查询词典 The Matrix

Paper studies the practical stability of electricity market models by tools, for example, the appropriate structure Lyapunov functions, Cauchy matrix, the matrix measure, constant variation. Judging practical stability sufficient conditions and estimating formula of ultimate convergence boundary are provided. Conditions are descriptive by coefficients of models. At the same time, paper studies the Lyapunov stability of the electricity market. As well as the sufficient conditions of judging electricity market Lyapunov stability are provided. Some of conclusions improved the results of Alvarado and others. The conclusion of Lyapunov stability has made a comparative with practical results.

首次将实用稳定性理论和方法应用于电力市场稳定性的研究中，借助于构造合适的Lyapunov函数、柯西矩阵、矩阵测度、常数变易法等工具，系统研究了所建电力市场模型的实用稳定性，得到了用模型的系数来描述其实用稳定性的一系列判定条件和最终收敛边界的估计公式；同时对电力市场的Lyapunov稳定性进行了研究，得到了电力市场稳定性的若干判据，部分结论改进了Alvarado等人的结果；随后将Lyapunov稳定的结果与实用稳定进行了比较。

The common method, that all strong-correlation terms of the model are eliminated, can bring the loss in the engineering application, so the new method is proposed that the identified model reserves some correlation. The augmented matrix A is constructed by the outputΔW and the matrix S. The"determinating order based on ratio of determinant"is brought out to screen the strong-correlation terms in the structure identification. The latent root estimation is improved in screening the eigenvalues and eigenvectors. Thus the estimation precision is improved greatly.The consistence check of guidance instrument error coefficients of flight test and ground test is the purpose of flight experiment. The causes of inconsistency of the two models are analyzed. The hypothesis test of linear regression model based on F statistics is proposed to check the consistence.Finally, the instability of error coefficients is probably caused by the change of the flight environments, therefore, the relation between the error coefficients and flight environment is analyzed. The approach is presented to identify SINS guidance instrument error models and compensate the error in the segmented sections corresponding to the change of vertical acceleration of aircraft.

在结构辨识中，常用的方法由于将模型中的强相关项全部剔除而给工程应用带来损失，因此，本文提出了新的有益思想，即在保留一定相关性的基础上进行辨识：将输出向量ΔW与环境函数矩阵S构成增广矩阵A，然后采用"比定阶行列式"来剔除相关向量的方法，这样既可以尽可能多地保留了对落点影响大的强相关参数，又可以对落点影响小的强相关参数给予剔除；在参数估计中，改进了特征根估计中特征根和特征向量的筛选方法，提出"近零"准则，从而大大提高了参数估计的精度；再者，鉴于天地模型"一致性"检验是飞行试验和SINS制导工具误差系数分离的主要目的，因此，本文又深入分析了造成天地模型不一致的原因，提出了采用基于F统计的线性回归模型假设检验方法来进行捷联制导工具误差模型的天地"一致性"检验；最后，鉴于飞行环境剧烈变化可能会对惯性仪表误差系数稳定性带来一定的影响，因此本文深入地分析了SINS制导工具误差系数与外界环境的关系，提出了基于过载变化大小的分段辨识和分段实时补偿的算法。

In this paper, the dynamic compressing experiments for the matrix material of the tungsten alloys which have been three different deforming(0%、 32.6%、 44.6%) processed have been performed by the experimental technology of separated Hopkinson pressure bar and many accurate datum have been obtained. Also the three materials have been compared with each other and analyzed. The results show that the optimized values are in a certain range to optimize the materials by changing their deforming technology. The parameters of constitutive model of Johnson-Cook have been fitted based on the datum. Then proceed to the next step, adiabatic shear band of these three matrix materials has been analyzed with finite element method. The result shows that the relations between stress and strain are different because of the differences of technical process of the three materials, but they are in great commonness in the material experiment and in great coherence in the distribution of time and space, which can been seen from the space distributing figures of plastic strain.

利用分离式Hopkinson压杆实验技术对三种不同变形量(0%、32.6%、44.6%)钨合金基体材料进行动态压缩实验，取得大量精确的数据，对比分析三种材料，结果表明通过改变变形量对材料进行优化，其变形量的优化值是有一定范围的；本论文拟合、确定了钨合金基体材料Johnson-Cook本构模型参数并对三种基体材料绝热剪切带进行有限元分析，结果表明三种材料由于工艺流程的不同，应力应变关系也不尽相同，但从塑性应变的空间分布图上体现了材料很大的共性和时间以及空间分布的一致性。

There are four kinds of fracture ways of 7075/SiC composite under high-temperature compression, which are the evulsions of SiC from the matrix due to forming cavity near the interface and intensive phase , ductile fracture of the matrix due to the nucleation of cavity near the interface , the fracture near SiC particulate coacervate and brittle fracture of the SiC particulate.

喷射沉积7075/SiC复合材料高温压缩时的断裂方式主要有四种，即空洞在增强相与基体界面处形成而出现增强相从基体中拔出的现象、空洞在基体中形核长大而引起基体的延性断裂、颗粒团聚处的断裂和颗粒的脆性断裂。

It enables one to count the number of frequencies exceeded by a given trial frequency. On the basis of the method. Professor Qi has got a new criterion for detecting the eigenfrequency by using the physical meanings of the matrix used in the congruent transformation of the dynamic stifmess matrix.

在此基础上，齐朝晖教授充分利用将结构动刚度矩阵合同变换过程中各矩阵的物理含义，提出了求解结构固有频率的新判据。

The results of DSC and TG studies showed that the blends maintained the heat stability as that of the matrix. The dispersion of the reinforcing phase in the matrix can be well maintain under the circle heating and cooling heat treatment, which is important for its applications.

DSC和TG的研究结果表明，所获得的共混体系基本上保持了基体本身的热稳定性，同时共混体系的热稳定性还受到嵌段共聚物含量的影响；在反复的升降温过程中，嵌段共聚物在基体中的分散状态得到很好的保持，表现出相当的相结构稳定性，这一性质对于材料在工业上的应用意义重大。

The error equation of the observer is transformed into state matrix according to the characteristics of the system. The parameters of the observer are designed using the eigenvalues of the matrix, and this idea is used to prove the stability of the system.

通过系统特性把观测器系统误差方程转换为状态矩阵方程的形式，根据矩阵特征值的特点设计观测器参数，并把这一思想用到观测器控制器系统的稳定性证明中。

We look at the matrix map, the horizontal axis for market share, vertical axis is satisfied, we can see a lot of blue in the high point of market share range, is in the first quadrant and the fourth quadrant, only the domestic air-conditioning and refrigerator Brand is a high degree of satisfaction with the first Matrix, a general view that our domestic brands can be said to occupy a cost-effective in the low-end market, but in terms of satisfaction to be improved.

我们看一下矩阵图，横轴为市场份额，纵轴是满意度，可以看到大量蓝点分布在高的市场份额区间，就是在第一象限和第四象限，仅有空调和冰箱的国产品牌是属于满意度较高的第一矩阵，所以总体来看说明我们的国产品牌，可以说性价比占据了中低端市场，但是满意度方面还是亟待提高。

The experimental results indicated that, along with the variation of matrix composition, the percentage of the matrix area and the mean grain size increased while the contiguity of grains decreased with the increase of isothermal hold time.

实验结果显示；随著烧结持温时间的增加，基地相面积比率增加、接触性降低而晶粒大小则随之增加。

For the cognoscenti the Second Matrix it is too virtually interactive, too controllable, to seem real—at least compared with the more law-like external world. Real interactivity is the potential for interaction with others also engaged in virtual interaction, and real interaction is the extent to which this potential is realized.

对于评论家来说，相比更规范的外在世界，第二个Matrix中的交互作用太虚假了，太易控制了真正个体间的交互作用也对虚拟交互作用有潜在影响，真正的交感就是潜在交感被意识到的结果。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。