Some end value condition derived by variational method in accordance with the least energy loss principle and their mechanical background are also dealt with.
同时从能量最小原理出发，用变分的方法推导出几种端值条件，说明它们的力学背景。
Therefore, the natural gas energy measurement method research has important realistic significance and certain practical value.
因此，天然气的能量测定方法研究具有重要的现实意义和一定的实用价值。
On basis of energy random analysis theory for derailment, a new method is presented with which the limit value of bridge lateral rigidity for preventing derailment can be established.
本文以列车脱轨能量随机分析理论为基础，提出了制定预防列车脱轨的桥梁横向刚度限值的新方法。
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