In modern physics research, the calculus of variations has a broad application of law. As a solid mechanics, structural mechanics and computational mechanics of the theoretical foundation, it has important value in theory and practice on the mechanics; Variation method ruled out the perturbation of the restrictions can be widely used in many state-level and the state function in the calculation in the optical; Calculus of variations can be calculated with the parameters, we can guarantee the reliability of the results, can effectively reduce the workload of calculation, It can be said that the applications of calculus of variations are very broad.

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The entire flight process is the rocket's flight mechanics and celestial mechanics of the process, and sometimes is a typical rocket flight mechanics problems, and sometimes is a typical celestial mechanics problems.

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His research on mechanics deals with elastic mechanics, photo-elasticity, structural mechanics, visco-elastic mechanics, celestial mechanics, fluid mechanics, and dynamic stability.

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Mechanics has two main branches,Lagrangian mechanics and Hamiltonianmechanics:Lagrangian mechanics is based on variational principles and Hamil-tonian mechanics is based on symplectic structure of cotangent space.

力學(xué)有兩大主要分支：基于變分原理的Lagrangian力學(xué)和基于余切空間的辛結(jié)構(gòu)的Hamiltonian力學(xué)五月天激情综合网。

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At the same time, we look to have as few 'gamey' mechanics as possible and aim to adhere as close as possible to design philosophy and game limitations set down by Paradox and BL-Logic themselves for the original game.

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