有限模型

A harmonious production planning problem for multiple Open-Shop product lines with limited buffers was studied r, and an interaction structure for the products of up-down stream was proposed.

研究了一类带有限缓冲区的上游多Open-Shop生产线协调生产计划问题，建立了上下游生产线产品关联结构，并以此为研究对象，得到了成本最低生产计划模型。

Model checkers and theorem provers are all used to verify specifications of protocols. However, they are different. The former verify specifications in finite space, while the later prove some conclusions in infinite space.

模型检查和定理证明都是对协议的规格说明进行验证，不同的是，前者是在有限的空间中进行检查，而后者是在无限的空间证明结论。

Based on Wavelet Packet Analysis and Smoothed Pseudo Wigner-Ville Distribution, the experiment data is time-frequency analyzed. The experimental results indicate that the amplitude of the laser-induced acoustic waves increases with the laser energy; the frequency coverage is from 0 to 150 KHz, and in the meantime there is a peak located at about 25 KHz. In addition, the spectrum and the peak of frequency are basically stable in spite of the change of laser energy and target texture.

从基本的空泡动力学理论出发，推导了空泡各特征参量之间的关系，进而对空泡动力学模型进行了修正；采用有限差分法对空泡脉动进行数值模拟，得到了空泡脉动特性随液体粘性、空泡含气量、表面张力以及可压缩性的变化规律；实验上采用光偏转测试装置探测了激光空泡脉动以及空泡溃灭的细节过程，进而分析了液体粘性和作用激光能量对空泡脉动周期、泡半径及泡能等特征参数的影响。

The major concern during laser irradiation of teeth is the high potential of tissue overheating resulting high temperatures that can spread in toward the dentin,causing irreversible damage to cells presented in the pulp chamber and leading to cell death,so the related laser irradiation parameters should be controlled strictly.

激光辐照牙齿时所产生的温升容易引起牙髓细胞不可逆的损伤，导致牙髓细胞坏死，因此必须对相关的激光参数加以控制。建立了激光与牙齿相互作用的热传输模型，利用Crank-N icolson有限差分法数值模拟了不同Nd∶YAG激光参数照射下牙齿表面及内部的温度场的分布。

Mathematical model of hydrodynamic action in the free abrasive wire saw slicing process was established.

建立了游离磨料线锯切片过程中流体动压效应的数学模型，并采用有限差分法进行了数值分析，得到了游离磨料线锯切片的流体动压力分布和膜厚。

The second part is about the modeling of the wing structure using the Finite Element Software ANSYS. The theory of sandwich plate is adopted to analyze the sandwich wing-shaped structure.

第二部份针对制作出的三明治翼型结构，使用复合材料三明治梁板的理论来分析，建立ANSYS有限元素分析模型。

The RANS governing equation and RNG κ-ε turbulence model were used, and the flow fields at different relative positions between blade and volute tongue in a centrifugal pump were simulated by using finite volume method, under the hypothesis of steady flow.

本文选择RANS方程和RNGk-ε湍流模型，采用有限体积法，在假定流动定常的前提下对离心泵中叶片与蜗舌不同相对位置时的流场进行数值模拟，总结分析了各性能参数的计算误差在不同的相对位置时的变化规律。

Although multi-stream heat exchangers are widely used in process industries such as gas processing and petrochemical industries, much work during the last two decades is focused on conventional two-stream heat exchanger networks.

但是过去的20多年里人们把大部分精力用于传统的双流股换热器网络综合的研究，有关多流股换热器网络综合问题的数学模型及求解技术研究目前仍然很有限。

Models of middle-segment oblique fracture without defects were established and fixed by 14-hole stainless steel AO limited contact-dynamic compression plate, using 6, 10, and 14 screws separately. The stress-strain index under torsion, three-spot bending and compression of the complete fresh tibia was determined again statistical analysis.

然后制成中段斜行无缺损骨折模型，以14孔不锈钢AO有限接触型动力加压接骨板固定，分别使用6， 10， 14枚螺丝钉，测定扭转、三点弯曲、压缩等应力－应变指标，进行统计学分析。

In order to make the best of limited traffic detectors, understand the traffic performance of urban road network, and then take effective management measures, the paper puts forward a loop detector-layout method called "close-loop", and a method for estimating link traffic flow and OD matrix for local urban road network. A theoretical model is established based on the stability test of turning split of intersections by real data, and the uniqueness of assigned link flow and OD matrix is discussed.

为利用有限的交通采集设备，实现全面掌握城市路网交通运行状况、快速有效制定管理措施的目的，提出了一种&封闭环&式检测线圈布设方式和城市局域路网交通量与OD矩阵估计方法，以交叉口转弯比例稳定性实证研究为基础，建立理论模型，并探讨路段分配流量和OD估计唯一性问题。

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％。