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1·Perturbation calculation in reactor physics requires the neutron adjoint eigenvalue equation.

在反应堆物理计算中，扰动计算需要中子本征值方程的共轭方程。

2·A new method for solving the boundary condition eigenvalue equation of the corrugated system is given.

本文对波纹喇叭的边界条件特征方程的解提出了新的简便方法。

3·The eigenvalue equation and approximate formula for cut-off frequencies of guided modes are obtained by vector-field-method.

采用矢量场法，得到了在弱导条件下传导模式的特征方程和截止频率的近似计算公式。

4·Finally a displacement generalized eigenvalue equation is obtained, in which the stiffness matrix is symmetric and positively definite.

最后得到一个矩阵型的位移广义本征值方程，刚度矩阵对称、正定。

5·In this paper, the rationality of the multigroup approximation of the control critical eigenvalue equation for the slab geometry is studied.

研究了板几何控制临界本征方程多群逼近的合理性。

6·In this paper the cut-off frequencies of modes of waveguides are calculated via given eigenvalue equation. The results show good agreement with those from other sources.

文中通过所建立的本征方程对波导中各模式的截止频率进行了求解，数值结果与已有结果符合良好。

7·The presented method selects only one cyclic symmetric sector of the structure as the finite element calculating model and establishes the complex constrained eigenvalue equation of the sector.

选取结构的任一个循环对称扇区作为有限元计算模型，建立单个扇区复约束特征值方程；

8·And the eigenvalue problem of integral equation is transformed into a standard eigenvalue problem of a matrix with infinite order.

进而将积分方程形式的特征值问题转化为无穷阶矩阵的标准特征值问题。

9·And then the eigenvalue problem of integral equation is transformed into the standard eigenvalue problem of a positive definite matrix with infinite order.

进而将积分方程形式的特征值问题转化为无穷阶正定对称矩阵的标准特征值问题。

10·Then the eigenvalue problem of free vibration of annular sector plates is transformed into the eigenvalue problem of integral equation by using superposition theorem.

然后由叠加原理将环扇形板的自由振动问题转化为积分方程特征值问题；