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Solvent effects on Diels-Alder reaction in ionic liquids:A reaction density functional study

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chinese Journal of Chemical Engineering 2024年第2期66卷 180-188页

作者： Zijiang Dou Weiqiang tang peng Xie Shuangliang Zhao Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology and school of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China State Key Laboratory of Chemical Engineering and school of Chemical Engineering East China University of Science and TechnologyShanghai 200237China

Extensive experimental studies have been performed on the Diels-Alder(DA)reactions in ionic liquids(ILs),which demonstrate that the IL environment can significantly influence the reaction rates and ***,the underlying microscopic mechanism remains *** this work,the multiscale reaction density functional theory is applied to explore the effect of 1-butyl-3-methylimidazolium hexafluorophosphate([BMIM][PF_(6)])solvent on the reaction of cyclopentadiene(CP)with acrolein,methyl acrylate,or *** analyzing the free energy landscape during the reaction,it is found that the polarization effect has a relatively small influence,while the solvation effect makes both the activation free energy and reaction free energy *** addition,the rearrangement of local solvent structure shows that the cation spatial distribution responds more evidently to the reaction than the anion,and this indicates that the cation plays a dominant role in the solvation effect and so as to affect the reaction rates and selectivity of the DA reactions.

关键词： Solvent effect Ionic liquids Diels-Alder reaction Reaction density functional theory

Assessment of piloting behavior impact on landing risk of transport aircraft

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chinese Journal of Aeronautics 2024年第9期37卷 178-192页

作者： Zhiyue XIONG Shuguang ZHANG Mingkai WANG peng tang Mengmeng WANG school of Transportation Science and Engineering Beihang UniversityBeijing 102206China

The human factors and their interaction with other factors play an important role in the flight safety of transport *** this paper,a paradigm of risk assessment for transport aircraft interacting with piloting behaviors is proposed,with focus on landing which is the most accident-prone flight stage in aviation safety ***-based flight simulation serves as our data source for landing risk analysis under uncertainties.A digital pilot in the loop that reflects the human piloting behaviors is employed to facilitate simulation *** types of unsafe events in landing are identified from *** this basis,the landing safety boundary is extracted via stochastic simulation to divide safety and hazardous flight status domains,which con-tributes to flight status management and risk *** simulation results indicate that appro-priate piloting behavior,which is active response and fast target acquisition with minimum overshoot and fluctuation,shows benefit to landing *** subset simulation technique is employed to further refine the boundary with less computational ***,the effect of airspeed,windspeed,and other factors on landing risk is also *** proposed risk assess-ment method would help optimize operation procedure and develop targeted pilot training program.

关键词： Landing risk assessment Risk parameterization Human factors Piloting behavior model Landing safety boundary Subset simulation

Distribution and influencing factors of acoustic characteristics of seafloor sediment in the Sunda Shelf

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Journal of Oceanology and Limnology 2024年第5期42卷 1486-1492页

作者： Zhengyu HOU Danling tang Jianguo LIU Zhenglin LI peng XIAO school of Ocean Engineering and Technology Sun Yat-sen University&Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519000China Key Laboratory of Comprehensive Observation of Polar Environment(Sun Yat-sen University) Ministry of EducationZhuhai 519082China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)&South china Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 511458China

To understand the acoustic and physical properties of piston core samples collected from the Sunda continental shelf and analyze their distribution patterns,the samples were analyzed in laboratory,from which three provinces were divided in sound speed,sound speed ratio,porosity,wet bulk density,and maximum shear ***Ⅰhad lower sound speed and sound speed ratio(4.,high porosity,and low wet bulk ***Ⅱhad higher sound speed and sound speed ratio(>1.04.,low porosity,and high wet bulk ***Ⅲhad the lowest sound speed and sound speed ratio(0.99),highest porosity(81%),and lowest wet bulk density(1.34.g/cm^(3)).The distribution pattern indicates that sediment movement,sediment source,topography,and hydrodynamic conditions influenced the distribution of acoustic and physical ***,we investigated the relationship of the maximum shear strength to the porosity and wet bulk density,and found that the maximum shear strength was proportional to both the porosity and wet bulk *** finding has significant implications for ocean engineering applications.

关键词： seafloor sediment acoustic property Sunda Shelf

Beamline design for multipurpose muon beams at CSNS EMuS

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Nuclear Science and Techniques 2024年第5期35卷 1-12页

作者： Yang Hong Ying-peng Song Lu-Ping Zhou Jing-Yu tang Zhi-Hao Zhou Nikolaos Vassilopoulos Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China University of chinese academy of sciences Beijing 100049China Radiotherapy Physics and Technology Center Cancer CenterWest China HospitalSichuan UniversityChengdu 610041China Xi’an Jiaotong University Health Science Center Xi’an 710049China Department of Radiation Oncology First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710049China school of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China

A new muon beam facility,called the Experimental Muon Source(EMuS),was proposed for construction at the china Spallation Neutron Source(CSNS).The design of the complex muon beamlines for the EMuS baseline scheme,which is based on superconducting solenoids,superferric dipoles and room-temperature magnets,is presented *** muon beams,including surface muons,decay muons and low energy muons,have been developed for multipurpose *** optics design and simulation results of the trunk beamline and branch beamlines are *** a proton beam power of 25 kW at a standalone target station that consists of a conical graphite target and high-field superconducting solenoids,the muon beam intensity in the trunk beamline varies from 10^(7)/s for surface muons to 10^(10)/s for high-momentum decay *** at the endstations,these values vary from 10^(5)/s for surface muons to 10^(8)/s for decay muons.

关键词： Surface muons Decay muons Muon beamline Superconducting solenoids Multi-channel electrostatic separator

Interface optimization of graphene paper-Cu composite prepared by electrodeposition

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Journal of Iron and Steel Research International 2024年第1期31卷 64-73页

作者： Jing Guo Hai-jing Wang Shuang-juan Liu peng Zhang Jing-yu tang Wei-yang Zhang Han-jie Guo peng-cheng Wang Cai Meng school of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China Advanced Technology and Materials Co. Ltd.Beijing100083China school of Nuclear Science and Technology University of Science and Technology of ChinaHefei230027AnhuiChina

A room-temperature electrodeposition method with an organic electrolyte was developed to fabricate a HNO3-pretreated graphene paper Cu(GP'-Cu)*** improve the interfacial bonding of GP'-Cu composite,magnetron sputtering technology was used to create a"sandwich"structural gradient GP'-Cu *** selection of the intermediate transition layer metal was based on two-dimensional *** electron microscopy,X-ray photoelectron spectroscopy,and other analytical methods confirmed that the addition of an intermediate transition metal(Cr,Ni)layer reduced the gap distance and enhanced the interfacial bonding of the GP'and Cu deposited *** GP'-Ni-Cu composite exhibited the largest increase in tensile strength and *** addition,it had the highest thermal diffusivity and elongation at break among the GP'-Cu,GP'-Cr-Cu and GP'-Ni-Cu composites.

关键词： Graphene paper Two-dimensional disregistry Magnetron sputtering Metal composite

Detection of SARS-CoV-2 based on artificial intelligence-assisted smartphone:A review

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chinese Chemical Letters 2024年第7期35卷 25-34页

作者： Yunxin Li Jinghui Zhang Jisen Chen Feng Zhu Zhiqiang Liu peng Bao Wei Shen Sheng tang school of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Programme in Emerging Infectious Diseases Duke-NUS Medical SchoolSingapore 169857Singapore

In recent years,the application of smartphone in various fields has received great attention,and it has become a promising tool in virus detection,data processing and data *** the rapid spread of COVID-19 around the world,many traditional detection methods have been combined with smartphone to assist in the analysis and detection of the novel coronavirus(SARS-CoV-2),including electrochemistry,fluorescence and *** the gradual development of artificial intelligence(AI),the combination of AI and smartphone to analyze SARS-CoV-2 was also the focus of *** on the summary of the traditional methods combined with smartphone to detect SARS-CoV-2 virus,in addition to AI-based data processing,AI algorithms are also employed for SARS-CoV-2 detection *** review discussed both strategies and focused on the application of the *** combination of AI algorithm and smartphone to detect SARS-CoV-2 has high accuracy,which is more conducive to meeting the needs of portable *** addition,the classification of SARS-CoV-2 virus samples in biological fluids such as blood and saliva was also ***,this paper briefly discussed the limitations of using smartphone analysis to detect SARS-CoV-2,as well as the prospect and future development of virus *** conclusion,the detection methods based on smartphone and AI algorithms show great potential in the detection of SARS-CoV-2 and can be a valuable complement to traditional analysis methods.

关键词： COVID-19 SARS-CoV-2 virus Detection method Smartphone analysis Artificial intelligence

Promising interlayer sensitization strategy for the construction of high-performance blue hyperfluorescence OLEDs

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Light(Science & Applications) 2024年第7期13卷 1372-1382页

作者： Jianghui Wang peng Zou Letian Chen Zhentao Bai Hao Liu Wen-Cheng Chen Yanping Huo Ben Zhong tang Zujin Zhao State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou 510640China. school of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China. school of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhenGuangdong 518172China

Multi-resonance thermally activated delayed fluorescence(MR-TADF)materials are promising candidates for organic light-emitting diodes(OLEDs)with narrow electroluminescence(EL)*** researches focus on fabricating hyperfluorescence OLEDs to improve EL efficiencies of MR-TADF emitters by co-doping them with TADF sensitizers in a single host ***,in many cases,the polarity of the single host could be not suitable for both blue MRTADF emitters and blue TADF sensitizers,resulting in broadened EL spectra in high-polar hosts or decreased EL efficiencies in low-polar ***,we wish to report an efficient sensitization strategy for blue MR-TADF emitters by constructing an interlayer-sensitizing configuration,in which the blue TADF sensitizers and blue MR-TADF emitters are separated into two closely aligned host layers with high polarity and low polarity,*** on this strategy,efficient blue hyperfluorescence OLEDs are realized and verified by employing various TADF sensitizers and different MR-TADF emitters,furnishing outstanding external quantum efficiencies of up to 38.8%and narrow EL *** results validate the feasibility and universality of this interlayer sensitization strategy,which provides an effective alternative to high-performance blue hyperfluorescence OLEDs.

关键词： OLEDs interlayer sensitization

End-group modulation of phenazine based non-fullerene acceptors for efficient organic solar cells with high open-circuit voltage

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Journal of Energy Chemistry 2024年第1期88卷 461-468,I0011页

作者： Yahui Zhang Yafeng Li Ruixiang peng Yi Qiu Jingyu Shi Zhenyu Chen Jinfeng Ge Cuifen Zhang Zheng tang Ziyi Ge school of Materials Science and Engineering Shanghai UniversityShanghai 200444China Zhejiang Business Technology Institute Ningbo 315012ZhejiangChina Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201ZhejiangChina Center for Advanced Low-dimension Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Phenazine-based non-fullerene acceptors(NFAs)have demonstrated great potential in improving the power conversion efficiency(PCE)of organic solar cells(OSCs).Halogenation is known to be an effective strategy for increasing optical absorption,refining energy levels,and improving molecular packing in organic ***,a series of NFAs(Pz IC-4.,Pz IC-4.,Pz IC-4.l,Pz IC-2Br)with phenazine as the central core and with/without halogen-substituted(dicyanomethylidene)-indan-1-one(IC)as the electron-accepting end group were synthesized,and the effect of end group matched phenazine central unit on the photovoltaic performance was systematically *** photophysical and morphological analyses revealed that the PM6:Pz IC-4. blend involves efficient exciton dissociation,higher charge collection and transfer rates,better crystallinity,and optimal phase ***,OSCs based on PM6:Pz IC-4. as the active layer exhibited a PCE of 16.4.%with an open circuit voltage(Voc)and energy loss of 0.880 V and 0.53 e V,***,this work demonstrated a promising approach by designing phenazine-based NFAs for achieving high-performance OSCs.

关键词： Organic solar cells Non-fullerene acceptor Phenazine Central core End group

The acceptance of traditional chinese medicine among patients with Parkinson's disease:A hospital survey

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Journal of Integrative Medicine 2024年第2期22卷 180-187页

作者： peng Wang Jing Hong Zhu-qian tang Bi-zhen Gong Xiao-rong Qi Han Jiang Bo Pan Qi Chen Postgraduate school Medical School of Chinese People’s Liberation ArmyBeijing 100853China Senior Department of Traditional chinese Medicine the Sixth Medical Center of PLA General HospitalBeijing 100853China Department of Integration of chinese and Western Medicine School of Basic Medical SciencesPeking UniversityBeijing 100191China Department of Integrative Oncology the First Affiliated Hospital of Naval Medical UniversityShanghai 200433China school of Traditional chinese Medicine Naval Medical UniversityShanghai 200433China school of Pharmacy Nanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina Department of Dermatology the First Clinical Medical CollegeAnhui University of Chinese MedicineHefei 230012Anhui ProvinceChina

Objective:The efficacy of medications for Parkinson’s disease(PD)tend to decline over time,which has a serious impact on patients’health and quality of *** some extent,traditional chinese medicine(TCM)can resolve the distressing problem of ineffective dopaminergic medication in PD *** purpose of this study was to investigate the attitude,acceptance,and independent predictors of TCM in PD patients admitted to the outpatient department of a tertiary ***:A cross-sectional study of PD patients was conducted in the outpatient department of a large tertiary hospital in Beijing from March 2022 to June 2023.A self-report questionnaire was developed to investigate PD patients’attitudes and acceptance of TCM based on the *** logistic regression analyses were also performed to further clarify the independent predictors influencing patients’adoption of TCM ***:A total of 397 patients completed the questionnaire,of which 78.09%were willing to be treated with TCM and 21.91%indicated that they were not willing to use *** logistic regression analysis showed that several parameters were correlated with a patient’s willingness to include TCM in their therapeutic *** included education level of a bachelor’s degree(odds ratio[OR)=8.554.95%confidence interval[CI]:4.112–17.794.Pschool education),living in an urban setting(OR=8.022;95%CI:4.577–14.060;P4.P4.6–8.616;P=0.006,vs not thought),believing that TCM therapy is effective(OR=3.859;95%CI:1.4.2–10.04.;P=0.006,vs not understood),and being willing to discuss ongoing TCM therapy with an attending physician(OR=62.4.8;95%CI:30.350–128.574.P<0.001,vs not informed).Conclusion:This study initially investigated the acceptance

关键词： Parkinson's disease Traditional chinese medicine Cross-sectional study