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Residual alkali-evoked cross-linked polymer layer for anti-air-sensitivity LiNi_(0.89)Co_(0.06)Mn_(0.05)O_(2)cathode

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Journal of Energy Chemistry 2024年第5期92卷 450-458页

作者： Chao Zhao Xuebao Li Yun Zhao Jingjing He yuanpeng Cao Wei Luo Ding wang Jianguo Duan Xianshu wang Baohua Li National and Local Joint Engineering Research Center of Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093YunnanChina School of Materials Science and Engineering Central South UniversityChangsha 410083HunanChina Institute of Materials Research Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055Guangdong China City College Kunming University of Science and TechnologyKunming 650051YunnanChina

High-energy density lithium-ion batteries(LIBs)with layered high-nickel oxide cathodes(LiNi_(x)Co_(y)Mn_(1-x-y)O_(2),x≥0.8)show great promise in consumer electronics and vehicular applications.However,LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)faces challenges related to capacity decay caused by residual alkalis owing to high sensitivity to air.To address this issue,we propose a hazardous substances upcycling method that fundamentally mitigates alkali content and concurrently induces the emergence of an anti-air-sensitive layer on the cathode surface.Through the neutralization of polyacrylic acid(PAA)with residual alkalis and then coupling it with 3-aminopropyl triethoxysilane(KH550),a stable and ion-conductive cross-linked polymer layer is in situ integrated into the LiNi_(0.89)Co_(0.06)Mn_(0.05)O_(2)(NCM)cathode.Our characterization and measurements demonstrate its effectiveness.The NCM material exhibits impressive cycling performance,retaining 88.4%of its capacity after 200 cycles at 5 C and achieving an extraordinary specific capacity of 170.0 mA h g^(-1) at 10 C.Importantly,this layer on the NCM efficiently suppresses unfavorable phase transitions,severe electrolyte degradation,and CO_(2)gas evolution,while maintaining commendable resistance to air exposure.This surface modification strategy shows widespread potential for creating air-stable LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)cathodes,thereby advancing high-performance LIBs.

关键词： Lithium-ion batteries Nickel-rich layered cathode Residual alkalis Cross-linked polyme rmodification Airsensitivity

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Autonomous Formation Flight Control of Large-Sized Flapping-Wing Flying Robots Based on Leader–Follower Strategy

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Journal of Bionic Engineering 2023年第6期20卷 2542-2558页

作者： Hui Xu yuanpeng wang Erzhen Pan Wenfu Xu Dong Xue School of Mechanical Engineering and Automation Harbin Instwitute of TechnologyShenzhen518055China State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin150000China School of Aeronautics Northwestern Polytechnical UniversityXi’an710072China

Birds in nature exhibit excellent long-distance flight capabilities through formation flight,which could reduce energy consumption and improve flight efficiency.Inspired by the biological habits of birds,this paper proposes an autonomous formation flight control method for Large-sized Flapping-Wing Flying Robots(LFWFRs),which can enhance their search range and flight efficiency.First,the kinematics model for LFWFRs is established.Then,an autonomous flight controller based on this model is designed,which has multiple flight control modes,including attitude stabilization,course keeping,hovering,and so on.Second,a formation flight control method is proposed based on the leader–follower strategy and periodic characteristics of flapping-wing flight.The up and down fluctuation of the fuselage of each LFWFR during wing flapping is considered in the control algorithm to keep the relative distance,which overcomes the trajectory divergence caused by sensor delay and fuselage fluctuation.Third,typical formation flight modes are realized,including straight formation,circular formation,and switching formation.Finally,the outdoor formation flight experiment is carried out,and the proposed autonomous formation flight control method is verified in real environment.

关键词： Bionic Large-sized flapping-wing flying robot HIT-Phoenix Periodic flight characteristics Formation flight Leader follower strategy

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Component analysis and risk assessment of biogas slurry from biogas plants

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Chinese Journal of Chemical Engineering 2022年第4期35卷 182-191页

作者： Lanting Ke Xiaobin Liu Bingqing Du yuanpeng wang Yanmei Zheng Qingbiao Li Department of Chemical and Biochemical Engineering College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Food and Biology Engineering Jimei UniversityXiamen 361021China

Massive amounts of biogas slurry are produced due to the development of biogas plants.The pollution features and the risk of biogas slurry were fully evaluated in this work.Thirty-one biogas slurry samples were collected from sixteen different cities and five different raw materials biogas plants(e.***.cattle manure,swine manure,straw-manure mixture,kitchen waste and chicken manure).The chemical oxygen demand(COD),ammonia nitrogen(NH_(4)^(+)-N),anions(e.g.Cl^(-1),SO_(4)^(2-),NO_(3)^(-)and PO_(4)^(3-)),antibiotics(e.***.sulphonamides,quinolones,β2-receptor agonists,macrolides,tetracyclines and crystal violet)and heavy metals(e.g.Cu,Cd,As,Cr,Hg,Zn and Pb)contents from these biogas slurry samples were systematically investigated.On this basis,risk assessment of biogas slurry was also performed.The concentrations of COD,NH_(4)^(+)-N and PO_(4)^(3-) in biogas slurry samples with chicken manure as raw material were significantly higher than those of other raw materials.Therefore,the biogas slurry from chicken manure raw material demonstrated the most serious eutrophication threat.The antibiotic contents in biogas slurry samples from swine manure were the highest among five raw materials,mostly sulphonamides,quinolones and tetracyclines.Biogas slurry revealed particularly serious arsenic contamination and moderate potential ecological risk.The quadratic polynomial stepwise regression model can quantitatively describe the correlation among NH_(4)^(+)-N,PO_(4)^(3+) and heavy metals concentration of biogas slurry.This work demonstrated a universal potential threat from biogas slurry that can provide supporting data and theoretical basis for harmless treatment and reuse of biogas slurry.

关键词： Biogas slurry Antibiotics Heavy metals Risk assessment

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一种适用于复杂电网下的高精度锁相环

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电机与控制学报 2024年第3期28卷 43-55页

作者：黄海宏刘远朋王海欣合肥工业大学电气与自动化工程学院安徽合肥230009

针对现有并网逆变器在电网电压谐波复杂的情况下难以精确锁定电压频率和相位的问题,结合传统锁相环结构与自适应算法的理论提出一种高精度的锁相方法。依据对传统锁相环在复杂电网下的弊端分析,确定了锁相环采用传统低通滤波器、带通滤... 详细信息

针对现有并网逆变器在电网电压谐波复杂的情况下难以精确锁定电压频率和相位的问题,结合传统锁相环结构与自适应算法的理论提出一种高精度的锁相方法。依据对传统锁相环在复杂电网下的弊端分析,确定了锁相环采用传统低通滤波器、带通滤波器时的滤波效果与延时的矛盾关系。根据最小均方算法的高自适应特性与快速跟踪特点,结合锁相环中坐标变换公式,确定算法的输入输出以及权重矩阵,构建基于派克变换的最小均方算法矩阵模型。通过将所需的电压正序分量设置为不断更新的权重矩阵来进行高精度的滤波,同时通过引入均方瞬时误差和自相关估计均值来进行变步长控制,提高滤波更新速度,以适用于复杂程度不确定的电网电压进行自适应滤波锁相。对仿真和样机实验的结果表明:采用基于派克变换的最小均方算法的改进型双二阶广义积分锁相方法,可以在不降低动态响应速度的前提下,提高锁相环的滤波效果,进而提高并网逆变器在电网畸变严重场景下锁定电压频率和相位的跟踪精度。

关键词：锁相环自适应滤波双二阶广义积分最小均方算法变步长

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Effects of substrate types on the transformation of heavy metal speciation and bioavailability in an anaerobic digestion system

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Journal of Environmental Sciences 2021年第3期33卷 361-372页

作者： Xiarong Zheng Kuanhuai Wu Pengju Sun Siyu Zhouyang yuanpeng wang Haitao wang Yanmei Zheng Qingbiao Li Department of Chemical and Biochemical Engineering College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Food and Biological Engineering Jimei UniversityXiamen 361021China

Chemical speciation can fundamentally affect the potential toxicity and bioavailability of heavy metals.The transformation of heavy metal speciation and change of bioavailability were investigated in an anaerobic digestion(AD)system using four different substrates(pig manure(PM),cattle manure(CAM),chicken manure(CHM)and rice straw(RS)).The results obtained indicated that the total contents of heavy metals in PM,CHM and GAM were higher than in RS and decreased in the order Zn>Cu>Ni>Pb>As>Cd in all substrates.Moreover,the speciation with the largest proportion for each heavy metal was the same both in the different substrates and the biogas residues.Among them,Zn,Ni,Cd and As were mainly in the reducible fraction(F2),while Cu was mainly in the oxidizable fraction(F3)and Pb occurred predominantly in the residual fraction(F4).Our results further indicated that the AD process had a greater effect on the speciation of heavy metals in CHM and PM,but less on CAM and RS.The rates of change in bioavailability followed the order PM>CHM>CAM>RS.Changes in organic matter,humic acid or local metal ion environment as a result of AD were inferred as likely mechanisms leading to the transformation of heavy metal speciation.These results enhanced our understanding of the behavior of heavy metals in AD and provided a new perspective for the treatment and disposal of the substrates.

关键词： Anaerobic digestion Heavy metal Speciation Bioavailability

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考虑订单替换的冷链配送-库存联合优化与仿真

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系统仿真学报 2024年第3期36卷 578-594页

作者：万远鹏梁承姬王思洪王钰上海海事大学物流研究中心上海201306

冷链物流最重要的目的是保证产品新鲜度,而在此基础上如何降低订单配送的成本是冷链公司急需解决的问题。对消费者来说,产品的质量与食品安全是其主要的需求。因此以配送中心为研究对象,在配送之前根据产品初始新鲜度将产品分成不同的等... 详细信息

冷链物流最重要的目的是保证产品新鲜度,而在此基础上如何降低订单配送的成本是冷链公司急需解决的问题。对消费者来说,产品的质量与食品安全是其主要的需求。因此以配送中心为研究对象,在配送之前根据产品初始新鲜度将产品分成不同的等级,通过对不符合配送要求的订单采用等级向上的替换模式来提升产品整体新鲜度,使客户尽可能获得更好质量的产品,确保顾客的需求得到满足,同时针对配送与库存分配问题进行联合优化,根据最低新鲜度、库存量等为约束建立了双层规划模型,其中上层模型以运输成本、货损成本等之和最小为目标以此确定订单配送以及库存分配方案,下层模型以订单替换成本最小为目标以此确定需要进行订单替换的订单以及替换的产品等级,通过提出改进的自适应遗传算法与cplex分别求解上下层模型,将求解得到的配送方案代入模拟了道路拥堵的仿真模型中进行验证并重新加入双层模型中进行规划;对算例求解的结果表明:订单替换可以有效降低冷链企业运营成本,获得更符合实际的订单配送与库存的分配方案。

关键词：库存路径优化新鲜度订单替换道路拥堵冷链物流仿真遗传算法

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Nano-sized Fe_2O_3/Fe_3O_4 facilitate anaerobic transformation of hexavalent chromium in soil–water systems

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Journal of Environmental Sciences 2017年第7期29卷 329-337页

作者： Yaxian Zhang Hua Li Libo Gong Guowen Dong Liang Shen yuanpeng wang Qingbiao Li Department of Chemical and Biochemical Engineering College of Chemistry and Chemical EngineeringXiamen University College of Chemistry and Life Science Quanzhou Normal University

The purpose of this study is to investigate the effects of nano-sized or submicro Fe_2O_3/Fe_3O_4 on the bioreduction of hexavalent chromium（Cr（VI）） and to evaluate the effects of nano-sized Fe_2O_3/Fe_3O_4 on the microbial communities from the anaerobic flooding soil.The results indicated that the net decreases upon Cr（VI） concentration from biotic soil samples amended with nano-sized Fe_2O_3（317.1 ± 2.1 mg/L） and Fe_3O_4（324.0 ± 22.2 mg/L） within21 days,which were approximately 2-fold of Cr（VI） concentration released from blank control assays（117.1 ± 5.6 mg/L）.Furthermore,the results of denaturing gradient gel electrophoresis（DGGE） and high-throughput sequencing indicated a greater variety of microbes within the microbial community in amendments with nano-sized Fe_2O_3/Fe_3O_4 than the control assays.Especially,Proteobacteria occupied a predominant status on the phylum level within the indigenous microbial communities from chromium-contaminated soils.Besides,some partial decrease of soluble Cr（VI） in abiotic nano-sized Fe_2O_3/Fe_3O_4 amendments was responsible for the adsorption of nano-sized Fe_2O_3/Fe_3O_4 to soluble Cr（VI）.Hence,the presence of nano-sized Fe_2O_3/Fe_3O_4 could largely facilitate the mobilization and biotransformation of Cr（VI） from flooding soils by adsorption and bio-mediated processes.

关键词： Chromium Iron oxide Nanoparticle Reduction High-throughput sequencing Cr（Ⅵ） reducing bacteria

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Maghemite(γ-Fe_2O_3) nanoparticles enhance dissimilatory ferrihydrite reduction by Geobacter sulfurreducens: Impacts on iron mineralogical change and bacterial interactions

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Journal of Environmental Sciences 2019年第4期31卷 193-203页

作者： Zheng Chen Yaxian Zhang Qingliu Luo Liuying wang Shurui Liu Yajuan Peng Haitao wang Liang Shen Qingbiao Li yuanpeng wang Department of Chemical and Biochemical Engineering College of Chemistry and Chemical EngineeringXiamen University Department of Environmental Science School of Environmental Science and EngineeringTan Kah Kee CollegeXiamen University Key Laboratory of Measurement and Control System for Coastal Environment Fuqing Branch of Fujian Normal University Zhejiang Provincial Key Laboratory of Watershed Science and Health School of Public Health and ManagementWenzhou Medical University

Microbially mediated bioreduction of iron oxyhydroxide plays an important role in the biogeochemical cycle of iron.Geobacter sulfurreducens is a representative dissimilatory ironreducing bacterium that assembles electrically conductive pili and cytochromes.The impact of supplementation withγ-Fe_2O_3 nanoparticles(NPs)(0.2 and 0.6 g)on the G.sulfurreducens-mediated reduction of ferrihydrite was investigated.In the overall performance of microbial ferrihydrite reduction mediated byγ-Fe_2O_3 NPs,stronger reduction was observed in the presence of direct contact withγ-Fe_2O_3 NPs than with indirect contact.Compared to the production of Fe(Ⅱ)derived from biotic modification with ferrihydrite alone,increases greater than 1.6-and 1.4-fold in the production of Fe(Ⅱ)were detected in the biotic modifications in which direct contact with 0.2 g and 0.6 gγ-Fe_2O_3 NPs,respectively,occurred.X-ray diffraction analysis indicated that magnetite was a unique representative iron mineral in ferrihydrite when active G.sulfurreducens cells were in direct contact withγ-Fe_2O_3 NPs.Because of the sorption of biogenic Fe(Ⅱ)ontoγ-Fe_2O_3 NPs instead of ferrihydrite,the addition ofγ-Fe_2O_3 NPs could also contribute to increased duration of ferrihydrite reduction by preventing ferrihydrite surface passivation.Additionally,electron microscopy analysis confirmed that the direct addition ofγ-Fe_2O_3 NPs stimulated the electrically conductive pili and cytochromes to stretch,facilitating long-range electron transfer between the cells and ferrihydrite.The obtained findings provide a more comprehensive understanding of the effects of iron oxide NPs on soil biogeochemistry.

关键词： Iron Ferrihydrite Nanoparticles Reduction Geobacter sulfurreducens

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抗日战争时期红色歌曲及其传播特征

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韶关学院学报 2024年第1期45卷 89-94页

作者：王元鹏沈阳音乐学院音乐教育学院辽宁沈阳110818

考察红色歌曲研究领域的既有成果可以得出,学界对于抗日战争时期红色歌曲及其传播特征还较少关注,而特定时期音乐艺术成果的传播及其价值是当代创新发展音乐艺术的重要借鉴和参考。因此,基于抗战时期红色歌曲的产生背景和音乐艺术成果,... 详细信息

考察红色歌曲研究领域的既有成果可以得出,学界对于抗日战争时期红色歌曲及其传播特征还较少关注,而特定时期音乐艺术成果的传播及其价值是当代创新发展音乐艺术的重要借鉴和参考。因此,基于抗战时期红色歌曲的产生背景和音乐艺术成果,阐述分析此一时期红色歌曲的主要成果及其庄严的政治主题,从思想和艺术方面,总结揭示了抗战时期红歌传播所体现出的吹起中国人民奋起抗战的集结号角、擂响全民同仇敌忾走向杀敌前线的战鼓、成为全民抗战的战略指导、造就中国近现代音乐艺术珍品等意义。与此同时,归纳概括了这一历史时期红色歌曲传播过程中所体现的即时性、阶段性、普及性,以及演唱形式多样和持久性等传播特征。

关键词：抗日战争时期红色歌曲传播特征价值意义

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Triplex-structure based DNA circuits with ultra-low leakage and high signal-to-noise ratio

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Chinese Chemical Letters 2024年第1期35卷 465-470页

作者： Huan Liu Zhihao Ming yuanpeng Zhang Qidong Xia Hao Hu Ruijie Liu Yuheng Liao Yizhou Liu Xiao Liu Xiaoping Zhang Longjie Li Shaogang wang Xianjin Xiao Institute of Reproductive Health Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department and Institute of Urology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department and Institute of Urology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China School of Life Science and Technology Wuhan Polytechnic UniversityWuhan 430030China Department of Laboratory Medicine Tongji hospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

DNA circuits are powerful tools in various applications such as logical computation,molecular diagnosis and synthetic biology.Leakage is a major problem in constructing complex DNA circuits.It directly affects the output signal and harms the circuit’s performance significantly.In the traditional DNA circuits,the gate complex is a duplex structure.There are insufficient energy barriers to prevent spontaneous detachment of strands,resulting in a leak prone.Herein,we have developed triplex-structure based DNA circuit with ultra-low leakage and high signal-to-noise ratio(SNR).The triplex structure improves the stability in the absence of input.At the same time,the driving force of the strand displacement cascades reduces the influence of the triplex structure on the desired reaction.The SNR of the DNA circuit was increased to 695,while the desired reaction rate remained 90%of the conventional translator circuit.The triplex-structure mediated leakage prevention strategy was further tested at different temperatures and in DNA translator and seesaw circuits.We also constructed modular basic logic gates with a high efficiency and low leakage.On this basis,we further constructed triplex-structure based tertiary DNA logic circuits,and the SNR reached 295,which,to the best of our knowledge,was among the highest of the field.We believe that our scheme provides a novel,valid,and general tool for reducing leakages,and we anticipate that it will be widely adopted in DNA nanotechnology.

关键词： Leakage DNA strand displacement cascades Triplex DNA circuits Molecular programming

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