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Kinematics and amplitude evolution of global coronal extreme ultraviolet waves

Research in Astronomy and Astrophysics 2012年第1期12卷 104-114页

作者： ting Li Jun Zhang Shu-hong Yang Wei Liu Key Laboratory of Solar Activity National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Lockheed Mrtin Solar and Astrophysics Laboratory Department ADBS Building 252 3251 Hanover Street Palo Alto CA 94304 USA W. W. Hansen Experimental Physics Laboratory Stanford University Stanford CA 94305 USA

With the observations of the Solar-Terrestrial Relations Observatory （STEREO） and the Solar Dynamics Observatory （SDO）, we analyze in detail the kine- matics of global coronal waves together with their intensity amplitudes （so-called ＂perturbation profiles＂）. We use a semi-automatic method to investigate the pertur- bation profiles of coronal waves. The location and amplitude of the coronal waves are calculated over a 30~ sector on the sphere, where the wave signal is strongest. The position with the strongest perturbation at each time is considered as the location of the wave front. In all four events, the wave velocities vary with time for most of their lifetime, up to 15 rain, while in the event observed by the Atmospheric Imaging Assembly there is at, additional early phase with a much higher velocity. The velocity varies greatly between different waves from 216 to 440 km s-1. The velocity of the two waves initially increases, subsequently decreases, and then increases again. Two other waves show a deceleration followed by an acceleration. Three categories of am- plitude evolution of global coronal waves are found for the four events. The first is that the amplitude only shows a decrease. The second is that the amplitude initially increases and then decreases, and the third is that the amplitude shows an orderly in- crease, a decrease, an increase again and then a decrease. All the extreme ultraviolet waves show a decrease in amplitude while propagating farther away, probably because the driver of the global coronal wave （coronal mass ejection） is moving farther away from the solar surface.

关键词： Sun: corona -- Sun: coronal mass ejections (CMEs) -- Sun: flares

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The Hybrid Nature of 0846+51W1: a BL Lac Object with a Narrow Line Seyfert 1 Nucleus

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Chinese Journal of Astronomy and Astrophysics 2005年第1期5卷 41-48页

作者： hong-YanZhou ting-GuiWang Xiao-BoDong ChengLi Xue-GuangZhang CenterforAstrophysics UniversityofScienceandTechnologyofChinaHefei230026

We found a NLS1 nucleus in the extensively studied eruptive BL Lac object, 0846+51W1, out of a large sample of NLS1s compiled from the spectroscopic dataset of SDSS DR1. Its optical spectrum can be well decomposed into three components: a power law component from the relativistic jet, a stellar component from the host galaxy, and a component from a typical NLS1 nucleus. The emission line properties of 0846+51W1, FWHM (Hβ) (?) 1710 km s-1 and [OⅢ]λ5007/Hβ(?)0.32 from its SDSS spectrum observed when it was in the faint state, fulfil the conventional definition of NLS1. Strong Fell emission is detected in the SDSS spectrum, which is also typical of NLS1s. We tried to estimate its central black hole mass using various techniques and found that 0846+51W1 is very likely emitting at a few ×10% of the Eddington luminosity. We speculate that Seyfert-like nuclei, including NLS1s, might be concealed in a significant fraction of BL Lacs but have remained largely unobserved because, often, their optical-UV continuum is overwhelmed by the synchrotron emission.

关键词： galaxies: active - galaxies: Seyfert - galaxies: BL Lacertae - quasars: indevidual (0846+51W1) - radiation: lines continuum

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Nonequilibrium Grain Boundary Segregation of Phosphorus in Ni-Cr-Fe Superalloy

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Journal of Iron and Steel Research International 2011年第6期18卷 61-67页

作者： WANG Kai SI hong YANG Chun XU ting-dong Superalloy Department Central Iron and Steel Research Institute Beijing 100081 China National Analysis Center of Iron and Steel Central Iron and Steel Research Institute Beijing 100081 China

In virtue of Auger electron spectroscopy, the grain boundary concentrations of phosphorus in Ni-Cr-Fe superalloy are measured after solution treatment at 1 180 ℃ for 45 min. The results show that a peak of phosphorus concentration occurs at about 180 min during isothermal ageing at 500 ℃, and a maximum concentration of phosphorus appears also at about 500 ℃ for all specimens aged for 20 min at temperatures of 200, 400, 500, 700 and 800 ℃. The results are analyzed with the laws of nonequilibrium grain boundary segregation. It is found from the analysis that peaks are related to critical time for nonequilibrium grain boundary segregation of phosphorus.

关键词： nonequilibrium segregation grain boundary phosphorus nickel based superalloy

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Synthesis and properties of electrodeposited Ni-CeO_2 nano-composite coatings

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Rare Metals 2018年第2期37卷 148-153页

作者： Hui Jin Yi-Yong Wang Yu-ting Wang hong-Bing Yang School of Materials and Metallurgy University of Science and Technology Liaoning School of Material Science and Engineering Shenyang University of Technology Laser Advanced Manufacturing Technology Center University of Science and Technology Liaoning

Current machinery requires metallic materials to have better surface properties. Based on an orthogonal experimental design and analysis method, the CeO2-rein- forced nickel nano-composite coatings were prepared by direct current electrodeposition in a nickel sulfate bath containing CeO2 nanoparticles. Statistical results indicate that current density is the most significant variable in the electrodeposition processing, while temperature is the least important factor. The microstructure of Ni and Ni-CeO2 nano-composite coatings was characterized by scanning electron microscopy （SEM） equipped with energy-disper- sive spectroscopy （EDS）, and X-ray diffraction （XRD）. The microhardness of the Ni coating is enhanced by the incorporation of CeO2 nanoparticles. Potentiodynamic polarization and electrochemical impedance spectroscopy （EIS） were used to characterize the corrosion behavior of Ni and Ni-CeO2 coatings. These studies show that Ni- CeOz coating has better corrosion resistance compared to Ni coating.

关键词： Electrodeposition Nano-composite coatings Ce02 nanoparticles Corrosion resistance

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Site selection of self-driving and recreational vehicle camps in China:An investigation using analytic hierarchy process and entropy

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Journal of Traffic and Transportation Engineering(English Edition) 2021年第5期8卷 762-777页

作者： Hua Ding Jianwei Wang Wenqiang Liao ting Liang hong Dai Department of Urban and Rural Planning School of ArchitectureChang'an UniversityXi'an 710064China Institute of Tourism Planning and Design Chang'an UniversityXi'an 710064China Department of Data Management and Application College of Transportation EngineeringChang'an UniversityXi'an 710064China The Sixth Division China Construction&Development Co.Ltd.Tianjin 300451China School of Geological Engineering and Geomatics Chang'an UniversityXi'an 710064China

Self-driving and recreational vehicle(RV)camps are a new form of industry module with the integration of transportation and tourism in China,thus the scientific and reasonable site selection plays an important role in the success of camps’construction and *** terms of relying resources and development factors,camps can be divided into five categories:scenic-spot-based,transportation-based,environment-based,project-based and leisure and *** to whether it is of excludability and competitiveness,the camps in China mainly embody the attribute of private *** on the combination of subjective evaluation and objective calculation,the evaluation model of spatial site selection is constructed and the weight of each index is calculated by using analytic hierarchy process(AHP)method and entropy coefficient *** results show that traffic condition factor is the priority to the selection of campsite,and whether it is on the popular main self-driving route and the grade of trunk roads are the dominant *** second factor taken into consideration is the social factors,in which government policy supports and land cost play a key *** third factor is the market,in which the urban economic level,partnership with the government and tourist resource conditionsare of great *** fourth factor of the campsite selection includes natural elements,in which the quality of ecological environment and water source conditions are mostly *** the future,it is suggested that a camp pattern of"public goods"plus"private goods"should be built and the construction of camps in underdeveloped areas should be highly developed so as to form camp spatial network from individual points to a series of campsite and finally the campsite group in China will be set up.

关键词： Self-driving RV camp Product attribute Site selection Evaluation model AHP Entropy

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Composite Quantile Estimation in Partial Functional Linear Regression Model Based on Polynomial Spline

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Acta Mathematica Sinica,English Series 2021年第10期37卷 1627-1644页

作者： Ping YU ting LI Zhong Yi ZHU Jian hong SHI School of Mathematics and Computer Science Shanxi Normal UniversityLinfen 041000P.R.China School of Statistics and Management Shanghai University of Finance and EconomicsShanghai 200433P.R.China Department of Statistics Fudan UniversityShanghai 200433P.R.China

In this paper,we consider composite quantile regression for partial functional linear regression model with polynomial spline *** some mild conditions,the convergence rates of the estimators and mean squared prediction error,and asymptotic normality of parameter vector are *** studies demonstrate that the proposed new estimation method is robust and works much better than the least-squares based method when there are outliers in the dataset or the random error follows heavy-tailed ***,we apply the proposed methodology to a spectroscopic data sets to illustrate its usefulness in practice.

关键词： Asymptotic normality composite quantile regression functional data analysis polynomial spline rates of convergence

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Regularity of Global Attractor for Atmospheric Circulation Equations with Humidity Effect

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Acta Mathematicae Applicatae Sinica 2019年第4期35卷 820-829页

作者： Jiao-jiao PAN Qian JIANG ting-wei RUAN hong LUO School of Mathematical Sciences Sichuan Normal University

In this article, regularity of the global attractor for atmospheric circulation equations with humidity effect is considered. It is proved that atmospheric circulation equations with humidity effect possess a global attractor in H^k(?, R^4) for any k≥0, which attracts any bounded set of H^k(Ω, R^4) in the H^k-norm. The result is established by means of an iteration technique and regularity estimates for the linear semigroup of operator, together with a classical existence theorem of global attractor.

关键词： global attractor regularity atmospheric circulation equations humidity effect

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Recyclable High-performance Carbon Fiber Reinforced Epoxy Composites Based on Dithioacetal Covalent Adaptive Network

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Chinese Journal of Polymer Science 2024年第10期42卷 1514-1524,I0011页

作者： Gui-Lian Shi ting-Cheng Li Dao-hong Zhang Jun-Heng Zhang Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education&Hubei Key Laboratory of Catalysis and Materials Science Hubei R&D Center of Hyperbranched Polymers Synthesis and ApplicationsSouth-Central Minzu UniversityWuhan430074China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan430200China Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei UniversityWuhan430062Chin

Recycling of carbon fiber reinforced composites is important for sustainable development and the circular *** the use of dynamic chemistry,developing high-strength recyclable CFRPs remains a major challenge due to the mutual exclusivity between the dynamic and mechanical properties of ***,we developed a high-strength recyclable epoxy resin(HREP)based on dynamic dithioacetal covalent adaptive network using diglycidyl ether bisphenol A(DGEBA),pentaerythritol tetra(3-mercapto-propionate)(PETMP),and vanillin epoxy resin(VEPR).At high temperatures,the exchange reaction of thermally activated dithioacetals accelerated the rearrangement of the network,giving it significant reprocessing ***,HREP exhibited excellent solvent resistance due to the increased cross-linking *** this high-strength recyclable epoxy resin as the matrix and carbon fiber modified with hyperbranched ionic liquids(HBP-AMIM+PF6-)as the reinforcing agent,high performance CFRPs were successfully *** tensile strength,interfacial shear strength(IFSS)and interlaminar shear strength(ILSS)of the optimized formulation(HREP20/CF-HBPPF6)were 1016.1,70.8 and 76.0 MPa,*** addition,the CFRPs demonstrated excellent solvent and acid/*** CFRPs could completely degrade within 24 h in DMSO at 140℃,and the recycled CF still maintained the same tensile strength and ILSS as the original after multiple degradation cycles.

关键词： Epoxy resin Hyperbranched ionic liquid Recycling Carbon fiber Composites

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Gas drainage efficiency improvement by increasing coalbed permeability using waterjet cutting system

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Journal of Coal Science & Engineering(China) 2010年第2期16卷 150-156页

作者： LU ting-kan ZHOU ting-yang YU hong School of Energy Science and Engineering Henan Polytechnic University Jiaozuo 454000 China Rujigou Colliery Shenhua Ningxia Coal Group Shizuishan 750000 China Jiaozuo Coal Industry Group Co. Ltd. Henan Coal and Chemical Industry Group Co. Ltd. Jiaozuo 454000 China

This paper presented a method to create artificial fractures along the existing gas drainage borehole and increase the permeability of the coalbed using a high pressure waterjet cutting *** field work conducted in Rujigou Colliery, Shenhua Ningxia Coal Group demonstrate that the coalbed permeability is increased, and accordingly, gas drainage efficiency is improved up to 3 to 6 times over the traditional methods using high pressure waterjet ***, based on the monitoring data, the conceptual model for gas drainage process associated with different mining activities has been proposed, and few major advantages using waterjet assistance method have been identified.

关键词： permeability coalbed gas drainage waterjet Iongwalling

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Fabrication of mesoporous lignin-based biosorbent from rice straw and its application for heavy-metal-ion removal

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Journal of Environmental Sciences 2017年第3期29卷 132-140页

作者： Fang Xu ting-ting Zhu qing-quan Rao Sheng-Wen Shui Wen-Wei Li hong-Bo He Ri-Sheng Yao School of Medical Engineering Hefei University of TechnologyHefei 230009China CAS Key Laboratory of Urban Pollutant Conuersion Department of ChemistryUniversity of Science&Technology of ChinaHefei 230026China Environmental Monitoring Center of Taizhou Taizhou 31800China

Lignocellulosic biomass offers the most abundant renewable resource in replacing traditional fossil resources. However, it is still a major challenge to directly convert the lignin component into value-added materials. The availability of plentiful hydroxyl groups in lignin macromolecules and its unique three-dimensional structure make it an ideal precursor for mesoporous biosorbents. In this work, we reported an environmentally friendly and economically feasible method for the fabrication of mesoporous lignin-based biosorbent （MLBB） from lignocellulosic biomass through a SOB micro-thermal-explosion process, as a byproduct of microcrystalline cellulose. BET analysis reveal the average pore-size distribution of 5.50 nm, the average pore value of 0.35 cm3/g, and the specific surface area of 186 m2/g. The physicochemical properties of MLBB were studied by fourier transform infrared spectroscopy （FTIR）, attenuated-total-reflection fourier transform infrared spectroscopy （ATR-FTIR）, X-ray photoelectron spectroscopy （XPS）, and element analysis. These results showed that there are large amounts of sutfonic functional groups existing on the surface of this biosorbent. Pb（II） was used as a model heavy-metal-ion to demonstrate the technical feasibility for heavy-metal-ion removal. Considering that lignocellulosic biomass is a naturally abundant and renewable resource and SO3 micro-thermal-explosion is a proven technique, this biosorbent can be easily produced at large scale and become a sustainable and reliable resource for wastewater treatment.

关键词： Lignocellulosic biomassMesoporous biosorbentRice strawLigninSulfur trioxideMicro-thermal-explosion

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