性能描述

Firstly, the basic idea of MFT is described. Next, the factors universe of discourse and their weights are determined. Finally,MFT is used for evaluating general performance of the communication networks.

文中首先描述了MFT的基本思想，然后确定了影响通信网不同性能级别的因素论域及各因素的分级表，再利用统计法算出各因素的权，最后采用MFT评估出通信网的综合性能指标。

The principle, formula, characteristics and dosimetric test results of the radiochromic film dosimeters were described.

文章描述了该剂量计的工作原理、配方、物理性能及其剂量学性能测试结果。

So, it needs to research the modeling and simulation of MIMO channels. The parametrical models of MIMO fading channels are needed to analyze the effect of different array topological structures and different channel parameters on the performance of the communication system, and verify the performance of signal processing algorithm.

故需要对无线MIMO衰落信道的建模与仿真技术进行研究，需要建立参数化的便于描述的无线衰落信道模型，以便于分析不同天线拓扑结构与无线衰落信道传播参数对系统性能的影响，便于信号处理算法的设计与性能验证。

We give a quantitive analysis and comparison to these three models and provide a decision-making reference for the model select...

描述性能测量常用的三种应用模型，对这些模型进行了定量的性能分析，给出了模型选用建议。

According to the definition and the distribution of VSR's voltage space vector, the introduction of a rule-based SVPWM current control strategy, with non-fixed switching frequency and dual hysteresis loops, that obviously improves the performance of current control. Based on two kinds of control strategies of VSR under unbalanced grid condition, the introduction of a new VSR control strategy featuring undamped-oscillation that simplifies the controller structure and effectively improves VSR's performance under unbalanced grid condition. A systematic description of the state switching in trilogic PWM signal generation of threephase CSR by using the conversion between bilogic and trilogic switching functions.

作者在如下工作的基础上对PWM整流器的一些关键问题提出了自己的研究思路、观点和方法：根据PWM整流器网侧矢量关系，直观地描述了其四象限运行的基本原理及特征；定量分析了VSR、CSR的PWM换相过程及波形特征；引入等效变压器模型并详细分析了VSR、CSR基于d—q模型的动、静态特性；提出了满足四象限有功、无功运行指标时的VSR交流侧电感设计方法；并提出了依据控制系统跟随性和抗扰性性能指标设计VSR、CSR直流侧储能元件的参数计算方法；在研究了VSR电流控制策略基础上，提出了影响VSR电流控制的几个要素，并进行了定量分析；根据VSR空间电压矢量的定义及分布，提出了基于规则控制的不定频滞环空间矢量PWM电流控制策略，并由此提出了具有双滞环特性的不定频滞环优化SVPWM电流控制策略，有效地改进了滞环PWM电流控制性能。

On the other hand, we introduce fidelity amplitude that weighs the stand or fall of quantum information transmission result. The high fidelity and the low fidelity amplitude is, the better capability of information transition is. In this paper, pure quantum theory method was mainly applied to study fidelity evolution problem of some typical models of quantum optics, researches on fidelities of the interacting systems between field and atom have been studied deeply.

本文运用纯量子理论，研究了一些典型有意义的量子光学模型保真度演化规律，对光场与原子相互作用的保真度演化特性作了较深入的研究，并引入描述量子信息传输性能好坏的另一个物理量保真度振幅，保真度越高，保真度振幅越小，系统的保真性能越好。

In order to solve the problem of engine starting characteristics calculation under windmilling condition, a generalized format of engine starting nonlinear mathematical model based on liner-in-parameters model was given.

针对高空风车条件下航空发动机起动性能估算问题，给出了用线参数模型描述发动机风车起动非线性过程的一般形式，利用约简遗传规划算法进行模型结构选择的思路，建立了基于约简遗传规划的航空发动机起动性能计算模型。

The exchange and adsorption properties of LA, FA and glu on six anion exchange resins were investigated, and the influence of the temperature was also researched, among them weakly basic ion-exchange resin 335 can provide the highest uptake capacity of LA The Freundlich equation can explain the adsorption equilibrium curves of LA on the anion resins better than the Langmuir equation.

在静态吸附性能研究部分，研究了乙酰丙酸、葡萄糖和甲酸在六种阴离子树脂上的静态吸附行为，筛选出吸附性能最好的335树脂，Freundlich方程比 Langmuir方程能更好的描述树脂对乙酰丙酸和甲酸的吸附。

Based on analyzing performance of gear machining system and mechanism of machining error, the description method of machining error was presented for gear machine. According to the performance-driven design concept and generalized multi-body certainty theory, driven by gear machining error, machining error fine model and system integrated design method of CNC gear shaper was studied.

本文在分析齿轮加工机床的系统性能和加工误差产生机理的基础上，提出了加工误差描述方法；以&性能驱动设计&为基本理念，以齿轮加工误差为驱动，以广义确定性多体系统为理论基础，研究了数控插齿机加工误差精细分析和系统集成设计方法。

Thorough studies indicate that the decrease of grain size is the main reason for the increase of the varistor electrical field.

非线性系数是描述压敏电阻性能最重要的参数，非线性系数越高，压敏电阻的非线性性能越好。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。