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The segregation of the binary granular mixture in Brazil nut problem was simulated by using discrete element model. The influences of the frequency and the amplitude of the vibration on the segregation are discussed.

采用离散单元模型对巴西果问题进行了模拟研究，采用本数学模型可以准确地预测出垂直机械振动导致的不同大小颗粒的分离现象。

Five main phenomena were found, firstly, the high plasticity clay could well suitable to large deformation, and had strain-hardening behavior obviously, as well as, the little dilatancy; secondly, there was no correlation between stress paths and shear strength but the stress-strain relations were influenced by stress paths; thirdly, the little stress increment ratio, the higher increase speeding of shear stress and breaking strength under the condition of same initial normal stress; the fourth, the relations between normal strain and normal stress in simple shear test was consistent with which in the single-direction compression test, if there was no dilatancy; the last, the curve of relation between stress ratio and shear strain could be well simulated by hyperbola.

试验结果表明，高塑性粘土能够较好地适应大变形，接触面剪应力与切向应变关系呈剪切硬化型曲线，法向剪胀不明显；接触面剪切强度与应力路径无关，应力应变关系与应力路径密切相关；初始法向应力一定，应力增量比越小，剪应力增长越快，对应的破坏剪应力也越高；无剪胀发生情况下，法向应变与法向应力关系曲线与单向压缩试验具有一致性；应力比与切向应变呈良好的双曲线关系。

The data of forest inventory and stem analysis were used to build models about diameter breast-high, high of tree, volume of single timber, stand volume, and these models were correlative to age and stand density. The models were transforming into three-dimension graphs, and the stand growth processes were simulated to visual images.

利用林分调查和解析木数据建立了具有一定适应性的湿地松纸浆林胸径、树高、单株材积和林分蓄积模型，对生长模型进行了图形化表达，并对林分生长过程进行了可视化模拟再现。

In this paper, single phase bridge controlled rectifier circuit with resistance load and with resistance and inductance load had been simulated and analyzed in MATLAB.

本文使用MATLAB软件对带电阻负载和带阻感负载的单相桥式全控整流电路进行了仿真分析。

A simulated bridge deck is tested for durability and strength to determine its breaking point .

这个模拟桥面用来测试其耐力与强度，以确定断裂点。

The basic operational principle of bridge is simulated with application program of Windows in the dissertation, including repeater of frames, foundation and management of bridge MAC table.

本文在深入理解网桥核心技术的基础上，使用Windows应用程序模拟了网桥基本工作原理，包括帧的转发、MAC地址过滤表的形成与管理等。

In our work, some useful conclusions were obtained from axis-symmetry system, which are in accord with either the experimental results or the results of numerical simulation reported in foreign countries. An excentric Bridgman system which is an improved experimental system reported in a foreign country is also simulated.

本文进行的轴对称系统模拟得到了一些有益的结论，它们或者与已有的实验结果相符合，或者与国外报导的数值模拟工作相一致；本文还根据国外报导的一个改进的实验系统进行了偏心Bridgman系统的模拟。

Taking the seedlings of Quercus glauca, a dominant evergreen broadleaf tree species in subtropical area, as test materials, this paper studied their photosynthesis, chlorophyll fluorescence, and chlorophyll content under effects of simulated acid rain with pH 25, 40, and 56. After 2-year acid rain stress, the net photosynthetic rate of Q.

选择亚热带常绿阔叶林优势树种青冈幼苗为研究对象，设置3个酸雨处理：pH 2.5、pH 4.0、pH 5.6，研究不同强度的模拟酸雨对青冈幼苗光合特性、叶绿素荧光参数和叶绿素含量的影响。

The bulk modulus and formation factors of those 3D digital cores were simulated by finite element method.

应用有限元方法计算了重建数字岩心与真实数字岩心的体积模量和地层因素。

Firstly, the dynamic response of model experiment is simulated numerically in the case that TNT explosive is detonated on the upper surface of burster slab, and the results are compared with those of model experiment showing close agreement.

首先分析TNT装药在成层式工事遮弹层表面爆炸时结构的动力响应，并与试验结果进行对比分析，分析结果与模型试验吻合较好。

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％。