|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Slope stability analysis under seismic load by vector sum analysis method显示文摘The vibration characteristics and dynamic responses of rock and soil under seismic load can be estimated with dynamic finite element method(DFEM).Combining with the DFEM,the vector sum analysis method(VSAM) is employed in seismic stability analysis of a slope in this paper.Different from other conventional methods,the VSAM is proposed based on the vector characteristic of force and current stress state of the slope.The dynamic stress state of the slope at any moment under seismic load can be obtained by the DFEM,thus the factor of safety of the slope at any moment during earthquake can be easily obtained with the VSAM in consideration of the DFEM.Then,the global stability of the slope can be estimated on the basis of time-history curve of factor of safety and reliability theory.The VSAM is applied to a homogeneous slope under seismic load.The factor of safety of the slope is 1.30 under gravity only and the dynamic factor of safety under seismic load is 1.21.The calculating results show that the dynamic characteristics and stability state of the slope with input ground motion can be actually analyzed.It is believed that the VSAM is a feasible and practical approach to estimate the dynamic stability of slopes under seismic load. | Mingwei Guo Xiurun Ge Shuilin Wang | 2011 | Journal of Rock Mechanics and Geotechnical Engineering2011，3，3： | 14 |
| 2 | Cation-mixing stabilized layered oxide cathodes for sodium-ion batteries显示文摘Sodium-ion batteries are promising for large-scale energy storage due to sodium's low cost and infinite abundance. The most popular cathodes for sodium-ion batteries, i.e., the layered sodium-containing oxides, usually exhibit reversible host rearrangement between P-type and O-type stacking upon charge/discharge. Herein we demonstrate that such host rearrangement is unfavorable and can be suppressed by introducing transition-metal ions into sodium layers. The electrode with stabilized P3-type stacking delivers superior rate capability, high energy efficiency, and excellent cycling performance. Owing to the cation-mixing nature, it performs the lowest lattice strain among all reported cathodes for sodium-ion batteries. Our findings highlight the significance of a stable host for sodium-ion storage and moreover underline the fundamental distinction in material design strategy between lithium-and sodium-ion batteries. | Shaohua Guo Yang Sun Pan Liu Jin Yi Ping He Xiaoyu Zhang Yanbei Zhu Ryosuke Senga Kazu Suenaga Mingwei Chen Haoshen Zhou | 2018 | Science Bulletin2018，63，6： | 5 |
| 3 | Ex situ and in situ AFM investigations on the growth of the (100) face of KDP with different pH values显示文摘Through investigations on the growth of the (100) face of potassium dihydrogen phosphate (KDP) crystal by ex situ atomic force microscopy (AFM) with different pH values at different supersaturations at 40°C,it was found that the growth of crystal was controlled by step flow at lower supersaturations,and the morphologies of steps were different under different growth conditions.In addition,at the higher supersaturations,2D nucleation mechanism controlled the growth.When the supersaturations were lower,the dislocation mechanism controlled the growth of crystal,and when σ≥0.05,2D nucleation mechanism played a dominant role in the growth of the (100) face for pH=4.2 and pH=2.5.However,for pH=5.0,the dislocation mechanism also dominated the growth of crystal when the supersaturations were lower,but when σ≥0.03,the crystal growth was controlled by 2D nucleation mechanism.Through investigations on the step flow of the (100) face of KDP crystal by in situ AFM with different pH values at lower supersaturations at 25°C,the velocities of normal growth of the (100) face were estimated at different growth conditions by in situ AFM.It was found that when the pH value was 5.0,the normal growth rate was the fastest at the same supersaturation compared to the other pH values and screw dislocation mechanism controlled the crystal growth.In addition,we found that with the reduction of the supersaturation of the solution,the density of steps also decreased,the width of steps became larger.Finally,a phenomenon which was the obvious anisotropic growth of steps in the step flow was observed by in situ AFM at σ=0.025 at pH=5.0. | CHENG Min,LI MingWei,GUO JinLi & CAO YaChao College of Power Engineering,Chongqing University,Chongqing 400030,China | 2010 | Science China(Technological Sciences)2010，53，6： | 4 |
| 4 | Extraction of Aluminum Hydroxide from Coal Fly Ash Pre -Desilication and Calcination Methods显示文摘 | Wang Mingwei Yang Jing Ma Hongwen Shen Jie Li Jinhong Guo Feng | 2011 | Advanced Materials Research2011，，： | 1 |
| 5 | Genetic effects on Fe, Zn, Mn and P contents in Indica black pericarp rice and genetic correlations with grain characteristics显示文摘 | Zhang Mingwei Guo Baojiang Peng Zhengming | 2004 | Euphytica2004，135，3： | 1 |
| 6 | Analyzing Antarctic ice sheet snowmelt with dynamic Big Earth Data显示文摘Big Earth Data—big data associated with Earth sciences—can potentially revolutionize research on climate change,sustainable development,and other issues of global concern.For example,analyzing massive amounts of satellite imagery of polar environments,which are sensitive to the effects of climate change,provides insights into global climate trends.This study proposes a method to use Big Earth Data to explore changes in snowmelt over the Antarctic ice sheet from 1979 to 2016.The method uses Zernike moments to observe melt area in Antarctica and uses the Mann-Kendall test to detect temporal changes and abnormal information about the continent’s melt area.The melting trend in the time-series data matched the changes in temperature and seasonal transitions.The results do not demonstrate significant change in the area of surface melt;however,abrupt changes in melt conditions linked to temperature changes over the Antarctic ice sheet were observed within the time series.The experiment results demonstrate that the proposed method is robust,adaptive,and capable of extracting the core features of melting snow. | Dong Liang Huadong Guo Lu Zhang Mingwei Wang Lizhe Wang Lei Liang Zeeshan Shirazi | 2021 | International Journal of Digital Earth2021，14，1： | 1 |
| 7 | Targeting of integrin-linked kinase with a small interfering RNA suppresses progression of experimental proliferative vitreoretinopathy显示文摘 | Lili Guo Wenzhen Yu Xiaoxin Li Gang Zhao Jianhong Liang Peiying He Kai Wang Peng Zhou Yanrong Jiang Mingwei Zhao | 2008 | Experimental Eye Research2008，，6： | 1 |
| 8 | Fast object detection based on selective visual attention显示文摘 | Guo Mingwei Zhao Yuzhou Zhang Chenbin | 2014 | Neurocomputing2014，144，： | 1 |
| 9 | Ultra-high strength yet superplasticity in a hetero-grain-sized nanocrystalline Au nanowire显示文摘Nanocrystalline metals often display a high strength up to the gigapascal level,yet they suffer from poor plasticity.Previous studies have shown that the development of hetero-sized grains can efficiently overcome the strength-ductility trade-off of nanocrystalline metals.However,whether this strategy can lead to the fabrication of nanocrystalline nanowires exhibiting both high strength and superplasticity is unclear,similar to the atomistic deformation mechanism.In this paper,we show that ultra-small nanocrystalline Au nanowires comprising grains in both the Hall–Petch and inverse Hall–Petch grain-size regions can exhibit extremely high uniform elongation(236%)and high strength(2.34 gigapascals)at room temperature.In situ atomic-scale observations revealed that the plastic deformation underwent two stages.In the first stage,the super-elongation ability originated from the intergrain plasticity of small grains via mechanisms such as grain boundary migration and grain rotation.This intergrain plasticity caused the grains in the heterogeneous-structured nanowires to grow very large.In the second stage,the superelongation ability originated from intragrain plasticity accompanied by the diffusion of surface atoms.Our results show that the hetero-grain-sized nanocrystalline nanowires,comprising grains with sizes both in the strongest Hall–Petch effect region and the inverse Hall–Petch effect region,were simultaneously ultrastrong and ductile.They displayed neither a strength-ductility trade-off nor plastic instability. | Libo Fu Deli Kong Chengpeng Yang Jiao Teng Yan Lu Yizhong Guo Guo Yang Xin Yan Pan Liu Mingwei Chen Ze Zhang Lihua Wang Xiaodong Han | 2022 | Journal of Materials Science & Technology2022，，6： | 1 |
| 10 | Core–Shell‐Structured CNT@RuO2 Composite as a High‐Performance Cathode Catalyst for Rechargeable Li–O2 Batteries显示文摘 | Zelang Jian Pan Liu Fujun Li Ping He Xianwei Guo Mingwei Chen Haoshen Zhou | 2014 | Angew. Chem. Int. Ed2014，，2： | 1 |
| 11 | Integrated representation of geospatial data,model,and knowledge for digital twin railway显示文摘The real-time accurate description of all spatial features of railway and their spatiotemporal relationships is a crucial factor in realizing comprehensive management and related decision-making within the entire life cycle of railways.Nevertheless,available spatiotemporal data models mainly use static historical sequence data,which are insufficient to support multi-source heterogeneous real-time sensed data;they lack a systematic depiction of the interactive relationships among multiple feature entities,and are limited to low-level descriptive analysis.Therefore,this study proposes a data-model-knowledge integrated representation data model for a digital twin railway,which explicitly describes the spatiotemporal,and interaction relationships among railway features through a conceptual knowledge graph.This study first analyzes the characteristics of railway features from above ground to underground,and then constructs a conceptual model to clearly describe the complex relationships among railway features.Secondly,a logical model is developed to illustrate the basic data structure.Thirdly,an ontology model is constructed as a basic framework for further deepening the domain knowledge graph.Finally,considering the prevention of landslides as an example,it demonstrates the abundant spatiotemporal relationships among railway related features.The results of this study bring more clear understanding of the complex interactive relationships of railway entities. | Hankan Li Qing Zhu Liguo Zhang Yulin Ding Yongxin Guo Haoyu Wu Qiang Wang Runfang Zhou Mingwei Liu Yan Zhou | 2022 | International Journal of Digital Earth2022，15，1： | 1 |
| 12 | Computed tomography-guided percutaneous radiofrequency thermocoagulation for primary trigeminal neuralgia in older and younger patients显示文摘We evaluated the immediate and long-term clinical efficacy of computed tomography (CT)-guided radiofrequency thermocoagulation for primary trigeminal neuralgia (RTPTN) in 852 patients includ-ing 502 patients aged ≥ 60 years and 350 patients aged < 60 years.After discharge,the incidence of complications was 1.0% and 0.9% in patients aged ≥ 60 years and patients aged < 60 years,respectively.Over 3-year follow-up after CT-guided RTPTN,96.8% of the patients aged ≥ 60 years and 98.6% of the patients aged < 60 years were completely pain-free,and there was no significant difference between these two age brackets.In addition,there were no significant differences in quality of life scores and numbness scores between these two age brackets.These findings suggest that CT-guided RTPTN is a safe and effective method and is recommended for older and poor-risk patients. | Guanghui Lai Jiaxiang Ni Baishan Wu Mingwei He Liqiang Yang Jianning Yue Yuna Guo | 2011 | Neural Regeneration Research2011，6，24： | 0 |
| 13 | Efficient and Generic Preparation of Diverse Polyelectrolyte Nanogels by Electrostatic Assembly Directed Polymerization显示文摘Nanogels hold promise as soft and functional carriers and nanoreactors,but whether they will ever reach the stage of large-scale application depends crucially on efficient production methods,and on what interesting properties and functionalities they can have.In particular,nanogels consisting of highly charged polyelectrolyte have not yet been very much explored.Here,the authors present a novel and generic strategy for controlled and efficient synthesis of a large diversity of polyelectrolyte nanogels.The method is based on polymerizing an ionic monomer in the presence of an oppositely charged polyion-neutral diblock copolymer as template,while adding a cross-linker.The growing polymer chains assemble with the template,forming polyion complex micelles,which dissociate upon increasing salt concentration.Subsequent separation yields nanogels with well-controlled size and properties,and free template polymers that can be used again.Our design can be applied generally to a wide range of both cationic and anionic monomers,as well as various cross-linkers.Scaled-up production presents no problems as increasing monomer concentration(hundreds of mM)and reaction volume(up to 1 L)hardly compromise product quality.Moreover,the obtained nanogels with their well-controlled size,morphology,chemistry,and cross-linking degree perform well as soft nanocarriers and catalytic nanoreactors. | Peng Ding Jianan Huang Cheng Wei Wei Liu Wenjuan Zhou Jiahua Wang Mingwei Wang Xuhong Guo Martien A.Cohen Stuart Junyou Wang | 2020 | CCS Chemistry2020，2，6： | 0 |
| 14 | Endoplasmic reticulum stress-induced NLRP3 inflammasome activation as a novel mechanism of polystyrene microplastics (PS-MPs)-induced pulmonary inflammation in chickens显示文摘Microplastics(MPs)have attracted growing attention worldwide as an increasingly prevalent environmental pollutant.In addition,chicken meat is currently the most widely consumed kind of poultry in the global market.Consumer demand for chicken is on the rise both at home and abroad.As a result,the safety of chicken raising has also received significant attention.The lungs play an essential role in the physiological activities of chickens,and they are also the most vulnerable organs.Lung injury is difficult to repair after the accumulation of contaminants,and the mortality rate is high,which brings huge economic losses to farmers.The research on the toxicity of MPs has mainly focused on the marine ecosystem,while the mechanisms of toxicity and lung damage in chickens have been poorly studied.Thus,this study explored the effects of exposure to polystyrene microplastics(PS-MPs)at various concentrations for 42 d on chicken lungs.PS-MPs could cause lung pathologies and ultrastructural abnormalities,such as endoplasmic reticulum(ER)swelling,inflammatory cell infiltration,chromatin agglutination,and plasma membrane rupture.Simultaneously,PS-MPs increased the expression of genes related to the heat shock protein family(Hsp60,Hsp70,and Hsp90),ER stress signaling(activating) transcription factor 6(ATF0),ATF4,protein kinase RNA-like ER kinase(PERK),and eukaryotic translation initiation factor 2 subunitα(eIF2a),pyroptosis-related genes(NOD)-,LRR-and pyrin domain-containing protein 3(NLRP3),apoptosis-associated speck-like protein containing a caspase recruitment domain(ASC),interleukin-1β(IL-1β),cysteinyl aspartate-specific proteinase 1(Caspasel),and gasdermin-D(GSDMD),and the inflammatory signaling pathway(nuclear factor-kB(NF-kB),inducible nitric oxide synthase(iNOS),and cyclooxygenase-2(COX-2).The above results showed that PS-MP exposure could result in lung stress,ER stress,pyroptosis,and inflammation in broilers.Our findings provide new scientific clues for further research on the mechanisms of physical health and toxicology regardingMPs. | Hongmin LU Tiantian GUO Yue ZHANG Dewang LIU Lulu HOU Chengxue MA Mingwei XING | 2024 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2024，25，3： | 0 |
| 15 | Temperature dependence simulation and characterization for InP/InGaAs avalanche photodiodes显示文摘Based on the newly proposed temperature dependent dead space model,the breakdown voltage and bandwidth of InP/InGaAs avalanche photodiode (APD) have been investigated in the temperature range from -50℃ to 100℃.It was demonstrated that our proposed model is consistent with the experimental results.Our work may provide a guidance to the design of APDs with controllably low temperature coefficient. | Yanli ZHAO Junjie TU Jingjing XIANG Ke WEN Jing XU Yang TIAN Qiang LI Yuchong TIAN Runqi WANG Wenyang LI Mingwei GUO Zhifeng LIU Qi TANG | 2018 | Frontiers of Optoelectronics2018，11，4： | 0 |
| 16 | Impact of seepage flow on sediment resuspension by internal solitary waves:parameterization and mechanism显示文摘Sediment incipient motion is the first step in sediment resuspension.Previous studies ignored the effect of seepage flow on the mobility of sediment particles and simplified the seabed surface as a rigid boundary.A flume experiment was designed to innovatively divide the seabed into two parts to control the dynamic response of the seabed and control the seepage conditions.In the experiment,the seabed sediments and the amplitude of internal solitary waves(ISWs)were changed to compare and analyze the impact of seepage flow on the sediment resuspension by shoaling ISWs.Moreover,parametric research and verification were carried out.Results indicate that seepage flow can greatly influence fine sand,promote sediment resuspension,and increase the amount of suspension by two times on average.However,seepage flow had a little effect on the suspension of clayey silt and sandy silt.Besides,seepage force was added to the traditional gravity,drag force,and uplift force,and the parameterization of threshold starting shear stress of coarse-grained sediments was developed.The results of this parameterization were verified,and seepage force was critical to parameterization.The threshold starting shear stress was reduced by 54.6%after increasing the seepage force.The physical mechanism of this process corresponded to the vertical reciprocating transient seepage in and out the seabed interface caused by the wave-induced transient excess pore water pressure.This quantitative study on seepage flow for shear stress of coarse-grained sediments induced by ISWs is critical to geohazard assessment. | Zhuangcai TIAN Chao LIU Ziyin REN Xiujun GUO Mingwei ZHANG Xiuhai WANG Lei SONG Yonggang JIA | 2023 | Journal of Oceanology and Limnology2023，41，2： | 0 |
| 17 | Rock physics model for velocity–pressure relations and its application to shale pore pressure estimation显示文摘Acoustic wave velocity has been commonly utilized to predict subsurface geopressure using empirical relations.Acoustic wave velocity is, however, affected by many factors. To estimate pore pressure accurately, we here propose to use elastic rock physics models to understand and analyze quantitatively the various contributions from these different factors affecting wave velocity. We report a closed-form relationship between the frame flexibility factor(γ) in a rock physics model and differential pressure, which presents the major control of pressure on elastic properties such as bulk modulus and compressional wave velocity. For a gas-bearing shale with abundant micro-cracks and fractures, its bulk modulus is much lower at abnormally high pore pressure(high γ values) where thin cracks and flat pores are open than that at normal hydrostatic pressure(low γ values) where pores are more rounded on average. The developed relations between bulk modulus and differential pressure have been successfully applied to the Upper Ordovician Wufeng and Lower Silurian Longmaxi formations in the Dingshan area of the Sichuan Basin to map the three-dimensional spatial distribution of pore pressure in the shale, integrating core, log and seismic data. The estimated results agree well with field measurements. Pressure coefficient is positively correlated to gas content. The relations and methods reported here could be useful for hydrocarbon exploration, production, and drilling safety in both unconventional and conventional fields. | GUO Jingyi LI Min ZHUANG Mingwei SUN Yuefeng | 2023 | Petroleum Exploration and Development2023，50，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员