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| 1 | Pattern and timing of late Cenozoic rapid exhumation and uplift of the Helan Mountain,China显示文摘The Helan Mountain, an intraplate deformation belt in the North China Craton, is located in the northern portion of the China North-South seismic belt, and at the northwestern margin of the Ordos Block. The Cenozoic deformation history of the Helan Mountain is characterized by extension along the eastern Helan Mountain fault (EHSF), resulting in the exhumation and uplift of the Helan Mountain, relative to the rifting of the adjacent Yinchuan Basin. Here we present new apatite fission track (AFT) data from several transects adjacent to the EHSF in the central and northern Helan Mountain. AFT ages from the northern Helan Mountain (Dawukou and Zhengyiguan transects) range from 10 Ma to 89 Ma, whereas AFT ages from the southern Helan Mountain (Suyukou transect) are greater than 71 Ma. The AFT data analysis reveals initiation of rapid uplift and exhumation of the Helan Mountain at 10–12 Ma. Additionally, a plot of the AFT ages versus their mean track length shows a distinctive 'boomerang' pattern indicating that the Helan Mountain experienced a discrete phase of accelerated exhumation beginning at 10-12 Ma. Spatially, AFT samples systematically increase in age away from the EHSF and are consistent with late Cenozoic exhumation that was slow in the southwestern Helan Mountain and rapid in the northeastern Helan Mountain, as well more rapid adjacent to the EHSF and slower away from the EHSF. Obviously, the spatial distribution of late Cenozoic exhumation indicates that normal faulting of the EHSF is related to southwestward tilting and rapid exhumation of the Helan Mountain beginning at 10–12 Ma. The uplift and exhumation of the Helan Mountain was a response to the intensive extension of the northwestern margin of the Ordos Block in the late Cenozoic; this occurred under a regional extensional stress field oriented NW-SE along the Yinchuan-Jilantai-Hetao and the Weihe-Shanxi graben systems adjacent to the Ordos Block. | LIU JianHui ZHANG PeiZhen ZHENG DeWen WAN JinLin WANG WeiTao DU Peng LEI QiYun | 2010 | Science China Earth Sciences2010，53，3： | 23 |
| 2 | Terrestrial flux in sediments from the Okinawa Trough estimated using geochemical compositional data and its response to climate changes over the past 35000 a显示文摘Terrestrial supply to marginal seas is a function of interaction between land and ocean in response to climate changes.Terrestrial flux in sediments,therefore,is potential not only to reflect the paleoceanographic evolution of sedimentary basin,but also to reveal the paleoclimatic changes in source regions.Sediments from the Okinawa Trough were quantitatively partitioned into terrestrial,volcanic and biogenitic end members using constrained least-squares technique for geochemical compositional data.Combined with the density of bulk sediments and sedimentation rate,the terrestrial flux in sediments from the Okinawa Trough since the last 35 000 a was estimated.Based on surface seawater temperature(SST) and sea level changes over the past 35 000 a,the response of terrestrial flux to the climate changes was discussed.It is demonstrated that the terrestrial supply to the Okinawa Trough mainly derived from Chinese landmass via the Changjiang(Yangtze) River and controlled by sea level changes.During the post-glaciation,the terrestrial flux was the lowest in response to the highest sea level stand.During the last glacial maximum(LGM),the terrestrial flux was not so high as previously expected,indicating the arid climatic condition in source region was responsible for lowering the Changjiang River's runoff during that time.During the deglaciation,the terrestrial flux increased in response to a quick rising of the sea level,probably implicating occurrence of down-slope transport.The four events characterized by slight increase in terrestrial flux exactly correspond to the LGM,Heinrich events(H1,H2,H3),respectively. | MENG Xianwei LIU Yanguang DU Dewen SHI Xuefa | 2009 | Acta Oceanologica Sinica2009，28，1： | 5 |
| 3 | Geochemistry of trace elements and Sr-Nd isotopes of foraminifera shell from the Okinawa Trough显示文摘Trace elemental associations and Sr-Nd isotopic compositions are of important to recognition of biogenic material from mixed marine sediments. The foraminifera shell from the Okinawa Trough strongly enriches Sr,P,Mn and Ba, enriches Li,U,Th,Sc,Co,Cu,Pb,Zn,Cr,Rb,Y,Sb and light rare earth elements,slightly enriches V,Ga,Zr,Nb,Cd and middle rare earth elements,is short of Mo,In,Sn,Cs,Hf,Ta,W,Ti,Bi and heavy rare earth elements. The mechanism of elemental enrichment in forminifera is the concentrations of trace elements in sea water and selective absorption of trace elements during foraminifera living, as well as the geochemical affinity between major elements and trace elements.The REE (rare earth elements)partition pattern of foraminifera shell of the Okinawa Trough shows enrichment of middle rare earth elements with slightly negative Ce anomaly,which are different from those of foraminifera of the Pacific Ocean.The Sr,Nd isotopic ratios of the Okinawa Trough foraminifera are 0 709 769 and 0 512 162,respectively, which are different not only from those of oceanic water, but also from those of river water of China’s Mainland, the former is slightly higher than those of oceanic water,but much lower than those of river water;the latter is slightly lower than those of oceanic water,but higher than those of river water,demonstrating that the Okinawa Trough sea water has been influenced by river water of China’s Mainland. | Meng Xianwei 1,2 ,Du Dewen 1,2 ,Cheng Zhenbo 11 .FirstInstituteofOceanography ,StateOceanicAdministration ,Qingdao 2 6 6 0 6 1,China2 .KeyLaboratoryofMarineScienceandNumericalModeling ,StateOceanicAdministration ,Qingdao 2 6 6 0 6 1,China | 2001 | Acta Oceanologica Sinica2001，20，1： | 4 |
| 4 | Holocene tephra deposits in the northern Okinawa Trough显示文摘The mineralogical and geochemical characteristics of sediments of Core CSH1, which was collected from the northern Okinawa Trough, indicate that large amounts of volcanic materials have deposited in the northern Okinawa Trough during the Holocene. On the basis of down-core variations in mineral and element contents of sediments, two layers in the uppermost section of Core CSH1 charac- terized by high quartz, Na2O, MnO, K2O, uranium contents and low contents of clay minerals, volatiles, Fe2O3, MgO, CaO and stron- tium, have been identified as the tephra deposits. Systematic grain-size measurements also suggest that sediments from the northern Okinawa Trough are made up of terrigenous materials and volcanic ashes with different proportion during the Holocene. The sedi- ments of tephra layers in Core CSH1 show bi-modal patterns in grain-size distribution with modal grain-sizes of 74.3 and 7.81 μm, respectively. According to the radiocarbon dating on shells of zooplankton foraminifera, two tephra layers in Core CSH1, formed at 7 250 and 10 870 a BP (cal), approximately correspond to the K-Ah tephra [7 300 a BP (cal)] and the eruption of Kuju Volcano (12￣10 ka BP), respectively. | LIU Yanguang OLE BjФrslev Nielsen ZHANG Deyu DU Dewen JAN Heinemeier WU Yonghua | 2006 | Acta Oceanologica Sinica2006，25，1： | 4 |
| 5 | Fuzzy ARTMAP neural network for seafloor classification from multibeam sonar data显示文摘 | 周兴华 Chen Yongqi Nick Emerson Du Dewen | 2006 | High Technology Letters2006，12，2： | 2 |
| 6 | Effect of Ti-enriched Carbonitride on Microstructure and Mechanical Properties of X80 Pipeline Steel显示文摘In this study,two API X80 pipeline steels were fabricated by varying Ti additions,and their microstructures and fracture characteristics were analyzed to investigate the effects of Ti-enriched carbonitride on the tensile properties and Charpy impact properties.Lathy bainite,a mass of matensite/austenite(M/A),coarse cubic Ti-enriched inclusions,chain-typed Ti-enriched precipitations,weak toughness and high tensile strength were found as consequences of higher amount of Ti content.Those large scale and chain-typed Ti-enriched carbonitrides are one kind of crack sources during fracture.The negative effect of higher amount of Ti on the impact properties is increased with decreased temperature. | Wei Deng,Xiuhua Gao,Dewen Zhao,Linxiu Du,Di Wu and Guodong Wang State key laboratory of rolling and automation,Northeastern University,Shenyang 110819,China | 2010 | Journal of Materials Science & Technology2010，26，9： | 2 |
| 7 | Effect of boron addition on the microstructures and mechanical properties of thermomechanically processed and tempered low carbon bainitic steels显示文摘Thermomechanical process and tempering heat treatment were employed to produce the experimental steel plates. The effect of boron addition on the microstructure and mechanical properties of low carbon bainitic steels was studied in this paper. Microstructure observation and crystallographic features were conducted by using optical microscopy, SEM, TEM and electron back scattering diffraction (EBSD) analysis. The results showed that under the same rolling processes and heat treatment conditions, a substantial increase in strength is obtained by addition of boron into steel, but accompanied by an obvious drop in toughness. New martensite phase forms along the grain boundaries on tempering at 650 C mainly due to boron segregation, which can further deteriorate impact toughness of the boron bearing steel. The EBSD analysis showed that high angle grain boundary is not responsible for the deteriorated toughness of the boron bearing steel because it has relatively higher percentage of high angle grain boundary than the boron free steel. The low toughness of the boron bearing steel is mainly attributed to the coarse boride precipitated particles according to the results of fractograph observation. | Liangyun LAN Chunlin QIU Ping ZHOU Dewen ZHAO Canming LI Xiuhua GAO Linxiu DU | 2011 | Acta Metallurgica Sinica(English Letters)2011，24，6： | 2 |
| 8 | An analytical solution for tube sinking by strain rate vector inner-product integration显示文摘 | ZHAO Dewen DU Haijun WANG Genii | 2009 | Journal of Materials Processing Technology2009，209，1： | 1 |
| 9 | Distributions of surface sediments surrounding the Antarctic Peninsula and its environmental significance显示文摘We analyzed grain size composition to provide information on the types and distributions as well as depositional varieties of marine surface sediments from the area surrounding the Antarctic Peninsula. The samples retrieved from the study area contain gravel, sand, silt and clay. As suggested by bathymetry and morphology, the study area is characterized by neritic, hemipelagic and pelagic deposits. The glacial-marine sediments can be divided into two types, residual paratill and compound paratill, which are primarily transported by glaciers and as ice-rafted debris. Ocean current effects on deposition are more obvious, and the deposit types are distributed consistently with terrain variations. | WANG Chunjuan CHEN Zhihua LI Chunshun DU Dewen YAN Shijuan ZHU Zhiwei | 2014 | Advances in Polar Science2014，25，3： | 1 |
| 10 | Geochemical characteristics of REEs and Sr, Nd isotopes of hydrothermal chimney and their geological significance in the Okinawa Trough显示文摘THIS note first researches the geochemical characteristics of rare earth elements (REEs) and Sr and Ndisotopes of hydrothermal chimney in the middle Okinawa Trough. On this basis, the sources of mineralforming material and mechanisms of mineralization are discussed. 1 Analysis methods and results A hydrothermal chimney was obtained from theIsuzu depression in the middle Okinawa Trough andsamples for analysis were handpicked from chimney.Four samples belong to two types of ores, respectively,in which samples 360-1, 360-5 and 360-8 are of Cu-Znsulfide type and 159H is of barite-amorphous SiO2type. REEs were analyzed by TQ-TURBO II ICP- | MENG Xianwei, CHEN Zhihua and DU Dewen First Institute of Oceanography, State Oceanic Administration, Qingdao 266003, China | 1999 | Chinese Science Bulletin1999，44，S2： | 1 |
| 11 | Microstructural Evolution and Toughness in the HAZ of Submerged Arc Welded Low Welding Crack Susceptibility Steel显示文摘Microstructural characteristics of different sub-regions of heat affected zone (HAZ) of low welding crack susceptibility steel weldment were investigated by using optical microscopy and scanning electron microscopy equipped with electron backscattered diffraction system. And the focus was put on the correlation between microstructural characteristics and HAZ toughness of the weldment. The results reveal that the toughness of fusion line zone (FLZ) specimens is much lower than that of fine grained HAZ (FGHAZ) specimens. The coarse inclusions in the weld metal and the large martensite-austenite constituents in the coarse grained HAZ (CGHAZ) have an obvious negative effect on the crack initiation energy of FLZ. Meanwhile, the coarse granular bainite with large effective grain decreases the crack propagation energy seriously. By contrast, fine crystallographic grains in the FGHAZ play a key role in increasing toughness, especially in improving crack propagation energy. | Chunlin QIU Liangyun LAN Dewen ZHAO Xiuhua GAO Linxiu DU | 2013 | Acta Metallurgica Sinica(English Letters)2013，26，1： | 1 |
| 12 | Regional Disparity and Economic Growth in China The Impact of Labor Market Distor-tions显示文摘 | Fang Cai Dewen Wang Yang Du | 2002 | China Economic Review2002，，13： | 1 |
| 13 | Regional Disparity and Economic Growth in China The Impact of Labor Market Distortions显示文摘 | Fang Cai Dewen Wang Yang Du | 2002 | China Economic Review2002，，13： | 1 |
| 14 | Analytical Solution for Three-dimensional Forging Taking into Account Bulging of Sides by Mean Yield Criterion显示文摘Currently, for some complex plastic deformations, the analytical solution can not be obtained by using Mises yield criterion, because Mises yield criterion is nine dimensions, the velocity field is complex, and the solving methods are not innovative. Corresponding solutions of these problems are that yield criterion is linearized to reduce the variable numbers, and the velocity field and the solving methods are reasonably simplified, respectively. In this paper, a new linear yield criterion—mean yield(MY) criterion and inner-product of strain rate vector are used to analytically solve 3D forging taking into account bugling of sides. The velocity field is expressed as a vector in three dimensions, and rotation and divergence are applied to confirm that the velocity field is kinematically admissible. Then, the corresponding strain rate tensor of the velocity field is transformed into principal one by making the determinant of coefficients of the tensor cubic equation be zero. By using MY criterion, the plastic power is term by term integrated and summed according to inner-product of strain rate vector. An upper bound analytical solution is obtained for the forging, and verified by a pure lead press test. The test result turns out that the total pressure calculated by MY criterion is higher by 2.5%?15% than measuring value. In addition, a measuring formula of bulging parameter (a) is proposed, but the values of a measured by the formula are lower than those optimized by the golden section search. The total pressure calculated by MY criterion is compared with the ones by twin shear, Trasca yield, and Mises yield criterion. The comparing result shows that the total pressure calculated by MY criterion is slightly higher than the mean value of that by twin shear and Trasca yield criterion, and lower than that by Mises yield criterion, but more close to that by Mises yield criterion compared with that by other two. The proposed analytical solving methods can be effectively used to other complex plastic deformation, simplifying the solving process and obtaining the reasonable results. | DU Haijun ZHAO Dewen WANG Genji WANG Guodong | 2010 | Chinese Journal of Mechanical Engineering2010，23，4： | 1 |
| 15 | Regional disparity and economic growth in Chins The impact of labor market distortions 显示文摘 | Dewen WANG Yang DU | 2002 | China Economic Review2002，13，： | 1 |
| 16 | Regional Disparity and Economic Growth in China: The Impact of Labor Market Distortions 显示文摘 | Fang Cai Dewen Wang Yang Du | 2002 | China Eco- nomic Review2002，，13： | 1 |
| 17 | Regional dis- parity and economic growth in China: the impact of la- bor market distortions 显示文摘 | CAI Fang WANG Dewen DU Yang | 2002 | China Economic Review2002，13，23： | 1 |
| 18 | Author correction to‘Protective effects of VMY-2-95 on corticosterone-induced injuries in mice and cellular models’[Acta Pharmaceutica Sinica B 11(2021)1903-1913]显示文摘The authors regret that there was a picture error in Fig.5F owing to the inappropriate data statistics—forgetting gating when data collecting and a picture error in Fig.6F owing to the data copy mistake when drawing the column chart.The revisions cause some changes with the data value. | Ziru Yu Dewen Kong Yu Liang Xiaoyue Zhao Guanhua Du | 2023 | Acta Pharmaceutica Sinica B2023，13，2： | 0 |
| 19 | Integration of metabolomics and transcriptomics revealed the biosynthetic mechanism of anti-parasitic compounds in Salinivibrio proteolyticus strain YCSC6显示文摘The fermentation broth of Salinivibrio proteolyticus strain YCSC6 shows potent anti-parasitic activity against Uronema marinum,with activity varying in each fermentation stage.To investigate the biosynthetic mechanism of anti-parasitic compounds in strain YCSC6,a comprehensive analysis of metabolomics and transcriptomics over four diff erent time points(12,24,48,and 72 h)was performed.Metabolomics detected 17943 metabolites with 1129 known metabolites.A trend analysis of the known metabolites showed that 575 metabolites,including 69 polyketides,were continuously enhanced,being the potential source of anti-parasitic agents.In addition,941 genes mapped to the same pathways of these metabolites,were screened through the association analysis of metabolites and genes.KEGG pathway enrichment of these genes showed 270 genes mapped to the biosynthesis of secondary metabolites and 192 genes mapped to the biosynthesis of antibiotics.This demonstrates the potent secondary metabolic capacity of strain YCSC6.Finally,a gene-metabolite correlation network was created based on the 575 continuously enhanced metabolites and 43 continuously up-regulated genes.This revealed 13 genes at the key position that mapped to a putative metabolic pathway associated with the biosynthesis of polyketides and caprylic acid,which contributes to the potent anti-parasitic activity of strain YCSC6.This comprehensive analysis of metabolomics and transcriptomics provides insights into the biosynthetic mechanisms of anti-parasitic compounds in strain YCSC6 and guides the exploitation of more anti-parasitic agents for aquaculture. | Guangxun DU Lingyun QU Ping GAO Wenhao HUANG Chenghua LI Dewen DING | 2022 | Journal of Oceanology and Limnology2022，40，1： | 0 |
| 20 | A Study on the Sustainability and the Reform of Current Endowment Insurance Mode显示文摘Ⅰ. Current Situation and Prospect of Population Aging China has successfully realized the transformation of population reproduction pattern in a relatively short period; and the age structure of its population has changed accordingly, resulting in | Cai Fang Zhang Juwei Zheng Zhenzhen Zhang Yi Du Yang Wang Dewen Zhang Zhanxin | 2007 | China Population Today2007，24，5： | 0 |
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