所以速度的符号,和平均加速度的符号,这二者都取决于,这里x正方向,是如何定义的,和0点的选取没有关系。
So the signs in the velocity and the signs in average acceleration depend crucially on how I have defined my increasing value of x not where I choose my zero points.
由于速度极慢，应选取研磨得极细的咖啡粉来萃取。
Due to extremely slow speed, should select a very fine abrasive powder to extract the coffee.
并采用各点点位位移速度图对所建立的函数模型进行验证，同时对状态方程的建立及初始值的选取进行分析总结。
Finally, it validated established model with each point displacement velocity chart, analyzed and summarized the established of state equation and selection of initial value at the same time.
结果表明，滚刀与工件间的相对偏差变化速度的快慢不仅影响到齿轮加工精度，还影响到误差补偿方法的选取。
The result shows that the changing velocity of the errors has influence on the machining accuracy of the gear and the choosing of the compensating methods.
实验结果表明，利用遗传算法可以有效地提高原有图像阈值选取方法的速度。
The results of experiments show that genetic algorithms can greatly improve the speed of original method in selecting image thresholds.
通过计算图像梯度信息，选取边缘区域像素作为控制点，既改善减影图像质量，又提高运算速度。
The quality of the subtraction image was improved and computation time was reduced by selecting edge pixels as triangular control points.
针对浅层地震资料目的层较浅、叠加次数少和城市背景干扰大等特点，文中对速度分析的参数选取问题进行了研究。
Considering the properties of low stack folds, shallow objected layers and big background noise of shallow seismic data, the parameters selection for velocity analysis is studied in the paper.
在本试验参数范围内选取切削参数时，切削速度、进给量取中值有利，切削深度取小值有利。
At the range of the testing parameters it is of advantage to select middle value of feedrate and cutting speed, and smaller value of cutting depth.
结果表明，轴向进给速度的选取对内高压成形三通管具有重要影响。
The simulation result shows that the selection of axial feed velocity has a strong influence on hydroforming tri-branch tube.
该方法根据运动估计的特点，对传统的模拟退火算法初始点的选取、搜索策略等进行了改进，在保证估计精度的前提下，提高了估计速度。
By improving the game of search area changing a nd selection of start point, the method increases the estimation speed, and thus the precision is ensured.
如果选取的权值范围距离目标极值区域很远，搜索空间越大，目标极值区域越窄，搜索时间就越长，训练速度就越缓慢。
If it is far from chosen range of weights to goal area, the search space is wider, goal area is narrower, search time is longer and training speed is slower.
我们首先分析两种材料的加工特性，又从丝锥材料、切削速度、 切削液三方面说明了对不锈钢和钛合金材料攻丝加工时的影响和选取方法。
Stock removing velocity and cutting fluid on the tapping for the materials have been studied in the paper, and thus reasonable tapping conditions for practical working could be selected.
通过合理选取初始步长、动态调整搜索步长等策略来加快求解速度。
The solving process is accelerated by the strategies such as reasonable choice of the initial step length, dynamic adjustment of the search step length.
该算法的突出优点是与初始值选取无关、计算量小、具有整体收敛性、并具有较高的收敛速度。
The most important advantage of this algorithm is the property of independent initial value, small amount of calculations, the global convergency and higher convergence speed.
为了推断中子慢化剂液氢中气化氢气泡的上升速度及影响因素，选取合适的工质进行了含气率的模拟实验。
To predict the rising velocity of hydrogen gas and the influencing factors, a suitable working fluid was determined for experimental simulation on the vold fraction of hydrogen in a neutron moderator.
经过神经网络的测试表明，该算法在收敛速度和精度上都优于原始算法，并且参数选取灵活，容易实现。
The testing results by neural network show that this algorithm is better than original PSO in convergent speed and accuracy, and its parameter selection is flexible and easily realized.
当图象的轮廓被提取出来后，插值核的选取要考虑到计算速度和数学精度的要求。
We need to de- sign an interpolation kernel to obtain an acceptable result of reconstruction both in terms of computational speed and mathematical precision.
因此距离-速度的二维可检测区图才是衡量重频选取好坏的重要标准。
So the map of range-velocity detectable zone is in fact the criterion of evaluating the quality of the selected PRF set.
与目前国际上关于可见性处理的方法相比，新方法对可见面的选取具有很高的精度，速度很快，并且能够方便地处理带有动态物体的场景。
Compared with existing methods for selecting visible surfaces, the new method is fast and in high precision, and can conveniently handle the scenes with dynamic objects.
在颗粒受力分析及沉降末速计算基础上，首先选取了沉降速度模型，进而对脉动干扰沉降理论做了初步探讨。
With analysis of forces on particle and calculation of terminal velocities, terminal velocity models are selected, and then Pulse jamming settlement theory was discussed.
在满足加工精度要求的前提下选取加工速度最大的工艺参数组合。
So we can chouse the fast speed combination that under the control of machining precision.
虚速度剖面制作质量的好坏主要取决于提取子波时测井约束的效果、水平叠加偏移剖面的质量、叠加速度的选取和平滑作用以及各处理参数的选择。
The quality of psedu-velocity depends on the result of log-constraining when wavelet was obtained, the quality of original stacking migration section and the selection of all processing parameters.
在对原模型进行结构网格划分后，通过数值模拟，分析了不同设计方案下叶轮内的压力、湍动能、速度分布，并预测了外特性，选取一个最优方案进行试验。
The distributions of pressure, turbulence kinetic energy, velocity in three impellers were predicted with the commercial CFX. One impeller was selected as optimal schemes and produced for experiments.
通过理论分析，适当选取控制参数不仅不影响收敛速度，有时还会加快收敛。
Through theoretical analysis, the proper choice of the controlling parameter not only has no influence on the rate of convergence, but also accelerates the convergence sometimes.
介绍了速度信号滤波器硬件电路的设计，分析了其工作原理、响应特性和参数选取原则等，给出了微机控制中速度信号处理的软件实现方法。
The working principle, response characteristics and parameter selection rules, etc. are analysed. The software realizing method for speed signal processing in computer control is given out.
压片时转盘的速度、物料的充填深度、压片厚度均可调节，还可以选取片看样。
Rotary speed and pressure for depth of the filling material and thickness of the tablets can be adjusted, still can choose piece look samples.
对几类测量加速度的微机械式加速度传感器进行了讨论，并针对每种类别分别选取一种典型的结构，分析了内部的工作原理。
This paper describes several kinds of micro-mechanical acceleration sensors used to measure acceleration, and analyses the internal working principles of these typical structures from each category.
在求解非凸规划的分枝定界法中，剖分区间的选取直接影响到整个算法的收敛速度。
In the branch and bound method for solving non-convex programming, the choice of region subdivision directly affects the convergence of the whole algorithm.
分析了地震加速度时程模拟的常规方法，指出初始加速度时程的选取十分重要。
The normal method to simulate earthquake acceleration time history is analyzed, and it is shown clearly that choice of initial acceleration time history is important.
分析了地震加速度时程模拟的常规方法，指出初始加速度时程的选取十分重要。
The normal method to simulate earthquake acceleration time history is analyzed, and it is shown clearly that choice of initial acceleration time history is important.
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