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| 1 | Space charge behaviors in cable insulation under a direct current‐superimposed pulsed electric field显示文摘When high‐voltage direct current(HVDC)cables are subjected to a direct current(DC)‐superimposed pulsed electric stress,the pulsed voltage applied facilitates electrical tree generation and breakdown;however,the mechanism involved remains unclear.To study the deterioration mechanism of cable insulation under a pulsed electric field,an experi-ment on the dynamic characteristics of space charge under a DC‐superimposed pulsed electric field was conducted.For this experiment,a pulsed time trigger control circuit was developed to accurately measure the change law of the space charge in cross‐linked polyethylene samples at the rising and falling edges of the pulsed electric field.The experimental results showed an unusual change law:the space charge density increases with falling voltage amplitude and decreases with rising voltage amplitude.The sudden change in the electric field breaks the balance of the forces acting on the space charge,leading to injection,extraction and migration.The energy released during these dynamic processes may destroy the microstructure of the insulation material and contributes to the growth of the electrical tree.This study provides an insight on the initiation mechanism of electrical tree in HVDC cables and proposes a strategy to suppress electrical tree initiation. | Dongxin He Tao Zhang Fansong Meng Qingquan Li Wei Wang Hongshun Liu Gilbert Teyssedre | 2021 | High Voltage2021，6，3： | 4 |
| 2 | Charge vibration behaviour in polyimide under the pulse voltage with different rise and fall times显示文摘High‐voltage electronic equipment is widely used in power systems,which normally operate under the pulse voltage condition.However,compared to DC or AC stress,the electrical insulation suffers a more severe ageing process under a pulse voltage with steep edges and so may cause electrical equipments to fail early.The charge behaviour in polyimide under the pulse voltage with different edge times was investigated in this study.The experimental results show that charges vibrate at the pulse edge,while the amplitude of charge vibration increases with decreasing edge times.Furthermore,the detected vibration signal is strong within the nanosecond edge times,while being negligible in the microsecond range.Notably,the amplitude of charge vibration at the falling edge is larger than that at the rising edge in the presence of the column‐plate electrode.It is believed that the resultant force acting on the charge increases drasti-cally at the pulse edges,leading to the charge movement and the generation of ultra-sonic waves,with the resultant force becoming larger when the edge times decrease.Charge vibration behaviour is harmful to the microstructure of insulation materials,and so it may be concluded that the rise and fall times of the pulse voltage play an important role in insulation failure. | Tao Zhang Dongxin He Junyu Wei Hongshun Liu Qingquan Li Gilbert Teyssedre | 2022 | High Voltage2022，7，1： | 2 |
| 3 | hnpact research of inductive FCL on the rate of rise of recovery voltage with circuit hreakers显示文摘 | LI Qingmin LIU Hongshun LOU Jie | 2008 | IEEE Transactions on Power Delivery2008，23，4： | 1 |
| 4 | Application of SrAl_2O_4:Eu^(2+) Down–conversion Powder in Flexible Dye–Sensitized Solar Cells显示文摘TiO2 nanotube(NT) was firstly prepared on titanium foil by an electrochemical anodization method, and then modified via subsequent deposition of a layer of SrAl2O4:Eu2+ phosphor embedded within TiO2 nanoparticles to fabricate photoanodes of dye–sensitized solar cells(DSSCs). The effect of doping down–conversion Sr Al2O4:Eu2+ phosphor in DSSCs was investigated. SrAl2O4:Eu2+ can effectively convert ultraviolet light to visible light within the range of the dye commonly used in DSSC to increase the photocurrent of DSSC, and enhance the open–circuit voltage by a p–type doping effect. When the ratio of Sr Al2O4:Eu2+ in the doping layer is optimized to be 1wt.%, the photoelectric conversion efficiency of the DSSC reaches 3.09%, which is increased by 38.6%, compared to that of the DSSC without Sr Al2O4:Eu2+ doping. | WANG Lijun LI Yueying HAO Hongshun GUO Weihua SU Qing JIN Shanshan QIN Lei GAO Wenyuan LIU Guishan HU Zhiqiang | 2015 | Journal of the Chinese Ceramic Society2015，，2： | 1 |
| 5 | Independent oncogenic and therapeutic significance of phosphatase PRL‐3 in FLT3‐ITD–negative acute myeloid leukemia显示文摘 | Shuang Qu Bin Liu Xiaoling Guo Hongshun Shi Meifeng Zhou Li Li Shulan Yang Xiuzhen Tong Haihe Wang | 2014 | Cancer2014，，14： | 1 |
| 6 | Multi-variable Dependent Forecast Algorithm for Predicting Secondary Arc显示文摘Hybrid reactive power compensation(HRPC)combines step-controlled shunt reactors and series compensation,and will be employed in ultra-high-voltage(UHV)power systems.The single-phase auto-reclosure characteristics of secondary arcs in systems with HRPC require further investigation.In this paper,both the arc-recalling voltage and subsidiary variations in arc current are investigated with and without HRPC.The frequency components of the secondary arc current and variations in arcing time are analyzed for various influential factors,such as the neutral reactor,arc resistance,fault location,degrees of compensation of HRPC,and the length of the transmission line.The non-dominated sorting genetic algorithm II(NSGA-II)and support vector machine regression are combined to create a multi-variable dependent forecasting algorithm to predict the characteristics of the secondary arc in UHV systems with HRPC.This paper provides a theoretical reference for optimizing the parameters of HRPC,and for developing adaptive auto-reclosure schemes and protection equipment. | Hongshun Liu Jian Guo Dongxin He Mingming Han Ying Sun Jingjing Yang Qingquan Li | 2020 | CSEE Journal of Power and Energy Systems2020，6，2： | 1 |
| 7 | Characteristics of Partial Discharge in Oil-paper Insulated Needle Plate Electrode Model Under Composite AC-DC Voltage显示文摘Converter transformers are the core device in ultrahigh voltage direct current(UHVDC)transmission systems,and the oil-paper insulation at its rectifying valve side deals with the composite AC-DC voltage.A detailed investigation of the partial discharge(PD)mechanism in the oil-paper insulation under the composite AC-DC voltage is,therefore,very important.The oilpaper insulated needle plate electrode simulation model for the electric field and charge distribution can be established using hydrodynamic drift-diffusion theory and bipolar charge carrier theory,and the simulation results can reflect the morphological changes of PD.The development characteristics of PD under composite AC-DC voltage are researched.In addition,the effects of simulation time,the AC-DC component proportion,and model parameters on PD are also explored.Results indicate that differences in applied voltage,interface charge,and geometry structure can cause changes in the electric field strength,which consequently influences the PD process in the simulation model.Oil-immersed paperboard is a type of liquid-immersed dielectric(LID).When the LID is arranged in perpendicular,only the positive streamers have narrow channels oriented toward the LID.When the LID is arranged in parallel,the PDs are in the form of creeping discharges and the negative streamers are more dispersed.The development characteristics of PD and its influencing factors reported here may provide theoretical and simulation support to explain the physical mechanism of PD at the rectifying valve side of the converter transformer. | Hongshun Liu Zhitong Xue Simeng Li Qingquan Li Dongxin He Tian Xia Jian Guo | 2020 | CSEE Journal of Power and Energy Systems2020，6，4： | 1 |
| 8 | Diethyl phenylphosphonite contributing to solid electrolyte interphase and cathode electrolyte interphase for lithium metal batteries显示文摘Lithium metal batteries have obtained increasing interest due to their high specific capacity.Nonetheless,the growth of lithium dendrites brings safety risks to batteries and further deteriorates the performance.Herein,we explore diethyl phenylphosphonite(DEPP) as the electrolyte additive to alleviate this problem.DEPP can be preferentially decomposed than carbonate solvents to form the stable interface between electrolyte and lithium anode for inhibiting the dendrite growth.As expected,the symmetrical LiIILi cells could achieve a stable cycling performance with 200 h at 1 mA cm^(-2).Moreover,DEPP can be preferentially oxidized on the surface of lithium cobalt oxides(LiCoO_(2)) to form a dense cathode electrolyte interphase(CEI) film for suppressing the continuous oxidative decomposition of the electrolyte and eliminating the adverse effects of HF on the battery.This endows LiCoO_(2) IILi full battery with the enhanced cycling and rate performance. | Chunxia Miao Shihan Qi Kang Liang Yanli Qi Junda Huang Mingguang Wu Hongshun Zhao Jiandong Liu Yurong Ren Jianmin Ma | 2021 | Journal of Energy Chemistry2021，30，12： | 1 |
| 9 | Changes in firmness, pectin content and nanostructure of two crisp peach cultivars after storage显示文摘 | Lifen Zhang Fusheng Chen Hongshun Yang Xiaoyang Sun Hui Liu Xiangzhe Gong Chongbin Jiang Changhe Ding | 2009 | LWT - Food Science and Technology2009，，1： | 1 |
| 10 | Effects of heating modes and sources on nanostructure of gelatinized starch molecules using atomic force microscopy显示文摘 | Hongjie An Hongshun Yang Zhongdong Liu | 2008 | LWT - Food Science and Technology2008，41，8： | 1 |
| 11 | A method for detecting two-dimensional plane stress distribution in basin-type insulator based on critically refracted longitudinal wave显示文摘Basin-type insulator often has small cracks due to stress concentration.The current method cannot accurately reflect the stress condition of the insulator to find the stress concentration areas.To solve these problems,a method for detecting two-dimensional plane stress(δ_(1) andδ_(2))within different depth ranges in a basin-type insulator is proposed based on critically refracted longitudinal(LCR)wave.First,the acoustoelastic equation characterising the relationship between the variation of LCR wave propagation time and the plane stress was derived.Next,the propagation characteristics of LCR wave in epoxy resin samples were investigated.Then,the stress distribution within different depth ranges of the insulator subjected to hydraulic load was measured using the proposed method,including direction(θ),δ_(1) andδ_(2).The results show that the magnitude of the stress alone cannot accurately characterise the stress state.Points with equal distances to the centre have similar stress magnitudes,but their directions are not the same.With increasing depth,θremains essentially unchanged at the same location,whileδ1 andδ2 decrease,and the rate of decrease varies at different locations.Comparing the measured and simulated data,the results showed that they were in good agreement,and the maximum errors of stress value andθwere 0.69 MPa and 2.97°,respectively,which confirmed the feasibility and accuracy of the stress detection in the proposed method. | Zhaoyang Kang Fuqiang Ren Hongru Zhang Jingjing Yang Kaining Hou Qingquan Li Dongxin He Hongshun Liu Yongzhi Zhao Huaxin Wen | 2024 | High Voltage2024，9，1： | 0 |
| 12 | Contamination degree prediction of insulator surface based on exploratory factor analysis-least square support vector machine combined model显示文摘This study presents a combined model based on the exploratory factor analysis(EFA)and the least square support vector machine(LSSVM)to predict the contamination degree of insulator surface.Firstly,EFA method is utilised to reduce numerous influence factor variables of the insulator contamination into a few factor variables,which could decrease the complexity of the model.Then,regarding the above factor variables as new input variables,LSSVM model is established to predict the insulator contamination de-gree.In order to obtain the optimal predictive value,the non-dominated sorting genetic algorithm II is applied on the optimization of LSSVM model parameters.The proposed EFA-LSSVM combined model is compared with the models of LSSVM,back propa-gation neural network,and multiple linear regression on the model performance.Results indicate that the EFA-LSSVM combined model in this study effectively overcomes the shortcomings of the other three models mentioned above in computational time,pre-diction accuracy and generalization ability.Finally,the feasibility of the proposed model in predicting contamination degree of insulator surface is verified by adopting the radar map of the evaluation indexes of model performance. | Jiaxiang Sun Hongru Zhang Qingquan Li Hongshun Liu Xinbo Lu Kaining Hou | 2021 | High Voltage2021，6，2： | 0 |
| 13 | State space approach for joint estimation of activity and attenuation map from PET emission sinograms显示文摘放射性地图的量的评价为癌症的更好的诊断和理解有重要临床的含意。尽管变细地图和活动地图通常顺序被对待,当传播数据是失踪的时,他们能显然有益于很多。在这篇论文,我们建议同时从排放 sinograms 为变细地图和活动分发解决的一个新奇计划。我们的策略联合宠物,和变细参数的测量模型与已知的优先的统计被当作随机的变量。在到州的空间 representation' 的变换以后,过滤过程的扩大 Kalman 被采用线性化方程并且在近似最佳的意义提供联合估计。实验在两个合成数据上被执行了说明它的能力和好处。 | Liu Huafeng You Hongshun Shi Pengcheng | 2007 | Progress in Natural Science:Materials International2007，17，5： | 0 |
| 14 | Improved information entropy weighted vague support vector machine method for transformer fault diagnosis显示文摘A combined model based on improved information entropy and vague support vector machine(IVSVM)is introduced into transformer fault diagnosis using dissolved gas analysis in oil(DGA).The improved information entropy method is used to obtain the weights of each gas and to weight the raw data,and the processed training data and the corresponding fault types are inputted into the vague support vector machine(VSVM)model to obtain classifiers.Firstly,the training data are weighted by the improved information entropy method to discretise the original data from the mixed state for subsequent classifier training.Then,the vague set divides the events into true,false and unknown factors,which can optimise the sub-interface of SVM and improve the accuracy of the boundary point clas-sification.Finally,fault data from the literature and actual collections are selected for training and testing.By comparing with the widely used ratio method and artificial intelligence method,it can be concluded that the method described herein can effectively improve the accuracy of fault diagnosis.The result shows that this method has better applicability when facing actual fault type classification with higher data similarity. | Hongru Zhang Jiaxiang Sun Kaining Hou Qingquan Li Hongshun Liu | 2022 | High Voltage2022，7，3： | 0 |
| 15 | Food-Borne Poisoning Accident from Amanitin Toxin in Wild Mushrooms—Xingtai City,Hebei Province,China,2023显示文摘Summary What is already known about this topic?Fatal poisonings caused by wild mushrooms containing amanita toxins pose a significant threat in the southern regions of China.These toxins primarily induce gastrointestinal symptoms initially,which are then followed by potentially life-threatening acute liver damage.What is added by this report?This report contributes to the existing knowledge on these cases of poisoning by documenting the second occurrences in Hebei Province and the first occurrences in Xingtai City.Five individuals reported consuming wild mushrooms from the same origin,and laboratory tests confirmed the presence ofα-amanitin in their blood samples.What are the implications for public health practice?This underscores the risk associated with the collection and consumption of amanita toxin-containing mushrooms in Hebei.It is important to note that the identification of toxic and non-toxic mushrooms should not solely rely on personal experience or appearance. | Baopu Lv Liang Liu Hao Xiao Qingbing Meng Rui Zhang Yaqing An Yingli Jin Yu Ma Hengbo Gao Yongkai Li Qian He Yutao Zhang Changqing Liu Xiaoyan Luo Xiaomin Xu Fenshuang Zheng Yingping Tian Hongshun Zhang Dongqi Yao | 2024 | China CDC weekly2024，6，3： | 0 |
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