超定问题

The overdetermined BSS problem is studied.

研究了观测信号不少于源信号个数的超定盲信号分离问题。

A fourth-order compact finite difference alternating-direction-implicit algorithm is proposed for solving the unsteady-state Navier-Stokes equations of fluid flow and heat transfer using the streamfunction-vorticity formulation. Point-successive overtaxation iteration is used to achieve the steady solutions.

本文构造了求解二维非定常涡量流函数形式Navier-Stokes方程组的一种四阶紧致交错方向隐式差分算法，对包括能量方程在内的离散化方程组采用逐次超松驰迭代法求得稳定解，求解了二维非定常粘性不可压缩流体的流动与传热问题。

In the system of high precision and low speed, Because of the existence of the nonlinear friction, the static and dynamic performance of the servo system is very bad, such as stick slip, hunting, large error and so on, Because the traditional control of PID is hard to solve the nonlinear problem of the servo system, so this paper begins to introduce a new control method which is named adaptive fuzzy PID, It utilizes the rule of the fuzzy control to adjust the parameter of proportion, integral and differential on line, So this control method has some intelligence to improve the static and dynamic performance of the servo system.

在高精度、超低速伺服系统中，由于非线性摩擦环节的存在，使系统的动态及静态性能受到很大程度的影响，主要表现为低速时出现爬行现象，稳态时有较大的静差或出现极限环振荡；由于传统的PID 控制很难解决伺服系统中的非线性问题，因而不能适用于高精度、超低速伺服系统；本文通过引入模糊自适应整定PID控制，利用模糊规则在线调整比例、积分、微分环节，使系统具有一定的智能，从而非常明显的改善伺服系统的静态及动态性能。

First, for a given integer value of the objective function, the lower and upper bounds of the variables were determined by the optimum simplex tableau of the linear programming relaxation problem. Then the conditions on the bounds were added to the constraints as cuts to the associated objective function hyperplane. Finally, a branch procedure of the branch-and-bound algorithm was applied to finding a feasible solution on the objective function hyperplane.

对于给定的目标函数整数值，首先利用线性规划松弛问题的最优单纯形表确定变量的上、下界，然后将变量的上、下界条件加入约束条件中对相应的目标函数超平面进行切割，最后应用分支定界算法中的分支方法来搜寻目标函数超平面上的可行解。

Due to the development of electronic computers, Analysis of the structure can be simplified plane over to a more precise calculation of three-dimensional space. For ultra-high frequency static set the structure, not only can greatly accelerate the speed, and may perform complex structure of the optimal design.

由于电子计算机的发展，结构的受力分析可有简化的平面问题过度到较为精确的空间立体计算，对于超静定次数很高的结构，不但能大大加快计算速度，并且可能进行复杂结构的优化设计。

Tables of seconx dary fixed end moments for prismatic and haunched beams with straight and parabolic tendons have been prepared for use in practical applications, A method of using concordant pressure line for the elimination of secondary forces due to prestressing is introduc...

本文并介绍了采用协调压力曲线以消除因予加应力所引起的附加内力的方法，同时介绍了通过施工方法消除因收缩与蠕变所引起的附加内力的方法。文中并对按极限状态理论计算超静定予应力钢筋混凝土结构的问题作了一般性的探讨。

Resorting to the relative gradient, we show that the natural gradient algorithm for overdetermined BSS has the same form as that for usual complete BSS.

然后，借助于相对梯度严格证明，完备盲信号分离的自然梯度算法同样适用于超定盲信号分离问题。

And the design method for U-steel yieldable support and combined structure of steel and concrete is discussed.

论文首先介绍了地下工程支护结构理论的发展及其研究现状；结合五轮山煤矿施工现场，论文采用超静定结构力学计算方法、有限元的分析方法，主要对浅埋强风化段支护结构进行了力学分析；在总结现有文献研究成果的基础上，分析了型钢与混凝土的粘结机理，介绍了U型钢可缩性支架缩动前后的内力计算方法，讨论了考虑U型钢可缩性支架稳定性的承载能力问题，阐述了U型钢可缩性支架参数选择的原理。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。