本文以偏硼酸钡晶体为例，分析了三个光波的二阶非线性相互作用，并推导单轴晶体的有效非线性系数的表达式。
The second order nonlinear optical effects on the three-wave is analyzed, and the nonlinear optical coefficient of the uniaxial crystal is deduced from an example of the BBO.
有效长度系数对于这种连接的设计起关键作用。
The effective length factor for the compression design of the cleat is considered.
由这种有效相互作用所求得的被吸附量子气体的第二维里系数及其二阶导数，比由理想二维物理模型出发所得结果更接近实验数据。
The second virial coefficients and its second derivatives calculated from this effective potential agree with the experimental data much better than that calculated from the ideal 2-dimension model.
它能根据规则实时调整顺馈系数，使得微分顺馈作用尽可能补偿速度误差信号，提高跟踪精度，仿真结果表明，这种微分顺馈系数的实时自整定是有效的。
The adaptive adjustment of this kind of compensator makes it possible to reduce velocity error, and improve tracking performance. The simulation examples have shown its effectiveness.
该杀虫剂以阿维菌素和毒死蜱为有效成分加工而成的新型复配杀虫剂，经共毒系数生测证明具有显著增效作用。
The insecticide chlorpyrifos to abamectin and processed for the new active ingredient mixture of pesticides, bioassay by co-toxicity coefficient proved significant synergies.
该杀虫剂以阿维菌素和毒死蜱为有效成分加工而成的新型复配杀虫剂，经共毒系数生测证明具有显著增效作用。
The insecticide chlorpyrifos to abamectin and processed for the new active ingredient mixture of pesticides, bioassay by co-toxicity coefficient proved significant synergies.
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