参数变化

And local dark focal spots may be obtained, the focal spot may evolve into a circle, a two-peak spot, or a curve line, which indicates that the combination of nonspiral and spiral phase plates can be used to form novel focal spots.

随着相位片参数变化，焦斑可演化成环形焦斑、具有两个光强峰值的焦斑、或是曲线形焦斑，这些现象说明可以将螺旋和非螺旋两种相位片结合用来调节焦点光强分布，得到新型焦斑。标签相位片焦点移动焦点破裂光陷阱

Due to the physical properties exhibit extremely rapid variations with the change of temperature near the pseudocritical point, the heat transfer performance of supercritical fluids are very different from that of conventional refrigerants.

二氧化碳跨临界循环放热过程处于超临界区，由于在准临界点附近CO2 的热物理参数变化非常剧烈，超临界区流体的换热有别于传统制冷剂，气体冷却器的换热优劣对系统性能影响较大。

Related network structure and hardware configuration of this control system are discussed;the control strategy of intermittent reaction tempe...

结果表明，控制方案使系统抗干扰能力和适应参数变化的能力都优于常规控制，达到了很好的控制效果。

In this paper, the structured and unstructured uncertainties are of primary interest, i.e., the modeling error due to the parameters variation and unmodeled modes, especially the friction and sensor dynamics, neglected time delays, etc.

在这篇论文中，构造好的和未构造好的不确定因素是主要的兴趣所在，也就是说模型的误差导致参数变化和未模型化的模式，尤其是摩擦力和敏感元件的力度，被忽视的时间延迟等等。

However, the control performance of the PMSM drive is still influenced by uncertainties, which usually features parameter variations, external load disturbances, unmodelled and nonlinear dynamics. To achieve high-performance PMSM drive, which has great ability of adaptation and better performance against disturbances, advanced control schemes have to be developed to deal with these uncertainties.

然而，由于永磁同步电机驱动系统受电机参数变化、外部负载扰动、对象未建模和非线性动态等不确定性的影响，要获得高性能的永磁同步电机驱动系统，必须研究先进的控制策略以解决这些不确定性的影响，使系统具有较强的自适应能力和抗干扰能力。

A change in single-screw pump suction valve opening degree, when the suction vacuum is small, pump parameters changed little, and when the suction vacuum is larger, the pump working conditions deteriorated dramatically.

改变单螺杆泵吸入口阀门开启度，当吸入口真空度较小时，泵特性参数变化不大，而当吸入口真空度较大时，泵的工作状况急剧恶化。

The simulation of MATLAB proves the correctness of model. The results of the application show the superiority of adopting Fuzzy- PI- Controller over conventional Pi-Controller in the aspects of reducing excess adjustment, abbreviating adjusting time and having good adaptability.

MATLAB模拟仿真和实测数据表明了该实际控制模型的正确性，应用结果表明在参数变化的情况下，模糊-PI控制在解决系统减少超调、缩短调节时间和良好适应性问题优于常规PI控制，在实际控制中达到良好的控制效果。

Discrete sliding mode theory has been applied to electrostatic levitation system in which general discrete state space expressions with parameter variation have been set up based on gyro rotor electrostatic force equation and other annuluses including high-voltage amplifier, position sensor and time delay.

本文将离散滑模控制理论应用于静电陀螺悬浮系统，根据陀螺转子静电力方程以及各环节特性(包括高压放大器、测量环节和数字控制器的滞后环节)，建立考虑系统参数变化的广义被控对象离散状态空间表达式。

Results The survival area and quality of avulsed flap in the experimental group were superior to that of control group after 15 days of operation, and the hemorheological items were markedly changed at 5 days after operation.

结果 术后15天治疗组撕脱瓣的成活面积、成活质量均明显优于对照组(P＜0.05)，治疗组血液流变学参数变化在术后5天内最明显。

In order to carry on closure safely, reliably, high-efficient and scientifically, it is necessary to carry on computation and analyze to various kinds of situations that may appear while closuring, especially to the change of the hydraulic parameters and the ascertain for the throwing particle-size, hold the key factor among them, carry on the planning, design and construction meticulously, carefully, guarantee the project progress and security.

为了能安全、可靠、高效、科学地实施截流，有必要对截流中可能出现的各种情况进行计算分析，特别是截流过程中的流速等水力参数变化及其抛投料粒径确定等问题作详细的计算研究，把握其中关键性因素，精心、周密地进行截流工程的规划、设计与施工，确保工程进度与安全。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。