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Based on the semi-vector wave equation under cylindrical coordinate system, the mode distribution and complex propagation constant in bent waveguides were computed by a finite difference method with perfectly matched layer (PML) boundary condition.
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摘要以柱坐标下的半矢量波动方程为基础，采用基于完美匹配层(PML)边界条件的有限差分方法，对弯曲波导进行模式求解，进而得到波导弯曲引起的辐射损耗。 |
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Based on the sequence forecast theory of grey system, a forecast model is established for the ground subsidence caused by exploitation in No. 1 Coal Mine of Xinfeng Coal Mining Bureau.
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摘要根据灰色系统数列预测理论，建立了新峰一矿地表沉陷的灰色预测模型。 |
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Based on the shear theory of Newtonian viscous liquid, the fusible damp coefficient is established for electromagnetism dynamic polymer Extruder screw's axial vibration system.
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摘要对聚合物电磁动态塑化挤出机螺杆轴向振动系统，根据牛顿型粘性流体的剪切理论，确定了聚合物熔体的阻尼系统。 |
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Based on the simple modelling calculation, the multiplicity and angular distribution of evaporated fragments from both projectile and target spectators in high energy nucleus-nucleus collisions are described.
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摘要在高能核－核碰撞中，基于简单的模型计算，描述了来自弹核和靶核旁观体的蒸发碎片的多重数分布与角分布。 |
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Based on the simplified payoff matrix, we find, the condition under the stronger learning ability and the upper Spillover, the firm can reduce its adoption cost since the technology innovation adoption is delayed, and the diffusion will take place.
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结合简化后的支付矩阵对企业创新采用策略进行了分析，得出了在学习能力强、溢出度高的环境下，延迟采用策略可以减低企业的采用成本。 |
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Based on the simplified structure of rock mass, FLAC(superscript 3D) numerical modeling technique is used to systematically analyze the distribution features of the secondary stress field, strain field and plastic zones in the surrounding rock mass of the
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摘要在岩体结构模型概化的基础上，采用FLAC(上标3D)数值分析方法，系统研究了澜沧江某大型水电站大跨度、高边墙地下洞室群开挖完成后围岩的二次应力场、变形场和塑性破坏区的变化特征。 |
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Based on the simulation analysis of plural cracks, the theoretical basis of flaw in screw detected by alternative magnetic flux leakage testing method was established, the detection was decomposed to four phases and the signal characteristics of each stag
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摘要在参考国内外对相邻缺陷漏磁信号进行仿真分析的基础上，建立了螺纹中缺陷检测的理论基础。 |
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Based on the simulation framework of High Level Architecture (HLA) and the thought of object-oriented program design, the paper design a general-purpose framework for air-raid target stream in the form of federate in detail.
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摘要基于高层体系结构(HLA)仿真框架和面向对象的程序设计思想，对空袭目标流联邦成员（简称邦元）的通用框架进行了详细设计。 |
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Based on the simulation results, the effect of operation conditions on the catalytic distillation in preparation of ethylbenzene from dry gas was analyzed, meanwhile, an optimum condition was proposed.
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以模拟结果为依据，考察了各工艺条件的影响，并提出了催化蒸馏法干气制乙苯过程适宜的工艺条件。 |
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Based on the simulation results, the region and the degree of cavitation occurred in the flow passage of the turbine with a low water level at the outlet of the draft tube are examined, the cavitation performance of the turbine is also evaluated.
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根据模拟结果，考察了水轮机在低尾水位下运行时流道内空化发生的部位和程度，并对水轮机的空化性能进行了预估。 |
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Based on the situation of resource shortage, cost-first strategy and past experiences, the author offers an analysis on the idea of cost effectiveness and on how a technological engineer can lower product cost and improve enterprise efficiency on the prem
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摘要从我国资源短缺状况、成本领先战略与历史经验，论证了在大力推进技术创新的前提下，工程技术人员树立成本效益的观念，能从研发设计的源头降低产品成本、提高企业效益。 |
