foliage 发表于 2025-3-23 11:18:24

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Mundane 发表于 2025-3-23 17:17:20

Competition vs Cooperation, 1919–22The following very simple example has to demonstrate that force-fields are possible(in an at least two-dimensional space)which are not potential force-fields, but which become potential fields if a restriction is satisfied.

acetylcholine 发表于 2025-3-23 20:25:57

Finance and Strategy Inside ChinaUnder this headline a problem of the theory of deflected beams will be solved by means of dummy loads and dummy displacements.

生来 发表于 2025-3-23 22:27:08

Finance and Technological ChangeGiven a closed curve in space which can be projected on at least one plane in such a way that the projection line is a simply closed curve. Find out the surface to which this curve in space is the boundary and which has a minimal area. (cf. Fig. 6. 1–1).

轮流 发表于 2025-3-24 03:05:09

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forthy 发表于 2025-3-24 10:16:08

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unstable-angina 发表于 2025-3-24 11:47:32

On Climate Change and Institutions,In this chapter, the method of harmonic balance will be applied to two relatively simple problems of nonlinear vibrations.

Antecedent 发表于 2025-3-24 16:48:46

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掺和 发表于 2025-3-24 22:35:26

Evaluation Criteria for Investment DecisionsWe want to deliver a plate theory starting from the basic inequality ..

CLAY 发表于 2025-3-25 00:51:37

https://doi.org/10.1057/9780230235755One problem of viscous flow will illustrate how we can reach upper and lower bounds in hydrodynamics.
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查看完整版本: Titlebook: Examples to Extremum and Variational Principles in Mechanics; Course Held at the D Dieter Besdo Book 1970 Springer-Verlag Wien 1970 Extremu