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=== 一个其内能有已知表达式(其扩展状态变量的函数)的系统的表述Statement for a system that has a known expression of its internal energy as a function of its extensive state variables===
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=== 一个其内能有已知表达式(其扩展状态变量的函数)的系统的表述 Statement for a system that has a known expression of its internal energy as a function of its extensive state variables===
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写成广泛性质(质量,体积,熵……)的函数时,第二定律等价于弱凸函数内能 U。<ref>{{cite book |last1=van Gool |first1=W. |last2=Bruggink |first2=J.J.C. (Eds) |url= |title=Energy and time in the economic and physical sciences |publisher=North-Holland |year=1985 |pages=41–56 |quote= |isbn=978-0-444-87748-2}}</ref><ref>{{Cite journal | last1 = Grubbström | first1 = Robert W. | doi = 10.1016/j.apenergy.2007.01.003 | title = An Attempt to Introduce Dynamics Into Generalised Exergy Considerations| journal = Applied Energy| volume = 84| issue = 7–8 | pages = 701–718 | year = 2007}}</ref>
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'''<font color="#32CD32">写成广泛性质(质量,体积,熵……)的函数时,第二定律被证明等价于弱凸函数内能 U。The second law has been shown to be equivalent to the internal energy U being a weakly convex function, when written as a function of extensive properties (mass, volume, entropy, ...).</font>'''<ref>{{cite book |last1=van Gool |first1=W. |last2=Bruggink |first2=J.J.C. (Eds) |url= |title=Energy and time in the economic and physical sciences |publisher=North-Holland |year=1985 |pages=41–56 |quote= |isbn=978-0-444-87748-2}}</ref><ref>{{Cite journal | last1 = Grubbström | first1 = Robert W. | doi = 10.1016/j.apenergy.2007.01.003 | title = An Attempt to Introduce Dynamics Into Generalised Exergy Considerations| journal = Applied Energy| volume = 84| issue = 7–8 | pages = 701–718 | year = 2007}}</ref>
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