优选

A series of ultrajets are developed, such as 1MD3 perforating gun, inner blind hole perforating gun, unconfined perforating gun, and so on. A series of efficient perforating technology are also optimized and assembled, such as recombination perforating, orientable perforating, tubing conveyed perforating and production string combination operation technology, and so on.

结合大庆油田薄差层的地质特征，开发出了1MD3射孔器、内盲孔射孔器、无围压射孔器等高效射孔器，同时优选配套了包括一体复合射孔工艺技术、定方位射孔工艺技术、选发射孔工艺技术等系列高效射孔工艺技术。

The extraction conditions were optimized by orthogonal test on the basis of single factor test.

在单因素试验的基础上通过正交试验优选出最佳微波辅助提取工艺条件为微波萃取剂40%乙醇溶液、微波辐射时间50s、提取时间50min、提取温度70℃。

Some factors influencing dry-shrinkage factor and hulking factor of CRC plate and the corresponding levels were studied, and some key factors and influencing laws were found through orthogonal experiment. The influence sequence of these key factors and relationship with dry-shrinkage and hulking performance were presented by theoretical analysis.

通过正交试验，对影响GRC平板干缩性能和湿胀性能的诸多因素及其水平进行了优选，分别找出了影响显著的主要因素及其影响规律和机理，通过计算分析，给出各影响因素的主次顺序，计算出干缩性能和湿胀性能与诸因素水平之间的关系。

But at present everything has changed just like the decrease of periodic the OSR and periodic output.

但在目前阶段，周期产量下降，周期油汽比降低，原有的注汽参数不再适应目前的生产现状，因此依据目前生产动态重新进行分析、优选。

However, in practice, it is preferable that the acoustic drivers overlap in a top view.

但是，在实际中，优选的是在俯视图中声学驱动器重叠。

For example, in colder soils of the American corn belt and drier areas of the Argentine pampas, banding is the preferred method for phosphate fertilization.

如在美国"玉米带"的寒冷地区和阿根廷的干旱热带草原地区，条施是磷肥施用的优选方法。

In a preferred embodiment, the elongated support member is a planar parallelepiped.

在一个优选实施例中，长形的支撑构件是一个平面平行六面体。

In a further preferred embodiment, the elongated support member is a parallelepiped with an axially extended slot, in which the optical fiber is secured with its longitudinal axis substantially parallel to the axially extended slot.

在进一步优选的实施例中，长形的支撑构件是一个具有轴向延长槽的平面平行六面体，其中光纤安装在与轴向延长槽充分平行的纵轴上。

Some improvement of genetic algorithm is presented. Fuzzy evaluation is applied to parataxis choosing genetic algorithm to get better solution which satisfied both integral demand and individual demand of object functions.

把多准则模糊优选理论应用于并列选择遗传算法，从而得到即满足整体的最优性，又尽可能的逼近各子目标最优值的非劣解。

Finally, it makes a discussion and draws a conclusion that the multiple regression model which is set up through selecting the complications of influencing gas emission with partial regression square sum parameter is feasible , at the same time, it plays a role in improving the accuracy of fitting prediction ,and it could be better for forecasting and controlling the gas emission in the coal mine.

最后，通过分析，得出结论：采用偏回归平方和参数对该矿瓦斯涌出量影响因素进行优选建立回归模型是可行的，同时有利于提高拟合精度，可以更好地对该矿瓦斯涌出量进行预报与控制。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。