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- fourth order equation 四阶方程
- The initial boundary value problem of fourth order wave equation with dispersive and dissipative terms is studied. 摘要研究具色散和耗散项的四阶波动方程的初边值问题。
- Use the Trigonometric Function Solutions of Fourth Order Equations to Study the Event Horizon of Non-sphere Symmetric and Non-stationary Black Hole 基于四次方程的三角解研究非球对称动态黑洞的“类视界面”
- It reduces the problem of solving double harmonic equation to the problem of solving the fourth order Euler equation by applying transformation. 这种方法是用变换将解重调和方程问题化简为解四阶欧拉方程问题
- The elastic moduli Eijlm represents a tensor of the fourth order. 弹性模数Eijlm表示一个四阶张量。
- This paper considers the finite difference method for a class of generalized fourth order dispersive and dissipative wave equation. 摘要研究了一类四阶非线性耗散、色散波动方程初边值问题的有限差分解法。
- The general solution of a kind second order equation is given. 摘要给出一类二阶变系数线性微分方程的通解。
- Using the fourth order Runge-Kutta method, the equation of disorderly coupled pendulums with different simple pendulums is calculated. 摘要利用龙格-库塔法求解了不同单摆构成的耦合摆的运动方程，分析了由两个不同质量的小球组合的耦合摆的运动情况；
- Focused on the asymptotic behaviour of mediant for fourth order Lagrange's mean value theorem and obtained the main results as followed (The equation is abbreviated). 摘要对四阶拉格朗日中值定理中间点的渐近性质进行了研究，得到的主要结果是(方程式略)。
- A class of singularly perturbed boundary value problem of weakly nonlinear equation for fourth order on the finite interval with two parameters is considered. 摘要讨论了一四阶具有双参数的弱非线性方程在有限区间上的奇摄动边值问题。
- Concretely,the fourth order squeezing of the light field iis studied in detail. 我们详细研究了量子光场的四阶压缩特性,给出了四阶压缩的条件。
- The micell of block copolymer conjugates releases drugs followed the rule of first order equation and had no burst effect. 键合物胶束体外释药遵从一级动力学，不存在突释现象。
- The chain consists of a dual-mode,highly linear,fourth order Chebyshev active RC filter and three VGA stages. 基带由双模的高线性度的四阶切比雪夫形式的有源RC低通滤波器以及三级可变增益放大器构成。
- The scattering of time-domain pulse by the ionosphere was calculated using a fourth order (FD)2TD scheme. 采用具有四阶精度的时域有限差分法计算了电离层对时域脉冲的散射，然后应用小波变换求出了反射信号的时频分布。
- Results The amount of HPMC and lactose had significant effects on the release of allopurinol.The release behavior of the tablets followed the zero order equation. 结果羟丙基甲基纤维素(HPMC)和乳糖的用量对释药有显著性影响,别嘌醇缓释骨架片的体外释药行为符合零级释放模型。
- On those points of fourth order lead which can not receiver the GPS signal, Leica TC1800 was used and achieved precision requirement. 在无法接收GPS信号的四等导线点按照常规方法利用TC1800测量，达到设计精度要求。
- We also extrapolate the expansion arid enhance the accuracy of the eigenvalue from the second order to the fourth order. 然后对误差展开式外推，收敛阶数可以从二阶提高到四阶，得到了高精度的解。
- Time is sometimes called the fourth dimension. 时间有时被称为第四度空间。
- By companion matrix of polynomial gave one necessary and sufficient conditions of two polynomial having common roots, according to the above gives one method to solute dual higher order equation. 摘要利用多项式的伴侣阵给出两多项式有公共根的一个充要条件，并据此给出解二元高次方程的一种方法。
- With flexible definition of fourth order cumulant of the array output signal, the spectral peak searching is not necessary for the new separable approach. 通过巧妙定义阵列输出四阶累积量矩阵,该方法不需要谱峰搜索就可以估计信号二维到达方向。
