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Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： jun Jiang Zhenjie Lu Yanwen Ding Shujun liu Zhijie Qi Tian Tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang Xue Wenyao Zhang Pan Xiong Xin Wang junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Lithium-sulfur batteries Staged dendrite suppression Shuttle effect Surface-negatively-charged nanodiamond

六重荧光RT-PCR快速检测A、B型流感等呼吸道病毒方法的建立

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热带医学杂志 2017年第7期17卷 872-876页

作者：连昌虎唐屹君刘涛深圳市龙岗区坪地预防保健所广东深圳518117 深圳市疾病预防控制中心广东深圳518055 深圳市慢性病防治中心广东深圳518000

目的利用六重荧光RT-PCR法建立起一种快速检测A、B型流感病毒/人偏肺病毒/NL63型、HKU1型和OC43型冠状病毒的方法。方法根据A、B型流感病毒/人偏肺病毒/NL63型、HKU1型和OC43型冠状病毒的保守序列,设计相应的引物和Taqman探针,利用一步... 详细信息

目的利用六重荧光RT-PCR法建立起一种快速检测A、B型流感病毒/人偏肺病毒/NL63型、HKU1型和OC43型冠状病毒的方法。方法根据A、B型流感病毒/人偏肺病毒/NL63型、HKU1型和OC43型冠状病毒的保守序列,设计相应的引物和Taqman探针,利用一步法RT-PCR试剂盒优化反应体系后,采用十倍稀释体外转录RNA检验建立体系的灵敏度和重复性,并建立相对定量的标准曲线;利用具有多种相似临床症状的呼吸道病毒检验建立体系的特异性。结果 A、B型流感病毒/人偏肺病毒/NL63型、HKU1型和OC43型冠状病毒的检测灵敏度为100 copies/μL,标准曲线的相关系数都在99%以上,重复性良好,特异性实验未发现有非特异性扩增。结论本研究建立的六重荧光RT-PCR技术可以快速、准确地检测A、B型流感病毒/人偏肺病毒/NL63型、HKU1型和OC43型冠状病毒等六种呼吸道病毒。

关键词：流感病毒A 流感病毒B 偏肺病毒冠状病毒NL63 冠状病毒HKU1 冠状病毒OC43 六重荧光RT-PCR

Redundant discrete wavelet transforms based moving object recognition and tracking

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Journal of Systems Engineering and Electronics 2009年第5期20卷 1115-1123页

作者： Gao tao liu Zhengguang Zhang jun School of Electrical Engineering and Automation Tianjin Univ. Tianjin 300072 P. R. China

A method for moving object recognition and tracking in the intelligent traffic monitoring system is presented. For the shortcomings and deficiencies of the frame-subtraction method, a redundant discrete wavelet transform （RDWT） based moving object recognition algorithm is put forward, which directly detects moving objects in the redundant discrete wavelet transform domain. An improved adaptive mean-shift algorithm is used to track the moving object in the follow up frames. Experimental results show that the algorithm can effectively extract the moving object, even though the object is similar to the background, and the results are better than the traditional frame-subtraction method. The object tracking is accurate without the impact of changes in the size of the object. Therefore the algorithm has a certain practical value and prospect.

关键词： traffic monitoring moving object recognition moving object tracking redundant discrete wavelet.

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有机酸对云凝结核形成的影响

四川环境 2003年第6期22卷 17-19,29页

作者：陶俊刘兰玉陈克军重庆市环境科学研究院重庆400020

对流层中的有机酸主要来源于人类活动和自然的排放,它们对云成核现象有重要作用并且对云凝结核(CCN)的数量有显著的贡献,但具体哪些种类的有机酸起着什么样的作用以及有多大的作用却鲜为人知。为此,本文结合国内外在相关领域的研究成果... 详细信息

对流层中的有机酸主要来源于人类活动和自然的排放,它们对云成核现象有重要作用并且对云凝结核(CCN)的数量有显著的贡献,但具体哪些种类的有机酸起着什么样的作用以及有多大的作用却鲜为人知。为此,本文结合国内外在相关领域的研究成果,概要介绍了对流层中有机酸(主要是甲酸,乙酸,丙酮酸,草酸)的含量、来源、存在形态及其对云凝结核影响。

关键词：有机酸云凝结核源

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帮部桁架支护技术在巷道压力区治理中的应用

山东煤炭科技 2016年第12期34卷 5-6,9页

作者：姜继巧王建军刘涛枣庄矿业集团高庄煤业有限公司山东微山277605

该文主要介绍了在回采工作面巷道沿空窄煤柱侧帮部压力区治理中所采用的方法及支护技术,通过把顶板桁架支护技术灵活运用到帮部,形成帮部桁架支架方式,成功治理了沿空窄煤柱巷道帮部变形量大的问题,同时,采用喷浆与帮部桁架形成联合支... 详细信息

该文主要介绍了在回采工作面巷道沿空窄煤柱侧帮部压力区治理中所采用的方法及支护技术,通过把顶板桁架支护技术灵活运用到帮部,形成帮部桁架支架方式,成功治理了沿空窄煤柱巷道帮部变形量大的问题,同时,采用喷浆与帮部桁架形成联合支护的方式,不但解决了压力区帮部治理,而且避免了采区空有害气体的溢出,保证了工作面安全回采。

关键词：采煤桁架压力区支护

Progress of entransy analysis on the air-conditioning system in buildings

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Science China(Technological Sciences) 2016年第10期59卷 1463-1474页

作者： ZHANG tao liu XiaoHua TANG HaiDa liu jun Department of Building Science Tsinghua University School of Aerospace Tsinghua University

It is of great importance to improve the energy performance of the air-conditioning system for building energy conversation. Entransy provides a novel perspective to investigate the losses existing in the air-conditioning system. The progress of entransy analysis in the air-conditioning system is comprehensively investigated in the present study. Firstly missions and characteris- tics of the air-conditioning system are analyzed with emphasis on heat or mass transfer process. It is found that reducing the temperature difference, i.e. reducing the entransy dissipation helps to improve the performance. Entransy dissipations and thermal resistances of typical transfer processes in the air-conditioning system are presented. Characteristics of sensible heat transfer process and coupled heat and mass transfer processes are researched in terms of entransy dissipation analysis. Reasons leading to entransy dissipation are also clarified with the help of unmatched coefficient 4. Principles for reducing the entransy dissipation and constructing a high temperature cooling system are summarized on the basis of case studies in typical handling processes. It＇s recommended that reducing mixing process, improving match properties are main approaches to reduce the entransy dissipation. The present analysis is beneficial to casting light on the essence of the air-conditioning system and proposing novel approaches for performance optimization.

关键词： air-conditioning system temperature difference entransy dissipation thermal resistance performance optimization

Simulation of 3D Flow in Turbine Blade Rows including the Effects of Coolant Ejection

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Journal of Thermal Science 2008年第2期17卷 111-115页

作者： Jian-jun liu Bai-tao AN Yun-tao ZENG Institute of Engineering Thermophysics Chinese Academy of SciencesP. O. Box 2706 Beijing 100080 CHINA

This paper describes the numerical simulation of three-dimensional viscous flows in fir-cooled turbine blade rows with the effects of coolant ejection. A TVD Navier-Stokes flow solver incorporated with Baldwin-Lomax turbulence model and multi-grid convergence acceleration algorithm are used for the simulation. The influences of coolant ejection on the main flow are accounted by volumetric coolant source terms. Numerical results for a four-stage turbine are presented and discussed.

关键词： Numerical Simulation Air-Cooled Turbine Blade Row Coolant Ejection

Test research on sticking mechanism during hot rolling of SUS 430 ferritic stainless steel

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International Journal of Minerals,Metallurgy and Materials 2010年第5期17卷 573-578页

作者： jun-xian liu Yong-jun Zhang Jing-tao Han School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

The sticking phenomenon during hot rolling of SUS 430 ferritic stainless steel was investigated by means of a two-disc type high-temperature wear tester. The test results indicate that sticking particles on the surfaces of high chromium steel （HiCr） and high-speed steel （HSS） rolls undergo nucleation, growth, and saturation stages. Grooves on the roll surface generated by grinding provide nucleation sites for sticking particles. The number of sticking particles on the HiCr roll surface is greater than that on the HSS roll surface. The average surface roughnesses （Ra） of HiCr and HSS rolls change from 0.502 and 0.493 μm at the initial stage to 0.837 and 0.530 μm at the saturation stage, respectively. The test further proves that the sticking behavior is strongly dependent on roll materials, and the HSS roll is more benefi- cial to prevent particles sticking compared with the HiCr roll under the same hot-rolling conditions.

关键词： ferritic steel stainless steel hot rolling sticking rolls

Quantum gravity effects on spectroscopy of Kerr-Newman black hole in gravity's rainbow

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Communications in Theoretical Physics 2022年第2期74卷 90-98页

作者： Cheng-Zhou liu Jin-jun tao Department of Physics Shaoxing UniversityShaoxing 312000China

The effects of quantum gravity on spectroscopy for the charged rotating gravity’s rainbow are investigated in this *** utilizing an action invariant obtained from particles tunneling through the event horizon,the entropy and area spectrum for the modified Kerr-Newman black hole are *** equally spaced entropy spectrum characteristic of Bekenstein’s original derivation is ***,the entropy spectrum is independent of the energy of the test particles,although the gravity’s rainbow itself is the energy *** that,the quantum gravity effects of gravity’s rainbow has no influence on the entropy *** the other hand,due to the spacetime quantum effects,the obtained area spectrum is different from the original Bekenstein *** is not equidistant and is dependent on the horizon *** that,by analyzing the area spectrum from a specific rainbow function,a minimum area with a Planck scale is derived for the event *** this point,the area quantum is zero and the black hole radiation ***,the black hole remnant for the gravity’s rainbow is obtained from the area *** addition,the entropy for the modified Kerr-Newman black hole is calculated and the quantum correction to the area law is obtained and discussed.

关键词： black hole spectroscopy gravity’s rainbow quantum effects