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3D Mineral Prospectivity Mapping Based on Deep Metallogenic Prediction Theory:A Case Study of the Lala Copper Mine,Sichuan,China

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Journal of Earth Science 2021年第2期32卷 348-357页

作者： keyan Xiao Jie Xiang Mingjing Fan Yang Xu MNR Key Laboratory of Metallogeny and Mineral Resource Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China International Mining Research Center China Geological SurveyBeijing 100037China China Mining News China Geological SurveyBeijing 100037China Institute of Geological Survey China University of GeosciencesWuhan 430074China China University of Geosciences Beijing 100083China

With the decrease in surface and shallow ore deposits,mineral exploration has focused on deeply buried ore bodies,and large-scale metallogenic prediction presents new opportunities and *** paper adopts the predictive thinking method in this era of big data combined with specific research on the special exploration and exploitation of deep-earth *** basic theoretical models of large-scale deep mineralization prediction and evaluation are explored:mineral prediction geological model theory,multidisciplinary information correlation theory,mineral regional trend analysis theory,and mineral prediction geological differentiation *** main workflow of large-scale deep resource prediction in the digital and information age is summarized,including construction of ore prospecting models of metallogenic systems,multiscale 3 D geological modeling,and 3 D quantitative prediction of deep *** the Lala copper mine in Sichuan Province as an example,this paper carries out deep 3 D quantitative prediction of mineral resources and makes a positive contribution to the future prediction and evaluation of mineral resources.

关键词： deep mine resources prospectivity mapping 3D modeling quantitative evaluation Lala copper mine

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Reducing Packing Factor of Znln2S4 to Promote Photocatalytic Activity

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Chemical Research in Chinese Universities 2020年第6期36卷 1102-1107页

作者： HU keyan XU Zian LIU Yiting HUANG Fuqiang State Key Laboratory of High-performance Ceramics and Super Fine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050P.R.China School of Mechanical and Electrical Engineering Jingdezhen Ceramic InstituteJingdezhen 333403P.R.China Department of Materials Science and Engineering City University of Hong KongTat Chee AvenueKowloonHong Kong 999077P.R.China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062P.R.China Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871P.R.China

Due to the quite sluggish charge-carrier separation in semiconductor photocatalysts,the photocatalytic ac-tivity of these materials is still far inferior than ***,a novel approach to reducing the packing factor(PF)of Znln2S4 semiconductors to improve the charge-carrier separation is *** well-crystallized Zn1-xIn2S4-x(x=0,0.05,0.1)powders were productively prepared through solid-state *** structures were verified by the high-resolution transmission electron microscopy,powder X-ray diffraction,and X-ray photoelectron *** PE values of Zn1-xIn2S4-x(x=0,0.05,0.1)samples were calculated to be *** *** *** the PF for Zn1-xIn2S4-x with increasing x can promote the separation of photoexcited carriers,and this process was endorsed by their photoelectric response and photoluminescence emission *** Zn0.9In2S3.9 sample with a lower PF value presents roughly 21 times higher photocurrent density and four times higher photodegrading rate of methyl orange than those of pristine ZnIn2S4.

关键词： Charge-carrier separation Packing factor Zm-xIn2S4-r Solid state reaction Photocatalytic activity

Effects of calcium carbonate on preparation and mechanical properties of wood/plastic composite

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International Journal of Agricultural and Biological Engineering 2017年第1期10卷 184-190页

作者： Cai Hongzhen Yang keyan Yi Weiming School of Agricultural Engineering and Food Science Shandong University of TechnologyZibo 255091China Shandong Research Center of Engineering and Technology for Clean Energy Zibo 255091China

In order to reduce the cost and improve the performance of wood/plastic composite(WPC),the effects of additive amount of calcium carbonate on preparation and mechanical properties of high density polyethylene(HDPE)based WPC were *** results showed that the calcium carbonate can improve preparation and mechanical properties *** 20%calcium carbonate additive could effectively improve the melt fluidity of the composites and reduce the energy consumption in the *** calcium carbonate had a favorable toughening effect on polymer and was effectively filled in *** the best tensile,flexural and impact properties of WPC,the appropriate additive amounts of calcium carbonate were 25%,10%and 30%,*** additive amount for preparation of WPC should be based on the processing requirements and the demands for different working conditions.

关键词： wood/plastic composite calcium carbonate preparation mechanical property fluidity SEM

Electrospun Nanofibrous Materials for Wound Healing

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Advanced Fiber Materials 2020年第4期2卷 212-227页

作者： Yuping Dong Yuqi Zheng keyan Zhang Yueming Yao Lihuan wang Xiaoran Li Jianyong Yu Bin Ding State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of TextilesDonghua UniversityShanghai 201620China College of Materials Science and Engineering Donghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 200051China

Wound dressing materials which are capable of meeting the demands of accelerating wound closure and promoting wound healing process have being highly *** nanofibrous materials show great application potentials for wound healing owing to relatively large surface area,better mimicry of native extracellular matrix,adjustable waterproofness and breathability,and programmable drug delivery *** this review article,we begin with a discussion of wound healing process and current commercial wound dressing ***,we emphasize on electrospun nanofibrous materials for wound dressing,covering the efforts for controlling fiber alignment and morphology,constructing 3D scaffolds,developing waterproof-breathable membrane,governing drug delivery performance,and regulating stem cell ***,we finish with challenges and future prospects of electrospun nanofibrous materials for wound dressings.

关键词： Electrospun Wound dressings Waterproofness Breathability Drug delivery Stem cell therapy

Image attention transformer network for indoor 3D object detection

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Science China(Technological Sciences) 2024年第7期67卷 2176-2190页

作者： REN keyan YAN Tong HU ZhaoXin HAN HongGui ZHANG YunLu Faculty of Information Technology Beijing University of TechnologyBeijing 100124China

Point clouds and RGB images are both critical data for 3D object detection. While recent multi-modal methods combine them directly and show remarkable performances, they ignore the distinct forms of these two types of data. For mitigating the influence of this intrinsic difference on performance, we propose a novel but effective fusion model named LI-Attention model, which takes both RGB features and point cloud features into consideration and assigns a weight to each RGB feature by attention ***, based on the LI-Attention model, we propose a 3D object detection method called image attention transformer network(IAT-Net) specialized for indoor RGB-D scene. Compared with previous work on multi-modal detection, IAT-Net fuses elaborate RGB features from 2D detection results with point cloud features in attention mechanism, meanwhile generates and refines 3D detection results with transformer model. Extensive experiments demonstrate that our approach outperforms stateof-the-art performance on two widely used benchmarks of indoor 3D object detection, SUN RGB-D and NYU Depth V2, while ablation studies have been provided to analyze the effect of each module. And the source code for the proposed IAT-Net is publicly available at https://***/wisper181/IAT-Net.

关键词： 3D object detection transformer attention mechanism

An experiment-library least-squares method on on-line coal element contents analysis

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Science China(Physics,Mechanics & Astronomy) 2012年第11期55卷 2062-2069页

作者： wang HuiDong LU JingBin LU YuPing YANG Dong MA keyan YANG Kang LIU YuMin CHENG DaoWen College of Physics Jilin University Changchun 130012 China Shenzhen National-Power Equipment Ltd. Nanjing 210009 China School of Basic Sciences Changchun University of Technology Changchun 130012 China

A new experiment-library least-squares(experiment-LLs) method used in the neutron inelastic-scattering and thermal-capture analysis(NITA) technique for on-line coal analysis was developed,which has significantly decreased the non-linear radiation *** this method,sixty samples with preset elemental contents were made,from whose experimental spectra twenty single-element spectrum libraries corresponding to twenty kinds of coal were built using the least-squares *** spectrum of the unknown sample was analyzed based on these twenty libraries to estimate its element *** the initial estimated result,the procedure of developing library and analysis was iterated to build a new library with the closest element contents to the unknown *** the experiment-LLs method can reduce non-linear radiation *** experiment-LLs method was performed on an improved coal analysis system which was equipped with a long-life 14 MeV pulsed-neutron generator,a bulk BGO detector with a temperature controller,a moisture meter and coal-smoothing *** precisions of this system for ash content,water content,volatile content and calorific value have reached 1.0wt%,0.5wt%,1.0wt%,350 kJ/kg,respectively.

关键词： on-line coal analysis neutron activation analysis library least-squares

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MC尼龙重载承压地板井下巷道铺设工艺研究

能源与环保 2020年第12期42卷 141-145,161页

作者：王克燕刑天海曹磊靳惠深张云宁李振韩复员翟强陈晨泰安金岳工程材料机械有限公司山东泰安271000 兖州煤业股份有限公司山东济宁272000 兖州煤业股份有限公司济南煤炭科技研究院山东济南250000 泰安龙元地质勘探有限公司山东泰安271000

我国煤矿井下无轨运输混凝土路面铺设成本高,并且受开采应力、巷道底板地质条件等影响,其应用受到限制。重载车辆的频繁碾压极易使路面发生损坏,从而影响正常开采效率还带来高昂的维护费用。为解决这一问题,采用MC尼龙重载承压地板代替... 详细信息

我国煤矿井下无轨运输混凝土路面铺设成本高,并且受开采应力、巷道底板地质条件等影响,其应用受到限制。重载车辆的频繁碾压极易使路面发生损坏,从而影响正常开采效率还带来高昂的维护费用。为解决这一问题,采用MC尼龙重载承压地板代替传统混凝土铺设路面,进行了MC尼龙重载承压地板井下巷道铺设的工艺研究。通过对承压板井下铺设方案的制定、承压地板型式的研发、地板的整体连接及稳定性研发等,实现了高效的作业效率,更为安全、清洁的作业环境以及更低的成本,进而达到了“以塑代混凝土”的实际示范意义。该铺设工艺为井下无轨运输的采区路面、工作面搬家通道、临时路面以及其他应急路面、硐室地板的应用提供了良好的方案借鉴。

关键词： MC尼龙井下巷道承压板铺设工艺

Introducing sulfur vacancies and in-plane SnS_(2)/SnO_(2) heterojunction in SnS_(2) nanosheets to promote photocatalytic activity

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Chinese Chemical Letters 2020年第10期31卷 2809-2813页

作者： keyan Hu Chen Ming Yiting Liu Chong Zheng Shaoning Zhang Dong wang Wei Zhao Fuqiang Huang State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China School of Mechanical and Electrical Engineering Jingdezhen Ceramic InstituteJingdezhen 333403China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China Department of Chemistry and Biochemistry Northern Illinois UniversityDeKalbIllinois 60115United States Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Due to the relatively sluggish charge carrier separation in metal sulfides,the photocatalytic activity of them is still far lower than ***,sulfur vacancies and in-plane SnS_(2)/SnO_(2) heterojunction were successfully introduced into the SnS_(2) nanosheets through high energy *** defective structures were studied by the electron paramagnetic resonance,Raman spectra,X-ray photoelectron spectroscopy,and high-resolution transmission electron microscope *** sulfur vacancies and in-plane heterojunctions strongly accelerate the separation of photoexcited electron-hole pairs,as confirmed by the photo luminesce nce emission spectra and time-resolved photoluminescence decay *** introduction of sulfur vacancies and in-plane heterojunction in SnS_(2) nanosheets results in roughly six times higher photodegrading rate for methyl orange and four times higher photocatalytic reduction rate of Cr6+than those of pure SnS_(2) nanosheets.

关键词： Sulfur vacancies In-plane heterojunction SnS_(2)Nanosheets Ball-milling Charge carrier separation

Nickel(Ⅱ) removal from water using silica-based hybrid adsorbents:Fabrication and adsorption kinetics

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Chinese Journal of Chemical Engineering 2016年第10期24卷 1353-1359页

作者： Min Xu Junsheng Liu keyan Hu Congyong Xu Yaoyao Fang Key Laboratory of Membrane Materials and Processes Department of Chemical and Materials EngineeringHefei University

A series of novel silica-based hybrid adsorbents were prepared by the crosslinking reaction of N-[3- （trimethoxysilyl）propyl] ethylene diamine （TMSPEDA） with epichlorohydrin （ECH） via a sol-gel process. Fourier transform infrared （FTIR） spectra confirmed that the reaction occurred. TGA curves showed that the thermal stability of these hybrid adsorbents reached as high as 180 ℃. As a typical example, the adsorption performance of nickel（U） ions onto an adsorbent （the volume ratio of TMSPEDA and ECH was 4：1 ） was explored. It was found that the adsorption of nickel（Ⅱ） ions onto this adsorbent followed the Lagergren pseudo-second-order kinetic model. The investigation of the adsorption mechanism demonstrated that nickel（Ⅱ） adsorption was chiefly controlled by diffusion-chemisorption, suggesting that more diffusion processes were involved in the adsorption of nickel（Ⅱ） ions onto this type of adsorbents. Desorption experiment indicates that these hybrid adsorbents can be regenerated. These findings reveal that this type of silica-based hybrid adsorbent is promising in the separation and recovery of nickel（Ⅱ） ions from Ni-containing wastewater or contaminated water.

关键词： Hybrid adsorbent Nickel(Ⅱ)Kinetics Adsorption Adsorbent