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单词 Conservation of probability
释义

Conservation of probability

中文百科

连续性方程序 Continuity equation

(重定向自Conservation of probability)
Illustration of how the flux j of a quantity q passes through an open surface S. (dS is differential vector area).

在物理学里,连续性方程序continuity equation)乃是描述守恒量传输行为的偏微分方程序。由于在各自适当条件下,质量、能量、动量、电荷等等,都是守恒量,很多种传输行为都可以用连续性方程序来描述。

连续性方程序乃是定域性的守恒定律方程序。与全域性的守恒定律相比,这种守恒定律比较强版。在本条目内的所有关于连续性方程序的范例都表达同样的点子──在任意区域内某种守恒量总量的改变,等于从边界进入或离去的数量;守恒量不能够增加或减少,只能够从某一个位置迁移到另外一个位置。

每一种连续性方程序都可以以积分形式表达(使用通量积分),描述任意有限区域内的守恒量;也可以以微分形式表达(使用散度算符),描述任意位置的守恒量。应用散度定理,可以从微分形式推导出积分形式,反之亦然。

英语百科

Continuity equation 连续性方程式

(重定向自Conservation of probability)
Illustration of how the flux j of a quantity q passes through an open surface S. (dS is differential vector area).
In the integral form of the continuity equation, S is any imaginary closed surface that fully encloses a volume V, like any of the surfaces on the left. S can not be a surface with boundaries, like those on the right. (Surfaces are blue, boundaries are red.)

A continuity equation in physics is an equation that describes the transport of some quantity. It is particularly simple and particularly powerful when applied to a conserved quantity, but it can be generalized to apply to any extensive quantity. Since mass, energy, momentum, electric charge and other natural quantities are conserved under their respective appropriate conditions, a variety of physical phenomena may be described using continuity equations.

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更新时间:2025/6/19 12:34:58