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20篇 您的检索式:作者名="Wang Wanyin"
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1A new edge recognition technology based on the normalized vertical derivative of the total horizontal derivative for potential field data显示文摘边察觉和改进技术通常在用潜在的域数据认出地质的身体的边被使用。我们在场一种新边识别技术基于有边察觉和改进技术的功能的全部的水平衍生物的规范的垂直衍生物。首先,我们计算潜在地的数据的全部的水平衍生物(THDR ) 然后计算 n 顺序 THDR 的垂直衍生物(VDRn ) 。为 n 顺序垂直衍生物,全部的水平衍生物(PTHDR ) 的山峰价值用比 0 大的阀值价值被获得。这 PTHDR 能被用于边察觉。第二, PTHDR 价值被全部的水平衍生物划分并且由最大的价值使正常化。最后,我们使用了数字模型的不同类型验证新边识别技术的有效性和可靠性。Wang Wanyin Pan Yu Qiu Zhiyun 2009Applied Geophysics2009,6,3:79
2Pattern analysis of a linear dune field on the northern margin of Qarhan Salt Lake,northwestern China显示文摘In terms of formation mechanisms of linear dunes,there are open arguments for their widespread distribution and multi-morphological diversities.In order to clarify the formation mechanism of linear dunes of Qarhan Salt Lake,we used pattern analysis method to analyze the statistical characteristics and spatial variation of their pattern parameters.Except at the west-northwest margin,the pattern parameters showed regular spatial variation from the up-middle part towards the downwind end of the dune field.Based on the cumulative probability plots for inter-crest spacing and crest length,we divided the linear dunes into three groups,which corresponding to the three evolution stages of these dunes.The first group comprises erosional relics,with shorter crests,smaller inter-crest spacing and more random dune orientation.The second group comprises dunes whose sand supply is just sufficient to maintain stability and these dunes are approaching the net erosion stage.The crest length and inter-crest spacing of these dunes are much larger than those of the first group,and dune orientation is closer to the resultant drift direction (RDD) .The last group comprises linear dunes that are still undergoing vertical accretion and longitudinal elongation,which follows the RDD of the modern wind regime.The presence of regular spatial variation of pattern parameters and a similar geometry with the vegetated linear dunes suggest that deposition and erosion coexist in the development and evolution of linear dunes of Qarhan Salt Lake,i.e.deposition predominates at the downwind end of linear dunes in the vertical accretion and longitudinal elongation stage,whereas erosion mainly occurs at the upwind end of linear dunes in the degradation stage.Therefore,the formation mechanism of linear dunes in Qarhan Salt Lake can be reasonably explained by the combination of depositional and erosional theories.LI Jiyan DONG Zhibao QIAN Guangqiang ZHANG Zhengcai LUO Wanyin LU Junfeng WANG Meng 2016Journal of Arid Land2016,8,5:6
3Evaluating the optimal porosity of fences for reducing wind erosion显示文摘Porosity is the most important parameter determining the shelter efficiency of fences.Wind measurements were made around fence models with different porosities in a wind tunnel.The optimal fence porosity is evaluated by means of Gandemer's method that com-bines the effects of wind reduction and turbulence fields on the shelter efficiency for abating wind erosion.Defining the optimal po-rosity must take into account of its own purposes,required shelter degree and area to be sheltered.Turbulence has profound impacts on the shelter efficiency of high degree.Two concepts:absolute optimal porosity and practical optimal porosity concerning optimal porosity are proposed.Choosing the practical optimal porosity means reducing cost without significant expense of shelter efficiency.According to the evaluation in present study,the absolute optimal porosity for providing high degree of shelter to abate wind erosion is 0.20 while the practical optimal porosity is around 0.40.If a less shelter degree but over wider area is required,the absolute optimal porosity ranges from 0.05 to 0.10 and the practical optimal porosity is 0.10.For any degree of shelter for abating wind erosion effec-tively,the fence porosity must be less than or equal 0.40.ZhiBao Dong WanYin Luo GuangQiang Qian HongTao Wang 2011Research in Cold and Arid Regions2011,3,1:5
4Threshold wind velocity in the lee of two-dimensional transverse dunes显示文摘Secondary flow plays an important role in the development of dunes. To investigate this phenomenon, we simulated models of transverse dunes with different stoss slopes in a wind tunnel. We measured the threshold wind velocity at different locations in the lee of the dunes, and observed the corresponding particle movement characteristics under threshold conditions to assess the sedi-mentological significance of secondary airflow. Threshold wind velocity changed with both horizontal distance and stoss slope. Its variation with horizontal distance is characterized by a region in which a rapid reduction occurs, a region with a minimum value, and a region with high value. We confirmed the presence of reversal cells, irrespective of the stoss slope. Neither the variation in threshold wind velocity nor the variation in reattachment distance as a function of stoss slope followed a monotonic function. The 15° stoss slope had the greatest threshold wind velocity and reattachment distance.ZhiBao Dong HongTao Wang GuangQiang Qian WanYin Luo 2010Research in Cold and Arid Regions2010,2,1:1
5A Wind Tunnel Investigation of the Shear Stress with A Blowing Sand Cloud显示文摘In a blowing sand system,the wind provides the driving forces for the particle movement while the moving particles exert the opposite forces to the wind by extracting its momentum.The wind-sand interaction that can be characterized by shear stress and force exerted on the wind by moving particles results in the modification of wind profiles.Detailed wind pro-files re-adapted to blown sand movement are measured in a wind tunnel for different grain size populations and at differ-ent free-stream wind velocities.The shear stress with a blowing sand cloud and force exerted on the wind by moving par-ticles are calculated from the measured wind velocity profiles.The results suggest that the wind profiles with presence of blowing sand cloud assume convex-upward curves on the u(z)-ln(z) plot compared with the straight lines characterizing the velocity profiles of clean wind,and they can be better fitted by power function than log-linear function.The exponent of the power function ranging from 0.1 to 0.17 tends to increase with an increase in wind velocity but decrease with an increase in particle size.The force per unit volume exerted on the wind by blown sand drift that is calculated based on the empirical power functions for the wind velocity profiles is found to decrease with height.The particle-induced force makes the total shear stress with blowing sand cloud partitioned into air-borne stress that results from the wind velocity gradient and grain-borne stress that results from the upward or downward movement of particles.The air-borne stress in-creases with an increase in height,while the grain-borne stress decreases with an increase in height.The air-borne shear stress at the top of sand cloud layer increases with both wind velocity and grain size,implying that it increases with sand transport rate for a given grain size.The shear stress with a blowing sand cloud is also closely related to the sand transport rate.Both the total shear stress and grain-borne stress on the grain top is directly proportional to the square root of sand transport rate.So,the profound effect of the moving particles on the airflow must be considered in modeling the blown sand movement.With the presence of sand movement,the boundary layer with a blowing sand cloud is no longer a con-stant air shear layer.Zhibao Dong*,Hongtao Wang,Guangqiang Qian,Wanyin Luo Key Laboratory of Desert and Desertification,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou,China 2008Research in Cold and Arid Regions2008,,1:1
6Re-detectable positive SARS-CoV-2 RNA tests in patients who recovered from COVID-19 with intestinal infection显示文摘Dear Editor,Severe acute respiratory syndrome coronavirus 2(SARSCoV-2),a novel coronavirus that causes Coronavirus Disease 2019(COVID-19)(Yang and Wang,2020),has spread to more than 200 countries and infected more than 9,000,000 people as of Jun 2020.Tens of thousands of patients with COVID-19 have recovered and been discharged from hospital.However,there are reports of recovered patients who subsequently tested positive for SARSCoV-2 after discharge(re-detectable positive,RP)(An et al.,2020;Lan et al.,2020),and this has led to increasing focus on the mechanism(s)underlying RP.Wanyin Tao Xiaofang Wang Guorong Zhang Meng Guo Huan Ma Dan Zhao Yong Sun Jun He Lianxin Liu Kaiguang Zhang Yucai Wang Jianping Weng Xiaoling Ma Tengchuan Jin Shu Zhu 2021Protein & Cell2021,12,3:1
7A wind tunnel simulation of the mean velocity fields behind upright porous fences显示文摘Zhibao Dong Wanyin Luo Guangqiang Qian Hongtao Wang 2007Agricultural and Forest Meteorology2007,,1:1
8Hsp70 may protect cardiomyocytes from stress-induced injury by inhibiting Fas mediated apoptosis 显示文摘Yun Zhao Wanyin Wang Lingjia Qian 2007Cell Stress & Chaperones2007,12,1:1
9Psychological stress induced hippocampus zinc dyshomeostasis and depression-like behavior in rats显示文摘Xiao Dou Xue Tian Yuanyuan Zheng Junlong Huang Zhilei Shen Hongxia Li Xiaoli Wang Fengfeng Mo Wanyin Wang Shi Wang Hui Shen 2014Behavioural Brain Research2014,,:1
10Relationship between the Extent of Igneous Rocks and Deep Structures as Determined by Gravitational and Magnetic Data in the South China Sea显示文摘The distribution of oil and gas resources in the South China Sea and adjacent areas is closely related to the structural pattern that helped to define the controlling effect of deep processes on oil-bearing basins.Igneous rocks can record important information from deep processes.Deep structures such as faults,basin uplift and depression,Cenozoic basement and magnetic basement are all the results of energy exchange within the earth.The study of the relationship between igneous rocks and deep structures is of great significance for the study of the South China Sea.By using the minimum curvature potential field separation technique and the correlation analysis technique of gravitational and magnetic anomalies,the fusion of gravitational and magnetic data reflecting igneous rocks can be obtained,through which the igneous rocks with high susceptibility/high density or high susceptibility/low density can be identified.In this study area,igneous rocks do not develop in the Yinggehai basin,Qiongdongnan basin,Zengmu basin and Brunei-Sabah basin whilst igneous rocks with high susceptibility/high density or high susceptibility/low density are widely-developed in other basins.In undeveloped igneous areas,faults are also undeveloped the Cenozoic thickness is greater,the magnetic basement depth is greater and the Cenozoic thickness is highly positively correlated with the magnetic basement depth.In igneously developed regions,the distribution pattern of the Qiongtai block is mainly controlled by primary faults,while the distribution of the Zhongxisha block,Xunta block and Yongshu-Taiping block is mainly controlled by secondary faults,the Cenozoic thickness having a low correlation with the depth of the magnetic basement.YANG Min WANG Wanyin ZHANG Gongcheng MA Jie 2021Acta Geologica Sinica(English Edition)2021,95,1:1
11Threshold velocity for wind erosion: the effects of porous fences显示文摘Zhibao Dong Guangqiang Qian Wanyin Luo Hongtao Wang 2006Environmental Geology2006,,3:1
12Pseudo-feathery dunes in the Kumtagh Desert显示文摘Zhibao Dong Jianjun Qu Xunming Wang Guangqiang Qian Wanyin Luo Zhenhai Wei 2008Geomorphology2008,,3:1
13Late Cenozoic tectonic deformation in DongSha Islands and adjacent sea area显示文摘WU SHIGUO LIU ZHAN WANG WANYIN 2003Chin J Oceanol Limn2003,21,4:1
14SnO/SnO_(2) heterojunction:an alternative candidate for sensing NO_(2) with fast response at room temperature显示文摘The SnO_(2)-based family is a traditional but important gas-sensitive material.However,the requirement for high working temperature limits its practical application.Much work has been done to explore ways to improve its gas-sensing performance at room temperature(RT).For this report,SnO_(2),SnO,and SnO/SnO_(2) heterojunction was successfully synthesized by a facile hydrothermal combined with subsequent calcination.Pure SnO_(2) requires a high operating temperature(145℃),while SnO/SnO_(2) heterojunction exhibits an excellent performance for sensing NO_(2) at RT.Moreover,SnO/SnO_(2) exhibits a fast response,of 32 s,to 50 ppm NO_(2) at RT(27℃),which is much faster than that of SnO(139 s).The superior sensing properties of SnO/SnO_(2) heterojunction are attributed to the unique hierarchical structures,large number of adsorption sites,and enhanced electron transport.Our results show that SnO/SnO_(2) heterojunction can be used as a promising high-performance NO_(2) sensitive material at RT.Pengtao WANG Wanyin GE Xiaohua JIA Jingtao HUANG Xinmeng ZHANG Jing LU 2022Frontiers of Materials Science2022,16,3:0
15SYNTHESIS AND CHARACTERIZATION OF DI(2,4,6-TRIBROMOPHENOXY)TRIPHENYL-ANTIMONY显示文摘The synthetic method and characterization of di(2,4,6-tribromophenoxy)triphenyl antinony are reporledin this paper.This compound is prepared by reacting dihalotripheny-antimony with tribromophenol under defi-nite conditions and its yield is 70-80%.Relow 250℃,the product has good lhernal stability.It makes alavorable flame resisting effect on polyethylene.while the addition is ouly l0 Phr without using animeny1rioxide,the oxygen index of the polymer increases from 18.51o 26.5,and there are no adverse effects on themechanical properties of polyelhylene.Shu Wanyin Liu Daliang Huang Kelong Wang Kaiyi Li Yuangao 1992Transactions of Nonferrous Metals Society of China1992,2,2:0
16FedTC:A Personalized Federated LearningMethod with Two Classifiers显示文摘Centralized training of deep learning models poses privacy risks that hinder their deployment.Federated learning(FL)has emerged as a solution to address these risks,allowing multiple clients to train deep learning models collaborativelywithout sharing rawdata.However,FL is vulnerable to the impact of heterogeneous distributed data,which weakens convergence stability and suboptimal performance of the trained model on local data.This is due to the discarding of the old local model at each round of training,which results in the loss of personalized information in the model critical for maintaining model accuracy and ensuring robustness.In this paper,we propose FedTC,a personalized federated learning method with two classifiers that can retain personalized information in the local model and improve the model’s performance on local data.FedTC divides the model into two parts,namely,the extractor and the classifier,where the classifier is the last layer of the model,and the extractor consists of other layers.The classifier in the local model is always retained to ensure that the personalized information is not lost.After receiving the global model,the local extractor is overwritten by the globalmodel’s extractor,and the classifier of the globalmodel serves as anadditional classifier of the localmodel toguide local training.The FedTCintroduces a two-classifier training strategy to coordinate the two classifiers for local model updates.Experimental results on Cifar10 and Cifar100 datasets demonstrate that FedTC performs better on heterogeneous data than current studies,such as FedAvg,FedPer,and local training,achieving a maximum improvement of 27.95%in model classification test accuracy compared to FedAvg.Yang Liu Jiabo Wang Qinbo Liu Mehdi Gheisari Wanyin Xu Zoe L.Jiang Jiajia Zhang 2023Computers, Materials & Continua2023,76,9:0
17Influence of the Moho surface distribution on the oil and gas basins in China seas and adjacent areas显示文摘Owing to the strategic significance of national oil and gas resources,their exploration and production must be prioritized in China.Oil and gas resources are closely related to deep crustal structures,and Moho characteristics influence oil and gas distribution.Therefore,it is important to study the relationship between the variation of the Moho surface depth undulation and hydrocarbon basins for the future prediction of their locations.The Moho depth in the study area can be inverted using the Moho depth control information,the Moho gravity anomaly,and the variable density distribution calculated by the infinite plate.Based on these results,the influences of Moho characteristics on petroleum basins were studied.We found that the Moho surface depth undulation deviation and crustal thickness undulation deviation in the hydrocarbon-rich basins are large,and the horizontal gradient deviation of the Moho surface shows a positive linear relationship with oil and gas resources in the basin.The oil-bearing mechanism of the Moho basin is further discussed herein.The Moho uplift area and the slope zone correspond to the distribution of oil and gas fields.The tensile stress produced by the Moho uplift can form tensile fractures or cause tensile fractures on the surface,further developing into a fault or depression basin that receives deposits.The organic matter can become oil and natural gas under suitable chemical and structural conditions.Under the action of groundwater or other dynamic forces,oil and natural gas are gradually transported to the uplift or the buried hill in the depression zone,and oil and gas fields are formed under the condition of good caprock.The research results can provide new insights into the relationship between deep structures and oil and gas basins as well as assist in the strategic planning of oil and gas exploration activities.Yimi Zhang Wanyin Wang Linzhi Li Xingang Luo Dingding Wang Tao He Feifei Zhang Jing Ma 2023Acta Oceanologica Sinica2023,42,3:0
18Integrated gravity and magnetic study on patterns of petroleum basin occurrence in the China seas and adjacent areas显示文摘The China seas and adjacent areas contain numerous petroleum basins.One of the main challenges for future oil and gas exploration is to identify the inherent patterns of petroleum basin distribution.The formation and evolution of petroleum basins along with the migration and accumulation of oil and gas are often closely related to the tectonic environment.The gravity and magnetic fields with high lateral resolution and wide coverage provide important data for regional tectonic research.Based on the gravity data in the Global Satellite Gravity Anomaly Database(V31.1)and magnetic data from the Earth Magnetic Anomaly Grid(2-arc-minute resolution)(V2),this study uses integrated gravity and magnetic field technique to obtain integrated gravity and magnetic field result for the China seas and adjacent areas,and then adopts the normalized vertical derivative of the total horizontal derivative technique to conduct partition.Finally,it identifies the relationship between the partition characteristics and tectonics as well as the patterns of petroleum basin occurrence.The research shows that the partition of gravity and magnetic field integrated result has a good correlation with the Neo-Cathaysian tectonic system and tectonic units.The petroleum basins are characterized according to three blocks arranged from north to south and four zones arranged from east to west.The north-south block structure causes the uneven distribution of oil and gas resources in the mainland area and the differences in the hydrocarbon-bearing strata.Petroleum basins are more abundant in the north than in the south.The ages of the main oil-and gas-bearing strata are“Paleozoic–Mesozoic,Paleozoic–Mesozoic–Cenozoic,and Paleozoic–Mesozoic”,in order from north to south.The difference in the overall type of oil and gas resources in all basins is controlled by the east–west zonation.From east to west,the oil and gas resource type exhibits a wave-like pattern of“oil and gas,gas,oil and gas,gas”.The vertical distribution is characterized by an upper oil(Mesozoic–Cenozoic)and lower gas(Mesozoic–Paleozoic)structure.Within the study area,the Paleozoic marine strata should be the main strata of future natural gas exploration.Tao He Wanyin Wang Zhizhao Bai Xingang Luo Jing Ma Yimi Zhang 2023Acta Oceanologica Sinica2023,42,3:0
19Study on the distribution characteristics of faults and their control over petroliferous basins in the China seas and its adjacent areas显示文摘As one of the main controlling factors of oil and gas accumulation,faults are closely related to the distribution of oil and gas reservoirs.Studying how faults control petroliferous basins is particularly important.In this work,we investigated the plane positions of major faults in the China seas and its adjacent areas using the normalized vertical derivative of the total horizontal derivative(NVDR-THDR)of the Bouguer gravity anomaly,the fusion results of gravity and magnetic anomalies,and the residual Bouguer gravity anomaly.The apparent depths of major faults in the China seas and its adjacent areas were inverted using the Tilt-Euler method based on the Bouguer gravity anomaly.The results show that the strikes of the faults in the China seas and its adjacent areas are mainly NE and NW,followed by EW,and near-SN.Among them,the lengths of most ultra-crustal faults are in the range of 1000–3000 km,and their apparent depths lie between 10 km and 40 km.The lengths of crustal faults lie between 300 km and 1000 km,and their apparent depths are between 0 km and 20 km.According to the plane positions and apparent depths of the faults,we put forward the concept of fault influence factor for the first time.Based on this factor,the key areas for oil and gas exploration were found as follows:the east of South North China Basin in the intracontinental rift basins;the southeast region of East China Sea Shelf Basin,the Taixinan and Qiongdongnan basins in the continental margin rift basins;Zhongjiannan Basin in the strike-slip pull-apart basins;the Liyue,Beikang,and the Nanweixi basins in the rifted continental basins.This work provides valuable insights into oil and gas exploration,mineral resource exploration,and deep geological structure research in the China seas and its adjacent areas.Xin’gang Luo Wanyin Wang Ying Chen Zhizhao Bai Dingding Wang Tao He Yimi Zhang Ruiyun Ma 2023Acta Oceanologica Sinica2023,42,3:0
20Study on System of Faults in the Gulf of Mexico and Adjacent Region based on Gravity Data显示文摘In the Gulf of Mexico and adjacent landmasses,faults are very complex,and their distribution is closely related to plate tectonics,ocean-land boundary,and former structure.The plane position of the faults can be identified by the maximum characteristic of the vertical derivative of the normalized vertical derivative of the total horizontal derivative(NVDR-THDR)of the Bouguer gravity anomaly.The apparent depth of the faults is inverted by the Bouguer gravity anomaly curvature property.Based on tectonic evolutionary processes and the plane distribution and apparent depth characteristics of the faults,a complete fault system for the Gulf of Mexico and adjacent areas has been established,including 102 faults.The apparent depths of 33 first-class faults are 16-20 km and for 69 second-class faults are 12-16 km.The F_(1-2)and F_(1-3)subduction fault zones are two caused by the subduction of the Cocos Plate into the old Yucatan and Chorti landmasses;F_(1-11)and F_(1-12)fault zones extend westward to the coast of Guatemala and do not extend into the continent;F_(1-17)and F_(1-20)faults,which control the boundary of the oceanic crust,do not extend southward into the continent.The fault system,which radiates in a'fan-shaped'structure as a whole,unfolds to the northeast.Faults of different nature and sizes are distributed in the Cocos Plate subduction zone,Continental,Gulf of Mexico,Yucatan old landmass and Caribbean Plate in NW,NNW,NS,NE and NEE directions.In the Gulf of Mexico region,the fault system is a comprehensive reflection of former tectonic movements,such as plate movement,drift of old landmasses and expansion of oceanic crusts.The first-class faults control the plate and ocean-continental boundaries.The second-class faults are subordinate to the first-class faults or related to the distribution of different sedimentary layers.MA Jie WANG Wanyin DU Xiangdong LUO Xingang CAI Wenjie YANG Min WANG Dingding 2021Acta Geologica Sinica(English Edition)2021,95,1:0
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