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Dual template-induced construction of three-dimensional porous SiO2/NC/Co-CNTs heterostructure with highly dispersed active sites for efficient oxygen evolution reaction

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Tungsten 2024年第3期6卷 585-595页

作者： hai-Qi Zhang Xiao-Jun Zeng Qing-Qing Zhang Zu-Liang Zhang Chu-long Jin Rong-hai Yu School of Materials Science and engineering Jingdezhen Ceramic University School of Materials Science and engineering Beihang University

The development and exploration of efficient and economical electrocatalysts for oxygen evolution reaction（OER） represents the main bottleneck to unlocking a sustainable energy scenario based on elec trocataly tic water *** scale integration of three-dimensional（3D） porous heterostructure with highly dispersed active sites and good structural stability is ***,a dual template route is developed to construct the 3D porous SiO2/nitrogen-doped carbon（NC）/Co-carbon nano tubes（CNTs） hetero ***,the hard template（SiO2nano spheres） contributes to 3D porous structure,increases the specific surface area,and promotes the contact area of the *** the same time,the soft template（basic zinc carbonate） can control the growth of 1D CNTs and facilitate the exposure of the active ***,3D porous SiO2/NC/Co-CNTs hetero structure inherits highly dispersed Co nanoparticles coated by *** conductive channels and abundant N hetero atoms doping are reasonably constructed by a dual template ***,SiO2/NC/Co-CNTs catalyst provides an extraordinary activity for the OER in alkaline media,with a low overpotential of 298 mV at a current density of 10 mA·***,SiO2/NC/Co-CNTs hetero structure enables excellent long-term durability with a 10 mV decay in overpotential after 3000 cyclic voltammetry cycles,and 97% remain in current density over 20 *** is believed that this dual template strategy can provide a new and simple way to construct a highly dispersed active site in electrocatalysts.

关键词： Dual template High dispersion Porous heterostructure Conductive channels Oxygen evolution reaction

Frequency-Self-Adaptive Radio Frequency Power Harvester Enabled by Shape-Reconfigurable Liquid Metal

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Electromagnetic Science 2024年第2期2卷 91-103页

作者： Cheng Zhang Yuchao Wang Zebin Zhu hai Lin Kun Wang Xintong Shi Yi Du Chaoyun Song long Ren Qiang Cheng Key Laboratory of Materials for High-Power Laser Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China College of Physical Science and Technology Central China Normal UniversityWuhan 430000China Center of Quantum and Matter Science and School of Physics Beihang UniversityBeijing 100191China department of engineering King’s College LondonLondon WC2R 2LSUK State Key Laboratory of Radio Frequency Heterogeneous Integration College of Electronics and Information EngineeringShenzhen UniversityShenzhen 518000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430000China State Key Laboratory of Millimeter Waves Southeast UniversityNanjing 210096China

Radio frequency(RF)energy harvester as an efficient tool for capturing and converting the flourishing ambient RF energy provides a promising solution for long-term powering the wireless sensor networks and the Internet of things(IoTs).However,the actual distribution of the environmental RF signals is dynamically frequency-dependent due to the diverse wireless terminals only interacting with specified *** take full advantage of the RF energy carrying this characteristic,an intelligent RF energy harvester is in demand to automatically sense the frequency information of an incident signal and conduct the corresponding RF-to-direct current transformation ***,to the best of my knowledge,a frequency-self-adaptive RF harvester is first presented with the help of the shape-reconfigurable liquid metal,which can precisely identify and efficiently convert an arbitrary signal from the frequency span of 1.8 to 2.6 *** with a microcontroller unit and a tensile system,the dynamic functionality of the entire system is comprehensively demonstrated,showing promising potential to significantly advance various fields,including sustainable IoT applications,green wearable technologies,and self-powered devices.

关键词： Liquid metal Radio frequency power harvesting Frequency-self-adaptive Broadband rectification

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薄板自由振动虚边界元解法

同济大学学报（自然科学版） 2001年第8期29卷 888-892页

作者：许强朱金龙赵智同济大学建筑工程系上海200092 同济大学工程力学与技术系上海200092 铁道部第三工程局华海工程公司上海201101

依据虚边界元法思想 ,提出了一种求解薄板自由振动问题的新算法 .通过采用薄板弯曲问题的静力基本解建立了薄板自由振动问题的虚边界积分方程 ,及满足边界条件和域内点动力位移方程 ,将薄板自由振动问题转变为代数特征值问题 ,可直接求... 详细信息

依据虚边界元法思想 ,提出了一种求解薄板自由振动问题的新算法 .通过采用薄板弯曲问题的静力基本解建立了薄板自由振动问题的虚边界积分方程 ,及满足边界条件和域内点动力位移方程 ,将薄板自由振动问题转变为代数特征值问题 ,可直接求解 .与边界元直接法相比 ,本方法无需处理奇异积分 ,避免了“边界层效应” ,而且思想简单 ,计算省时、方便 .

关键词：虚边界元法自振频率静力基本解自由振动薄板

Exact Solution to(1+1)-Dimensional Higher-Order SchrSdinger Equation via an Extended Mapping Approach

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Communications in Theoretical Physics 2006年第1期45卷 127-130页

作者： ZHU hai-Ping~1 ZHENG Chun-long~(1,2,+) FANG Jian-Ping~11 department of Physics,Zhejiang Lishui university,Lishui 323000,china2 Shanghai Institute of Applied Mathematics and mechanics,Shanghai university,Shanghai 200072,china

Starting from a special variable transformation and with the help of an extended mapping approach,the high-order Schr■dinger equation(n=3,4)is solved.A new family of variable separation solutions with arbitraryfuncti... 详细信息

关键词： extended mapping approach Schr■dinger equation exact solution

Intelligent optimization of the structure of the large section highway tunnel based on improved immune genetic algorithm

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Journal of Pharmaceutical Analysis 2009年第3期21卷 163-166页

作者： hai-tao Bo1,Xiao-feng Jia2,Xiao-rui Wang11.School of Civil engineering and mechanics,Huazhong university of Science and Technology, Wuhan 430074 2.department of Chemistry and Bioengineering,Nanyang Institute of Technology,Nanyang 473004,china. School of Civil engineering and mechanics Huazhong University of Science and Technology Wuhan 430074 China department of Chemistry and Bioengineering Nanyang Institute of Technology Nanyang 473004 China

As in the building of deep buried long tunnels,there are complicated conditions such as great deformation,high stress,multi-variables,high non-linearity and so on,the algorithm for structure optimization and its application in tunnel engineering are still in the starting stage. Along with the rapid development of highways across the country,it has become a very urgent task to be tackled to carry out the optimization design of the structure of the section of the tunnel to lessen excavation workload and to reinforce the support. Artificial intelligence demonstrates an extremely strong capability of identifying,expressing and disposing such kind of multiple variables and complicated non-linear relations. In this paper,a comprehensive consideration of the strategy of the selection and updating of the concentration and adaptability of the immune algorithm is made to replace the selection mode in the original genetic algorithm which depends simply on the adaptability value. Such an algorithm has the advantages of both the immune algorithm and the genetic algorithm,thus serving the purpose of not only enhancing the individual adaptability but maintaining the individual diversity as well. By use of the identifying function of the antigen memory,the global search capability of the immune genetic algorithm is raised,thereby avoiding the occurrence of the premature phenomenon. By optimizing the structure of the section of the Huayuan tunnel,the current excavation area and support design are adjusted. A conclusion with applicable value is arrived at. At a higher computational speed and a higher efficiency,the current method is verified to have advantages in the optimization computation of the tunnel project. This also suggests that the application of the immune genetic algorithm has a practical significance to the stability assessment and informationization design of the wall rock of the tunnel.

关键词： immune genetic algorithm tunnel super-large section optimization

纳米单晶与多晶铜薄膜力学行为的数值模拟研究

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物理学报 2004年第11期53卷 3637-3643页

作者：徐洲王秀喜梁海弋吴恒安中国科学院材料力学行为和设计重点实验室合肥230026 中国科学技术大学力学和机械工程系合肥230026

通过对不同温度下单晶薄膜的拉伸性能的分子动力学模拟 ,从微观角度揭示了温度效应对材料性能的影响 .结果表明温度效应对材料的变形机理影响很大 .0K温度下由于缺乏热激活软化的影响 ,粒子运动所受到的阻碍较大 ,薄膜的强度较高 ,塑性... 详细信息

通过对不同温度下单晶薄膜的拉伸性能的分子动力学模拟 ,从微观角度揭示了温度效应对材料性能的影响 .结果表明温度效应对材料的变形机理影响很大 .0K温度下由于缺乏热激活软化的影响 ,粒子运动所受到的阻碍较大 ,薄膜的强度较高 ,塑性变形主要来自于粒子的短程滑移 .温度升高 ,粒子的热运动加剧 ,屈服强度降低 ,塑性变形将主要来自于大范围的位错长程扩展 .多晶薄膜的模拟结果表明 ,虽然其晶粒形状较为特殊 ,但是它仍然遵循反Hall Petch关系 .在模拟过程中 ,侧向应力最大值比拉伸方向应力的最大值滞后出现 .位错只会从晶界产生并向晶粒内部传播。

关键词：粒子运动铜薄膜位错最大值单晶薄膜分子动力学模拟温度效应塑性变形晶界力学行为

The circuit design and optimization of quantum multiplier and divider

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Science china(Physics,mechanics & Astronomy) 2022年第6期65卷 11-25页

作者： hai-Sheng Li Ping Fan haiying Xia Gui-Lu long College of Electronic engineering Guangxi Normal UniversityGuilin 541004China College of Information engineering East China JiaoTong UniversityNanchang 330013China department of Physics Tsinghua UniversityBeijing 100084China State Key Laboratory of Low-Dimensional Quantum Physics Tsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and Technology Beijing 100084China Beijing Academy of Quantum Information sciences Beijing 100193China

A fault-tolerant circuit is required for robust quantum computing in the presence of ***+T circuits are widely used in fault-tolerant *** a result,reducing T-depth,T-count,and circuit width has emerged as important optimization goals.A measure-and-fixup approach yields the best T-count for arithmetic operations,but it requires quantum *** paper proposes approximate Toffoli,TR,Peres,and Fredkin gates with optimized T-depth and *** that,we implement basic arithmetic operations such as quantum modular adder and subtractor using approximate gates that do not require quantum ***,taking into account the circuit width,T-depth,and T-count,we design and optimize the circuits of two multipliers and a *** to the comparative analysis,the proposed multiplier and divider circuits have lower circuit width,T-depth,and T-count than the current works that do not use the measure-and-fixup ***,the proposed second multiplier produces approximately 77%T-depth,60%T-count,and 25%width reductions when compared to the existing multipliers without quantum measurements.

关键词： quantum multiplier quantum divider quantum fault-tolerant circuit quantum computing

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基于物联网的水灾预警系统在水利中的应用

价值工程 2024年第4期43卷 124-127页

作者：任海龙陶开云云南工商学院昆明651700 云南大学滇池学院昆明651700

随着全球气候变化的加剧,水灾成为了一个全球性的问题。为了减少水灾对人类生命和财产造成的损失,水利部门需要采取有效的措施来预防和应对水灾。本论文将介绍一种基于物联网的水灾预警系统,并探讨其在水利中的应用。该系统利用物联网技... 详细信息

随着全球气候变化的加剧,水灾成为了一个全球性的问题。为了减少水灾对人类生命和财产造成的损失,水利部门需要采取有效的措施来预防和应对水灾。本论文将介绍一种基于物联网的水灾预警系统,并探讨其在水利中的应用。该系统利用物联网技术,通过传感器和通信设备实时监测水位、降雨量等数据,利用视觉系统实时监测水域情况,并将数据传输到中心服务器进行分析和处理。通过分析数据,发现传感器与视觉系统的综合应用能够使得监测系统提前预警水灾,并及时采取措施来减少损失。本论文将详细介绍该系统的工作原理、技术实现和应用效果,并讨论其在水利中的潜在应用价值。

关键词：物联网水灾预警系统水利传感器

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Experimental Study on the Influence of Cross-Section Type of Marine Cable Conductors on the Bending Performance

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china Ocean engineering 2022年第4期36卷 629-637页

作者： YAN Jun HU hai-tao LU hai-long YIN Yuan-chao BU Yu-feng LU Qing-zhen State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering MechanicsInter-national Research Center for Computational MechanicsDalian University of TechnologyDalian 116024China Ningbo Research Institute of Dalian university of Technology Ningbo 315016China State Key Laboratory of Structural Analysis for Industrial Equipment School of Ocean Science and TechnologyDalian University of TechnologyPanjin 124221China

Through the development of marine energy,marine cables are the key equipment for transmission of electrical energy between surface platforms and underwater *** failure is a critical failure mode of marine *** bending performance of the cable conductor has a major influence on both bending and fatigue performances of the overall cable *** study the influence of different types of the conductor cross-section on the bending performances of marine cable conductors,three types of copper conductors with the same cross-sectional area,i.e.,noncompressed round,compressed round,and shaped wire conductors,were *** experimental results demonstrated that the cross-section type significantly affects the bending performances of copper *** particular,the bending stiffness of the shaped wire conductor is the highest among the three conductor *** key evaluation parameters,i.e.,the bending stiffness,maximum bending moment,envelope area,and engineering critical slip point,were selected to compare and analyze the bending hysteresis curves of the three copper *** differences in the key evaluation parameters were analyzed based on the structural dimensional parameters,processing methods,and classical bending stiffness theoretical models of the three copper conductor *** results provide an important theoretical guidance for the structural design and engineering applications of marine cable conductors.

关键词： marine cable conductors cross-section type bending performance theoretical model bending test