查询词典 delay

Firstly, the conception of networked control systems, introduction and content of networked control systems theory are introduced. Secondly, the network induced time delays of different topology structure are analyzed and then the corresponding plants are modeled. Based on the above, a compensation scheme for the transmitting time delay from controller to actuator is developed. And also a sliding mode controller that makes the system robust is designed.

首先，介绍了网络控制系统的概念和网络控制系统理论的发展概况、研究内容及现状；其次，对不同拓扑结构的网络控制系统的延时进行分析并引入了相应的系统模型：在此基础上，针对网络传输产生的控制器到执行器的延时问题，对不确定输入延时系统提出了一种补偿策略，设计了滑模控制器，使系统具有强鲁棒性。

Induction heating furnace is a complex delay system.Exact mathematical model is not easy to be established.

感应加热炉是一个复杂的非线性大滞后系统，很难建立一个精确的数学模型，用常规的控制方法难以得到满意的效果，而且人工调试比较困难，在扰动比较大的时候，就会远离设定值。

Health education on diabetes can be avoided fluctuation of blood sugar due to improper injection,skin induration and the occurrence of infection and improve the capacity of self-care,effective control of blood sugar, reduce or delay the occurrence of complications and improve quality of life of patients.

糖尿病的健康教育可以使患者避免因注射不当而出现的血糖波动、皮肤硬结及感染的发生，提高自我护理能力，有效地控制血糖，减少或延缓并发症的发生，提高了患者的生活质量。

Because of the universal existence of parameter perturbation and the fault ineluctability for actuator and sensor, it is more important and practical to study robust fault-tolerant control of parameter perturbation for linear system with time-delay.

由于参数扰动的广泛存在性以及执行器和传感器发生故障的不可避免性，使得研究具有参数不确定的时滞系统的鲁棒容错控制问题具有更重要的现实意义。

Our work on the problem of robust controller design for linear time-delay systems with nonlinear uncertain parameters are mainly concerned about thefollowing three aspects:Firstly, based on Lyapunov theory and using linear matrix inequation method, we put forward a plan to design the state feedback controller of the system with high structured uncertainty and matrix polytope structured uncertainty.

第三，在非结构不确定性假设下，基于系统的解和Bellman-Gronwall不等式，得出这类系统鲁棒稳定的充分条件。

For delay discrete-time linear system, saturant function is introduced. Thesufficient condition of GAS and RAS is presented by saturant function infimum.

针对时滞离散线性系统，引入饱和函数，利用饱和函数的下确界，建立了系统全局渐近稳定和局部渐近稳定的充分条件。

Functional differential equation; evolutional equations about population;neutral integral equation; cone; fixed point index; infinite delay; m -accretive operator; random fixed point; condensing map

论文导师孙涛，论文学位硕士，论文专业基础数学论文单位东北大学，点击次数 14，论文页数 70页File Size1670K

The conclusions can be drawn through numerical simulation: The hydrate-forming region becomes small with increasing circulation rate and inhibiter concentration, and it is possible to make the hydrate-forming region away from sea floor by increasing circulation rate and inhibiter concentration, thus preventing blowout preventer lines from hydrate plugging; the decrease in gas volume fraction in the annulus due to hydrate formation reduces pit gain, which can delay the detection of well kick; the possibility of hydrate presence at a relatively low gas production rate is much greater than that at a relatively higher production rate; the bottom hole pressure is affected little by hydrate phase transition, and it is allowable not to consider hydrate phase transition when the bottom hole pressure is calculated; shut-in casing pressure cann't truly reflect gas kick due to hydrate formation and the situation is getting worse with time

模拟计算结果表明：溢流期间，天然气水合物的生成区域会随着循环流量的增大或抑制剂浓度的提高而减小，可通过增大流量和抑制剂浓度使水合物的生成区域脱离海底，减小防喷器管线被堵塞的危险；水合物的生成使环空中气体体积分数降低，泥浆池增量减小，给溢流检测带来延迟；当检测到有气侵发生时，水合物藏分解速率比较小时，井筒中生成水合物的可能性要比分解速率大的情况下更为严重；水合物相变对井底压力的影响较小，在工程中计算井底压力时可以忽略；由于天然气水合物的生成使得关井套压值不能真实反应气侵情况，而且随着时间的增加情况会更加严重。

In the third chapter, some results of inhomogeneous abstract delay equations are given.

在第三章中，给出了非齐次抽象时滞方程的一些结果。

In this paper we consider a spatially inhomogeneous competition diffusion system with distributed delay.

我们在本文中所考虑的是后者，即含有无穷时滞的竞争扩散系统。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。