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| 1 | Active velocity tomography for assessing rock burst hazards in a kilometer deep mine显示文摘Active velocity tomography was used to determine the stress state and rock burst hazards in a deep coal mine. The deepest longwall face, number 3207 in the Xingcun colliery, was the location of the field trials. The positive correlation between stress and seismic velocity was used to link the velocity data with stratum stresses. A GeoPen SE2404NT data acquisition system was used to collect seismic data from 300 g explosive charges fired by instantaneous electric detonator and located in the tail entry. The geophones were installed on the rock bolts in the head entry of LW3207. Velocity inversion shows an inhomogeneous distribution of stress in the longwall face that could not be obtained from theory or numerical simulations. Three abnormally high P-wave velocity regions were identified that were located on the corners of the two roadways and at the face end near the rail entry side. The maximum velocity gradient is located at the open cut off near the rail entry and is the area most dangerous for rock burst. Mining-induced tremors recorded by a micro-seismic monitoring system demonstrated that the position of energy release during mining coincides with the high velocity gradient area. This technology aids tech- nicians in the coal mine as they design measures to weaken or eliminate potential danger during subse- quent mining. | He Hu Dou Linming Li Xuwei Qiao Qiuqiu Chen Tongjun Gong Siyuan | 2011 | Mining Science and Technology2011，21，5： | 9 |
| 2 | Off-flavor compounds from decaying cyanobacterial blooms of Lake Taihu显示文摘The effect of cyanobacterial bloom decay on water quality and the complete degradation of cyanobacterial blooms in a short period were examined by an enclosure experiment in Gonghu Bay of Lake Taihu,China.Water quality parameters as well as taste and odor compounds during the breakdown of cyanobacterial blooms were measured.Results showed that the decay of cyanobacterial blooms caused anoxic water conditions,decreased pH,and increased nutrient loading to the lake water.The highest concentrations of dimethyl sulfide (DMS),dimethyl trisulfide (DMTS),and β-cyclocitral were observed in the anoxic water,at 62331.8,12413.3,and 1374.9 ng/L,respectively.2-Methylisoborneol was dominant during the live growth phase of cyanobacterial blooms,whereas DMS and DMTS were dominant during the decomposition phase.Dissolved oxygen,pH,and chlorophyll a were negatively correlated with DMS,DMTS,and β-cyclocitral,whereas total phosphorus,total nitrogen,and ammonium (NH4+-N) were positively correlated with DMS,DMTS,β-cyclocitral,and β-ionone.The experimental results suggested that preventing the anaerobic decomposition of cyanobacterial blooms is an important strategy against the recurrence of a malodor crisis in Lake Taihu. | Zhimei Ma Yuan Niu Ping Xie Jun Chen Min Tao Xuwei Deng | 2013 | Journal of Environmental Sciences2013，25，3： | 9 |
| 3 | Relationship between biogeochemical features of biogenic elements and flocculation in the Changjiang Estuary显示文摘RelationshipbetweenbiogeochemicalfeaturesofbiogenicelementsandflocculationintheChangjiangEstuary￥LinYi'an;TangRenyou;LiYan;Do... | Lin Yi’an Tang Renyou Li Yan Dong Henglin Guan Xuwei and Chen Yinzu (Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China Shanghai Survey and Designing Institute of Ministry of Energy and Ministry of Water Resources, | 1995 | Acta Oceanologica Sinica1995，14，2： | 3 |
| 4 | OVERVIEW OF SEVERE TYPHOON FITOW AND ITS OPERATIONAL FORECASTS显示文摘Severe typhoon Fitow(1323)brought persistent and heavy rainfall to Zhejiang and the Shanghai area after it made landfall at Fujian Province of China in October 2013,breaking the rainfall records of several counties and districts in Zhejiang.In this paper,we provide an overview of the characteristics of Fitow’s landfall,including its track,intensity,structural evolution,heavy rainfall,and wind.We also describe some of the associated disastrous impacts.Finally,we provide verifications of operational forecasts of its track,intensity and rainfall.Though the track and intensity is well predicted,the rainfall persistence and enhancement in the second stage in Shanghai and north Zhejiang areas are not predicted out at all.The analysis presented in this paper provides forecasters and researchers with some valuable information on Fitow,which could form a useful basis for further studies. | ZIFENG YU YANDIE CHEN DAN WU GUOMIN CHEN XUWEI BAO QIUZHEN YANG RUNLING YU LEI ZHANG JIE TANG MING XU ZHIHUA ZENG | 2014 | Tropical Cyclone Research and Review2014，3，1： | 2 |
| 5 | Nonfragile guaranteed cost control for Delta operator-formulated uncertain time-delay systems显示文摘With consideration that the controller parameters may vary from the designed value when the controller is realized, based on Lyapunov stability theory, a design method of nonfragile guaranteed cost control for a class of Delta operator-formulated uncertain time-delay systems is studied. A sufficient condition for the existence of the nonfragile guaranteed cost controller is given. A numeric example is then given to illustrate the effectiveness and the feasibility of the designed method. The results show that even if the parameters of the designed controller are of variations, the closed-loop system is still asymptotically stable and the super value of the cost function can also be obtained, while the closed-loop system will be unstable if the variations of the controller parameters are not considered when the controller is designed. The nonfragile guaranteed cost controller derived from the traditional shift operator method may cause the closed-loop system to be unstable, while the nonfragile guaranteed cost controller based on Delta operator method can avoid the unstable problem of the closed-loop system. | Ruiquan LIN, Silian CHEN, Xuwei DING (College of Electrical Engineering and Automation, Fuzhou University, Fuzhou Fujian 350108, China) | 2010 | 控制理论与应用(英文版)2010，8，2： | 2 |
| 6 | Real-time hand tracking based on YOLOv4 model and Kalman filter显示文摘Aiming at the shortcomings of current gesture tracking methods in accuracy and speed, based on deep learning You Only Look Once version 4(YOLOv4) model, a new YOLOv4 model combined with Kalman filter real-time hand tracking method was proposed. The new algorithm can address some problems existing in hand tracking technology such as detection speed, accuracy and stability. The convolutional neural network(CNN) model YOLOv4 is used to detect the target of current frame tracking and Kalman filter is applied to predict the next position and bounding box size of the target according to its current position. The detected target is tracked by comparing the estimated result with the detected target in the next frame and, finally, the real-time hand movement track is displayed. The experimental results validate the proposed algorithm with the overall success rate of 99.43% at speed of 41.822 frame/s, achieving superior results than other algorithms. | Du Xuwei Chen Dong Liu Huajiang Ma Zhaokun Yang Qianqian | 2021 | The Journal of China Universities of Posts and Telecommunications2021，28，3： | 2 |
| 7 | On the false alarm of planar K -function when analyzing urban crime distributed along streets显示文摘 | Yongmei Lu Xuwei Chen | 2006 | Social Science Research2006，，2： | 1 |
| 8 | Eco-chemical mechanisms govern phytoplankton emissions of dimethylsulfide in global surface waters显示文摘The anti-greenhouse gas dimethylsulfide(DMS)is mainly emitted by algae and accounts for more than half of the total natural flux of gaseous sulfur to the atmosphere,strongly reducing the solar radiation and thereby the temperature on Earth.However,the relationship between phytoplankton biomass and DMS emissions is debated and inconclusive.Our study presents field observations from 100 freshwater lakes,in concert with data of global ocean DMS emissions,showing that DMS and algal biomass show a hump-shaped relationship,i.e.DMS emissions to the atmosphere increase up to a p H of about 8.1 but,at higher p H,DMS concentrations decline,likely mainly due to decomposition.Our findings from lake and ocean ecosystems worldwide were corroborated in experimental studies.This novel finding allows assessments of more accurate global patterns of DMS emissions and advances our knowledge on the negative feedback regulation of phytoplankton-driven DMS emissions on climate. | Xuwei Deng Jun Chen Lars-Anders Hansson Xia Zhao Ping Xie | 2021 | National Science Review2021，8，2： | 1 |
| 9 | Simultaneous determination of eight common odors in water boby using automatic purge and trap coupled to gas chromatography with mass spectrometry 显示文摘 | Deng Xuwei Liang Gaodao Chen Jun | 2011 | J Chromatography A2011，，1218： | 1 |
| 10 | Novel biocompatible waterbomepolyurethane using L-lysine as an extender显示文摘 | Chen hong Jiang Xuwei | 2002 | Journal of Applied Polymerscience2002，13，5： | 1 |
| 11 | Surface assem bly of graphene oxide nanosheets on SiO2 particles for the selective isolation of hemoglobin显示文摘 | Liu Jiawei Zhang Qian Chen Xuwei | 2011 | Chem Eur J2011，17，17： | 1 |
| 12 | Microsimulation of Hurricane Evacuation Strategies of Galveston Island 显示文摘 | Xuwei Chen | 2008 | The Professional Geographer2008，60，2： | 1 |
| 13 | Agent-based modeling and simulation of urban evacuation: Relative effectiveness of simultaneous and evacuation strategies 显示文摘 | Xuwei Chen F Benjamin Zhan | 2008 | Journal of the Operational Research Society (S0160-5682)2008，59，1： | 1 |
| 14 | On the False Alarm of Planar K-Function when Analyzing Urban Crime Distributed Along Streets 显示文摘 | Lu Yongmei Chen Xuwei | 2007 | Social Science Re- search2007，36，2： | 1 |
| 15 | On the False Alarm of Planar K-function when Analyzing Urban CrimeDistributed Along Streets显示文摘 | Lu Yongmei Chen Xuwei | 2007 | Social Science Re- search2007，36，2： | 1 |
| 16 | Functionalization of MWNTs with hyperbranched PEI for highly selective isolation of BSA 显示文摘 | Chen Meiling Chen Xuwei Wang Jianhua | 2010 | Macromolecular Bioscience2010，10，8： | 1 |
| 17 | Simulta-neous determination of eight common odors in naturalwater body using automatic purge and trap coupled to gaschromatography with mass spectrometry 显示文摘 | Deng Xuwei Liang Gaodao Chen Jun | 2011 | Journal ofChromatography A2011，1218，24： | 1 |
| 18 | Simultaneous determination of eight common odors in natural water body using automatic purge and trap coupled to gas chromatography with mass spectrometry显示文摘 | DENG Xuwei LIANG Gaodao CHEN Jun | 2011 | J Chromatogr A2011，1218，24： | 1 |
| 19 | Novel biocompatible waterborne polyurethane using L-lysine as an extender显示文摘 | CHEN Hong JIANG Xuwei HE Lin | 2002 | Journal of Applied Polymer Science2002，84，13： | 1 |
| 20 | Isolation/separation of plasmid DNA u- sing hemoglobin modified magnetic nanocomposites as solid- phase adsorbent 显示文摘 | Chen Xuwei | 2012 | Talanta2012，100，： | 1 |
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