查询词典 gravity force

LONDON - Eastern military - said the Chinese air force training in foreign countries lags behind the urgent need for new higher education machine - air force fighter trainer training Bidar PAKFA Air Force Air Force Air Force Base Education Training aircraft training system.

东方网-东方军事-外国称中国空军训练水平落后迫切需要新高教机-教练机空军战机空军飞机空军训练Bidar PAKFA 训练方法空军基地高教机训练系统。

The method divides block along the intersection edge of joint faces and neglects the vertical shear force between dividing-blocks i.e. takes horizontal normal force and shear force into account; as to an assumed sliding direction, by satisfying vertical force equilibrium of every dividing-block and whole force equilibrium in the sliding direction, the factor of stability can be solved.

基于此，提出分块极限平衡分析法，该方法沿非临空面交棱将块体进行分块，在忽略分块间的垂向剪力（即可考虑分块间的水平法向力和剪切力）前提下，通过满足各分块的垂向力平衡和滑动方向上的总体力平衡，求解特定滑动方向的稳定系数。

In addition, the blank holding force that is required to avoid wrinkle and rupture during conical part deep drawing is researched. The necessity of reasonable blank holding force in pressing is expounded. From the view of mechanical analysis, the wrinkle critical condition of side-wall is derived for the first time by the stress state of side-wall, the main deformation region on blank. According to the critical condition of plastic instability for flange, side--wall, corner of punch on blank, The blank holding force in conical part deep drawing is divided into four different regions within its forming figure. The basic principle of reasonable blank holding force during stamping is summarized and provided. The mathematical model of reasonable blank holding force that avoids the wrinkle and rupture is established and verified by the finite element numerical simulation and the grid experiment method. The result shows that it is accurate and reliable.

此外，本文还研究了圆锥形件拉深成形过程中，随着拉深变形过程的进行，毛坯为避免产生起皱、破坏缺陷而对压边力的需求情况，阐明了圆锥形件拉深成形过程中压边力合理变化的必要性；由毛坯主要变形区悬空锥壁部分的受力变形情况，从力学分析的角度，首次推导得出了圆锥形零件悬空锥壁起皱失稳的临界条件；并根据主要变形区法兰、悬空锥壁及凸模圆角部分的塑性失稳临界条件，在其成形范围图中，将圆锥形件成形过程中的压边力划分为四个区域；总结并提出了圆锥形件成形过程中压边力合理变化的基本原则；建立了防止起皱、破坏缺陷产生的压边力合理变化的数学模式，并得到了有限元数值模拟及网格实验法的验证，证实了理论分析结果的正确性和可靠性。

Based on the law of universal gravitation and Coulomb's law, the law of gravity, weak force, strong force and unified force are founded.

统一力定律能够把万有引力定律、库仑定律、弱力定律、强力定律这四个基本力定律统一起来。

The results show that, the distribution of magnetic field and electromagnetic force in the aluminum film on the cathode slope are in symmetry to the long axis of the cell, especially the magnetic force is in the same direction as the gravity force, which is in favor of the aluminum discharging from the cathode slope. The highest fluctuation of aluminum pad surface in the accumulation sump is 0.021 m, which still remains within the safe range, and will not cause interpolar short circuit, so a normal operation process could be maintained with the same bus bar configuration as the current 75 kA aluminum reduction cells.

结果表明：阴极斜坡表面电磁场和电磁力场分布基本呈沿电解槽长轴对称分布，且电磁力与重力方向相同，这有利于阴极表面电磁力向聚铝沟排放，而在电磁力作用下，聚铝沟内铝液波动最大幅度为0.021 m，仍保持在安全范围之内，不会引起两极短路现象的发生，表明在现有75 kA普通预焙槽母线配置方案下，可以维持导流型结构电解槽的正常运行。

As the viscosity of the fluid,such as water and air,is in general small,the viscous force seems to be ignored while compared with other forces,such as inertia force, gravity and press force.

实际流体流动时，由于流体受粘性的影响，在流体表面附近会形成沿法线方向速度变化较快的薄层，这一层我们称之为边界层。

But the counter-force phenomenon could occur and the indication of testing dynamometer would be influenced.The paper presented the exchanging weights principle based on counterpoising the elastic force and the gravity of weights and introduced a preloading device used as force balancing in exchanging weights.

在实际应用中，静重式力标准机利用少量砝码，以1，2，2，5，10(或1，1，2，5，10)方式进行组合[6]，实现等力值间隔(10%、20%、……100%Fnom)逐级加、卸荷；当力标准机作递增、递减试验时，在加卸荷过程中需要交换砝码，当砝码进行交换时会出现逆负荷现象[1，5]。

When inertia force ofa transmission shaftdoesnotchange, itsmaximum transversaldisplacement is equal to the sum of the static deflection produced by inertia force and gravity and the amplitude ofdeflection induced by eccentric mass, and when inertia force of a transmission shaft changes, dynamic deflection is produced.

惯性力不变时，传动轴的最大横向位移等于惯性力和重力产生的静挠度与质量偏心产生的动挠度幅值之和；惯性力变化时，传动轴产生动挠度。

Kempers' study , the more layers the mesh screen type had, its resistance against gravity was higher, but its heat resistance and flow resistance were comparatively augmented. As mentioned in the preceding paragraph, it is extremely difficult for a single micro structure based on any of the three types to possess both low flow resistance and strong capillary force. Faced with this fact, the researchers have tried to mix the three micro structures in Table 2 into as many combinations as possible so that a composite micro structure with low flow resistance and great capillary force may be fabricated. After a thorough analysis, the groove combined with sintered metal or mesh screen has been found to be a better alternative. However, the groove combined with sintered metal will raise the flow resistance of the channel, and the aluminum substrate employed in this research cannot be sintered into a micro structure. As a result, the groove combined with mesh screen is finally chosen as the composite structure to enhance its capillary force and at the same time maintain its high permeability. In this way, the heat pipe will not fail due to the working angles.

Kempers 的研究当中提到，当网格结构越多层时，其对抗重力的能力也越强，但相对的其热阻以及流阻也越高，就如同前段所述，我们很难在单一结构当中找出一流阻低且毛细力之微结构；因此本研究便以表2中之三种微结构进行组合，找出一低流阻且毛细力强之复合式结构，经分析发现，沟槽搭配烧结以及沟槽搭配网格为较佳之组合方式，但由于烧结搭沟槽构造将会提高流道之流阻，且本研究使用铝做为基材，并无法使用烧结最为其微结构，故将采用网格搭配沟槽之复合式结构提高结构的毛细力，并维持沟槽结构的高渗透性，解决因角度造成热管失效的问题。

Relative techniques are introduced, such as spherical gemel hoisting mechanism that made the active docking ring rotating in three-dimensional direction, intelligent gravity balance technique that could provide the force with high speed and precision to balance gravity and could automatically follow with the active docking r.

介绍了有关技术：主动环实现三轴转动的球铰吊装机构；能够高速度、高精度地提供重力平衡力，并能实现自动随主动环上、下运动的智能型重力平衡技术；保证平衡器随主动环随动的轮轨式二维平动技术，经轻量化设计，其摩擦阻力和惯性阻力很小，并对轮轨式方案进行了试验，当量摩擦系数仅为

Great. What repertoire did you see?

太棒了。你看的是什么剧目？

I prepared not to accept such ridiculousness:"Please," I said to him.

我可不想理会这套荒谬的东西："请你通情达理一点儿。"