逆的

Second,. according to the sector of voltage space vectors, adjacent switching state vectors are selected to calculate on-durations under volt-second balance principle. The questions of judging sectors and sector transition are discussed and qualitative analysis of performance is carried out.

由三相电压源型逆变器输出电压波形得到六个有效开关状态矢量，这六个开关矢量和两个零矢量合成一组等幅不同相的电压空间矢量，去逼近圆形旋转磁场。

Through the method, the tensile control value, values of stress, displacements, coordinates and so on can be obtained.

通过算例验证了逆分析方法的有效性。

Use a check valve or trap in the discharge line to prevent hazardous back flow into the system.

输气时应使用逆止阀或阻火器，以防止回流进入气瓶的危险。

Use a check valve or trap in the discharge line to prevent hazardous back flow into the

输气时应使用逆止阀或阻火器，以防止回流进入气瓶的危险。

Employing the inverse perturbation method , we have tackled the problem of optimum design of the machine tool spindle.

用逆摄动法进行机床主轴的动力优化设计。

The earthquake occurred as the result of motion on a northeast striking reverse fault or thrust fault on the northwestern margin of the Sichuan Basin.

此次地震是四川盆地东北部逆向断层发生碰撞或西北部边缘地区逆冲断层作用的结果。

The paper also based on mechanics of fracture, rock mechanics, mechanics of materials, sort the rock failure and spread into four models, and the model of the thrust spread of fault is firstly advanced.

文章同时基于断裂力学、岩石力学以及材料力学理论，将岩石破裂扩展概括为四种主要模式，并首次提出了断层的逆冲破裂扩展模式。

The thrust fault throws are not approximate, which have a 1000m-2000m differences such as Zizhen and Yangxin faults.

结果发现逆冲断层之间具有波动性特征，他们断距并不相近，有的有1000m—2000m的差距，例如滋镇断层和阳信断层。

Each connected account, for which there are open counter positions, is represented as a table line.

各个被连接的帐户，有开放逆位置，代表作为桌线。

Focal mechanism solutions of 4 events, for which required parameters are available, indicate left lateral strike slip faulting for 3 events and thrusting for one event.

结果表明，有 3次地震是左旋走滑断层活动，另一次地震是逆断层活动。地震震源机制解的P轴方向为NW SE和NE SW 。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。