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951.
V M Rashkovan N A Khizhnyak A V Basteev L A Bazyma Luis Ni?o de Rivera I A Ponomaryova 《The Journal of microwave power and electromagnetic energy》2003,38(4):225-235
The basic correlation is defined which characterizes an influence of electromagnetic radiation on a system of individual particles of ellipsoidal geometry dispersed into some volume (chaotic arrangement) of another medium. The field intensity inside one isolated particle is determined depending on the parameters of the external (relative to the volume) electromagnetic field. Energy loss in an isolated particle is calculated. The shielding effect of a field in an isolated particle by other surrounding particles is taken into account. The relative dielectric permittivity and the relative loss tangent as a function of grain moisture content are measured. Drying and disinfestation of wheat grain by electromagnetic methods are observed. 相似文献
952.
953.
Data dependence uniformization, a method for overcoming the difficulties in parallelizing a doubly nested loop with irregular dependence constraints is proposed. This approach is based on the concept of vector decomposition. A simple set of basic dependences is developed from which all dependence constraints can be composed. The set of basic dependences is added to every iteration to replace all original dependences so that the dependence constraints become uniform. An efficient synchronization method is presented to obey the uniform dependence constraints in every iteration 相似文献
954.
水压爆破是一种控制爆破技术,它可在不动用机械设备情况下,用水作为介质,把炸药的爆炸能传递给待拆构筑物,达到破碎的目的。本文介绍采用水压爆破拆除钢筋混凝土工事的设计与实施,爆破取得圆满成功。 相似文献
955.
在考虑爆轰波与孔壁相互作用及孔壁的可压缩性等主要因素情况下,根据爆轰理论和流体动力学原理,建立了计算偶合装药点起爆时孔壁动态初始参量的物理模型,给出了计算公式。计算了中等威力炸药(如2#岩石炸药、乳化炸药和水胶炸药)在混凝土中爆炸时孔壁动态初始参量(如初始冲击波压力、速度等值),得到了自起爆点开始沿炮孔长度方向各参量的变化规律、并得出了一些有意义的结论。 相似文献
956.
Amir A. Kamouneh Jun Ni David Stephenson Richard Vriesen Garrold DeGrace 《International Journal of Machine Tools and Manufacture》2007,47(7-8):1257-1262
High-volume production of precision external-involute helical gears using flat-rolling is impeded by a number of quality issues. Experimental resolution of these issues is expensive and time consuming. The present study utilizes finite-element models (FEM) to diagnose three of these quality issues and to explore possible solutions. Two- and three-dimensional (2D and 3D) ABAQUS models were developed for a specific gear-manufacturing process and resulting geometries were not satisfactory. Subsequently, 3D DEFORM simulations were developed for the same process. Numerically predicted geometries were benchmarked against actual results obtained through designed experiments. Finite-element modeling and experimental results were correlated and the models were validated. Possible solutions were simulated and analyzed through additional modeling. Results obtained from the initial pass of the 3D models have been promising although progress has been limited by the excessive computational time needed. Frequency of re-meshing, high number of elements due to fine mesh, and changing re-mesh criteria contribute to the computational difficulties. 相似文献
957.
958.
Ni Zhao Fu-Chun Sun 《IEEE transactions on systems, man, and cybernetics. Part B, Cybernetics》2004,34(6):2422
In this correspondence, we point out some lethal errors in the proof of the theorems given in the aforementioned paper. 相似文献
959.
在异常高压油藏储层中,储集层渗透率随地层压力下降而急剧降低,渗透率变化系数是重要的特性参数。本文研究了异常高压油藏稳定渗流规律,建立了利用系统试井资料求取渗透率变化系数的方法。 相似文献
960.