查询词典 velocity optimal

First, the phenomenon of the projectile-retarded mechanism of moving plates is introduced, the conditions of the projectile-retarded mechanism of moving plates is analyzed. By a number of numerical simulations, the residual length and residual velocity of the rod which penetrate the fixed plate is contrasted with those of the moving plate. Under the different velocity of moving plate, the relationship between the effect of the projectile-retarded moving plates with thickness and intersection angle of the projectile-retarded moving plates is achieved, and the most optimal thickness and intersection angle is gotten.

首先介绍了运动板抗弹作用的现象，分析了产生运动板抗弹作用的条件，利用数值计算的方法，对比了长杆侵彻固定靶板和运动靶板后长杆的剩余长度和剩余速度，分析了不同的运动板速度条件下产生运动板作用的条件，得出了运动板抗弹效果与靶板厚度和夹角的关系，得到了产生运动板抗弹作用的最优靶板厚度和夹角。

The aims of this paper are to derive the optimal error estimates of eigenpairs, i.e. the optimal error estimate of eigenvalues, and the new error estimates of velocity, pressure including the L~2 - norm and energy norm, respectively, in which the L~2 - norm estimate of velocity on anisotropic meshes has not ever been seen in the precious literature.

对于Stokes特征值问题本文不仅得到了征值对的最优误差估计即：特征值和流速压力的零模和能量模以及压力的能量模最优误差估计，其中在各向异性网格下对此问题的零模估计尚未见报道。

Thirdly, the problems of institution investor'optimal liquidation strategy and optimal liquidation time were investigated with the conditions that the price of risky asset followed arithmetic Brown motion and liquidation velocity was limited. The problems involved the following scenes: price impact function was linear expression of liquidation velocity which was boundary closed set with an isolated point; price impact function was stochastic; price impact function was nonlinear.

接着，当风险资产的价格服从算术布朗运动，且对投资者的变现速度做出限制时，研究机构投资者的最优变现策略和最优变现时间问题，其中包括：价格冲击函数为变现速度的线性函数，变现速度是一带有孤立点的有界闭集；价格冲击是随机形式；价格冲击是变现速度的非线性函数。

Simulation results indicate that genetic algorithm can solve this problem and find the global optimal value efficiently ,and it's insensitive to the initial guess. The optimal reentry trajectory can meet the requirements of attitude, heat flux and velocity.

仿真结果表明提出的方法能够较快地搜索到全局最优解，对初始猜测值不敏感，能够方便用于RLV的再入轨迹方案选择和优化设计。

Considering the effect of interval on the original estimation accuracy and noise factors, the optimal interval, which minimizes estimation errors, is derived. It is related with MT's velocity. In order to reach the optimal interval, joint velocity estimation and interval calculation are applied. Finally, the feasibility of proposed algorithms is discussed.

通过对AWGN信道下的COV速度估计精确建模，数值分析了协方差计算间隔对COV算法本身精度及噪声因子的影响；根据分析的结果，以归一化平均误差最小为目标对估计算法进行了改进，获得了基于COV的精确速度估计；最后还对算法的可行性进行了讨论。

Keywords slender workpiece;variable velocity;optimal adaptive control;neural network;prediction;fuzzy control

细长轴；变速；优化适应控制；神经网络；预测；模糊控制

Thus, the velocity magnitude is far bigger than that of optimal design velocity magnitude, which will lead to serious wear and tear in metal face of heater.

过去，主要用实验和理论分析的办法来确定整个尾部烟道的流场分布是否均匀。

In this paper, a path planning method based on GA is presented. Firstly, the model of the space robot is built to display the mapping of the end velocity and the joint velocity. Then the optimal algorithm based on genetic algorithm is presented to search the optimal solution which minimizes the disturbance of base attitude in the feasible solution space. Finally, an illustrative example is used to verify the feasibility of the algorithm.

基于GA研究机械臂运动对基座的姿态扰动问题，首先，建立空间机器人的运动学模型及空间机器人末端与关节速度之间的映射关系；接着，应用GA作为最优化算法，在空间机器人可行解空间中，寻找最优解得到最优路径，以达到对基座姿态干扰最小的目的；最后，通过数值仿真实验验证算法的实用性。

The theoretical model of uniform droplet spray process had been established in this thesis. The calculation method for theoretical value of jet velocity and optimal frequency had been developed. Therefore the theoretical value and regularity of jet velocity and optimal frequency under different spray pressure were obtained, so the theoretical prediction for spray result had been realized. This not only offers comparison parameter for simulation results, but also will guide the proper determination of process parameters.

本文建立了均匀液滴喷射过程的理论模型，导出了射流速度和最优频率的理论值计算方法，从而得出了不同喷射压强下的射流速度和最优频率的理论值及所存在的规律，实现了对喷射结果的理论预测，不但为模拟结果提供了对比参数，而且对于合理选取工艺参数具有指导意义。

In CRS gather method, we derived the quantitative relationship between optimal three parameter and migration velocity field, and then put forward ray-tracing method to get migration velocity field using optimal three parameter in CRS stack. The applications proved its effectiveness and adaptability.

在CRS道集偏移速度建模中，推导了优化三参数与偏移速度场之间的定量关系，提出了利用CRS叠加中的优化三参数求取偏移速度场的射线追踪法，模型试算表明了方法的有效性和适应性。

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