查询词典 stability conditions

The number and stability of the limit cycles of a class of polynomial system with degree n are studied under some conditions by means of the results about Abel equation.

并利用关于Abel方程的这些结果得到了一类n次多项式系统在一定条件下极限环的个数和稳定性。

Based on the new functional, delay-dependent sufficient conditions for absolute stability are derived in terms of linear matrix inequalities.

并由此基于线性矩阵不等式，得到了系统与时滞相关绝对稳定的充分条件。

Several sufficient conditions of absolute stability are established, and definiteresults are obtained for some cases of the so-called Letov's problem.

建立了绝对稳定性的若干充分判据，并对所谓列托夫问题的几个情况给出了肯定的回答。

At the same time, for the process additive and multiplicative uncertainties mostly encountered in practice, the sufficient and necessary conditions for holding the control system robust stability are analyzed, and thus, an intuitive determination method is provided based on the spectral radius criterion.

同时，对于实际中最常见的被控过程的加性和乘性不确定性，分析了控制系统保证鲁棒稳定性的充要条件，由此给出了基于谱半径判据的直观判定方法。

The effects of the immobilization conditions, the structure of spherule, the mechanical strength, elasticity, stability, and the activity of the bacterial enzyme were investigated, analyzed and determined the immobilization conditions.

探讨了固定化条件对固定化小球结构、机械强度、弹性、稳定性和培养后菌体的谷氨酰胺合成酶的活性情况的影响，分析确定最佳的固定化条件。

Extraction of edible red pigmengt from solanum nigrum fruit by optimum seeked process conditions, determined single factor condition, designed orthogonal layout, and measured absorbance at 527nm wavelength, weighed up the pigment extracting effect and stability. The most favoured extracte conditions were determined as follows: The extracting regent was citric acid hydrotropic solution, pH was 1.72, the quantities of added sample to the solution was 3.35g/100mL, the temperature was 60℃, the extracting time w...

以成熟的龙葵果为原料提取食用红色素，通过优化工艺、确定单因素条件、设计正交试验，以527nm波长的吸光度值衡量色素提取效果和稳定性；最优化的提取条件为：柠檬酸水溶液提取剂pH为1.72，样品加量3.35g/100mL，提取温度60℃，浸提时间60min；龙葵红色素提取液长期接触光、空气和Fe3+，稳定性下降，因此，在提取、干燥和储存时要尽量避免长时间接触光和空气、避免与铁制容器直接接触。

By presupposing the system uncertainties satisfying certain matching conditions, a sliding-mode switching manifold and a SMC law are proposed, which are invariable to the structural uncertainties and possess the parameters without stochastic noise. Then, the accessibility of the sliding mode and the stability of the closed-loop system are analyzed, and some necessary conditions are further obtained to select the parameters for the SMC law.

在系统的不确定性满足一定匹配条件的情况下，构造了对不确定性具有不变性以及参数不含噪声激励的滑模切换流形和变结构滑模控制律，分析和证明了滑模的可达性和闭环系统的稳定性，并给出了滑模控制律的参数选择条件。

A simplified mechanical model of a typical axially loaded sleeved compression member is introduced. Some reasonable constitutive relation curves of the inner steel tube are chosen for analyzing in two numerical examples. One is analysis on its axially loaded bearing capacity under different working conditions. The other is stability analysis of grid structure with SCM. The buckling control effect of the inner steel tube is evaluated with the outer steel tube applied in these conditions.

阐述了轴心受压情况下典型套管构件的简化力学模型，选择利用合理的套管构件内核本构关系，用2个算例（内核圆钢管不同工况下的轴压承载力分析和网架结构应用套管构件的稳定计算分析）分析了外钢管对轴心受压内钢管的失稳控制效果。

In orde to obtain system optimization in high efficiency production and operation safety, the microcosmic problem of goaf treatment was brought into the creative design of mining method and the synergism of two problems was studied. Firstly, in view of the occurrence characteristics and mining conditions of catacalstic ore section of orebody No. 105 in Gaofeng mine in Guangxi province, considering the adaptability to different scale goafs in the ore section, based on mining environment reconstructing idea and continuous mining mode, a new mining method (mining environment reconstructing non-pillar sublevel-strip continuous mining method) was put forward. Then, some repr, esentative goafs were selected and their stabilities were calculated by discrete element method on the basis of differences of goaf scale, surrounding conditions and situ stress field. At last, the mining layout was adjusted on the basis of goafs stability analysis and the goafs were adjusted as a part of cutting engineering, blasting space or stope, so as to determine all kinds of goafs treatment schemes.

摘 要：为在生产高效和作业安全上取得系统整体最优，将碎裂矿段的空区处理微观问题纳入采矿方法创新设计宏观问题中，开展2种问题的协同研究：首先，针对广西高峰矿105号矿体碎裂矿段的赋存特点和开采技术条件，考虑对各种规模空区适应性，基于采矿环境再造和连续采矿理论，提出采矿环境再造无底柱分段分条连续采矿法；然后，根据采空区规模、围岩状况和原岩应力场等条件的差异，在所有采空区中选择具有代表性的空区，运用离散元程序对其稳定性进行计算分析；最后，在稳定性分析的基础上，灵活调整开采布局，将采空区调整为部分切割工程、自由爆破空间或采场，从而确定出各种规模空区的处理方案。

The pulverized systems optimized operation in power station is a multi-variable, non-linear and time-variant issue which is restricted by many conditions, such as combustion stability, mill safety and furnace slagging problem, in addition, the controlling parameters and restricted conditions are coupling each others.

电站制粉运行优化是一类多变量非线性时变系统，同时受到燃烧稳定性、磨的安全性、炉膛结焦等因素约束，且控制参数和约束条件之间相互耦合制约。

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。