特性指数

In this paper, the problem of the robust stability and decay estimations of such control system is considered. Several new criteria are given by applying the differential theorem, the decay rate for this class of system is also obtained.

根据微分方程理论和矩阵指数特性，提出了具有不确定性的时滞控制系统与时滞相关和与时滞无关稳定的充分性判据，并给出系统衰减速率的估计方法。

It is more rational that the liquidity index I combined with the void ratio e characterizes the behavior of silt-clay.

而採用液性指数I结合孔隙比e反映粉质粘土的特性更加合理。

It is more rational that the liquidity index IL combined with the void ratio e characterizes the behavior of silt-clay.

而采用液性指数IL结合孔隙比e反映粉质粘土的特性更加合理。

R-T characteristic is not a strictly exponential curve and material constant is the function of temperature.

研究表明，NTC多晶氧化物半导体的电导是由晶粒中载流子的热激发并穿过晶界势垒形成的，电导同时受晶粒和晶界的控制；材料的电阻–温度特性不是严格的指数曲线；材料常数与温度有关。

In experimental studies an experimental system has been constructed, which is suitable to investigate the Q-V characteristics under damped oscillation and double exponential impulses.

在试验方面，首先建立了一套适合于衰减振荡波和双指数雷电波等快速冲击电晕伏库特性研究的模拟试验系统。

The corona Q-V characteristics can be obtained automatically by the modle for different waveshapes such as damped oscillation and double exponential impulses.

最后，从试验与计算的结合上进一步探讨在冲击电晕过程中的反极性电晕机制及其对衰减振荡波和双指数雷电波电晕伏库特性的影响。

According to diseased leaf rate,disease index and reduction in fresh weight,the influence factors of SYAU-06 strain infection dayflower were studied from three aspects of biocontrol fungi,host developmental stages and environment condition.

以病叶率、病情指数和鲜重抑制率3项指标为原则，从生防真菌自身的生物学特性、杂草的发育阶段和环境条件三个方面研究SYAU-06菌株侵染鸭跖草发病的影响因子。

This paper studies the main geometrical parameter such as angle, height, width, stagger and the upper width in dentation and trapezoid flow path, firstly, uses the single-phase numerical simulation of the computational fluid dynamics technique to analyse the influence of different geometrical parameter on discharge coefficient and flow state exponent of drip emitter. Secondly, uses the two-phases numerical simulation of CFD (1% sand content ) to analyse the influence of the above mentioned geometrical parameter on the contribution regulation of sand and anti-clogging performance. Thirdly, uses the PIV （ particle Tracking Velocimetry ） technique which can see the small-scale flow path to observe and test the trajectories and velocities of solid particles in labyrinth flow path, and analyses the basic factors which can influence the movement characteristic of solid particles and the flow state in flow path.

本文以齿形流道、梯形流道为主要研究对象，以流道转角、流道高，流道宽、偏差量及梯形流道上底宽为主要结构参数，首先应用 CFD 单相流数值模拟技术对不同结构参数灌水器流道水力性能进行模拟，分析了不同结构参数对流态指数和流量系数的影响，其次，应用 CFD 两相流（含沙量为1%）数值模拟技术分析了结构参数对含沙量分布规律和抗堵塞性能的影响，然后，应用 PIV 可视化测试方法测试了固体颗粒在流道内运行轨迹及速度，分析了影响固体颗粒运动特性及流道内流体流态的基本因素，最后，对上述流道结构形式通过模具加工及滴灌带试制，进行了标准化测试（ GB/T 17187-1997 农业灌溉设备滴头技术规范和试验方法与 ISO 标准 ISO /TC23 /SC18 /WG5N4短周期堵塞测试程序），测试结果验证了 CFD 模拟结果，并提出了迷宫结构流道灌水器的抗堵塞设计方法。

By simulation and derivation,the degree of nodes in this model...

通过计算机模拟和公式推导，该模型中节点的度分布显示出幂律尾部的特性，而且其衰减指数在一定条件下与实证研究结果是一致的。

A common feature in all these applications is that the exponential part of the progress curve has to be first determined by certain graphical methods such as the semilog-plots.

在所有的底物反应动力学应用实例中都存在一个共同的特性，即首先用适当的作图法求解过程曲线中的指数项。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。