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Preface to the Special Topic on Computer Mathematics

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Journal of Systems Science & Complexity 2023年第1期36卷 1-2页

作者： CHEN Shaoshi MOU chenqi KLMM Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Mathematical Sciences Beihang UniversityBeijing 100083China

This special topic on Computer Mathematics of Journal of Systems Science&Complexity is the collection of 8 excellent papers presented at the 12th Congress of Computer Mathematics of Chinese Mathematical Society held in Guilin,China during June 4–7,*** look back its successful convening now,this conference was truly a blessed one at the right timing,at the right place,and with the right people in the up-and-downs of COVID-19 epidemic.

关键词： Mathematical truly Preface

SST biases over the Northwest Pacific and possible causes in CMIP5 models

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Science China Earth Sciences 2018年第6期61卷 792-803页

作者： chenqi WANG Liwei ZOU Tianjun ZHOU LASG Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China University of Chinese Academy of Sciences Beijing 100049 China Jiangsu Collaborative Innovation Center for Climate Change Nanjing 210023 China

In this paper, the features and possible causes of sea surface temperature(SST) biases over the Northwest Pacific are investigated based on a mixed-layer heat budget analysis in 21 coupled general circulation models(CGCMs) from phase 5 of the Coupled Model Inter-comparison Project(CMIP5). Most CMIP5 models show cold SST biases throughout the year over the Northwest Pacific. The largest biases appear during summer, and the smallest biases occur during winter. These cold SST biases are seen at the basin scale and are mainly located in the inner region of the low and mid-latitudes. According to the mixed-layer heat budget analysis, overestimation of upward net sea surface heat fluxes associated with atmospheric processes are primarily responsible for the cold SST biases. Among the different components of surface heat fluxes, overestimated upward latent heat fluxes induced by the excessively strong surface winds contribute the most to the cold SST biases during the spring, autumn, and winter seasons. Conversely, during the summer, overestimated upward latent heat fluxes and underestimated downward solar radiations at the sea surface are equally important. Further analysis suggests that the overly strong surface winds over the Northwest Pacific during winter and spring are associated with excessive precipitation over the Maritime Continent region,whereas those occurring during summer and autumn are associated with the excessive northward extension of the intertropical convergence zone(ITCZ). The excessive precipitation over the Maritime Continent region and the biases in the simulated ITCZ induce anomalous northeasterlies, which are in favor of enhancing low-level winds over the North Pacific. The enhanced surface wind increases the sea surface evaporation, which contributes to the excessive upward latent heat fluxes. Thus, the SST over the Northwest Pacific cools.

关键词： CMIP5 multi-model ensemble SST bias Mixed-layer heat budget analysis Atmospheric processes

Structural understanding of T cell receptor triggering

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Cellular & Molecular Immunology 2020年第3期17卷 193-202页

作者： Xinyi Xu Hua Li chenqi Xu State Key Laboratory of Molecular Biology Shanghai Science Research CenterCAS Center for Excellence in Molecular Cell ScienceShanghai Institute of Biochemistry and Cell BiologyChinese Academy of SciencesUniversity of Chinese Academy of Sciences320 Yueyang Road200031 ShanghaiChina School of Life Science and Technology ShanghaiTech University100 Haike Road201210 ShanghaiChina

The T cell receptor(TCR)is one of the most complicated receptors in mammalian cells,and its triggering mechanism remains *** an octamer complex,TCR comprises an antigen-binding subunit(TCRαβ)and three CD3 signaling subunits(CD3ζζ,CD3δε,and CD3γε).Engagement of TCRαβwith an antigen peptide presented on the MHC leads to tyrosine phosphorylation of the immunoreceptor tyrosine-based activation motif(ITAM)in CD3 cytoplasmic domains(CDs),thus translating extracellular binding kinetics to intracellular signaling *** conformational change plays an important role in the transmembrane signal transduction of TCR is under *** by the complexity and functional importance of TCR,many groups have been studying TCR structure and triggering for decades using diverse biochemical and biophysical ***,we synthesize these structural studies and discuss the relevance of the conformational change model in TCR triggering.

关键词： T Cell Receptor Structure Conformational change Triggering

Oxidant-free dehydrogenative coupling via electrooxidation:a mild,green,and sustainable route to synthesize aryl amines integrated with hydrogen evolution

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Science Bulletin 2018年第11期63卷 666-668页

作者： chenqi Huang Yi Huang Bin Zhang Department of Chemistry School of ScienceTianjin Key Laboratory of Molecular Optoelectronic ScienceTianjin UniversityCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin 300072China

Transition-metal(TM)-catalyzed coupling reactions play a fundamental and powerful role in synthetic chemistry,which have been widely applied in both academia and industry[1].However,the classic coupling reactions usually using organic halides as partners,suffering from the pre-functionalization of the substrates and dealing with stoichiometric amounts of salts byproducts,which add the complexity of operation and reduce the overall efficiency of the transformation[2,3].Therefore,developing efficient,highly atom-economical,and environmentally benign

关键词：氧化剂芳基胺逃跑进化线路合成化学经典著作氢

Behavioral and Physiological Responses of Sea Slug (Onchidium reevesii) to Low-Frequency Noise

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Journal of Ocean University of China 2022年第6期21卷 1607-1614页

作者： TU Zhihan LI chenqi JIA Jingjing SHEN Heding National Demonstration Center for Experimental Fisheries Science Education Shanghai Ocean UniversityShanghai 201306China International Research Center for Marine Biosciences Ministry of Science and TechnologyShanghai Ocean UniversityShanghai 201306China Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-Culture of Aquaculture Animals Shanghai 201306China

A large amount of marine noise pollution from coastal industrial construction and the water transportation industry affects the growth and development of marine life,which is a big issue threatening marine ***,most studies have focused on vertebrates,such as marine mammals and fishes,and little is known about the effects of noise on ***,the impacts of low-frequency noise(100,300,and 500 Hz)on behavioral and physiological responsesof the sea slug(Onchidium reevesii)were *** laboratory conditions,sea slugs were stimulated with low-frequency noise at 100,300,and 500 Hz for 1 ***,hemolymph enzyme activities(glucose,albumin,triglycerides,superoxide dismutase,catalase,and malondialdehyde)were measured,and mRNA expression of the hsp70 gene was detected in hemolymph and the nervous system by quantitative realtime polymerase chain reaction(qRT-PCR)analysis,while expression of the hsp70 protein was analyzed by *** results demonstrated that sea slugs were away from the stimulus source under the influence of low-frequency noise compared to the control *** activities,as well as hsp70 gene mRNA and protein expression levels,were significantly higher in the noiseexposed groups than those in the control ***,these changes indicate that low-frequency noise caused oxidative stress in sea slugs in vivo,and the oxidative damage gradually increased when the noise frequency was increased from 100 to 500 Hz.

关键词： ocean noise Onchidium reevesii low-frequency noise biochemical stress mollusks

Characteristics of low- frequency components of the near-bottom current in the Chinese Pioneer Area

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Chinese Science Bulletin 2004年第11期49卷 1184-1189页

作者： LIANGChujin HOUYijun chenqi DONGRuzhou DONGLixian InstituteofOceanologyChineseAcademyofSciences Qingdao266071China TheSecondInstituteofOceanography StateofOceanAdministrationHangzhou310012China

Two deep-sea moorings were deployed respectively in the east area and the west area of Chinese Pioneer Area (CPA) in the tropic east Pacific to monitor the regional deep-sea dynamics below 600 meters above bottom (mab) from July 1997 to Oct. 1999. Results of statistics, spectral estimate and correlation analysis of the low-passed velocity data show that time scales of low-frequency components of the near-bottom currents are 25~120 days, in which 51-day period dominates the lower band of the frequency domain. Topographic features have obvious effect on low-frequency currents below 50 mab; modulations of the bot-tom-intensified sheared mean flow to the low-frequency currents are the dynamic mechanism of the frequency shift that occurs in both the east-area and the west-area.

关键词：低频组分 CPA 中国先进地区频率转移低频流深海动力学

Upper ocean response to typhoon Kujira(2015) in the South China Sea by multiple means of observation

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Journal of Oceanology and Limnology 2020年第2期38卷 314-333页

作者： GUO Jie ZHANG Tianlong XU chenqi XIE Qiang Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone Research(YIC)Chinese Academy of Sciences(CAS)Yantai 264003China Shandong Key Laboratory of Coastal Environmental Processes YICCASYantai 264003China Center for Ocean Mega-Science CASQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Institute of Deep-sea Science and Engineering CASSanya 572000China

The impact of typhoon Kujira(2015)on the ocean environment around Yongxing Island in the South China Sea was observed using multiple-satellite sensors and on-site data.A subsurface buoy and Agro float were located to the left and lower right of the track of the *** observations revealed sea surface cooling of up to 2.5℃,a maximum decrease in sea surface salinity of 2 in the main study area because of heavy rain,and increases in the chlorophyll concentration induced by the slow-moving typhoon with a maximum observed instantaneous wind speed of 35.1 m/*** sea surface temperature to the right of the typhoon track changed more than that on the left owing to a right bias of the typhoon associated with coupling of the typhoon with wind stress on the sea *** the ocean interior,there was obvious downwelling at 24.7 m and upwelling at a depth of 35.7 m with the vertical entrainment and agitation of the typhoon,and the ef fects extended to different depths of up to more than 1000 *** the typhoon passed through the main study area,the maximum flow velocity change at depths of 51 and 660 m was about 0.44 and 0.04 m/s,*** typhoon af fected the flow field to a depth of 660 m as it formed and decayed in 11 h,moved at an average speed of 60 m/h,and af fected the sea surface over a range exceeding 700 km as it moved slowly and stayed at sea for 2 *** entrainment and agitation generated by the typhoon,as well as rainfall,cooled the sea *** inhibited the strengthening of the typhoon,but the energy transmitted to the ocean led to divergence-convergence flow from a shallow to deep layer.

关键词： typhoon Kujira(2015) downwelling upwelling flow field wind field salinity temperature

Phase and structure modulating of bimetallic Cu/In nanoparticles realizes efficient electrosynthesis of syngas with wide CO/H_(2) ratios

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Nano Research 2022年第1期15卷 528-534页

作者： chenqi Shen Pengtang Wang Leigang Li Xiaoqing Huang Qi Shao College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Syngas(CO+H_(2))is the incredibly important feedstock for producing synthetic fuels and various value-added ***_(2) electrochemical reduction to syngas is an environmental-friendly and sustainable approach,but still challenging to produce tunable syngas with a wide ratio of CO+H_(2).Herein,by modulating the structure and phase,we have successfully obtained a series of copper-indium(Cu-ln)catalysts,which are efficient for producing syngas with tunable CO+H_(2) ratios.A series of Culn bimetallic catalysts with different structures from hollow sphere to two-layer hollow sphere and different phases from CuO to CU_(2)O are *** find that the CO and H2 are the only gaseous products,in which the CCD/H_(2) ratios can be readily tuned from 1.2±0.1 to 9.0±1.5 by simply controlling the thermal annealing *** also exhibits high durability during a 10-h *** unique performance is attributed to the modulated In enrichment on the Cu surfaces during the CO_(2) reduction reaction,which causes the differences in binding energies for key reaction intermediates,thus resulting in the tunable composition of *** present work emphasizes a simple yet efficient phase and structure modulating strategy for designing potential electrocatalysts for producing syngas with widely tunable CO+H_(2) ratios.

关键词： copper indium phase-engineering CO_(2)reduction syngas

Thied—Order Approximation of 0^＋＋ Glueball Mass and Wavefunction of （2＋1）—Dimensional SU（3） Lattice Gauge Theory

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Communications in Theoretical Physics 2001年第1期35卷 28-31页

作者： LIJie－Ming chenqi－Zhou 等 DepartmentofPhysics ZhoungshanUniversityGuangzhou510275China

The random phase approximation is applied to the coupled-cluster expansions of lattice gauge theory (LGT). Using this method, wavefunctions are approximated by linear combination of graphs consisting of only one connected Wilson loop. We study the excited state energy and wavefunction in (2+1)-D SU(3) LGT up to the third order. The glueball mass shows a good scaling behavior.

关键词： random phase approximation coupled-cluster expansion Wilson loop glueball mass