The approximate solutions by energy methods and numerical methods are traditional.

多年来，对于这种板只有能量法与数值解法的近似解。

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Exact and approximate methods, energy methods, principle of virtual work, introduction to computational structural mechanics.

精确解法及近似解法，能量法，虚功法。结构计算力学绪论。

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Compared all kinds of two-dimension limit equilibrium methods and two-dimension the Principle of Minimum Potential Energy methods.

比较了各种二维极限平衡方法和二维最小势能方法。

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The latest suggestion is that we should cut taxes on energy at just the same time as we are trying to get everyone to use less energy and substitute with insulation and other, non energy consuming, methods of keeping warm.

FORBES: Let's Cut Energy Taxes to Beat Climate Change!

As with many other energy production and storage methods, only time and market forces will determine how far the petrol-from-air idea can go.

BBC: Petrol from air: Will it make a difference?

That means someone installing the smart wiring in the walls of buildings, the network firm providing the platform connecting the smart devices, the gadget-makers that provide an Apple-like user experience for every fixture, and the next-generation utility offering new forms or methods of energy delivery.

FORBES: Going Green: Investing In Consumer Focused Energy Tech