查询词典 arch

Dynamic model of satellite is built up with astronomic method, and a short-arch forecast arithmetic of satellite orbit in short arch with single site is given, which is of high precision when only angle data is available.

本文使用了天文方法建立了人造卫星运动的数学模型，给出了一种只使用单站短弧段测角数据对人造卫星轨道进行高精度预测的算法。

Based on the equilibrium equation of an arch element the cubic nonlinear dynamic model with second order is established and the nonlinear differential dynamic system without constant term is obtained through a transfer process of T=U+b. Hence three fixed points and the homoclinic orbits are found. The critical condition of the chaotic vibration of the elastic arch is given by using the method of Melnikov function. The numerical results of the stationary and chaotic motion are given and discussed.

首先利用拱的单元平衡方程建立了拱的二阶三次非线性动力学模型；然后通过变换使方程转化为不含常数项的非线性微分动力系统，并由此得到无扰动系统的3个不动点与同宿轨道；再用Melnikov函数法给出了发生混沌的临界条件；最后给出了该系统出现定常运动和混沌运动的数值结果。

The measurement covered the tooth material,premolar diametre,premolar basal arch widthand basal arch length. The ratios of PMD/TM, PMBAW/TM and BAL/TM were calculate.

测量牙量、双尖牙弓宽径、双尖牙根尖基骨宽径、基骨弓长度，并计算PMD/TM、PMBAW/TM、BAL/TM值，对其进行统计学处理与分析。

The stability of arch dam mainly depends on the support force of downstream rockmass behind abutment of dam. If discontinuity and weak intermitted layer is existed in rockmass, abutment of arch dam will slide probably under pulling force and shear force at the both side of dam.

拱坝的抗滑稳定主要是依靠坝端下游岩体的支承，拱坝两岸山体在拱端推力和剪力的作用下，如果岩体中存在着不利于稳定的节理、裂隙或软弱夹层，便可能引起坝肩滑动。

Gradually turned into two feet to walk upright, hand, foot and division of labor, will use stones, sticks and other natural tools; body structure compared with Dryopithecus progress, dental arch into the arch, the teeth arranged more closely, canines are not prominent, molar greater occlusal surface, the dolphin's back back, stands about 1 meter, the brain is about 300 milliliters; mainly eat plants, and carnivorous.

逐渐变为两足直立行走，手足分工，会使用石块、木棒等天然工具；身体结构较森林古猿进步，齿弓成弧形，牙齿排列较紧密，犬齿不突出，臼齿有较大咬合面，吻部向后退缩，身高约1米多，脑量约300毫升；主要以植物为食，兼食肉类。

Then, the endogen force generated by vehicle load is calculated, and the comparison of endogen force between compound arch bridge and ordinary arch bridge is also carried out.

其次，对复拱桥在汽车荷载作用下的内力进行了计算，并与相同跨径的普通拱桥内力进行了对比。

First, the endogen force of the compound arch bridge generated by dead load is calculated, and the influence of job practice is full considered when calculating the combination operation of the construction upon the main arch.

首先，对复拱桥在恒载作用下的内力进行了计算，在考虑拱上建筑联合作用时充分考虑了施工方法对拱上建筑联合作用的影响。

In the third part, the theory of thrust angle and unbalanced forces is studied andapplied to Xiluodu arch dam. some conclusions are obtained :(1) The thrust angle issmaller by elaso-plastic computation than elastic computation. For the non-linearcomputation, the thrust angles at different elevations all increase during overloading,which reveals the internal mechanism of good performance of arch dam in conditionof overloading;(2) The elaso-plastic theory always minimizes the actual unbalancedforces in the sense of a condition number in the norm ofcomplementary energy.

第三部分，通过对溪洛渡拱坝拱端推力角及不平衡力的研究，得出如下结论：(1)非线性计算较弹性计算的推力角大；对于非线性计算而言，拱坝超载过程中各高程段的推力角均有所增加，这反映了拱坝具有较高超载能力的内在机制；(2)在总余能范数的意义上，按弹塑性本构关系确定的不平衡力或加固力是最小的，弹塑性计算确定的加固力和真解相比偏于安全。

The structure and function of the flatfoot are different from those of the normal foot. To identify their differences, the rearfoot motion, the arch index, and the lateral arch angle are important reference points.

由於足部结构的不同，造成扁平足族群的足部功能与正常足有所差异，其中后足运动、足弓指标与足弓角度相关性都是观察此差异的重要指标。

To get calculation process of analytical solution for predicting the shape of ground arch in bearing soil by studying the theoretical solution for Calculating the shape of ground arch in free soil and Considering the effect of load.

并在此基础上给出了土体中不利于作用荷载的区域，在此区域内作用荷载将会引起隧道周边及荷载作用位置处的塑性区范围显著增加。

These are places without aristocratic baggage; egalitarian places open to talent, self-improving, engaged in learning and innovation through networks that were at once competitive and cooperative.

这些地方没有贵族遗风作祟，而且对于那些有天分的人是开放的平等之地，这些人善于通过那些曾经很具有竞争力与合作精神的关系网进行自我提高以及学习创新。

Christine: You don't want to see me?

你不想见我？