流出口

Relying on both dynamic and static analysis methods,both microstructure and macrostructure analysis methods,both on-line and off-line analysis methods,as well as both along-line sampling and die sampling techniques,the author of this thesis studied and developed an on-line microscopic system,the on-line rheometers and the on-line samplers which are used in single screw extruding process for the first time. Based on the analyses of a plenty of experimental results, the thesis mainly discussed following several questions: solid-bed break-up phenomenon on macroscopic scale,melting and deforming mechanism of a solid particle on small particle scale,and polymer morphology on microscopic scale.

本文作者通过把动态和静态分析相结合、微观和宏观分析相结合、在线和非在线分析相结合、沿程取样和机头出口样品分析相结合的方法，在单螺杆挤出过程的在线显微观察与摄影、在线流变测试、在线取样的大量实验分析的基础上，针对挤出过程中从宏观尺度范围的固体床破碎现象、到较小的颗粒尺度范围的固体粒子的熔融与变形、以至微观尺度范围的聚合物材料的形态结构的变化情况等有关几个的问题进行研究讨论。

Moreover, the cavitatig flow in poppet valve were simulated for different inlet velocity and different outlet area, respectively.

而且对锥阀在不同进口速度和不同出口面积的流场分别进行了模拟。

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。

The city is squalid and sinister, with the silver-barred street in the midst, slow-moving, a river leading nowhere.

这城市阴晦而苦闷，有银线条的街在它中心，慢慢的流着一条没有出口的河。

A sharp-pointed surgical instrument, used with a cannula to puncture a body cavity for fluid aspiration.

套针一种尖锐的外科手术器械，与套管一同使用刺穿体腔，作为液体引流的出口

And even if America's direct impact on Japanese exports is more muffled than before, its indirect one is substantial thanks to "triangular" trade flows.

即使美国对日本出口的直接影响弱于以前，由于&三角贸易流&的关系，其间接影响也不容小觑。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。