交流分析

The most crucial point to the dynamic analysis is the drawing of alternating current load line.

动态分析的对象是交流通路，图解法动态分析的关键是作交流负载线。

Chapter three: The use of Internet media and Internet communication Within the theoretical frame of the uses and gratification, this chapter quantitatively researches audience's behavior in the use of Internet, and the interactive relations between Internet communication and interpersonal communication, dealing mainly with the personalization, impersonalization and hyperpersonalization of Internet communication.

第三章：网络媒体的使用与网络交流以使用与满足理论为框架，对受众的网络使用行为进行量化分析，并研究网络交流与人际传播之间的互动关系，重点考察网络交流中的人际性、非人际性和超人际性的特点。

The feasibility,effectiveness and limitation of four improvement measures are studied:raise protection settings or prolong protection delay;apply inverse time limit ;use additional criterion to distinguish valve fault from AC system fault;and adjust 100 Hz protection configuration principle.

为减小交流系统故障期间直流100Hz保护动作的概率，利用PSCAD/EMTDC仿真分析软件，就阀故障和交流系统故障时直流线路50Hz/100Hz电流特性进行了分析，研究了提高保护定值或延长保护动作延时、采用反时限特性、利用附加判据区分交流故障和阀故障、调整直流100Hz保护配置原则4种措施的可行性、使用后的效果及局限性。

Based on an analysis of the significance of the information resources advancement of the scientific papers online-exchange, the paper systematically analyzed the barriers of the information resources advancement from traditional notional、scientific evaluable、legal、technological points of view with particular emphasis on the attitudes and actions of various subjects、scientific researcher、scientific institution 、magazinist, and pointed out the struggling direction for the healthy and sustainable development of the scientific papers online-exchange.

刘杰武汉大学信息管理学院；武汉大学信息资源研究中心；武汉大学知识产权高级研究中心在分析我国科技论文在线交流资源推动的原因及意义的基础上，从传统观念文化、传统科研评价及激励机制、法律和技术角度对制约我国科技论文在线交流资源推动的因素或障碍进行了系统分析，重点分析了不同学科、科研人员、科学协会、期刊出版商的相关态度和做法，从而为我国科技论文在线交流健康可持续的发展指明了努力方向和突破口。

Processing efficiency as a result of cutting-axis achieve the revitalization of planning released the equipment manufacturing industry to adjust exhaust turbocharger atc common faults and exclusion of high-speed cutting edge technology used in the blanking die in and outside the ring of rolling bearing fault diagnosis methods of the term commonly used brief summary of metal material factor in the quality of process performance aluminum water purification technology gap separating sub-micron technology the basic principles of rotary broaching the installation of the basic principles of positioning technology in the context of the characteristics of the engine crankshaft camshaft grinding high-speed implementation of the project highlights the emergence of diagnostic bearing cage diagnostic system 10 cases of preventive measures hardening die steel crack analysis of elastic deformation of the analysis error δφ maintenance and repair pneumatic tools processing tools prismatic conical shape when the surface of the workpiece form error ina sets of cylindrical sliding zgb200x220x180 ina sets of cylindrical sliding cylinder zgb180x200x180 ina zgb160x180x150 ina sets of cylindrical sliding sliding sliding cylinder zgb140x155x150 ina sets zgb120x135x120 ina sets of sets of cylindrical sliding zgb110x125x100 ina sets zgb100x115x100 ina cylindrical cylindrical sliding sliding sliding cylinder zgb90x105x80 ina sets zgb80x90x80 ina sets of sets of cylindrical sliding zgb70x80x70 cnc machine tools in general the structure of the spindle drive motor and the use of the exchange servo motor,the dc converter or to eliminate brush maintenance and high-speed electrical and mechanical constraints,through the belt driving the movement to the spindle,so that the spindle reaches a certain speed to achieve the stepless speed regulation,and consistent use of the speed signal converter to confirm the speed of the motor to achieve the directive,and then cutting into the knife,resulting in improved efficiency

摘 要：由于加工切削效率轴达到实习心得振兴数控机床实习心得发布装备制造业调整废气涡轮增压器常见故障及排除换刀高速切削技术的优势在冲裁模中废旧滚动轴承内外环设备故障诊断常用简易方法名词简介金属材料工艺性能铝材质量因素净化水处理技术空白亚微米分离技术回转拉削基本原理定位安装的基本原则特征技术产生的背景发动机曲轴凸轮轴的高速磨削加工五轴机实施中数控机床实习心得涌现诊断轴承保持架诊断系统预防措施10例模具钢淬火裂纹分析弹性变形误差δφ的分析维护及保养气动工具棱体成形车刀加工圆锥面工件时产生的形状误差 ina 圆柱滑动套 zgb200x五轴机x180 ina 圆柱滑动套数控机床实习心得180x200x180 ina 圆柱滑动套 zgb160x机床实习心得x150 ina 圆柱滑动套 zgb数控机床实习心得x155x150 ina 圆柱滑动套 zgb120x135x120 ina 圆柱滑动套 zgb110x125x100 ina 圆柱滑动套 zgb100x115x100 ina 圆柱滑动套 zgb90x105x80 ina 圆柱滑动套 zgb80x实习心得x80 ina 圆柱滑动套 zgb70x80x70 数控机床的主轴机床信息交流网结构一般采用交流电机和伺服电机，采用变频器或以消除直流电机电刷维护和高速限制，通过带传动把运动传给主轴，进而使主轴达到一定的转速来实现无级调速，同时利用变频器的速度一致信号来确认电动机达到了指令速度后，再进刀切削加工，从而提高了效率

Sano model and deduced by the rate equations for excess electron and excess hole, can be used in DC analysis, AC analysis and transient analysis. The result of DC photoelectric characteristic simulation coincided with the experiment very well.

Sano模型为基础，结合过剩电子、空穴速率方程得到的，可用于直流分析、交流分析和瞬态分析，其直流光电特性模拟分析结果与已报道的实验结果符合得很好。

To fine reasonable solution, in Chapter 3, its stable state stability has been analyzed in detail, including in the self-excited mode and external-excited mode separately.

在比较各种调速方法的基础上，首先对交流励磁变速电机的应用前景进行了分析，并分析了交流励磁变速电机的研究现状。

Through on-site observation, interviews, analysis of their parents and teachers to exchange dynamic behaviour drawed: The purpose of parents' meeting with children is too simple and lack of opportunity for the exchange of awareness; Most of them are so impatient that miss the opportunities of communicating with teachers. Facing more than 30 parents at the same time, teacher can alleviate pressure on exchange through cooperation with other teachers. In exchange status, teachers played a dominant role to give professional guidances, major parents will listen to the views of teachers, less be active to express their own views. Whether parents or teachers, the use of communication strategies can effectively enhance communication effectiveness.

通过现场观察、访谈，分析接送交流中家长和教师的动态行为得出：家长接孩子目的单一，较心切，缺乏等待交流时机的意识；教师需要合作分工缓解交流压力；在交流地位上，教师发挥专业指导作用处于主导地位，家长以听取教师意见为主，有陈述己见趋势；但无论是家长还是教师，交流策略的使用能有效地加强交流的有效性。

Through the analysis of the work principle of three phases voltage resource PWM converter, set up the low and high mathematic models, deduce the restriction equations about grid voltage, grid current, modulation voltage and the DC output voltage and the calculation equations of the AC-side inductance and the DC-side capacitance. There are two control strategies are adopted: Predicted current control strategy and voltage-current two closed-loop control strategy, and give a comparison by theory and practice.

通过分析三相电压源型PWM变换器的工作原理，分别分析了低频和高频数学模型，并推导出了交流侧电压电流、调制电压、直流侧电压之间的数学约束关系以及交流侧电感和直流支撑电容参数的选取依据公式；分析对比了两种控制策略：预测电流控制和电压电流双闭环控制并加以实验验证；同时采用了负载电流前馈补偿和本文提出的一种基于专家系统的神经元新型智能PI控制器两种方法大大提高了整个系统的动态响应性能，并在仿真和实验中加以验证，这也是本文研究的重点内容之一。

The quantitative and qualitative methodologies were both used in this thesis, andby presently observing of English Immersion classroom teaching and video taperecording, a lot of information about teacher-child speech interaction was collected. Theinternational Child Language Data Exchange System, known as CHILDES, wasadopted to analyze the collected information qualitatively and quantitatively.

本项研究采用量化研究和质性研究相结合的方法，通过对幼儿园大、中、小班英语浸入式教学活动的现场观察和录像收集师幼言语互动语料，运用国际通用的儿童语言数据交流系统——CHILDES，对收集到的师幼互动交流言语数据进行统计分析，在对研究资料进行量化分析的同时，对研究结果进行质性的分析和讨论，并提出了相应的教学建议。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。