特性态

Based on the mutual inductance,a technical scheme to change the parameters of asymmetrical phase windings was proposed.

通过引入互感的方法可以定量计算磁链的减小量，并给出了互感计算式，利用有限元法分析了一台样机互感随转子位置和电流的变化规律，理论推导了互感对平均转矩影响的程度，研究了四相8/6极开关磁阻电动机稳态转矩波形在两种绕组连接方式下的不规则特性，结合互感特性，提出了改变不对称相绕组参数的技术方案。

Investigation shows that match characteristics of positive and negative ion beams is the same at the entrance of RFQ.

通过自编程序对RFQ入口处正、负离子匹配特性的研究表明，两种不同电荷态的束流的匹配特性是相同的。

The results show that the IEC-GTO can obtain a better trade-off relation between on-state and turn-off characteristics.

结果表明，IEC-GTO在关断特性和通态特性间获得较好的折中。

The paper calculates and analyses an coupling oscillating mode trait of chute -flow-dam body and the dynamic stability of the chute of overfall concrete face rockfill dam by using ANSYS finite element software and the theory of fluid-solid coupling.

采用ANSYS有限元软件和流—固耦合理论[1，2]，计算、分析了溢流混凝土面板堆石坝的泄槽—水流—坝体的耦合振动模态特性和泄槽动力稳定性，同时应用随机振动理论对脉动压力作用下的泄槽及地基的动力响应作出了定量估算，与原来的双渐方法的结果进行了比较，验证了计算结果的合理性，进而分析了坝体动弹模和堆石厚度对系统动力特性的影响。

It has high friction properties, resemble anti-wear properties and brake moment curve compared with Dunlop company and Messier-Bugatti company carbon brake discs materials. It has excellent mechanics performance and axis heat conduct coefficients compared with abroad carbon brake discs materials. The friction properties of RTO Wetness normal brake increased by 23％-29% than Dunlop carbon brake discs materials.

与英国Dunlop公司、法国Messier-Bugatti公司生产的炭刹车盘材料相比，其高摩擦特性及抗磨损性能相当，刹车力矩曲线形态相似，且力学性能、轴向导热系数明显高于国外炭刹车盘材料，RTO刹车湿态刹车时的摩擦特性高出Dunlop炭刹车盘材料23％-29%。

Such a conclusion can be shown that;(1). Having high relativity between the numerical modeling results and experimental curves ensures the simultaneousness of modeling internal moisture distribution and the unsteady drying process.(2). High non-homogeneity and unsteadiness in the seed drying process.

通过边界条件的处理把反映物料干燥过程动态特性的实验含水率曲线与物料颗粒内部水分扩散有机地结合起来；提出了一种较准确地确定物料颗粒在非稳态脱水过程中内部水分扩散系数和分析内部水分分布及其动态特性的方法。

In this thesis, I summarize the theoretical calculation method, applied scope and notice of siphonic drainage system, and point out the advantage of siphonic drainage system compared with gravitation drainage system. In the archetype experiment study of siphonic drainage tube, I adopt different tube diameter and different structural height to survey the drainage volume and press in different place. I observe various kinds of flow state, and get chief factors which influence hydraulic peculiarity of system as the tube diameter or structural height, and find out the relevance of factor to flux. I apply CFD Fluent software and adopt standard k-ε model and RNG k-ε model, then use finite volume method and second-order upwind scheme to discrete numerical model, while coupling numeration of velocity field and press is based on SIMPLE. In the numerical simulation of curved part of tube, siphonic drainage tube experiment system and multi-outlet siphonic drainage system, I make research on internal velocity and press of system in different project condition by changing the tube diameter of curved part, negative press value in tube export and improving the quantity of water gutter. This thesis first adopts a method of combining archetype experiment and numerical simulation to study the siphonic drainage system, test and verify the validity of experiment and numerical simulation, and makefurther study on system, it solves the problems of limited testing conditions, and has a logical results, it can provide a valid method for optimizing and designing the drainage tube-net system. The conclusion have referring value for study and design of siphonic drainage system.

本文首先对虹吸式排水系统理论计算方法、适用范围以及注意事项做出总结，并分析了虹吸式排水系统的优势；再对虹吸式排水管道进行原型试验研究，采用不同管径不同立管高度，对系统流量、管道压强进行量测，观察了各种工况下的流态，对其水力特性进行研究分析，找出影响水力特性的落差、管径主要因素以及与排水量的关系；进一步应用计算流体力学Fluent软件，采用标准κ-ε模型与RNGκ-ε模型，计算过程应用有限体积法和二阶迎风格式对数值模型进行离散，速度和压力的耦合采用SIMPLE算法，分别对系统弯管段、虹吸排水管道试验系统、多斗虹吸式排水系统进行数值模拟分析，通过改变管段弯头处半径、管段出口负压值、增加雨水斗数对不同工况下系统内部的速度和压力进行研究；本文首次采用结合原型试验与数值模拟相结合的方法，对虹吸式屋面雨水排水系统进行研究，试验与模拟相互验证，并进行拓展，很好地解决了虹吸式屋面雨水排水系统由于试验条件限制问题，结果正确合理，为排水管网系统设计和优化研究提供了有效的方法，对工程设计有较好的参考价值。

Secondly, when kalman filter has reached steady state its error covariance will have a very small stationary value, namely filter dropping off'. Thirdly, the traditional kalman filter cannot adjust its filter parameters with statistic characteristic of the noise. To overcome the deficiency of kalman filter, an SVD-based adaptive kalman filter is put forward in the paper. The filter restrains the filter divergence by matrix singular value decomposition. The eigenvalues and eigenvectors of the matrix are insensitive to tiny change of matrix element and acceptable error.

然而，传统的卡尔曼滤波器存在以下问题：问题一，因噪声统计特性估计不准确和计算机舍入误差引起的滤波发散现象；问题二，在卡尔曼滤波器达到稳态时，其误差方差阵将饱和使其对信号的突变变得不敏感，问题三，传统的卡尔曼滤波器对滤波参数无自适应能力，不能随着噪声统计特性的改变而调整自身的滤波参数。

On the basis of this, the characteristics of steady state compensation and harmonic suppression of the three control strategies are analyzed here.

在此基础上，还对三种控制方式的稳态补偿特性和抑制谐振的特性进行了分析。

The result shows that the reaction rate in loop reactor is better than in stirrer reactor.

在冷态模型装置上研究了环路反应器的流体力学特性和化学反应特性，建立了喷嘴喉部两相流的速度与喷嘴结构和操作压力的函数。

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。