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Journal of Systems Science and Information 2022年第5期10卷 445-465页

作者： Shengguo LI Xiaodong ding Shijie XU Jichang DONG Zhi DONG School of Economics and Management University of Chinese Academy of SciencesBeijing 100190China Weiqiao Guoke Joint Laboratory University of Chinese Academy of SciencesBeijing 100190China

Under the background of population aggregation in megacities,some adjustments are made to the urbanization strategy,whose focus is shifted to the development of megacities and megacity ***,the housing price differentiation among cities tends to become increasingly *** paper,from the perspective of population mobility,takes provincial capitals and municipalities with independent planning status(PCs&MIPSs)as research samples to evaluate the level of housing price differentiation within provincial-level administrative divisions of China,and analyze from the perspective of demand side how the metropolitanization effects regarding the population formed due to population aggregation in megacities affect the housing prices of megacities and the housing price difference between megacities and other *** research found that:1)The increasing net inflow of population boosts the housing prices and accelerate the housing price differentiation;2)The impact of the increasing net inflow of population on housing price increases and housing price differentiation has regional heterogeneity and city size heterogeneity;3)The income gap strengthens the effect of population inflow upon the housing price differentiation.

关键词： metropolitanization population aggregation housing price differentiation

Biomarkers reveal the terrigenous organic matter enrichment in the late Oligocene-early Miocene marine shales in the Ying-Qiong Basin,South China Sea

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Acta Oceanologica Sinica 2023年第3期42卷 31-53页

作者： Wenjing ding Youchuan Li Lan Lei Li Li Shuchun Yang Yongcai Yang Dujie Hou China National Offshors Oil Corporation(CNOOC)Research Institute Co. Ltd.Beijing 100028China School of Natural Sciences Macquarie UniversitySydney 2109Australia School of Energy Resources China University of GeosciencesBeijing 100083China CNOOC International Limited Beijing 100028China

The increase of total organic carbon content of the late Oligocene-early Miocene terrigenously-dominated marine shales in the shallower depth intervals was reported in the Ying-Qiong Basin,South China *** organic enriched lower Sanya Formation shales(early Miocene)have biomarker characteristics of tropical/subtropical plants,with abundant high molecular weight n-alkanes,angiosperm-derived oleanane,rearranged oleananesⅠ,Ⅱ,Ⅱ,tricyclic/tetracyclic terpanes including des-A-oleanane,X,*,Y,Z,Z1 and bicadinanes W,T,T1,*** biomarker characteristics are suggestive of larger influx of the dominant tropical/subtropical angiosperms in flora under a warming and more humid climate during depositions of the lower Sanya Formation(early Miocene)than the older Lingshui Formation(late Oligocene).The tropical/subtropical angiosperm input was thought as the prime control of terrigenous organic matter enrichment relative to the redox condition,and the coeval sea level changes and seafloor spreading in the South China *** of the terrigenous organic matter in the early Miocene shales is likely in association with the coeval peak East Asian summer monsoon intensity in the South China Sea.

关键词： total organic carbon higher plant-derived biomarkers tropical/subtropical plants East Asian monsoonal climate

Length Scale of Photospheric Granules in Solar Active Regions

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Research in Astronomy and Astrophysics 2022年第8期22卷 103-110页

作者： Yan-Xiao Liu Chao-Wei Jiang ding Yuan Ping-Bing Zuo Wen-Da Cao Institute of Space Science and Applied Technology Harbin Institute of TechnologyShenzhen 518055China New Jersey Institute of Technology Center for Solar ResearchNewarkNJUSA Big Bear Solar Observatory 40386 North Shore LaneBig Bear CityCAUSA

Investigating the length scales of granules could help understand the dynamics of granules in the *** this work,we detected and identified granules in an active region near disk center observed at wavelength of TiO(7057?)by the 1.6 m Goode Solar Telescope(GST).By a detailed analysis of the size distribution and flatness of granules,we found a critical size that divides the granules in motions into two regimes:convection and *** length scales of granules with sizes larger than 600 km follow Gauss function and demonstrate“flat”in flatness,which reveal that these granules are dominated by *** with sizes smaller than 600 km follow power-law function and behave power-law tendency in flatness,which indicate that the small granules are dominated by ***,for the granules in active regions,they are originally convective in large length scale,and directly become turbulent once their sizes turn to small,likely below the critical size of 600 *** with the granules in quiet regions,they evolve with the absence of the mixing motions of convection and *** a difference is probably caused by the interaction between fluid motions and strong magnetic fields in active *** strong magnetic fields make high magnetic pressure which creates pressure walls and slows down the evolution of convective *** walls cause convective granules extending to smaller sizes on one hand,and cause wide intergranular lanes on the other *** small granules isolated in such wide intergranular lanes are continually sheared,rotated by strong downflows in surroundings and hereby become turbulent.

关键词： Sun:granulation Sun:photosphere Sun:faculae plages

Mutual interaction between gut microbiota and protein/amino acid metabolism for host mucosal immunity and health

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Animal Nutrition 2021年第1期7卷 11-16页

作者： Liuting Wu Zhiru Tang Huiyuan Chen Zhongxiang Ren Qi ding Kaiyang Liang Zhihong Sun Laboratory for Bio-feed and Molecular Nutrition College of Animal Science and TechnologySouthwest UniversityChongqing400715China

In recent years,many studies have shown that the intestinal microflora has various effects that are linked to the critical physiological functions and pathological systems of the *** intestinal microbial community is widely involved in the metabolism of food components such as protein,which is one of the essential nutrients in ***,dietary protein/amino acids have been shown to have had a profound impact on profile and operation of gut *** review summarizes the current liter-ature on the mutual interaction between intestinal microbiota and protein/amino acid metabolism for host mucosal immunity and health.

关键词： Gut microbiota Amino acid Metabolism Mucosal immunity Host

Transcriptomic profile of human erythroleukemia cells in response to Sargassum fusiforme polysaccharide and its structure analysis

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Chinese Journal of Natural Medicines 2021年第10期19卷 784-795页

作者： ding Hao-Miao FU Rui-Jie XIE Ce WANG Cai-Sheng QIAN Guo-Ying College of Biological and Environmental Sciences Zhejiang Wanli UniversityNingbo 315100China School of Marine Sciences Ningbo UniversityNingbo 315211China

Sargassum fusiforme(***)has been used as an ingredient in Chinese herbal medicine for thousands of ***,there are a limited number of studies concerning its therapeutic *** performance gel permeation chromatography(HPGPC)analysis showed that the average molecular weight of the *** polysaccharide,SFPS 191212,is 43 *** 191212 is composed of mannose,rhamnose,galactose,xylose,glucose,and fucose(at a molar ratio:2.1:2.9:1.8:15.5:4.6:62.5)withα-andβ-*** present research evaluated the anti-tumor potential of the *** polysaccharide in human erythroleukemia(HEL)cells in *** explore the SFPS 191212’s apoptosis mechanism in HEL cells,transcriptome analysis was performed on HEL cells that were incubated with SFPS *** inhibitory effect of SFPS 191212 on HEL cell growth was also *** was found that SFPS 191212 inhibited HEL cell proliferation,reduced cell viability in a concentration-dependent manner,and induced an insignificant toxic effect on normal human embryonic lung(MRC-5)*** with the control group,transcriptome analysis identified a total of 598 differentially expressed genes(DEGs),including 243 up-regulated genes and 355 downregulated *** Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analyses were performed on all DEGs,and 900 GO terms and 52 pathways were found to be significantly ***,23 DEGs were randomly selected and confirmed by quantitative real-time polymerase chain reaction(qRT-PCR).Moreover,SFPS 191212 down-regulated the PI3K/Akt signal transduction *** results provide a framework for understanding the effect of SFPS 191212 on cancer cells and can serve as a resource for delineating the anti-tumor mechanisms of ***.

关键词： Human erythroleukemia Polysaccharide Sargassum fusiforme Transcriptome

Train probe for beam diagnostics of the SC200 superconducting cyclotron

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Nuclear Science and Techniques 2020年第10期31卷 95-104页

作者： Le-Xing Hu Kai-Zhong ding Yun-Tao Song Yu-Cheng Wu Kai Yao Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Hefei CAS Ion Medical and Technical Devices Co. LtdHefei 230088China

The SC200 proton therapy system commissioned by the Hefei CAS Ion Medical and Technical Devices Co.,Ltd.(HFCIM;Hefei,China)and the Joint Institute for Nuclear Research(JINR;Dubna,Russia)has made significant progress.A main radial beam diagnostic system(MRBDS)equipped with a new type of train probe was developed to satisfy the requirements of beam *** this paper,the detailed design of the mechanical structure and electronics system of the MRBDS is *** electronics system,which includes hardware and software components,was tested and *** results show that measurement errors can be significantly reduced by the designed calibration *** repeatability of the mechanical structure was also verified,and the experimental results indicate that the unidirectional repeatability of the positioning is better than 0.3 ***,the MRBDS was used to measure the phase lag of the particles in the beam,and the results showed a high degree of agreement with theoretical calculations,which proved the applicability and high efficiency of the MRBDS.

关键词： Train probe Beam diagnostic Cyclotron Measurement and calibration Commissioning

Topotactic transition of Ti_(4)AlN_(3) MAX phase in Lewis acid molten salt

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Journal of Materiomics 2023年第6期9卷 1032-1038页

作者： Xinbo Liu Youbing Li Haoming ding Lu Chen Shiyu Du Zhifang Chai Qing Huang Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboZhejiang315201China University of Chinese Academy of Sciences 19 A Yuquan RdShijingshan DistrictBeijing100049China Qianwan Institute of CNiTECH Ningbo315336China

MAX phases and its derived two-dimensional MXenes have attracted considerable interest because of their rich structural chemistry and multifunctional *** acid molten salt route provides an opportunity for structure design and performance manipulation of new MAX phases and MXenes,Although a series of new MAX phases and MXenes were successfully prepared via Lewis acid melt route in recent years,few work is explored on nitride MAX phases and ***,a new copper-based 413-type Ti_(4)CuN_(3)MAX phase was synthesized through isomorphous replacement reaction using Ti_(4)CuN_(3)MAX phase precursor in molten *** addition,it was found that at high temperature Ti4N3Clx MXene will transform into two-dimensional cubic TiNa nanosheets with improved structural stability.

关键词： MAX phases MXenes Two-dimensional titanium nitride Lewis acid route

Influence Mechanism of New-type Urbanization on Urban Land Use Efficiency in the Yangtze River Delta, China

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Chinese Geographical Science 2023年第3期33卷 474-488页

作者： YANG Qingke ding Linlin WANG Lei LIU Chao FAN Yeting LI Ying WANG Yazhu School of Public Administration Nanjing University of Finance&EconomicsNanjing 210023China Key Laboratory of Coastal Zone Exploitation and Protection Ministry of Natural ResourcesNanjing 210017China Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China Faculty of Political Science College of Public AdministrationCentral China Normal UniversityWuhan 430079China

Rapid urbanization in China has led to inefficient use of urban land and spatial structure disorder,attracting attention from academia and *** the Yangtze River Delta,China as an example,this study constructed an index evaluation system that quantitatively analyses the impact of new-type urbanization(NTU)on urban land use efficiency(ULUE)from 2000 to 2020 using a panel data vector autoregressive *** results show that NTU in the Yangtze River Delta promotes ULUE ***,the promotion of NTU to ULUE is limited,and the level of urban economic development also plays a role in promoting the change of ***,the study further analyzed the results of urbanization decomposition and found that population urbanization(PU),economic urbanization(EU),spatial urbanization(SU),and social urbanization(SCU)can explain changes in ULUE in the Yangtze River Delta to a certain *** terms of variance decomposition,PU contributed the most to ULUE,followed by EU,SU,and *** necessary measures should be taken to coordinate the development of different types of urbanization,improve the sustainable utilization level of land resources,and provide a reference for high-quality development in the Yangtze River Delta.

关键词： Urbanization Yangtze Delta

A method to experimentally investigate injection-induced activation of fractures

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第6期12卷 1326-1332页

作者： Changdong ding Yang Zhang Qi Teng Dawei Hu Hui Zhou Jianfu Shao Chuanqing Zhang State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China CNPC Engineering Technology R&D Company Limited Beijing102206China PetroChina Tarim Oilfield Company Korla841000China University of Lille LaMcubeCNRS FRE 201659000LilleFrance

Natural fractures are generally well developed in most hydrocarbon and geothermal reservoirs,which can produce complex fracture networks due to the activation of fractures during hydraulic *** present paper is devoted to developing a method to investigate the activation characteristics of fracture under injection-shearing coupled condition at laboratory *** fluid is injected into the single-fractured granite until the fracture is activated based on the triaxial direct shear *** results show that injection process can significantly influence the shear stress distribution field,resulting in release of shear stress and relative slip between the opposite sides of the fractured *** injectioninduced activation of fracture is strongly dependent on the stress *** the normal stress increases,the injection-induced activation pressure increases,and the comparatively high normal stress can restrain the fracture *** fracture deformation mechanisms during fluid injection are also discussed preliminarily with the experimental *** sensitivity of shear stress to fluid injection increases with increase of shear stress level,while it decreases under high normal *** results can facilitate our understanding of the natural fracture activation behavior during fluid pressure stimulation.

关键词： Natural fracture Fluid injection Induced activation Triaxial direct shear test Hydraulic fracturing

Catalytic effect of a novel MgC0.5Co3 compound on the dehydrogenation of MgH2

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Progress in Natural Science:Materials International 2021年第2期31卷 264-269页

作者： Yaokun Fu Zhenmin ding Lu Zhang Hongming Zhang Wenfeng Wang Yuan Li Shumin Han Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical Engineering Yanshan University State Key Laboratory of Metastable Materials Science and Technology Yanshan University

The application of magnesium hydride(MgH) is limited due to the high reaction temperature and slow kinetics during dehydrogenation. In order to ameliorate the dehydrogenation property of MgH, MgCCocompound with induction and catalytic effects was introduced into the Mg/MgHsystem via ball-milling and hydriding combustion methods in present study. Compared to the pure MgH,the initial hydrogen desorption temperature of MgH–MgCCocomposite lowered to 237°C, decreasing by 141°C. At 325°C the MgH–MgCCocomposite could release 4.38 wt% Hwithin 60 min, which is 4.5 times the capacity of hydrogen released by as milled-MgH. Besides, the hydrogen desorption activation energy of the MgH–MgCCocomposite was dramatically reduced to 126.7 ± 1.4 k J/mol. It was observed that MgCCowas chemically stable and no chemical transformation occurred after cycling, which not only inhibited the nucleation and growth of composite particles, but also had a positive effect on the hydrogen desorption reaction of MgHdue to its catalytic *** study may provide references for designing and synthesizing Mg–C–Co alloy compound for the Mg-based hydrogen storage area.

关键词： Hydrogen storage materials Magnesium hydride Dehydrogenation performance MgC0.5Co3 alloy compound