搜索结果: 1-15 共查到“动力与电气工程 method”相关记录23条 . 查询时间(0.137 秒)
基于分层模型配电网结构知识表示的拓扑分析方法（A Method of Topological Analysis Based on Structure of Knowledge Representation for Distribution Network of Hierarchical Model）
配电网 知识表示 电网建模 拓扑分析 人工智能
2010/8/17
提出基于分层模型的配电网建模和拓扑分析方法，对配电网的结构知识表示采用了分层处理的方法，整个配电网分为厂站层、线路网络层。其中线路网络层又分成双层树结构，上层树结构表示出线断路器、分段开关、联络开关的逻辑连接关系，下层树结构表示负荷节点与邻近开关的逻辑关系。人工智能的框架表示法，可以方便的完成配电网结构知识表示，并且为实现了基于电网图搜索的拓扑分析方法打下基础，实践表明该方法实现简单，可靠实用。
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SF6 新气痕量杂质气相色谱分析新方法与电力行业SF6 新气推荐标准（A New Trace Impurity Gas Chromatography Analysis Method for SF6 New Gasand Recommended Standard of SF6 New Gas for Electric Power Industry）
SF6新气 痕量杂质 色谱方法 标准
2010/8/17
介绍了一种SF6新气痕量杂质气相色谱分析的新方法。与DL/T 920—2005《六氟化硫中空气、四氟化碳的气相色谱分析方法》相比较，新方法可以从SF6新气中检出更多的痕量杂质，甚至多达17种，且方法高度智能化并便于普及。考虑到SF6新气中某些杂质会影响有关电力设备的使用寿命，提出了电力行业SF6新气推荐标准的方案。
换流站直流侧空气净距及海拔修正计算方法（Air Clearance and Its Altitude Correction Method for the DC Side of Converter Stations）
g参数法 海拔修正 直流侧空气净距 迭代
2010/8/17
对g参数法的计算原理进行了阐述，提出了基于g参数法的直流侧空气净距迭代计算方法，并应用该算法计算了国内在建的楚雄换流站和穗东换流站工程中直流侧空气净距。将计算结果与工程实际采用的推荐值比较表明，该算法是可行的。
Hindrances associated with examination of two-layer structures with use of the eddy current method
Non-destructive testing Eddy currents Flaw detection
2009/12/3
Purpose: Determination and description of essential phenomena that occur during examination of two-layer
structures with use of the eddy-current method. Development of guidelines to establish procedu...
分布式参数输电线路电磁暂态分析新方法（A Novel Electro-Magnetic Transient Analysis Method for Distributed Parameter Transmission Lines）
电磁暂态分析方法 输电线路 投影变换
2010/8/17
根据函数逼近原理，输电线路的电报方程可以整理为一组正交基的线性组合。文章采用Daubechies正交基，经过投影变换，映像到与依赖于时间变量的和建立在确定架构的函数空间，与输电线路的电压和电流相关的微分方程被转换为代数矢量方程。从而，建立起每一单元的投影等效模型，然后可以在投映域中对输电系统的暂态进行计算。利用EMTP仿真验证了所建议的方法。
SOLUTION OF ONE-DIMENSIONAL MOVING BOUNDARY PROBLEM WITH PERIODIC BOUNDARY CONDITIONS BY VARIATIONAL ITERATION METHOD
moving boundary problem variational iteration method temperature distribution
2009/10/14
In this paper, the solutions of the one dimensional moving boundary problem with periodic boundary conditions is obtained with the help of variational iterational method. By using initial and boundary...
HEAT-BALANCE INTEGRAL METHOD FOR HEAT TRANSFER IN SUPERFLUID HELIUM
heat-balance integral method superfluid helium heat transfer
2009/10/14
The heat-balance integral method is used to solve the non-linear heat diffusion equation in static turbulent superfluid helium (He II). Although this is an approximate method, it has proven that it gi...
HOW GOOD IS GOODMAN'S HEAT-BALANCE INTEGRAL METHOD FOR ANALYZING THE REWETTING OF HOT SURFACES?
rewetting quenching heat balance integral method
2009/10/14
This paper discusses the application of heat-balance integral method for solving the conduction equation in a variety of rewetting problems. A host of rewetting problems for various geometry, convecti...
ON THE GOODMAN HEAT-BALANCE INTEGRAL METHOD FOR STEFAN LIKE-PROBLEMS
heat balance integral Stefan problems analytical solution
2009/10/14
Since the pioneering studies of Goodman on the application of the integral method to transient non-linear heat diffusion, much attention has been devoted nowadays to what is called heat balance integr...
APPLICATION OF HEAT-BALANCE INTEGRAL METHOD TO CONJUGATE THERMAL EXPLOSION
thermal explosion conjugate heat balance integral method
2009/10/14
Conjugate thermal explosion is an extension of the classical theory, proposed and studied recently by the author. The paper reports application of heat-balance integral method for developing phase por...
ELEMENT FREE GALERKIN METHOD FOR TRANSIENT THERMAL ANALYSIS OF CARBON NANOTUBE COMPOSITES
carbon nanotube nano-composites continuum mechanics
2009/10/14
This paper deals with the transient thermal analysis of carbon nanotube composites via meshless element free Galerkin method. A three-dimensional representative volume element containing single nanotu...
NEW ENGINE METHOD FOR BIODIESEL CETANE NUMBER TESTING
auto-ignition biodiesel cetane number
2009/10/14
Substitution of fossil fuels with fuels that come from part renewable sources has been a subject of many studies and researches in the past decade. Considering the higher cost and limits of production...
A METHOD FOR THE LONG-TERM SCHEDULING OF HYDROTHERMAL POWER SYSTEM WITH MULTIPLE USER RESERVOIRS
long-term hydrothermal scheduling multiple-user reservoirs power system planning
2009/10/14
This paper presents an optimization-based method for the long-term scheduling of hydrothermal power system with several multiple-user reservoirs. The proposed method maximizes the profit of various ty...
ENTROPY-CYCLE METHOD FOR ANALYSIS OF REFRIGERATION MACHINE AND HEAT PUMP CYCLES
ideal cycle real cycle irreversibility
2009/10/13
Real and ideal cy cles of any com plex ity can be com pared through the definition of the irreversibilities and ways of their minimization in the thermodynamic analysis. The paper considers the use of...
RELIABLE SIMPLE ZONAL METHOD OF THE FURNACE THERMAL CALCULATION
thermal calculation boiler furnace zonal method
2009/10/13
The calculation of the furnace in the industrial and power boilers is the most important and the most responsible part of the thermal calculation, and it has important influence on the rationalization...