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The linear vibration problems under periodic exciting force and general exciting force are numerical analysis by barycentric Lagrange interpolation collocation method.

利用重心Lagrange插值配点法分析了周期激励和一般激励下线性振动问题。

Cut file, sawing skills by learning the grip, standing position, body movements, and many other points force factors and the impact of the traditional grip of the emergence of file-grip handle to stand up after slightly outside the site of the palm, when a file cut Force, after the file handle a gradual shift,"hold" to "grasp", resulting in the introduction file enough; saw grip handle full point higher than the thrust of the saw blade to install center hole of about 30mm, the high point of thrust is likely to result in the bow saw On both sides of the swing, resulting in a broken saw blade and saw seam askew.

锉削、锯削技能的学习是受握法、站立部位、身体动作、作用力点等诸多因素的制约和影响的，传统的握法出现握锉柄后顶住部位稍偏离手心，锉削时一用力，锉柄逐渐后移，"握"变成"抓"，造成锉刀推出力度不足；满握锯柄的推力点高于锯条安装孔中心约30mm，偏高的推力点很容易造成锯弓向两侧摆动，造成锯条折断及锯缝歪斜。

Five main stalk crops planted in northern China including wheat, corn, broomcorn, soybean, and millet, were chosen to be the samples of the experiments. About seven morphological traits (such as plant height, ear length, ear weight, moisture content and so on) were measured in the crop mature period. The maximum shear force during shearing process, through static test equipment, at the second internode of the basal stalk, was recorded. And shear strength of each crop was calculated to find the differences of shear strength among different crops. The optimal regression models of shear force and morphological traits were obtained by multiple linear regression method with Statistics Analysis System. The equation based on the regression models was constructed.

本文以北方主要茎秆作物（小麦、玉米、高粱、大豆、谷子）为研究对象，试验测定了成熟期茎秆基部第二节间的最大剪切力及株高、穗长、穗重、含水率等七种形态特性指标，获得了静载情况下相关样本的剪切强度；分析比较了不同茎秆作物剪切强度的差异性，并利用SAS软件对茎秆作物剪切力与形态特性指标进行了多元线性回归，得到了剪切强度对形态特性指标的最优回归方程。

Regaining new stable equilibrium he rose uninjured though concussed by the impact, raised the latch of the area door by the exertion of force at its freely moving flange and by leverage of the first kind applied at its fulcrum, gained retarded access to the kitchen through the subadjacent scullery, ignited a lucifer match by friction, set free inflammable coal gas by turningon the ventcock, lit a high flame which, by regulating, he reduced to quiescent candescence and lit finally a portable candle.

30他重新获得了稳定均衡，尽管因猛烈撞击而受震荡，却没有负外伤就站了起来。他使劲扳院门搭扣的那个活动金属片，凭着加在这一支轴上的初级杠杆的作用，把搭扣摘开，穿过紧挨着厨房地下的碗碟洗涤槽，绕道走进厨房。他擦着了一根安全火柴，转动煤气开关，放出可燃性的煤气。他调节那燃旺了的火焰，捻小成发白的文火为止。最后，点上一支便于携带的蜡烛。

Therefore, the centripetal force can only be supplied by can electromagnetic force.

那麽，这个向心力就只能是由电磁力提供的了。

Using the sectional force and torque balance method to consider the effects of load force and temperature,provides a more completeness and systematic mathematical model.The working characteristic of bimetal strip is expressed by equivalent network.

采用综合考虑负载作用力及温度影响的分析条形双金属片的截面力－力矩平衡法，给出了较完整系统的数学模型；将双金属片用等效网络表示，用网络分析手段求解温度继电器、热继电器的工作参数；分析了在比弯曲最大的条件下各层界面、表面应力关系。

CPL MS25K high speed camera (100Hz) was used to two-dimensional cinematograph analysis at sagittal plane, an AMTI force plateform (1000Hz), and a TEDEA-HUNTLEIGH load cell (1000Hz) to collect the value of pulling-force by Biovision feedback system, when the subjects raised movement after sitting during Tug-of-War.

以一台CPL MS25K高速摄影机（100Hz）沿受试者矢状面进行2D拍摄，并以一块AMTI测力板（1000Hz）以及一台TEDEA-HUNTLEIGH电子式拉力计（1000Hz），透过Biovision多功能回馈系统，同步撷取生物力学参数。

There are shovel blades equipped bottom of the cinquefoil shelf. When shovel blades rotate with rollers, they throw up the materials and send them into the space between rollers and ring and then form a material bed. The material bed produces centripetal force as a result of rotating of roller. The material is crushed by the centripetal force.

磨辊吊架下装有铲刀系统，其位置处于磨辊下端，铲刀与磨辊同转过程中把物料抛起喂入磨辊与磨环之间，形成垫料层，该料层受磨辊旋转产生向外的离心力碾压，达到制粉目的。

In this paper, the force-energy formula which is suitable for double groove ball section ring is deduced based on force-energy formula of closed rolling... of rectangular cross-section ring by using micro-element method.

本文在矩形截面环件闭式辗扩力能公式的基础上，采用微元法推导了适合双沟截面环件的辗扩力能公式。

The paper includes:The author calculate the structures inner force and displacement of the free end , analyze the influence of the height and the value of pretress of cable by making use of ANSYS 9.0 soft, pose the concept of critical prestress,conclude the function relation between displacement of the free end, initial strain and the height of cable ,analyze the dynamic properity and point out that Newmark-β method should be adopted when we analyze the dynamic properity of the cable-stayed spatial structure with direct integral test to guarantee the contribution of high mode,finally conclude the functional relation among coefficient of earthquake inner force, initial strain and the height of cable, wish to get some helpful conclusion applied to cable-stayed spatial truss design.

本文系统介绍了斜拉空间桁架竖向地震反应的分析理论与方法、详细分析了斜拉空间桁架结构在静力和竖向地震作用下的受力性能，主要内容包括：利用通用有限元软件ANSYS9.0计算了斜拉空间桁架在静力和竖向地震作用下内力及自由端位移分布规律并得出地震内力系数与节间位置、预应力以及斜拉索高度之间的函数关系；详细分析了斜拉索中施加的预应力以及斜拉索高度的变化对于该种结构内力及自由端位移的影响并提出了斜拉空间桁架的临界预应变概念，进而得到了自由端位移与初始预应变以及斜拉索高度的函数关系，即：△=-(40h+2180)ε+9.8；分析了该种结构的动力性能，并指出：在时域内采用直接积分法计算该种结构的动力响应时，应该考虑采用不引起振幅率减小的Newmark-β法，以保证高阶模态响应的贡献仍然保留在响应中而不致于被忽略。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷