离散问题

This thesis carries on research to a class of nonlinear Schrodinger Equation with wave operator of initial value periodic problem.

本文针对一维带波动算子的Schrodinger方程周期初值问题进行数值研究，对上述方程首先构造了守恒的半离散格式，然后将p次Hermite插值方法与有限差分方法相结合构造了差分正交样条配置格式，并证明这两个格式均为稳定和收敛的格式。

Considering the key to the bivariate simple equation is innumerability and the high security, we use Schnorr's signature scheme and Wu et al.'s signature scheme, present a new multi-signature scheme based on the bivariate simple equation.

我们分析研究了基于Schnorr方案和吴挺等数字签名方案，提出了基于离散对数问题并以二元一次不定方程为基础的一个多重数字签名方案。

Both methods for the construction of 2-i-i-dimensional integrable models together with techniques for the calculation of exact solutions are discussed.

通过连续的和离散的特征值问题的非线性化得到某些新的有限维可积系统和一个新的可积辛映射。

Based on a chosen normalized boundary equation, a new normalized boundary equation can be established such that the irregularity of the kernel of integral equations is overcame. Finally, natural frequency is obtained by the existence condition of nontrivial solution of the discrete algebraic equations derived from the integral equations.

边界方程有多种选择，在选定一种边界方程的基础上，可以通过建立一个新的边界方程来表示问题的边界，以克服积分核的奇异性；最后由积分方程的离散化方程组有非平凡解的条件，求得固有频率。

An objective interestingness function of rule is given.

讨论了数量关联规则提取过程中的连续属性离散化方法和规则的有趣性问题，给出了数量关联规则的客观兴趣度的度量函数，提出用模板匹配方法挖掘用户感兴趣的规则，以解决数量关联规则有趣性的主观评测，研究了一种挖掘支持度和兴趣度最优的形如(A∈ [v1 ，v2 ]∧ C1 ) C2 (其中 A为连续属性，C1 、C2 为类别属性)的数量关联规则方法，并将该方法应用于股市行情分析，实验结果表明是非常有效的。

With consideration of the trade of the power market and the reserve market, participation of consumers into the reserve market through interruptible loads is studied.

通过综合考虑电能市场和备用市场的电力交易，研究了需求侧用户以可中断负荷的方式和发电侧共同参与备用市场的问题，建立了电网公司购买电能和备用容量的离散混合优化模型，给出了详细的求解算法。

By means of the intractability of ellipse curve discrete logarithm problem,a new secret sharing threshold scheme with double renewing is presented.

利用椭圆曲线离散对数问题的难解性，给出了一种新的双重更新秘密共享方案。

In order to solve the composite inversion problem of the flexible arm structure, an improved identification method is proposed by combining the relaxation method with the modified total compensation method.

为了解决悬臂型桥墩结构在输入信息未知条件下的物理参数识别问题，采用将松弛法与改进的全量补偿算法结合起来的算法，通过对参数的离散化，对输入未知条件下的－悬臂型桥墩结构的多个物理参数进行了识别。

We also get optimal competitive strategies and their competitive ratios. Compared to the results of Karp and El-Yaniv, the introduction of information of input structure lea...

相对于Karp及El-Yaniv等人的研究结果，由于引进了输入信息使得竞争比性能分析提高；相对于Fujiwara等人的研究结果，本文研究了存在利率时离散性情形，给出了问题的最优解。

The PetrovGalerkin formulation is applied to solve the genera lized Stokes problem in each subdomain, and the Lagrange multiplier problem on the interfaces is solved using an algorithm of conjugated gradient. Velocity, density and Lagrange multiplier are approached in the spaces of continue piecewise linear functions.

应用PetrovGalerkin方法解每个子域上的广义Stokes问题，而交界面上的Lagrange乘子则通过共轭梯度法迭代求解，各变量均由线性函数离散。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。