The performance of HF data transmission systems is badly constrained by the HF channels what are characterized by the rapid time variation and dispersion.

高频信道的变参性以及时间弥散特性严重影响短波数据传输的性能。

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The Es4 member in Wangxie 119 area is a typical area where lateral reservoir variation is successfully predicted with logging-constrained inversion technology in recent years.

王斜119地区沙四段为近几年来成功地利用测井约束反演技术进行储层横向预测的典型区块。

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But, crucially, this variation is constrained.

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But variation is often constrained by the fundamental mechanisms of development.

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