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Fe_(2)TiO_(5)nanochains as anode for high-performance lithium-ion capacitor

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Rare Metals 2021年第9期40卷 2424-2431页

作者： Rong Kang Wang-Qin Zhu Sheng Li bo-bo zou Liao-Liao Wang Guo-Chun Li Xian-Hu Liu Dickon H.L.Ng Jing-Xia Qiu Yan Zhao Fen Qiao Jia-Biao Lian Key Laboratory of Zhenjiang Institute for Energy ResearchJiangsu UniversityZhenjiang 212013China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China Department of Physics The Chinese University of Hong KongShatinHong Kong 999077China

The unique crystal structure and multiple redox couples of iron titanate(Fe_(2)TiO_(5)) provide it a high theoretical capacity and good cycling stability when used as an electrode. In this study, the electrospinning method is employed to synthesize one-dimensional(1 D) Fe_(2)TiO_(5) nanochains. The as-prepared Fe_(2)TiO_(5) nanochains exhibited superior specific capacity(500 mAh·g^(-1) at 0.10 A·g^(-1)),excellent rate performance(180 mAh·g^(-1) at 5.00 A·g^(-1)),and good cycling stability(retaining 100% of the initial specific capacity at a current density of 1.00 A·g^(-1) after1000 cycles). The as-assembled Fe_(2)TiO_(5)/SCCB lithiumion capacitor(LIC) also delivered a competitive energy density(137.8 Wh·kg^(-1))andpowerdensity(11,250 W·kg^(-1)). This study proves that the as-fabricated1 D Fe_(2)TiO_(5) nanochains are promising anode materials for high-performance LICs.

关键词： Lithium-ion capacitors High energy/power densities Anode material Fe_(2)TiO_(5)nanochains Electrospinning

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锂硫二次电池电催化

科学通报 2022年第24期67卷 2906-2920页

作者：邹波波刘芯言彭翃杰电子科技大学基础与前沿研究院成都611731 电子科技大学长三角研究院(湖州) 湖州313001

随着社会发展对储能系统的要求不断提高,锂硫二次电池因其低成本、高能量密度和环境友好等优点,近年来受到广泛关注.但是多硫化物的穿梭效应和缓慢的氧化还原过程限制了硫正极的活性物质利用率,同时导致其快速的容量衰减,阻碍了其实际应... 详细信息

随着社会发展对储能系统的要求不断提高,锂硫二次电池因其低成本、高能量密度和环境友好等优点,近年来受到广泛关注.但是多硫化物的穿梭效应和缓慢的氧化还原过程限制了硫正极的活性物质利用率,同时导致其快速的容量衰减,阻碍了其实际应用.为了解决这些问题,研究者采用“锂硫电催化”模型体系以缓解穿梭效应并促进多硫化物的转化动力学.本文系统总结了包括非均相与均相催化体系在内的锂硫电池电催化材料和模型体系的设计原理及最新研究进展,展望了未来锂硫二次电池电催化研究的主要挑战和发展机遇.

关键词：锂硫电池穿梭效应非均相催化均相催化

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Detection of Perfect Stealthy Attacks on Cyber-Physical Systems Subject to Measurement Quantizations: A Watermark-Based Strategy

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 114-125页

作者： Yu-Ang Wang Zidong Wang Lei zou bo Shen Hongli Dong the College of Information Science and Technology Donghua University the Engineering Research Center of Digitalized Textile and Fashion Technology Ministry of Education IEEE the College of Electrical Engineering and Automation Shandong University of Science and Technology the Department of Computer Science Brunel University London Uxbridge the Sanya Offshore Oil and Gas Research Institute Northeast Petroleum University the Artificial Intelligence Energy Research Institute Northeast Petroleum University Heilongjiang Provincial Key Laboratory of Networking and Intelligent Control Northeast Petroleum University

In this paper, the attack detection problem is investigated for a class of closed-loop systems subjected to unknownbutbounded noises in the presence of stealthy attacks. The measurement outputs from the sensors are quantized before transmission.A specific type of perfect stealthy attack, which meets certain rather stringent conditions, is taken into account. Such attacks could be injected by adversaries into both the sensor-toestimator and controller-to-actuator channels, with the aim of disrupting the normal data flow. For the purpose of defending against these perfect stealthy attacks, a novel scheme based on watermarks is developed. This scheme includes the injection of watermarks(applied to data prior to quantization) and the recovery of data(implemented before the data reaches the estimator).The watermark-based scheme is designed to be both timevarying and hidden from adversaries through incorporating a time-varying and bounded watermark signal. Subsequently, a watermark-based attack detection strategy is proposed which thoroughly considers the characteristics of perfect stealthy attacks,thereby ensuring that an alarm is activated upon the occurrence of such attacks. An example is provided to demonstrate the efficacy of the proposed mechanism for detecting attacks.

关键词：

Maximum Correntropy Kalman Filtering for Non-Gaussian Systems With State Saturations and Stochastic Nonlinearities

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IEEE/CAA Journal of Automatica Sinica 2023年第5期10卷 1223-1233页

作者： bo Shen Xuelin Wang Lei zou the College of Information Science and Technology Donghua UniversityShanghai 201620 the Engineering Research Center of Digitalized Textile and Fashion Technology Ministry of EducationShanghai 201620China

This paper tackles the maximum correntropy Kalman filtering problem for discrete time-varying non-Gaussian systems subject to state saturations and stochastic nonlinearities. The stochastic nonlinearities, which take the form of statemultiplicative noises, are introduced in systems to describe the phenomenon of nonlinear disturbances. To resist non-Gaussian noises, we consider a new performance index called maximum correntropy criterion(MCC) which describes the similarity between two stochastic variables. To enhance the “robustness” of the kernel parameter selection on the resultant filtering performance, the Cauchy kernel function is adopted to calculate the corresponding correntropy. The goal of this paper is to design a Kalman-type filter for the underlying systems via maximizing the correntropy between the system state and its estimate. By taking advantage of an upper bound on the one-step prediction error covariance, a modified MCC-based performance index is constructed. Subsequently, with the assistance of a fixed-point theorem, the filter gain is obtained by maximizing the proposed cost function. In addition, a sufficient condition is deduced to ensure the uniqueness of the fixed point. Finally, the validity of the filtering method is tested by simulating a numerical example.

关键词： Fixed-point theorem maximum correntropy criterion non-Gaussian noises state saturations stochastic nonlinearities

Synthesis of Cyclic Carbonates from Alkenyl and Alkynyl Substrates

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Chinese Journal of Chemistry 2017年第5期35卷 541-550页

作者： bo zou Changwen Hu Key Laboratory of Cluster Science Ministry of Education of ChinaSchool of Chemistry and Chemical Engineering Beo'ing Institute of Technology Beo'ing 100081 China

As an extensively used chemical product,cyclic carbonate was generally synthesized by transesterification,or the cycloaddition of epoxides,diols with *** reduce the production costs and expand the raw materials,alkenyl and alkynyl substrates have caused much attention in the synthesis of cyclic carbonates,such as olefins,allyl alcohols and propargylic *** on the alkenyl substrate,the synthetic process involves a continuous reaction of oxidative carboxylation,with epoxide or halohydrin as an intermediate ***,peroxides and nucleophiles （halogens or organic bases） are often necessary in the *** propargylic alcohols to produce a-alkylidene cyclic carbonates,noble metal catalysts play crucial roles in alkynyl activation,and organic bases are considered to assist the intramolecular and intermolecular proton transfer and combine CO2 *** the carboxyl sources in products,inorganic carbonates and organic carboxylic acids also have some applications instead of *** this review,we summarized the synthetic routes of cyclic carbonates from alkenyl and alkynyl substrates in the aspect of catalyst,mechanism and the development tendency.

关键词： cyclic carbonates CO2 conversion olefins propargylic alcohols

Dynamical Algebraic Approach to the Modified Jaynes-Cummings Model

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Chinese Physics Letters 2001年第1期18卷 51-53页

作者： XU Jing-bo zou Xu-bo Zhejiang Institute of Modern Physics and Department of Physics Zhejiang UniversityHangzhou 310027

The modified Jaynes-Cummings model of a single two-level atom placed in the common domain of two cavities or interacting with two quantized modes is studied by a dynamical algebraic *** the help of an SU(2)algebraic structure,we then obtain the eigenvalues,eigenstates,time evolution operator and atomic inversion operator for the *** proceed to investigate the modified Jaynes-Cummings model governed by the Milburn equation and present the exact solution of the Milburn equation.

关键词： equation. method. algebraic

Recursive Fault Estimation With Energy Harvesting Sensors and Uniform Quantization Effects

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IEEE/CAA Journal of Automatica Sinica 2022年第5期9卷 926-929页

作者： Yu-Ang Wang bo Shen Lei zou College of Information Science and Technology Donghua UniversityShanghai 201620 Engineering Research Center of Digitalized Textile and Fashion Technology Ministry of EducationShanghai 201620China IEEE

Dear Editor,In this letter,the recursive fault estimation issue is considered for nonlinear time-varying systems subject to the effects induced by energy harvesting sensors and uniform *** on the energy harvesting mechanism and stochastic distribution of the absorbed energy,the real-time occurrence probability of missing measurements is calculated *** research intends to develop a recursive estimator for the considered nonlinear time-varying system with energy harvesting sensors,such that,under uniform quantization effects,the state and fault can be jointly *** adopting the induction approach,an upper bound is firstly calculated for the estimation error covariances(EECs)of the state and ***,the value of the time-varying estimator parameter is computed through minimizing such calculated upper *** the end,an illustrative example is presented to verify the availability of the developed fault estimation method.

关键词： method estimation estimator

Recent advances in organic pressure-responsive luminescent materials

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Chinese Chemical Letters 2019年第11期30卷 1883-1894页

作者： Zhiyuan Fu Kai Wang bo zou State Key Laboratory of Superhard Materials College of PhysicsJilin University

Organic luminescent materials are very sensitive to external stimuli,such as pressure,temperature,and electric *** luminescent properties of some organic luminescent materials significantly change under high *** materials may show luminescence discoloration,whereas some may exhibit luminescence *** properties have many potential applications in anticounterfeiting,force sensor,data recording and storage,and luminescent devices,thereby greatly attracting the attention of *** this review,the progress of research on these materials at high pressure in recent years is summarized.

关键词： Pressure-responsive Piezochromic Diamond anvil cell Pressure-induced enhanced emission Organic luminescent

内蒙古农牧交错区典型黑土坡耕地土壤侵蚀空间分布特征

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水土保持研究 2025年第1期32卷 13-20页

作者：邹惠杰刘刚舒成博孙波刘亚张琼郭珍中国科学院教育部水土保持与生态环境研究中心黄土高原土壤侵蚀与旱地农业国家重点实验室陕西杨凌712100 中国科学院水利部水土保持研究所陕西杨凌712100 中国科学院大学北京100049 西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室陕西杨凌712100 四川华标测检测技术有限公司成都610097

[目的]定量了解内蒙古典型黑土区土壤侵蚀速率,探究该区域土壤侵蚀空间分布特征,阐明土壤侵蚀坡面和区域空间分布规律,以期为区域水土流失治理提供参考。[方法]采集内蒙古农牧交错区(海拉尔区、额尔古纳市和牙克石市)典型黑土坡耕地的... 详细信息

[目的]定量了解内蒙古典型黑土区土壤侵蚀速率,探究该区域土壤侵蚀空间分布特征,阐明土壤侵蚀坡面和区域空间分布规律,以期为区域水土流失治理提供参考。[方法]采集内蒙古农牧交错区(海拉尔区、额尔古纳市和牙克石市)典型黑土坡耕地的土壤样品,利用137 Cs示踪技术计算各采样点土壤侵蚀速率,结合小波分析的方法研究土壤侵蚀在坡面的分布特征。[结果](1)3个坡面所有采样点137 Cs含量均小于背景值(1984.24 Bq/m^(2)),表现为所有坡面土壤流失。(2)3个地区的采样坡面平均侵蚀速率表现为:海拉尔〔6533.37 t/(km^(2)·a)〕>额尔古纳〔4174.35 t/(km^(2)·a)〕>牙克石〔2765.87 t/(km^(2)·a)〕。相同坡面的3个纵向断面的平均侵蚀速率相近,同一断面侵蚀速率的变异程度较高。(3)土壤侵蚀速率沿坡长呈强弱交替的周期性变化,但周期长度并不固定。大部分纵向断面存在周期长度为80~160 m和160~200 m的大小两个周期。部分纵向断面只存在一个周期长度为100~120 m的周期。[结论]该地区土壤侵蚀在坡面尺度表现为全坡面侵蚀且在纵向呈现周期性特征,在区域尺度呈现从东到西逐渐增加趋势。

关键词：土壤侵蚀典型黑土农牧交错带小波分析