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Chinese Chemical Letters 2024年第9期35卷 179-182页

作者： Lei zhou Youjun zhou Lizhen Fang Yiqiao Bai Yujia Meng Liang Li Jie Yang Yong Yao School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China School of Chemistry and Chemical Engineering Nantong City Key Laboratory of Life-Organic ChemistryNantong UniversityNantong 226019China College of Science Nanjing Forestry UniversityNanjing 210037China

Photosynthesis is the process through which living plants utilize photosynthetic pigments,such as chlorophyll,to convert CO_(2)and water into organic compounds and release O_(2)under visible *** this study,we have successfully constructed a fluorescent supramolecular polymer(P5Py_(2)/Zn/Gen)n by employing orthogonal pillar[5]arene-based molecular recognition and metal ion *** the supramolecular polymer,the guest molecule Gen unit acts as a light-harvesting moiety,as the ACQ effect is inhibited by host-guest interactions,while the(Py)_(2)/Zn center serves as a catalytic *** employing this orthogonal self-assembly strategy,we have enhanced the stability of both the donor and acceptor in catalyzing the reduction of p-nitrophenol to ***,this photocatalyst can be reused at least 5 times without significant conversion *** findings provide a pathway for constructing a recyclable artificial LHS that mimics the entire photosynthesis process.

关键词： Pillararenes Light-harvest Supramolecular polymer Photosynthesis Orthogonal self-assembly

Advanced technologies for single-cell in situ protein profiling

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Science China Chemistry 2022年第1期65卷 48-67页

作者： Wen zhou Xiaoyue Ni Chen Xie Quli Fan Dingbin Liu State Key Laboratory of Organic Electronics and Information Displays and Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Institute of Advanced Materials(IAM)Nanjing University of Posts&TelecommunicationsNanjing 210023China State Key Laboratory of Medicinal Chemical Biology Research Center for Analytical SciencesTianjin Key Laboratory of Biosensing and Molecular RecognitionCollege of ChemistryNankai UniversityTianjin 300071China

Cells are inherently heterogeneous to achieve a diverse spectrum of biological *** understand the underlying protein machinery that achieves these fascinating functions,it is important to develop advanced analytical methods that can profile proteins in their native environment,as protein expression,aggregation,degradation,and regulation define both normal physiology as well as *** and transcriptome sequencing have seen major advances at the single-cell levels,but comprehensive proteomic profiling is still *** conventional proteomic methods,such as enzyme-linked immunosorbent assay(ELISA),western blot,and protein chips,can characterize biomarkers of ***,these ensemble techniques are unsuitable for single-cell *** evidence has shown the significance of in situ,sensitive,quantitative,and multiplexed profiling of biomarkers in single cells for diagnosis and treatment ***,we review the recent development of advanced imaging and spectroscopy techniques,including mass cytometry,immunofluorescence,and surfaceenhanced Raman spectrometry(SERS)for single-cell proteomic *** also provide our view on the challenges and the outlook.

关键词： proteomics single-cell CyTOF immunofluorescence SERS

Investigation of natural ventilation performance of large space circular coal storage dome

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Building Simulation 2021年第4期14卷 1077-1093页

作者： Yaohua Hou Chao Chen Yu zhou Zhixiang Yang Shen Wei Key Laboratory of Green Built Environment and Energy Efficient Technology Beijing University of TechnologyBeijing100124China Department of Fire Commanding China People’s Police UniversityLangfang065000China Huadian Heavy Industries Co. Ltd.Beijing100070China Bartlett School of Construction and Project Management University College LondonWC1E 7HBLondonUK

Large space circular coal storage dome(LSCCSD)offers an environmental and dependable alternative to open stockpiles,and it has been consequently widely applied in ***,due to the lack of scientific guidelines,its natural ventilation performance is lower than *** ventilation potential strongly depends on the roof geometry and opening mode,which have not yet been investigated for *** paper presents a detailed evaluation of the impact of dome geometry(rise span ratio),opening height,and opening modes on the ventilation performance of *** evaluation is based on computational fluid dynamics(CFD)methods and is validated by available wind tunnel *** employed three evaluation indicators,which are wind pressure coefficient,effective ventilation rate,and wind speed *** results demonstrate that the rise span ratio has a significant effect on the wind pressure difference and the effective ventilation rate increases by approximately 9%–42%with a single-annular *** double-annular openings are set in a strong positive pressure zone,the effective ventilation rate increases by 100%and the average wind speed ratio increases by 50%.When it is compared with single one with similar opening height,the effective ventilation rate increases by 25%.The optimum natural ventilation performance for LSCCSD is achieved at a rise span ratio of *** addition,the lateral middle opening is kept higher than the ridge top of the coal *** proposed evaluation approach and design parameters provided instructive information in the building design and ventilation control for LSCCSDs.

关键词： large space circular coal storage dome natural ventilation performance opening mode computational fluid dynamics evaluation indicator

Age stability of La(Fe,Si)_(13) hydrides with giant magnetocaloric effects

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Rare Metals 2022年第3期41卷 992-1001页

作者： He zhou Yi Long Salvatore Miraglia Florence Porcher Hu Zhang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Tianjin College University of Science and Technology BeijingTianjin 301830China CNRS Institut NeelUniversite Grenoble Alpes25 Rue des Martyrs38042 GrenobleFrance Laboratoire Leon Brillouin UMR12 CEA-CNRSBat.563 CEA Saclay91191 Gif sur Yvette CedexFrance

The Curie temperatures(T_(C))of La_(0.7)Ce_(0.3)Fe_(13-x-y)Mn_(x)Si_(y)compounds that are hydrogenated to saturation are raised to near room *** age stability was inves-tigated for the fully hydrogenated La_(0.7)Ce_(0.3)Fe_(11.5-x)Mn_(x)Si_(1.5) *** result indicates that the H content will slowly decrease in the hydrides,leading to a decrease in T_(C).However,no age splitting is observed after the hydrides are held at room temperature for two years,indicating the excellent age stability of the *** structural analysis by neutron diffrac-tion shows that Mn atoms preferentially substitute Fe in the 96i *** T_(C)of La_(0.7)Ce_(0.3)Fe_(11.55-y)Mn_(y)Si_(1.45)hydrides can be adjusted to the desired working temperature by regulating Mn content based on the linear relationship between T_(C)and Mn ***,the La_(0.7)Ce_(0.3)Fe_(11.55-y)Mn_(y)Si_(1.45)hydrides exhibit a giant magnetic entropy change of 15 J·kg^(-1)·K^(-1) under a low magneticfield change of 0-1 *** a result,the giant magnetocaloric effect,linearly adjustable T_(C),and excel-lent age stability make the La_(0.7)Ce_(0.3)Fe_(11.55-y)Mn_(y)Si_(1.45)hydrides be one of the ideal candidates for room temperature magnetic refrigerants.

关键词： Magnetocaloric effect La(Fe,Si)_(13) Hydrides Stability

Interwoven nickel(II)-dimethylglyoxime nanowires in 3D nickel foam for dendrite-free lithium deposition

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Chinese Chemical Letters 2022年第4期33卷 2165-2170页

作者： Tianyi zhou Yanlu Mu Jianyang Wu Bing Zhong Chengkai Yang Qian Wang Wen Liu Henghui zhou Peng Jiang CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Chemical Resource Engineering College of ChemistryBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108China Institute of Energy Innovation College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China

Metal skeletons,such as Nickel Foam(NF) has attracted worldwide interests as stable host for lithium metal anode because of its high stability,large specific surface area and high ***,most metal skeletons have lithophobic surface and uneven current distribution that result in sporadic lithium nucleation and uncontrolled dendrites ***,we describe a sequential immersing strategy to generate interwoven Nickel(Ⅱ)-dimethylglyoxime(Ni-DMG) nanowires at NF to obtain composite skeleton(NDNF),which can be used as an stable host for Li metal *** Ni-DMG has proved effective to realize uniform lithium nucleation and dendrite-free lithium *** with the three dimensional(3 D) hierarchical porous structure,the composite host shows a significantly improved coulombic efficiency(CE) than pristine commercial nickel ***,the corresponding Li‖Li symmetrical cells can run more than 700 h with low voltage hysteresis 22 mV at 1.0 mA/cm^(2),and Li@NDNF‖LiFePO;full-cell exhibits a high capacity retention of 82.03% at 1.0 C during 630 *** results proved the effectiveness of metal-organic complexes in governing Li metal growth and can be employed as a new strategy for dendrite-free Li metal anode and safe Li metal batteries(LMBs).

关键词： Nickel(II)-dimethylglyoxime Nickel foam Metal-organic complex Uniform nucleation Dendrite-free

Aerodynamic Comparison between Increasing Cascade Pitch and Turning Angle in the Highly-Loaded Design

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Journal of Thermal Science 2022年第5期31卷 1709-1722页

作者： zhou Xun XUE Xingxu DU Xin LUO Lei WANG Songtao School of Energy Science and Engineering Harbin Institute of TechnologyHarbin150001China Science and Technology on Diesel Engine Turbocharging Laboratory China North Engine Research InstituteTianjin300270China

Theoretical and numerical study was carried out based on a linear turbine cascade(the Basic cascade)to compare the influences of the increased cascade pitch and turning angle in this *** one hand,the two highly-loaded designs both reduced the stability of flow field through enhancing adverse pressure gradient and span-wise pressure gradient of the fluid near suction ***,the two highly-loaded designs would both result in thicker boundary layer and stronger secondary flow,so the secondary loss would be increased and more difficult to suppress in the highly-loaded *** the other hand,the two highly-loaded designs showed different influences on the pitch-wise migration of the fluid near the endwall(cross flow)because of the different load enhancing *** other words,the increased cascade pitch(TCx highly-loaded design)would delay the pitch-wise migration of the horseshoe vortex because of the increased channel width,while the increased turning angle(Turn highly-loaded design)would do the opposite because of the increased pitch-wise pressure *** a result,the enhancement of the interaction between the fluid near the suction surface and the cross flow would be much stronger in the Turn highly-loaded design than the TCx highly-loaded design,and the span-wise developing tendencies of vortexes and fluid near the suction surface would show much stronger enhancing tendency in the former than the latter.

关键词： linear turbine cascade highly-loaded design secondary flow enhancing pattern enhancing mechanism

A Commutation Failure Prediction and Mitigation Method

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Journal of Modern Power Systems and Clean Energy 2022年第3期10卷 779-787页

作者： Renlong Zhu Xiaoping zhou Haitao Xia Lerong Hong Hanhang Yin College of Electrical and Information Engineering Hunan UniversityChangsha 410082China

The mitigation of commutation failure(CF)depends on the accuracy of CF *** terms of the large error of the existing extinction angle(EA)calculation during the fault transient period,a method for CF prediction and mitigation is *** in both DC current and overlap angle(OA)are considered in the proposed method to predict the EA *** addition,variations in critical EA and the effect of firing angle(FA)on both DC current and OA are considered in the proposed method to obtain the accurate FA order for the control *** proposed method can achieve good performance in terms of CF mitigation and reduce reactive consumption at the inverter side when a fault *** results based on the PSCAD/EMTDC show that the proposed method predicts CF rapidly and exhibits good performance in terms of CF mitigation.

关键词： Commutation failure prediction commutation failure mitigation line commutated converter based high-voltage direct current(LCC-HVDC) extinction angle(EA) overlap angle(OA) firing angle(FA)

Oxidation damage zone formed in creep fatigue crack growth of GH4169 alloy at 650℃

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Journal of Iron and Steel Research International 2023年第12期30卷 2582-2592页

作者： Lan-zhou Liu Yi-fei Gao Jin-hui Du Teng An Central Iron and Steel Research Institute Beijing100081China NCS Testing Technology Co. Ltd.Beijing100081China Beijing Cisri-Gaona Materials and Technology Co. Ltd.Beijing100081China

In the creep fatigue crack growth of GH4169 alloy,oxidation is a prominent damage source,which is mainly manifested as the oxidation damage zone in front of crack *** order to investigate the property of the oxidation damage zone formed in the creep fatigue crack growth,crack growth tests of directly aged GH4169 alloy were conducted at 650℃ in air under various load *** tests were performed to observe the damage characteristics at crack *** tests were systematically executed to quantify the dependency of oxidation damage zone size on load and holding *** crack propagation of the GH4169 alloy has a close relationship with grain boundary oxidation at 650℃.An oxidation damage zone in front of crack tip includes intergranular microcracks and oxidised but uncracked grain *** size has been calculated from transient crack growth rate and described as a function of maximum stress intensity factor and holding *** on oxidation damage zone size,a novel model has been developed to predict the creep fatigue crack growth rate of the GH4169 alloy at 650℃.

关键词： Performance evaluation Creep fatigue crack growth-Directly aged GH4169 alloy Intergranular crack propagation Oxidation damage zone

Low-temperature chemistry in plasma-driven ammonia oxidative pyrolysis

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Green Energy & Environment 2024年第9期9卷 1477-1488页

作者： Mingming Zhang Qi Chen Guangzhao zhou Jintao Sun He Lin School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing100044China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai200240China

Ammonia is gaining increasing attention as a green alternative fuel for achieving large-scale carbon emission reduction. Despite its potential technical prospects, the harsh ignition conditions and slow flame propagation speed of ammonia pose significant challenges to its application in engines. Non-equilibrium plasma has been identified as a promising method, but current research on plasma-enhanced ammonia combustion is limited and primarily focuses on ignition characteristics revealed by kinetic models. In this study, low-temperature and low-pressure chemistry in plasma-assisted ammonia oxidative pyrolysis is investigated by integrated studies of steady-state GC measurements and mathematical simulation. The detailed kinetic mechanism of NH_(3) decomposition in plasma-driven Ar/NH_(3) and Ar/NH_(3)/O_(2) mixtures has been developed. The numerical model has good agreements with the experimental measurements in NH_(3)/O_(2) consumption and N_(2)/H_(2) generation, which demonstrates the rationality of modelling. Based on the modelling results, species density profiles, path flux and sensitivity analysis for the key plasmaproduced species such as NH_(2), NH, H_(2), OH, H, O, O(^(1)D), O_(2)(a^(1)△_(g)), O_(2)(b^(1)∑_(g)^(+)), Ar^(*), H^(-), Ar^(+), NH_(3)^(+), O_(2)^(-) in the discharge and afterglow are analyzed in detail to illustrate the effectiveness of the active species on NH_(3) excitation and decomposition at low temperature and relatively higher E/N values. The results revealed that NH_(2), NH, H as well as H_(2) are primarily generated through the electron collision reactions e + NH_(3)→ e + NH_(2)+ H, e + NH_(3)→ e + NH + H_(2) and the excited-argon collision reaction Ar^(*) + NH_(3)+ H → Ar + NH_(2)+ 2H, which will then react with highly reactive oxidative species such as O_(2)^(*), O^(*), O, OH, and O_(2) to produce stable products of NOx and H_(2)O. NH_(3)→ NH is found a specific pathway for NH_(3) consumption with plasma assistance, which further highlig

关键词： Non-equilibrium plasma Ammonia fuel Oxidative pyrolysis Pathway flux analysis Sensitivity analysis

Thermal Transport across Polyethylene Chains

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Journal of Thermal Science 2022年第4期31卷 1061-1067页

作者： YANG Cong DUAN Xuhui zhou Jun LIU Jun LI Xiaobo School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan 430074China Department of Mechanical and Aerospace Engineering North Carolina State University Raleigh 27695USA NNU-SULI Thermal Energy Research Center&Center for Quantum Transport and Thermal Energy Science School of Physics and Technology Nanjing Normal Universityanjing 210023China

In polymers,heat could transfer efficiently along the long polymer chains;however due to the finite length of polymer chains,such heat eventually has to pass across the chain-chain boundary which is less effective in heat *** paper investigated the thermal transport across polyethylene chains with molecular dynamics(MD)*** transport across two polymer chains overlapping with each other is studied with different chain length(75 nm,150 nm and 251 nm)and chain-chain overlapping *** results show that with increasing overlapping length,the total thermal conductance across the two chains exhibits maximum value,which is due to the increasing thermal resistance along the chains and the decreasing inter-chain thermal boundary ***,we show that the total thermal resistance can be decomposed into two *** coupling term related to the inter-chain thermal resistance tends to saturate even with long overlapping length.

关键词： phonon transport polymer polyethylene thermal resistance van der Waals interaction