查询词典 conservative force

Differential Quadrature Method, one of numerical methods of solving boundary problem of differential equation is introduced in this paper. By using DQM, the dynamic stability of pipes conveying fluid and rectangular plates under the action of non-conservative force is studied. The main research work is as follows.

本文首先介绍了求解微分方程边值问题的一种数值方法—微分求积法，然后采用微分求积法分别对输流管道和非保守矩形薄板的稳定性问题进行了分析研究，具体有如下三方面的研究内容。

The high precision electrostatic accelerometer is one of the key payloads for Earth's gravitational satellite, and its sensitivity parameters directly determine non-conservative force measurement, and eventually influence the precision of Earth's gravitational field recovery, so that it needs to be calibrated in-orbit.

用于检测微弱信号的高精度惯性传感器，其设计过程中的一个重要环节是分析检验质量的引力场分布。

The non-conservative impulsive force that represents the chemical energy consumed in the conformation changing process is a crucial factor to the directed motion of the Brownian motors.

非保守脉冲力反映构象变化过程中消耗的化学能，是一个影响布朗粒子运动的重要因素。

We have done some exploratory work from several aspects to generalize the Brownian motor to the more real situation: The model which molecular motor has internal degree of freedom; The track on which the Brownian particle moves cannot be completely ordered and contain certain amount of disorder, the model is rocking ratchets with stochastic potentials; A two-dimensional ratchet model with a non-conservative force to realize the coupling between the mechanical and chemical processes.

目前大多数的研究工作是把分子马达抽象为一维的点粒子，我们在推广布朗马达到更真实的方向上开展了以下几个侧面的研究分子马达动力学行为的探索性工作：分子马达具有内部结构的电偶极子模型；考虑分子马达的轨道不规则、不光滑的摇摆棘轮模型；提出一个具有非保守脉冲力场的二维棘轮模型。

In this paper, firstly, the new combined error model of cumulative geoid height influenced by three error sources including the inter-satellite range-rate of K-band ranging system, orbital position of GPS receiver and non-conservative force of accelerometer from GRACE satellites is established using the semi-analytical method. Secondly, the dependability of error models is demonstrated based on matching relationship among the accuracy indexes of key payloads. Finally, the accuracy of global gravitational field up to degree and order 120 is effectively and rapidly estimated from GRACE Level 1B measured observation errors of the year 2006 publicized by the Jet Propulsion Laboratory in the USA, and the cumulative geoid height error is 18.368 cm at degree 120, which preferably accords with the Earth's gravitational field model EIGEN-GRACE02S provided by the GeoForschungsZentrum Potsdam in Germany.

首先基于半解析法建立了新的GRACE卫星K波段测量系统星间测速、GPS接收机轨道位置和加速度计非保守力误差联合影响累计大地水准面的误差模型；其次，基于各关键载荷精度指标的匹配关系，论证了误差模型的可靠性；最后，基于美国喷气动力实验室公布的2006年的GRACE Level 1B实测误差数据，有效和快速地估计了120阶全球重力场的精度，在120阶处累计大地水准面的精度为18.368 cm，其结果和德国地学研究中心公布的EIGEN-GRACE02S全球重力场模型符合较好。

It is wrong of David Cameron, the Conservative leader and probable next prime minister, to ring-fence the National Health Service, which has been force-fed with extra money under Labour, from real cuts.

David Cameron是保守党的领袖，也很可能是下一任英国首相。他将国家医疗系统排除在外的做法是错误的。工党执政期间，从实际削减中拿出额外资金，强行补贴国家医疗系统。

After considering the earth rotation and non-conservative forces energy dissipation, the energy conservation equation was presented. The formula of the gravitation potential and tide-generating force additional potential of sun and moon were given in detail.

给出了地心惯性系下顾及地球自转和非保守力能量损耗的能量守恒方程，并且对日、月摄动位与引潮力附加位的计算方法作了相应的分析，同时介绍了加速度数据的处理方法。

It is wrong of David Cameron, the Conservative leader and probable next prime minister, to ring-fence the National Health Service, which has been force-fed with extra money under Labour, from real cuts.

他将国家医疗系统排除在外的做法是错误的。工党执政期间，从实际削减中拿出额外资金，强行补贴国家医疗系统。

The structure is under aerodynamic force, mass force and elastic force, the amplitude of which is increasing on and on.

结构在气动力、惯性力和弹性力耦合作用下，出现的幅度不断增加的振动现象。

And the six-component force sensor system designed for the compound test on the aerodynamic force and inertia force is developed in this paper. The main work is as follows.

六分力传感器能同时检测到三维空间的全力信息，是随着机器人技术的发展而出现的一种新传感器。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。