Papers by Keyword: Evaluation Method

Abstract: Research on reliability of distribution network has very important meaning and function to ensure the quality of power supply. This paper introduces some basic concepts of reliability in distribution network, including distribution network reliability definition, task and index. The classical reliability evaluation method was reviewed, and focused on specific distribution network, an example analysis was given, and specific reliability evaluation indexes were calculated. Finally, the future development of distribution network reliability evaluation was made a simple prospect.

Abstract: At present, the influence of implementing demand side management on generation system reliability was studied by more and more academics. Demand side management can improve energy efficiency and reduce the maximum load demand, which is equivalent to an indirect increase in power generation capacity of the system, thus can improve the reliability of generation system. This paper firstly introduced the reliability index system of generation system, then the reliability analysis model which includes generation capacity model and load model was respectively built, and then the non-sequential Monte Carlo simulation method applied in generation system reliability evaluation was analyzed. Secondly, adopted the simulation to quantify and set the IEEE reliability testing system RTS (Reliability Test System) as an example to analyze the effect of demand side management on generation system reliability evaluation, the analysis results show that the implementation of DSM can improve the energy utilization and reliability of generation system, thus the system can be more secure, economic and reliable to supply electric power for electricity users.

Abstract: The basic mathematical method for power system reliability evaluation was indicated, the simple and complex system was respectively introduced, several methods of reliability analysis of simple was given in this paper, and the reliability evaluation indexes system and methods of composite generation and transmission system was analyzed, then focused on state enumeration method applied in the reliability assessment of system, the detailed example analysis was given and the adequacy reliability indexes were computed in detail. Finally, the current reliability evaluation and status of composite generation and transmission system was summarized simply and its reliability evaluation algorithm steps applied in current actual engineering projects was given.

Abstract: This paper conducts an analysis on the driving factors of the intensive use of urban land on the basis of defining the connotation of using intensive land use; constructs a evaluation system of the use intensity of urban downtown land from the aspects of quantity structure of land us, the land input intensity, the land use intensity and the efficiency and sustainable development of land use; applies the method of AHP to confirm the weights of evaluation indexes; makes weighted summation of each index based on the standardization of original data and index weight, in order to get the comprehensive index of land use intensity, aiming at quantitatively confirming the level of land use intensity in urban downtown and exploring the quantitative evaluation method of land use intensity in downtown area. This paper selects the downtown area of Zaozhuang as the example to apply for and examine this evaluation method.

Abstract: This paper analyses the necessity of building the evaluating index system for repair quality of representative equipment. This paper studies its repair process, and gives the principle of founding the index system. And then combine with the repair in facts, it establishes the evaluating index system and gives the counting methods and meaning of the basic index at last.

Abstract: Aiming at the research status in the field of the equipment maintenance quality evaluation methods, this paper describes the basic type of them in detail, mainly in evaluation mode and arithmetic, points out their characteristic and problems, and analysis and compares them. At last it offers theoretical reference for equipment maintenance quality evaluation methods research.

Abstract: To analyze the machining performance of grinding machine and improve the quality of tooth surface, this paper proposes an integrated model of processing performance evaluation of computer numerical control gear grinding machine. Based on the gear profile grinding machine kinematics principles, the topology modification formulas of tooth surface were deduced. Calculated the process capability index according to experimental data and found that the tooth surface errors were followed normal distribution. The main reason of formation errors was analyzed by cause and effect diagram. Finally, the validity of this integrated model of processing performance evaluation is numerically demonstrated using CNC gear grinding machine.

Abstract: The evaluation of node importance is a very meaningful research in complex networks. This paper analyze the characteristics of complex network and consider the effects of nodes for the evaluation of node importance, introduces the idea of data field in theoretical physics and establishes the evaluation method of node importance based on topological potential in complex network. Through the theoretical and experimental analysis, it is proved that this method can evaluate the importance of node in complex network in a fast and accurate way, which is significant both to theory and practice.

Abstract: Reflective thermal insulation coatings (RTIc) are applied widely in Hot Summer and Cold Winter Zone and in Hot Summer and Warm Winter Zone. A feasible evaluation method for energy saving effect is very important for acceptance of energy efficient building construction. Combining with the research on RTIc at home and aboard, series of evaluation indicators of thermal insulation performance and energy saving effect of RTIc such as solar reflectance, hemispherical emittance, temperature, thermal resistance, energy efficiency and thermal inertia were summarized and the existing problems and several suggestions were also proposed.

Abstract: The accuracy of the results of the evaluation after the construction project is largely dependent on the choice of the evaluation method is reasonable and scientific. In this paper, the current methods for the evaluation of projects for a more systematic study were compared and analyzed; and proposed the construction of the factor analysis method for the analysis of project evaluation, and gives two reasons for the application of this method .