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Propagating subduction initiation of the Caroline Plate at the Mussau Trench

Science China Earth Sciences 2025年第1期68卷 253-269页

作者： Chun-Feng LI yongkang deng Tao WU Dongdong DONG Guoliang ZHANG Jiazheng ZHANG Yutao LIU Yaqing LI Fugui TANG Lulu ZHANG Department of Marine Sciences Zhejiang University Laboratory of Marine Mineral Resources Laoshan Laboratory Key Lab of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences Key Lab of Ocean and Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Science & Technology on Integrated Information System Lab Institute of Software Chinese Academy of Sciences

New seismic imaging from the Mussau Trench confirms that, under horizontal compression on an oceanic plate boundary, it is within the young and weak oceanic plate that a trench will develop, and it is the young plate, not so long after its birth, that starts to subduct toward the old plate. The Mesozoic Pacific Plate cannot easily bend, under the joint horizontal compression and vertical gravity pull, even with a pre-existing weak zone in place and with a large age offset across the plate boundary. The bending of the Caroline Plate near the northern end of the Mussau Trench started only after a long-time span of trench migration, and/or after a prolonged transition from initial compression to trench development. Highly contrasting trench deformation and sedimentary accretion between two parallel seismic sections support an evident migration of underthrusting or significant longitudinal heterogeneity along the trench. The swift transition from underthrusting to non-thrusting can be explained by a counter-clockwise rotation of the Caroline Plate. That miniature accretionary wedges develop even before the subduction initiates imply strong compression and uplifting before the underthrusting can kick-start. Rotation of the Caroline Plate have been halted as the Mussau Trench is seismically rather quiet and the Lyra Trough to the east shows relaxational extension.

关键词： Mussau Trench Subduction initiation Seismic reflection Caroline Plate

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Characteristics of Large Earthquake Recurrence and Determination of Average Recurrence Interval Value

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Earthquake Research in China 2000年第1期14卷 90-100页

作者： Ran yongkang and deng QidongInstitute of Geology, China Seismological Bureau, Beijing 100029, China Institute of Geology China Seismological Bureau Beijing 100029 China

Paleoearthquakes in the Yanqing-Huailai basin and on the Haiyuan fault are studied in *** result indicates that the recurrence behavior of large earthquakes is of a wide *** earthquakes show the behavior characteristics of the activity of most faults,butthey are of different grades,the recurrence interval of large earthquakes is of staged nature,and the interaction between faults has effects on the recurrence sequence of large ***,when the recurrence behavior of large earthquakes is staged in time or when thegradation of characteristic earthquakes has led to a sharp difference in recurrence intervalbetween paleoearthquakes of different intensities,for estimating the large earthquake risk bythe deterministic method and time-dependent probabilistic method,it is necessary to calculatethe recurrence interval value separately for each specific stage or grade in order that theaverage recurrence interval values of different stages can be determined.

关键词： Paleoearthquake Earthquake recurrence Prediction of earthquake risk Recurrence interval

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Engine Misfire Fault Detection Based on the Channel Attention Convolutional Model

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Computers, Materials & Continua 2025年第1期82卷 843-862页

作者： Feifei Yu Yongxian Huang Guoyan Chen Xiaoqing Yang Canyi Du yongkang Gong School of Mechatronic Engineering Guangdong Polytechnic Normal UniversityGuangzhou510665China School of Automotive and Transportation Engineering Guangdong Polytechnic Normal UniversityGuangzhou510665China

To accurately diagnosemisfire faults in automotive engines,we propose a Channel Attention Convolutional Model,specifically the Squeeze-and-Excitation Networks(SENET),for classifying engine vibration signals and precisely pinpointing misfire *** the experiment,we established a total of 11 distinct states,encompassing the engine’s normal state,single-cylinder misfire faults,and dual-cylinder misfire faults for different *** collection was facilitated by a highly sensitive acceleration signal collector with a high sampling rate of 20,*** collected data were methodically divided into training and testing sets based on different experimental groups to ensure generalization and prevent overlap between the two *** results revealed that,with a vibration acceleration sequence of 1000 time steps(approximately 50 ms)as input,the SENET model achieved a misfire fault detection accuracy of 99.8%.For comparison,we also trained and tested several commonly used models,including Long Short-Term Memory(LSTM),Transformer,and Multi-Scale Residual Networks(MSRESNET),yielding accuracy rates of 84%,79%,and 95%,*** underscores the superior accuracy of the SENET model in detecting engine misfire faults compared to other ***,the F1 scores for each type of recognition in the SENET model surpassed 0.98,outperforming the baseline *** analysis indicated that the misclassified samples in the LSTM and Transformer models’predictions were primarily due to intra-class misidentifications between single-cylinder and dual-cylinder misfire *** delve deeper,we conducted a visual analysis of the features extracted by the LSTM and SENET models using T-distributed Stochastic Neighbor Embedding(T-SNE)*** findings revealed that,in the LSTMmodel,data points of the same type tended to cluster together with significant ***,in the SENET model,data points of various types were more widely and evenly dispersed,demonstra

关键词： Channel attention SENET model engine misfire fault fault detection

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贫数据中基于模型自训练的空气处理设备故障诊断

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同济大学学报（自然科学版） 2024年第3期52卷 454-461页

作者：孟华裴迪阮应君钱凡悦邓永康郑铭桦同济大学机械与能源工程学院上海201804

针对空气处理设备(AHU)故障贫数据,基于深度置信网络(DBN)模型对4种特征选择算法进行对比研究,结果表明最大相关最小冗余算法的特征子集在诊断准确率及子集元素稳定性上表现最优。提出将DBN嵌入自训练框架的故障诊断模型,发现DBN自训练... 详细信息

针对空气处理设备(AHU)故障贫数据,基于深度置信网络(DBN)模型对4种特征选择算法进行对比研究,结果表明最大相关最小冗余算法的特征子集在诊断准确率及子集元素稳定性上表现最优。提出将DBN嵌入自训练框架的故障诊断模型,发现DBN自训练的诊断准确率较单纯DBN最高可提升19.5%。提出均匀抽样及按比例抽样2种自训练伪标签抽样策略,二者的诊断准确率均随抽样数减小而增大,在不同抽样数中的最大差异为3.42%;在所有贫数据样本中,均匀抽样策略始终优于按比例抽样,诊断准确率最大相差1.39%,表明在故障标签匮乏时,采用均匀抽样策略及较小的抽样数有利于提升DBN自训练的诊断性能。

关键词：故障检测与诊断空气处理设备贫数据特征选择深度置信网络自训练模型

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锅炉汽包与过热器压差大的原因分析及处理

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冶金动力 2015年第8期 54-56页

作者：邓永康李文学湖南涟源钢铁有限公司能源中心湖南娄底417009

涟钢一台150 t/h煤气锅炉因喷水减温器内弹簧片损坏,堵住两个蒸汽出口导致汽包与过热器压差增大,对此进行了原因分析,提出了处理措施,总结了处理此类故障的经验。

关键词：锅炉汽包过热器喷水减温器

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引气剂品种对混凝土性能的影响

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新型建筑材料 2017年第11期44卷 25-27,34页

作者：马丽涛宋宝乔琼琼苏方胡春梦邓永康安徽鑫固环保股份有限公司安徽宿州234000 常州工程职业技术学院江苏常州213164

通过对比三萜皂苷(液体)、十二烷基苯磺酸钠、十二烷基硫酸钠(K12)1%水溶液浓度的起泡高度、稳泡时间、气泡形态,研究3种引气剂掺入混凝土后对新拌混凝土性能及硬化后混凝土性能的影响。为引气剂在实际生产应用中提供技术参考。

关键词：引气剂电通量混凝土应用

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西太平洋地球动力学问题与未来大洋钻探目标

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地球科学 2021年第3期46卷 759-769页

作者：李春峰周多李刚李志康邓永康刘文潇温永林陆哲哲章露露李珂迪浙江大学海洋科学系浙江舟山316021

西太平洋区域是全球地质构造和海陆相互作用最活动的区域,经过50多年的大洋钻探研究,人们对西太平洋弧后海底扩张成因、俯冲工厂的动力学机制、地幔演化过程、发震带、热点岩浆活动、沉积古环境等都有了深入研究和分析,但是西太平洋边... 详细信息

西太平洋区域是全球地质构造和海陆相互作用最活动的区域,经过50多年的大洋钻探研究,人们对西太平洋弧后海底扩张成因、俯冲工厂的动力学机制、地幔演化过程、发震带、热点岩浆活动、沉积古环境等都有了深入研究和分析,但是西太平洋边缘海盆具有很大的构造多样性和复杂性,仍然有很多的科学目标和科学问题有待进一步开展研究.本文详细分析了边缘海盆的大洋岩石圈演化特殊性,原位上地幔蛇纹岩化的程度,初始俯冲与初始扩张的形成机制,海台、海山、海岭、洋脊、洋隆的属性,洋中脊水热循环活动的强度及其对大洋岩石圈演化的影响,岩石圈共轭张裂与破裂模式与机制,大洋红层与异常沉积这7个方面的科学问题,并建议就流体地球化学剖面、海山岩浆剖面、穆绍海沟与加瓜海脊、Ayu海槽、卡罗琳海岭系统、Eauripik海岭、冲绳海槽、莫霍面这8个关键具体目标开展详细的地球物理刻画并提出具有全球意义的钻探建议,为今后实现中国领导的全球大洋钻探工作提供思路.

关键词：西太平洋大洋钻探科学问题钻探目标地幔蛇纹岩化初始俯冲大洋红层海洋地质

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History,status and trend about the research of paleoseismology

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Chinese Science Bulletin 1999年第10期44卷 880-889页

作者： yongkang Ran Qidong deng Seismol Bur China Inst Geol Beijing 100029 Peoples R China

Paleoseismology was originated in the late nineteen century, but the modern paleoseismology formed at the end of the 1970s. Three stages (appearance, development and maturity) can be identified for paleoseismology in China. Great progress has been made in the aspects of trench technology, recognition signs, dating method and theoretical model, however,they are not developed to such a level at which the highly reliable data can be provided for the probability prediction of earthquakes. The main questions further concerned in the future include the study of geological evidence, chronology and displacement, the theoretical model about reliability, paleoearthquake feature in the region and large-earthquake reoccurrence, and new branches related with the paleoseismology in the stable continent region, usage of new technology and frontier sciences.

关键词： paleoseismology history development and questions trends.

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Effects of Dynamic Vegetation on Global Climate Simulation Using the NCEP GFS and SSiB4/TRIFFID

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Journal of Meteorological Research 2021年第6期35卷 1041-1056页

作者： Zhengqiu ZHANG yongkang XUE Panmao ZHAI Huiping deng Chinese Academy of Meteorological Sciences China Meteorological AdministrationBeijing 100081China University of California Los AngelesCA 90095USA Liaocheng University Liaocheng 252059China

Two global experiments were carried out to investigate the effects of dynamic vegetation processes on numerical climate simulations from 1948 to *** NCEP Global Forecast System(GFS)was coupled with a biophysical model,the Simplified Simple Biosphere Model(SSi B)version 2(GFS/SSi B2),and it was also coupled with a biophysical and dynamic vegetation model,SSi B version 4/Top-down Representation of Interactive Foliage and Flora Including Dynamics(TRIFFID)(GFS/SSi B4/TRIFFID).The effects of dynamic vegetation processes on the simulation of precipitation,near-surface temperature,and the surface energy budget were identified on monthly and annual scales by assessing the GFS/SSi B4/TRIFFID and GFS/SSi B2 results against the satellite-derived leaf area index(LAI)and albedo and the observed land surface temperature and *** results show that compared with the GFS/SSiB2 model,the temporal correlation coefficients between the globally averaged monthly simulated LAI and the Global Inventory Monitoring and Modeling System(GIMMS)/Global Land Surface Satellite(GLASS)LAI in the GFS/SSi B4/TRIFFID simulation increased from 0.31/0.29(SSiB2)to 0.47/0.46(SSiB4).The correlation coefficients between the simulated and observed monthly mean near-surface air temperature increased from 0.50(Africa),0.35(Southeast Asia),and 0.39(South America)to 0.56,0.41,and 0.44,*** correlation coefficients between the simulated and observed monthly mean precipitation increased from 0.19(Africa),0.22(South Asia),and 0.22(East Asia)to 0.25,0.27,and 0.28,*** greatest improvement occurred over arid and semiarid *** spatiotemporal variability and changes in vegetation and ground surface albedo modeled by the GFS with a dynamic vegetation model were more consistent with the *** dynamic vegetation processes contributed to the surface energy and water balance and in turn,improved the annual variations in the simulated regional temperature and precipita

关键词： NCEP Global Forecast System(GFS) Simplified Simple Biosphere Model version 4/Top-down Representation of Interactive Foliage and Flora Including Dynamics(SSiB4/TRIFFID) global climate simulation effects of dynamic vegetation

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凝汽器水环式真空泵工作液冷却系统的优化改造

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冶金动力 2020年第1期 42-46页

作者：林万安宋澜波张卫付岳峰邓永康湖南华菱涟源钢铁有限公司能源总厂

凝汽器真空系统对于电厂运行非常重要,直接影响电厂的经济性和系统运行的稳定性。夏季高温季节,循环冷却水系统运行压力较大,冷却能力受到一定制约,导致真空泵工作液温度长期超温运行,从而影响真空泵的抽吸能力和汽机真空。研究了真空... 详细信息

凝汽器真空系统对于电厂运行非常重要,直接影响电厂的经济性和系统运行的稳定性。夏季高温季节,循环冷却水系统运行压力较大,冷却能力受到一定制约,导致真空泵工作液温度长期超温运行,从而影响真空泵的抽吸能力和汽机真空。研究了真空泵工作液温度对汽轮机真空和发电负荷的影响,指导完成了冷却系统的优化改造,并对改造效果进行了试验评估,取得了较好的效果。

关键词：工作液温度真空冷却系统发电效率

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