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Journal of Earth Science 2025年

作者： Jiangxia Wang panpan xu Hui Qian Yongqi Zang Qiming Wang Zhiyuan Ma School of Water and Environment， Chang'an University Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education， Chang'an University Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources， Chang'an University

The Guanzhong Basin， located in Shaanxi Province， China， has abundant geothermal resources in its hinterland. Focusing on typical thermal reservoir structural units， namely the Xianli fault-step (XL) and Xi'an depression (XA)， this study reveals the genesis of geothermal water by combining hydrochemistry and environmental isotopes. The geothermal waters of XL uniformly correspond to the Na-Cl type with high contents of major ions， while the geothermal water of XA has complex hydrochemical types. The quartz geothermometer (with maximum steam loss) and Na-K-Ca geothermometer are recommended for XL and the quartz geothermometer (with no and maximum steam loss) and Na-K geothermometer for XA. Their temperature ranges are 99-159℃ and 93-146℃， respectively. The circulation depth of geofluids in XL and XA range from 2579 to 4766 m and from 2541 to 4330 m， with mean apparent ages of 21543 and 20345 yr B.P.， respectively. The geothermal water in XL originates from a mixture of sedimentary water and ancient infiltration water， and its formation mode was the vertical heat conduction with cooling process. In contrast， the geothermal water in XA originates from the dual process of cooling and mixing， with the process being dominated by ancient infiltration water and supplementation by modern infiltration water.

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初中英语“教—学—评”一体化模式研究

英语教师 2025年第1期 182-184页

作者：徐盼盼安徽省阜阳市南县玉泉中学安徽阜阳236300

分析开展“教—学—评”一体化的相关背景。简要介绍“教—学—评”一体化模式。结合教学实例,探索初中英语“教—学—评”一体化模式的应用策略,即评价学生基础,制订教学目标;围绕教学目标,设计多样活动;采用过程评价,优化教学细节;评... 详细信息

分析开展“教—学—评”一体化的相关背景。简要介绍“教—学—评”一体化模式。结合教学实例,探索初中英语“教—学—评”一体化模式的应用策略,即评价学生基础,制订教学目标;围绕教学目标,设计多样活动;采用过程评价,优化教学细节;评价学习成果,分层设计作业。认为在初中英语教学中应用“教—学—评”一体化模式,能提升学习效率和效果,有效培养学生的英语学科核心素养,并取得教学相长的效果,从而推动教学改革进程。

关键词：初中英语 “教—学—评”一体化英语学科核心素养

Comparison and assessment of NDVI time series for seasonal wetland classification

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International Journal of Digital Earth 2018年第11期11卷 1103-1131页

作者： panpan xu Zhenguo Niu Ping Tang State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijingPeople’s Republic of China University of Chinese Academy of Sciences BeijingPeople’s Republic of China

Satellite-based wetland mapping faces challenges due to the high spatial heterogeneity and dynamic characteristics of seasonal *** normalized difference vegetation index(NDVI)time series(NTS)shows great potential in land cover mapping and crop classification,the effectiveness of various NTS with different spatial and temporal resolution has not been evaluated for seasonal wetland *** address this issue,we conducted comparisons of those NTS,including the moderate-resolution imaging spectroradiometer(MODIS)NTS with 500 m resolution,NTS fused with MODIS and Landsat data(MOD_LC8-NTS),and HJ-1 NDVI compositions(HJ-1-NTS)with finer resolution,for wetland classification of Poyang *** showed the following:(1)the NTS with finer resolution was more effective in the classification of seasonal wetlands than that of the MODIS-NTS with 500-m resolution and(2)generally,the HJ-1-NTS performed better than that of the fused NTS,with an overall accuracy of 88.12%for HJ-1-NTS and 83.09%for the MOD_*** work should focus on the construction of satellite image time series oriented to highly dynamic characteristics of seasonal *** study will provide useful guidance for seasonal wetland classification,and benefit the improvements of spatiotemporal fusion models.

关键词： NDVI time series seasonal wetland Poyang Lake satellite image time series

Edge Bundling in Information Visualization

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Tsinghua Science and Technology 2013年第2期18卷 145-156页

作者： Hong Zhou panpan xu Xiaoru Yuan Huamin Qu Shenzhen University the Hong Kong University of Science and Technology Peking University

The edge, which can encode relational data in graphs and multidimensional data in parallel coordinates plots, is an important visual primitive for encoding data in information visualization research. However, when data become very large, visualizations often suffer from visual clutter as thousands of edges can easily overwhelm the display and obscure underlying patterns. Many edge-bundling techniques have been proposed to reduce visual clutter in visualizations. In this survey, we briefly introduce the visual-clutter problem in visualizations. Thereafter, we review the cost-based, geometry-based, and image-based edge-bundling methods for graphs, parallel coordinates, and flow maps. We then describe the various visualization applications that use edge-bundling techniques and discuss the evaluation studies concerning the effectiveness of edge-bundling methods. An edge-bundling taxonomy is proposed at the end of this survey.

关键词： edge bundling visual clutter graph visualization parallel coordinates flow maps

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MViewer： mobile phone spatiotemporal data viewer

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Frontiers of Computer Science 2014年第2期8卷 298-315页

作者： Jiansu PU Siyuan LIU panpan xu Huamin QU Lionel M. NI Department of Computer Science Hong Kong University of Science and Technology Hong Kong 999077 China iLab Heinz College Carnegie Mellon University Pittsburgh PA 15601 USA

Nowadays movement patterns and people＇s be- havioral models are needed for traffic engineers and city plan- ners. These observations could be used to reason about mobil- ity and its sustainability and to support decision makers with reliable information. The very same knowledge about human diaspora and behavior extracted from these data is also valu- able to the urban planner, so as to localize new services, orga- nize logistics systems and to detect changes as they occur in the movement behavior. Moreover, it is interesting to inves- tigate movement in places like a shopping area or a working district either for commercial purposes or for improving the service quality. These kinds of tracking data are made avail- able by wireless and mobile communication technologies. It is now possible to record and collect a large amount of mobile phone calls in a city. Technologies for object tracking have recently become affordable and reliable and hence we were able to collect mobile phone data from a city in China from January 1, 2008 to December 31, 2008. The large amount of phone call records from mobile operators can be considered as life mates and sensors of persons to inform how many peo- ple are present in any given area and how many are entering or leaving. Each phone call record usually contains the caller and callee IDs, date and time, and the base station where the phone calls are made. As mobile phones are widely used in our daily life, many human behaviors can be revealed by an- alyzing mobile phone data. Through mobile phones, we can learn the information about locations, communications be- tween mobile phone users during their daily *** this work, we propose a comprehensive visual analysissystem named as MViewer, Mobile phone spatiotemporal data Viewer, which is the first system to visualize and analyze the population＇s mobility patterns from millions of phone call records. Our system consists of three major components： 1） visual analysis of user groups in

关键词： visual analysis mobility pattern mobile phone

Ionic Liquid as a Precursor to Synthesize Nitrogen- and Sulfur-co-doped Carbon Dots for Detection of Copper（II） Ions

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Chemical Research in Chinese Universities 2015年第5期31卷 730-735页

作者： xu panpan WANG Chunfeng SUN Dong CHEN Yujuan ZHUO Kelei Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and Reactions Ministry of Education School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 P. R. China

A facile approach was reported for the synthesis of nitrogen- and sulfur-co-doped carbon dots（N/S-CDs） by the sulfuric acid carbonization of 1-butyl-3-methylimidazolium 2-amino-3-mercaptopropionic acid（L-cysteine） salt（[C4mim][Cys]） ionic liquid. The as-prepared N/S-CDs exhibited a good solubility, excitation-dependent emission behavior, and high resistance to photobleaching. Furthermore, the N/S-CDs were employed as a fluorescent probe for detecting Cu^2＋ in real water samples with satisfactory recovery.

关键词： Carbon dot Fluorescence Ionic liquid Cu^2+ co-Doping

Influence mechanism of boron segregation on the microstructure evolution and hot ductility of super austenitic stainless steel S32654

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Journal of Materials Science & Technology 2022年第17期112卷 184-194页

作者： Jiangtao Yu Shucai Zhang Huabing Li Zhouhua Jiang Hao Feng panpan xu Peide Han School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education) Shenyang 110819China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

Influence mechanism of B segregation on the microstructure evolution and hot ductility of S32654 at850-1250℃was systematically investigated through experimental research and theoretical *** results demonstrated that the segregation of B at grain boundary(GB)played different roles in the microstructure evolution and hot ductility at various *** 850℃,B segregation inhibited Mo segregation at the GB and enhanced the GB *** 900-950℃,B segregation restricted the diffusion and segregation of Mo to the GB,inhibiting the precipitation ofσ*** 1000-1050℃,B segregation accelerated the dislocation accumulation and limited the GB migration,promoting the nucleation and inhibiting the growth of DRX *** 1100-1150℃,B has little effect on the DRX due to sufficient energy supply by higher *** the above beneficial effects of B,the hot ductility of S32654 was improved to varying degrees at 850-1150℃.However,as the temperature increased to1200-1250℃,B segregation decreased the solidus temperature and enhanced the liquefaction cracking tendency,resulting in a deterioration of the hot ductility.

关键词： Super austenitic stainless steel Boron Hot ductility Grain boundary segregation Atom probe tomography

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A Facile One-Step Synthesis of TiOe/Graphene Composites for Photodegradation of Methyl Orange

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Nano Research 2011年第3期4卷 274-283页

作者： Haijiao Zhang panpan xu Guidong Du Zhiwen Chen Kokyo Oh Dengyu Pan Zheng Jiao Institute of Nanochemistry and Nanobiology School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Center for Environmental Science in Saitama 914 Kamitanadare Kazo Saitama Japan

TiO2/graphene composite photocatalysts have been prepared by a simple liquid phase deposition method using titanium tetrafluoride and electron beam （EB） irradiation-pretreated graphene as the raw materials. The products were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis. The effects of varying the synthesis parameters such as graphene content, concentration of titanium tetrafluoride solution and irradiation dose were investigated. It was found that the preparation conditions had a significant effect on the structure and properties of the final products. The irradiated graphene was covered with petal-like anatase TiO2 nanoparticles, which were more uniform and smaller in size than those in products synthesized without EB irradiation-pretreated graphene. The photocatalytic activities of the products were evaluated using the photocatalytic degradation of methyl orange as a probe reaction. The results showed that the products synthesized using EB irradiation-pretreated graphene exhibited higher photocatalytic activities than those using graphene without EB irradiation pretreatment.

关键词： TiO2/graphene composites electron beam (EB) irradiation photocatalytic degradation methyl orange

Enabling rechargeable Li-MnO_(2) batteries using ether electrolytes

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SmartMat 2023年第5期4卷 131-138页

作者： Dawei Xia Hongpeng Gao Mingqian Li John Holoubek Qizhang Yan Yijie Yin panpan xu Zheng Chen Department of NanoEngineering University of California San DiegoLa JollaCaliforniaUSA Program of Materials Science and Engineering University of California San DiegoLa JollaCaliforniaUSA Program of Chemical Engineering University of California San DiegoLa JollaCaliforniaUSA Sustainable Power and Energy Center University of California San DiegoLa JollaCaliforniaUSA

A low-carbon future demands more affordable batteries utilizing abundant elements with sustainable end-of-life battery *** the economic and environmental advantages of Li-MnO_(2)batteries,their applica-tion so far has been largely constrained to primary ***,we demonstrate that one of the major limiting factors preventing the stable cycling of Li-MnO_(2)batteries,Mn dissolution,can be effectively mitigated by employing a common ether electrolyte,1 mol/L lithium bis(trifluorometha-nesulfonyl)imide(LiTFSI)in 1,3-dioxane(DOL)/1,2-dimethoxyethane(DME).We discover that the suppression of this dissolution enables highly reversible cycling of the MnO_(2)cathode regardless of the synthesized phase and ***,we find that both the LiPF_(6)salt and carbonate solvents present in conventional electrolytes are responsible for previous cycling *** ether electrolyte,paired with MnO_(2)cathodes is able to demonstrate stable cycling performance at various rates,even at elevated temperature such as 60℃.Our discovery not only represents a defining step in Li-MnO_(2)batteries with extended life but provides design criteria of electrolytes for vast manganese-based cathodes in rechargeable batteries.

关键词： ether-based electrolytes Li-MnO batteries Mn deposition Mn dissolution reuse of primary batteries

Dual-Ion Co-Regulation System Enabling High-Performance Electrochemical Artificial Yarn Muscles with Energy-Free Catch States

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Nano-Micro Letters 2023年第10期15卷 15-27页

作者： Ming Ren Lizhong Dong Xiaobo Wang Yuxin Li Yueran Zhao Bo Cui Guang Yang Wei Li Xiaojie Yuan Tao Zhou panpan xu Xiaona Wang Jiangtao Di Qingwen Li Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials Division Suzhou Institute of Nano-Tech and Nano‑BionicsChinese Academy of SciencesSuzhou 215123People’s Republic of China School of Nano‑Technology and Nano‑Bionics University of Science and Technology of ChinaHefei 230026People’s Republic of China Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Jiangxi Institute of NanotechnologyNanchang 330200People’s Republic of China

Artificial yarn muscles show great potential in applications requiring low-energy consumption while maintaining high performance. However, conventional designs have been limited by weak ion-yarn muscle interactions and inefficient “rocking-chair” ion migration. To address these limitations, we present an electrochemical artificial yarn muscle design driven by a dual-ion co-regulation system. By utilizing two reaction channels, this system shortens ion migration pathways, leading to faster and more efficient actuation. During the charging/discharging process, PF_6~- ions react with carbon nanotube yarn, while Li~+ ions react with an Al foil. The intercalation reaction between PF_6~- and collapsed carbon nanotubes allows the yarn muscle to achieve an energy-free high-tension catch state. The dual-ion coordinated yarn muscles exhibit superior contractile stroke, maximum contractile rate, and maximum power densities, exceeding those of “rocking-chair” type ion migration yarn muscles. The dual-ion co-regulation system enhances the ion migration rate during actuation, resulting in improved performance. Moreover, the yarn muscles can withstand high levels of isometric stress, displaying a stress of 61 times that of skeletal muscles and 8 times that of “rocking-chair” type yarn muscles at higher frequencies. This technology holds significant potential for various applications, including prosthetics and robotics.

关键词： Artificial muscles Carbon nanotube yarns Electrochemical actuators Catch state Dual-ion co-regulation

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