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Light(Science & Applications) 2020年第1期9卷 1799-1808页

作者： Shisheng Lin Hang Lin Chonggeng ma Yao Cheng Sizhe Ye Fulin Lin Renfu Li ju.Xu Yuansheng Wang Key Laboratory of Optoelectronic materials Chemistry and Physics Key Laboratory of Design and Assembly of Functional NanostructuresFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002China University of Chinese Academy of Sciences Beijing 100049China CQUPT-BRU Innovation Institute Chongqing University of Posts and TelecommunicationsChongqing 400065China Xiamen Institute of Rare-earth materials Haixi InstitutesChinese Academy of SciencesXiamenFujian 361000China

The launch of the big data era puts forward challenges for information preservation technology,both in storage capacity and ***,a brand new optical storage medium,transparent glass ceramic(TGC)embedded with photostimulated LiGa5O8:Mn2+nanocrystals,capable of achieving bit-by-bit optical data write-in and read-out in a photon trapping/detrapping mode,is *** highly ordered nanostructure enables light–matter interaction with high encoding/decoding resolution and low bit error ***,going beyond traditional 2D optical storage,the high transparency of the studied bulk medium makes 3D volumetric optical data storage(ODS)possible,which brings about the merits of expanded storage capacity and improved information *** application confirmed the erasable-rewritable 3D storage of binary data and display items in TGC with intensity/wavelength *** present work highlights a great leap in photostimulated material for ODS application and hopefully stimulates the development of new multi-dimensional ODS media.

关键词： optical glass trapping

Tensor Susceptibilities of QCD Vacuum and Parameterized Quark Propagator

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Communications in Theoretical Physics 2008年第3期49卷 717-722页

作者： ZHOU Li-ju.n MENG Cheng-ju.PAN Ji-Huan LIU Bao-Rong ma Wei-Xing Collaboration Group of Hadron Physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou 545006 China Department of Physics Hechi College Yizhou 546300 China Department of Physics Guangxi University Nanning 530004 China Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100049 China

Based on the parameterized fully dressed quark propagator proposed by us, the tensor susceptibilities of QCD vacuum and quark vacuum condensates are investigated. Our predicted values of the tensor susceptibilities are in agreement with those predicted by many other theoretical models with QCD feature. The results also show that the tensor susceptibility of QCD vacuum strongly depends on flavor of quark but not sensitive to variation of quark vacuum condensates. However, the quark vacuum condensate is very sensitive to the change of cut-off-parameter μ^2 of the integration, that is, it depends on the separation point of perturbative and non-perturbative QCD region. The successful predictions clearly indicate the extensive validity of our parameterized fully dressed quark propagator used here.

关键词： QCD vacuum tensor susceptibilities quark propagator

Photoproduction of Vector Meson φ off Deuteron in QCD Inspired Model

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Communications in Theoretical Physics 2009年第8期52卷 295-301页

作者： MENG Cheng-ju.PAN Ji-Huan PENG Jin-Song ma Wei-Xing YUAN Tong-Quan Department of Physics and Electronic Engineering Hechi College Yizhou 546300 China Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100049 China

Based on the quark-gluon contents of nucleon and strongly believing that the force mediators,Pomeronand its counterpart in the conventional approach of Regge theory,for high energy diffractive process would be the tensorglueball and Odderon respectively,we discuss photo-production of vector meson φ off the deuteron at energy less than 3GeV in the QCD inspired model in which the quark gluon degrees of freedom and glueball,Odderon exchange are takeninto account.A calculation is performed for γ + D →φ + D,and the theoretical predictions of the differential crosssection dσ^(γD)) /dt,are presented and compared with available experimental *** QCD inspired model reproducesdata quite well in the whole range of the experimental measurements up to |t| ■0.4 *** results can be used toextract γn→φn data,which cannot be measured in experiment.

关键词： photoproduction of vector meson QCD generalized vector meson dominance model QCD

A New Route for Identification of Precipitates on Austenite Grain Boundary in an Nb-V-Ti Microalloyed Steel

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Journal of Iron and Steel Research International 2011年第8期18卷 53-57页

作者： SHA Qing-yun HUANG Guo-jian GUAN ju.ma Xiao-ju. LI Da-hang Technology Center Angang Steel Company Limited Anshan 114009 Liaoning China

The precipitates on austenite grain boundaries in an Nb-V-Ti microalloyed steel have been investigated by transmission electron microscope （TEM） examination of carbon extraction replica. The replica was prepared from specimen etched with saturated picric solution rather than Nital which is conventionally used. Then particles on both grain boundaries and triple point of grain [aoundaries were clearly observed and identified as （Nb,Ti）（C, N） parti- cles. In case of conventional way, it is difficult to determine the location of particles with respect to austenite grain boundaries. The number of particles observed in new way developed was greatly reduced compared with that found in replica prepared by the conventional way, which may be caused by the dissolution of partial precipitates during the etching with longer time and at higher temperature involved in new way. Despite this, the new way developed pro- vides an effective way to determine the precipitate particles on austenite urain boundaries_

关键词： precipitate austenite grain boundary replica etch

Climatic and lake environmental changes in the Serling Co region of Tibet over a variety of timescales

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Science Bulletin 2019年第7期64卷 422-424页

作者： Liping Zhu ju.bo Wang Jianting ju.Ning ma Yinsheng Zhang Chong Liu Boping Han Linshan Liu Mingda Wang Qingfeng ma Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau Research Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Ecology Jinan University Institute of Geographic Sciences and Natural Resource Research Chinese Academy of Sciences

The Serling Co region is located at the transitional zone of the interaction between the Indian monsoon and the westerlies over the Tibetan Plateau. The Serling Co lake covers a water area of2,389 km2(ju.e 2017) in a 45,530 km2drainage basin. Under the dramatic hydro-meteorological changes on the Tibetan Plateau in recent decades, and complex hydrological compositions of rivers and lakes in the basin, the lake area expanded by 43%, from1,667 km2in 1976, to 2,389 km2in 2017 (1)In 2014 it surpassed Nam Co as the largest lake on the Tibetan Plateau [2], and exerts significant effect on regional environmental conditions.

关键词： Co Ti Climatic and lake environmental changes in the Serling Co region of Tibet over a variety of timescales

Enzymatic Synthesis of a Diastereomer of Neoabyssomicin Derivative Using the Diels-Alderase AbyU

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Chinese Journal of Chemistry 2021年第7期39卷 1871-1877页

作者： Wenju.n Ding Changbiao Chi Xiaoyi Wei Changli Sun Jiajia Tu Ming ma Qinglian Li Jianhua ju CAS Key Laboratory of Tropical marine Bio-Resources and Ecology Guangdong Key Laboratory of Marine Materia MedicaRNAM Center for Marine MicrobiologySouth China Sea Institute of OceanologyChinese Academy of Sciences164 West Xingang RoadGuangzhouGuangdong510301 China College of Oceanology University of Chinese Academy of Sciences19 Yuquan RoadBeijing100049 China Southern marine Science and Engineering Guangdong Laboratory(Guangzhou) No.1119Haibin Rd.Nansha DistrictGuangzhouGuangdong510301 China State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical SciencesPeking UniversityBeijing100191 China Key Laboratory of Plant Resources Conservation and Sustainable Utilization South China Botanical GardenChinese Academy of SciencesGuangzhouGuangdong510650 China

main observation and conclusion The enzyme AbyU catalyses a Diels-Alder(DA)reaction during abyssomicin C *** this study,AbyU is shown to convert the native substrate of another Diels-Alderase(DAase),AbmU,to a new abys... 详细信息

关键词： Biosynthesis Bioorganic chemistry Enzyme catalysis Neoabyssomicin Diels-Alderase

Dynamic evolution characteristics of the “source-reservoir” integration of gray marl and its geological significance to unconventional gas: Insights from pyrolysis experiments

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Petroleum Science 2023年第2期20卷 705-720页

作者： Zhang-Hu Wang Zhong-Liang ma Lun-ju.Zheng ju.-Yu Wang Zhi-Gang Wen Chen-Yang Si Cooperative Innovation Center of Unconventional Oil and Gas Yangtze UniversityWuhanHubei430100China Key Laboratory of Oil and Gas Resources and Exploration Technology Ministry of EducationCollege of Resources and EnvironmentYangtze UniversityWuhanHubei430100China Wuxi Research Institute of Petroleum Geology Sinopec Exploration and Production Research InstituteWuxiJiangsu214126China State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development WuxiJiangsu214126China School of Metallurgy and Environment Central South UniversityChangshaHunan410083China

The marl–limestone rhythmic strata of the Permian maokou Formation have been identified as hosts of unconventional gas reservoirs with “source–reservoir” integration. The lack of research on the pore structure evolution of organic-rich carbonate rock restricts gas exploration of these strata. Here, pyrolysis experiments were performed on the mao-1 carbonate to simulate hydrocarbon generation, expulsion and diagenesis in gray marl from low maturity to overmaturity. The pore structure of this marl is dominated by mesopores and macropores, and the proportion of macropores increases gradually with temperature. The macropores are mainly pores in the organic matter and shrinkage microcracks. Additionally, micropores and mesopores, dominated by clay mineral interlayer pores and pyrite intergranular pores, are developed in the high mature stage and subsequently compressed in the overmature stage. The main contributors to the specific surface area are micropores and mesopores, which are conducive to natural gas adsorption. After the same pyrolysis treatment, the available porosity of grey marl is higher than that of marine/lacustrine shales, and exhibits an obvious decrease in the low mature–mature stage. These suggest that the abundant residual oil generated blocked the organic and inorganic pores in the gray marl, providing a pivotal material foundation for the gas generation. Micropores and mesopores developed during the high mature stage ensure the gas accumulation and preservation. The above indicate the organic-rich carbonate at the high mature–overmature stage (Ro = 1.7%–2.5%) in the Sichuan Basin may be a favorable exploration horizon for unconventional oil and gas.

关键词： Residual oil Organic pores Porosity Sepiolite Hydrocarbon generation

A novel spiking neural network of receptive field encoding with groups of neurons decision

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Frontiers of Information Technology & Electronic Engineering 2018年第1期19卷 139-150页

作者： Yong-qiang ma Zi-ru WANG Si-yu YU Ba-dong CHEN Nan-ning ZHENG Peng-ju.REN Institute of Artificial Intelligence and Robotics Xi'an Jiaotong University

Human information processing depends mainly on billions of neurons which constitute a complex neural network,and the information is transmitted in the form of neural *** this paper,we propose a spiking neural network(SNN),named MD-SNN,with three key features:(1) using receptive field to encode spike trains from images;(2) randomly selecting partial spikes as inputs for each neuron to approach the absolute refractory period of the neuron;(3) using groups of neurons to make *** test MD-SNN on the MNIST data set of handwritten digits,and results demonstrate that:(1) Different sizes of receptive fields influence classification results significantly.(2) Considering the neuronal refractory period in the SNN model,increasing the number of neurons in the learning layer could greatly reduce the training time,effectively reduce the probability of over-fitting,and improve the accuracy by 8.77%.(3) Compared with other SNN methods,MD-SNN achieves a better classification;compared with the convolution neural network,MD-SNN maintains flip and rotation invariance(the accuracy can remain at 90.44% on the test set),and it is more suitable for small sample learning(the accuracy can reach 80.15%for 1000 training samples,which is 7.8 times that of CNN).

关键词： Tempotron Receptive field Difference of Gaussian(DoG) Flip invariance Rotation invariance

Albumosomes formed by cytoplasmic pre-folding albumin maintain mitochondrial homeostasis and inhibit nonalcoholic fatty liver disease

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Signal Transduction and Targeted Therapy 2023年第7期8卷 3466-3485页

作者： Boyuan ma Anji ju.Shaosen Zhang Qi An Siran Xu Jie Liu Li Yu Yan Fu Yongzhang Luo School of Life Sciences Tsinghua University100084 BeijingChina The National Engineering Research Center for Protein Technology Tsinghua University100084 BeijingChina Beijing Key Laboratory for Protein Therapeutics Tsinghua University100084 BeijingChina State Key Laboratory of Membrane Biology Tsinghua University-Peking University Joint Centre for Life SciencesBeijing Frontier Research Center for Biological StructureSchool of Life SciencesTsinghua University100084 BeijingChina Present address:Department of Etiology and Carcinogenesis National Cancer Center/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical College100021 BeijingChina Present address:Immunogenetics Laboratory Shenzhen Blood Center518025 ShenzhenGuangdongChina

Hepatic mitochondrial dysfunction contributes to the progression of nonalcoholic fatty liver disease(NAFLD).However,the factors that maintain mitochondrial homeostasis,especially in hepatocytes,are largely *** synthesize various high-level plasma proteins,among which albumin is most *** this study,we found that pre-folding albumin in the cytoplasm is completely different from folded albumin in the serum.

关键词： homeostasis maintain folding

The influence of adding niobium and vanadium on hydrogen diffusion in 22MnB5 hot stamping steel

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Journal of Iron and Steel Research International 2023年第10期30卷 2031-2042页

作者： Peng-wei Zhou Zhi-yi Yan Ke Wang Tao Liu Si-jia Chen Zhen ma ju.sha ma Wei Ding Yi Luo Bing-gang Liu Wei Li Shanghai Institute of Space Power-Sources Shanghai 200245China State Key Lab of Metal matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200245China

Adding alloying elements is always considered as an effective method to enhance the resistance against hydrogen embrittlement in *** and V were added into 22MnB5 hot stamping steel,and then their influences on hydrogen permeation of 22MnB5 steel suffering from corrosion in 3.5%NaCl aqueous solution were *** results showed that the addition of Nb/V could reduce the hydrogen permeation content due to solution *** techniques including electrochemical impedance spectroscopy and overpotential stepping hydrogen permeation test con-firmed that compared to the original 22MnB5 steel,22MnB5-NbN steel owned a higher corrosion resistance and a higher hydrogen diffusion ***,it was confirmed that Nb-V-alloyed 22MnB5 steel showed higher resistance against hydrogen embrittlement than the Nb-V-free counterpart,which should be related to the presentence of nanoscaled Nb/V-containing precipitates as the irreversible trapping sites for hydrogen detected by thermal desorption ***,the lattice diffusion coefficient of hydrogen DL was determined in steels with and without Nb and V.

关键词： Hydrogen permeation Corrosion Hot stamping steel Niobium Vanadium Thermal desorption spectroscopy