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High performance columnar-like Fe2O3@carbon composite anode via yolk@shell structural design

Journal of Energy Chemistry 2020年第2期29卷 126-134页

作者： Zhiming Zheng Pei Li Jason Huang Haodong Liu Yi Zao Zhongli Hu Li Zhang Huixin chen Ming-Sheng Wang Dong-Liang Peng Qiaobao Zhang Department of Materials Science and Engineering College of MaterialsXiamen UniversityXiamen 361005FujianChina Department of Nanoengineering University of California San DiegoLa Jolla 92093CAUSA Joint Laboratory for Extreme Conditions Matter Properties Southwest University of Science and TechnologyMianyang 621010SichuanChina Soochow institute for Energy and Materials Innovations(SIEMIS) Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006Jiangsu.China Xiamen institute of Rare Earth Materials Haixi institutesChinese Academy of SciencesXiamen 361024Fujian.China

Conversion-type reaction anode materials with high specific capacity are attractive candidates to improve lithium ion batteries(LIBs), yet the rapid capacity fading and poor rate capability caused by drastic volume change and low electronic conductivity greatly hinder their practical applications. To circumvent these issues, the successful design of yolk@shell Fe2 O3@C hybrid composed of a columnar-like Fe2O3 core within a hollow cavity completely surrounded by a thin, self-supported carbon(C) shell is presented as an anode for high-performance LIBs. This yolk@shell structure allows each Fe2O3 core to swell upon lithiation without deforming the carbon shell. This preserves the structural and electrical integrity against pulverization, as revealed by in situ transmission electron microscopy(TEM) measurement. Benefiting from these structural advantages, the resulting electrode exhibits a high reversible capacity(1013 m Ah g-1 after80 cycles at 0.2 A g-1), outstanding rate capability(710 m Ah g-1 at 8 A g-1) and superior cycling stability(800 m Ah g-1 after 300 cycles at 4 A g-1). A Li-ion full cell using prelithiated yolk@shell Fe2 O3@C hybrid as the anode and commercial Li CoO2(LCO) as the cathode demonstrates impressive cycling stability with a capacity retention of 84.5% after 100 cycles at 1 C rate, holding great promise for future practical applications.

关键词： Fe2O3 Mesoporous carbon Yolk@shell Lithium ion battery

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美陆军网络与电子战融合发展分析

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通信技术 2024年第8期57卷 805-815页

作者：刘文斌陈益龙覃勐范平志吉磊丁建锋西南交通大学信息科学与技术学院四川成都611756 中国电子科技集团公司第三十研究所四川成都610041 陆军装备部驻成都地区第三军事代表室四川成都611756

美陆军网络空间作战与电子战在作战条令、技术和装备方面都发展较快,但缺少全方位理解和关联关系的深入分析。对其网络建设与电子战发展现状进行深度分析发现,美陆军以数据融合、网络协同等作战需求为牵引,以战略与指南手册为先手,以能... 详细信息

美陆军网络空间作战与电子战在作战条令、技术和装备方面都发展较快,但缺少全方位理解和关联关系的深入分析。对其网络建设与电子战发展现状进行深度分析发现,美陆军以数据融合、网络协同等作战需求为牵引,以战略与指南手册为先手,以能力集和项目方式推动关键技术的突破,结合统一、高安全的战术网络发展路线,规划电子战装备并不断更新迭代,支撑网络空间作战与电子战的加速融合。对上述发现进行提炼,得出美陆军新网络建设、新基础支撑、新技术转化、新能力塑造、新战法融合、新装备集成的网络与电子战融合发展趋势与启示。

关键词：电子战网络空间作战战法融合高安全

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差分编码辅助的机器学习CSI反馈方法

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电子信息对抗技术 2024年第2期39卷 64-71页

作者：卿朝进刘文慧刘宇畅叶青王子龙陈金良西华大学电气与电子信息学院成都610039 中国电子科技集团公司第二十九研究所成都610036 西华大学航空航天学院成都610039

在大规模多输入多输出(massive Multiple Input Multiple Output,mMIMO)系统中,信道状态信息(Channel State Information,CSI)反馈严重占用上行带宽资源。为此,提出差分编码辅助的机器学习CSI反馈,探索节省上行带宽资源,减小用户设备(Us... 详细信息

在大规模多输入多输出(massive Multiple Input Multiple Output,mMIMO)系统中,信道状态信息(Channel State Information,CSI)反馈严重占用上行带宽资源。为此,提出差分编码辅助的机器学习CSI反馈,探索节省上行带宽资源,减小用户设备(User equipment,UE)能量开销的途径。在UE端,通过差分编码方式反馈CSI,避免UE端发送用于上行信道估计的导引,从而减小上行带宽资源占用,并节省UE能量开销。在基站(Base Station,BS)端,首先对接收信号进行差分译码,随后构建轻量化神经网络恢复下行CSI。仿真结果表明,相对于上行导引信道估计的CSI反馈,所研究的差分编码辅助的机器学习CSI反馈方法在节省上行带宽资源、减小UE能量消耗的同时,提高了下行CSI的重构精度。

关键词： CSI 差分编码带宽资源能量消耗

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Engineering multifunctional bioadhesive powders through dynamic metal-ligand coordination

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Science China Chemistry 2022年第11期65卷 2260-2273页

作者： Junchang Guo Yue Hou Liansong Ye Junnan chen Hong Wang Li Yang Jinbo Jiang Qiangqiang Sun Chaoming Xie Bing Hu Jiaxi Cui Xu Deng institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Key Lab of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China West China Hospitcal Sichuan UniversityChengdu 610041China institute for Advanced Study Chengdu UniversityChengdu 610106China

Bioadhesive gels with robust adhesion on wet and irregular tissue surfaces are desirable for clinical *** of bioadhesive powders is an effective strategy for obtaining gels that adhere to wet and irregular tissue surfaces by absorbing interfacial ***,current bioadhesive powders lack positive biological functions and are prone to postoperative ***,we present a powder strategy based on metal-ligand coordination to create a series of bioadhesive polyacrylic acid(PAA)*** the gel network,metal ions(M^(n+))are used to coordinate with the carboxy ligands of PAA to form dynamic noncovalent *** powders can absorb interfacial water and assemble into gels on wet and irregular tissue surfaces within a few seconds,forming an initial adhesion layer by electrostatic ***,the polymers can diffuse into the tissue matrix,and metal-ligand coordination is reconstructed to enhance the ***,with a cationic shield layer,the bioadhesive powders can effectively avoid postoperative ***,M^(n+) ions endow the gel with customized biological *** demonstrate that the hemostatic,antibacterial,peroxidase-like catalytic,and photodetachment abilities of the gels by incorporating different M^(n+) *** advantages make the bioadhesive powder a promising platform for diverse tissue repair applications.

关键词： bioadhesive powders adhesive gel water-triggered gelation metal-ligand coordination functional gel

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电容器的柔性上电技术研究

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环境技术 2024年第5期42卷 131-135页

作者：余俊宏徐意婷陈致宇陶壮意李杨西南电子设备研究所成都610036 四川省高效电源变换技术工程研究中心成都610036

针对电容器的低动态阻抗特性带来的上电浪涌电流问题,提出一种具有柔性上电特性的新型电容器,有助于增强电容器应用的便捷性。本文研究了当前电容器上电浪涌电流抑制技术的局限性,设计了一种具有变阻特性的新型电路拓扑结构,通过与传统... 详细信息

针对电容器的低动态阻抗特性带来的上电浪涌电流问题,提出一种具有柔性上电特性的新型电容器,有助于增强电容器应用的便捷性。本文研究了当前电容器上电浪涌电流抑制技术的局限性,设计了一种具有变阻特性的新型电路拓扑结构,通过与传统电容器进行一体化集成,使新型电容器具有了上电时高阻抗和工作时低动态阻抗的特点,并研究改造制作了一款500 V/120 uF钽电容器。最后,实验结果显示,经改造后的电容器成功展现出上电时高阻抗、工作时低动态阻抗的特性,有效抑制了上电浪涌电流,验证了所提新型电路拓扑方案的可行性和有效性。

关键词：上电浪涌电流变阻特性一体集成

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Enhancing the Adversarial Transferability with Channel Decomposition

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Computer Systems Science & Engineering 2023年第9期46卷 3075-3085页

作者： Bin Lin Fei Gao Wenli Zeng Jixin chen Cong Zhang Qinsheng Zhu Yong Zhou Desheng Zheng Qian Qiu Shan Yang Sichuan Normal University Chengdu610066China Jinan Geotechnical Investigation and Surveying institute Jinan250000China School of Computer Science and Engineering Sichuan University of Science&EngineeringZigong643000China School of Computer Science Southwest Petroleum UniversityChengdu610500China AECC Sichuan Gas Turbine Estab Mianyang621000China School of Physics University of Electronic Science and Technology of ChinaChengdu610056China School of Power and Energy Northwestern Polytechnical UniversityXi’an710072China Department of Chemistry Physics and Atmospheric ScienceJackson State UniversityJacksonMSUSA

The current adversarial attacks against deep learning models have achieved incredible success in the white-box ***,they often exhibit weak transferability in the black-box scenario,especially when attacking those with defense *** this work,we propose a new transfer-based blackbox attack called the channel decomposition attack method(CDAM).It can attack multiple black-box models by enhancing the transferability of the adversarial *** the one hand,it tunes the gradient and stabilizes the update direction by decomposing the channels of the input example and calculating the aggregate *** the other hand,it helps to escape from local optima by initializing the data point with random ***,it could combine with other transfer-based attacks *** experiments on the standard ImageNet dataset show that our method could significantly improve the transferability of adversarial *** with the state-of-the-art method,our approach improves the average success rate from 88.2%to 96.6%when attacking three adversarially trained black-box models,demonstrating the remaining shortcomings of existing deep learning models.

关键词： Adversarial attack transferability black-box models deep learning

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Blockading a new NSCLC immunosuppressive target by pluripotent autologous tumor vaccines magnifies sequential immunotherapy

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Bioactive Materials 2022年第7期7卷 223-238页

作者： Hong Wu Hongyan Li Yiqiang Liu Jingchen Liang Qianshi Liu Zhigang Xu Zhongzhu chen Xia Zhang Kun Zhang Chuan Xu Integrative Cancer Center&Cancer Clinical Research Center Sichuan Cancer Hospital&InstituteSichuan Cancer Center School of MedicineUniversity of Electronic Science and Technology of ChinaNo.55Section 4South Ren-min RoadChengdu610042SichuanPR China Department of Medical Ultrasound and Central Laboratory Shanghai Tenth People’s HospitalUltrasound Research and Education InstituteTongji University School of MedicineNo.301 Yan-chang-zhong RoadShanghai200072PR China International Academy of Targeted Therapeutics and Innovation Chongqing University of Arts and SciencesNO.319Red River AvenueYong-chuan402160ChongqingPR China institute of Pathology and southwest Cancer Center Southwest HospitalThird Military Medical University(Army Medical University)NO.30Gao-tan-yan-zheng StreetChongqing400038PR China

The presence of multiple immunosuppressive targets and insufficient activation and infiltration of cytotoxic T lymphocytes(CTLs)allow tumor cells to escape immune surveillance and disable anti-PD-1/PD-L1 ***-engineered autologous tumor vaccines(ATVs)that were camouflaged by tumor cell membrane(TCM)were designed to activate and facilitate CTLs infiltration for killing the unprotected lung tumor cells,consequently realizing the sequential ***5 was firstly screened out as a new immunosuppressive target of lung cancer in clinical *** afterwards,phosphodiesterase-5(PDE5)and programmed cell death 1 ligand 1(PD-L1)dual-target co-inhibition was proposed to unfreeze the immunosuppressive microenvironment of *** studies validated that this ATVs-unlocked sequential immunotherapy after co-encapsulating PDE5 inhibitor and NO donor(i.e.,L-arginine)exerted robust anti-tumor effects through increasing inducible nitric oxide synthase(iNOS)expression,blockading PDE5 pathway and activating systematic immune responses,which synergistically eradicated local and abscopal lung cancers in either orthotopic or subcutaneous *** pluripotent ATVs that enable PDE5 inhibition and sequential immunotherapy provide a new avenue to mitigate immunosuppressive microenvironment and magnify anti-PD-1/PD-L1 immunotherapy.

关键词： Autologous tumor vaccines(ATVs) Sequential immunotherapy Immunosuppressive microenvironment Tumor tropism Immune escape target

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基于现场总线的汽车发动机集中控制装置

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西南师范大学学报（自然科学版） 2004年第2期29卷 221-224页

作者：陈渝光黄丽雯刘玉霞赵玮霖重庆工学院电子信息与自动化学院重庆400050 重庆工学院材料科学与工程学院重庆400050

介绍了一种基于profibus总线的新型发动机集中控制装置的设计方案 .首先 ,讨论了profibus DP现场总线和核心器件SPC3;然后 ,探讨了系统原理和软、硬件设计方案 ;最后。

关键词：现场总线汽车发动机集中控制装置电子控制 pmfibus-DP总线系统构成软件设计

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Mo_(1-x)W_(x)C碳化物稳定性及力学性质的第一性原理计算

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原子与分子物理学报 2024年第3期41卷 127-134页

作者：周少兰丛大龙杨九州李立黄安畏冉旭东陈汉宾李忠盛西南技术工程研究所重庆400039

金属碳化物作为基体的增强相,对钢铁的力学性能起到至关重要的作用.采用基于密度泛函理论的第一性原理方法,通过虚拟晶体近似构建Mo_(1-x)W_(x)C(0≤X≤1)碳化物模型,计算Mo_(1-x)W_(x)C的晶格常数、形成能、结合能、弹性常数、弹性模... 详细信息

金属碳化物作为基体的增强相,对钢铁的力学性能起到至关重要的作用.采用基于密度泛函理论的第一性原理方法,通过虚拟晶体近似构建Mo_(1-x)W_(x)C(0≤X≤1)碳化物模型,计算Mo_(1-x)W_(x)C的晶格常数、形成能、结合能、弹性常数、弹性模量、泊松比u、维氏硬度、电子态密度等性质参数,分析W元素对MoC碳化物稳定性及力学性能的影响.本次计算值与其他理论计算值及试验值吻合度较高;随着W含量的增加,晶格常数增加,Mo_(1-x)W_(x)C的形成能、结合能皆为负值,结合能、形成能的绝对值均随着W含量的增加而增加.不同掺杂含量下的Mo_(1-x)W_(x)C均满足Born判据,在力学上是稳定的,随着W含量的增加,Mo_(1-x)W_(x)C的弹性常数、体模量、杨氏模量、剪切模量呈线性增加,B/G、泊松比降低.Mo_(1-x)W_(x)C在费米能级处的态密度值均不为0,态密度值随着W含量的增加而降低.Mo_(1-x)W_(x)C能自发形成且能稳定存在,随着W含量的增加,Mo_(1-x)W_(x)C碳化物的稳定性、弹性模量、硬度及耐磨性均增加,Mo_(1-x)W_(x)C呈脆性,脆性大小随着w含量的增加而增加.

关键词：第一性原理虚拟晶体近似 Mo_(1-x)W_(x)C 力学性质

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Stability evaluation for steep bank slope with microseismic monitoring in Three Gorges Reservoir area

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Journal of Mountain Science 2022年第6期19卷 1588-1601页

作者： XIE Qing-ming LONG Kui LI Zi-mu chen Li-chuan LIU Hong XU Hong HE Fei LIANG Dan XIANG Xue-kun MA Qiang Chongqing College of electronic Engineering Chongqing 401331China Technology Innovation Center of Geohazards Automatic Monitoring Ministry of Natural ResourcesChongqing Institute of Geology and Mineral ResourcesChongqing 401120China College of Computer and Information Science College of Software Southwest UniversityChongqing 400715China Chongqing Rail Transit Design and Research institute Chongqing 401122China

Rock slide is one of the common geohazard in the Three Gorges Reservoir area, and it affects the shipping of the Yangtze River and the safety of people living on the banks. In order to investigate the internal fracturing mechanism of rock mass, distributed microseismic monitoring network was arranged with 15 three component geophones(3C geophones), deployed at borehole and out of the sliding mass in the unstable Dulong slope. Stein Unbiased Risk Estimation(SURE) method was used to noise suppression for the microseismic record, and decomposition parameters of the Continuous Wavelet Transform(CWT) were determined with maximum energy of correlation coefficient(MECC) method. The signal-to-noise ratio was tripled after the process, and source parameters are obtained with full waveform inversion. The rupture volume model was counted by the irregular grid statistics with the events’ density. It shows that the rock slide is of a small scale and composed of a single block. Moreover, the relationship among microseismicity, displacement and rainfall were discussed in the paper. The deformation rate was dramatically changed in the period of intensive events. There is a good consistency especially in the rainfall period. Although there is a time delay, continuous rainfall is more likely to cause the increase of microseismic events. The results show that the Dulong slope is a shallow rock slide in the state of creep deformation, and the rupture mechanism of the rock mass is left-lateral normal fault with shear failure. The research provides more key information for the early warning and prevention of rock slides and helps to reduce the risk of geohazards.

关键词： Stability evaluation Microseismic monitoring Rock slide Rainfall Displacement

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