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A remote sensing monitoring method for alpine grasslands desertification in the eastern Qinghai–Tibetan Plateau

Journal of Mountain Science 2020年第6期17卷 1423-1437页

作者： KUANG Qian yuAN Quan-zhi HAN Ji-chong LENG Rong wang yu-shuang ZHU Ke-hong LIN Shuo REN Ping Key Laboratory of Land Resources Evaluation and Monitoring in Southwest Ministry of EducationSichuan Normal UniversityChengdu 610068China Institute of Geography and Resources Science Sichuan Normal UniversityChengdu 610068China Key Laboratory of Environmental Change and Natural Disaster MOE/State Key Laboratory of Earth Surface Processes and Resources EcologyFaculty of Geographical ScienceAcademy of Disaster Reduction and Emergency ManagementBeijing Normal UniversityBeijing 100875China Department of Engineering Physics Tsinghua UniversityBeijing 100084China Collge of Resources Sichuan Agricultural UniversityChengdu 611130China

Alpine grassland is the typical vegetation in the eastern Qinghai–Tibetan Plateau,which has important ecological service functions,and also supports the development of alpine stock *** recent years,under both the natural and human disturbance,alpine grasslands in this area have appeared to different degrees of desertification.A diagnosis of the desertification degree serves as the basis for grassland ecological *** study constructs a comprehensive index based on remote sensing called alpine grassland desertification index(AGDI)to monitor the areas and degree of *** most relevant indicators of desertification,namely,vegetation fraction,aboveground biomass,soil moisture,and land surface temperature,were selected to establish *** geographical detector is used to reselect and assess these *** results show that the overall verification accuracy of AGDI is 82.05%.In particular,the accuracy of identifying severe desertification is the *** study confirms that the desertification of alpine grasslands in the eastern Qinghai–Tibetan Plateau is characterized by ***,Landsat-8 OLI data with a spatial resolution of 30 m is more suitable than MODIS data for alpine grasslands desertification *** research results can provide a methodological reference for monitoring desertification of alpine grasslands and other grassland regions in the world.

关键词： Desertification monitoring Alpine grassland desertification index(AGDI) Geographical detector Zoige county

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Hepatitis B virus infection:A favorable prognostic factor for intrahepatic cholangiocarcinoma after resection

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World Journal of Gastroenterology 2011年第10期17卷 1292-1303页

作者： Hua-Bang Zhou Hui wang yu-Qiong Li shuang-Xi Li Hao wang Dong-Xun Zhou Qian-Qian Tu Qing wang Shan-Shan Zou Meng-Chao Wu He-Ping Hu Departmentof Comprehensive Treatment II Eastern Hepatobiliary Surgery Hospital Second Military Medical University Shanghai 200433 China

AIM： To study the prognostic factors for intrahepatic cholangiocarcinoma （ICC） and evaluate the impact of chronic hepatitis B virus （HBV） infection on survival rate of ICC patients. METHODS： A total of 155 ICC patients who underwent macroscopic curative resections （R0 and R1） were enrolled in this retrospective study and divided into group A with HBV infection and group B without HBV infection according to their chronic HBV infection, represented by positive hepatitis B surface antigen （HBsAg） in serum or in liver tissue. Clinicopathological characteristics and survival rate of the patients were evaluated. RESULTS： All patients underwent anatomical resection. Their 1- and 3-year survival rates were 60.6% and 32.1%, respectively. Multivariate analyses revealed that HBV infection, hepatolithiasis, microscopic satellite lesion, and lymphatic metastasis were the independent prognostic factors for the survival rate of ICC patients. The median disease-free survival time of the patients was 5.0 too. The number of tumors, microscopic satellite lesion, and vascular invasion were the independent prognostic factors for the disease-free survival rate of the patients. The prognostic factors affecting the survival rate of ICC patients with HBV infection and those without HBV infection were not completely consistent. Alkaline phosphatase 〉 119 U/L, microscopic satellite lesion, vascular invasion, and lymphatic metastasis were the independent factors for the patients with HBV infection, while r-glutamyltransferase 〉 64 U/L, microscopic satellite lesion, and poor tumor differentiation were the independent factors for the patients without HBV infection. CONCLUSION： HBV infection is a valuable clinical factor for predicting tumor invasiveness and clinical outcome of ICC patients. ICC patients with HBV infection should be distinguished from those without HBV infection because they have different dinicopathological characteristics, prognostic factors and outcomes after surgical resectio

关键词： Intrahepatic cholangiocarcinoma Hepatitis B virus Survival Prognosis

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Turbulent Agglomeration of Microparticles in a Cylinder Wake Flow Using LES-DEM:Focusing on the Effect of the Reynolds Number

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Journal of Thermal Science 2025年第1期34卷 34-49页

作者： wang shuang MU Lin LI Xue XIE Jun DONG Ming School of Energy and Power Engineering Dalian University of Technology School of Optical Information and Energy Engineering Wuhan Institute of Technology School of Energy and Environment Shenyang Aerospace University

Turbulent agglomeration is viewed as a promising technology for enhancing fine particle removal *** better understand particle transport,agglomeration behaviors,and fluid-particle interactions,we numerically explored these phenomena under cylindrical vortex wake influence using a coupled large eddy simulation and discrete element method（LES-DEM） *** validity of the LES approach was verified by comparison with available direct numerical simulation（DNS） *** adopted the Johnson-Kendall-Roberts（JKR） contact model for particle-particle *** particle dispersion and agglomeration characteristics of particles with different diameters（dp=2-20 μm） in the laminar and transition of shear layer（TrSL） flow regimes were *** particles were concentrated at the vortex centers,while larger particles accumulated around the *** agglomeration efficiency exhibited an M-shaped profile spanwise（y-direction）.With increasing Reynolds number,the agglomeration efficiency and turbulence intensity *** particle agglomeration efficiency peaks at a certain Reynolds ***,at higher Reynolds numbers,reducing the residence time of particles in the flow field decreases the agglomeration efficiency.

关键词： discrete element method large eddy simulation microparticle particle agglomeration

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Detection of Hepatitis E Virus and Serum Antibodies against Hepatitis E Virus in Livestock in Heilongjiang Province

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Animal Husbandry and Feed Science 2011年第6期3卷 23-25页

作者： LI Ming-tang wang Qing-shuang yu yuan-hua School of Life Science and Technology Changchun University of Science and Technology Changchun 130022 China

[Objective] To observe the distribution of hepatitis E virus （HEV） in livestock in Hailongjiang Province. [Method] The serum samples collected from two regions of Heilongjiang Province included 719 samples from pigs older than 3 months old, 840 samples from pigs younger than 3 months old, 505 bovine serum samples and 515 ovine serum samples. The samples were detected by enzyme-linked immunosorbent assay （ ELISA）. [ Result] The pigs had the highest level of antibodies against HEV, and the positive rate of HEV was 89.71%, indicating pigs were more likely to be infected by HEV than other livestock populations. HEV was detected in 59 porcine serum samples, three bovine serum samples and one ovine serum sample collected from Heilongjiang Province. The positive rate of HEV in pigs was higher in Heilongjiang Province than in Jinlin Province and Liaoning Province. [ Conclusion] HEV infection was wide in pigs in Heilongjiang Province, and the infection rate was higher in the old pigs than in the young pigs.

关键词： Heilongjiang Province Hepatitis E virus Monoclonal antibodies Immunolocalization

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Post-tunable salt gel electrolytes toward flexible supercapacitor switches

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Journal of Energy Chemistry 2025年第1期100卷 114-124页

作者： Hui wang shuang Chen Xuming Liu Qin Zhang Xin Liu Polymeric and Soft Materials Laboratory School of Chemistry and Life Science and Advanced Institute of Materials Science Changchun University of Technology Polymeric and Soft Materials Laboratory School of Chemical Engineering and Advanced Institute of Materials Science Changchun University of Technology

Convertible hydrogel supercapacitors have emerged as promising energy storage devices in switches,diodes, and transistors. However, inherent weaknesses in ionic conductivity, mechanical properties,and water retention of hydrogel electrolytes seriously hinder their development. Inspired by the hardness conversion of sea cucumber skin, a conductivity and mechanics dual-tunable salt gel electrolyte is successfully designed. The salt gel presents a reversible switching of conductors-insulators and a mechanical regulation between softness and hardness via the dissolution-crystallization transition of sodium acetate trihydrate（SAT）. Meanwhile, the salt gels spontaneously grow a layer of “armor” through saturated phase-change salt crystals effectively reducing water evaporation of hydrogel ***, this phase-change soft-rigid conversion strategy will expand the capabilities of gel-based flexible supercapacitors(area capacitance: 258.6 mF cm-2), and the capacitance retention rate could still reach 86.9% after 3000 cycles at high temperatures. Moreover, the salt gel supercapacitor is potentially used in over-heat alarm systems. It is anticipated that the strategy of conductivity and mechanics of dual-tunable salt gel would provide a new perspective on the development of energy storage devices,wearable electronics, and flexible robots.

关键词： Capacitance

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Experimental Research on a Feasible Building Insulation Material Based Reed in China

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Journal of Thermal Science 2025年第1期34卷 176-187页

作者： LIU Tiantian PENG Yizhe LIU Lifang CAI Chenghan wang shuang LI Hongqiang College of Civil Engineering Hunan University College of Civil Engineering Hunan University of Science and Technology School of Energy and Power Jiangsu University of Science and Technology National Center for International Research Collaboration in Building Safety and Environment (NCIRCBSE) Hunan University Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education Hunan University

The seemingly useless reeds are prepared as thermal insulation materials,which not only meet the requirements of environmental sustainability but also enhance the added value of reeds,creating new economic *** hydrophobicity of raw biomass surfaces leads to problems such as weak bonding strength and non-dense structure in the formed materials,as well as issues related to the residual insect infestations on the *** this study,reed straw was used as the raw material,and foamed geopolymer was used as the binder to prepare building insulation materials based *** improve the interfacial adhesion performance between reed straw and foamed geopolymer,a thermochemical modification method-thermal carbonization,was *** this study,the mechanical properties and hydraulic properties of the studied materials with different degrees of surface thermal modification were tested,especially the fire resistance performance,and weathering resistance performance rarely found in published *** the surface thermal modification condition of reed straw was 250℃（30 min）,the comprehensive performance of reed-based building insulation materials was the best,when the studied material density was 321.3 kg/m3;the compressive strength was 0.59 MPa;the thermal conductivity was 0.101 W/（m·K）;the pH was 11.27;the moisture absorption rate was 25.1%,and the compressive strength loss rate in wet-dry cycles was 18.5%.In addition,it had excellent fire resistance performance and weathering resistance *** new material can be widely used to improve the thermal insulation of traditional buildings and as sandwich filler in prefabricated buildings,such as preparing insulating walls.

关键词： building insulation material based reed fire resistance performance interface adhesion properties pre-treatment of reeds weathering resistance performance

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环境规制、技术进步偏向与劳动收入份额

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商业研究 2022年第4期 29-42页

作者：王玉爽南开大学经济学院天津300071

本文基于CES生产函数,构建理论框架揭示环境规制对劳动收入份额的作用过程,阐释环境规制影响技术进步偏向进而影响劳动收入份额的路径及机制,并采用超越对数生产函数方法测算各省技术进步偏向指数,利用2000-2018年中国大陆地区各省份数... 详细信息

本文基于CES生产函数,构建理论框架揭示环境规制对劳动收入份额的作用过程,阐释环境规制影响技术进步偏向进而影响劳动收入份额的路径及机制,并采用超越对数生产函数方法测算各省技术进步偏向指数,利用2000-2018年中国大陆地区各省份数据和中介效应模型,运用SYS-GMM法进行实证检验。研究发现:环境规制对劳动收入份额呈现先抑制后促进的影响特征,当前我国环境规制实施强度已过拐点,有利于促进劳动收入份额上升;影响机制分析表明,环境规制通过技术进步偏向这一路径促进劳动收入份额的上升。环境规制处于促进技术进步偏向劳动的阶段;进一步的分区域分析表明,环境规制对南方、北方地区劳动收入份额的影响均呈U形且已过拐点,但中介效应只存在于南方地区。因此,政府和环保部门要灵活采用环境规制政策,不应不计民生影响地达到环保指标,忽视政策对劳动力相对资本的使用效率、技术进步偏向性的影响,最终导致劳动者收入承受环境规制的主要影响。

关键词：环境规制劳动收入份额技术进步偏向中介效应

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海底电缆埋设保护施工中BPI指数应用研究

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科学技术与工程 2012年第7期20卷 1474-1477,1483页

作者：王裕霜广东天广工程监理咨询有限公司广州510623

500 kV海底电缆埋设保护工程施工中,针对海缆路由海床地质不同的不排水抗剪强度,采用BPI掩埋指数确认海缆保护的埋深值。对《拖网承板与锚具穿入海床深度》DNV研究报告进行了讨论分析。在海缆埋设保护工程实践中,基于DNV研究报告,应用... 详细信息

500 kV海底电缆埋设保护工程施工中,针对海缆路由海床地质不同的不排水抗剪强度,采用BPI掩埋指数确认海缆保护的埋深值。对《拖网承板与锚具穿入海床深度》DNV研究报告进行了讨论分析。在海缆埋设保护工程实践中,基于DNV研究报告,应用研究作图分析法和统计分析法,对海缆路由钻探点外区间确认海床不排水抗剪强度值,以判定海缆埋设施工质量和作业效率。

关键词：海底电缆埋设保护掩埋指数应用研究

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Analysis of Micromechanical Properties at the Interface of Pre-wet SBS Modified Asphalt Mixture Based on Molecular Simulation Technology

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 103-113页

作者： CHEN Wuxing CHEN shuang yu Yan ZHANG Jiangyi XU Haiyang GUO Wei School of Mines China University of Mining and TechnologyXuzhou 221000China College of Construction Engineering Jilin Uni-versityChangchun 130026China

The pre-wetting of aggregate surface is a means to improve the interface performance of SBS modified asphalt and *** effect of pre-wetting technology on the interaction between SBS modified asphalt and aggregate was analyzed by molecular dynamics *** diffusion coefficient and concentration distribution of SBS modified asphalt on aggregate surface are *** simulation results show that the diffusion coefficient of the aggregate surface of SBS modified asphalt is increased by 47.6%and 70.5%respectively after 110#asphalt and 130#asphalt are *** concentration distribution of SBS modified asphalt on the aggregate surface after pre-wetting is more *** to the results of interface energy calculation,the interface energy of SBS modified bitumen and aggregate can be increased by about 5%after *** to the results of molecular dynamics simulation,the pre-wetting technology can effectively improve the interface workability of SBS modified bitumen and aggregate,so as to improve the interface performance.

关键词： pre-wet oil-stone interface interface interaction interface mechanics molecular dynamics simulation

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Silk damping in scalar-induced gravitational waves: a novel probe for new physics

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 79-85页

作者： Yan-Heng yu Sai wang Theoretical Physics Division Institute of High Energy Physics Chinese Academy of Sciences School of Physics University of Chinese Academy of Sciences

Silk damping is well known in the study of cosmic microwave background（CMB） and accounts for suppression of the angular power spectrum of CMB on large angular multipoles. In this article, we study the effect of Silk damping on the scalar-induced gravitational waves（SIGWs）. Resulting from the dissipation of cosmic fluid, the Silk damping notably suppresses the energydensity spectrum of SIGWs on scales comparable to a diffusion scale at the decoupling time of weakly-interacting particles. The effect offers a novel observable for probing the underlying particle interaction, especially for those mediated by heavy gauge bosons beyond the standard model of particles. We anticipate that pulsar timing arrays are sensitive to gauge bosons with mass ～10～3-10～4 GeV, while space-and ground-based interferometers to those with mass ～10～7-1012GeV, leading to essential complements to on-going and future experiments of high-energy physics.

关键词： scalar-induced gravitational waves Silk damping new physics

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