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Biocalcification crisis in the continental shelf under ocean acidification

Geoscience Frontiers 2023年第6期14卷 1-7页

作者： Shuaishuai dong Yanli Lei Tiegang Li Yifei Cao Kuidong Xu Laboratory of Marine Organism Taxonomy and Phylogeny Qingdao Key Laboratory of Marine Biodiversity and ConservationInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyMNRQingdao 266061China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China University of Chinese Academy of Sciences Beijing 100049China

Ocean acidification(OA)is a persistent challenge for humans and is predicted to have deleterious effects on marine organisms,especially marine calcifiers such as coral and *** foraminifera is an important component of sediment in the continental shelf,while little is known about the impact of ocean acidification on benthic foraminifera both at the community and individual level and associated calcium carbonate *** conducted eight months continued culture experiment under the scenario of 400,800,1200 and 1600 ppm pCO_(2)gradients on living benthic foraminifera from four stations in the continental shelf of the West Pacific *** results showed OA had a negative effect on the abundance of benthic *** contrast,the diversity increased roughly under OA conditions implying OA might stimulate the emergence of rare species and promote community diversity to some *** addition,we confirmed that the offshore area wasn’t the refuge for benthic foraminifera while the nearshore one had more resistance to moderate *** species Protelphidium tuberculatum was the dominant species occupying on average 75%in all treatments and its shell diameter,weight and thickness showed a decrease,indicating the decrease of calcification of benthic foraminifera.A relationship between the weight of *** and pCO_(2)(R^(2)=0.96)was *** on the present work,calcareous benthic foraminifera deposited 8.57104 t calcium carbonate per year and this might reduce by nearly half and 90%under 800 and 1200 ppm scenarios,which indicates a biocalcification crisis under ongoing *** work shows an analogy for palaeoceanic OA and also provides new insights into the sediment of calcium carbonate in the future.

关键词： Benthic foraminifera pCO_(2) Ocean acidification Continental shelf Calcium carbonate deposit Yellow Sea

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Time-varying gravity field model of Sichuan-Yunnan region based on the equivalent mass source model

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Geodesy and Geodynamics 2023年第6期14卷 566-572页

作者： Xiaozhen Hou Shi Chen Linhai Wang Jiancheng Han dong Ma Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards Xingtai 054000China Hebei Earthquake Agency Shijiazhuang 050021China Innovative Research Team of Hebei Earthquake Agency for Seismographs Calibration Valuation and Selection of Observation SitesShijiazhuang 050021China Institute of Geophysics China Earthquake AdministrationBeijing 100081China Beijing Baijiatuan Earth Sciences National Observation and Research Station Beijing 100095China

High-precision time-varying gravity field is an effective way to study the internal mass movement and understanding the spatio-temporal evolution process of the geodynamic *** to the satellite gravity measurement,the repeated terrestrial gravity observation can provide a more high-order signal related to the shallow crust and ***,the suitable and unified method for gravity model estimation is a key problem for further *** this study,we introduce the spherical hexahedron element to simulate the field source mass and forward model the change of gravity field located at the Sichuan-Yunnan region(99—104°E,23—29°N)in the four epochs from 2015 to *** to the experimental results based on Slepian or spherical harmonics frequency domain method,this alternative approach is suitable for constructing the equivalent mass source model of regional-scale gravity data,by introducing the first-order smooth prior condition of gravity time-varying signal to suppress the high-frequency component of the *** results can provide a higher spatial resolution reference for regional gravity field modeling in the Sichuan-Yunnan region.

关键词： Gravity change Equivalent source model Time-varying gravity model Gravity field Inversion

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Joint Probability Analysis and Prediction of Sea Ice Conditions in Liaodong Bay

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Journal of Ocean University of China 2024年第1期23卷 57-68页

作者： LIAO Zhenkun dong Sheng TAO Shanshan HUA Yunfei JIA Ning College of Engineering Ocean University of ChinaQingdao 266100China Shuifa Planning and Design Co. Ltd.Jinan 250100China National Hazards Mitigation Service Beijing 100194China

Sea ice conditions in Liaodong Bay of China are often described by sea ice grades,which classify annual sea ice conditions based on the annual maximum sea ice thickness(AM-SIT)and annual maximum floating ice extent(AM-FIE).The joint probability distribution of AM-SIT and AM-FIE was established on the basis of their data pairs from 1949/1950 to 2019/2020 in Liaodong *** joint intensity index of the sea ice condition in the current year is calculated,and the joint classification criteria of the sea ice grades in past years are established on the basis of the joint intensity index series.A comparison of the joint criteria with the 1973 and 2022 criteria revealed that the joint criteria of the sea ice grade match well,and the joint intensity index can be used to quantify the sea ice condition over the years.A time series analysis of the sea ice grades and the joint intensity index sequences based on the joint criteria are then *** show a decreasing trend of the sea ice condition from 1949/1950 to 2019/2020,a mutation in 1990/1991,and a period of approximately 91 years of the sea ice *** addition,the Gray-Markov model(GMM)is applied to predict the joint sea ice grade and the joint intensity index of the sea ice condition series in future years,and the error between the results and the actual sea ice condition in 2020/2021 is small.

关键词： sea ice grade ice thickness floating ice extent Liaodong Bay copula

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Parapatric speciation with recurrent gene flow of two sexual dichromatic pheasants

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Avian Research 2022年第2期13卷 137-144页

作者： Zheng Li Jie Zhou Minzhi Gao Wei Liang Lu dong Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijing100875China Ministry of Education Key Laboratory for Ecology of Tropical Islands College of Life SciencesHainan Normal UniversityHaikou571158China

Understanding speciation has long been a fundamental goal of evolutionary *** is widely accepted that speciation requires an interruption of gene flow to generate strong reproductive isolation between *** mechanism of how speciation in sexually dichromatic species operates in the face of gene flow remains an open *** species in the genus Chrysolophus,the Golden Pheasant(***)and Lady Amherst’s Pheasant(***),both of which exhibit significant plumage dichromatism,are currently parapatric in southwestern China with several hybrid recordings in *** this study,we estimated the pattern of gene flow during the speciation of the two pheasants using the Approximate Bayesian Computation(ABC)method based on data from multiple *** a newly assembled de novo genome of Lady Amherst’s Pheasant and resequencing of widely distributed individuals,we reconstructed the demographic history of the two pheasants by the PSMC(pairwise sequentially Markovian coalescent)*** results provide clear evidence that the gene flow between the two pheasants was consistent with the predictions of the isolation with migration model during divergence,indicating that there was long-term gene flow after the initial divergence(ca.2.2 million years ago).The data further support the occurrence of secondary contact between the parapatric populations since around 30 kya with recurrent gene flow to the present,a pattern that may have been induced by the population expansion of the Golden Pheasant in the late *** results of the study support the scenario of speciation between the Golden Pheasant and Lady Amherst’s Pheasant with cycles of mixing-isolation-mixing,possibly due to the dynamics of geographical context in the late *** two species provide a good research system as an evolutionary model for testing reinforcement selection in speciation.

关键词： Approximate Bayesian Computation Gene flow Golden Pheasant(Chrysolophus pictus) Lady Amherst’s Pheasant(Chrysolophus amherstiae) Pairwise Sequentially Markovian Coalescent Speciation

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Strain of 2D materials via substrate engineering

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Chinese Chemical Letters 2022年第1期33卷 153-162页

作者： Yangwu Wu Lu Wang Huimin Li Qizhi dong Song Liu Institute of Chemical Biology and Nanomedicine(ICBN) State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Two-dimensional(2D)materials have received extensive attention in the fields of electronics,optoelectronics,and magnetic devices attributed to their unique electronic structures and physical *** application of strain is a simple and effective strategy to change the lattice structure of 2D materials thus modulating their physical properties,which further facilitate their applications in carrier mobility transistor,magnetic sensor,single-photon emitter *** this short review,we focus on the strain applied via substrate ***,the relationship between the strain and physical properties has been ***,the methods for achieving substrate engineering-induced strain have been ***,the latest applications of strained 2D materials have been *** addition,the future challenges and development prospects of strain-modulated 2D materials have also been proposed.

关键词： 2D materials Strain engineering Substrate engineering Substrate structures Substrate functions

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Vitamin A regulates intramuscular adipose tissue and muscle development:promoting high-quality beef production

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Journal of Animal Science and Biotechnology 2021年第3期12卷 1138-1147页

作者： dong Qiao Peng Stephen B.Smith Hong Gu Lee Department of Animal Science and Technology Sanghuh College of Life SciencesKonkuk UniversitySeoul 05029South Korea Department of Animal Science Texas A&M UniversityCollege StationTX 77843USA

During growth in cattle,the development of intramuscular adipose tissue and muscle is dependent upon cell hyperplasia(increased number of adipocytes)and hypertrophy(increased size of adipocytes).Based on the results of previous studies,other adipose tissue depots(e.g.,perirenal and subcutaneous)develop from the fetal stage primarily as brown adipose *** hyperplastic stage of intramuscular adipose is considered to develop from late pregnancy,but there is no evidence indicating that intramuscular adipose tissue develops initially as brown adipose *** growth of intramuscular adipose continues well into postweaning and is dependent on the timing of the transition to grain-based diets;thereafter,the late-stage development of intramuscular adipose tissue is dominated by *** muscle development,hyperplasia of myoblasts lasts from early(following development of somites in the embryo)to middle pregnancy,after which growth of muscle is the result of hypertrophy of *** A is a fat-soluble compound that is required for the normal immunologic function,vision,cellular proliferation,and *** we review the roles of vitamin A in intramuscular adipose tissue and muscle development in *** A regulates both hyperplasia and hypertrophy in in vitro *** A supplementation at the early stage and restriction at fattening stage generate opposite effects in the beef *** vitamin A supplementation and restriction strategy increase intramuscular adipose tissue development(i.e.,marbling or intramuscular fat)in some in vivo ***,hyperplasia and hypertrophy of myoblasts/myotubes were affected by vitamin A treatment in in vitro ***,some studies reported an interaction between the alcohol dehydrogenase-1C(ADH1C)genotype and vitamin A feed restriction for the development of marbling and/or intramuscular adipose tissue,which was dependent on the timing and level of vitamin A

关键词： Adipose tissue Cattle Intramuscular adipose tissue Muscle development Vitamin A

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Prediction-Based State Estimation and Compensation Control for Networked Systems With Communication Constraints and DoS Attacks

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IEEE/CAA Journal of Automatica Sinica 2024年第11期11卷 2352-2354页

作者： Zhong-Hua Pang Qian Cao Haibin Guo Zhe dong IEEE the Key Laboratory of Fieldbus Technology and Automation of Beijing North China University of Technology

Dear Editor,This letter investigates the output tracking control issue of networked control systems(NCSs)with communication constraints and denial-of-service(DoS)attacks in the sensor-to-controller channel,both of whi... 详细信息

关键词： DoS service network

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Local variations of charge radii for nuclei with even Z from 84 to 120

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Communications in Theoretical Physics 2023年第3期75卷 75-83页

作者： Rong An Xiao-Xu dong Li-Gang Cao Feng-Shou Zhang Key Laboratory of Beam Technology of Ministry of Education Institute of Radiation TechnologyBeijing Academy of Science and TechnologyBeijing 100875China Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China CAS Key Laboratory of High Precision Nuclear Spectroscopy Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China School of Physics Beihang UniversityBeijing 102206China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of LanzhouLanzhou 730000China

Pronounced changes of nuclear charge radii provide a stringent benchmark on the theoretical models and play a vital role in recognizing various nuclear *** this work,the systematic evolutions of nuclear charge radii along even Z=84-120 isotopic chains are first investigated by the recently developed new ansatz under the covariant density *** calculated results show that the shell closure effects of nuclear charge radii appear remarkably at the neutron numbers N=126 and ***,the arch-like shapes of charge radii between these two strong neutron-closed shells are naturally *** the N=184 shell closure,the abrupt increase in charge radii is still evidently *** addition,the rapid raise of nuclear charge radii from the neutron numbers N=138 to N=144 is disclosed clearly in superheavy regions due to the enhanced shape deformation.

关键词： covariant density functional shell closure effect shape phase transition

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Recent Advances in Atomic-scale Storage Mechanism Studies of Two-dimensional Nanomaterials for Rechargeable Batteries Beyond Li-ion

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Chemical Research in Chinese Universities 2020年第4期36卷 560-583页

作者： PAN Lu dong Jinyang YI Ding YANG Yijun WANG Xi Department of Physics School of ScienceBeijing Jiaotong UniversityBeijing 100044P.R.China Chemistry ami Chemical Engineering Guangdong Laboratory Shantou 515031P.R.China Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081P.R.China

Developing new types of rechargeable batteries with high energy densities and low cost have received in creasing attentions,aiming to reduce the dependence on high-priced *** Li-ion batteries,the potential alternatives including Na-ion batteries,Li-S batteries and Li-air batteries have been investigated recently,which are required to be viable for commercial *** this point of view,to understand the electrochemical reaction mechanisms and kinetics of these batteries has become the key challenge to make breakthroughs in the field of new energy *** this review,we present a critical overview of the two dimensional nanomaterials-based batteries(except Li-ion-based batteries)that could meet such *** develop new energy storage devices with more promising performances,the microstructure evolution and atomic scale storage mechanism of these batteries are comprehensively *** addition,the major challenges and opportunities of advanced characterization techniques are finally *** do hope that this review will give the readers a clear and profound understanding of the electrochemical reaction mechanisms and kinetics of the as-discussed *** effectively contributing to the smart design of future-generation energy storage devices.

关键词： Two dimensional(2D)nanomaterial Batteries beyond Li ion In sinu technique Atomic-level Storage mechanism and kinetics

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Effective Jump Length of Coupled Continuous Time Random Walk

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Chinese Physics Letters 2013年第2期30卷 5-7页

作者： LIU Jian BAO Jing-dong Department of Physics Beijing Normal UniversityBeijing 100875

The concept effective jump length is *** to the joint probability density function of jump length and waiting time,it is complicated to distinguish the diffusion ***,we calculate the probability density function of effective jump length for the coupled continuous time random walk model we proposed *** mean square displacements deduced are coincident with the known *** importantly,we find that the anomalous diffusion induced by the coupled model is equivalent to the competition between long jump length and long waiting time.

关键词： diffusion coincide deduced

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