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直接反射在线可视铁谱暗场显微成像特性分析

西安交通大学学报 2025年第2期59卷 189-200页

作者：李博袁勋尹智吴伟邵军马富银西安石油大学机械工程学院西安710065 西安交通大学机械工程学院西安710049

为评估直接反射在线可视铁谱(OLVF)暗场显微成像特性,提出了一种磨粒暗场显微成像模型。基于朗伯余弦和光后向散射理论建立了直接反射OLVF显微成像系统的反射光辐照度叠加模型,以实现磨粒暗场显微成像质量的定量评价;仿真计算互补金属... 详细信息

为评估直接反射在线可视铁谱(OLVF)暗场显微成像特性,提出了一种磨粒暗场显微成像模型。基于朗伯余弦和光后向散射理论建立了直接反射OLVF显微成像系统的反射光辐照度叠加模型,以实现磨粒暗场显微成像质量的定量评价;仿真计算互补金属氧化物半导体(CMOS)像面的反差透视比,分析了光学倍率、油液衰减系数和后向散射角变化对磨粒暗场显微成像清晰度的影响规律,确定了磨粒暗场显微成像的最优光学倍率为2.2和油液衰减系数大于2.0;明确CMOS像面的反差透视比在0.210~0.846范围内变化,直接反射OLVF可通过暗场显微成像获得较高清晰度的磨粒图像,其磨粒探测精度约为10μm。磨粒图像采集实验测试结果表明:直接反射OLVF暗场显微成像不仅能够从油液衰减系数大于2.28的原油、柴油机油中可靠捕获磨粒视觉信息,而且可从油液衰减系数小于2.0的液压油、齿轮油中获取磨粒谱片图像,解决了不同油液中金属磨粒探测问题,为在线监测采油装备磨损提供了可能性。

关键词：直接反射在线可视铁谱暗场显微成像反差透视比原油磨粒

Facile synthesis of hollow Ti_(3)AlC_(2)microrods in molten salts via Kirkendall effect

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Journal of Advanced Ceramics 2022年第9期11卷 1491-1497页

作者： Yi LIU Chuangye WANG wei LUO Liang BAI Yang XU Xiaodong HAO Jianfeng ZHU shouwu GUO School of materials Science and Engineering Shaanxi University of Science and TechnologyXi’an 710021China materials Institute of Atomic and Molecular Science Shaanxi University of Science and TechnologyXi’an 710021China Department of Electronic Engineering School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The microstructure and morphology of Ti_(3)AlC_(2)powders not only affect the preparation of Ti_(3)C_(2) MXene but also have a great influence on their potential applications,such as microwave absorbers,alloy additives,or catalytic ***,the synthesis of Ti_(3)AlC_(2)powders with desired microstructure and morphology remains a ***,hollow Ti_(3)AlC_(2)microrods were prepared for the first time in NaCl/KCl molten salts by using titanium,aluminum,and short carbon fibers as starting *** was found that the short carbon fibers not only performed as carbon source but also acted as sacrificial ***,it was revealed that TiC and Ti2AlC were initially formed on the surface of carbon *** subsequent reactions between the outer Ti,Al and the inner carbon were dominated by the Kirkendall effect which gave rise to the formation of a hollow *** on this mechanism,hollow Ti_(3)AlC_(2)microspheres and a series of hollow TiC,Ti_(2)AlC,and V_(2)AlC powders were also successfully *** work provides a facile route to synthesize hollow maX phases and may give enlightenment on preparing other hollow carbide powders via the Kirkendall effect in the molten salts.

关键词： Ti_(3)AlC_(2) molten salt synthesis(MSS) hollow structure Kirkendall effect

Electronic modulation towards MOFs as template derived CoP via engineered heteroatom defect for a highly effcient overall water splitting

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Journal of Energy Chemistry 2025年第2期101卷 598-607页

作者： Meijie Ding Zhiqiang wei Dexue Liu Wenhua Zhao Qiang Lu Zhiming Li Qingsong Yu Chenggong Lu Hua Yang State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology School of Science Lanzhou University of Technology

The reasonable design of material morphology and eco-friendly electrocatalysts are essential to highly efficient water *** is proposed that a promising strategy effectively regulates the electronic structure of the d-orbitals of CoP using cerium doping in this paper,thus significantly improving the intrinsic property and conductivity of CoP for water *** a result,the as-synthesize porous Ce-doped CoP micro-polyhedron composite derived from Ce-ZIF-67 as bifunctional electrocatalytic materials exhibits excellent electrocatalytic performance in both the oxygen evolution reaction（OER） and the hydrogen evolution reaction（HER）,overpotentials of about 152 mV for HER at 10 ma cm-2and about 352 mV for OER at 50 ma cm-2,and especially it shows outstanding long-term ***,an alkaline electrolyzer,using Ce0.04Co0.96P electrocatalyst as both the anode and cathode,delivers a cell voltage value of1.55 V at the current density of 10 ma *** calculation results of the density functional theory（DFT）demonstrate that the introduction of an appropriate amount of Ce into CoP can enhance the conductivity,and can induce the electronic modulation to regulate the selective adsorption of reaction intermediates on catalytic surface and the formation of O*intermediates（CoOOH）,which exhibits an excellent electrocatalytic *** study provides novel insights into the design of an extraordinary performance water-splitting of the multicomponent electrocatalysts.

关键词： Cerium Hydrogen evolution Oxygen evolution Phosphides Water splitting

Development and application of an intelligent thermal state monitoring system for sintering machine tails based on CNN-LSTM hybrid neural networks

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Journal of Iron and Steel Research International 2025年第1期32卷 52-63页

作者： Da-lin Xiong Xin-yu Zhang Zheng-wei Yu Xue-feng Zhang Hong-ming Long Liang-jun Chen Anhui Province Key Laboratory of Metallurgical Engineering&Resources Recycling Anhui University of TechnologyMa’anshan243002AnhuiChina School of Metallurgical Engineering Anhui University of TechnologyMa’anshan243032AnhuiChina School of Computer Science Anhui University of TechnologyMa’anshan243032AnhuiChina

Real-time prediction and precise control of sinter quality are pivotal for energy saving,cost reduction,quality improvement and efficiency enhancement in the ironmaking *** advance,the accuracy and comprehensiveness of sinter quality prediction,an intelligent flare monitoring system for sintering machine tails that combines hybrid neural networks integrating convolutional neural network with long short-term memory(CNN-LSTM)networks was *** system utilized a high-temperature thermal imager for image acquisition at the sintering machine tail and employed a zone-triggered method to accurately capture dynamic feature images under challenging conditions of high-temperature,high dust,and *** feature images were then segmented through a triple-iteration multi-thresholding approach based on the maximum between-class variance method to minimize detail loss during the segmentation *** the advantages of CNN and LSTM networks in capturing temporal and spatial information,a comprehensive model for sinter quality prediction was constructed,with inputs including the proportion of combustion layer,porosity rate,temperature distribution,and image features obtained from the convolutional neural network,and outputs comprising quality indicators such as underburning index,uniformity index,and FeO content of the *** accuracy is notably increased,achieving a 95.8%hit rate within an error margin of±*** the system is applied,the average qualified rate of FeO content increases from 87.24%to 89.99%,representing an improvement of 2.75%.The average monthly solid fuel consumption is reduced from 49.75 to 46.44 kg/t,leading to a 6.65%reduction and underscoring significant energy saving and cost reduction effects.

关键词： Sinter quality Convolutional neural network Long short-term memory Image segmentation FeO prediction

Observation of Superconducting Pair Density Modulation within Lattice Unit Cell

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CHINESE PHYSICS LETTERS 2025年第2期42卷 175-205页

作者： wei, Tianheng Liu, Yanzhao Ren, wei Liang, Zhen Wang, Ziqiang Wang, Jian Peking Univ Sch Phys Int Ctr Quantum Mat Beijing 100871 Peoples R China Quantum Sci Ctr Guangdong Hong Kong macao Greater Hong Kong 518045 Peoples R China Boston Coll Dept Phys Chestnut Hill MA 02167 USA Collaborat Innovat Ctr Quantum matter Beijing 100871 Peoples R China Hefei Natl Lab Hefei 230088 Peoples R China

In unconventional high-temperature (high-Tc) superconductors, the pair density wave state, an exotic superconducting order showing spatially periodic order parameter modulations with the period of several unit cells and translational symmetry breaking, has attracted broad attention. However, the superconducting pair density modulation (PDM) within a single unit cell has never been carefully investigated before. Here, using scanning tunneling microscopy/spectroscopy, we report the observation of PDM in monolayer high-Tc iron chalcogenide films epitaxially grown on SrTiO3(001). The superconductivity modulations are characterized by the superconducting gap size and the coherence peak sharpness. Further analysis shows that the local maxima and minima in the superconducting gap modulation are centered at the crystallographic locations of the chalcogen atoms, revealing the breaking of the glide-mirror symmetry of the chalcogen atoms in monolayer high-Tc iron chalcogenide films grown on SrTiO3(001). Our findings provide precise microscopic information on superconductivity within the lattice unit cell and may promote the understanding of unconventional high-Tc superconductivity.

关键词： Scanning tunneling microscopy

Frequency Distributions of Energy Deposition in a Low Energy Electron Track

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IMP & HIRFL Annual Report 1994年 179-180页

作者： Li Qiang wei zengquan ma shouwu Zhou Guaugming Dang Bingrong Han Guangwu Li Wenjian and Xie Hongmei

ＦｒｅｑｕｅｎｃｙＤｉｓｔｒｉｂｕｔｉｏｎｓｏｆＥｎｅｒｇｙＤｅｐｏｓｉｔｉｏｎｉｎａＬｏｗＥｎｅｒｇｙＥｌｅｃｔｒｏｎＴｒａｃｋ￥ＬｉＱｉａｎｇ；ＷｅｉＺｅｎｇｑｕａｎ；ＭａＳｈｏｕｗｕ；Ｚｈｏ... 详细信息

ＦｒｅｑｕｅｎｃｙＤｉｓｔｒｉｂｕｔｉｏｎｓｏｆＥｎｅｒｇｙＤｅｐｏｓｉｔｉｏｎｉｎａＬｏｗＥｎｅｒｇｙＥｌｅｃｔｒｏｎＴｒａｃｋ￥ＬｉＱｉａｎｇ；ＷｅｉＺｅｎｇｑｕａｎ；ＭａＳｈｏｕｗｕ；ＺｈｏｕＧｕａｕｇｍｉｎｇ；ＤａｎｇＢｉ...

关键词： Electron

Preparation and performance of highly-conductive dual-doped Li_(7)La_(3)Zr_(2)O_(12)solid electrolytes for thermal batteries

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Green Energy & Environment 2025年第2期10卷 399-409页

作者： wei Li Shu Zhang Xinya Bu Jing Luo Yi Zhang Mengyu Yan Ting Quan Yanli Zhu State Key Laboratory of Explosion Science and Safety Protection Beijing Institute of TechnologyBeijing100081China Xi'an North Qinghua Electromechanical Co. Ltd.Xi'an710025China Beijing Institute of Technology Chongqing Innovation Center Chongqing401120China

Garnet Li_(7)La_(3)Zr_(2)O_(12)(LLZO)electrolytes have been recognized as a promising candidate to replace liquid/molten-state electrolytes in battery applications due to their exceptional performance,particularly Ga-doped LLZO(LLZGO),which exhibits high ionic ***,the limited size of the Liþtransport bottleneck restricts its high-current discharging *** present study focuses on the synthesis of Ga^(3+)þand Ba^(2+)þco-doped LLZO(LLZGBO)and investigates the influence of doping contents on the morphology,crystal structure,Liþtransport bottleneck size,and ionic *** particular,Ga_(0.32)Ba_(0.15)exhibits the highest ionic conductivity(6.11E-2 S cm^(-1) at 550 C)in comparison with other compositions,which can be attributed to its higher-energy morphology,larger bottleneck and unique Liþtransport *** addition to Ba^(2+),Sr^(2+)þand Ca^(2+)have been co-doped with Ga3þinto LLZO,respectively,to study the effect of doping ion radius on crystal structures and the properties of *** characterization results demonstrate that the easier Liþtransport and higher ionic conductivity can be obtained when the electrolyte is doped with larger-radius *** a result,the assembled thermal battery with Ga_(0.32)Ba_(0.15)-LLZO electrolyte exhibits a remarkable voltage platform of 1.81 V and a high specific capacity of 455.65 ma h g^(-1) at an elevated temperature of 525℃.The discharge specific capacity of the thermal cell at 500 ma amounts to 63%of that at 100 ma,showcasing exceptional high-current discharging *** assembled as prototypes with fourteen single cells connected in series,the thermal batteries deliver an activation time of 38 ms and a discharge time of 32 s with the current density of 100 ma cm^(-2).These findings suggest that Ga,Ba co-doped LLZO solid-state electrolytes with high ionic conductivities holds great potential for high-capacity,quick-initiating and high-current discharging thermal batteries.

关键词： Element doping Thermal battery Solid electrolyte LLZO Ionic conductivity

以肥厚梗阻型心肌病为主要表现的法布雷病诊治1例

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中华内科杂志 2025年第2期64卷 157-161页

作者：刘耀琨施秋萍骆星谕马为北京大学第一医院心血管内科北京100034 北京大学第一医院心血管疾病研究所北京100034 北京大学第一医院心血管疾病研究所超声心动图中心实验室北京100034

左心室肥厚(LVH)是临床诊疗过程中常见的心脏表现,病因复杂多样,给临床医生带来不小的诊断困难。法布雷病是一种罕见的X连锁遗传溶酶体贮积症,是由于GLA基因突变导致α半乳糖苷酶(α-Gal A)活性降低或完全缺乏,造成代谢底物三己糖酰基... 详细信息

左心室肥厚(LVH)是临床诊疗过程中常见的心脏表现,病因复杂多样,给临床医生带来不小的诊断困难。法布雷病是一种罕见的X连锁遗传溶酶体贮积症,是由于GLA基因突变导致α半乳糖苷酶(α-Gal A)活性降低或完全缺乏,造成代谢底物三己糖酰基鞘脂醇(Gb-3)及其衍生物脱乙酰基Gb-3(lyso-Gb3)在多脏器贮积,引起多系统病变甚至危及生命。心脏常是法布雷病的受累器官之一,心脏受累是导致死亡的主要原因,其中有30%~60%的患者表现为LVH。但由于本病患病率极低,很容易被临床医生忽视,特别是在疾病早期,因诊断延迟最终往往导致不可逆的器官功能损害。近些年,尽管国内外已发布了多部法布雷病诊疗相关专家共识和指南,旨在提高对该病的认识,但在临床实践中临床医生对该病的认知以及对LVH病因的鉴别诊断思路仍有不足。因此,本文通过讲述1例以肥厚梗阻型心肌病为主要表现的法布雷病的诊治过程,来系统性阐述LVH的鉴别诊断思路,并进一步提高对法布雷病的诊治能力。

关键词：左心室肥厚肥厚梗阻型心肌病法布雷病病因诊断

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SERF原子耦合磁强计抽运光功率误差分析

工程科学学报 2025年第3期47卷 489-495页

作者：全家乐刘晔马龙岩范文峰全伟北京航空航天大学大科学装置研究院/零磁科学中心北京100191 杭州极弱磁场国家重大科技基础设施研究院杭州310051

基于无自旋交换弛豫(Spin exchange relaxation-free,SERF)的原子自旋耦合磁强计同时具有敏感角速率和抑制环境磁场扰动的能力,是一种很有前途的长期导航应用工具.抽运光功率误差从标度因数和零偏稳定性两个方面限制了SERF耦合磁强计的... 详细信息

基于无自旋交换弛豫(Spin exchange relaxation-free,SERF)的原子自旋耦合磁强计同时具有敏感角速率和抑制环境磁场扰动的能力,是一种很有前途的长期导航应用工具.抽运光功率误差从标度因数和零偏稳定性两个方面限制了SERF耦合磁强计的长期稳定性,目前针对SERF惯性测量的抽运光误差分析均为分析标度因数误差,缺乏对零偏稳定性的分析.为了分析抽运光功率对系统的零偏稳定性影响,本文基于泰勒展开,将K–Rb–^(21)Ne耦合磁强计动力学系统由非线性系统简化为线性时不变系统,并基于状态空间方法推导了抽运光功率频率响应模型,最后在SERF耦合磁强计上对该模型进行了实验验证.理论和实验结果表明,耦合磁强计的磁光非正交将在光功率传递函数中引入微分环节,导致在耦合磁强计工作带宽里,耦合磁强计的输出信号与抽运光功率近似成比例环节.本文为分析SERF耦合磁强计中抽运光功率波动引起的惯性测量误差提供了精确的模型,为后续进行抽运光功率抑制提供了理论支持.

关键词： SERF 耦合磁强计惯性测量频率响应光功率误差

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