不动性

It is found out that the different titling directions of moving mirror affect the system error independently, at the same time they can be added. The original phase of the interferogram is changed slowly or rapidly with the optical path difference changed, and the phase error is different too.

在动镜的运动中，左右方向的倾斜和俯仰方向的倾斜对系统的影响彼此具有独立性，又具有叠加性；干涉图中初相位因子随光程差改变缓慢变化或快速变化，对相位误差的影响也不全相同。

In addition, performances of uncertain systems with parameter random perturbation are discussed.

讨论系统H〓熵的信息论涵义，寻求基于概率描述的信息论方法与以系统鲁棒性为设计目标的H〓控制方法之间的联系，并以信息论的视角考察参数随机摄动不确定系统的控制性能，为以信息论的手段分析和设计控制系统探索了新的途径。

A very fun Puzzle game, Game category box belong to extinction, but extinction is different from the general box, which required moving more brains you do, pay attention to the parity of the same box.

一款非常好玩的益智游戏，属于消方块类游戏，但又不同于一般的消方块，这需要你动更多的脑筋才行，注意相同方块的奇偶性。

A very fun puzzle games, a Consumers box game, but unlike the general Consumers box, you need to move more of their brains才行, pay attention to the parity of the same box.

一款非常好玩的益智游戏，属于消方块类游戏，但又不同于一般的消方块，这需要你动更多的脑筋才行，注意相同方块的奇偶性。

A proper k total colouring of a graph G is a colouring to its vertices and edges using k colours such that no two adjacent or incident elements of G may be assigned the same colour.

利用梯度投影与罚函数相结合的技巧，将带不等式和等式约束的优化问题化成一个无约束问题，提出了初始点可任意的求解不等式、等式约束优化问题的摄动梯度投影算法；参数δk取不同的数还可以得到一类梯度投影算法，从而得出了在搜索方向和步长不精确条件下的梯度投影法，保证了在实际应用中更容易实现；在较弱条件下，证明了该算法的全局收敛性。

It is advisable that live-loaded bonnets be checked for bolt torque at operating pressure, no future tightening of gasket bolting will be necessary, unless the valve has been dismantled, in which case, the gasket bolts must be torqued to appropriate values and bolt tightness rechecked after operating test pressure and temperature has been achieved.

可以在工作压力下检查动负载阀帽的螺栓扭矩，除非阀门被拆卸，否则不需要对垫圈螺栓进行紧固。在这种情况下，垫圈螺栓扭矩必须保持适当，在达到工作试验压力和温度后，应该重新检查螺栓的紧固性。

But because there is not the pulse flash butt welding craft, it is difficult to weld the rail U75V.

由于历史原因，这些焊机都不具有脉动闪光焊工艺，难以焊接U75V这类焊接性较差的钢轨。

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。