four-quadrant中文是什么意思

• 四象限的

• "four"中文翻译    n. 1.四人小组；(套在车上的)四匹马。 2.四的记号 ...
• "quadrant"中文翻译    n. 1.【数学】象限；圆周的四分之一，九十度弧；四分之 ...
• "four quadrant multiplier" 中文翻译 :    四象限乘法器
• "four quadrant operation" 中文翻译 :    四象限操作
• "four-quadrant construction" 中文翻译 :    四象限结构
• "four-quadrant multiplier" 中文翻译 :    四象限乘法器
• "four-quadrant operation" 中文翻译 :    四象限操作
• "quadrant" 中文翻译 :    n. 1.【数学】象限；圆周的四分之一，九十度弧；四分之一圆。 2.【天，海】象限仪。 3.【生物学】四分体。 4.长度单位 (＝ 10，000 kilometres)。 5.扇形体；【机械工程】扇形齿轮。 quadrantal adj.
• "four" 中文翻译 :    n. 1.四人小组；(套在车上的)四匹马。 2.四的记号；(骰子的)四点；(钟点的)四时；四岁。 3.〔pl.〕 四厘公债。 4.(口)四桨小艇；四桨小艇艇员；〔pl.〕四桨小艇竞赛。 5.〔pl.〕 【军事】四路纵队。 6.〔pl.〕【机械工程】四汽缸发动机；四汽缸汽车。 a column of fours 四路纵队。 a child of four 四岁的孩子。 four-and-twenty ＝ twenty-four 二十四。 a coach and four 四匹马拉的大马车。 Form fours ! 〔口令〕排成四列纵队! Fours right [left]! (口令)排成四列向右[左]转! in fours 1. 每组[批]四个。 2. 一柄四叶。 on all fours 1. 匍匐，爬着。 2. 完全一致的，完全吻合的(No simile runs on all fours. 任何比喻都有出入)。
• "aileron quadrant" 中文翻译 :    副翼扇形摇臂
• "azimuth quadrant" 中文翻译 :    地平角限仪; 地平象限仪; 方位像限仪
• "boss of quadrant" 中文翻译 :    舵扇毂
• "brake quadrant" 中文翻译 :    制动扇形齿轮板
• "bubble quadrant" 中文翻译 :    带气泡水准的测角仪; 带汽泡水准的扇形测角仪; 汽泡水准测角仪
• "cardinal quadrant" 中文翻译 :    主部
• "control quadrant" 中文翻译 :    扇形操纵摇臂
• "corner quadrant" 中文翻译 :    角球区
• "counter quadrant" 中文翻译 :    对部
• "dangerous quadrant" 中文翻译 :    危险象限
• "elastic quadrant" 中文翻译 :    弹性舵扇
• "elevation quadrant" 中文翻译 :    射角仪; 仰角象限仪
• "elevator quadrant" 中文翻译 :    升降舵扇形摇臂; 升降机扇形齿轮
• "fanlight quadrant" 中文翻译 :    扇形窗上的扇形档
• "feed quadrant" 中文翻译 :    播种量调节齿板
• "first quadrant" 中文翻译 :    第一象限

• The inverter using dc / dc converter topology is a four - quadrant converter made up of several dc / dc converters in series or parallel
  基于dc dc变换器拓扑逆变器是由数个dc dc变换器串并联而成的四象限变换器。
• The other is supported by emerson network power co . , ltd as an advanced research project . and this paper mainly introduces how to design and realize a four - quadrant running srd system to control a 3kw srm ( 8 / 6 poles ) based on a dsp ( tms320f240 ) , which uses h - bridge power convertor and power - consumption braking method
  本文基于省重点科研项目“开关磁阻电机新型控制及其调速系统”和深圳emerosn网络能源公司预研部项目，分析讨论了如何设计实现一套以3kw的四相( 8 6极) srm为控制对象以dsp为控制核心采用h桥式功率变换器和能耗制动方式的四象限运行srd系统。
• Taking single four - quadrant power switch mode circuit as an example , the operational mode , steady principles , transient voltage feedback control strategy , the auxiliary switching power supply and parallel technology of this kind of converters are investigated . the output characteristic curve and the design for the key circuit parameters are given
  以单四象限功率开关式电路拓扑为例，分析研究了这类变换器工作模式、稳态原理与电压瞬时值反馈控制策略，给出了变换器的外特性曲线、关键电路参数、机内辅助开关电源的设计，对电流源高频交流环节ac ac变换器并联扩容技术进行了研究。
• Taking no account of the non - uniformity of the detector , this paper analyzed the performance of the traditional four - quadrant angle - measurement algorithm and two other algorithms in calculating the pitch angle and the deflection angle of the incident ray , and also compared the error curve of the pitch angle calculated by each algorithm in the full plane
  摘要在不考虑探测器非均匀性影响的情况下，本文分析了传统四象限测角算法和另外几种算法在计算入射光的俯仰角和偏转角时的性能，还比较了在整个平面内各个算法得到的俯仰角的误差曲面。
• The francies " hydro turbine models are induced , comprising of the linear model based on the model characteristic curves , the linear model based on the internal characteristics description , the nonlinear model based on four - quadrant characteristics and simply analytic nonlinear model . as a result of comparison of these models , it is believed that these models have different traits and the proper model should be selected according to the study purpose and known conditions
  归纳介绍了混流式水轮机的模型，包括基于模型综合特性曲线的线性化模型、基于内特性描述的线性化模型、基于全特性曲线的非线性模型和简单解析非线性模型等，对这些水轮机模型进行分析比较，认为它们的特点各有不同，应根据研究目的和已知条件来选择合适的模型。
• Taking single four - quadrant power switch mode circuit as an example , the operational mode , steady principles , transient voltage feedback control strategy of current mode ac - ac mode ac / ac converters with high frequency link are investigated . the output characteristic curve and the design for the key circuit parameters are given
  以单四象限功率开关式拓扑为例，分析研究了电流源交?交型高频环节ac ac变换器的工作模式、稳态原理与电压瞬时值反馈控制策略，给出了变换器的关键电路参数的设计准则和变换器的外特性曲线。
• The thesis presents a group of direct ac / ac topologies including single and three phases ac / ac converters which are based on simple dc - dc topologies and realized by using the single - power tube four - quadrant switches . with only two power switches , these single or three phases ac / ac converters can achieve high quality four - quadrant ac / ac conversion by simple configurations and simple control schemes . the thesis mainly researches on the single phase ac / ac converter in the topologies including ac _ buck and ac _ cuk
  本文介绍了基于直流buck 、 boost和cuk电路,采用单有源四象限开关实现功率双向化的直接ac / ac变换拓扑族,该拓扑族中的单、三相变换电路均只使用两个功率开关,可实现波形优良的同频ac / ac四象限变换,具有电路结构简单、控制简便、可实现小型化等优点。
• These topologies of inverters are composed of two bi - boost dc / dc converters , they are symmetry . so whole circuit turn into four - quadrant converters , we can control every power mosfet on or off . then we can get sine wave with direct current polarization at the left , at the same we also can get sine wave with direct current polarization phase contrast 180 compared of the left at the right
  这类逆变器由左右二个双向boostdc / dc变换器构成,左右二边是对称的,所以整个电路构成了一个四象限变换器,我们可以恰当控制各功率管的开、关,使左边的两象限dc / dc变换器输出一个带直流偏置的正弦波,使右边的两象限dc / dc变换器输出一个相差180度带同样直流偏置的正弦波形,这样,负载zl上的电压是左、右两个dc / dc变换器电压的差动输出,正好可以消掉直流偏置,最终在负载r1上得到的就是正弦波。
• First , variable speed constant frequency wind energy convertion theory is described in this paper , then presents a review on the development of wind turbines control and the main types of generator and static converters used to interface variable speed wind turbines to the electric grid . then discuss main circuit constructure and advantage of direct drive wind energy conversion system and introduce pitch - control method for wind power traction and electric power stability . simply aerodynamic characteristic of the turbine is analysised and permanent magnet synchnonous generator math model is established . to convert the variable frequency electricity into utility grid , back to back four - quadrant pwm - vsi is used and three typies of control strategy is presented to capture the maximum wind energy and transmit energy . then simulation is implemented to test the control strategy . in the following chapter a simple ac - dc - ac converter with a dc - dc boosting chopper is proposed to transmit the wind energy into electricity energy and two control strategy is presented
  建立了永磁电机和变流器的数学模型,针对双pwm变频器的特点提出了三种控制策略对变流器进行控制,通过变流器交-直-交的变换,将发电机发出的变频变幅值交流电转化为可用的恒定频率的交流电,通过pwm调治能使其输出功率因数为一,并且该控制系统功率因数为可调,能在特殊情况下同电网交换一定的无功功率,并通过对变流器的控制实现了最大风能俘获的功能。最后采用matlab / simulink进行了仿真,取得了良好的仿真效果。在风力发电系统中,采用先进的最大功率俘获算法,能有效的从风中获得最大的能量。
• The model is modified after using correlate analysis and regression analysis to estimate whether the four determinants have relevance to and impacts on user value and user satisfaction . the recommendations are given to improve the electronic collection development of sun yat - sen university library based on four - quadrant analysis
  在运用相关分析与回归分析方法研究模型中4个自变量与用户价值感和用户满意度之间的相关性及影响程度的基础上,笔者对模型进行了修正,并运用象限分析法,为中山大学图书馆改进电子资源建设提供了参考性建议。