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Using numerical simulation technology and method of orthogonal experiment design and single factor rotating optimization, this thesis makes a study of "lost core injection ", thus achieve the optimization of the parameters of molding process, to offer basic reference when developing production technology and mould of the plastics intake manifold. Based on the study of the status in quo and development trend of weight reduction on automobile, the application of plastics to automobile and intake manifold, then under the guidance of theory model and numerical simulation technology in the process of high polymer material, this thesis launches flowing main research work: First of all, on the basis of the three-dimensional model of the part and finite element net model, several designs of gating and running system are numerically simulated and analyzed via MPA of Moldflow.

本文在对当今汽车轻量化、零部件塑料化以及的汽车进气歧管塑料化的发展现状和发展趋势进行了研究和简要介绍，然后在高分子材料成型过程中的理论模型和数值计算方法的指导下，展开主要的研究工作：首先，在零件三维模型和有限元网格模型的基础上，使用Moldflow 的MPA模块对塑料进气歧管的多个浇注系统设计方案进行数值模拟，通过分析各个方案的充填质量、熔接线位置及数量等指标，得到了综合质量较高的4 个进料口的浇口位置及半限制型浇口大小的浇注系统。

In this paper, based on the dynamic explicit finite algorithm, the multi point stretch-forming processes of sphere and saddle parts, with different thicknesses, different materials, different deformations and other technical parameters are simulated.

文章基于动力显式有限元算法，从板厚、材质、变形程度和塑性指数等工艺参数入手，对球形和鞍形件的多点拉形过程进行数值模拟。

Simulated using the ANSYS finite element software the quantity of heat when it transmits from the room to outdoor through the core board material under the winter condition.

采用稻草板与聚苯乙烯泡沫板复合作为复合墙体的保温材料，利用ANSYS有限元软件模拟冬季条件下热量由室内通过该保温材料向室外的传递。

With the wild-simulated method, seeds are planted finy thinly in the forest.

研究显示对健康有益，也会有不同的效果。

Wenling Jingwei Aquatic Products Co., Ltd. is Zhejiang agricultural leading enterprise, focusing on production and distribution of minced fish products. Its main products include fish ball, simulated crab meat stick, Shaoyifan and so on.

温岭市经纬水产食品有限公司是浙江省农业龙头企业，以鱼糜制品生产、销售为主的企业，主要产品有鱼丸、仿蟹肉棒、烧一番等。

The simulated results show that the fishtail shape coefficient is high when the feed velocity is relatively low and will be reduced with increase of feed velocity.

结果表明：进给速度相对较小时，环件鱼尾形状系数较大，随着进给速度进一步增大，鱼尾形状系数反而减小。

By the method of transforming the node DOF of the space bar element to the node DOF of the space virtual laminated element ,that is,the node of bar element need not fixed on the node of space solid element,the prestressed concrete structure were simulated together.

通过自由度变换，把空间杆单元的节点自由度用空间虚拟层合单元的节点自由度来表示，即杆单元的节点无需固定在体单元节点上，共同模拟了预应力混凝土结构。

By reviewing of the existing algorithms in CGE model, such as Scarf fixed point method, Newton-Raphson method, Tatonnement method, Johanson-Euler method, projected Lagrange method, genetic algorithm and simulated annealing algorithm, this paper expound each algorithm's principle and main problems, pointed out their respective strengths and weaknesses, and finally made a detailed comparative analysis.

本文通过对现有的求解算法进行综述，包括传统的Scarf不动点算法、牛顿迭代法、Tatonnement算法、Johanson-Euler法、投影拉格朗日算法，以及近期兴起的遗传算法和模拟退火算法，扼要说明它们的求解原理及存在的问题，指出各自的优缺点并作了详尽的比较分析与探讨，对于致力于推进CGE建模与仿真求解技术瓶颈突破的研究者们具体重要的参考意义。

It Simulates the street intersection changing restriction and road section available condition with transition matrix and a flag bit , which simulated the simply limitd road network .

首先，在综合分析和研究已有的基于路网的k近邻查询方法基础上，改进了Island方法中的路网建模部分，用过渡矩阵及一个标志位来模拟路口转向限制以及路段是否可用状况，从而模拟了简单受限路网。

The ignition and its flame spreading test system of the modular charges in the natural environment is built up, a number of ignition and its propagation methods are simulated, the characteristic parameters of the system in the natural environment are obtained.

本文针对刚性组合装药的点传火技术进行了一些基础性试验研究和理论分析，建立了自然环境下刚性组合装药的点传火试验系统，并对多种点传火方案进行了模拟试验，获得了点传火系统在自然环境下的重要性能参数。

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％。