1) instantaneous power direction
瞬时功率流向
1.
Aiming at the real-time working state of PWM converter,a principle and method based on the instantaneous power direction to determine every working state seconds is presented.
针对PWM变流器实时工作状态,提出了一种基于瞬时功率流向法判定PWM变流器每一时刻工作状态的原理与方法,以单相PWM整流及逆变状态为例,详述了其判定方法,揭示了此方法的应用意义。
2) instantaneous power
瞬时功率
1.
Instantaneous power maxima and power spectrum maxima analysis of second heart sounds signals;
第二心音信号的瞬时功率和功率谱极大值分析
2.
The essence of the instantaneous power control in internal mixer is to control the viscosity of mixing material.
密炼机瞬时功率控制的实质是控制混炼物料的粘度。
3.
This paper presents the mathematical model of the three-level voltage source PWM rectifier and deduces the relationships between instantaneous power and the vectors of the three-level rectifier from the theory of instantaneous reactive power.
以三电平电压型PWM整流器的数学模型为基础,结合瞬时无功理论,推导了瞬时功率和三电平整流桥开关矢量之间的关系,提出了一种固定开关频率的三电平PWM整流器的直接功率控制方法。
3) instantaneous fault power direction
瞬时故障功率方向
4) instantaneous power spectral density
瞬时功率谱
1.
Based on that the instantaneous power spectral density with spatial frequency is derived.
本文提出了解决车辆非平稳随机振动问题的“瞬态空间频响函数”法 ,导出了车辆非匀速行驶时的时 -空频率关系和系统的瞬态空间频响函数 ,在此基础上结合实例分析了车辆非平稳响应的瞬时功率谱 ,并与其他方法进行了比较。
5) instantaneous reactive power theory
瞬时无功功率
1.
To avoid some shortages which exist in the harmonic current detecting methods now, such as time delay, large computation, and so on, an improved ip-iq algorithm based on instantaneous reactive power theory is presented.
针对现阶段对电网谐波电流检测方法中普遍存在的时延、计算量大等不足,提出了一种基于瞬时无功功率理论的改进ip-iq变换法。
2.
The paper introduces the concepts and working principles of the Unified Power Quality Conditioner(UPQC) and presents an improved measuring method based on the generalized instantaneous reactive power theory.
介绍了综合电能质量补偿装置(UPQC)的概念及工作原理,提出了一种以广义瞬时无功功率理论为基础改进的检测方法,该方法克服了以往一些检测方法的缺陷,并能快速、准确地检测出电网电压的降落、升高、不对称以及谐波等各种干扰。
3.
It is introduced that harmonic current in the electric network and harmonic current detecting method based on instantaneous reactive power theory in the paper,and then it presents the current detecting method in the anisomerous mains voltage,aberrance circuit based on instantaneous reactive power theory.
通过对电网谐波和瞬时无功功率理论在谐波检测中应用的分析研究,作者给出了基于瞬时无功功率理论的检测方法在电网电压不对称、存在畸变时的电流检测方法。
6) Instantaneous reactive power
瞬时无功功率
1.
Analysis of the essence of three-phase instantaneous reactive power theory and its lacuna;
对三相瞬时无功功率理论本质及其缺陷的分析
2.
Simulink simulation on harmonic detection of power system based on the theory of instantaneous reactive power;
基于瞬时无功功率理论的电力系统谐波检测的Simulink仿真
3.
Study of high-order harmonic current detecting method based on instantaneous reactive power theory
基于瞬时无功功率理论的电流高次谐波检测方法研究
补充资料：旅游者流向与流量
旅游者流向与流量
旅游者流向与流里在一定时期内多数旅游者旅行的地域趋向。在洲际旅游中，旅游者一般集中于欧洲、北美、东亚和太平洋地区;在洲内旅游中，旅游者一般流向邻近国家和地区;在国内旅游中，旅游一般由城市流向乡村。与旅游者流向密切相关的因素，有旅游者收入水平，旅游设施与服务质量，旅游者的兴趣爱好，旅行安全与旅游地自然、地理、历史特征等。旅游者流向的趋势常常由于政治、战争、恐怖活动等而受到影响。一定时期内流向某地域的旅游者数量称为旅游者流量。旅游者流向与流量的多少，对于旅游接待国或地区的旅游业发展有重要意义。它是旅游市场上各旅游接待国或地区之间竞争的主要目标。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条