查询词典 iteration

On this basis,we explain how QR iteration converges to a block upper triangular matrix,and then state briefly the relationship between QR algorithm and simultaneous iteration.

在此基础上，我们阐明了QR迭代是如何收敛于块上三角阵的，并简明地说明了QR算法与同时迭代之间的关系。

In orderto improve the complex subspace iteration method for solving undamped gyroscopiceigenvalue problems, we apply the special properties of undamped gyroscopiceigenvalues to it, so we propose double inverse iteration method and double subspaceiteration method.

为了利用无阻尼陀螺特征值的特殊性质，我们进一步讨论了复子空间迭代法在无阻尼陀螺特征值问题中的应用，并给出了双逆迭代算法和双子空间迭代算法。

Schur-Rayleigh-Ritz accelerated subspace iteration method: Schur-Rayleigh-Ritz accelerated subspace iteration method was applied to the gyroscopic eigenvalue problem.

2Schur-Rayleigh-Ritz加速的子空间迭代法将Schur-Rayleigh-Ritz加速的子空间迭代法应用于陀螺特征值问题。

The relationships between the eigenvalues of Jacobi iteration matrix and the block AOR iteration matrix make a very important role in our analysis. Then we prove some sufficient conditions for the semiconvergence of the block AOR method.

利用块AOR迭代矩阵和相应的块Jacobi迭代矩阵的特征值之间所存在的关系，我们证明了求解奇异p-循环线性方程组的块AOR迭代法半收敛的一些充分件。

The reconstruction problem is ill-posed, so two optimal criterions, the least module and the smoothness criterion base on Tikhonov regularization technique, are introduced into reconstruction algorithm. Many regularization parameters choice strategies are investigated, and the TPA(Two—Parameter Algorithm) strategy which is based on the Morozov discrepancy principles, is implemented in two regularization reconstruction algorithms.Numerical experiment results show that the nonnegative and smoothness constraint condition can overcome the difficulty of iteration semiconvergent, preconditioned technique can improve convergence rate and reconstruction accuracy, smoothness regularization criterion can meliorate ill-posed problem of reconstruction and enhance iteration stability, and the TPA is an effective strategy of regularization parameters choice.

数值试验表明：在共轭梯度法中引入非负约束和光滑约束改善了迭代的&半收敛&性，非负约束保证了解的非负性，光滑约束抑制了重建解的振荡现象，约束算法的重建精度与无约束算法相比大幅度提高；在约束共轭梯度重建算法中引入预优技术，可以加快算法的收敛速度，提高迭代的稳定性和重建精度；引入光滑准则的正则化技术可以有效改善图像重建问题的不适定性，加快迭代的收敛速度，提高迭代的稳定性和图像重建质量，计算正则参数的TPA算法在闪光照相图像重建中是有效的。

Creative point 3. Engrafting fuzzy recognition theory with information security theory, on the basis of elliptic curve cryptographic algorithm in information security theory, this paper presents t'-order iteration encryption, t-order iteration decryption algorithm of fuzzy recognition and authentication.

创新点3。将模糊识别理论与信息安全理论相互嫁接，相互交叉，以信息安全理论中的椭圆曲线加密算法为依据，提出模糊识别的t-阶迭代加密，t-阶迭代解密算法和对加密者的认证。

This paper creatively engrafts elliptic curve encryption algorithm with fuzzy recognition theory, puts forward t-order iteration encryption and t-order iteration decryption algorithm of fuzzy recognition based on elliptic curve.

本文别具心裁地将椭圆曲线加密算法与模糊识别理论相互嫁接，提出基于椭圆曲线的模糊识别t-阶迭代加密与t-阶迭代解密算法。

This method prohibits iteration disconvergence by improper selection of original data. The iteration process guarantees that the congestion condition of the network will not change. And the solved Nash equilibrium has real sense.

该方法可以在一定程度上避免由于初始值选择不当导致的迭代不收敛，而且迭代过程可以保证网络阻塞状况不发生变化，有利于得到符合现实意义的Nash均衡。

The solution of the optimal 3-impulse rendezvous is a multi-variable iteration process. For the 3-impulse rendezvous with terminal coastings, the symmetry characteristic of optimal 4-impulse rendezvous was applied to reduce the number of the iteration variables to save the calculation consumption.

三脉冲最优解的求解采用多变量迭代的方法；对于存在端点滑行段的三脉冲最优解的求解，利用四脉冲最优解的对称性，减少迭代变量的数量，降低了计算量。

This dissertation gives the damping iteration method and geome-tric-mean tracing method, both based on inversion of observed ground-water level data, and also gives the proportional iteration (or ortho-gonalization) method based on inversion of hydrogeologic gradient data.

本文建立了用水位观测资料进行反演的阻尼迭代法和几何均值追踪法，利用水力梯度资料进行反演的比例迭代法。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。