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Study on the PTX Parameters and Fractal Characteristics of Ore-Forming Fluids in the East Ore Section of the Pulang Copper Deposit,Southwest China

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Journal of Earth Science 2021年第2期32卷 390-407页

作者： Qinglin Xia tongfei li li Kang Shuai Leng Xiaochen Wang School of Earth Resources China University of GeosciencesWuhan 430074China Research Center for Petrogenesis and Mineralization of Granitoid Rocks China Geological SurveyWuhan 430205China Wuhan Center of Geological Survey CGS Wuhan 430205China Economic and Information Bureau of liangshan Yi Autonomous Prefecture of Sichuan Province Xichang 615000China

In this paper,the east ore section of the Pulang porphyry copper deposit is selected as the research *** micro-thermometer and laser Raman spectroscopic technique are utilized to study the parameters of ore-forming fluids such as pressure,temperature,and *** the meantime,the fractal models,including the perimeter-area(P-A)model and number-size(N-S)model,are introduced to quantify the shape of fluid inclusions,and distinguish the stages of ore-forming fluids,*** results show that the types of fluid inclusions are diversified,namely two-phase liquid-rich type,two-phase vapor-rich type,three-phase CO2-rich type,three-phase halite-bearing type and pure liquid *** fluids of main mineralization stage are characterized by medium-high temperature(170.2–421.4°C),medium-high salinity(9.3 wt.%–33.3 wt.%),and low density(0.73–1.06 g/cm3).With the migration and evolution,the temperature,salinity,and pressure of ore-forming fluids gradually decrease,while the density of fluids *** liquid-phase compositions mainly include H2O,and the vapor-phase compositions consist of H2O,CH4,N2,and CO2,indicating the characteristics of reducing fluids and the mixing of atmospheric *** general,the characteristics of ore-forming fluids in the east ore section are similar to those of the first mining area,suggesting that the ore-forming fluids in the east ore section may not migrate from the first mining *** the east ore section may be a relatively independent metallogenic ***,the fractal analysis results demonstrate that the shape of fluid inclusions formed in the same hydrothermal activity features *** DAPvalues of fluid inclusions in B veins,ED veins,andD veins are 1.04,1.06 and 1.10,respectively,showing a gradually increasing trend from the main stage to the late stage of ***,the shape of fluid inclusions ranging from B veins to D veins becomes increasingly *** also reveals

关键词： perimeter-area model number-size model fluid inclusion fractal Pulang copper deposit

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Confinement of sulfur-doped NiO nanoparticles into N-doped carbon nanotube/nanofiber-coupled hierarchical branched superstructures:Electronic modulation by anion doping boosts oxygen evolution electrocatalysis

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Journal of Energy Chemistry 2021年第12期30卷 585-593,I0014页

作者： tongfei li Jingwen Yin Yu li Ziqi Tian Yiwei Zhang lin Xu Yanle li Yawen Tang Huan Pang Jun Yang School of Chemistry and Chemical Engineering Southeast UniversityJiangsu Optoelectronic Functional Materials and Engineering LaboratoryNanjing 211189JiangsuChina School of Chemistry and Materials Science Jiangsu Key Laboratory of New Power BatteriesNanjing Normal UniversityNanjing 210023JiangsuChina Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009JiangsuChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesNo.19A Yuquan RoadBeijing 100049China Nanjing IPE Institute of Green Manufacturing Industry Nanjing 211100JiangsuChina

The search for non-precious and efficient electrocatalysts towards the oxygen evolution reaction(OER)is of vital importance for the future advancement of multifarious renewable energy conversion/storage *** modulation via heteroatom doping is recognized as one of the most forceful leverages to enhance the electrocatalytic ***,we demonstrate a delicate strategy for the in-situ confinement of S-doped Ni O nanoparticles into N-doped carbon nanotube/nanofiber-coupled hierarchical branched superstructures(labeled as S-Ni O@N-C NT/NFs).The developed strategy simultaneously combines enhanced thermodynamics via electronic regulation with accelerated kinetics via *** S-doping into Ni O lattice and the 1 D/1 D-integrated hierarchical branched carbon substrate confer the resultant S-Ni O@N-C NT/NFs with regulated electronic configuration,enriched oxygen vacancies,convenient mass diffusion pathways and superior architectural ***,the SNi O@N-C NT/NFs display outstanding OER properties with an overpotential of 277 m V at 10 m A cm^(-2)and impressive long-term durability in KOH *** functional theory(DFT)calculations further corroborate that introducing S-dopant significantly enhances the interaction with key oxygenate intermediates and narrow the band *** encouragingly,a rechargeable Zn-air battery using an air-cathode of Pt/C+S-Ni O@N-C NT/NFs exhibits a lower charge voltage and preferable cycling stability in comparison with the commercial Pt/C+Ru O_(2)*** study highlighting the concurrent consideration of electronic regulation,architectural design and nanocarbon hybridization may shed light on the future exploration of economical and efficient electrocatalysts.

关键词： Electrospinning Heteroatom doping Hierarchical architecture Oxygen evolution reaction DFT calculations

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In situ establishment of Co/MoS_(2) heterostructures onto inverse opal‐structured N,S‐doped carbon hollow nanospheres:Interfacial and architectural dual engineering for efficient hydrogen evolution reaction

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SmartMat 2021年第4期2卷 591-602页

作者： Tingyu Lu tongfei li Desheng Shi Jialin Sun Huan Pang lin Xu Jun Yang Yawen Tang Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials ScienceNanjing Normal UniversityNanjingJiangsuChina 2 School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhouJiangsuChina Nanjing IPE Institute of Green Manufacturing Industry NanjingJiangsuChina State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijingChina

Rational design of low‐cost and high‐efficiency non‐precious metal‐based catalysts toward the hydrogen evolution reaction(HER)is of paramount significance for the sustainable development of the hydrogen *** manipulationinduced electronic modulation represents a sophisticated strategy to enhance the intrinsic activity of a non‐precious ***,we demonstrate the straightforward construction of Co/MoS_(2) hetero‐nanoparticles anchored on inverse opal‐structured N,S‐doped carbon hollow nanospheres with an ordered macroporous framework(denoted as Co/MoS_(2)@N,S-CHNSs hereafter)via a templateassisted *** experimental evidence and theoretical calculations reveal that the formation of Co/MoS_(2) heterojunctions can effectively modulate the electronic configuration of active sites and optimize the reaction pathways,remarkably boosting the intrinsic ***,the inverse opal‐structured carbon substrate with an ordered porous framework is favorable to enlarge the accessible surface area and provide multidimensional mass transport channels,dramatically expediting the reaction *** to the compositional synergy and structural superiority,the fabricated Co/MoS_(2)@N,S-CHNSs exhibit excellent HER activity with a low overpotential of 105mV to afford a current density of 10 mA/cm^(2).The rationale of interface manipulation and architectural design herein is anticipated to be inspirable for the future development of efficient and earth‐abundant electrocatalysts for a variety of energy conversion systems.

关键词： heterostructures hydrogen evolution reaction inversed opal structure MoS_(2)

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Geodynamic simulation of the Pulang porphyry deposit， Southwest China: Implication for ore genesis and exploration

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Journal of Earth Science 2022年

作者： Shuai Leng Qinglin Xia tongfei li Xiaocheng Wang Mengyu Zhao Feng Zhang School of Earth Resources， China University of Geosciences Collaborative Innovation Center for Exploration of Strategic Mineral Resources State Key Laboratory of Geological Processes and Mineral Resources， China University of Geosciences Wuhan Center of Geological Survey CGS

The giant Pulang porphyry copper deposit was discovered in the southern segment of the Yidun arc， one of the largest porphyry deposits in the southeastern Tibetan Plateau. The purpose of this study was to use numerical simulation to characterize mineralization process during the formation of Pulang. Combining field-determined geological features， mineralogy， and geochemistry， we established a simulation model interlinking 5 processes related to mineralization system， and revealed the presence of a temperature anomaly， and accurately reproduced/explained mineralization zones at Pulang. Combining modeling with chalcopyrite mineralization rates and average Cu grades， we estimate the duration of the Pulang deposit formed over a period of 0.99-1.22 million years. Compared with previous geochronology， Modeling-linked approaches can be used to provide insight into controls on the formation of Pulang， and guide mineral exploration.

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Modeling of random wave transformation with strong wave-induced coastal currents

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Water Science and Engineering 2008年第1期1卷 18-26页

作者： Zheng Jinhai H. Mase li tongfei College of Ocean Hohai University Nanjing 210098 P. R. China Disaster Prevention Research Institute Kyoto University Uji Kyoto 611-0011 Japan

The propagation and transformation of multi-directional and uni-directional random waves over a coast with complicated bathymetric and geometric features are studied experimentally and numerically. Laboratory investigation indicates that wave energy convergence and divergence cause strong coastal currents to develop and inversely modify the wave fields. A coastal spectral wave model, based on the wave action balance equation with diffraction effect （WABED）, is used to simulate the transformation of random waves over the complicated bathymetry. The diffraction effect in the wave model is derived from a parabolic approximation of wave theory, and the mean energy dissipation rate per unit horizontal area due to wave breaking is parameterized by the bore-based formulation with a breaker index of 0.73. The numerically simulated wave field without considering coastal currents is different from that of experiments, whereas model results considering currents clearly reproduce the intensification of wave height in front of concave shorelines.

关键词： random wave coastal current spectral wave model numerical simulation

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A general strategy to the synthesis of carbon-supported PdM(M=Co,Fe and Ni)nanodendrites as high-performance electrocatalysts for formic acid oxidation

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Journal of Energy Chemistry 2017年第6期26卷 1238-1244页

作者： Yanrong Ma tongfei li Hao Chen Xiaojie Chen Sihui Deng lin Xu Dongmei Sun Yawen Tang Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Centre of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023JiangsuChina

Rational synthesis of a new class of electrocatalysts with high-performance and low-cost is of great significance for future fuel cell devices. Herein, we demonstrate a general one-step simultaneous reduction method to prepare carbon-supported Pd M（M = Co, Fe, Ni） alloyed nanodendrites with the assistance of oleylamine and octadecylene. The morphology, structure and composition of the obtained Pd M nanodendrites/C catalysts have been fully characterized. The combination of the dendritic structural feature and alloyed synergy offer higher atomic utilization efficiency, excellent catalytic activity and enhanced stability for the formic acid oxidation reaction（FAOR）. Strikingly, the as-synthesized Pd Co nanodendrites/C catalyst could afford a mass current density of 2467.7 A g, which is almost 3.53 and 10.4 times higher than those of lab-made Pd/C sample(698.3 A g) and commercial Pd/C catalyst(237.6 A g), respectively. Furthermore, the PdC o nanodendrites/C catalyst also exhibit superior stability relative to the Pd/C catalysts, make it a promising anodic electrocatalyst in practical fuel cells in the future. Additionally, the present feasible synthetic approach is anticipated to provide a versatile strategy toward the preparation of other metal alloy nanodendrites/carbon nanohybrids.

关键词： PdM alloy Nanodendrites Electrocatalysts Formic acid oxidation

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考虑非线性充电的纯电动公交充电计划优化

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华南理工大学学报（自然科学版） 2024年第9期52卷 115-130页

作者：熊杰赖可凡李同飞窦雪萍许琰北京工业大学交通工程北京市重点实验室北京100124 中国人民解放军92942部队北京100161

纯电动公交车以其低排放、低噪声等优点在公交系统中得到越来越广泛的应用。然而相对较短的车辆续航里程和较长的充电时间使其在运营中需要频繁充电,从而衍生出新的充电计划问题。合理的充电方案对于节省充电设施建设成本和缩减充电成... 详细信息

纯电动公交车以其低排放、低噪声等优点在公交系统中得到越来越广泛的应用。然而相对较短的车辆续航里程和较长的充电时间使其在运营中需要频繁充电,从而衍生出新的充电计划问题。合理的充电方案对于节省充电设施建设成本和缩减充电成本等方面均有重要意义。目前电动公交充电计划优化的研究通常将充电时长与充电量设定为线性关系,且较少考虑充电计划与充电桩作业流程的综合优化,导致充电场景还原性差和资源浪费等问题。为此,在给定车次安排的前提下进一步优化电动公交充电计划,构建了以最小化系统总成本为目标的混合整数规划模型,对充电事件的发生时段、充电开始与结束时间以及充电桩作业流程进行同步优化,且充分考虑了分时电价政策、不完全充电策略和电池的非线性充电特性。在问题求解方面,首先通过线性近似的方式将电池的非线性充电曲线改写为分段线性函数,进而利用商业求解器Gurobi得到最优方案;之后基于最小费用最大流理论与逆差函数设计了一套专门的优化算法;最后,以北京市5条公交线路为例设计多组实验,并分别应用Gurobi与本文设计的算法进行优化求解。优化结果验证了所提出算法的准确性与高效性,可使当前充电系统总成本降低28.34%~56.1%。

关键词：纯电动公交充电计划非线性充电特性优化算法

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考虑分时电价和多车型的电动公交行车计划优化

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交通运输系统工程与信息 2024年第4期24卷 188-199,211页

作者：熊杰梁晶晶李向楠窦雪萍李同飞北京工业大学北京市交通工程重点实验室北京100124 民航机场规划设计研究总院有限公司北京100101

为最小化电动公交系统的总运营成本,本文提出一种考虑分时电价和多车型的电动公交行车与充电计划的一体化优化模型。该模型同时考虑车次链构建、充电时间窗及充电桩数量等实际运营约束。通过设计自适应大邻域搜索算法(Adaptive Large Ne... 详细信息

为最小化电动公交系统的总运营成本,本文提出一种考虑分时电价和多车型的电动公交行车与充电计划的一体化优化模型。该模型同时考虑车次链构建、充电时间窗及充电桩数量等实际运营约束。通过设计自适应大邻域搜索算法(Adaptive Large Neighborhood Search, ALNS)求解车次链,该算法针对多车型下的车次与车型匹配和车次链可行性等问题特性多元化设计可行解的破坏与修复算子。对于ALNS迭代中生成的可行车次链组合,构建分时电价下的充电计划优化子问题,并将其转化到特定的网络图中,设计基于最小费用流的算法求解充电时长,优化决策充电开始时间。选取北京市的3条公交线路验证模型和算法,结果显示,相比于现状,车队规模从30辆减少至24辆,电费成本和运营总成本分别降低了25.84%和20.63%。通过对比实验,探讨不同修复指标权重和车型组合对优化结果的影响。

关键词：城市交通行车计划自适应大邻域搜索算法电动公交分时电价多车型

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一种基于线结构光的水下目标3维信息测量方法

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机器人 2022年第5期44卷 564-573页

作者：徐鹏飞孟昊李同飞郑金海李智刚河海大学江苏南京210024 中国科学院沈阳自动化研究所机器人学国家重点实验室辽宁沈阳110016

针对现有水下探测方式精度不佳、标定误差较大、效率较低等不足,设计了一种基于线结构光的水下目标3维信息测量方法。首先利用交比不变原理求解特征点在世界坐标系下的相对位置,随后基于像面特征点的方向向量及特征点的位置信息求解其... 详细信息

针对现有水下探测方式精度不佳、标定误差较大、效率较低等不足,设计了一种基于线结构光的水下目标3维信息测量方法。首先利用交比不变原理求解特征点在世界坐标系下的相对位置,随后基于像面特征点的方向向量及特征点的位置信息求解其在相机坐标下的真实坐标值,利用多个特征点完成结构光平面的标定。通过目标物扫描实验验证了该方法的可行性及有效性。线结构光平面的标定仅需要对特制的简单结构立体靶标进行一次扫描即可完成,无需多次移动靶标,避免了人为误差的影响。在标定线结构光平面的同时可以同步完成位移平台各自由度的位移速度标定,有效降低了实验平台系统误差,在提升系统精度的同时也极大地提升了整个系统标定过程的效率,非常适用于大尺度线结构光系统在水下现场标定。经验证,扫描水下目标物所得3维点云坐标沿X、Y轴方向的误差均小于2%,沿Z轴方向的误差略大,平均误差2.77%。

关键词：激光扫描仪水下探测成像系统标定线结构光

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5G无线通信工程建设管理特点研究

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无线互联科技 2022年第7期19卷 1-2页

作者：李童菲河南林业职业学院河南洛阳471002

当今社会,移动通信技术逐渐变成通信设备、互联网以及网络社交中不可缺少的重要设施。为了确保5G无线通信工程的实施效果,根据现实需求制定合理的建设方案,保证5G工程通信质量,文章主要针对5G无线通信关键技术特点和建设方案进行深入研... 详细信息

当今社会,移动通信技术逐渐变成通信设备、互联网以及网络社交中不可缺少的重要设施。为了确保5G无线通信工程的实施效果,根据现实需求制定合理的建设方案,保证5G工程通信质量,文章主要针对5G无线通信关键技术特点和建设方案进行深入研究,最终提出针对性的意见,希望通过这种方式促进5G工程技术建设质量的不断提升。

关键词： 5G通信技术工程建设特点研究

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