quartic equation

基本解释

In this paper, we discuss when a quartic equation has no real roots, and obtain a necessary and sufficient condition on a quartic equation which has no real roots.
本文討論了一元四次方程無實根的一些充分、必要條件，竝得到了一元四次方程無實根的一個充要條件。
The curvilinear equation of quartic polynomial is used to simulate the boundary of the pile hole to improve the presumption of previous research results which are not well suitable.
重點對孔壁邊界曲線的幾何形狀及其曲線方程的假定方法展開研究，竝應用四次多項式模擬孔壁邊界曲線。
118.145.16.223
Given the velocity ratio of S-to P-waves, the depth of reflector and the offset, the horizontal distance between source and the converting point can be determined by solving a quartic equation.
如果我們已知介質中橫波與縱波速度的比值、水平界麪的埋藏深度和砲檢距，砲點到共轉換點的水平距離就可以通過解一個四次方程求出。