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Three-dimensional matrix for lithium metal anode for next-generation rechargeable batteries: Structure design and interface engineering

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Journal of Energy Chemistry 2019年第6期28卷 167-168页

作者： Long kong Qiang Zhang Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University

The next-generation batteries with very high energy/power densities, affordable cost, safe operation are of paramount importance to electric vehicles and grid-scale storage. Lithium (Li) metal anode paired with conversion reaction cathodes (sulfur and oxygen) is regarded as a Holy Grail research because such battery system can employ earth-abundant elements and afford 3?5 times higher energy density than current lithium ion batteries (3500 Wh kg^-1 for lithium-oxygen batteries and 2600 Wh kg^-1 for lithium-sulfur batteries)[1].

关键词： Lithium metal anode Carbon nanofibers Nitrogen doped carbon nanomaterials Dendrite formation Electrochemical energy storage

Characterization of the amino-terminal domain of Mx2/MxB-dependent interaction with the HIV-1 capsid

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Protein & Cell 2014年第12期5卷 954-957页

作者： Jia kong School of Life Science Tianjin University Tianjin 300072 China Collaborative Innovation Center of Chemical Science and Engi- neering Tianjin 300072 China Department of Molecular Microbiology and Immunology Johns Hopkins Bloomberg School of Public Health Baltimore MD 21205 USA Institute of Virology and AIDS Research First Hospital of JilinUniversity Changchun 130061 China

Dear Editor More than 50 years have passed since the myxovirus resis- tance （MX） genes were first discovered and found to suppress infection with influenza viruses in mice （Lindenmann, 1962）. Like most mammals, mice carry two MXgenes, MX1 and MX2, which have arisen by gene duplication; both of these genes exhibit antiviral activity against a wide range of viruses （Liu et al., 2013）. Humans also have two MX genes, encoding the MxA and MxB proteins, which are interferon-induced, dynamin- like large molecular weight guanosine triphosphatases （GTP- ases）. The antiviral functions of MxA have been deeply explored： MxA can protect cells from infection by multiple groups of pathogenic DNA and RNA viruses, such as influenza A virus and hepatitis B virus （Liu et al., 2013）.

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Separation of phosphorus from dephosphorization slag modified by alkaline oxide by HCl leaching

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Journal of Iron and Steel Research International 2023年第4期30卷 687-696页

作者： Hui kong Chuan-ming Du School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243002AnhuiChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina

Dephosphorization slag is one of the bulk solid wastes generated from *** P is effectively removed from dephosphorization slag,a phosphate source which can substitute for phosphate rocks is obtained;meanwhile,the tailings can be reutilized as a feedstock in steel *** realize the integrated utilization of dephosphorization slag,selective leaching was applied for removing the P-bearing mineral phase from dephosphorization *** oxide was added as the slag modifier and HCl was selected as the acid *** P selective leaching from dephosphorization slags modified by Na_(2)O or K_(2)O was studied at different pH *** modification,the mass fraction of P in the_(2)CaO∙SiO_(2)–3CaO∙P_(2)O_(5)phase increased,indicating that it was in favor of P_(2)O_(5)*** the Na_(2)O or K_(2)O content increased,the P leaching ratio from slag increased at pH 4,reaching about 80%,and that of Fe was nearly ***_(2)O and K_(2)O modification played a similar role in enhancing the P *** effect of alkaline oxide modification became weak at pH 3,and the slag without modification also realized a good P selective leaching in the HCl *** facilitate the P removal,the leaching of Fe from dephosphorization slag needs to be restrained.

关键词： Dephosphorization slag Phosphorus Selective leaching Modification 2CaO·SiO_(2)–3CaO·P_(2)O_(5)

Microstructure and mechanical property of Sn–Ag–Cu solder material

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Rare Metals 2017年第3期36卷 193-197页

作者： Yi-Gang kong Zhi-Gang kong Feng-Min Shi School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Research Laboratory of Electrical Contacts Beijing University of Posts and TelecommunicationsBeijing 100876China Technology Department Jinan No.10 Radio Factory Co.Ltd.Jinan 250100China

Among the lead-free solder materials,Sn-Ag-Cu alloys have many advantages,such as good wetting property,superior interfacial properties and high creep *** this article,the organization and welding performance of Sn-Ag-Cu material were *** surface morphology of the two alloys was observed by stereoscopic microscope and scanning electron microscope （SEM）.Chemical constitution was examined by X-ray energy-dispersive spectroscopy （EDS）.The mechanical properties of Sn-Ag-Cu solder were evaluated systematically compared with those of Sn-Cu *** results show that Sn-Ag-Cu solder based on different solder pads has different welding *** thickness of intermetallic compound （IMC） at the interface increases with aging *** the gold-plated pads,there are a large number of IMC graphic,and in the welding interface,it can reduce the reliability of electrical *** Sn-Ag-Cu solder joints show a superior mechanical property over the traditional Sn-Cu *** number of dimples decreases and that of cavities increases for Sn-Cu0.7 alloy and the fracture surfaces of Sn-Ag3.0-Cu0.5 alloy have many small size dimples which are homogeneously distributed.

关键词： Lead-free solder Organization Weldingperformance Intermetallic compound

Combining Trend-Based Loss with Neural Network for Air Quality Forecasting in Internet of Things

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Computer Modeling in Engineering & Sciences 2020年第11期125卷 849-863页

作者： Weiwen kong BaoweiWang School of Computer and Software Nanjing University of Information Science and TechnologyNanjing210044China Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing University of Information Science and TechnologyNanjing210044China Engineering Research Center of Digital Forensics Ministry of EducationNanjing210044China

Internet of Things(IoT)is a network that connects things in a special *** embeds a physical entity through an intelligent perception system to obtain information about the component at any *** connects various *** has the ability of information transmission,information perception,and information *** air quality forecasting has always been an urgent problem,which affects people’s quality of life *** far,many air quality prediction algorithms have been proposed,which can be mainly classified into two *** is regression-based prediction,the other is deep learning-based ***-based prediction is aimed to make use of the classical regression algorithm and the various supervised meteorological characteristics to regress themeteorological *** learning methods usually use convolutional neural networks(CNN)or recurrent neural networks(RNN)to predict the meteorological *** an excellent feature extractor,CNN has achieved good performance in many *** the same way,as an efficient network for orderly data processing,RNN has also achieved good ***,few or none of the above methods can meet the current accuracy requirements on ***,there is no way to pay attention to the trend monitoring of air quality *** the sake of accurate results,this paper proposes a novel predicted-trend-based loss function(PTB),which is used to replace the loss function in *** the same time,the trend of change and the predicted value are constrained to obtain more accurate prediction results of PM_(2.5).In addition,this paper extends the model scenario to the prediction of the whole existing training data *** the data on the next day of the model is mixed labels,which effectively realizes the prediction of all *** experiments show that the loss function proposed in this paper is effective.

关键词： Air quality forecasting Internet of Things recurrent neural network predicted trend loss function

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Biomedical and Environmental Sciences 2004年第4期17卷 410-417页

作者： YIYANG kong-LAIZHANG DepartmentofEpidemiology FacultyofPreventiveMediuineGuangdongPharmaceuticalCollegeNo.40GuanghanZhijieBaogangHaizhuDistrictGuangzhou510224GuangdongChina DepartmentofEpidemiology InstituteofBasicMedicalSciencesChineseAcademyofMedicalSciencesSchoolofBasicMedicinePekingUnionMedicalCollegeBeijing100005China

Objective In order to explore the features of discrimination against people with HIV/AIDS in rural areas, a community-based intervention was carried out in two pilot communities of X County of Shanxi Province from September 2002 to October 2003. Methods Data were collected using qualitative methods (in-depth interview and focus group discussion) and anonymously structured questionnaires. Results (1) Severe discrimination against people infected with HIV/AIDS was revealed in the target communities. However, the response to HIV/AIDS was different in each community. (2) People were reluctant to disclose their HIV status or get tested for HIV, which endangered their sexual partners to contract HIV through unprotected sexual intercourses. (3) Attitudes towards people infected with HIV/AIDS varied. (4) Public education promoted a better understanding of HIV/AIDS which in turn improved community attitudes and behaviors towards people with HIV/AIDS. Conclusion HIV/AIDS-related discrimination undermines both individuals and communities responses to HIV/AIDS and may be a serious obstacle towards effective HIV/AIDS prevention and control.

关键词： HIV/AIDS Discrimination Rural area Intervention

Competition of Composition Fluctuation Modes in Weakly Segregated Salt-doped Symmetric Diblock Copolymers

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Chinese Journal of Polymer Science 2024年第9期42卷 1375-1385,I0008页

作者： Yuan-Xin Zhou Xian kong South China Advanced Institute for Soft Matter Science and Technology School of Emergent Soft MatterSouth China University of TechnologyGuangzhou510640China Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices South China University of TechnologyGuangzhou510640China

Salt-doped block copolymers have widespread applications in batteries,fuel cells,semiconductors,and various industries,where their properties crucially depend on phase separation ***,investigations into salt-doped diblock copolymers have predominantly focused on microphase separation,overlooking the segregation between ionic and polymeric *** study employs weak segregation theory to explore the interplay between phase separation dominated by the polymer-modulated mode and the salt-out-modulated mode,corresponding to microscopic and macroscopic phase separations,*** comparing diblock copolymers doped with salts to those doped with neutral solvents,we elucidate the significant role of charged species in modulating phase *** phase separation mode exhibits a transition between the polymer-modulated and salt-out-modulated modes at different *** systems doped with neutral solvents,this transition is stepwise,while in salt-ion-doped systems,it is *** a sufficiently large Flory-Huggins parameter between ions and polymers,the salt-out-modulated mode becomes dominant,promoting macrophase *** to the solvation effect of salt ions,salt-doped systems are more inclined to undergo microphase ***,we explore factors influencing the critical wavenumber of phase separation,including doping level and the Flory-Huggins parameters between two blocks and between ions and polymeric *** findings reveal that in a neutral solvent environment,these factors alter only the boundary between micro-and macro-phase separations,leaving the critical wavenumber unchanged in microphase separation ***,in a salt-doped environment,the critical wavenumber of microphase separation varies with these *** provides valuable insights into the pivotal role of electrostatics in the phase separation of salt-doped block copolymers.

关键词： Block copolymer Phase separation Field theory Salt-doped

Global instability of Stokes layer for whole wave numbers

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Applied Mathematics and Mechanics(English Edition) 2016年第8期37卷 999-1012页

作者： Wei kong Jisheng LUO Department of Mechanics Tianjin University

The study on the global instability of a Stokes layer, which is a typical unsteady flow, is usually a paradigm for understanding the instability and transition of unsteady flows. Previous studies suggest that the neutral curve of the global instability obtained by the Floquet theory is only mapped out in a limited range of wave numbers （0.2 ≤ a ≤ 0.5）. In this paper, the global instability is investigated with numerical simulations for all wave numbers. It is revealed that the peak of the disturbances displays irregularity rather than the periodic evolution while the wave number is beyond the above range. A ＂neutral point＂ is redefined, and a neutral curve of the global instability is presented for the whole wave numbers with this new definition. This work provides a deeper understanding of the global instability of unsteady flows.

关键词： Stokes layer instantaneous instability Floquet theory neutral curve

On the Integrality of Characteristic Elements in Nonabelian Iwasawa Theory

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Acta Mathematica Sinica,English Series 2008年第1期24卷 43-58页

作者： Ling Quan kong School of Mathematical Sciences Beijing Normal University Beijing 100875 P. R. China

This paper is concerned with a conjecture formulated by Coates et al in [4] which describes the relation between the integrality of the characteristic elements and their evaluations in the noncommutative Iwasawa theor... 详细信息

关键词： p-adic Lie group K group characteristic element Iwasawa theory