加速度

The acceleration of an object is directly proportional and in the same direction as the net force on the object, but inversely proportional to the mass of the object.

一个物体的加速度与它所受的净力直接成比例且具有相同的方向，而与这个物体的质量成反比，或。

As an object falls freely, it accelerates due to the applied net force.

当一个物体自由下落时，其加速度取决于所受的净力。

Newton's second law formula: F = ma (F is force, m is mass, a for acceleration) and so on.

牛顿第二定律计算公式：F=ma（F为合力，m为质量，a为加速度）等。

Newton's second law of motion: The acceleration of a body is directly proportional to the applied force and inversely proportional to its mass.

牛顿第二运动定律：物体的加速度和所受的力成正比，和它的质量成反比。

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。

Because this algorithm use precision normal acceleration model, precision of tracking maneuvering target of algorithm is very well.

由于该算法对法向加速度精确建模，所以对机动目标的跟踪精度较高。

These Fos-immunopositive neurons were intensively distributed in different subnuclei of the vestibular nucleus complex (including medial, superior and spinal nuclei), nucleus of the solitary tract, locus coeruleus, medial and lateral parabrachial nucleus of the brainstem, paraventricular nucleus of the diencephalons and the amygdala of the limbic system;(3) The expression of Fos protein can be scarcely detected around forementioned regions in brains of the rats following complex two-axes rotation stimulation after the bilateral labyrinthectomy.

结果显示：(1)正常对照组和双侧迷路毁损组大鼠的脑内均未检测到Fos样免疫阳性产物；(2)两轴旋转刺激组的大鼠在给予复杂的围绕两轴旋转的加速度刺激后，在大鼠脑和脑干的多个核团内均可检测到Fos样免疫阳性神经元，其阳性产物主要表达于细胞核。

Forward and inverse kinematics, velocity and acceleration problems were solved in detail via complex number notation in this dissertation.

本文采用复数向量表示法详细分析了机器人的运动学的正、逆问题，速度、加速度正、逆解问题。

Using Matlab and its Add-ons Simulink, through establishing simulation maths model, the paper integrates open chain vector equation, numerical value simulation (computing velocity and displacement while given acceleration) and matrix algebra, etc.

利用MATLAB及其附加软件Simulink，通过建立仿真数学模型，综合开环矢量方程、数值仿真(在加速度已知时计算速度和位移)、以及矩阵代数等来完成机器人动态仿真，对所研究的机器人运动学分析结果进行验证，结果基本一致，为机器人的后续研究，如动力学，控制等奠定基础。

A linear filter is adopted in the system to obviate the measurement of angle acce...

系统实现时，构造了一个线性滤波器以避免转子角加速度的测量，同时实现了转速的闭环跟踪。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！