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16篇 您的检索式:作者名="Shunli Yu"
    题名 作者 年代 出处 被引量
1Interaction between Downslope and Alongslope Processes on the Margins of Daihai Lake,North China:Implication for Deltaic Sedimentation Models of Lacustrine Rift Basin显示文摘代海·莱克,现代湖的裂缝盆,在内部蒙古定位了,诺思中国,为在活跃裂缝设置理解三角形的 depositional 进程用作重要现代类似物。代海·莱克的边缘上的二个三角洲(Yuanzigou 三角洲和 Bulianghe 三角洲) 被调查比较并且形成对照用天线相片,领域 trenching 和沉积采样叠模式。从代海·莱克的边缘收集的浅核心和沟数据显示自从形成的代海·莱克,许多 depositional 进程是活跃的。采用 chronostratigraphic 关联技术的二个 3-D 沉积模型被产生。chronostratigraphic 沉积模型预言并且代表体系结构和沉积的沙身体连续性。宽广 sheeted 飘移和隧道侵蚀的地层学的巧合建议 a coupling 在之间下坡并且 alongslope 过程。支流嘴酒吧由于下坡的流动的优势在更陡峭的斜坡上的三角洲的前面是流行的。相反,沿着斜坡水流在轻轻的 depositional 斜坡上与 sheeted sandbodies 赞成远侧的酒吧存款的发展。这研究提供卓见进与加亮下坡的流动和 alongslope 水流之间的关键差别联系的复杂沉积外形的建筑学。在这些三角洲以内的沙的分发具有特别兴趣,用在理解在湖的裂缝盆形成的烃水库的建筑学的应用。YU Xinghe LI Shunli CHEN Bintao TAN Chengpeng XIE Jing HU Xiaonong 2012Acta Geologica Sinica(English Edition)2012,86,4:12
2Water yield reduction due to forestation in arid mountainous regions, northwest China显示文摘Forestation has been encouraged worldwide due to increasing demand for forest products, and for its ecological benefits such as soil erosion control and sediment reduction. However, forestation reduces runoff, thus potentially aggravating water shortages in arid regions. In order to quantitatively estimate the possible water yield reductions caused by forestation in an arid region, a small watershed (the Pailugou watershed) in the Qilian Mountains of northwest China was chosen as a study area. The responses of hydrological dynamics to different forestation scenarios in the study area were simulated using the TOPOG model. The results showed that forestation could lead to a complete loss of runoff at the site scale. At the watershed scale, a 10% increase in forest coverage led to a runoff reduction of 25.6 mm, equivalent to 13% of the runoffin the un-forested watershed. However, due to climatological and topographical constraints, the potential forest distribution occupied only 46.3% of the watershed area, and runoff reduction was estimated to reach a maximum of 60% when the forest cover ratio increased from 0.41% to 46.1%. Actual forest coverage is 36% in the study area, thus the water yield will be reduced with any further increase in forest area. Our study suggested that a trade-off between the numerous benefits of forest coverage increase and its negative impact on water yield should be carefully addressed in arid regions with inherently severe water-shortage.Pengtao YU Yanhui WANG Xudong WU Xiaohong DONG Wei XIONG Gaowa BU Shunli WANG Jinye WANG Xiande LIU Lihong XU 2010International Journal of Sediment Research2010,25,4:7
3The response of deltaic systems to climatic and hydrological changes in Daihai Lake rift basin,Inner Mongolia,northern China显示文摘Delta systems are ubiquitous around lacustrine rift basins. Its peripheral ge-ometry, progradation structures and sedimentary successions were controlled by both tec-tonic settings and climatic changes. Peripheral geometry of a delta was strongly influenced by depositional gradients which formed the fan-shape delta on the steep slopes and developed the lobe-shape delta on the gentle slopes. Due to the discharge feed rivers can change rapidly driven by climatic variations, and the nearshore area of deltas display considerable facies variability. The rise of annual rainfall, which suggests the rivers feeding deltas are continuous, and result in distributary mouth bars that are prevalent in the front of deltas since the down-slope flows are greater than the along-slope currents. On the contrary, when the annual rainfall decreases and evaporation increases, the rivers only can feed deltas ephemerally. If the along-slope currents were in a dominant position, the distal bars were deposited. Progra-dation structure and sedimentary successions of deltas were controlled by the gradients of slopes. On gentle depositional slopes, shingle foreset beds predominate with fine sediments and small-scale sedimentary structures or vice versa.Yu Xinghe Li Shunli Tan Chengpeng Xie Jing Chen Bintao Yang Fan 2013Journal of Palaeogeography2013,2,1:6
4Invasion Possibility and Potential Effects of Rhus typhina on Beijing Municipality显示文摘Rhus typhina,an alien species introduced from North America,was identified as a main afforestation species in Beijing municipality. However,its invasiveness is still at odds. To clarify this problem,we applied the North American Screening System and the Australian Screening System to preliminarily predict its invasion possibility. Both screening systems gave the same recommendation to 'reject'. The geographical distribution was surveyed,with the population features of R. typhina against the native plant communities being assessed. With anthropogenic assistance,R. typhina has been scattered on almost all habitats from downtown to mountains,including roadsides,farmlands and protected areas. As a clonal shrub,R. typhina possessed a high spreading rate,varying from 6.3m/3years at sterile habitats to 6.7m/3years at fertile ones. Significantly lower species richness,individual density and diversity were observed in the R. typhina community than those of the native Vitex negundo Linn.var. heterophylla (Franch.) Rehd. community at both sterile and fertile habitats. Continual wide plantation of R. typhina may further foster its population expansion,which helps the species to overcome spatial isolation. The fact that each root fragment can develop into a new individual makes R. typhina very difficult to be eradicated once established. From a biological point of view,we believe that R. typhina is a plant invader in Beijing. We therefore suggest the government should remove the name of R. typhina from the main tree species list in afforesting Beijing.Guangmei Wang Gaoming Jiang Shunli Yu Yinghao Li Hui Liu 2008Journal of Integrative Plant Biology2008,50,5:5
5Sedimentary Patterns and Stratigraphic Trap Models of Deeply Buried Intervals in the Baxian Depression, North China显示文摘The Baxian depression is a typical half-graben located in the Jizhong sub-basin, north China. Commercial petroleum traps have been discovered in the Jizhong sub-basin. However, the 3^(rd) and 4^(th) members of the Shahejie Formation in this sub-basin have been poorly explored. These two members, belonging to the Lower Paleogene age, are buried deeply in the depression. Favorable petroleum reservoir conditions exist in such deep intervals of the half-graben due to the presence of different types and extent of deltas and turbidity fans in various areas. In fact, three types of turbidite fans are developed in the sag below the transitional belt on the eastern gentle slope. This work summarized three stratigraphic trap belts, i.e., the steep slope, gentle slope, and sag. On the steep slope, structuralstratigraphic traps with small-scale delta fronts and turbidite sandbodies are well developed. On the gentle slope, hydrocarbons generally accumulate in the large-scale delta front, onlapping beds and those sandbodies adjacent to unconformities. In the sag, petroleum trap models are typically characterized by pinched-out turbidite sandbodies. Stratigraphic traps were easily formed in turbidite fans below the eastern transitional belt. The petroleum traps that have already been discovered or predicted in the study area indicate that stratigraphic traps have favorable petroleum exploration potential in deeply buried areas(depth >5000 m) in a half-graben basin or depression.LI Shengli YU Xinghe ZHANG Feng LIANG Xingru LI Shunli HUANG Jie CAO Nanzhu 2017Acta Geologica Sinica(English Edition)2017,91,6:3
6Evolution model of a modern delta fed by a seasonal river in Daihai Lake,North China:determined from groundpenetrating radar and trenches显示文摘While deltas fed by seasonal rivers are common in modem sedimentary environments,their characteristics remain unclear as compared to those fed by perennial rivers.This study identifies a small delta discharged by a seasonal stream flowing into Daihai Lake,in northern China,which is driven by ephemeral and high-energy flood events.Detailed 3D facies architecture was analyzed using ground-penetrating radar (GPR) and sedimentary logs from outcrop and trenches.Four types of radar surfaces,including truncations of underlying inclined strata,weak reflections,and depositional surface of downlap and onlap,were identified.Six radar facies (highangle obliquetangential,low-angle subparallel,gently plane parallel,plane-parallel,chaotic,and continuous strong reflection) were identified based on distinctive reflections,including amplitude,continuity,dip,and termination patterns.Five depositional units (Unit A to E) were documented from proximal to distal delta.Seasonal discharge signatures include significant grain-size decrease over short distance,abundant Froude supercritical flow sedimentary structures,poorly developed barforms,and small-scale scour and fill structures.Records of lake-level and sediment budget were evaluated over the past 60 years.In highstand stage (1960- 1980),amalgamated channel (Units A and B),and delta front (Unit C) were deposited.In slope stage (1980-1996),the lower deposits (Units A,B,C) were eroded by Unit D with a distinct truncation surface.In lowstand stage,most eroded sediments bypassed the incised channel and accumulated in the distal part,in which a new depositional unit was formed (Unit E).The model demonstrates that deltas fed by seasonal rivers tend to accumulate large amounts of sediments carried by high magnitude floods within short periods.Beibei LIU Chengpeng TAN Xinghe YU Xin SHAN Shunli LI 2019Frontiers of Earth Science2019,13,2:1
7Submarine landslides, relationship with BSRs in the Dongsha area of South China Sea显示文摘Gas hydrate samples were first obtained in the Dongsha area,South China Sea(GMGS2)in 2013.High-resolution 3D seismic data in the area show various small 1andslide bodies developedas huge mass transport deposits.These bodies are divided into seven types on the basis of theirshapes,intermal structures and geneses(slide,collapse and deformation above BSRs,as well asthe slump wedge,lens,block and sheet below BSRs).Based on this classification,detailed studieswere conducted,including measurements of the slump body sizes and slope gradients of landslides,depiction of their three-dimensional characteristics,and research on the landslide distribution.Todetermine the genetic differences of these seven types,this study analyses the possibility of verticalflow-pattern-transformation and mechanisms of submarine landsltide formation.Results show that thedominant factor influencing the submarine landslides in the Dongsha area is the free gas emitted fromgas hydrate decomposition,with possible fransformation between flow patterns.Finally,there are twokinds of relationships between submarine landslides and BSRs since the free gas either influences thesubmarine landslide bodies below or above BSRs,resulting in two types of submarine landslide bodyassociations:Type A is characterized by submarine slide above BSRs and slump lens below BSRs,whereas Type B shows deformation above BSRs and slump blocks below BSRs.Type Ais favourablefor gas exploration because it indicates less decomposition and better sealing of gas hydrate layers.Li Wan Xinghe Yu Tyson Steve Shunli Li Zenggui Kuang Zhibin Sha Jinqiang Liang Yulin He 2016Petroleum Research2016,1,1:1
8Identification and Ultrastructure Observation of Rat Bone Marrow Derived Dendritic Cells in Vitro显示文摘Yu Su Jingling Wang Fuquan Chen Li Qiao Li Shi Shunli Liu Wen juan Mi Jianhua Qiu 2006Journal of US-China Medical Science2006,3,3:0
9The stability of deformation twins in aluminum enhanced by alloying elements显示文摘Introducing and stabilizing twins in aluminum is a challenge for metals research due to their high formation energy.Employing first-principles calculations,we investigated the twin boundary segregation of alloying elements and their impact on the twin boundary energy in aluminum.Alloying elements with small solubilities but strong interaction with twin boundary would significantly reduce twin boundary energies in aluminum at low temperatures.With increasing temperature,their segregation near twin boundary weakens,leading to their influence on twin boundary energies reduced.Some elements with large solubilities may greatly reduce the twin energies not only at low temperatures but also at high temperatures.Based on careful analysis of charge density and atomic radius,it has been found that chemical difference has little influence on twin boundary energy whereas the atomic size effect plays a leading role in causing the change of twin boundary energy.Linghong Liu Jianghua Chen Touwen Fan Shunli Shang Qinqin Shao Dingwang Yuan Yu Dai 2019Journal of Materials Science & Technology2019,35,11:0
10Insights into plastic deformation mechanisms of austenitic steels by coupling generalized stacking fault energy and semi-discrete variational Peierls-Nabarro model显示文摘The generalized stacking fault energy(GSFE)is a key parameter to determine the plastic deformation mechanisms of austenitic steels.However,the underlying physics why the GSFE can affect the plastic deformation behaviors remains unclear.In this paper,the plastic deformation mechanisms of austenitic steels with different carbon(C)additions were investigated by coupling the GSFE with the semi-discrete variational Peierls-Nabarro(P-N)model.The internal mechanisms behind the P-N stress and plastic deformation were explained at atomic scale.It is found that the positions and contents of C atoms affect the GSFE of austenite,and thus regulate plastic deformation behaviors of austenitic steels by influencing dislocation core structure.As exemplified that with 4 at.%C in austenite,the intrinsic stacking fault energy increases from433 to264 mJ/m^(2),and the stacking fault width increases to 6.62b from 4.72b of FCC-Fe with b being the Burgers vector.This corresponds to the plastic defor-mation mechanism dominated by theεmartensitic transformation with the lattice changing from FCC to HCP.With increasing C contents to 8 at.%,the intrinsic stacking fault energy of austenite increases to9.01 mJ/m2,while the stacking fault width decreases to 6.03b.The plastic deformation tends to proceed via the mechanical twinning mode.The present investigation establishes a solid foundation for clarifying the plastic deformation mechanisms of austenitic steels from the perspective of the dislocation core structure.Yu Liu Jinglian Du Shunli Shang Ang Zhang Shoumei Xiong Zi-Kui Liu Feng Liu 2023Progress in Natural Science:Materials International2023,33,1:0
11Performance evaluation of the simpli¯ed spherical harmonics approximation for cone-beam X-ray luminescence computed tomography imaging显示文摘As an emerging molecular imaging modality,cone-beam X-ray luminescence computed tomog-raphy(CB-XLCT)uses X-ray-excitable probes to produce near-infrared(NIR)luminescence and then reconst ructs three-dimensional(3D)distribution of the probes from surface measurements.A proper photon-transportation model is critical to accuracy of XLCT.Here,we presented a systematic comparison between the common-used Monte Carlo model and simplified spherical harmonics(SPN).The performance of the two methods was evaluated over several main spec-trums using a known XLCT material.We designed both a global measurement based on the cosine similarity and a locally-averaged relative error,to quantitatively assess these methods.The results show that the SP_(3) could reach a good balance between the modeling accuracy and computational efficiency for all of the tested emission spectrums.Besides,the SP_(1)(which is equivalent to the difusion equation(DE))can be a reasonable alternative model for emission wavelength over 692nm.In vivo experiment further demonstrates the reconstruction perfor-mance of the SP:and DE.This study would provide a valuable guidance for modeling the photon-transportation in CB-XLCT.Haibo Zhang Guohua Geng Yanrong Chen Fengjun Zhao Yuqing Hou Huangjian Yi Shunli Zhang Jingjing Yu Xiaowei He 2017Journal of Innovative Optical Health Sciences2017,,3:0
12Preparation and properties of nanosize MnZn ferrite from δ-FeOOH显示文摘Ferrous ion was transformed into feroxyhyte (δ-FeOOH) by oxidation. Then, manganese sulfate and zinc sulfate in some ratio were added to the feroxyhyte solution. The co-precipitation was boiling reflux conditions sometime under constant stirring. The nanosize MnZn ferrite powder was formed. The mechanism of preparation of the nanosize MnZn ferrite was discussed, and the formation of feroxyhyte which was playing a key role during the process was mentioned. The properties of powder was tested by means of X-ray diffraction, transmission electron microscopy and vibrating sample magnetometer. The results show that the samples of spherical particles about 20 nm, which have characteristics of ferrimagnetism, has larger saturation magnetization, but the remanent magnetization and coercivity are comparatively smaller. The spinel MnZn ferrite nanosize powder was successfully prepared from δ-FeOOH at low temperature, with low-carbon steel and peroxide as main material.HAO Shunli WANG Xin WEI Yu Wang Yongming Liu Chunjing 2006Rare Metals2006,25,z1:0
13Classification of mass-transport complexes and distribution of gashydrate-bearing sediments in the northeastern continental slope of the South China Sea显示文摘The drilling areas in Shenhu and Dongsha,South China Sea,studied from 2007 to 2015,reveal great heterogeneity in the spatial distribution of the gas hydrate reservoir.Various types of mass-transport complexes(MTCs)were developed in the study areas,which served as ideal reservoirs.To conduct exploration in these areas,it is necessary to study the different types of MTCs and the corresponding gashydrate accumulations.By integrating seismic reflection and log coring data,we classified three types of MTCs according to their stress distribution:the tension,extrusion,and shear types,and their corresponding gashydrate accumulation patterns.The results show that the accumulation of the gas-hydrate varies with the type of MTC and stress distribution depending on the MTC’s position(e.g.,in the headwall,translational,or toe areas).Owing to this variance of the MTC’s position,the corresponding kinemics situation in the MTCs also varies.Accordingly,we determined the corresponding location in which the gashydrate develops for various types of MTCs.Based on the bottom simulating reflectors(BSRs)and the hydrate core and image logging data,the gashydrate reservoir shows an obvious heterogeneity in various types of MTCs.The gashydrate in the tension-type MTCs are mostly borne in the toe and the headwall parts.In extrusion-type MTCs,the translational and toe parts constitute an ideal hydrate reservoir.In shear-type MTCs,the headwall and toe parts’coarse-grained sediments show an obviously hydrate response.After comparing the gashydrate saturation and MTCs morphology statics data,we were able to quantitatively prove that the main factors determining gashydrate accumulation in the different types of MTCs are the fault displacement,sedimentary rate,and flow erosion rate.Chao FU Xinghe YU Xue FAN Yulin HE Jinqiang LIANG Shunli LI 2020Frontiers of Earth Science2020,14,1:0
14SLC7A11:a new regulator in diabetic wound healing显示文摘In a recent paper published in Nature,Maschalidi and colleagues described the inhibition of SLC7A11 function in dendritic cells(DCs)as a crucial regulator for acceleration of wound healing in diabetes.The membrane transporter SLC7A11’s identification as a molecular brake on efferocytosis is important to better understand the role of DCs in regulating tissue repair,especially for diabetic wound healing.Shunli Rui Yu Ma Wuquan Deng 2022Signal Transduction and Targeted Therapy2022,7,10:0
15Ground-penetrating radar study of beach-ridge deposits in Huangqihai Lake, North China: the imprint of washover processes显示文摘在湖的盆决定沙滩山脉的起源能经常是有问题的。为胡昂基海·莱克的北方岸上的沙滩山脉的形成负责的沉积过程被使用渗透雷达(GPR ) 的地面调查。400 MHz GPR 天线被用来完成 0.04-0.08 m 的高垂直的分辨率。雷达地层学然后用地震地层学的原则被决定。雷达外形(RF ) 被分析思考,以及思考结束模式的内部配置和连续性决定。识别 RF 掉进三个组(倾向,水平、不规则) 。使倾向的组由显示使倾向了的 RF 组成思考。水平组由 RF 组成展出主要水平的思考。在不规则的组,思考典型地是弱的。有思考与的 RF 轻轻地,向陆地,在岸正常侧面的剧降作为 washover 表存款被解释。有陡峭地向陆地蘸、使 washover 脑叶成鳞状的思考的 RF 作为被解释。当冲洗没能进入水的重要身体,沉积完全在相对弄平的地形学上发生时, Washover 表发展。当冲洗进入地形学向陆地陡峭地在蘸的一个区域时, Washover 脑叶开发发生,并且沉积发生在 washover 表或以前的 washover 脑叶的表面上。当从垂直地并且旁边地叠的 washover 表和 washover 脑叶完全被形成,沙滩山脉存款被解释。他们被波浪主导的过程和沿岸的水流补充的第二等的冲洗过程形成。Xin SHAN Xinghe YU Peter D. CLIFT Chengpeng TAN Shunli LI Zhixing WANG Dongxu SU 2016Frontiers of Earth Science2016,10,1:0
16Fabrication of Mesoporous SiO_(2)@CaSiO_(3) Hollow Spheres as Carriers for pH-sensitive Drug Delivery显示文摘Hollow mesoporous silica(HM-SiO_(2))was prepared by the improved stober method.On this basis,HM-SiO_(2) was dispersed in an alkaline solution for surface etching.Meanwhile,calcium source was introduced to combine with SiO_(3)^(2−) on the surface to form a CaSiO_(3) shell layer and an unprecedent SiO_(2)@CaSiO_(3) sphere with a hollow double-shell structure was obtained.The as-synthesized SiO_(2)@CaSiO_(3) was characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),N_(2)-BET,IR and UV-Vis techniques,and its sustained release capacity of doxorubicin(DOX)loading was investigated.The drug loading capacity can be achieved to 0.692 mg DOX/mg SiO_(2)@CaSiO_(3),exhibiting pH-responsivity under low pH conditions.YUAN Mingwei SHI Shunli LUO Yanping YU Ying WANG Shuhua CHEN Chao 2022Chemical Research in Chinese Universities2022,38,4:0
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