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Energy & Environmental Materials 2022年第4期5卷 1180-1188页

作者： Qi Jin kaixin Zhao Lu Li Xinzhi Ma Lili Wu Xitian Zhang Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025China

Among the alternatives to lithium-ion batteries,lithium-sulfur(Li-S)batteries are considered as an attractive option because of their high theoretical energy density of 2570 Wh kg^(−1).However,the application of the Li-S battery has been plagued by the rapid failure of the Li anode due to the Li dendrite growth and severe parasitic reactions between Li and lithium *** physicochemical properties of the solid-electrolyte interphase have a profound impact on the performance of the Li ***,a lithium polyacrylic acid/lithium nitrate(LPL)-protective layer is developed to inhibit the dendrite Li growth and parasitic reactions by tailoring the spatial distribution and content of lin_(x)O_(y) and Li_(3)N at the *** modified SEI is thoroughly investigated for compositions,ion transport properties,and Li plating/stripping ***,the Li-S cell with a high S loading cathode(5.0 mg cm^(−2)),LPL layer-protected thin Li anode(50μm),and 40μL electrolyte shows a long life span of 120 *** work evokes the avenue for regulating the spatial distribution of inorganic nitride at the SEI to suppress the formation of Li dendrites and parasitic reactions in Li-S batteries and perhaps guiding the design of analogous battery systems.

关键词： Li anode Li dendrites LiPAA/linO_(3)layer SEI shuttle effect

In situ construction of zinc-rich polymeric solid–electrolyte interface for high-performance zinc anode

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eScience 2023年第4期3卷 118-126页

作者： Kaixuan Xie kaixin Ren Qinghong Wang Yuxiao lin Fengcan Ma Chuang Sun Yinwei Li Xinsheng Zhao Chao Lai School of Chemistry and Materials Science Jiangsu Normal UniversityXuzhouJiangsu 221116PR China Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronic EngineeringJiangsu Normal UniversityXuzhouJiangsu 221116PR China

With their excellent reliability and environmental friendliness,zinc-ion batteries(ZIBs)are regarded as potential energy storage ***,their poor cycling durability and low Coulombic effectiveness(CE),driven by dendritic growth and surface passivation on the Zn anode,severely restrict their ***,we describe the in situ construction of a Zn-rich polymeric solid–electrolyte interface(SEI)using poly-acrylic acid(PAA)as an electrolyte *** the one hand,the PAA SEI layer offers evenly distributed nucleation sites and promotes ion transport,hence suppressing dendrite *** the other hand,the SEI layer prevents direct contact between the Zn foil and the electrolyte,thus inhibiting side ***,the robust coordination of PAA with Zn^(2+)and the SEI layer's good adherence to the Zn foil provide long-term pro-tection to the Zn *** a result,symmetric cells and Zn/V_(2)O_(5)cells all deliver prolonged cycle life and superior electrochemical efficiency.

关键词： Zn-rich polymeric SEI Electrolyte additive Dendrite growth Chemical corrosion Zinc-ion batteries

Dynamics and diversity of symbiotic bacteria in Apolygus lucorum at different developmental stages

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Journal of Cotton Research 2023年第1期6卷 37-47页

作者： XUE Hui ZHU Xiangzhen WANG Li ZHANG kaixin LI Dongyang JI Jichao NIU lin GAO Xueke LUO Junyu CUI Jinjie State Key Laboratory of Cotton Biology/Institute of Cotton Research Chinese Academy of Agricultural SciencesAnyang 455000HenanChina Zhengzhou Research Base State Key Laboratory of Cotton Biology/Zhengzhou UniversityZhengzhou 450001HenanChina Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory/College of Plant Science and Technology Huazhong Agricultural UniversityWuhan 430070HubeiChina

Background Apolygus lucorum is a worldwide omnivorous pest damaging a range of crops and causing great economic *** bacteria living in insects play a key role in the nutrition,physiology,and behavior of ***,we present an experiment using Illumina HiSeq sequencing targeting the V3–V4 regions of bacteria’s 16S rRNA throughout the entire life cycle of *** The first and second instar nymphs have the largest alpha diversity compared with other life stages of the *** phyla Proteobacteria(72.29%),Firmicutes(15.24%),Actinobacteria(7.76%)exhibit the largest relative abundance in all developmental ***(23.97%)and Lactococcus(10.62%)are the two genera with the high-est relative *** relative abundance of Erwinia in the nymph stage is significantly greater than the adult stage,and the relative abundance of Lactococcus in 6-day-old and 9-day-old adult females is higher compared with adult *** These results reveal that microbial community composition and relative abundance shift dynamically at different life stages,implying that different bacterial phyla and genera may have specific roles in specific life stages such as metabolism,nutrition absorption,detoxification,and *** study reveals for the first time the community composition and ecological dynamics of symbiotic bacteria throughout the life stages of ***,and thus may provide insight to new strategies for pest control.

关键词： Symbiotic bacteria Apolygus lucorum Life cycle Pest control Community composition Relative abundance Community richness

Experimental Study on Ammonia Co-Firing with Coal for Carbon Reduction in the Boiler of a 300-MW Coal-Fired Power Station

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Engineering 2024年第9期40卷 247-259页

作者： Qifu lin Wangping Sun Haiyan Li Yangjiong Liu Yuwei Chen Chengzhou Liu Yiman Jiang Yu Cheng Ning Ma Huaqing Ya Longwei Chen Shidong Fang Hansheng Feng Guang-Nan Luo Jiangang Li kaixin Xiang Jie Cong Cheng Cheng Institute of Energy Hefei Comprehensive National Science Center(Anhui Energy Laboratory)Hefei 230088China Anbang Technology Co.Ltd Tongling 244000China Institute of Plasma Physics Hefei Institute of Matter ScienceChinese Academy of SciencesHefei 230031China

To reduce CO_(2) emissions from coal-fired power plants,the development of low-carbon or carbon-free fuel combustion technologies has become *** a new zero-carbon fuel,ammonia(NH_(3))can be used to address the storage and transportation issues of hydrogen *** it is not feasible to completely replace coal with ammonia in the short term,the development of ammonia-coal co-combustion technology at the current stage is a fast and feasible approach to reduce CO_(2) emissions from coal-fired power *** study focuses on modifying the boiler and installing two layers of eight pure-ammonia burners in a 300-MW coal-fired power plant to achieve ammonia-coal co-combustion at proportions ranging from 20%to 10%(by heat ratio)at loads of 180-to 300-MW,*** results show that,during ammonia-coal co-combustion in a 300-MW coal-fired power plant,there was a more significant change in NO_(x) emissions at the furnace outlet compared with that under pure-coal combustion as the boiler oxygen levels ***,ammonia burners located in the middle part of the main combustion zone exhibited a better high-temperature reduction performance than those located in the upper part of the main combustion *** all ammonia co-combustion conditions,the NH_(3) concentration at the furnace outlet remained below 1 parts per million(ppm).Compared with that under pure-coal conditions,the thermal efficiency of the boiler slightly decreased(by 0.12%-0.38%)under different loads when ammonia co-combustion reached 15 t·h^(-1).Ammonia co-combustion in coal-fired power plants is a potentially feasible technology route for carbon reduction.

关键词： Coal-fired boiler Coal mixing with ammonia Ammonia-coal co-firing Nitrogen oxide(NO_(x)) CO_(2)reduction Boiler thermal efficiency

Study on properties of ultra-low dielectric loss mPPO/MTCLT composites prepared by injection molding

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Journal of Advanced Dielectrics 2022年第3期12卷 28-34页

作者： Yahan Liu Haiyi Peng Xiaogang Yao Minmin Mao kaixin Song Huixing lin College of Electronic Information and Engineering Hangzhou Dianzi University 1158 Baiyang Street 2nd StreetHangzhou 310018P.R.China Key Laboratory of Inorganic Functional Materials and Devices Shanghai Institute of Ceramics Chinese Academy of Sciences588 Heshuo RoadShanghai 201800P.R.China

A novel category of polyphenylene oxide/high-impact polystyrene(PPO/HIPS)alloy was used as the polymer matrix(abbreviated as mPPO)and loaded with different volume fractions(0,10,20,30,40,50 vol.%)of MgTiO_(3)-Ca_(0.7)La_(0.2)TiO_(3)(abbreviated as MTCLT)ceramics to prepare composites by injection *** micromorphology,density,dielectric,thermal and mechanical properties were analyzed in *** experimental results show that the composites possess a compact microstructure because HIPS increases the fluidity of *** to the excellent dielectric properties of both mPPO and MTCLT,the composites have an extremely low dielectric *** realization of the high ceramic filler fraction greatly limits the thermal expansion of the polymer chain by introducing the interphase,so that the coefficient of thermal expansion of the composite material could be as low as 21.8 ppm/°*** the same time,the presence of ceramic particles could reinforce the mechanical property of the *** the ceramic filler fraction is higher than 20 vol.%,the bending strength of the composite material is around 110 *** the ceramic filler fraction is 40 vol.%,the composite possesses the best comprehensive *** dielectric constant is 6.81,the dielectric loss is 0.00104,the thermal expansion coefficient is as low as 25.3 ppm/°C,and the bending strength is 110.4 *** to its excellent properties,this material can be a good candidate in the field of microwave communication.

关键词： Injection molding composites dielectric properties polyphenylene oxide alloy

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P2P应用多层次识别方法研究

华中科技大学学报（自然科学版） 2014年第11期42卷 117-120页

作者：陈琳孔华锋沈开心华中科技大学计算机学院湖北武汉430074 公安部第三研究所上海201204

根据TCP连接的状态转换过程特点建立了一个P2P应用的多层次识别模型,给出了三层识别方法的具体实现.当连接建立时,采用启发式识别方法,迅速将所有流量划分为疑似P2P流量和非P2P流量,过滤非P2P流量;在数据传输的开始阶段,采用基于应用载... 详细信息

根据TCP连接的状态转换过程特点建立了一个P2P应用的多层次识别模型,给出了三层识别方法的具体实现.当连接建立时,采用启发式识别方法,迅速将所有流量划分为疑似P2P流量和非P2P流量,过滤非P2P流量;在数据传输的开始阶段,采用基于应用载荷深度识别的方法识别大多数非加密P2P流量;在数据传输了一段时间后,采用模糊识别的方法,识别运用了加密技术的P2P流量.最后,根据流量识别的结果分析出局域网内每台主机上正在运行的P2P应用.测试结果表明:对未加密的文件共享类应用流量识别率在91%以上,L7-filter的流量识别率为70%左右,本系统对加密的文件共享类应用和流媒体类应用的流量识别率在83%左右,而L7-filter的流量识别率在40%以下.

关键词：对等网络应用识别启发式识别深层数据包识别模糊识别

钢-水泥砂浆石界面动态粘结强度的实验与计算研究

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北京大学学报（自然科学版） 2008年第1期44卷 1-5页

作者：李旭东叶琳刘凯欣北京大学工学院北京100871 第二炮兵工程设计研究院北京100011

设计和制作了一种用以考察钢和水泥砂浆石界面动态粘结强度的新型试件,并开展了实验和计算研究工作。通过准静态实验与冲击实验,研究了钢-水泥砂浆石界面粘结强度随加载速率的提高而产生的变化。计算工作以LS-DYNA软件为有限元计算平台... 详细信息

设计和制作了一种用以考察钢和水泥砂浆石界面动态粘结强度的新型试件,并开展了实验和计算研究工作。通过准静态实验与冲击实验,研究了钢-水泥砂浆石界面粘结强度随加载速率的提高而产生的变化。计算工作以LS-DYNA软件为有限元计算平台,选用Johnson-Holmquist-Cook模型作为水泥砂浆石材料的本构模型。通过计算分析了冲击载荷下界面破坏的过程和机理,并验证了基于split hopkinson pressure bar(SHPB)实验技术的冲击实验方法的可行性和可靠性。研究结果表明界面粘结强度与加载速率的对数大致成线性关系。

关键词：有限元法 Johnson-Holmquist-Cook模型水泥砂浆石粘结强度

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圆环列吸能器的力学机理及应用

清华大学学报（自然科学版） 2007年第5期47卷 746-748页

作者：赵凯刘凯欣叶琳杨嘉陵北京大学工学院湍流与复杂系统国家重点实验室北京100871 北京大学工程研究院北京100871 北京航空航天大学航空科学与工程学院北京100083

为了进一步研究吸能器的机理,采用实验和数值模拟相结合的方法,对冲击载荷作用下6060T 5铝圆环列系统的动力学行为进行了研究。采用改进的SHPB实验系统并配以高速摄影设备,分别记录圆环列的入射波、透射波波形变化及变形过程。数值研究... 详细信息

为了进一步研究吸能器的机理,采用实验和数值模拟相结合的方法,对冲击载荷作用下6060T 5铝圆环列系统的动力学行为进行了研究。采用改进的SHPB实验系统并配以高速摄影设备,分别记录圆环列的入射波、透射波波形变化及变形过程。数值研究前,利用实验数据对计算模型和计算参数进行验证和标定。对工程实际中的若干工况进行了数值分析。结果表明,圆环列吸能器具有较高的吸能率,该系统通过弯曲塑性变形能来消耗冲击能量,回弹发生后整个吸能过程结束。在工程实际中,双层疏排圆环列组合方式是较好的选择。

关键词：圆环列数值模拟吸能率高速摄影

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开发区升格、集聚外部性与出口技术复杂度

经济问题探索 2021年第10期 35-49页

作者：陶涛樊凯欣林董林北京大学经济学院北京100871 上海财经大学经济学院上海200433

开发区作为发展外向型经济的重要平台和载体,有力地推动了我国对外贸易的发展。2009年开发区升格工作的启动标志着我国开发区进入到重视质量建设的新阶段,升格后的开发区将会在我国出口升级中起到更重要的作用。本文以各地开发区升格政... 详细信息

开发区作为发展外向型经济的重要平台和载体,有力地推动了我国对外贸易的发展。2009年开发区升格工作的启动标志着我国开发区进入到重视质量建设的新阶段,升格后的开发区将会在我国出口升级中起到更重要的作用。本文以各地开发区升格政策为准自然实验,利用渐进双重差分法,探究开发区升格对地区出口升级的影响。研究发现:(1)开发区升格政策有效促进了城市-行业层面出口技术复杂度的提升,该结果经过一系列稳健性检验后仍然成立;(2)开发区升格对出口升级的影响存在异质性,在市场化、创新水平较高的地区作用效果更为显著,对技术密集型行业促进作用更大;(3)开发区升格政策推动了区内主导行业出口升级,并且这种政策效应依托主导行业,通过中间品、劳动力和知识外溢渠道,带动了地区关联行业出口技术复杂度提升。

关键词：开发区升格集聚外部性出口技术复杂度渐进双重差分法

Designing Electrochemical Nanoreactors to Accelerate Li_(2)S_(1/2) Three-Dimensional Growth Process and Generating More Li_(2)S for Advanced Li–S Batteries

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Renewables 2023年第3期1卷 341-352页

作者： Junhao Li Kaixiang Shi Jiajie Pan Junda Pan Yongxian lin kaixin Wang Hao Li Jinyun Liao Huafeng Dong Quanbing Liu Guangzhou Key Laboratory of Clean Transportation Energy Chemistry Guangdong Provincial Key Laboratory of Plant Resources BiorefinerySchool of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006 Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200 School of Chemistry and Materials Engineering Huizhou UniversityHuizhou516007 School of Physics and Optoelectronic Engineering Guangdong University of TechnologyGuangzhou 510006

With advantages of low costs and high energy density,Li–S batteries are considered as one of the most promising energy storage ***,Li_(2)S_(2) with a high dissociation energy and insulative properties is hard to convert into Li_(2)S,resulting in underutilization of sulfur ***,Co-Mo_(2)C@C yolk–shell spheres as nanoreactors were designed to confront this challenge *** Co-Mo_(2)C@C-induced Li_(2)S_(1/2) nucleation and growth in the three-dimensional process and the cathode produced more Li_(2)S after full *** studies and theoretical calculations reveal that the conversion barrier from Li_(2)S_(2) into Li_(2)S was lowered while the diffusion of lithium ions and electron transfer accelerated when using the Co-Mo_(2)C@C *** on the above advantages,the Co-Mo_(2)C@C/S cathode exhibits a high reversible capacity and excellent cyclic stability,such as an initial specific capacity of 1200 mAh g^(−1) at 0.1 C with 709 mAh g^(−1) at 1.0 C after 1000 cycles with a low capacity fading rate of 0.04%per *** at high densities of 3.0 C and 5.0 C,the specific capacities are 647.6 and 557.7 mAh g^(−1) after 400 cycles,***,it also shows ca.770 and 900 mAh g^(−1) at 0.2 C after 50 cycles with high sulfur loadings of 4.2 and 5.1 mg cm−2,*** present work may provide new insights into the design of nanoreactors to promote Li_(2)S_(1/2) growth in a three-dimensional process and accelerate conversion from solid Li_(2)S_(2) to solid Li_(2)S in high performance Li–S batteries.

关键词： Li-S batteries cobalt-dopedβ-Mo_(2)C yolk-shell structure optimizing Li_(2)S_(1/2)growth process fast solid-solid conversion of Li_(2)S_(2)-Li_(2)S