
lagrangian
词源
Named after Joseph-Louis Lagrange (1736-1813), an Italian-French mathematician and astronomer who made significant contributions to classical mechanics.
noun
❶ 拉格朗日量,是物理学中描述系统动力学特性的函数,尤其在分析力学中用于推导运动方程。
“The Lagrangian of a system is defined as the difference between its kinetic and potential energy.”
(系统的拉格朗日量定义为动能与势能之差。)
“In classical mechanics, the Lagrangian formalism provides an alternative to Newton's laws.”
(在经典力学中,拉格朗日形式为牛顿定律提供了一种替代方法。)
❶ 拉格朗日点,指两个大质量天体之间的引力平衡点,常用于航天器定位。
“The James Webb Space Telescope is positioned at the L2 Lagrangian point.”
(詹姆斯·韦伯太空望远镜位于L2拉格朗日点。)
“Lagrangian points are ideal locations for space observatories.”
(拉格朗日点是太空观测站的理想位置。)
常见短语
Lagrangian mechanics — 拉格朗日力学,一种基于能量而非力的力学分析方法,适用于复杂系统。
“Lagrangian mechanics is particularly useful for systems with constraints.”
(拉格朗日力学特别适用于有约束的系统。)
Lagrangian density — 拉格朗日密度,连续介质力学和场论中描述系统每单位体积的拉格朗日量。
“The Lagrangian density is fundamental in quantum field theory.”
(拉格朗日密度在量子场论中非常重要。)