颗粒物质在具不同结构形状容器中垂直振动和剪切运动时的粒子混合和偏析情况，探索颗粒材料流的宏观偏析特性与微观特征量及外部作用间的关系，发展描述颗粒物质混合和偏析的理论模型和方法。

Then, the microstructure of the potato starch paste after the ultrasonic treatment was observed by means of SEM.

在此基础上，结合扫描电镜分析研究了超声场中马铃薯淀粉糊微观结构的变化。

Based on the local sources, a new kind of aerated concrete containing efflorescence sand phosphorus slag lime was studied in order to develop the new type wall materials for the Three Gorges Migration Project. The result indicated that by taking the efflorescence sand as the main silicate material and phosphorus slag as a part of substitute materials of calcium, qualified aerated concrete under the low dosage of cement could be produced.

为解决三峡库区移民工程新型墙体材料问题，针对当地资源分布，对风化花岗岩砂磷矿渣石灰加气混凝土的生产工艺参数和微观结构进行了研究，结果表明：采用风化花岗岩砂作为主要硅质材料，磷矿渣作为部分钙质代替材料，可以在低水泥用量下生产出满足国家标准的加气混凝土制品；该体系的主要水化产物是CSH、托勃莫来石、水石榴子石。

The microstructure and electrochemical properties of hybrids, combining single-walled carbon nanotubes and DNA, were investigated.

对单壁碳纳米管-DNA复合物的微观结构和电化学性质进行了研究。

Through the analyses of electronic structures, we study the field-emission property of capped single-walled carbon nanotube.

通过对碳纳米管电子结构的分析，我们从微观上研究了影响场发射阈值电压和电流的因素。

Compared with that of powder metallurgy,the silver tin oxide electric contact materials fabricated by reactive synthesis shows the better anti-erosion ability.

研究了用反应合成法和粉末冶金法两种工艺制备的AgSnO2电接触材料经激光扫描后的微观结构差异。

3Sn(C72500) alloy after shearing deformation and then annealed at 550 ℃ for 2 h were observed by OM and SEM.

采用金相显微镜和扫描电镜研究Cu-9Ni-2.3Sn(C72500)合金经剪切变形后合金切面的微观组织以及随后在550℃退火2 h后切面的组织变化。

The shear plane microstructures of Cu-9Ni-2.3Sn(C72500) alloy after shearing deformation and then annealed at 550 ℃ for 2 h were observed by OM and SEM.

摘 要：采用金相显微镜和扫描电镜研究Cu-9Ni-2.3Sn(C72500)合金经剪切变形后合金切面的微观组织以及随后在550 ℃退火2 h后切面的组织变化。

The micro-character of weld line in copper tubes with inner grooved by high frequency welding for air-conditionings and refrigerators was briefly studied,the existent manner and the reason of quality problem were found out,betterment measure was put forward and realized,the problem in the production was settled and the product quality became stable.

通过对空调与制冷用高频焊接内螺纹铜管焊缝微观组织特性的研究，找出了焊管质量问题的存在方式及其产生原因，提出了改进方法并加以实现，最终解决了生产中存在的问题，使产品质量得到了稳定。

In the process of self-propagating magnesium reduction synthesis of Ti powder,the effects of carbon addition on phase composition, chemical composition,microstructure of TiC_(1-x)N_x powder were investigated.

在自蔓延高温镁热还原反应制备Ti粉体的研究中，考察了配碳量对TiC1-xNx粉末的相组成、组成成分和微观组织的影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。