反向运动

机械运动仿真中的反向运动设计

Inverse kinematics design in emulations of mechanical motion

其特点是投影采集过程中X射线源与探测器做同步反向运动，只需要在有限角度下取少量投影即可回顾性地重建出物体任意断层的图像。

The characteristic of this technique is the X-ray source and detector moving synchronously during projection acquisition and it can reconstruct an arbitrary slice from several projections in limited angle .

国债价格确实上涨了，与国债价格反向运动的国债收益率跌至历史低位，但标普500股票指数（Standard&Poor's500-stockindex）今年至今也已上涨近14%，高收益“垃圾债券”的回报率接近10%。

Treasury prices did indeed rise , while their yields , which move in the opposite direction , fell to record lows . But the Standard & Poor 's 500-stock index has gained nearly 14 % so far this year , while high-yield ' junk ' bonds have returned nearly 10 % .

通过分析运动补偿时间滤波（MCTF）更新算法对重构图像PSNR的影响，研究了一种内容自适应的MCTF反向运动补偿算法。

On basis of the impact on reconstruct image PSNR , brought by update step in motion compensation temporal filtering ( MCTF ), a content adaptive invert motion compensation ( IMC ) algorithm is proposed .

模拟中板材卸载过程采用模具反向运动方法。

Sheet unloading process is simulated by the tools ' reverse motion .

然后停下来，再反向运动。

And stopped dead in its tracks and turned around .

利用振子的三阶和五阶弯曲模态工作，可实现直线超声电机的正反向运动。

Linear movements back and forth are realized using flexural modes of B_3 and B_5 respectively .

实证分析结果表明，在此期间货币流通速度的变化方向与货币政策方向反向运动。

After Empirical analysis shows that , the shifting direction of velocity of money is opposite to the direction of monetary policy .

仿真实验表明，所提出的摩擦补偿方法简单易用，可以有效地改善系统极低速和速度反向运动区域的定位精度和速度跟踪性能。

Simulation results show that the precise position control and velocity tracking performance can be improved effectively at extremely low velocity or at velocity reversal .

实验验证了这种双向驻波直线电动机具有结构和驱动简单、高分辨率、可方便地实现正反向运动等特点。

Bi-directional standing wave linearly motor has many advantages , such as simply structure and driving , high spatial resolution and realizing movement in two direction .

提出一种新的圆弧插补中反向运动间隙补偿的方案，可提高加工圆弧时的表面质量，并使补偿过程中产生的误差较小。

A new reverse movement backlash compensation way is put forward , which can improve surface quality for machining arc , and make the error produced in compensation low .

我们可以根据室壁运动的减弱、运动消失与反向运动等来明确缺血或梗死部位。

The abate , motion that we can move according to room wall disappears wait to will be short of blood clearly or straighten with retrorse motion dead place .

如何理解这种充满悖论性的反向运动？在这种悖论性之下隐藏着怎样的悲剧性内涵？这是本文论述的一个重要方面。

How to understand such a paradoxical reversal ? What tragic connotation is implied in this paradox ? This is one of the most important aspects of this paper .

同时，农村社会也在对市场化作着反向运动，众多因素可能导致宅基地市场化可能难以继续推进。

Meanwhile , the rural community is also turned into a reverse movement of the market . Many factors could cause that homestead may be difficult to continue to promote market-oriented .

把生猪价格变异率和产量变异率置于同一坐标中，以分析二者之间的依存关系，可以看出二者在总体上有近似反向运动的倾向，这对以往研究是个有益的补充。

Put the ratio of variation of price and output into the same coordinates to analyze the interdependence between the two , similar reversal change trend in general can be seen .

本文对非对称型液压缸伺服系统的静动特性作了系统的研究，分析了正反向运动的速度比，找出了最小刚度，导出了传递函数。

The static and dynamic characteristics of asymmetric hydraulic cylinder servo systems are discussed . The speed ratio of positive and reverse motions is analysed , mini-stiffness and transfer functions are deduced .

实验结果表明，所提出的摩擦补偿模型有效地改善了系统极低速和速度反向运动区域的控制性能。

Using the transition time the friction can be well compensated and the experimental results show that the system performance can be improved effectively using the proposed model at low velocity and countermove .

最后，作为在更成熟的自适应控制得到应用前的一种过渡，引入了模糊增益补偿控制，主要用于解决系统性能在正、反向运动时不一致的问题。

Finally , as a simpler solvent before more sophisticated adaptive control arithmetic put into use , the paper introduces Fuzzy Gain Compensation to solve the problem of non-consistent behavior in different direction .

阐述所谓自由经济秩序是帝国主义霸权的工具，而国家主义经济学理论和实践是针对自由秩序说教的反向运动。

It elaborates in this part that the so-called free economic order is just the tool made use of by imperialist hegemonists , while the economics theories and practices of nationalism go opposite from free order preaching .

随着社会、经济条件的变化，民法也在不断地向前发展，有学者将这种发展趋势归纳为所谓从身份到契约的反向运动&从契约到身份。

With the development of the condition of society and economy , civil law is progressing . Some scholars call this trend " from contract to degree " which is reverse movement of " from degree to contract " .

首先，一对完全相同的转子是凸轮泵的核心零件，两转子在泵腔内做持续的同步反向旋转运动，使介质吸入到泵腔中加压后排出。

The twin rotors make constantly synchronized reverse rotary motion in the pump chamber and the medium is sucked into the pump chamber . Then the medium is ejected pressurized .

正常鱼原始鱼体方向反向时对运动纲索的转向率显著地大于同向时的转向率，但盲鱼转向率在原始鱼体方向间差异不显著。

The original body direction of the normal fish has evident effect on its direction changing and rope-passing rates .