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maUN:Memory-Augmented Deep Unfolding Network for Hyperspectral Image Reconstruction

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IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1139-1150页

作者： Qian Hu Jiayi ma Yuan Gao junjun Jiang Yixuan Yuan Electronic Information School Wuhan UniversityWuhan 430072China School of Computer Science and Technology Harbin Institute of TechnologyHarbin 150001China Department of Electronic Engineering Chinese University of Hong KongHong Kong 999077China

Spectral compressive imaging has emerged as a powerful technique to collect the 3D spectral information as 2D measurements.The algorithm for restoring the original 3D hyperspectral images(HSIs)from compressive measurements is pivotal in the imaging process.Early approaches painstakingly designed networks to directly map compressive measurements to HSIs,resulting in the lack of interpretability without exploiting the imaging priors.While some recent works have introduced the deep unfolding framework for explainable reconstruction,the performance of these methods is still limited by the weak information transmission between iterative stages.In this paper,we propose a Memory-Augmented deep Unfolding Network,termed maUN,for explainable and accurate HSI reconstruction.Specifically,maUN implements a novel CNN scheme to facilitate a better extrapolation step of the fast iterative shrinkage-thresholding algorithm,introducing an extra momentum incorporation step for each iteration to alleviate the information loss.Moreover,to exploit the high correlation of intermediate images from neighboring iterations,we customize a cross-stage transformer(CSFormer)as the deep denoiser to simultaneously capture self-similarity from both in-stage and cross-stage features,which is the first attempt to model the long-distance dependencies between iteration stages.Extensive experiments demonstrate that the proposed maUN is superior to other state-of-the-art methods both visually and metrically.Our code is publicly available at https://***/HuQ1an/maUN.

关键词： Deep folding iteration

Enhancing Green Ammonia Electrosynthesis Through Tuning Sn Vacancies in Sn‑Based MXene/ maX Hybrids

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Nano-Micro Letters 2024年第5期16卷 154-168页

作者： Xinyu Dai Zhen‑Yi Du Ying Sun Ping Chen Xiaoguang Duan junjun Zhang Hui Li Yang Fu Baohua Jia Lei Zhang Wenhui Fang Jieshan Qiu Tianyi ma Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced materials of Liaoning Province College of ChemistryInstitute of Clean Energy ChemistryLiaoning UniversityShenyang 110036People’s Republic of China State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of TechnologyTaiyuan 030024People’s Republic of China School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601People’s Republic of China School of Chemical Engineering The University of AdelaideAdelaideSA 5005Australia State Key Laboratory of High‑Efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021NingxiaPeople’s Republic of China School of Science RMIT UniversityMelbourneVIC 3000Australia Guangdong Provincial Key Laboratory of Advanced Energy Storage materials School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640People’s Republic of China College of Chemical Engineering State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Renewable energy driven N_(2) electroreduction with air as nitrogen source holds great promise for realizing scalable green ammonia production.However,relevant out-lab research is still in its infancy.Herein,a novel Sn-based MXene/maX hybrid with abundant Sn vacancies,Sn@Ti_(2)CTX/Ti_(2)SnC–V,was synthesized by controlled etching Sn@Ti_(2)SnC maX phase and demonstrated as an efficient electrocatalyst for electrocatalytic N2 reduction.Due to the synergistic effect of MXene/maX heterostructure,the existence of Sn vacancies and the highly dispersed Sn active sites,the obtained Sn@Ti2CTX/Ti_(2)SnC–V exhibits an optimal NH_(3) yield of 28.4μg h^(−1) mg_(cat)^(−1) with an excellent FE of 15.57% at−0.4 V versus reversible hydrogen electrode in 0.1 M Na_(2)SO_(4),as well as an ultra-long durability.Noticeably,this catalyst represents a satisfactory NH3 yield rate of 10.53μg h^(−1) mg^(−1) in the home-made simulation device,where commercial electrochemical photovoltaic cell was employed as power source,air and ultrapure water as feed stock.The as-proposed strategy represents great potential toward ammonia production in terms of financial cost according to the systematic technical economic analysis.This work is of significance for large-scale green ammonia production.

关键词： Green ammonia synthesis N2 electroreduction Renewable energy Sn MXene/maX hybrid

Self-derivation and reconstruction of silver nanoparticle reinforced cobalt-nickel bimetallic hydroxides through interface engineering for overall water splitting

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Journal of Energy Chemistry 2024年第3期90卷 590-599,I0013页

作者： Yan Li Jie Han Weiwei Bao junjun Zhang Taotao Ai mameng Yang Chunming Yang Pengfei Zhang National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology School of Materials Science and EngineeringShaanxi University of TechnologyHanzhong 723000ShaanxiChina State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry&Chemical EngineeringNingxia UniversityYinchuan 750021NingxiaChina College of Chemistry&Chemical Engineering Yan’an UniversityYan’an 716000ShaanxiChina School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Designing efficient and long-lasting non-metal electrocatalysts is an urgent task for addressing the issue of kinetic hysteresis in electrochemical oxidation reactions.The bimetallic hydroxides,catalyzing the oxygen evolution reaction(OER),have significant research potential because hydroxide reconstruction to generate an active phase is a remarkable advantage.Herein,the complete reconstruction of ultrathin CoNi(OH)_(2) nanosheets was achieved by embedding Ag nanoparticles into the hydroxide to induce a spontaneous redox reaction(SRR),forming heterojunction Ag@CoNi(OH)_(2) for bifunctional hydrolysis.Theoretical calculations and in situ Raman and ex situ characterizations revealed that the inductive effect of the Ag cation redistributed the charge to promote phase transformation to highly activate Ag-modified hydroxides.The Co-Ni dual sites in Co/NiOOH serve as novel active sites for optimizing the intermediates,thereby weakening the barrier formed by OOH^*.Ag@CoNi(OH)_(2) required a potential of 1.55 V to drive water splitting at a current density of 10 ma cm^(-2),with nearly 98.6% Faraday efficiency.Through ion induction and triggering of electron regulation in the OER via the synergistic action of the heterogeneous interface and surface reconstruction,this strategic design can overcome the limited capacity of bimetallic hydroxides and bridge the gap between the basic theory and industrialization of water decomposition.

关键词： Surface reconstruction Bimetallic hydroxides Ag nanoparticle Operando Raman Overall water splitting

Mechanism of ball milled activated carbon in improving the desalination performance of flow-and fixed-electrode in capacitive deionization desalination

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Frontiers of Environmental Science & Engineering 2023年第5期17卷 145-154页

作者： Ge Shen junjun ma Jianrui Niu Ruina Zhang Jing Zhang Xiaoju Wang Jie Liu Jiarong Gu Ruicheng Chen Xiqing Li Chun Liu College of Environmental Science and Engineering Hebei University of Science and TechnologyShijiazhuang 050018China Pollution Prevention Biotechnology Laboratory of Hebei Province Shijiazhuang 050018China

Capacitive deionization(CDI)is a novel electrochemical water-treatment technology.The electrode material is an important factor in determining the ion separation efficiency.Activated carbon(AC)is extensively used as an electrode material;however,there are still many deficiencies in commercial AC.We adopted a simple processing method,ball milling,to produce ball milled AC(BAC)to improve the physical and electrochemical properties of the original AC and desalination efficiency.The BAC was characterized in detail and used for membrane capacitive deionization(MCDI)and flow-electrode capacitive deionization(FCDI)electrode materials.After ball milling,the BAC obtained excellent pore structures and favorable surfaces for ion adsorption,which reduced electron transfer resistance and ion migration resistance in the electrodes.The optimal ball-milling time was 10 h.However,the improved effects of BAC as fixed electrodes and flow electrodes are different and the related mechanisms are discussed in detail.The average salt adsorption rates(ASAR)of FCDI and MCDI were improved by 134%and 17%,respectively,and the energy-normalized removal salt(ENRS)were enhanced by 21%and 53%,respectively.We believe that simple,low-cost,and environmentally friendly BAC has great potential for practical engineering applications of FCDI and MCDI.

关键词： Ball-milling Capacitive deionization Fixed electrode Flow electrode

三十而立, 三十而已——我国腹腔镜结直肠手术技术进阶

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中华胃肠外科杂志 2024年第1期27卷 41-46页

作者：郑民华马君俊赵轩上海交通大学医学院附属瑞金医院普通外科、上海微创外科临床医学中心上海200020

腹腔镜结直肠手术在我国开展30年, 在技术层面经历了"摸索和成型-优化和规范-至臻和再创新"的三阶梯高速发展。基于腹腔镜技术的加持和助力, 结直肠外科在亚微观解剖、手术的术式和理念以及器械设备等方面呈现了全方位突飞猛进的发展。... 详细信息

腹腔镜结直肠手术在我国开展30年, 在技术层面经历了"摸索和成型-优化和规范-至臻和再创新"的三阶梯高速发展。基于腹腔镜技术的加持和助力, 结直肠外科在亚微观解剖、手术的术式和理念以及器械设备等方面呈现了全方位突飞猛进的发展。如今, 腹腔镜结直肠手术技术和疗效已逐步触及"天花板", 面对当下尚存的痛点和未来发展的方向, 我们该何去何从?本文将总结过去30年的经验, 固化已有的成果, 以期指引未来的实践和前行的路线。

关键词：结直肠肿瘤腹腔镜技术

Advances in selective catalytic oxidation of ammonia (NH_(3)-SCO): A review of catalyst structure-activity relationship and design principles

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Chinese Chemical Letters 2024年第1期35卷 169-180页

作者： Zhao Li Chunxue Wang junjun Qiu Yixing ma Chi Wang Xin Sun Kai Li Ping Ning Fei Wang Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries Kunming 650500China Faculty of Chemical Engineering Kunming University of Science and TechnologyKunming 650500China

NH_(3) in ambient air directly leads to an increase in the aerosol content in the air. These substances lead to the formation of haze to various environmental problems after atmospheric circulation and diffusion. Controlling NH_(3) emissions caused by ammonia escaping from mobile and industrial sources can effectively reduce the NH_(3) content in ambient air. Among the various NH_(3) removal methods, the selective catalytic oxygen method (NH_(3)-SCO) is committed to oxidizing NH_(3) to environmentally harmless H_(2)O and N_(2);therefore, it is the most valuable and ideal ammonia removal method. In this review, the characteristics of loaded and core-shell catalysts in NH_(3)-SCO have been reviewed in the context of catalyst structure-activity relationships, and the H_(2)O resistance and SO2 resistance of the catalysts are discussed in the context of practical application conditions. Then the effects of the valence state of the active center, oxygen species on the catalyst surface, dispersion of the active center and acidic sites on the catalyst performance are discussed comprehensively. Finally, the shortcomings of the existing catalysts are summarized and the catalyst development is discussed based on the existing studies.

关键词： Ammonia Selective catalytic oxidation Active metals and supports Influence of gas composition Reaction mechanism Catalyst structure-activity relationship

人工智能在直肠癌外科精准化诊疗中的应用价值

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中华胃肠外科杂志 2024年第6期27卷 574-578页

作者：付占威蔡正昊马君俊上海交通大学医学院附属瑞金医院胃肠外科上海市微创外科临床医学中心上海

结直肠癌是最为常见的消化道恶性肿瘤, 我国结直肠癌的发病特点尤以中低位直肠癌居多。近年来, 随着计算机科学的进步, 人工智能技术迅猛发展, 并已经在医学领域取得了大量的应用成果。目前, 人工智能技术已经覆盖了直肠癌的早期筛查、... 详细信息

结直肠癌是最为常见的消化道恶性肿瘤, 我国结直肠癌的发病特点尤以中低位直肠癌居多。近年来, 随着计算机科学的进步, 人工智能技术迅猛发展, 并已经在医学领域取得了大量的应用成果。目前, 人工智能技术已经覆盖了直肠癌的早期筛查、个体化评估、辅助诊疗决策、精细化手术以及预后判断等各个阶段, 为直肠癌的精准化和个体化治疗提供了帮助。然而, 缺乏标准化、系统化、可推广化的人工智能模型仍是该领域面临的主要痛点。因此, 必须针对人工智能模型开展大型前瞻性临床研究, 以进一步证实其在直肠癌临床诊疗中的应用价值。

关键词：直肠肿瘤人工智能精准医学医学影像困难骨盆

考虑剪力滞和剪切变形效应的UHPC箱梁长期挠度分析

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铁道学报 2024年第1期46卷 172-182页

作者：马俊军蔺鹏臻刘应龙何志刚兰州交通大学土木工程学院甘肃兰州730070 兰州交通大学建筑与城市规划学院甘肃兰州730070

为准确计算UHPC箱梁在长期荷载作用下的挠度,基于剪切变形规律的截面翘曲位移函数,运用能量变分法建立考虑剪力滞、剪切变形效应以及UHPC收缩徐变效应的UHPC箱梁挠度计算控制微分方程,推导均布荷载和集中荷载作用下UHPC简支箱梁挠度计... 详细信息

为准确计算UHPC箱梁在长期荷载作用下的挠度,基于剪切变形规律的截面翘曲位移函数,运用能量变分法建立考虑剪力滞、剪切变形效应以及UHPC收缩徐变效应的UHPC箱梁挠度计算控制微分方程,推导均布荷载和集中荷载作用下UHPC简支箱梁挠度计算公式,并利用有限元模型计算结果对其正确性进行验证。通过数值算例分析不同效应、截面配筋以及材料特性对UHPC箱梁挠度计算的影响。结果表明:考虑剪切变形效应产生的挠度明显大于剪力滞效应;均布荷载和集中荷载作用下,仅考虑剪力滞和剪切效应后产生的简支梁跨中挠度相对于按初等梁理论计算的瞬时挠度分别增大了9.4%和10.9%,而同时考虑UHPC收缩徐变效应后分别增大了约1.5倍左右;截面配筋对箱梁挠度计算有一定的影响,两种荷载作用下,考虑配筋后计算得到的简支梁跨中瞬时和长期挠度分别是不考虑配筋时挠度的0.96倍和0.89倍;用UHPC材料代替普通混凝土材料可显著降低结构的短、长期挠度以及收缩徐变引起的挠度变化。提出的公式可为长期荷载作用下UHPC箱梁的挠度计算提供理论依据。

关键词：超高性能混凝土箱梁收缩徐变挠度简支梁

Penicillin fermentation residue biochar as a high-performance electrode for membrane capacitive deionization

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Frontiers of Environmental Science & Engineering 2023年第4期17卷 155-165页

作者： Jie Liu junjun ma Weizhang Zhong Jianrui Niu Zaixing Li Xiaoju Wang Ge Shen Chun Liu School of Environmental Science and Engineering Hebei University of Science and TechnologyShijiazhuang 050018China Pollution Prevention Biotechnology Laboratory of Hebei Province Shijiazhuang 050018China

Membrane capacitive deionization(MCDI)is an efficient desalination technology for brine.Penicillin fermentation residue biochar(PFRB)possesses a hierarchical porous and O/N-doped structure which could serve as a high-capacity desalination electrode in the MCDI system.Under optimal conditions(electrode weight,voltage,and concentration)and a carbonization temperature of 700℃,the maximum salt adsorption capacity of the electrode can reach 26.4 mg/g,which is higher than that of most carbon electrodes.Furthermore,the electrochemical properties of the PFRB electrode were characterized through cyclic voltammetry(CV)and electrochemical impedance spectroscopy(EIS)with a maximum specific capacitance of 212.18 F/g.Finally,biotoxicity tests have showed that PFRB was non-biotoxin against luminescent bacteria and the MCDI system with the PFRB electrode remained stable even after 27 adsorption–desorption cycles.This study provides a novel way to recycle penicillin residue and an electrode that can achieve excellent desalination.

关键词： Membrane capacitive deionization(MCDI) Penicillin fermentation residue biochar (PFRB) Hierarchical porous O/N-doped Desalination