By some abstract results of operator equation, the fourth order singular boundary value problem was discussed.

利用算子方程的一些抽象结果来讨论四阶奇异边值问题。

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The fourth order Runge-Kutta method is used to transform the mathematics model into discrete simulation model, using MATLAB7.0 simulation software to simulate its dynastic performance.

采用了四阶龙格-库塔算法，将数学模型转换为可仿真的离散模型，并利用MATLAB7.0对其进行了计算机仿真。

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In this paper, the initial-boundary value problem of a kind of nonlinear fourth-order wave equations with damping and source terms is studied on the base of Beam equation.

本文在梁方程的基础上研究了一类具有非线性阻尼项和力源项的四阶波动方程的初边值问题。

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The fact is that government spending is a fourth-order issue in determining our rate of economic growth.

FORBES: Paul Ryan's 'Kamikaze' Budget Is Surgery Without the Anesthesia

Mr. Wheeldon, whose impetus took the ballet from proposal to premiere, heads the program credits, but it is the efforts of set and costume designer Bob Crowley, fourth in order here, that steal the show.

WSJ: Stolen by Design | Alice's Adventures in Wonderland | National Ballet of Canada | By Robert Greskovic

Fourth, the Order significantly tightens restrictions on reclassification of information after its declassification and release under proper authority, particularly with respect to records that are in the legal custody of the National Archives.

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