To improve the technique, both the values of parameters in physical model of electromigration and the statistic distribution property of the parameters are needed.
要改进该技术，不仅需要确定可靠性物理模型参数，而且要求掌握参数的统计分布特性。
Quantum cryptography, which is based on fundamental physical principles, has been proved to be an effective technique for secure key distribution.
基于量子物理原理的量子密码术已被证明是保密信中密钥安全分配的有效手段。
Quantum cryptography, which is based on fundamental physical principles, has been proved to be an effective technique for secure key distribution.
基于量子物理原理的量子密码术已被证明是保密信中密钥安全分配的有效手段。
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