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Synergistic Promotion of Electrical, Mechanical and Thermal Properties for Silicone Rubber-based Field Grading Material via Compound Modification

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 337-350页

作者： Jiale Wu Yangzhi Gong Peiqi Xiong Zexi Xing Xiaofeng Xue Xiao Yang Boyang Shen Xingming bian State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University102206 BeijingChina State Grid Fuzhou Electric Power Supply Company Fuzhou 350009Fujian ProvinceChina Electrical Engineering Division University of CambridgeCambridge CB30FAUK

Use of nonlinearconductive SiC/silicone rubber(SR)field grading material(FGM)can improve the local field concentration of composite *** large volume fraction and large-size SiC particles(SiCp)into SR can obtain a good field grading effect,but it is accompanied by the deterioration of mechanical *** SiC with different shapes can solve this *** incorporating one-dimensional SiC whiskers(SiCw)to synergize with granular SiCp,SiC/SR FGM with better field-dependent conductivity,mechanical properties and thermal conductivity than large-size SiCp and large volume fraction filling case can be obtained by using smaller size SiCp and lower filling *** simulations of 500 kv line insulators show that the modified SiC/SR FGM can reduce the maximum field strength along the insulator surface and at sheath-core rod interfaces by 55%and 71.4%,*** combined application of FGM and grading ring can achieve a complementary *** FGM to partially replace the role of the grading rings,the field strength indicators can still meet the operational requirements after the tube radius and shielding depth of the grading rings at both ends are reduced by 36.2%and 40%separately,which is a benefit to alleviating the problems of high weight and large volume faced by traditional field grading methods.

关键词： Compound modification electric field regulation field grading material field-dependent conductivity mechanical properties thermal conductivity

Source-Load Coordinated Optimal Scheduling Considering the High Energy Load of Electrofused Magnesium and Wind Power Uncertainty

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Energy Engineering 2024年第10期121卷 2777-2795页

作者： Juan Li Tingting Xu Yi Gu Chuang Liu Guiping Zhou Guoliang bian School of Electrical Engineering Northeast Electric Power UniversityJilin132013China Ministry of Science and Technology Communication State Grid Liaoning Electric Power Co.Ltd.Shenyang110000China

In fossil energy pollution is serious and the“double carbon”goal is being promoted,as a symbol of fresh energy in the electrical system,solar and wind power have an increasing installed capacity,only conventional units obviously can not solve the new energy as the main body of the scheduling *** enhance the systemscheduling ability,based on the participation of thermal power units,incorporate the high energy-carrying load of electro-melting magnesiuminto the regulation object,and consider the effects on the wind unpredictability of the ***,the operating characteristics of high energy load and wind power are analyzed,and the principle of the participation of electrofusedmagnesiumhigh energy-carrying loads in the elimination of obstructedwind power is ***,a two-layer optimization model is suggested,with the objective function being the largest amount of wind power consumed and the lowest possible cost of system *** the upper model,the high energy-carrying load regulates the blocked wind power,and in the lower model,the second-order cone approximation algorithm is used to solve the optimizationmodelwithwind power uncertainty,so that a two-layer optimizationmodel that takes into account the regulation of the high energy-carrying load of the electrofused magnesium and the uncertainty of the wind power is ***,the model is solved using Gurobi,and the results of the simulation demonstrate that the suggested model may successfully lower wind abandonment,lower system operation costs,increase the accuracy of day-ahead scheduling,and lower the final product error of the thermal electricity unit.

关键词： High energy load of electrofused magnesium wind energy consumption thermal power unit wind power uncertainty two-layer optimization

Total process of fault diagnosis for wind turbine gearbox,from the perspective of combination with feature extraction and machine learning:A review

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Energy and AI 2024年第1期15卷 356-373页

作者： Xinhua Xu Xinyu Huang Haibin bian Jiani Wu Chen Liang Feiyun Cong Huadian(Ningxia)Energy Co.Ltd.New Energy Branch No.55Xihu StreetNingchuan 750016China State Key Laboratory of Fluid Power&Mechatronic System Zhejiang UniversityZhejiangHangzhou 310027China Huadian Zhengzhou Machinery Design&Research Institute Co.Ltd. No.28Huxinhuandao RdZhengzhou 450046China

With the increasing of the installed capacity of wind power,the condition monitoring and maintains technique is becoming more *** Turbines(WT)gearbox is one of the key wind power components as it plays the role of power transmission and speed *** this,a number of scholars have pay attention to the fault diagnosis of WT *** efficiency of Machine Learning(ML)algorithms is highly correlated with signal type,data quality,and extracted features *** implementation of ML techniques has proven to be advantageous in simplifying the comprehension prerequisites for fault diagnosis technology concerning fault *** and more current studies predominantly concentrate on the utilization and fine-tuning of ML algorithms,while providing limited insights into the features of the acquired ***,it is necessary to review the research in recent years from the perspective of the combination of feature extraction and ML algorithms,and provide a detailed direction for future WT gearbox fault diagnosis technology *** this paper,data processing algorithms and typical fault diagnosis methods based on ML methods for WT gearbox are *** the using of ML method in WT gearbox fault diagnosis,the data prepared for training is very *** paper firstly reviewed the data analysing method which will support the ML *** data analysing methods include data acquisition,data preprocessing and feature extraction *** extraction plays a pivotal role in the realm of gearbox fault diagnosis,as it serves as the essence of effective *** review will primarily focus on exploring methods that enable the utilization of efficient features in combination with ML techniques to achieve accurate gearbox fault *** typical ML method for WT gearbox fault diagnosis are carefully ***,some prospects for future research directions are discussed in the end.

关键词： Wind turbine gearbox Machine learning Fault diagnosis Artificial neural network

A comprehensive analysis of formation conditions,intrinsic properties,and mechanical responses of gas hydrate-bearing sediments

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Rock Mechanics Bulletin

Rock Mechanics Bulletin 2024年第2期3卷 39-62页

作者： Hualin Zhang Hanbing bian Shuangxing Qi Jijing Wang Univ.Lille IMT Lille DouaiUniv.ArtoisJUNIAULR 4515-LGCgELaboratoire de Genie Civil et Geo-EnvironnementF-59000LilleFrance China National Chemical Southern Construction&Investment(Jiangxi)Co. LtdGanzhou 341499JiangxiChina School of Traffic&Transportation Engineering Changsha University of Science&TechnologyChangsha 410114HunanChina

Natural gas hydrates(NGH)stored in submarine deposits are a promising energy resource,Yet,the deterioration in sediment strength can trigger geological disasters due to drilling-induced hydrate ***,an in-depth investigation on geo physical-mechanical performance of gas hydrate-bearing sediments(GHBS)is crucial for recovery hydrates safely and *** paper provides a comprehensive assessment of the research progress on formation conditions,intrinsic properties,and mechanical responses of *** key findings have been presented:gas composition,inhibitors and promoters alter hydrate formation by modifying the thermodynamic equilibrium of temperature and ***,we identified the key determinants of porosity of GHBS and revealed the correlation between permeability,hydrate saturation,and hydrate ***,we highlighted the differences in mechanical behavior between hydrate-free sediments and GHBS along with their underlying ***,we examined the methods for GHBS preparation as well as the employed test apparatuses,providing critical insights into the limitations and *** synthe-sizing data from existing literature,we conducted a comprehensive analysis of the dependence of mechanical parameters of GHBS on factors such as hydrate saturation,effective confining stress,and temperature,and dis-cussed the mechanical responses subjected to various hydrate dissociation ***,we offer a perspective for future research to focus on the micro-scale aspects,heterogeneous distribution,and long-term stability of *** discerned patterns and mechanical mechanisms are expected to guide the improvement of predictive model for geo physical-mechanical behavior of GHBS and establish a reference for developing effective strategies for recovery hydrates.

关键词： Gas hydrate-bearing sediments Hydrate formation and dissociation Hydrate morphology Geo physical-mechanical performance Recovery hydrates

长江中下游成矿带铜多金属矿床中灰泥丘的发现及其意义——以武山和冬瓜山铜矿为例

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地质学报 2011年第5期85卷 744-756页

作者：蒋少涌丁清峰杨水源朱志勇孙明志孙岩边立曾南京大学地球科学与工程学院内生金属矿床成矿机制研究国家重点实验室南京210093 吉林大学地球科学学院长春130061

通过对长江中下游成矿带中武山铜矿和冬瓜山铜矿层状硫化物矿体的详细研究,发现了大量具有层圈状构造、层纹状构造或不规则同心环状构造的矿石。在前人研究基础上,经光薄片鉴定、扫描电镜观察和碳氧同位素分析等,认为这类矿石在宏观构... 详细信息

通过对长江中下游成矿带中武山铜矿和冬瓜山铜矿层状硫化物矿体的详细研究,发现了大量具有层圈状构造、层纹状构造或不规则同心环状构造的矿石。在前人研究基础上,经光薄片鉴定、扫描电镜观察和碳氧同位素分析等,认为这类矿石在宏观构造上显示出类似于灰泥丘的孔洞系统,微观上又发现了细菌等微生物结构,判断其属于一种矿化的灰泥丘。资料显示,灰泥丘产出的环境为陆坡相,水深明显大于台地相,并且灰泥丘与热水喷流沉积成矿作用关系密切,在国内外许多热水喷流沉积成因矿床中均发现有灰泥丘。本文所研究的两个矿床中灰泥丘构造矿石保存状况略有不同,冬瓜山铜矿灰泥丘构造矿石保留了大量显示原生热水喷流沉积成因的组构、并发现细菌等微生物结构,碳-氧同位素组成也显示原始沉积特征;而武山铜矿灰泥丘构造矿石则显示出受热液改造的矿石组构和碳-氧同位素组成特征,暂未发现细菌等微生物结构。冬瓜山和武山铜矿灰泥丘构造矿石的发现,有力地佐证了长江中下游成矿带在海西期曾发生过热水喷流沉积成矿作用。

关键词：长江中下游武山铜矿冬瓜山铜矿灰泥丘热水喷流沉积成矿

维普期刊数据库

Design and Implementation of NOMA Backscatter Communication with Low-Precision Oscillators

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Journal of Communications and Information Networks 2024年第3期9卷 286-295页

作者： Kun Zhang Zhongye Cao Huixin Dong Zhiqing Luo Luanjian bian Wei Wang School of Electronic Information and Communications Huazhong University of Science and TechnologyWuhan 430074China ZTE Corporation Shenzhen 518057China

Recent years have witnessed increasing demands for the large-scale deployment of Internetof-things(IoT)*** technologies are promising to meet these demands with the notable low power consumption and ***,the conventional designs of backscatter prioritize energy efficiency at the cost of multiple access schemes with low spectral efficiency,which hinders its large-scale *** this paper,we propose a new non-orthogonal multiple access backscatter(NOMA-Backscatter)system to meet high spectral-efficiency *** implement the NOMA-Backscatter system for the first time with resource-constrained low-cost and low-power hardware and eliminate the affects of unstable oscillators during the successive interference cancellation(SIC)demodulation process in real *** demonstrate that NOMA-Backscatter can achieve 1.38 Mbit/s throughput with 200%tag load,and the spectral efficiency is 1.73×higher than state-of-the-art backscatter systems.

关键词： backscatter communication NOMA spectral efficiency multiple access

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塔里木盆地奥陶系偏腐殖型烃源岩的发现

天然气工业 1998年第5期18卷 32-36页

作者：赵孟军张宝民肖中尧李梅彭燕边立曾塔里木石油勘探开发指挥部勘探研究中心南京大学地球科学系

传统观点认为由于奥陶系没有陆生高等植物出现，故而不会出现腐殖型有机质。首次在塔里木盆地塔中北斜坡中、上奥陶统泥灰质烃源中发现了类似于腐殖型有机质的海相偏腐殖型烃源岩。生物学、有机岩石学及核磁共振分析表明，奥陶系偏腐殖... 详细信息

传统观点认为由于奥陶系没有陆生高等植物出现，故而不会出现腐殖型有机质。首次在塔里木盆地塔中北斜坡中、上奥陶统泥灰质烃源中发现了类似于腐殖型有机质的海相偏腐殖型烃源岩。生物学、有机岩石学及核磁共振分析表明，奥陶系偏腐殖型烃源岩以宏观藻为主要生烃母质，其产物主要为凝析油和天然气。该类烃源岩主要是发育在灰泥丘沉积模式的丘间洼地和层状生物灰泥丘沉积亚相中的泥质灰岩类。该类烃源岩及其产物具有独特的生物标志化合物特征：较高的姥植比值、三环萜烷中低碳数部分含量较高及丰富的重排甾烷等。由该类烃源岩所生成的天然气的地化特征也较为特殊：较高的氮气含量、偏轻的甲烷碳同位素值和较高的干燥系数等。由于具较高的有机质丰度和生烃潜力，故该类烃源岩是塔中地区重要的气源岩。

关键词：奥陶纪腐殖质烃源岩干酪根盆地油气藏

维普期刊数据库

Heterogeneous integration of 2D materials on Si charge-coupled devices as optical memory

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Science China(Information Sciences) 2024年第6期67卷 190-197页

作者： Zheng bian Feng TIAN Zongwen LI Xiangwei SU Tianjiao ZHANG Jialei MIAO Bin YU Yang XU Yuda ZHAO College of Integrated Circuits Hangzhou Global Scientific and Technological Innovation CentreZhejiang University

Optical memory integrates the function of optical sensing in memory devices, remarkably promoting the interconnection between sensory and memory terminals. Silicon charge-coupled photodetectors and floating gate memory have been widely used in imaging and storage technologies, respectively. However,the heterogeneous integration of the two devices requires technological innovation and complex electrical connections. In this work, we adopt a three-dimensional layer stacking method to design a novel optical memory device. On the top of Si charge-coupled photodetectors, we successively deposit two-dimensional graphene,hexagonal boron nitride, and molybdenum disulfide as a floating gate layer, a tunneling layer, and a readout layer, respectively. By applying a gate bias on lightly doped Si, a deep depletion layer is formed with a high voltage potential drop. Under dark conditions, the depletion layer cannot be filled, and the electric field across the h-BN tunnel barrier is relatively small. Under light irradiation, the deep depletion layer is gradually filled, and the h-BN tunneling layer withstands the increasing electric field, resulting in charge storage in the floating gate layer. Based on this mechanism, the device exhibits a gate voltage-dependent operation mode, including an integrated optical sensing-memory mode and an electrically driven storage mode. Under moderate gate voltage, the device can effectively detect the optical information with varied intensity and store the optical information in the floating gate, displaying optically controlled memory characteristics. Our work demonstrates a compact device structure for optical memory and displays excellent optically controlled memory performance, which can be applied in artificial vision systems.

关键词： heterogeneous integration charge-coupled device floating gate optical memory molybdenum disulfide lightly doped silicon

A modified PVDF-HFP/PMMA crosslinked co-polymer for high-performance all-solid-state lithium metal batteries

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Particuology 2024年第10期93卷 203-210页

作者： Sijia Wang Liang He Mengting Wang Xingtong Guo Xiangyun Qiu Shoudong Xu Petr Senin Ting bian Tao Wei School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang212003China Power&Energy Storage System Research Center College of Mechanical and Electrical EngineeringQingdao UniversityQingdao266071China College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan030024China Institute of Mechanics and Power Engineering Ogarev Mordovia State UniversitySaransk430005Russia

For all-solid-state lithium batteries(ASSLBs),polymer-blended solid composite electrolytes(SCEs)have drawn wide interest owing to their significance in improving the interfacial solid-solid contacts and inhibiting the growth of lithium *** this work,SCEs based on PVDF-HFP/PMMA matrix containing MOFs(NH2-MIL-53(Al))and LiTFSI were designed and synthesized employing an easy solution casting *** synthesized samples were examined by XRD,SEM,EDS,and electrochemical *** was found that MPP-2 SCE not only has excellent ionic conductivity at 60℃ of 5.54×10^(−4) S cm^(−1),but also exhibits superior interfacial compatibility in Li||Li symmetric batteries,which can constantly cycle for about 800 h at 0.1 mA cm^(−2) with no *** assembled Li|MPP-2|LiFePO4 cell exhibited a first discharge specific capacity of up to 157.1 mAh g^(−1) at 60℃ and 0.2 *** work may help to further advance the progress of ASSLBs in the future.

关键词： NH_(2)-MIL-53(AI) All solid-state lithium batteries(ASSLBs) PMMA PVDF-HFP Solid composite electrolytes(SCEs)