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Journal of Advanced Ceramics 2024年第4期13卷 429-436页

作者： Jie Shao Xiyang Li Meng Liu Haiqin Sun Qiwei zha.g Dengfeng peng Fuchi Liu College of Physics and Technology Guangxi Normal UniversityGuilin 541004China guangxi Key Laboratory of Nuclear Physics and Technology Guangxi Normal UniversityGuilin 541004China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

Photo-stimuli responsive materials show great potential in the fields of information encryption and storage due to their distinctive spatial or temporal color ***,the conventional single or multi-color static outputs by light stimulus difficulty meet practical requirements for high-security optical storage ***,a novel dynamic irradiation-responsive phosphor of Na_(2)ba_(2)Si_(2)O_(7):Eu is demonstrated,exhibiting high storage stability and convenient readout *** inherent Eu^(2+)luminescence can be dynamically tuned,instantly read out,and conveniently erased by controlling irradiation duration of a portable diode laser(365 nm).The modulation mechanism is unraveled by optically induced oxidation reactions of Eu^(2+)→Eu^(3+)and defects as killer *** excellent luminescence modulation degree(ΔR_(t)=89.5%)and the accompanying larger color contrast enable the creation of invisible optical codes with multi-level encryption in bright or dark *** results indicate potential applications of Na_(2)ba_(2)Si_(2)O_(7):-based materials in information encryption and invisible optical storage,and are expected to expand more investigations on optically induced PL modulation behaviors based on mixed valences and defects.

关键词： light irradiation luminescent modulation invisible optical storage

鱼腥草乙酸乙酯萃取部位的化学成分及抗植物病原菌活性研究

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天然产物研究与开发 2024年第4期36卷 616-621页

作者：张丽孙建鹏巴其斌兰州城市学院化学工程学院兰州730070

采用硅胶、大孔树脂、葡聚糖凝胶、MCI树脂、薄层色谱以及高效液相色谱等色谱分离方法,从鱼腥草(Houttuynia cordata)地上部分95%乙醇提取物的乙酸乙酯萃取部位分离得到10个化合物。运用质谱、核磁共振等波谱技术和文献对比法鉴定了其结... 详细信息

采用硅胶、大孔树脂、葡聚糖凝胶、MCI树脂、薄层色谱以及高效液相色谱等色谱分离方法,从鱼腥草(Houttuynia cordata)地上部分95%乙醇提取物的乙酸乙酯萃取部位分离得到10个化合物。运用质谱、核磁共振等波谱技术和文献对比法鉴定了其结构,分别鉴定为去氢催吐萝芙木醇(1)、5,6-环氧-3-羟基-β-紫罗兰酮(2)、黑麦草内酯(3)、pubinernoid A(4)、槲皮苷(5)、槲皮素(6)、阿福豆苷(7)、4-甲氧基苯-1,2-二醇(8)、4-羟基苯甲醛(9)、苯甲酸(10)。化合物1~4为首次从鱼腥草中分离得到的降碳倍半萜。对所有化合物进行了抗植物病原菌活性筛选,结果显示:在40 mg/mL浓度下,化合物5~7对禾谷镰刀菌、褐枝孢菌、番茄灰霉病菌、瓜类球腔菌和棉花枯萎病菌抑菌率介于38%~50%之间。

关键词：鱼腥草分离鉴定降碳倍半萜抗植物病原菌活性

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某工业园区表层土壤稀土元素地球化学特征

2022年夏季汉江中下游水华生消驱动因子及其贡献率量化研究

环境化学 2024年第8期43卷 2695-2703页

作者：查春雷袁二军史立群彭红明丛殿阁徐建东屈宏飞青海大学地质工程学院西宁810016 青海省环境地质勘查局/青海省地质环境保护与地灾害防治工程技术研究中心西宁810001 青海九零六工程勘察设计院有限责任公司西宁810001 青海大学省部共建三江源生态与高原农牧业国家重点实验室西宁810016

为探究某工业园区表层土壤中稀土元素的地球化学特征，了解其物质来源及影响因素，采集工业园区周边表层土壤样品，分析稀土元素的含量及空间分布特征，研究稀土元素的配分模式及特征参数，并探讨稀土元素的影响因素. 结果表明：稀土元... 详细信息

为探究某工业园区表层土壤中稀土元素的地球化学特征，了解其物质来源及影响因素，采集工业园区周边表层土壤样品，分析稀土元素的含量及空间分布特征，研究稀土元素的配分模式及特征参数，并探讨稀土元素的影响因素. 结果表明：稀土元素总含量（WREE）范围为52.38—155.78 mg·kg−1，平均值105.02 mg·kg−1，空间分布特征显示稀土元素含量大体上呈现出南高北低的特征;球粒陨石标准化曲线表现为向右倾斜，轻稀土元素富集，重稀土元素亏损;δCe范围为1.00—1.09，平均值1.04，存在轻微的正异常;δEu范围为0.65—0.76，平均值0.71，存在一定的负异常;(La/Yb)N范围为5.96—10.01，平均值7.86，轻重稀土元素之间存在显著的分异现象;(La/Sm)N范围为2.98—4.24，平均值3.42，(gd/Yb)N范围为1.41—1.92，平均值1.65，轻稀土元素存在明显的分馏，重稀土元素分馏程度较低;研究区的成土母质是影响土壤稀土元素含量的主要因素，化学风化活动和矿物导致了轻重稀土元素的分异，人类活动影响了研究区土壤中稀土元素的空间分布，表明土壤中稀土元素主要来自于自然因素，但后期人类活动也会使其在空间上产生分异.

关键词：工业园区土壤稀土元素空间分布影响因素.

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水生态学杂志 2024年第1期45卷 143-151页

作者：查悉妮辛小康付婷李建白凤朋林枭舒鹏长江水资源保护科学研究所湖北武汉430051 长江水利委员会湖库水源地面源污染生态调控重点实验室湖北武汉430051 武汉大学水资源工程与调度全国重点实验室湖北武汉430072

为探究2022年夏季长江流域“汛期反枯”极端水文条件下汉江中下游首次出现的蓝藻水华成因,选取叶绿素浓度为水华表征指标,考虑各环境因子间的多重共线性关系,采用偏最小二乘回归(PLSR)量化了不同环境因子对汉江中下游仙桃、宗关断面蓝... 详细信息

为探究2022年夏季长江流域“汛期反枯”极端水文条件下汉江中下游首次出现的蓝藻水华成因,选取叶绿素浓度为水华表征指标,考虑各环境因子间的多重共线性关系,采用偏最小二乘回归(PLSR)量化了不同环境因子对汉江中下游仙桃、宗关断面蓝藻水华生消的贡献率。结果表明:(1)仙桃断面叶绿素a浓度与水温、pH、溶解氧和总磷均呈显著正相关关系,与氮磷比呈显著负相关关系;宗关断面叶绿素a浓度与水温、pH、溶解氧均呈显著正相关关系,与日均水位、水位日变幅、流量、总磷和氨氮均呈显著负相关关系;(2)溶解氧、pH和水温对水华生消的贡献程度较高,对仙桃断面的贡献率分别为15.18%、13.68%和14.50%,对宗关断面的贡献率分别为18.06%、15.93%和15.65%;(3)基于偏最小二乘路径模型(PLS-PM)的环境因子解析显示,气象因子是2022年夏季汉江中下游蓝藻水华暴发的诱导因子,水华“萌发”时段可能与汉江中下游涝旱急转时段重叠。建议后续研究结合准确的中长期气象预报信息,在涝旱急转时段优化汉江中下游水华防控调度的下泄流量与下泄时机,提高水华防控效果。

关键词：蓝藻水华环境因子量化归因贡献率汉江中下游

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An Integrated Control Framework for Torque Vectoring and Active Suspension System

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Chinese Journal of Mechanical Engineering 2024年第1期37卷 62-73页

作者： Jiwei Feng Jinhao Liang Yanbo Lu Weichao Zhuang Dawei Pi guodong Yin Liwei Xu Pai peng Chaobin Zhou School of Mechanical Engineering Southeast UniversityNanjing 211189China School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Mechano-Electronic Engineering Lanzhou University of TechnologyLanzhou 730050China

Four-wheel independently driven electric vehicles(FWID-EV)endow a flexible and scalable control framework to improve vehicle *** paper integrates the torque vectoring and active suspension system(ASS)to enhance the vehicle’s longitudinal and vertical motion control *** the nonlinear characteristic of the tire model leads to a relatively heavier computational *** facilitate the controller design and ease the load,a half-vehicle dynamics system is built and simplified to the linear-time-varying(LTV)*** a model predictive controller is developed by formulating the objective function by comprehensively considering the safety,energy-saving and comfort *** in-wheel motor efficiency and the power loss of tire slip are treated as optimization indices in this work to reduce energy ***,the effectiveness of the proposed controller is verified through the rapid-control-prototype(RCP)*** results demonstrate the enhancement of the energy-saving as well as comfort on the basis of vehicle stability.

关键词： Four-wheel independently driven electric vehicles Tire nonlinearity Linear-time-varying(LTV)model Model predictive control Rapid control prototype

Piezoelectric materials for pollutants degradation: State-of-the-art accomplishments and prospects

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Chinese Chemical Letters 2024年第4期35卷 61-72页

作者： Yuqing Zhu Haohao Chen Li Wang Liqun Ye Houle Zhou Qintian peng Huaiyong Zhu Yingping Huang College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges UniversityYichang 443002China Engineering Research Center of Eco-environment in Three gorges Reservoir Region Ministry of EducationChina Three Gorges UniversityYichang 443002China College of Hydraulic&Environmental Engineering China Three Gorges UniversityYichang 443002China School of Chemistry and Physics Queensland University of TechnologyBrisbaneQLD 4001Australia

Piezoelectric catalysis, a new catalytic method, is widely used in the field of environmental sanitation, including waste water treatment and dye degradation. However, in the face of the growing environmental pollution problem, the efficiency of piezoelectric catalysis is still hampered by the stress variation in the natural environment. Therefore, it is particularly important to improve the catalytic efficiency of piezoelectric materials. We divide piezoelectric materials into two categories: inorganic piezoelectric materials and organic piezoelectric materials. Then the mainstream inorganic piezoelectric materials are divided into four subcategories, namely:(1) MTiO_(3)(M = ba, Sr),(2) bi-class catalytic materials,(3) MoX_(2)(X = S,Se), and(4) ZnO piezoelectric materials. The mainstream organic piezoelectric materials are divided into PVDF and g-C_(3)N_(4)materials. At the same time, the above materials are summarized to explain the excellent performance of materials from the perspective of structure and piezoelectric principle. In addition,we summarized the modification methods that can be applied to piezoelectric materials:(1) Morphology methods,(2) composites with heterojunctions, and(3) surface modification. Finally, we summarized the prospects of piezoelectric materials in the field of environment and water treatment.

关键词： Ultrasound Cavitation Piezoelectric materials Degradation Organic pollutants

FeNi Prussian blue analogues on highly graphitized carbon nanosheets as efficient glucose sensors

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Rare Metals 2024年第6期43卷 2730-2738页

作者： Jin-Hang Xue Qiu-Hong Sun Cheng Han Yuan-Dong Yang Shao-Jie Xu Qi-peng Li Jin-Jie Qian College of Life and Environmental Science Wenzhou UniversityWenzhou 325000China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325000China College of Chemistry and Chemical Engineering Zhaotong UniversityZhaotong 657000China

Meeting the continuous glucose monitoring requirements of individuals necessitates the research and development of sensors with high sensitivity and *** this study,a straightforward strategy was proposed for synthesizing ultra-thin oxygen-rich graphitized carbon nanosheets(denoted as gCS-O).These nanosheets are obtained by calcining a topologically two-dimensional indium-based coordination ***,the growth of FeNi Prussian blue analogue(Pba)on gCS-O effectively introduces active sites and increases the nitrogen content within the carbonaceous *** resulting FeNi-Pba/gCS-O composite exhibits excellent glucose sensing performance with a broad linear range of 1 to 1300μmol·L^(-1).Meanwhile,it also achieves a high sensitivity of 2496μA·mmol^(-1)·L·cm^(-2),a limit of detection of 100nmol·L^(-1)(S/N=3),and commendable long-term *** relatively simple synthesis process,exceptional sensitivity,and satisfactory electrochemical sensing performance of FeNi-Pba/gCS-O open up new directions for biosensor applications.

关键词： Coordination polymer Carbon nanosheet Prussian blue analogue Surface reconstruction glucose oxidation

Safety,immunogenicity and protective effect of sequential vaccination with inactivated and recombinant protein COVID-19 vaccine in the elderly:a prospective longitudinal study

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2738-2747页

作者： Hong-Hong Liu Yunbo Xie bao-peng Yang Huan-Yue Wen peng-Hui Yang Jin-E Lu Yan Liu Xi Chen Meng-Meng Qu Yang zha.g Wei-guo Hong Yong-gang Li Junliang Fu Fu-Sheng Wang Out-patient Department of Day Diagnosis and Treatment The Fifth Medical Center of Chinese PLA General HospitalBeijing 100039China Senior Department of Infectious Diseases The Fifth Medical Center of Chinese PLA General HospitalNational Clinical Research Center for Infectious DiseasesBeijing 100039China Chinese PLA Medical School Chinese PLA General HospitalBeijing 100039China Hunyuan County People’s Hospital Datong 037499 Shanxi ProvinceChina Faculty of Hepato-Pancreato-Biliary Surgery Institute of Hepatobiliary SurgeryThe First Medical CenterChinese PLA General HospitalBeijing 100853China

The safety and efficacy of COVID-19 vaccines in the elderly,a high-risk group for severe COVID-19 infection,have not been fully *** clarify these issues,this prospective study followed up 157 elderly and 73 young participants for 16 months and compared the safety,immunogenicity,and efficacy of two doses of the inactivated vaccine BBIBP-CorV followed by a booster dose of the recombinant protein vaccine *** results showed that this vaccination protocol was safe and tolerable in the *** administering two doses of the BBIBP-CorV,the positivity rates and titers of neutralizing and anti-RBD antibodies in the elderly were significantly lower than those in the young *** the ZF2001 booster dose,the antibody-positive rates in the elderly were comparable to those in the young;however,the antibody titers remained ***,age,and underlying diseases were independently associated with vaccine immunogenicity in elderly *** pseudovirus neutralization assay showed that,compared with those after receiving two doses of BBIBP-CorV priming,some participants obtained immunological protection against ba.5 and BF.7 after receiving the ZF2001 *** infection symptoms last longer in the infected elderly and pre-infection antibody titers were negatively associated with the severity of post-infection *** antibody levels in the elderly increased significantly after breakthrough infection but were still lower than those in the *** data suggest that multiple booster vaccinations at short intervals to maintain high antibody levels may be an effective strategy for protecting the elderly against COVID-19.

关键词： vaccination vaccine doses

Universal architecture and defect engineering dual strategy for hierarchical antimony phosphate composite toward fast and durable sodium storage

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Journal of Energy Chemistry 2024年第3期90卷 110-119,I0004页

作者： Jiawei Wu gaoyu Wang Wei zha.g Lixiang Wang Jian peng Qinghua Li Zhixin Liang Wenbo Fan Jiazhao Wang Shaoming Huang School of Materials and Energy Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage DevicesGuangdong University of TechnologyGuangzhou 510006GuangdongChina School of Mechanical and Electrical Engineering Jiaxing Nanhu UniversityJiaxing 314001ZhejiangChina Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongInnovation CampusSquires WayNorth WollongongNSW2522Australia

Antimony(Sb)-ba sed anode materials are feasible candidates for sodium-ion batteries(SIBs) due to their high theoretical specific capacity and excellent electrical ***,they still suffer from volume distortion,structural collapse,and ionic conduction interruption upon ***,a hierarchical array-like nanofiber structure was designed to address these limitations by combining architecture engineering and anion tuning strategy,in which SbPO_(4-x) with oxygen vacancy nanosheet arrays are anchored on the surface of interwoven carbon nanofibers(SbPO_(4-x)@CNFs).In particular,bulky PO_(4)^(3-) anions mitigate the large volume distortion and generate Na_(3)PO_(4) with high ionic conductivity,collectively improving cyclic stability and ionic transport *** abundant oxygen vacancies substantially boost the intrinsic electronic conductivity of SbPO_4,further accelerating the reaction *** addition,hierarchical fibrous structures provide abundant active sites,construct efficient conducting networks,and enhance the electron/ion transport *** from the advanced structural design,the SbPO_(4-x)@CNFs electrodes exhibit outstanding cycling stability(1000 cycles at 1.0 A g^(-1) with capacity decay of 0.05% per cycle) and rapid sodium storage performance(293.8 mA h g^(-1) at 5.0 A g^(-1)).Importantly,systematic in-/ex-situ techniques have revealed the "multi-step conversion-alloying" reaction process and the "battery-capacitor dual-mode" sodium-storage *** work provides valuable insights into the design of anode materials for advanced SIBs with elevated stability and superior rate performance.

关键词： SbPO_(4) anodes Hierarchical nanostructures Oxygen vacancy Stress dispersion Sodium-ion batteries

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OP2S发动机换气系统的扫气口结构优化

机械工程与自动化 2024年第4期 42-44页

作者：李宇鹏巴鹏沈阳理工大学机械工程学院辽宁沈阳110159

对置活塞二冲程发动机是一种取消了配气机构和气缸盖的发动机,其换气过程是影响整机燃烧效率和排放水平的重要因素。应用Fluent建立了OP2S发动机换气部分的CFD仿真模型,研究了在扫气倾角为20°时单层扫气口结构与复合扫气口结构缸内气... 详细信息

对置活塞二冲程发动机是一种取消了配气机构和气缸盖的发动机,其换气过程是影响整机燃烧效率和排放水平的重要因素。应用Fluent建立了OP2S发动机换气部分的CFD仿真模型,研究了在扫气倾角为20°时单层扫气口结构与复合扫气口结构缸内气流流动规律。研究结果表明:单层扫气口结构在换气过程中气缸底部出现明显的速度较低的区域,绕气缸轴靠近轴线的残余废气分布面积较大;复合扫气口结构的扫气气流流经气缸轴线中心及外侧,新鲜气体充入气缸时沿气缸轴线平面内的周向速度分量降低,相对于单层扫气口结构湍动能提高了6.2%,有效降低了残余废气系数,换气效果明显优于单层扫气口结构,提高了扫气效率。

关键词：对置活塞二冲程发动机换气过程扫气口结构