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Optimized Deep Learning Model for Fire Semantic Segmentation

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Computers, Materials & Continua 2022年第9期72卷 4999-5013页

作者： Songbin Li peng Liu qiandong Yan Ruiling qian Institute of Acoustics Chinese Academy of SciencesBeijing100190China Loughborough University LoughboroughLE113TTUnited Kingdom

Recent convolutional neural networks(CNNs)based deep learning has significantly promoted fire *** fire detection methods can efficiently recognize and locate the ***,the accurate flame boundary and shape information is hard to obtain by them,which makes it difficult to conduct automated fire region analysis,prediction,and early *** this end,we propose a fire semantic segmentation method based on Global Position Guidance(GPG)and Multi-path explicit Edge information Interaction(MEI).Specifically,to solve the problem of local segmentation errors in low-level feature space,a top-down global position guidance module is used to restrain the offset of low-level ***,an MEI module is proposed to explicitly extract and utilize the edge information to refine the coarse fire segmentation *** compare the proposed method with existing advanced semantic segmentation and salient object detection *** results demonstrate that the proposed method achieves 94.1%,93.6%,94.6%,95.3%,and 95.9%Intersection over Union(IoU)on five test sets respectively which outperforms the suboptimal method by a large *** addition,in terms of accuracy,our approach also achieves the best score.

关键词： Fire semantic segmentation local segmentation errors global position guidance multi-path explicit edge information interaction feature fusion

THEORETICAL INVESTIGATION ON THE DYNAMIC PERFORMANCE OF CMUT FOR DESIGN OPTIMIZATION

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Acta Mechanica Solida Sinica 2013年第1期26卷 99-110页

作者： Ting Yu Wenchao Zhou peng Xu Fengqi Yu Qin qian Department of Integrated Electronics Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences The Chinese University of Hong Kong School of Civil Engineering and Mechanics Huazhong University of Sciences and Technology

Although many modeling approaches exist for analyzing the behavior of capacitive micro-machined ultrasonic transducers （CMUTs）, the relation equation between the design pa- rameters with input and output is still lacking. What there is can only be used to analyze the dynamic performance of CMUT indirectly and qualitatively, such as stiffness and sound pressure. A lumped-parameter theoretical model based on the dynamic theory is proposed in this paper. The relation equations between the design parameters with inputs and outputs are given. The results obtained by the proposed model agree well with those by finite element method （FEM） simulation. The dynamic and static behavior of CMUT can be clearly depicted, which is helpful for design and optimization iterations. This shows that the proposed model makes it easier to optimize the parameters of a CMUT with respect to output and bandwidth directly and to better understand the influence of each parameter.

关键词： CMUT dynamic theory finite element method

Fuel efficient model predictive control strategies for a group of connected vehicles incorporating vertical vibration

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Science China(Technological Sciences) 2017年第11期60卷 1732-1746页

作者： qian LiJun QIU LiHong CHEN peng ABDOLLAHI Zoleikha PISU Pierluigi Department of Vehicle Engineering Hefei University of Technology International Center for Automotive Research Clemson University

This paper presents a decentralized fuel efficient model predictive control(MPC) strategy for a group of connected vehicles incorporating vertical vibration. To capture the vehicle vibration dynamics, the dynamics of the suspension system is integrated with the longitudinal dynamics of the vehicle. Furthermore, a MPC framework with finite time horizon is formulated to calculate the optimal velocity profile that compromises fuel economy, mobility and ride comfort for every individual vehicle with the safety and physical constraints considered. In the MPC framework, the target velocity is calculated using signal phase and timing(SPAT)information to reduce the number of stoppage at red lights, and the vertical acceleration is calculated parallel to the calculation of the fuel consumption. The MPC optimal problem is solved with fast-MPC approach which enhances the computational efficiency via exploiting the structure of the control system and approximate methods. Simulation studies are conducted over different SPATs and connectivity penetration rates and the results validate the advantages of the proposed control architecture.

关键词： model predictive control connected vehicles fuel economy vertical vibration intelligent transportation system

Dynamics of arsenic in salt marsh sediments from Dongtan wetland of the Yangtze River estuary,China

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Journal of Environmental Sciences 2012年第12期24卷 2113-2121页

作者： Yongjie Wang Limin Zhou Xiangmin Zheng peng qian Yonghong Wu Department of Geography College of Resources and Environmental SciencesEast China Normal UniversityShanghai 200062China School of Geography Nantong UniversityNantong 226019China Department of Gography Minfiang UniversityFuzhou 350108China

The mobility and transformation of arsenic （As） in salt marsh sediments were investigated in Dongtan wetland of the Yangtze River estuary, China. As in surface water, pore water and the rhizosphere sediments were quantified. The microcosm incubation experiments were conducted during the flooding of the sediments to examine As dynamics that occurred during changing redox conditions. The concentrations of dissolved As in pore water （0.04--0.95 ixmol/L） were significantly greater than that in surface water （0.03-0.06 lunol/L）. Under anoxic conditions, the reactive As could be initially mobilized by the reductive dissolution of Fe（III）（hydr）oxides. Subsequently, most of the dissolved As was likely to be associated with secondary iron （hydr）oxide phases and remained in solid phases. The seasonal variability of acid volatile sulfide concentrations suggest the anoxic conditions are enhanced during summer by Spartina alterniflora compared to Phragmites australis and Scirpus mariqueter, causing a notable increase in As mobility. Generally, there was a typical variation in redox conditions with season in salt marsh sediments of Dongtan wetland, in which the dynamics of As mobility and transformation possibly were controlled by iron, and all of this could be significantly influenced by the rapid spread of S. alterniflora.

关键词： Arsenic iron (hydr)oxides salt marsh sediment Spartina alterniflora Yangtze River estuary

Backward doubly-stochastic differential equations with mean reflection

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Probability, Uncertainty and Quantitative Risk 2023年第4期8卷 417-444页

作者： Hongchao qian Jun peng School of Mathematics and Statistics Central South UniversityChangsha 410075China

In this paper,we study a class of mean-reflected backward doubly stochastic differential equations(MR-BDSDEs),where the constraint depends on the law of the solution and not on its *** existence and uniqueness of these solutions were *** penalization method plays an important *** also provided a probabilistic interpretation of the classical solutions of the mean-reflected stochastic partial differential equations(MR-SPDEs)in terms of MR-BDSDEs.

关键词： Mean reflection Backward doubly-stochastic differential equation Penalization Stochastic partial differential equations

Proteomic Analysis of Cucumber Defense Rresponses Induced by Propamocarb

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Journal of Integrative Agriculture 2013年第11期12卷 2022-2035页

作者： WU peng QIN Zhi-wei WU Tao ZHOU Xiu-yan XIN Ming GUO qian-qian College of Horticulture Northeast Agricultural University

Propamocarb is an agricultural chemical that has been widely used to protect cucumber plants from downy mildew. To understand the mechanisms of cucumber defense responses to propamocarb, we investigated the physiological and proteomic responses of the cucumber line D0351 with propamocarb application. We found that after treatment with propamocarb, the activities of detoxifying enzymes （glutathione reductase, GR; glutathione S-tramsferase, GST） and soluble sugar content of cucumber fruit were signiifcantly increased, but malonaldehyde （MDA） content was signiifcantly reduced. To identify components of propamocarb responsive signaling, we compared the high resolution two-dimensional gel electrophoresis （2-DE） protein proifles of control and propamocarb-treated fruits, and identiifed 18 differentially expressed （13 up-regulated and 5 down-regulated） proteins induced by propamocarb which were determined by matrix-assisted laser desorption/ionization time-of-lfight mass spectrometry （MALDI-TOF-MS）. The majority of the proteins had functions related to detoxication, energy and transport, protein biosynthesis, regulating reactions and defending against stresses. A real-time quantitative reverse transcriptional-polymerase chain reaction （qRT-PCR） was used to compare transcript and protein accumulation patterns for 18 candidate proteins, and the expression of 14 was consistent at both transcript and protein levels. The responses of cucumber proteome to propamocarb seemed complex; the identified proteins may play an important role in regulating adaptation activities following exposure to propamocarb. Data presented herein may shed light on understanding cucumber fruit defense responses under propamocarb treatment.

关键词： cucumber fungicide propamocarb proteomics qRT-PCR

Salt tolerance of transgenic rice (Oryza sativa L.) with mtlD gene and gutD gene

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Chinese Science Bulletin 2000年第18期45卷 1685-1690页

作者： WANG Huizhong HUANG Danian LU Ruifang LIU Junjun qian qian peng Xuexian Department of Biology Hangzhou Teacher’s CollegeHangzhou 310012China China National Rice Research Institute Hangzhou 310006China Institute of Microbiology Chinese Academy of SciencesBeijing 100080China

Southern blot analysis indicated that mtID gene (encoding mannitol-1 -phosphate dehydrogenase) and gutD gene (encoding glucitol-6-phosphate dehydrogenase) had been integrated into the rice genome mediated by Agrobacterium tumefaciens LBA4404(pBIGM). The expression of the above two genes in transgenic rice plants was demonstrated by Northern blot analysis and enzymatic activity assay. Analysis of sugar alcohol showed that transgenic rice plants could produce and accumulate mannitol and sorbitol. The salt tolerance of transgenic plants was much higher than that of their controls.

关键词： Oryza sativa L. Agrobacterium tumefaciens D-mannitol-1-phosphate dehydrogenase D-glucitol-6-phosphate dehydrogenase salt tolerance.

COVID-19 pandemic changed the management and outcomes of acute appendicitis in northern Beijing:A single-center study

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World Journal of Clinical Cases 2022年第3期10卷 820-829页

作者： peng Zhang qian Zhang Hong-Wei Zhao Department of Gastrointestinal Surgery Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijing 102218China

BACKGROUND Since the outbreak of the coronavirus disease 2019(COVID-19)pandemic,outcomes and management of many diseases have been *** appendicitis is a common acute *** incidence rate is 0.05%-0.5%.Studies reported that the number of patients with appendicitis admitted to emergency department significantly decreased since the *** avoided going to the hospital for fear of being *** countries have different epidemic prevention measures that result in different treatment *** Chinese government also published some temporary measures in order to prevent the *** To explore the changes in management and outcomes of acute appendicitis during the COVID-19 pandemic in the North of *** Patients with acute appendicitis admitted to Beijing Tsinghua Changgung Hospital between February and June 2019 and February and June 2020 were retrospectively *** were grouped according to admission *** demographic characteristics,present illnesses,medical history,symptoms and signs,comorbidities,blood test results,imaging data,appendix pathology,and treatment details were *** Overall,74 patients received nonsurgical treatment and 113 patients underwent surgical treatment in group 2019,whereas 159 patients received nonsurgical treatment and 26 patients received surgical treatment in group ***,thick appendix,nonsurgical management,and uncomplicated appendicitis(simple or supportive appendicitis)were more common in group 2020(P<0.05).Among the nonsurgical management cases,the neutrophil percentage,neutrophil-tolymphocyte ratio,and recurrence rate were higher in group 2020(P<0.05).Among surgically managed cases,there were more cases with gastrointestinal symptoms,peritonitis,ascites in the image,and intraoperative adhesion or ascites in group 2020(P<0.05).The white blood cell count,time from diagnosis to surgery,surgical time,and intraoperative blood loss were higher in group 2020(P<0.0

关键词： COVID-19 Acute appendicitis Case management Treatment outcome Antibiotic treatment Laparoscopic appendectomy

Properties of color-flavor locked strange quark matter and strange stars in a new quark mass scaling

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Science China(Physics,Mechanics & Astronomy) 2013年第9期56卷 1730-1734页

作者： CHANG qian CHEN ShiWu peng GuangXiong XU JianFeng College of Physics University of Chinese Academy of Sciences Theoretical Physics Center for Science Facilities Institute of High Energy Physics

Considering the effect of one-gluon-exchange interaction between quarks,the color-flavor locked strange quark matter and strange stars are investigated in a new quark mass density-dependent *** is found that the color-flavor locked strange quark matter can be more stable if the one-gluon-exchange effect is *** lower density behavior of the sound velocity in this model is different from the previous ***,the new equation of state leads to a heavier acceptable maximum mass,supporting the recent observation of a compact star mass as large as about 2 times the solar mass.

关键词： color-flavor locked strange quark matter one-gluon-exchange effect