查询词典 stability

According to the model's actual background,discussing the random variable coefficient equation and using direct method,we obtain sufficient condition for the uniform stability and the globally asymptotic stability of difference equation,and also give examples to show they can not substitute each other.

本文根据种群模型的实际背景，讨论了任意变系数方程利用直接方法获得了所讨论方程的零解的一致稳定和全局渐近稳定的充分条件，并举例说明了这两个充分条件不能相互代替。

The activity test shows that the Ni/Ce-Zr-Al-Ox catalyst has a CH4 conversion of 89％ and a good stability, and the CH4 conversion increases to 94％ by adding 3.2％ steam. In addition, due to the suppression to unreactive carbon, it can be expected that the stability of catalyst will be further promoted.

活性测试结果表明， Ni/C-Zr-Al-Ox催化剂显示了89％的CH4转化率和良好的稳定性，添加3.2％的水蒸汽后活性提高到94％，由于对非活性积碳的抑制，可以预料其稳定性也将进一步提高。

Through such a study, it is also shown that when the time delay is long enough such that the stability switches of the equilibrium of system halt, the bifurcation branches originated from the critical time delays cannot be surely stable or unstable in the whole solution space, that is, their stability depends on cases.

利用打靶法的数值结果说明了当系统平衡点不再发生稳定性切换时，源自这些临界时滞处的解支的稳定性在整个解空间的稳定性具有不可判定性，这也说明由多尺度法所得高阶近似判定的解支的稳定性事实上只表示解支在局部中心流形上的稳定性，而非在整个解空间中的稳定性。

The mechanisms ofthe magnetic field influence to the stability of the vacuum discharge are analyzed also,and it isproved that the second anode action of the magnetic filtering duct can improve the vacuum arcdischarge stability of the system dramtically.

就磁场对系统弧放电稳定性的影响的机理进行了讨论，肯定了磁过滤管道作为第二阳极对提高弧放电稳定性的作用。

With the aim of control pneumatic stability fault and ensure the safety and function of aero-engine,The method To survey and change The two pneumatic stability faults include speed lost and pant vibratility of aero-engine has been an important researchful subject matter.

如何对航空发动机失速和喘振这两类气动失稳进行测量、变换，以便对气动失稳进行控制，确保发动机安全和性能是当前国内外航空界的一项重要研究内容。

The stability of red pigment in fruits of Viburnum luzonicum Rolfe and factors of influencing the colour stability were studied in vitro.

对离体吕宋荚蒾果红色素的稳定性及其影响因子进行了分析探讨。

Based on the theory of"S-R"stability for the voussoir beam, the paper analyses the mechanics boundary condition, the distribution features of displacement and stress fields, the relationship between working resistance of supports and roof-to-floor convergence, roof stability in tip-to-face area in fully mechanized mining with sublevel caving etc.

论文视直接顶为可变形体，得到直接顶岩层破断角的大小和直接顶的强度及高度有关，传统的P一Δl双曲线关系并不适用于直接顶的高度成倍增加以后的情况。

When the electricity power system runs correctly, the excitation control system maintains the voltage of the generator and the whole system, distributes the wattless loads equitably over the generators, improves the steady-state stability and the dynamic stability of the electricity power system.

在电力系统正常运行的情况下，维持发电机或系统的电压水平；合理分配发电机间的无功负荷；提高电力系统的静态稳定性和动态稳定性[1]。

The stability of them has an vital influence on project implementation,which is also hand in glove with discontinuity surface, for example,joints,fissure,fault and weak interbed etc.These discontinuity intersect vertically and horizontally ,which makes great difference in property between it and integrated rock.On that account,we should do deepgoing research on deformation failure mechanism and stability analysis for rock mass slopes.

节理岩体边坡的稳定性跟边坡中的不连续面的关系密切，如节理、裂隙、断层以及软弱夹层等，这些结构面纵横切割，使得岩体的性质与完整岩石大相径庭，因此，必须对节理岩体边坡的变形破坏机制和稳定性分析作深入的研究。

Based on dq model in the unified reference frame, at first the steady-state dq model in the stator power winding synchronous speed reference frame was obtained; next the method of the static stability analysis was presented and the small signal model was developed, and then the stability condition was given by means of Lyapunov theorem and the input conditions of different control strategies were studied.

在其任意坐标系下dq模型的基础上，推导出功率绕组同步速坐标系下稳态dq模型；提出一种静态稳定性分析的方法，并建立小信号模型；由李雅普诺夫稳定判据得出电机稳定运行的条件，并且根据不同的控制策略讨论其输入条件。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。