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Preliminary Results of the Seismicity Monitoring Experiment around the 2019 Mw5.4 Earthquake Epicenter in the Central South China Sea Basin

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Journal of Earth Science 2024年第1期35卷 212-220页

作者： Wenfei Gong Aiguo Ruan Xiongwei Niu Zhenjie Wang Pingchuan Tan Xiaodong Wei Wei Wang Zhengyi tong Liqun Cheng Fansheng Kong Shaoping Lu Jianke Fan weiwei Ding Jinyao Gao Chunguo Yang Jiabiao Li School of Oceanography Shanghai Jiaotong UniversityShanghai 200240China Key Laboratory of submarine Geosciences Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Zhejiang Earthquake Administration Hangzhou 310013China School of Earth Sciences Zhejiang UniversityHangzhou 310027China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China School of Earth Sciences and Engineering Sun Yat-sen UniversityZhuhai 519082China Institute of Oceanology Chinese Academy of SciencesQingdao 266071China

On September 5,2019,a moderate earthquake of Mw5.4 unexpectedly occurred in the apparently quiescent central basin of the South China *** immediately carried out a seismicity monitoring experiment around the epicenter by using broadband ocean bottom seismometers(OBS)for the following three scientific *** first is knowing the earthquake seismogenic mechanism,fault structure and further *** second is finding the role of the residual spreading ridge playing in earthquake processes and further revealing the deep structures of the ridge directional turning *** third is confirming the existence and significance of the so called“Zhongnan fault”.This paper reports the preliminary results of the first phase *** OBSs were deployed for seismicity monitoring with a duration of 288 days,but only three were ***-earthquakes were firstly detected by an automatic seismic phase picking algorithm and then were verified by analyzing their seismic phases and time-frequency characteristics in detail.A total of 21,68 and 89 microearthquakes were picked out from the three OBSs respectively within the distance of 30 *** dominant frequency of these micro-earthquakes is 12-15 Hz,indicating tectonic *** the first two months after the mainshock the seismicity was relatively stronger,and micro-earthquakes were still occurring occasionally till the end of observation,indicating the epicenter area is *** used Match&Locate method to locate 57 micro-earthquakes *** spatial distribution shows that the seismicity is developed mainly along the NE direction roughly parallel to the residual ridge with depth variations between 10-20 km.

关键词： South China Sea microseismic monitoring earthquakes fault broadband OBS

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Microbiome and metabolome dysbiosis analysis in impaired glucose tolerance for the prediction of progression to diabetes mellitus

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Journal of Genetics and Genomics 2024年第1期51卷 75-86页

作者： Boxun Zhang Xuan Zhang Zhen Luo Jixiang Ren Xiaotong Yu Haiyan Zhao Yitian Wang Wenhui Zhang weiwei Tian Xiuxiu Wei Qiyou Ding Haoyu Yang Zishan Jin Xiaolin tong Jun Wang Linhua Zhao Institute of Metabolic Diseases Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China Faculty of Biological Science and Technology Baotou Teacher's CollegeBaotouInner Mongolia 014030China CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China Infinitus(China)Company Ltd GuangzhouGuangdong 510405China Affiliated Hospital of Changchun University of Chinese Medicine ChangchunJilin 130021China Department of Endocrinology Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China Xinjiekou Community Health Service Center in Xicheng District Beijing 100035China Department of Spleen and Stomach Shenzhen Traditional Chinese Medicine HospitalShenzhenGuangdong 518033China University of Chinese Academy of Sciences Beijing 100049China Beijing University of Chinese Medicine Beijing 100105China Northeast Asia Institute of Traditional Chinese Medicine Changchun University of Chinese MedicineChangchunJilin 130117China

Gut microbiota and circulating metabolite dysbiosis predate important pathological changes in glucose metabolic disorders;however,comprehensive studies on impaired glucose tolerance(IGT),a diabetes mellitus(DM)precursor,are ***,we perform metagenomic sequencing and metabolomics on 47 pairs of individuals with IGT and newly diagnosed DM and 46 controls with normal glucose tolerance(NGT);patients with IGT are followed up after 4 years for progression to *** of baseline data reveals significant differences in gut microbiota and serum metabolites among the IGT,DM,and NGT *** addition,13 types of gut microbiota and 17 types of circulating metabolites showed significant differences at baseline before IGT progressed to DM,including higher levels of Eggerthella unclassified,Coprobacillus unclassified,Clostridium ramosum,L-valine,L-norleucine,and L-isoleucine,and lower levels of Eubacterium eligens,Bacteroides faecis,Lachnospiraceae bacterium 3_1_46FAA,Alistipes senegalensis,Megaspaera elsdenii,Clostridium perfringens,α-linolenic acid,10E,12Z-octadecadienoic acid,and dodecanoic acid.A random forest model based on differential intestinal microbiota and circulating metabolites can predict the progression from IGT to DM(AUC=0.87).These results suggest that microbiome and metabolome dysbiosis occur in individuals with IGT and have important predictive values and potential for intervention in preventing IGT from progressing to DM.

关键词： Impaired glucose tolerance Diabetes mellitus Gut microbiota Metabolomics

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Imidazole-Linked Fully Conjugated Covalent Organic Framework for High-Performance Sodium-Ion Battery

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CCS Chemistry 2024年第5期6卷 1255-1263页

作者： Lu Liu Yu Gong Yifan tong Hao Tian Xubo Wang Yiming Hu Shaofeng Huang weiwei Huang Sandeep Sharma Jingnan Cui Yinghua Jin Weitao Gong Wei Zhang State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024 Department of Chemistry University of Colorado BoulderBoulderColorado 80309 Hebei Key Laboratory of Applied Chemistry Yanshan UniversityQinhuangdao 066004

Covalent organic frameworks(COFs)have garnered increasing attention as promising electrode materials for sodium-ion batteries(SIBs)due to their ordered backbones,uniform pore sizes,and high surface ***,they also face challenges,including low capacity,unsatisfactory rate performance,and limited cycling stability,which pose the primary obstacles to their practical ***,a pyrenoimidazole-based COF,denoted as PyIm-COF,has been synthesized as a novel electrode material for highperformance SIBs using an efficient synthetic *** extended fully conjugated backbones and readily accessible redox-active sites,PyIm-COF demonstrates remarkable high-rate performance,delivering around 250 m Ah g^(−1)and excellent cycling stability,retaining 97.2%of its capacity even after 2500 cycles at 5 A g^(−1),which is higher than that of most previously reported COF-based *** work provides valuable insights into the development of nitrogen-rich conjugated COF electrode materials for rechargeable SIBs.

关键词： pyrenoimidazole fully conjugated backbones covalent organic framework electrode material sodium-ion battery

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Receiver function analysis for seismic structure of the crust and uppermost mantle in the Liupanshan area,China

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Science China Earth Sciences 2007年第Z2期50卷 227-233页

作者： tong weiwei WANG LiangShu MI Ning XU MingJie LI Hua YU DaYong LI Cheng LIU ShaoWen LIU Mian Eric SanDvol Department of Earth Sciences Nanjing UniversityNanjing 200093China Department of Earth SciencesNanjing UniversityNanjing 200093China Department of Geological Science University of MissouriColumbiaMO 65211USA

A portable broadband seismic array was deployed from the northeast Tibetan Plateau to the southwest Ordos block,*** seismic structure of the crust and uppermost mantle of the Liupanshan area is obtained using receiver function analysis of teleseismic body *** crustal thickness and Poisson's ratios are estimated by stacking the weighted amplitudes of receiver *** results reveal complex seismic phases in the Liupanshan area,implying intense deformation at the boundary between the Tibetan Plateau and the Ordos *** average crustal thickness is 51.5 km in the northeast Tibetan Plateau,53.5 km in the Liupan Mountain and 50 km in the southwest Ordos block,resulting in a concave Moho beneath the Liupan *** Poisson's ratio of the Liupanshan area varies between 0.27-0.29,higher than the value of 0.25-0.26 to the east and west of the Liupan Mountain,suggesting partial melting in the lower *** variance in Poisson's ratio across the Liupan Mountain indicates notable changes in the crustal composition and mechanical properties,which may be formed by the northeastward flow of the Tibetan lower crust during the India-Eurasia collision.

关键词： receiver function Liupan Mountain crustal structure Poisson's ratio India-Eurasia collision

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东亚引进FDI业绩和潜力分析

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辽宁师范大学学报（社会科学版） 2016年第6期39卷 18-23页

作者：佟伟伟辽宁大学国际关系学院辽宁沈阳110036 辽宁石油化工大学经济管理学院辽宁抚顺113001

东亚是当今世界经济发展中最具发展潜力的地区,同时也是深受世界FDI青睐的对象,其吸引的FDI呈逐年增长趋势。以东亚为研究对象,利用2009—2014年的有关数据,3年为一期对东亚国家(地区)引进FDI的业绩指数和潜力指数进行计算,并进行两个... 详细信息

东亚是当今世界经济发展中最具发展潜力的地区,同时也是深受世界FDI青睐的对象,其吸引的FDI呈逐年增长趋势。以东亚为研究对象,利用2009—2014年的有关数据,3年为一期对东亚国家(地区)引进FDI的业绩指数和潜力指数进行计算,并进行两个指数的综合分析,以深入评估东亚引进FDI的业绩和潜力,并为我国引进FDI提供具有前瞻性的建议,即实现FDI由量到质的转变,提高人口素质及科研投入,以便使FDI更好地为我国经济发展服务。

关键词：东亚 FDI 业绩潜力

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Untrained neural network for linear tomographic absorption spectroscopy

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Science China(Technological Sciences) 2024年第9期67卷 2787-2796页

作者： Chen JingRuo Xu ShiJie Liu HeCong Huang JianQing Liu YingZheng Cai weiwei Key Lab of Education Ministry for Power Machinery and Engineering School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China EMPI Institute for Energy and Materials Processes Reactive FluidsUniversity of Duisburg-EssenDuisburg 47048Germany Department of Electrical and Electronic Engineering The University of Hong KongHong Kong SARChina

Linear tomographic absorption spectroscopy(LTAS) is a non-destructive diagnostic technique widely employed for gas *** inverse problem of LTAS represents a classic example of an ill-posed problem. Linear iterative algorithms are commonly employed to address such problems, yielding generally poor reconstruction results due to the incapability to incorporate suitable prior conditions within the reconstruction process. Data-driven deep neural networks(DNN) have shown the potential to yield superior reconstruction results;however, they demand a substantial amount of measurement data that is challenging to *** surmount this limitation, we proposed an untrained neural network(UNN) to tackle the inverse problem of LTAS. In conjunction with an early-stopping method based on running variance, UNN achieves improved reconstruction accuracy without supplementary training data. Numerical studies are conducted to explore the optimal network architecture of UNN and to assess the reliability of the early-stopping method. A comparison between UNN and superiorized ART(SUP-ART) substantiates the exceptional performance of UNN.

关键词： absorption spectroscopy linear tomography untrained neural networks combustion diagnostics

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Self-derivation and reconstruction of silver nanoparticle reinforced cobalt-nickel bimetallic hydroxides through interface engineering for overall water splitting

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Journal of Energy Chemistry 2024年第3期90卷 590-599,I0013页

作者： Yan Li Jie Han weiwei Bao Junjun Zhang Taotao Ai Mameng Yang Chunming Yang Pengfei Zhang National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology School of Materials Science and EngineeringShaanxi University of TechnologyHanzhong 723000ShaanxiChina State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry&Chemical EngineeringNingxia UniversityYinchuan 750021NingxiaChina College of Chemistry&Chemical Engineering Yan’an UniversityYan’an 716000ShaanxiChina School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Designing efficient and long-lasting non-metal electrocatalysts is an urgent task for addressing the issue of kinetic hysteresis in electrochemical oxidation *** bimetallic hydroxides,catalyzing the oxygen evolution reaction(OER),have significant research potential because hydroxide reconstruction to generate an active phase is a remarkable ***,the complete reconstruction of ultrathin CoNi(OH)_(2) nanosheets was achieved by embedding Ag nanoparticles into the hydroxide to induce a spontaneous redox reaction(SRR),forming heterojunction Ag@CoNi(OH)_(2) for bifunctional *** calculations and in situ Raman and ex situ characterizations revealed that the inductive effect of the Ag cation redistributed the charge to promote phase transformation to highly activate Ag-modified *** Co-Ni dual sites in Co/NiOOH serve as novel active sites for optimizing the intermediates,thereby weakening the barrier formed by OOH^*.Ag@CoNi(OH)_(2) required a potential of 1.55 V to drive water splitting at a current density of 10 mA cm^(-2),with nearly 98.6% Faraday *** ion induction and triggering of electron regulation in the OER via the synergistic action of the heterogeneous interface and surface reconstruction,this strategic design can overcome the limited capacity of bimetallic hydroxides and bridge the gap between the basic theory and industrialization of water decomposition.

关键词： Surface reconstruction Bimetallic hydroxides Ag nanoparticle Operando Raman Overall water splitting

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基于焓-熵-㶲平衡的无盖板PV/T系统热力学分析与优化

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化工进展 2022年第4期41卷 1840-1847页

作者：马进伟方浩陈茜茜陈海飞童维维安徽建筑大学环境与能源工程学院安徽合肥230601 常州大学石油工程学院江苏常州213016

光伏全覆盖的无盖板光伏/热(PV/T)系统结构简单,电性能优异而热效率偏低,有关其能量损失的研究还少有涉及。本文基于热力学第一、第二定律分别建立无盖板PV/T的能量平衡方程,搭建实验平台开展系统在不同温度、流量工况下的性能测试,结... 详细信息

光伏全覆盖的无盖板光伏/热(PV/T)系统结构简单,电性能优异而热效率偏低,有关其能量损失的研究还少有涉及。本文基于热力学第一、第二定律分别建立无盖板PV/T的能量平衡方程,搭建实验平台开展系统在不同温度、流量工况下的性能测试,结合电池温度曲线验证工质的冷却效果,并从焓-熵-㶲的角度对系统的热力学特性进行分析。研究发现,水冷通道提升了光伏组件的效率和温度场的均匀性,同时缩短水集热过程的时间将有助于系统节能和增加能量收益;环境温度是影响PV/T系统热效率、热㶲效率以及热损失率的重要因素,电效率则受流量变化的影响更为明显。测试条件下,无盖板PV/T系统的电、热、综合效率的最大值分别为17.36%、25.37%、70.12%,较高的电效率保证了能量收集的品质,而热水收集温度可以通过调节流量大小以满足生活需求。增大流量能够提高PV/T系统的㶲效率,结合水泵运行的优化方案可进一步提升系统的经济性;系统熵增与㶲效率呈负相关性,随流量的增大呈降低的趋势。数据显示,流量0.06kg/s时PV/T的㶲效率达到最大值19.05%,对应的熵为最小值0.0191kW·h/K。

关键词：太阳能光伏/热焓熵㶲热力学能量损失

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行政管理体制改革与“报关实务”课程内容调整分析

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科教导刊 2018年第29期 119-120页

作者：童伟伟长江大学经济学院湖北荆州434023

本文梳理了近年来我国海关行政管理体制改革背景下所出台的一系列政策措施,以及由此引发的"报关实务"课程内容的相应调整,最后针对报关实务课程教学提出了几点建议。

关键词：行政管理体制改革报关实务内容调整

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无盖板型水冷式PV/T模块光电/光热综合性能实验研究

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太阳能学报 2022年第6期43卷 66-71页

作者：马进伟方浩陈茜茜童维维何伟高峰安徽建筑大学环境与能源工程学院合肥230601 合肥工业大学土木与水利工程学院合肥230009 合肥中南光电有限公司合肥231600 安徽省建筑设计研究总院股份有限公司合肥230000

无盖板PV/T组件相比于盖板式PV/T组件有更高的光电转换效率,在电能输出方面的优势明显。基于此,提出一种无盖板型水冷式PV/T模块,并搭建由光伏对比模块、水冷式PV/T模块以及无冷却水循环的PV/T对比模块构成的实验平台开展对比实验,研究... 详细信息

无盖板PV/T组件相比于盖板式PV/T组件有更高的光电转换效率,在电能输出方面的优势明显。基于此,提出一种无盖板型水冷式PV/T模块,并搭建由光伏对比模块、水冷式PV/T模块以及无冷却水循环的PV/T对比模块构成的实验平台开展对比实验,研究温度、流量对无盖板PV/T模块电、热转换效率的影响。结果表明,在水冷作用下,PV/T模块的光伏组件温度显著降低,与PV/T对比模块相比发电效率提升11.54%;环境平均温度为21.7℃、平均辐照度650 W/m的测试条件下,流量0.12 m/h时模块的电效率为17.44%,热效率为19.80%,综合效率达到65.69%,考虑到循环泵消耗的电能,表面积1.93 m的水冷式PV/T模块全天可存储有效能3.72 MJ。

关键词：太阳能光电转换效率热能 PV/T

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