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| 1 | Mechanical property of artificial methane hydrate under triaxial compression显示文摘Methane production from hydrate reservoir may induce seabed slide and deformation of the hydrate-bearing strata.The research on mechanical properties of methane hydrate is considered to be important for developing an efficient methane exploitation technology.In this paper,a triaxial test system containing a pressure crystal device was developed with the conditions to stabilize the hydrate.A series of triaxial shear tests were carried out on artificial methane hydrate specimen.In addition,mechanical characteristics of methane hydrate were studied with the strain rates of 0.1 and 1.0 mm/min,respectively,under the conditions of different temperatures(T =-5,-10,and-20 ℃) and confining pressures(P = 0,5,10,15,and 20 MPa).The preliminary results show that when the confining pressure was less than 10 MPa,the increase of confining pressure leaded to the enhancement of shear strength.Furthermore,the decreasing temperature and the increasing strain rate both caused the increase in shear strength. | Yongchen Song Feng Yu Yanghui Li Weiguo Liu Jiafei Zhao | 2010 | Journal of Natural Gas Chemistry2010，19，3： | 28 |
| 2 | Earthquake-related Tectonic Deformation of Soft-sediments and Its Constraints on Basin Tectonic Evolution显示文摘The authors introduced two kinds of newly found soft-sediment deformation-syn-sedimentary extension structure and syn-sedimentary compression structure,and discuss their origins and constraints on basin tectonic evolution.One representative of the syn-sedimentary extension structure is syn-sedimentary boudinage structure,while the typical example of the syn-sedimentary compression structure is compression sand pillows or compression wrinkles.The former shows NW-SE-trending contemporaneous extension events related to earthquakes in the rift basin near a famous Fe-Nb-REE deposit in northern China during the Early Paleozoic(or Mesoproterozoic as proposed by some researches),while the latter indicates NE-SW-trending contemporaneous compression activities related to earthquakes in the Middle Triassic in the Nanpanjiang remnant basin covering south Guizhou,northwestern Guangxi and eastern Yunnan in southwestern China.The syn-sedimentary boudinage structure was found in an earthquake slump block in the lower part of the Early Paleozoic Sailinhudong Group,20 km to the southeast of Bayan Obo,Inner Mongolia,north of China.The slump block is composed of two kinds of very thin layers—pale-gray micrite(microcrystalline limestone)of 1?2 cm thick interbedded with gray muddy micrite layers with the similar thickness.Almost every thin muddy micrite layer was cut into imbricate blocks or boudins by abundant tiny contemporaneous faults,while the interbedded micrite remain in continuity.Boudins form as a response to layer-parallel extension(and/or layer-perpendicular flattening)of stiff layers enveloped top and bottom by mechanically soft layers.In this case,the imbricate blocks cut by the tiny contemporaneous faults are the result of abrupt horizontal extension of the crust in the SE-NW direction accompanied with earthquakes.Thus,the rock block is,in fact,a kind of seismites.The syn-sedimentary boudins indicate that there was at least a strong earthquake belt on the southeast side of the basin during the early stage of the Sailinhudong Group.This may be a good constraint on the tectonic evolution of the Bayan Obo area during the Early Paleozoic time.The syn-sedimentary compression structure was found in the Middle Triassic flysch in the Nanpanjiang Basin.The typical structures are compression sand pillows and compression wrinkles.Both of them were found on the bottoms of sand units and the top surface of the underlying mud units.In other words,the structures were found only in the interfaces between the graded sand layer and the underlying mud layer of the flysch.A deformation experiment with dough was conducted,showing that the tectonic deformation must have been instantaneous one accompanied by earthquakes.The compression sand pillows or wrinkles showed uniform directions along the bottoms of the sand layer in the flysch,revealing contemporaneous horizontal compression during the time between deposition and diagenesis of the related beds.The Nanpanjiang Basin was affected,in general,with SSW-NNE compression during the Middle Triassic,according to the syn-sedimentary compression structure.The two kinds of syn-sedimentary tectonic deformation also indicate that the related basins belong to a rift basin and a remnant basin,respectively,in the model of Wilson Cycle. | LU Hongbo ZHANG Yuxu ZHANG Qiling XIAO Jiafei | 2006 | Acta Geologica Sinica(English Edition)2006，80，5： | 13 |
| 3 | Global transcriptome analysis for identification of interactions between coding and noncoding RNAs during human erythroid differentiation显示文摘在 erythroid 开发期间编码基因, miRNAs,和 lncRNAs 上的研究在最近的年里被执行了。然而,集中于三种 RNA 类型的集成的分析还得被做。在现在的学习,我们比较了编码基因, miRNA,和 lncRNA 表示侧面的动力学。为了在在 transcriptome 控制这些变化的红血球生成和潜在的机制探索动态变化,铺平,我们利用了定序技术从绳索血获得 transcriptome 数据的高产量造血的干细胞和下列四个 erythroid 区别阶段,以及从成熟的红血房间。结果显示 lncRNAs 为 erythroid 区别正在答应房间标记候选人。聚类分析分类差别表示基因进在 stemness 维护期间对应于动态变化的四种子类型,中间区别,并且成熟。综合分析揭示了 RNA 潜在地参予了控制血细胞成熟的那 noncoding,并且特别与到氧种类和 DNA 损坏的 heme 新陈代谢和回答联系了。这些规章的相互作用在一个全面网络,在 RNA 之间的从而推断的关联和他们的联系功能被显示。这些数据为正常红血球生成的学习提供了一个大量的资源,它将允许 erythroid 开发的进一步的调查和理解并且获得 erythroid 混乱。 | Nan Ding Jiafei Xi Yanming Li Xiaoyan Xie Jian Shi Zhaojun Zhang Yanhua Li Fang Fang Sihan Wang Wen Yue Xuetao Pei Xiangdong Fang | 2016 | Frontiers of Medicine2016，10，3： | 6 |
| 4 | Paleoceanographic Indicators for Early Cambrian Black Shales from the Yangtze Platform, South China: Evidence from Biomarkers and Carbon Isotopes显示文摘The lower Cambrian Niutitang Formation, a widespread black shale deposition, is of geological interest because of its polymetallic beds, Cambrian explosion, depositional ages, dramatic environmental changes and so on. Previous study focused mainly on inorganic geochemistry and few studies have investigated the organic fractions of upper Neoproterozoic-lower Cambrian strata in South China. Here we report a study of biomarkers plus organic carbon isotopes for black shales from Ganziping, Hunan Province (China). All the saturated hydrocarbon fractions have a unimodal distribution of n-alkanes, a high content of short-chain alkanes and maximize at C 19 or C 20 (C 23 for sample Gzh00-1). The C 27 /C 29 sterane ratio ranges from 0.77 to 1.20 and 4-methylsteranes are in low abundance. These parameters indicate that algae and bacteria are the important primary producers. Furthermore, biomarker maturity proxies show the samples to be higher maturity. The low Pr/Ph values (<0.7) suggest that the samples were deposited under anoxic conditions and, likely, under stratified water columns. In addition, 25-norhopanes and gammacerane are present as diagnostic indicators of normal marine salinity and dysoxic to anoxic conditions. During the Early Tommotian, known to coincide with a transgression event, small shelly fossils increased in abundance and diversity. Moreover, positive δ 13 C org excursions close to 1.4‰ occur at the base of the Tommotian stage. In summary, the Early Cambrian black shales were deposited under dramatic paleoenvironmental changes, including oceanic anoxia, higher primary productivity and sea-level rise. | CHEN Lan ZHONG Hong HU Ruizhong XIAO Jiafei TSAI Louis Loung-Yie LIN Andrew Tien-Shun ZOU Yanrong | 2012 | Acta Geologica Sinica(English Edition)2012，86，5： | 6 |
| 5 | On emplacement ages of lam-proites in Zhenyuan County,Guizhou Province,China显示文摘Emplacement ages of lamproites that comprise lamproite and olivine lamproite in Zhenyuan County, Guizhou Province, China, have been constrained by the whole-rock Sm-Nd and Rb-Sr isochron methods and the whole rock K-Ar method. Intrusive activities of lamproites in the Sinantang area of Zhenyuan County, Guizhou Province, took place during the Late Cambrian, as indicated by the Sm-Nd isochron ages (t) = (503±17) (2σ) Ma and by the Rb-Sr isochron ages (t) = (501.2±4.6) (2σ) Ma. Intrusive activities of olivine lamproites at the Maping with Ⅱ -type diamond and Xitou in Zhenyuan County, Guizhou Province, took place from the Late Cambrian to the Early Ordovician, as evidenced by the Sm-Nd isochron ages (t) = (502±27) (2σ) Ma and by the Rb-Sr isochron age (t) = (502± 27) (2σ) Ma. This suggests that the upwelling hot materials derived from the deep mantle were emplaced from the Late Cambrian to the Early Ordovician (503-497 Ma), while the time terminal of cooling of the geothermal event of | Weixuan Fang Ruizhong Hu Wenchao Su Jiafei Xiao Liang Qi Guohao Jiang | 2002 | Chinese Science Bulletin2002，47，10： | 5 |
| 6 | Emplacement Ages and Geochemical Characteristics of Grabbroic Intrusions and Prospecting Orientation of Related Deposit in Luodian,Guizhou Province显示文摘炮兵阵地年龄, geochemical 特征和在 Luodian 县的 gabbroic 侵入上的大陆人动力学的分析,贵州省,基于同位素的年表(整个岩石的 Sm-Nd 和 Rb-Sr isochron 方法) 的研究被讨论了,主要元素,踪迹元素和 PGE。在学习区域的 gabbroic 侵入的恼人的活动发生在迟了的 Yanshanian Orogenic 运动(白垩纪时期) 期间,由 Sm-Nd isochron 年龄(t)= 显示了 99.6 # | FANG Weixuan HU Ruizhong SU Wenchao XIAO Jiafei | 2008 | Acta Geologica Sinica(English Edition)2008，82，4： | 5 |
| 7 | In-situ observation for formation and dissociation of carbon dioxide hydrate in porous media by magnetic resonance imaging显示文摘The study of formation and dissociation of CO 2 hydrate in porous media was characterized by magnetic resonance imaging (MRI) system in in situ conditions. This work simulated porous media by using glass beads of uniform size. The growth and dissociation habit of CO2 hydrate was observed under different temperature and pressure conditions. The induction time and the hydrate saturation during the growth and dissociation process in different sizes of porous media were obtained by using the MRI signal intensity. The results indicate that hydrate growth rate and the induction time are affected by the size of porous media, pressure, and degree of supercooling. There are three hydrate growth stages, i.e., initial growth stage, rapid growth stage and steady stage. In this study,the CO2 hydrate forms preferentially at the surface of vessel and then gradually grows inward. The hydrate tends to cement the glass beads together and occupies the pore gradually. As the hydrate decomposes gradually, the dissociation rate increases to the maximum and then decreases to zero. | CHENG ChuanXiao ZHAO JiaFei SONG YongChen ZHU ZiHao LIU WeiGuo ZHANG Yi YANG MingJun YU XiChong | 2013 | Science China Earth Sciences2013，56，4： | 5 |
| 8 | Phosphorite generative processes around the Precambrian-Cambrian boundary in South China: An integrated study of Mo and phosphate O isotopic compositions显示文摘Large phosphorite deposits in Central Guizhou,China,were formed around the Precambrian/Cambrian boundary(PC/C),including the Ediacaran(Doushantuo stage)and early Cambrian(Gezhongwu stage).Among them,Gezhongwu phosphorite from Zhijin are enriched in rare earth elements(REE)plus yttrium(REY),reaching 3.503 million tons.Although phosphorites have attracted great attention,the specific sources P and REY remained unclear.To determine the P and REY sources and establish a phosphogenic model of PC/C phosphorite,we present an integrated dataset of Mo and phosphate O isotopes for the first time,along with carbonate C and O isotopes,geology,petrology,and geochemistry.In all samples,d18Op,Y/Ho,and Zr/Hf decreased from the Ediacaran to the early Cambrian,indicating increased terrigenous weathering fluxes while decreased upwelling water input.Furthermore,terrigenous weathering delivery significantly elevated marine REY concentrations in the Cambrian in Zhijin.The Ceanom and d98/95Mo suggest that seawater was oxidized in the later Ediacaran and became entirely oxic in the early Cambrian.The positive feedback between oxygen levels in atmosphere and primary productivity caused progressive oxygenation in ocean-atmosphere system and enable phosphorites to be formed by different mechanisms.Results show that the Lower Doushantuo consist of abiotic intraclasts and exhibited“seawaterlike”REY types,indicating abiological and mechanical reworking phosphogenesis.The Upper Doushantuo and Gezhongwu Formation contained mainly microbial debris and abiogenic intraclasts,and exhibit “hat-shaped”REY plots,suggesting microbially mediated phosphogenesis.Based on this data set,we developed a phosphogenic model illustrating formation of these two phosphorite deposits,wherein the Lower Doushantuo phosphorite formed through the reworking of pre-existing phosphatic sediments in anoxic and abiotic ocean,whereas the Upper Doushantuo and Gezhongwu phosphorite formed via microbial metabolisms in oxic and biotic conditions.Our study has implications on the PC/C phosphorite generative processes,as well as paleoenvironmental conditions. | Haiying Yang Jiafei Xiao Yong Xia Zhuojun Xie Qinping Tan Jianbin Xu Shan He Shengwei Wu Xiqiang Liu Xingxiang Gong | 2021 | Geoscience Frontiers2021，12，5： | 5 |
| 9 | The emplacement mechanisms and growth styles of the GuposhanHuashan batholith in western Nanling Range, South China显示文摘The Guposhan-Huashan batholith was emplaced during transition from Tethysian tectonic regime to Pacific tectonic regime in the Middle-Late Jurassic. The regional EW-striking Yishan-Quannan basement deep fault zone, associated with the Tethysian regime, is thought likely to control the formation of the batholith. The development of the batholith was, however, achieved when the Pacific tectonic extensional regime dominated. The batholith consists of seven individual intrusive units that were emplaced subsequently over a 15 m.y. span. Deformation structures and strain analysis of the intrusive units and their country rocks suggest the existence of active and passive emplacement mechanisms. For example, shape-preferred orientation of dioritic enclaves and megacrystic K-spars within earlier units and the development of rim synforms resulted from active mechanisms. It is estimated that active expansion and structural propagation each contributed approximately 27%, and stoping accounted for 46% of the space for the entire batholith. The active emplacement mechanisms produced earlier units at deeper levels of the crust and followed by passive emplacement mechanism at shallower crustal levels when the tectonic regime changed from compression to extension. Each intrusive unit shows a different growth mode. Niumiao and Yangmeishan intrusions show a polarized lateral growth mode, the main-phase Lisong and Wanggao intrusions show either a central growth mode or an eccentric growth mode, and the youngest Baishuidai and Huamei units have a polarized multi-point central growth mode. Both Guposhan and Huashan plutons show a concentric growth zoning pattern with the former built in an outward growth style and the latter an inward growth style. The well-preserved circular shape of both plutons is indicative of relatively stationary magma feeders, suggesting that any considerable horizontal displacement in the region was unlikely even if the area was in an intracontinental strike-slip tectonic setting during the last emplacement phases of the batholith. | FENG ZuoHai WANG ChunZeng LIANG JinCheng LI JunZhao HUANG YongGao LIAO JiaFei WANG Rui | 2011 | Science China Earth Sciences2011，54，1： | 5 |
| 10 | Forced Convection Heat Transfer in Porous Structure: Effect of Morphology on Pressure Drop and Heat Transfer Coefficient显示文摘A light-weight structure with sufficient mechanical strength and heat transfer performance is increasingly required for some thermal management issues.The porous structure with the skeleton supporting the ambient stress and the pores holding the flowing fluid is considered very promising,attracting significant scientific and industrial interest over the past few decades.However,due to complicated morphology of the porous matrices and thereby various performance of the pressure drop and heat transfer coefficients (HTC),the comprehensive comparison and evaluation between different structures are largely unclear.In this work,recent researches on the efforts of forced convection heat transfer in light-weight porous structure are reviewed;special interest is placed in the open-cell foam,lattice-frame,structured packed bed,and wire-woven structures.Their experimental apparatus,morphological of the porous structures,effect of morphology on pressure drop and HTC,and further applications are discussed.The new method which measure morphology accurately should be paid more attention to develop more accuracy correlation.Also,the most research focused on low Reynolds number and existing structure,while very few researchers investigated the property of forced convection heat transfer in high velocity region and developed new porous structure. | ZHAO Jiafei SUN Mingrui ZHANG Lunxiang HU Chengzhi TANG Dawei YANG Lei SONG Yongchen | 2021 | Journal of Thermal Science2021，30，2： | 4 |
| 11 | Well-construction of Zn_(2)SnO_(4)/SnO_(2)@ZIF-8 core-shell hetero-structure with efficient photocatalytic activity towards tetracycline under restricted space显示文摘Nowadays,efficient removal of antibiotic(e.g.tetracycline,TC) from water bodies has been of great global concern.Hereby,a novel Zn_(2)SnO_(4)/SnO_(2)@ZIF-8 photo-catalyst was first synthesized by a facile selfassembly in-situ growth method.Zn_(2)SnO_(4)/SnO_(2)@ZIF-8 exhibits a remarkable photocatalytic activity towards TC under visible-light driven with a rapid rate constant of 1.5 × 10^(-2)min^(-1), and a removal efficiency of 81.2%,which is superior to some catalysts in the literature.Importantly,the photocatalytic activity of Zn_(2)SnO_(4)/SnO_(2)@ZIF-8 could still remain ~77% after the fifth cycle,indicating its good stability and reusability.The remarkable performances of adsorption and photocatalytic were attributed to associative effects of catalytic activity of Zn_(2)SnO_(4)/SnO_(2)and the unique porous nanostructure and stability of ZIF-8.This work could aid the future design and preparation of novel MOFs composite catalysts for efficient elimination of antibiotics from water. | Jiafei Wu Yuning Jin Danping Wu Xiaoying Yan Na Ma Wei Dai | 2022 | Chinese Journal of Chemical Engineering2022，，12： | 3 |
| 12 | High-purity magnesium pin enhances bone consolidation in distraction osteogenesis via regulating Ptch protein activating Hedgehog-alternative Wnt signaling显示文摘Magnesium alloys are promising biomaterials for orthopedic implants because of their degradability,osteogenic effects,and biocompatibility.Magnesium has been proven to promote distraction osteogenesis.However,its mechanism of promoting distraction osteogenesis is not thoroughly studied.In this work,a high-purity magnesium pin developed and applied in rat femur distraction osteogenesis.Mechanical test,radiological and histological analysis suggested that high-purity magnesium pin can promote distraction osteogenesis and shorten the consolidation time.Further RNA sequencing investigation found that alternative Wnt signaling was activated.In further bioinformatics analysis,it was found that the Hedgehog pathway is the upstream signaling pathway of the alternative Wnt pathway.We found that Ptch protein is a potential target of magnesium and verified by molecular dynamics that magnesium ions can bind to Ptch protein.In conclusion,HP Mg implants have the potential to enhance bone consolidation in the DO application,and this process might be via regulating Ptch protein activating Hedgehog-alternative Wnt signaling. | Musha Hamushan Weijie Cai Yubo Zhang Zun Ren Jiafei Du Shaoxiang Zhang Changli Zhao Pengfei Cheng Xiaonong Zhang Hao Shen Pei Han | 2021 | Bioactive Materials2021，6，6： | 3 |
| 13 | Lead isotope geochemical characteristics of Pb-Zn-Cu deposits on the southwestern margin of Tarim,and their significance显示文摘The polymetallic(Pb,Zn,Cu,etc) ore belt on the southwestern margin of Tarim is one of the major regions with the greatest prospecting potential in Xinjiang.Reported in this paper are the lead isotope data for 66 sulfide samples(including 50 galena samples,15 chalcopyrite samples and 1 pyrite sample) collected from such representative deposits as Tamu,Tiekelike,Kalangu,Abalieke,etc.in this ore belt.The Pb isotopic ratios of 206 Pb/204 Pb,207 Pb/204 Pb and 208 Pb/204 Pb in the galena samples range from 17.931 to 18.176,15.609 to 15.818 and 38.197 to 38.944,with the average values of 18.017,15.684 and 38.462,respectively.Those in the chalcopyrite samples range from 17.926 to 18.144,15.598 to 15.628 and 38.171 to 38.583,with the average values of 18.020,15.606 and 38.262,respectively.The pyrite sample has the Pb isotopic ratios of 206 Pb/204 Pb,207 Pb/204 Pb and 208 Pb/204 Pb to be 17.980,15.604 and 38.145,respectively.In combination with the previous Pb isotope data for sulfides,it is found that there is only a slight variation in the Pb isotopic composition of galena,chalcopyrite,sphalerite and pyrite in the ore belt.However,there is some difference in Pb isotopic characteristics between galena and chalcopyrite,especially the Pb isotopic composition of galena shows an obvious linear correlation with some other relevant parameters(e.g.β and γ).The comprehensive analysis suggested that lead in galena(maybe including sphalerite and pyrite) was derived principally from wall rocks and underlying basement,and that in chalcopyrite only originated from the basement.The single-stage model ages of these sulfides couldn't indicate the time limit of metallogenesis(Pb,Zn,Cu,etc.),and the positive linear correlations for the Pb isotopic composition of galena are of no single-stage and two-stage Pb-Pb isochron significance.Furthermore,there are significant differences in Pb isotopic composition characteristics between the genetic type of deposits in this polymetallic ore belt and the Mississippi Valley type(MVT).In addition,the authors also pointed out that there is a phenomenon of differentiation(not paragenesis) for lead and copper elements during the process of metallogenesis in this ore belt. | SHEN Nengping ZHANG Zhengwei YOU Fuhua PENG Jiantang ZHU Xiaoqing XIAO Jiafei | 2012 | Chinese Journal Of Geochemistry2012，31，4： | 3 |
| 14 | Genomic analyses reveal distinct genetic architectures and selective pressures in Chinese donkeys显示文摘Donkey(Equus asinus)is an important livestock animal in China because of its draft and medicinal value.After a long period of natural and artificial selection,the variety and phenotype of donkeys have become abundant.We clarified the genetic and demographic characteristics of Chinese domestic donkeys and the selection pressures by analyzing 78 whole genomes from 12 breeds.According to population structure,most Chinese domestic donkeys showed a dominant ancestral type.However,the Chinese donkeys still represented a significant geographical distribution trend.In the selective sweep,gene annotation,functional enrichment,and differential expression analyses between large and small donkey groups,we identified selective signals,including NCAPG and LCORL,which are related to rapid growth and large body size.Our findings elucidate the evolutionary history and formation of different donkey breeds and provide theoretical insights into the genetic mechanism underlying breed characteristics and molecular breeding programs of donkey clades. | Jiafei Shen Jie Yu Xuelei Da Mei Li Gang Wang Ningbo Chen Hong Chen Chuzhao Lei Ruihua Dang | 2021 | Journal of Genetics and Genomics2021，48，8： | 2 |
| 15 | An effective rolling process of magnesium alloys for suppressing edge cracks: Width-limited rolling显示文摘To suppress the edge crack of the magnesium alloy sheet during the ordinary rolling process, a new rolling process named width-limited rolling was proposed in this paper. Width-limited rolling is a rolling method in which the width of the alloy sheet is limited by modifying the shape of the rollers, allowing a compressive stress field to form at the edge portion of the alloy sheet during rolling, resulting in the reduction of edge cracks. At present work, magnesium alloy sheets were separately subjected to ordinary rolling and width-limited rolling. The microstructure evolution and mechanical properties of the rolled sheets were investigated by EBSD, TEM, and XRD. The results exhibited that under the same rolling conditions, the sheet after ordinary rolling exhibited obvious edge cracks while no crack was found at the edge of the sheet after width-limited rolling. The edge crack suppressing effect was attributed to the reduction of the tensile stress along rolling direction during WLR, promoting the synchronous extension of the edge and center regions to suppress edge crack tendency. Microstructure observation showed that the compressive twins formed in the sheet after ordinary rolling usually exhibited as thin plates and cannot continue to fully develop due to the premature generation of the edge cracks. However, the compressive twins developed maturely in some of which double twins formed and various slip systems with different dislocation Burgers vectors occurred in the rolled sheet after WLR. More twin intersections and shear bands, providing more potential recrystallization nucleation sites, which are beneficial to weaken basal texture. With the cooperation of twinning and dislocation slip, the texture of the sheet after the width-limited rolling is weakened and the mechanical properties are improved. | Jing Tian Huihu Lu Wanggang Zhang Huihui Nie Quanxin Shi Jiafei Deng Wei Liang Lifei Wang | 2022 | Journal of Magnesium and Alloys2022，10，8： | 2 |
| 16 | Rheology of colloidal gas aphrons (microfoams) made from different surfactants 显示文摘 | ZHAO Jiafei PILLAI S PILON L | 2009 | Colloid Surf A2009，348，1： | 1 |
| 17 | Laparoscopic uterine fibroids resection operation of factor experimental study 显示文摘 | Wangyu Yao Jiafei | 2010 | Journal of Shenyang Medical CoUege2010，12，5： | 1 |
| 18 | The status of natural gas hydrate research in China: A review显示文摘 | Song Yongchen Yang Lei Zhao Jiafei Liu Weiguo Yang Mingjun Li Yanghui | 2014 | Renewable and Sustainable Energy Reviews2014，31，： | 1 |
| 19 | Magnetic flux vertial motion modulation for1~' noise reduction of magnetic tunnel junctions 显示文摘 | Mengchun P Jiafei H | 2012 | Sensors and Actuators A : Physical2012，179，： | 1 |
| 20 | The metallogenic environment of the Dounan manganese deposit,Southeast Yunnan, China: evidence from geochemistry and Mössbauer spectroscopic显示文摘The Dounan manganese deposit is a typical large-scale marine sedimentary manganese deposit of the Middle Triassic in China. The metallogenic environment and change process directly dictate the migration, enrichment, and precipitation of Mn. To better understand its metallogenetic environment, a detailed study was undertaken involving field observation, mineralogical and geochemical and M?ssbauer spectroscopic analyses. The major findings are as follows:(1) Lithofacies paleogeography, sedimentary structural characteristics, and geochemical indexes indicate that the deposits were formed in an epicontinental marine sedimentary basin environment of normal salinity;(2) there were three ore phases including Mn oxides, Mn carbonates, and mixed Mn ores. The ore minerals found were braunite, manganite, Ca-rhodochrosite, manganocalcite, and kutnahorite. Petrographic and mineralogical information indicates that the metallogenic environment was a weakly alkaline and weakly oxidized to weakly reduced environment, and the mineralization occurred near the redox interface;(3) the V/(V + Ni)ratios, δCe and Fe^(2+)/Fe^(3+) found in profiles of Baigu and Gake ore sections show that the redox conditions of the ore-forming environment were continuously changing; and(4) three Fe species, α-Fe_2O_3, para-Fe^(3+), and para-Fe^(2+),were found in hematite and clay mineral samples using M?ssbauer spectrum analysis. The presence and distribution of these Fe species indicate that the deposit was formed in a typical sedimentary environment during the mineralization process. In summary, our study showed that redox was a key factor controlling the mineralization of the Dounan manganese deposit. Our results have led us to the conclusion that transgression and regression caused fluctuations in sea level, which in turn caused the change of the redox environment. M?ssbauer spectroscopy is an effective tool for studying the redox conditions of the paleoenvironment in which sedimentary manganese deposits were formed. | Jianbing Duan Yazhou Fu Zhengwei Zhang Xiangxian Ma Jiafei Xiao | 2019 | Acta Geochimica2019，38，1： | 1 |
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