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Simulated results show that the directivity and the gain of the array are improved.

模拟结果表明，天线阵的方向性以及增益都得到了加强。

The directivity of emitter by changing the number and relative location of ultrasonic transducers are simulated.

通过改变换能器数目及之间的相对距离，模拟了超声发射阵的空间指向性。

Both the Dirichlet and the periodic boundary conditions are considered for solving the local microscopic model when the water flow in heterogeneous unsaturated soils is simulated by FDHMM.

在应用FDHMM模拟非均质非饱和土壤中的水流问题时，对于局部微观模型的求解，我们既考虑Dirichlet 边界也考虑周期边界。

The topic in view of the existing technique level, the main factors, which influence the measurement precision of the large scale test system, are analyzed in this paper, and the solutions improving the precision are put forward.1 using the multi-channel independent AC to transfer DC module, the power supply of the digit part and the simulation part is discerption, reducing the crosstalk between the digital signal and the simulated signal;2The feedback self-checking module is constructed by singlechip compositive 16 high accuracy A/D , established a closed-loop control system through this module and improved system's overall precision effectively.

本课题针对现有的技术水平，分析了影响大型检测系统测量精度的主要因素，提出了提高精度的具体方案和办法：1采用了多路独立交流转直流模块，数字部分与模拟部分分开供电，减小了数字信号与模拟信号之间的串扰。2利用单片机集成的16位高精度A/D构建了反馈自检模块，通过该模块建立了一个闭环控制系统，有效地改善了系统的整体精度。

The matching device automatic test-board is the checking tool checked the matching device capability, precision and reliability are the technique of the the matching device, the precision is the precondition of checking the matching device, the reliability is credibility degree of the decision checking consequent.the topic in view of the existing technique level, the main factors, which influence the measurement precision of the large scale test system, are analyzed in this paper, and the solutions improving the precision are put forward.1 using the multi-channel independent ac to transfer dc module, the power supply of the digit part and the simulation part is discerption, reducing the crosstalk between the digital signal and the simulated signal;2the feedback self-checking module is constructed by singlechip compositive 16 high accuracy a/d , established a closed-loop control system through this module and improved system's overall precision effectively.

匹配装置自动测试台是检测匹配装置性能的检测工具，其重要的技术指标是精度与可靠性，其高精度是作为检测匹配装置的前提，可靠性是决定了检测结果的可靠度。本课题针对现有的技术水平，分析了影响大型检测系统测量精度的主要因素，提出了提高精度的具体方案和办法：1采用了多路独立交流转直流模块，数字部分与模拟部分分开供电，减小了数字信号与模拟信号之间的串扰。2利用单片机集成的16位高精度a/d构建了反馈自检模块，通过该模块建立了一个闭环控制系统，有效地改善了系统的整体精度。

The integrated GPS/INS position, velocity, pesudorange and pesudorange rate hare been simulated respectively. U-D discompose algorithm is used to Kalman filter.

分别进行了GPS/INS位置、速度组合和伪距、伪距率组合仿真，仿真中组合Kalman滤波器采用数值稳定性较好的U-D分解算法。

In this paper, one of the particle discrete element method named particle flow code in 2-dimensionPFC~(2D is used. Based on the results of lab tests, sand behavior under monotonic and cyclic loading is simulated from the aspect of association of macro and micro scope.

本文利用颗粒离散元法中的二维颗粒流方法，以试验研究结果为基础，从宏细观结合的角度对单调与循环加荷条件下砂土的力学性质进行了细观模拟。

Methods The medicine storage scale for disaster relief was dynamically simulated by using DAMANO programming language of System Dynamics and was calculated with discrete algorithm using FORTRAN programming language.

运用系统动力学的DAMANO等语言编程进行动态模拟灾害医学救援药材储存的规模，也可用FORTRAN等语言编程进行离散计算求解。

We will utilize tabu search and simulated annealing to determine the discrete decisions. Then, by using the discrete decisions, a mathematical programming model, proposed herein, will be used to solve the continuous decisions.

求解方法为先利用塔布搜寻法或模拟退火法找出离散决策，再带入一个以最小化总存货成本为目标的数学规划模式，以求解出连续决策的值与目标函数值。

With the help of the method,the casting process of the aluminum matrix composite brake disk was simulated by ProCAST code.

并在该方法的指导下，借助ProCAST模拟软件，对铝基复合材料制动盘的成型过程进行模拟。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。