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Synchronous organic-inorganic co-intercalated ammonium vanadate cathode for advanced aqueous zinc-ion batteries

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Journal of Energy Chemistry 2024年第7期94卷 608-617页

作者： Wenpei Kang bingchen zhang Zhurui Wang Zhengchunyu zhang Mang Niu Xuguang An Zhenkai Mou Xiaoyu Fan Xuqiang Hu Baojuan Xi Shenglin Xiong School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100ShandongChina State Key Laboratory of Bio-fibers and Eco-textiles Institute of Biochemical Engineering College of Materials Science and EngineeringQingdao UniversityQingdao 266071ShandongChina School of Mechanical Engineering Chengdu UniversityChengdu 610106SichuanChina Received 1 February 2024Revised 1 March

Vanadium-based cathode materials are attractive for aqueous zinc-ion batteries(AZIBs)owing to the high capacity from their open frameworks and multiple ***,the cycle stability and rate capability are still restricted by the low electrical conductivity and trapped diffusion ***,we propose an organic-inorganic co-intercalation strategy to regulate the structure of ammonium vanadate(NH_(4)V_(4)O_(10),NVO).The introduction of Al^(3+)and polyaniline(PANI)induces the optimized layered structure and generation of urchin-like hierarchical construction(AP-NVO),based on heterogeneous nucleation and dissolution-recrystallization growth *** to these favorable features,the AP-NVO electrode delivers a desirable discharge capacity of 386 mA h g^(-1) at 1.0 A g^(-1),high-rate capability of 263 mA h g^(-1 )at 5.0 A g^(-1) and excellent cycling stability with 80.4%capacity retention over 2000 cycles at 5.0 A g^(-1).Such satisfactory electrochemical performance is believed to result from the enhanced reaction kinetics provided by the stable layered structure and a high intercalation pseudo-capacitance *** results could provide enlightening insights into the design of layered vanadium oxide cathodematerials.

关键词： Ammonium vanadate bronze Co-pre-intercalation Urchin-like hierarchical structure Aqueous zinc-ion batteries

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求解大规模优化问题的改进海洋捕食者算法

运筹与管理 2024年第6期33卷 14-21页

作者：张文宇袁永斌高雪张炳晨西安邮电大学经济与管理学院陕西西安710061 中国航天系统科学与工程研究院北京100854

针对海洋捕食者算法(Marine Predators Algorithm,MPA)在求解大规模问题时存在解精度低和易陷入局部最优的缺点,提出了一种改进的海洋捕食者算法(Improved Marine Predators Algorithm,IMPA)。采用Lloyd’s算法初始化种群使种群个体分... 详细信息

针对海洋捕食者算法(Marine Predators Algorithm,MPA)在求解大规模问题时存在解精度低和易陷入局部最优的缺点,提出了一种改进的海洋捕食者算法(Improved Marine Predators Algorithm,IMPA)。采用Lloyd’s算法初始化种群使种群个体分布均匀;基于Q-learning算法自适应选择更新策略来平衡算法的探索和开发能力;通过反向学习机制提高种群多样性避免陷入局部最优。选取13个大规模(100维,500维和1000维)标准测试函数进行仿真实验,结果表明,IMPA算法在求解精度和收敛速度上优于其它对比算法。

关键词：海洋捕食者算法 Lloyd’s算法 Q-learning机制反向学习

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黄河流域高质量发展背景下河南省郑州市地质旅游资源利用新思路

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现代地质 2024年第2期38卷 533-546页

作者：石晨霞高永利吕国娟张睿章秉辰河南省地质研究院河南郑州450001 河南省地质研究院地学科普基地河南郑州450001 河南省地质科学研究所有限公司河南郑州450001 河南省第四地质勘查院有限公司河南郑州450001

文旅融合发展是旅游业高质量发展的主题,地质如何助力旅游业发展是长期以来地学界研究的方向。地质旅游资源作为旅游资源的一种重要类型,在郑州市乃至我国大部分地区都是以碎片化的方式进行利用,因缺少系统性和文化内涵而难以发挥其重... 详细信息

文旅融合发展是旅游业高质量发展的主题,地质如何助力旅游业发展是长期以来地学界研究的方向。地质旅游资源作为旅游资源的一种重要类型,在郑州市乃至我国大部分地区都是以碎片化的方式进行利用,因缺少系统性和文化内涵而难以发挥其重要价值。河南省郑州市地质旅游与地质文化资源专项调查成果证实,地质多样性是决定地质旅游资源多样性的关键因素;在传统的“地质+”利用模式下,地质学较强的专业性是其不易于被普通大众接受的主要因素,也是我国地质旅游发展遭遇的瓶颈。黄河流域高质量发展战略的实施为地质旅游资源的利用提供了新机遇。基于地质多样性理论,提出以“+地质”为基础的“地质基因注入法”,为地质旅游资源利用开辟了新思路:(1)通过自然、文化和地质的融合研究,整合郑州市地质旅游资源,构建“三区块七板块”的地质旅游新格局;(2)以地质多样性为魂,形成以“+地质”为主线的黄河科学故事体系;(3)让地质旅游资源在讲好科学与历史文化故事中既要做好主角,更要做好配角,让地质背景与古环境故事成为多样化资源开发保护与高质量利用的奠基石和助力器。研究成果为郑州市地质基因助力旅游业高质量发展提供科学依据,对其他地区地质资源对旅游业的促进也具有一定的参考价值。

关键词：黄河流域高质量发展郑州市地质旅游资源利用新思路

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Structural adaptive and optimal speckle filtering in multilook full polarimetric SAR images

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Journal of Systems Engineering and Electronics 2007年第2期18卷 217-222页

作者： Sun Nan zhang bingchen Wang Yanfei Graduate School Chinese Academy of Sciences Beijing 100039 P. R. China Inst. of Electronics Chinese Academy of Sciences Beijing 100080 P. R. China (Received December 2 2005

A novel approach is proposed for speckle reduction in multilook full polarimetric SAR images. In contrast to others, this approach adopts an enhanced structure detection method to estimate the parameters of the polarimetric covariance matrix for the multilook polarimetric whitening filtering （MPWF） algorithm and thus a structural adaptive and optimal speckle filter is developed. To evaluate the present approach, NASA SIR-C/X- SAR, L band, four-look processed polarimetric SAR data of the Tian-Mountain Forest is used for simulation. Experimental results demonstrate the effectiveness of this novel filtering algorithm in case of both speckle reduction and preservation of texture information. Comparisons with other methods are also made.

关键词： MPWF Geometrical-ratio detectors ESDMPWF Speckle Multilook polarimetric SAR.

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Baseline distribution optimization and missing data completion in wavelet-based CS-Tomo SAR

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Science China(Information Sciences) 2018年第4期61卷 164-172页

作者： Hui BI Jianguo LIU bingchen zhang Wen HONG Science and Technology on Microwave Imaging Laboratory Institute of ElectronicsChinese Academy of Sciences University of Chinese Academy of Sciences Department of Earth Science and Engineering Imperial College London

In this paper, we propose a coherence of measurement matrix-based baseline distribution optimization criterion, together with an L1 regularization missing data completion method for unobserved baselines(not belonging to the actual baseline distribution), to facilitate wavelet-based compressive sensingtomographic synthetic aperture radar imaging(CS-Tomo SAR) in forested areas. Using M actual baselines,we first estimate the optimal baseline distribution with N baselines(N > M), including N-M unobserved baselines, via the proposed coherence criterion. We then use the geometric relationship between the actual and unobserved baseline distributions to reconstruct the transformation matrix by solving an L1 regularization problem, and calculate the unobserved baseline data using the measurements of actual baselines and the estimated transformation matrix. Finally, we exploit the wavelet-based CS technique to reconstruct the elevation via the completed data of N baselines. Compared to results obtained using only the data of actual baselines, the recovered image based on the dataset obtained by our proposed method shows higher elevation recovery accuracy and better super-resolution ability. Experimental results based on simulated and real data validated the effectiveness of the proposed method.

关键词： tomographic synthetic aperture radar imaging(Tomo SAR) compressive sensing(CS) baseline distribution optimization coherence of measurement matrix

Structure and oxygen-defect regulation of hydrated vanadium oxide for enhanced zinc ion storage via interlayer doping strategy

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Nano Research 2023年第5期16卷 6094-6103页

作者： bingchen zhang Xihao Han Wenpei Kang Daofeng Sun School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580China

Hydrated vanadium oxide(VOH)is a promising cathode candidate for the aqueous zinc-ion batteries(AZIBs),due to the large interlayer spacing and high ***,severe pulverization and structure collapse upon cycling limit its practical ***,preintercalation strategy with higher positive charge of Cr^(3+) is proposed to regulate the structure and oxygen defect of the VOH-O_(d).The VOH-O_(d) with moderated amount of Cr^(3+) incorporation(M-CrVOH-O_(d)),showing a flower-like hierarchical structure assembled with thin nanosheets,can expand the interlayer spacing and increase the oxygen defect,inducing an enhanced high-rate cycling *** a result,M-CrVOH-O_(d) delivers a high capacity of 405 mAh·g^(−1)at 0.5 A·g^(−1),high capacity retention of 120%over 3,500 cycles,as well as an extraordinary energy output(297.3 Wh·kg^(−1)at 355.9 W·kg^(−1)).The density functional theory(DFT)calculations can prove the enhanced reaction kinetics with narrower bandgap and lower Zn^(2+) adsorption energy after the ***,based on the ex-situ X-ray diffraction(XRD)analysis,synergistic intercalation of the Zn^(2+)/H^(+)into the interlayers of M-CrVOH-O_(d) can bring the high specific *** work could help us understand the enhanced performance of VOH from the point of the chemical reactions.

关键词： hydrated vanadium oxide preintercalation cathode aqueous zinc-ion batteries

A SAR imaging method based on generalized minimax-concave penalty

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Science China(Information Sciences) 2019年第2期62卷 233-239页

作者： Zhonghao WEI bingchen zhang Yirong WU University of Chinese Academy of Sciences Key Laboratory of Technology in Geospatial Information Processing and Application Systems Institute of Electronics Chinese Academy of Sciences Institute of Electronics Chinese Academy of Sciences

Dear editor,Sparse signal processing offers a framework for synthetic aperture radar （SAR） imaging [1, 2]. As an efficient tool in sparse signal processing, L1minimization is often used in the reconstruction of SAR images. When implemented in SAR imaging [3–5], L;minimization offers significant improvement in the properties by suppressing the sidelobes and clutter. However, L;minimization is known to be a biased estimator. The L;minimization based algorithms such as the iterative

关键词： SAR A SAR imaging method based on generalized minimax-concave penalty

Matrix completion-based distributed compressive sensing for polarimetric SAR tomography

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Science China(Information Sciences) 2015年第11期58卷 224-226页

作者： BI Hui zhang bingchen HONG Wen Science and Technology on Microwave Imaging Laboratory Institute of Electronics Chinese Academy of Sciences

Dear editor,Synthetic aperture radar tomography(Tomo SAR)exploits repeat-pass measurements with slightly different incidence angles to reconstruct the reflectivity function in the elevation direction[1].In Tomo SAR,th... 详细信息

关键词： SAR Matrix completion-based distributed compressive sensing for polarimetric SAR tomography Figure

System design and first airborne experiment of sparse microwave imaging radar: initial results

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Science China(Information Sciences) 2015年第6期58卷 95-104页

作者： zhang bingchen zhang Zhe JIANG ChengLong ZHAO Yao HONG Wen WU YiRong Science and Technology on Microwave Imaging Laboratory Chinese Academy of Sciences Institute of Electronics Chinese Academy of Sciences University of Chinese Academy of Sciences

In this paper, we mainly study the system design of sparse microwave imaging radar and report some of the preliminary results of airborne experiments performed with it. Sparse microwave imaging radar is a novel concept which introduces the sparse signal processing theory to microwave imaging replacing the conventional matched filtering processing method. With the exploitation of the sparse microwave imaging, the radar system could achieve better performance. As a newly developed concept, the two main types of applications of sparse microwave imaging are found in adopting the sparse signal processing theory to current radar systems, and in designing an optimized sparse microwave imaging system. Here we are trying the latter that mainly aims at lower PRF and wider swath. We first introduce the theories of sparse microwave imaging radar and its imaging algorithm. Then we discuss the system designing principles, including the sampling scheme, signal bandwidth,SNR and multi-channel mode. Based on the relationships of these parameters, we provide a design example of radar parameters. In the end, we exploit an airborne experiment using our designed radar system with jittered azimuth sampling strategy. Some preliminary analysis from the experiment result is also provided.

关键词： sparse microwave imaging synthetic aperture radar(SAR) compressive sensing displaced phase center antenna(DPCA) system design ai