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Journal of Energy Chemistry 2025年第1期100卷 621-627页

作者： fei Lv Longjie Liu Jiazhe Wu Pengfei Wang Lixia Pan Dengwei Jing yubin chen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University

Combining water electrolysis and rechargeable battery technologies into a single system holds great promise for the co-production of hydrogen （H2） and ***,the design and development of such systems is still in its ***,an integrated hydrogen-oxygen （O2）-electricity co-production system featuring a bipolar membrane-assisted decoupled electrolyzer and a Na-Zn ion battery was established with sodium nickelhexacyanoferrate （NaNiHCF） and Zn2+/Zn as dual redox *** decoupled electrolyzer enables to produce H2and O2in different time and space with almost 100%Faradaic efficiency at 100 mA ***,the charged NaNiHCF and Zn electrodes after the electrolysis processes formed a Na-Zn ion battery,which can generate electricity with an average cell voltage of 1.75 V at 10 m A *** connecting Si photovoltaics with the modular electrochemical device,a well-matched solar driven system was built to convert the intermittent solar energy into hydrogen and electric energy with a solar to hydrogen-electricity efficiency of 16.7%,demonstrating the flexible storage and conversion of renewables.

关键词： Hydrogen Electricity Decoupled water electrolyzer Na-Zn ion battery Solar energy

Precise gradient separation of nanoparticles using reduced graphene oxide-polyoxomolybdate membranes

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Science China Chemistry 2025年第01期 209-216页

作者： yixin yang Wanlei Zhao Ruoxuan Zheng Hongqiang Li Wei chen yu-fei Song State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Quzhou Institute for Innovation in Resource Chemical Engineering

The purification and size sieving of nanoparticles （NPs） represents a significant scientific ***,the r GO-polyoxometalates (POMs=PMo12,Mo132and Mo368) membranes were fabricated successfully via a simple and scalable POMsassisted in-situ photoreduction *** the mass ratio of r GO to PMo12was 1:30,the resultant r GO-PMo12membranes with highly ordered and uniform nanochannels of 1.0 nm can be obtained,which showed an accurate carbon quantum dots（CQDs） separation with a cut-off size approximately 1.0 *** increase of the size of the interlayered POMs from PMo12（1.0 nm）,{Mo132}（2.9 nm） to{Mo368}（3.8 nm）,the resultant r GO-PMo12,r GO-Mo132and r GO-Mo368exhibited precise gradient separation of CQDs and Au nanoparticles by size exclusion *** results pave a promising way to construct new twodimensional （2D） membranes for highly efficient size-selective separation.

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FHL2 deficiency aggravates Candida albicans infection through decreased myelopoiesis

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Science China Life Sciences 2025年

作者： Rongmei Gao Kanchao chen yimin Wang Rongxia Guo Xiaoyu Zhang Peng Wu Weili Wang Qingxiang Huang Xuemei Xie Shangda yang yanling Lü Qian Ren fei Liu Song chen Fengxia Ma Tao cheng Hui cheng State Key Laboratory of Experimental Hematology National Clinical Research Center for Blood Diseases Haihe Laboratory of Cell Ecosystem Institute of Hematology & Blood Diseases Hospital Chinese Academy of Medical Sciences & Peking Union Medical College CAMS Center for Stem Cell Medicine PUMC Department of Stem Cell and Regenerative Medicine

Hematopoiesis is a finely tuned process that generates all blood cell types through self-renewal and differentiation, which is crucial for maintaining homeostasis. Acute infections can prompt a hematopoietic response known as emergency myelopoiesis. In this study, using a Candida albicans (C. albicans) infection model, we demonstrated for the first time that disruption of Fhl2 led to increased fungal burden,heightened inflammatory response and reduced survival rates. Impaired myeloid hematopoiesis and immune cell production were evident, as proved by the decreased numbers of hematopoietic stem and progenitor cells (HSPCs) and granulocytes in the bone marrow of Fhl2-deficient mice. In conclusion, FHL2 regulated emergency myelopoiesis in response to C. albicans, affecting the host’s defense against pathogens.

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土壤中铬价态转化的影响因素与作用机制研究进展

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岩矿测试 2025年第1期44卷 35-50页

作者：陈俊茹沈亚婷刘菲国家地质实验测试中心北京100037 中国地质大学(北京) 北京100083 自然资源部生态地球化学重点实验室北京100037

土壤中铬(Cr)污染是全球性环境问题,六价铬Cr(Ⅵ)因其高毒性及致癌性而成为关注焦点。土壤中的Cr主要以Cr(Ⅲ)和Cr(Ⅵ)的形式存在,两者之间的转化受到诸如土壤pH值、氧化还原电位(Eh)、天然氧化还原剂、有机质和微生物的影响。随着工农... 详细信息

土壤中铬(Cr)污染是全球性环境问题,六价铬Cr(Ⅵ)因其高毒性及致癌性而成为关注焦点。土壤中的Cr主要以Cr(Ⅲ)和Cr(Ⅵ)的形式存在,两者之间的转化受到诸如土壤pH值、氧化还原电位(Eh)、天然氧化还原剂、有机质和微生物的影响。随着工农业活动的增多,土壤中的Cr浓度不断增加,并通过植物吸收进入食物链等多种途径,对生态系统和人体健康构成威胁。本文对Cr在全球范围内的污染现状及来源、土壤中Cr的不同价态及其毒性特征进行了评述,并分析了pH、Eh对土壤中Cr的具体存在形态与价态的影响,及天然氧化还原剂、有机质等因素利用自身化学性质充当电子供体或受体的角色对土壤中Cr价态进行转化的氧化还原机理,以及不同影响因素之间的相互作用关系,从而可以全面理解土壤中Cr价态转化的行为机制。此外,在对Cr价态影响因素深入了解的基础上,总结了以生物炭和纳米材料为代表的先进修复技术方法,这些材料和方法由于能够将Cr(Ⅵ)有效地还原为毒性较小的Cr(Ⅲ),从而降低生态环境风险,因而是一类具有巨大潜在应用价值的修复材料和修复方法,但大规模应用的可行性及其修复效果仍需要进一步验证。

关键词： Cr污染 Cr价态天然氧化还原剂有机质修复技术

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基于边缘引导与特征融合的分阶段图像去模糊

光电子·激光 2025年第1期36卷 17-26页

作者：陈清江邵菲王炫钧西安建筑科技大学理学院

针对现有方法去模糊后图像缺乏足够清晰边缘的问题，提出了一种基于边缘引导与特征融合的分阶段图像去模糊方法，分两个阶段逐步去除模糊。首先，第一阶段应用含双交叉集成注意力模块(dual cross integrated attention module, DCIAM)... 详细信息

针对现有方法去模糊后图像缺乏足够清晰边缘的问题，提出了一种基于边缘引导与特征融合的分阶段图像去模糊方法，分两个阶段逐步去除模糊。首先，第一阶段应用含双交叉集成注意力模块(dual cross integrated attention module, DCIAM)的编解码网络学习不同尺度下图像的内容特征，初步去除模糊信息。然后，构建边缘分支网络(edge branch network, EBN)提取图像边缘特征。再次，设计了边缘引导去模糊模块(edge-guided deblurring module, EGDM)以耦合不同分辨率下图像的内容与边缘特征。最后，第二阶段通过级联的残差块和DCIAM进一步去除图像模糊，并通过引入自校准注意融合模块(self-calibrating attention fusion module, SCAFM)增强特征表达效果。实验结果表明：所提方法去模糊后图像的峰值信噪比和结构相似度均值分别达到32.78 dB和0.964,均优于其他对比方法。所提方法可以显著提高去模糊性能且去模糊后图像边缘结构更加完整。

关键词：图像去模糊边缘引导特征融合多尺度框架注意力机制

Multi-Agent Control:A Graph-Theoretic Perspective

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Journal of Systems Science & Complexity 2021年第5期34卷 1973-2002页

作者： chen fei REN Wei State Key Laboratory of Synthetical Automation for Process Industries Northeastern UniversityShenyang 110004China School of Control Engineering Northeastern University at QinhuangdaoQinhuangdao 066004China. Department of Electrical and Computer Engineering University of CaliforniaRiversideCA 92521USA

Progress in development of multi-agent control is *** approaches for multiagent control,estimation,and optimization are discussed in a systematic way with particular emphasis on the graph-theoretic *** is paid to the design of multi-agent systems via Laplacian dynamics,as well as the role of the graph Laplacian spectrum,the challenges of unbalanced digraphs,and consensus-based estimation of graph *** emergent issues,e.g.,distributed optimization,distributed average tracking,and distributed network games,are also reported,which have witnessed extensive development *** are over 200 references listed,mostly to recent contributions.

关键词： Consensus cooperative control distributed average tracking distributed optimization multi-agent system

SMT-based query tracking for differentially private data analytics systems

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Frontiers of Computer Science 2018年第6期12卷 1192-1207页

作者： chen LUO fei HE Tsinghua National Laboratory for Information Science and Technology (TNList) School of SoftwareTsinghua UniversityBeijing 100084China Key Laboratory for Information System Security Ministry of EducationTsinghua UniversityBeijing 100084China

Differential privacy enables sensitive data to be analyzed in a privacy-preserving manner. In this paper, we focus on the online setting where each analyst is assigned a privacy budget and queries the data interactively. However, existing differentially private data analytics systems such as PINQ process each query independently, which may cause an unnecessary waste of the privacy budget. Motivated by this, we present a satisfiability modulo theories (SMT)-based query tracking approach to reduce the privacy budget usage. In brief, our approach automatically locates past queries that access disjoint parts of the dataset with respect to the current query to save the privacy cost using the SMT solving techniques. To improve efficiency, we further propose an optimization based on explicitly specified column ranges to facilitate the search process. We have implemented a prototype of our approach with Z3, and conducted several sets of experiments. The results show our approach can save a considerable amount of the privacy budget and each query can be tracked efficiently within milliseconds.

关键词： differential privacy privacy budget satisfiability modulo theory

Robust reliable H_∞ control for discrete-time Markov jump linear systems with actuator failures

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Journal of Systems Engineering and Electronics 2008年第5期19卷 965-973页

作者： chen Jiaorong Liu fei Inst. of Automation Jiangnan Univ. Wuxi 214122 P. R. China

The robust reliable H∞ control problem for discrete-time Markovian jump systems with actuator failures is studied. A more practical model of actuator failures than outage is considered. Based on the state feedback method, the resulting closed-loop systems are reliable in that they remain robust stochastically stable and satisfy a certain level of H∞ disturbance attenuation not only when all actuators are operational, but also in case of some actuator failures, The solvability condition of controllers can be equivalent to a feasibility problem of coupled linear matrix inequalities （LMIs）. A numerical example is also given to illustrate the design procedures and their effectiveness.

关键词： discrete-time Markov jump systems actuator failure reliable control robust H∞-control time-delay.

Agent's Optimal Compensation Under Inflation Risk by Using Dynamic Contract Model

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Journal of Systems Science & Complexity 2021年第6期34卷 2291-2309页

作者： fei chen fei Weiyin ZHANG Fanhong yANG Xiaoguang School of Business University of Shanghai for Science and TechnologyShanghai 200093China School of Mathematics-Physics and Finance Anhui Polytechnic UniversityWuhu 241000China School of Mathematics Shanghai University of Finance and EconomicsShanghai 200433China Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China

This paper studies the problem of principal-agent with moral hazard in continuous *** firm’s cash flow is described by geometric Brownian motion(hereafter GBM).The agent affects the drift of the firm’s cash flow by her hidden ***,the firm rewards the agent with corresponding compensation and equity which depend on the *** model extends dynamic optimal contract theory to an inflation ***,the authors obtain the dynamic equation of the firm’s real cash flow under inflation by using the It?***,the authors use the martingale representation theorem to obtain agent’s continuation value ***,the authors derive the Hamilton-Jacobi-Bellman(HJB)equation of investor’s value process,from which the authors derive the investors’scaled value function by solving the second-order ordinary differential *** with He;,the authors find that inflation risk affects the agent’s optimal compensation depending on the firm’s position in the market.

关键词： Equity incentive inflation risk It?formula principal-agent problem the martingale representation theorem

Boundedness and stability of highly nonlinear hybrid neutral stochastic systems with multiple delays

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Science China(Information Sciences) 2019年第10期62卷 133-148页

作者： Mingxuan SHEN chen fei Weiyin fei Xuerong MAO School of Science Nanjing University of Science and Technology School of Mathematics and Physics Anhui Polytechnic University Glorious Sun School of Business and Management Donghua University Department of Mathematics and Statistics University of Strathclyde

This paper reports the boundedness and stability of highly nonlinear hybrid neutral stochastic differential delay equations(NSDDEs) with multiple delays. Without imposing linear growth condition, the boundedness and exponential stability of the exact solution are investigated by Lyapunov functional *** particular, using the M-matrix technique, the mean square exponential stability is obtained. Finally, three examples are presented to verify our results.

关键词： hybrid delay systems neutral stochastic systems multiple delays highly nonlinear