time of validity

This chapter firstly demonstrates what is Ex Post Facto, then introduces the validity of the Criminal law and Judicial decisions in terms of Time.

本章首先介绍了事后法的具体表现形式，然后介绍了制定法和司法判决的不同时间效力形式。

This method uses wavelet packet decomposing the WVD of the signal and reconstructing the time frequency diagram according to the decomposition coefficient. It can remove cross-term efficiently. Theoretical analysis and experimental results proved the validity of the method.

基于小波包分析，利用小波包对信号的威格纳时频分布进行分解，并利用分解系数重构时频图，使交叉项得到抑制和改善，实验结果表明此方法简单有效。

Put forward the technology that locating the defects with spherical surface freewill triangle, estimating the validity of located points with the method of projection the first time.

首次提出球面任意三角形定位，投影判断定位点有效性的定位方法。

Validity of Dynamic MELD Score in Predicting Time of Liver Transplantation in Patients with Chronic Severe Hepatitis B

动态MELD值对慢性乙型重型肝炎患者肝移植时机的预测作用

The Bayes method is used to carry out the analysis of consumer's risk β in the mean time between failures ( MTBF) assurance test. Numerical examples are pro-vided to demonstrate the validity of the analysis.

采用Bayes方法，进行MTBF保证试验中的使用方风险β的分析，并给出算例，证明分析的有效性。