In this paper, the p meson impact parameter dependent parton distributions and the impact parameter dependent form factors are introduced and discussed. By employing a Gaussian form wave packet, we calculate the impac...In this paper, the p meson impact parameter dependent parton distributions and the impact parameter dependent form factors are introduced and discussed. By employing a Gaussian form wave packet, we calculate the impact parameter distributions of the p meson based on a light-cone constituent quark model.展开更多
在冲击电压作用下,电容式电压互感器内部电容元件承受不同的电压,了解电容式电压互感器冲击响应特性对于分析电容式电压互感器内部绝缘故障具有重要意义。本文从一起500 k V电容式电压互感器解体入手,在对电容器及其内部元件参数实测的...在冲击电压作用下,电容式电压互感器内部电容元件承受不同的电压,了解电容式电压互感器冲击响应特性对于分析电容式电压互感器内部绝缘故障具有重要意义。本文从一起500 k V电容式电压互感器解体入手,在对电容器及其内部元件参数实测的基础上,建立了电容式电压互感器的分布参数模型。对雷电侵入波和长线路合闸情况下电容式电压互感器对冲击电压的响应情况进行了分析,分析表明在冲击电压作用下电容式电压互感器高压侧电容分压器首尾两端电容元件承受的电压高于其他电容元件;在电容分压器内部分电容元件发生击穿时,相同冲击电压作用下正常元件承受的电压降升高,将加速冲击电压导致的电容元件损坏;分析结论与解体结果吻合,对于分析电容式电压互感器内部绝缘损坏具有重要意义。展开更多
This paper presents the probability distribution of the slamming pressure from an experimental study of regular wave slamming on an elastically supported horizontal deck. The time series of the slamming pressure durin...This paper presents the probability distribution of the slamming pressure from an experimental study of regular wave slamming on an elastically supported horizontal deck. The time series of the slamming pressure during the wave impact were first obtained through statistical analyses on experimental data. The exceeding probability distribution of the maximum slamming pressure peak and distribution parameters were analyzed, and the results show that the exceeding probability distribution of the maximum slamming pressure peak accords with the three-parameter Weibull distribution. Furthermore, the range and relationships of the distribution parameters were studied. The sum of the location parameter D and the scale parameter L was approximately equal to 1.0, and the exceeding probability was more than 36.79% when the random peak was equal to the sample average during the wave impact. The variation of the distribution parameters and slamming pressure under different model conditions were comprehensively presented, and the parameter values of the Weibull distribution of wave-slamming pressure peaks were different due to different test models. The parameter values were found to decrease due to the increased stiffness of the elastic support. The damage criterion of the structure model caused by the wave impact was initially discussed, and the structure model was destroyed when the average slamming time was greater than a certain value during the duration of the wave impact. The conclusions of the experimental study were then described.展开更多
基金Supported by National Natural Science Foundation of China(11475192)the fund provided to the Sino-German CRC 110 "Symmetries and the Emergence of Structure in QCD" project by the NSFC(11621131001)the Key Research Program of Frontier Sciences,CAS(Y7292610K1)
文摘In this paper, the p meson impact parameter dependent parton distributions and the impact parameter dependent form factors are introduced and discussed. By employing a Gaussian form wave packet, we calculate the impact parameter distributions of the p meson based on a light-cone constituent quark model.
文摘在冲击电压作用下,电容式电压互感器内部电容元件承受不同的电压,了解电容式电压互感器冲击响应特性对于分析电容式电压互感器内部绝缘故障具有重要意义。本文从一起500 k V电容式电压互感器解体入手,在对电容器及其内部元件参数实测的基础上,建立了电容式电压互感器的分布参数模型。对雷电侵入波和长线路合闸情况下电容式电压互感器对冲击电压的响应情况进行了分析,分析表明在冲击电压作用下电容式电压互感器高压侧电容分压器首尾两端电容元件承受的电压高于其他电容元件;在电容分压器内部分电容元件发生击穿时,相同冲击电压作用下正常元件承受的电压降升高,将加速冲击电压导致的电容元件损坏;分析结论与解体结果吻合,对于分析电容式电压互感器内部绝缘损坏具有重要意义。
基金support from the National Natural Science Foundation of China (Nos. 51579103 and 51709118)the China Postdoctoral Science Foundation (No. 2017M612669)+2 种基金the Fundamental Research Funds for the Central Universities (No. 2017BQ089)the Key Scientific Research Projects in Henan Province (No. 18B570005)the Open Research Foundation of Key Laboratory of the Pearl River Estuarine Dynamics and Associated Process Regulation, Ministry of Water Resources ([2017]KJ01)
文摘This paper presents the probability distribution of the slamming pressure from an experimental study of regular wave slamming on an elastically supported horizontal deck. The time series of the slamming pressure during the wave impact were first obtained through statistical analyses on experimental data. The exceeding probability distribution of the maximum slamming pressure peak and distribution parameters were analyzed, and the results show that the exceeding probability distribution of the maximum slamming pressure peak accords with the three-parameter Weibull distribution. Furthermore, the range and relationships of the distribution parameters were studied. The sum of the location parameter D and the scale parameter L was approximately equal to 1.0, and the exceeding probability was more than 36.79% when the random peak was equal to the sample average during the wave impact. The variation of the distribution parameters and slamming pressure under different model conditions were comprehensively presented, and the parameter values of the Weibull distribution of wave-slamming pressure peaks were different due to different test models. The parameter values were found to decrease due to the increased stiffness of the elastic support. The damage criterion of the structure model caused by the wave impact was initially discussed, and the structure model was destroyed when the average slamming time was greater than a certain value during the duration of the wave impact. The conclusions of the experimental study were then described.
