查询词典 discrete problem

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。

Firstly, by means of the intractability of discrete logarithm problem, a threshold secret sharing scheme with periodic renewing to identify cheaters is established.

本文阐述了秘密共享方案的研究现状及背景，设计了安全。。。

To weaken the influences of the position-dependent periodic disturbances and parameter uncertainties, the robust repetitive controller was designed, which associated structure singular value theory with the discrete-time repetitive control theory. The problem of robust repetitive control was transformed into one of H∞ optimal control using linear fractional transformation. The robust repetitive controller was achieved using D-K iteration procedure and made the servo system have stability, robustness and tracking performance.

为了削弱周期性扰动及参数变化不确定性的影响，将重复控制和结构奇异值理论相结合，利用线性分式变换(linear fractional transformation，LFT)将鲁棒重复控制问题转换成H∞最优控制问题，采用D-K迭代法设计鲁棒重复控制器(robust repetitive controller，RRC)，实现系统的稳定性和鲁棒性，提高系统的跟踪特性。

We construct algorithms in which directions are computed by these two systems and the step-sizes are generated by Armijo line search to solve the original constrained optimization problem and prove that the discrete scheme based on the differential equation system with the second order information has the locally quadratic convergence rate under the local Lipschitz condition.

我们构造了搜索方向由两个微分系统计算，步长采用Armijo线搜索的算法分别求解这个约束最优化问题，在局部Lipschitz条件下基于二阶信息的微分方程系统的迭代方法具有二阶的收敛速度。

The synchronization problem in the distributed multimedia system is studied in this paper. The basic concept and convention about formalized stand language LOTOS are introduced,and the language is improved and extended by adding discrete time domain and time operator for establishment of its syntactic and semantic rules.

就分布式多媒体系统DMS中同步问题进行了分析与探讨，首先论述了形式化规范语言LOTOS的约定与基本概念，然后对其进行了基于时间的扩充，引入时间操作算子，确定了相应的语法定义和语义规则。

The problem is treated as a two-dimensional medium with the discrete wave- number method in the vertical direction.

我们将问题看成是垂向均匀的二维介质，并沿垂直方向变换到离散波数域。

In a two-echelon newsvendor problem, how to incentive the information holder-the retailer to tell the true demand information is provided in discrete and continuous market state. And the optimal cooperation mechanism of supply chain is put forward. Finally, two examples are illustrated.

针对由一个制造商和一个零售商组成二级报童问题，分别从离散需求模式和连续需求模式给出了激励零售商诚实申报需求信息的条件，提出了实现供应链联合最优的激励机制，并用2个实例对合作机制设计进行了说明。

Conventionally the electric load forecasting can hardly attain a result whose accuracy meets what's required. A short-term load forecasting model is therefore developed to solve the problem, based on the process neural network of which the input is the function of time and the high forecasting accuracy is available. Describes the structure of the model, discrete data fitting method by the expansion of function orthogonal basis and learning algorithm.

针对目前常用方法在解决负荷预测问题时，结果往往难以达到工程要求精度的现状，利用过程神经网络输入为时间函数以及预测精度高的特点，建立了基于过程神经网络的电力系统短期负荷预测模型；给出了模型的结构，基于函数正交基展开的离散数据拟合方法以及模型的学习算法。

The stabilization problem of unstable periodic orbit s embedded in chaotic discrete-time systems is discussed.

研究混沌离散系统中不稳定周期轨道的镇定问题。

To obtain quadratical convergence, however, strict complementarity condition at the Danskin point was used. The condition is too strict to be satisfied in many practical problems such as discrete semi-infinite minimax problem. Another kind of Newton method for finite minimax problems was presented by E. Polak and, without strict complementarity at the Danskin point, superlinear convergence (of order 3/2) was proven.

Polak等人提出了一种直接求解极大极小问题的二阶收敛的牛顿法，但是为获得二阶收敛速度要求在Danskin点处满足严格互补条件，这个条件太强，很多实际问题尤其是半无限极大极小问题的离散化不满足该条件；他们又给出另外一种牛顿法，在不假设严格互补条件成立的情况下，证明了它的超线性（3/2阶）收敛性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。