Based on the above, the impact of amplitude coefficient ratio on amplitude-phase Double Differential Space-Time Codes is discussed, and an optimal selection scheme in amplitude coefficient is given.
在此基础上，讨论了幅度系数比对幅度相位双差分空时码的影响，并给出了一种最佳的幅度系数选择方案。
The selection of technical scheme one of is the keys to optimal drilling in the whole drilling ope-ration.
在优化钻进中，技术方案的选择，是整个钻进过程的关键之一。
Aiming at the complexity and the uncertainty of optimal selection of landslide treatment scheme, taking the geological data, execution conditions, engineering economy, environmental influence and etc.
针对滑坡治理方案优化选择的复杂性及不确定性，充分考虑地质资料、施工条件、工程经济及环境影响等综合因素，构造多目标优选模型。
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