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8th Symposium on Novel Photoelectronic Detection technology and Applications

作者： Zhang, Shengli Sun, Qian Zhang, Meng Zeng, Hang Wang, Shuming School of Physics BeiJing Institute of Technology BeiJing100085 China Beijing Institute of Space Mechanics Electricity Beijing100094 China Beijing Key Laboratory of Advanced Optical Remote Sensing Technology Beijing100094 China National Laboratory of Solid State Microstruct NanJing University Jiangsu NanJing210093 China

ISBN: (数字)9781510653122

ISBN: (纸本)9781510653115

Quantum Illumination is a powerful tool for detecting a weakly-reflective target embedded in noise environment. Up to now, all quantum illumination techniques have been investigated in free-space scenario. Thus, it is still an open and interesting question whether quantum illumination could be applied to underwater target detection. Here, by using quantum entanglement generated by spontaneous parametric down conversion and joint quantum measurement of returned signal mode and idler mode, we construct a model of underwater target detection with quantum illumination technique. Further, we apply a set of typical experimental parameter and show that a 10-dB enhancement in the detection of a target embedded in 30-meter water can be observed. This work shows the potential applicability of quantum information technology in future underwater target detection. © 2022 SPIE

关键词： Quantum entanglement

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Study on performance evaluation of 2×2 annular fuel with spacer grid in PWR 20

Study on performance evaluation of 2×2 annular fuel with sp...

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20th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2023

作者： Wang, Sipeng Li, Zhuoyao Yang, Bao-Wen Department of Nuclear Science and Technology Nanjing University of Aeronautics and Astronautics JiangSu Nanjing211106 China Key Laboratory of Nuclear Technology Application and Radiation Protection in Astronautics Nanjing University of Aeronautics and Astronautics Ministry of Industry China DEQD Institute for Advanced Research in Multiphase Flow and Energy Transfer No. 1 HuiYing Road Shandong Qingdao Jiaozhou266300 China

ISBN: (纸本)9780894487934

The performance of fuel elements is crucial to the safety and economy of a nuclear reactor, with the annular fuel offering the potential for improved safety and increased core power density compared to traditional rod fuel. However, the unique shape of annular fuel presents new challenges for the thermal hydraulic performance of the grid spacer. This study presents a 2×2 annular fuel bundle channel model with a spacer grid, proposes a performance evaluation factor for the positioning grid, and establishes a method and index for evaluating grid performance. Numerical simulations of the 2×2 annular fuel bundle channel under various working conditions are conducted, and the established evaluation factors are utilized to evaluate the thermal and hydraulic performance of the annular fuel bundle channel with spacer grid under different operating conditions. © 2023 Proceedings of the 20th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2023. All rights reserved.

关键词： Pressurized water reactors

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An Efficient Boron Source Activation Strategy for the Low‑Temperature Synthesis of Boron Nitride Nanotubes

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Nano-Micro Letters 2025年第1期17卷 548-558页

作者： Ying Wang Kai Zhang Liping Ding Liyun Wu Songfeng E Qian He Nanyang Wang Hui Zuo Zhengyang Zhou Feng Ding Yue Hu Jin Zhang Yagang Yao National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional Materialsand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093People’s Republic of China School of Electronic Information and Artificial Intelligence Shaanxi University of Science&TechnologyXian 710000People’s Republic of China College of Bioresources Chemical and Materials Engineering Shaanxi University of Science&TechnologyXian 710000People’s Republic of China Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325000People’s Republic of China Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518000People’s Republic of China College of Chemical and Molecular Engineering Peking UniversityBeijing 100871People’s Republic of China

Lowering the synthesis temperature of boron nitride nanotubes(BNNTs)is crucial for their *** primary reason for adopting a high temperature is to enable the effective activation of highmelting-point solid *** this study,we developed a novel approach for efficiently activating boron by introducing alkali metal compounds into the conventional MgO–B *** approach can be adopted to form various low-melting-point AM–Mg–B–O growth *** growth systems have improved catalytic capability and reactivity even under low-temperature conditions,facilitating the synthesis of BNNTs at temperatures as low as 850℃.In addition,molecular dynamics simulations based on density functional theory theoretically demonstrate that the systems maintain a liquid state at low temperatures and interact with N atoms to form BN *** findings offer novel insights into the design of boron activation and are expected to facilitate research on the low-temperature synthesis of BNNTs.

关键词： Boron nitride nanotubes Low-temperature Boron activation Density functional theory

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Pd-Ni-P非晶合金多形性转变的成分依赖性

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中国科学：材料科学（英文版） 2023年第11期66卷 4189-4196页

作者：杜清刘雄军曹一欢曾桥石王辉吴渊蒋虽合张晓宾吕昭平 Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China Center for High Pressure Science and Technology Advanced Research Shanghai 201203 China Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and Engineering Southeast University Nanjing 211189 China

非晶合金复杂的化学成分特征为理解多形性转变带来了巨大挑战.在本文中,我们系统研究了(PdNi)100-xPx(15 at％＜x＜21 at％)非晶合金中加热诱导多形性转变的化学成分依赖性.差热分析与结构因子的演化规律表明重入型玻璃转变会随着P含量... 详细信息

非晶合金复杂的化学成分特征为理解多形性转变带来了巨大挑战.在本文中,我们系统研究了(PdNi)100-xPx(15 at％＜x＜21 at％)非晶合金中加热诱导多形性转变的化学成分依赖性.差热分析与结构因子的演化规律表明重入型玻璃转变会随着P含量的增加(不超过17 at％)而逐渐被抑制,扩展X射线吸收精细结构分析拟合后的结构参数与原位升温同步辐射结果显示重入型玻璃转变的成分依赖性来源于金属-类金属键对(即Pd/Ni-P对)的成键能力差异以及由此导致的短程至中程有序化转变.这种成分依赖性可以导致重入型液-液转变和玻璃转变在Pd41.5Ni41.5P17非晶合金中均可发生.本研究有助于加深对重入型玻璃转变原子机制的认识,同时澄清了对于Pd-Ni-P非晶合金体系中多形性转变结构起源的困惑.

关键词： metallic glass compositional dependence glass transition in-situ synchrotron X-ray scattering extended X-ray absorption fine structure

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Crack-based and Hair-like Sensors Inspired from Arthropods:A Review

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Journal of Bionic Engineering 2020年第5期17卷 867-898页

作者： Changchao Zhang Junqiu Zhang Daobing Chen Xiancun Meng Linpeng Liu Kejun Wang Zhibin Jiao Tao Sun Dakai Wang Shichao Niu Zhiwu Han Luquan Ren Key Laboratory of Bionic Engineering(Ministry of Education China)Jilin UniversityChangchun 130022China State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130022China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Mechanical and Electric Engineering Jiangsu Provincial Key Laboratory of Advanced RoboticsSoochow UniversitySuzhou 215123China

Over a long period of time,arthropods evolve to have two excellent mechanical sensilla of slit sensilla and trichobothria sensilla,which construct a perfect perception *** former mainly perceives the change of the in-the-plane force while the latter perceives that of the out-of-plane *** recent years,these two sensilla have attracted researchers as the models for developing artificial mechanical *** review mainly includes the biomechanics and biomimetic manufacturing techniques as well as their future application *** order to better understand the advantages of biological strategies,this review describes the morphology,mechanical analysis,and information recognition of slit sensilla and trichobothria *** this review highlights the recent development of Crack-based Sensors(CBSs)and Hair-like Sensors(HLSs)based on the analysis of biological *** manufacturing method and substrate of crack in CBS and those of hair rods in HLS are discussed ***,the practical applications and potential value of two sensilla,such as flexible wearable electronic devices,robot sensing system,autopilot sensing and wind tunnel speed detection,are briefly discussed.

关键词： crack-based sensors hair-like sensors slit sensilla trichobothria sensilla bioinspiration

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WO_(3)@Fe_(2)O_(3) Core-Shell Heterojunction Photoanodes for Efficient Photoelectrochemical Water Splitting

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Chinese Journal of Structural Chemistry 2022年第8期41卷 25-30页

作者： Guobing Mao Heng Wu Tianyang Qiu Dingjie Bao Longjie Lai Wenguang Tu Qi Liu School of Materials Science and Engineering Anhui Polytechnic UniversityWuhuAnhui 241000China School of Mechanical Engineering Anhui Institute of Information TechnologyWuhuAnhui 241100China Key Laboratory of Modern Acoustics(MOE) Institute of AcousticsSchool of PhysicsEco-materials and Renewable Energy Research Center(ERERC)National Laboratory of Solid State MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresJiangsu Key Laboratory for Nano Tech-nologyNanjing UniversityNanjing 210093China School of Science and Engineering The Chinese University of Hong KongShenzhenGuangdong 518172China

Photoelectrochemical(PEC) hydrogen production from water splitting is a green technology to convert solar energy into renewable hydrogen fuel. The construction of host/guest architecture in semiconductor photoanodes has been proven to be an effective strategy to improve solar-to-fuel conversion efficiency. In this study, WO_(3)@Fe_(2)O_(3) core-shell nanoarray heterojunction photoanodes are synthesized from the in-situ decomposition of WO_(3)@Prussian blue(WO_(3)@PB) and then used as host/guest photoanodes for photoelectrochemical water splitting, during which Fe_(2)O_(3) serves as guest material to absorb visible solar light and WO_(3) can act as host scaffolds to collect electrons at the contact. The prepared WO_(3)@Fe_(2)O_(3) shows the enhanced photocurrent density of 1.26 m A cm^(-2)(under visible light) at 1.23 V. vs RHE and a superior IPEC of 24.4% at 350 nm, which is higher than that of WO_(3)@PB and pure WO_(3)(0.43 m A/cm^(-2) and 16.3%, 0.18 m A/cm^(-2) and 11.5%) respectively, owing to the efficient light-harvesting from Fe_(2)O_(3) and the enhanced electron-hole pairs separation from the formation of type-Ⅱ heterojunctions, and the direct and ordered charge transport channels from the one-dimensional(1D) WO_(3) nanoarray nanostructures. Therefore, this work provides an alternative insight into the construction of sustainable and cost-effective photoanodes to enhance the efficiency of the solar-driven water splitting.

关键词： host/guest photoelectrodes WO_(3) a-Fe_(2)O_(3) core-shell nanostructures one-dimensional nanoarray

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Fast-chargingand dendrite-free lithiummetal anodeeenabledby partial lithiation ofgraphene aerogel

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Nano Research 2022年第11期15卷 9792-9799页

作者： Yong Ma Yuting Gu Ying He Le Wei Yuebin Lian Weiyi Pan Xinjian Li Yanhui Su Yang Peng Zhao Deng Zhongfan Liu College of Energy Soochow Institute for Energy and Materials Innovations(SIEMIS)Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006China School of Photoelectric Engineering Changzhou institute of technologyChangzhou 213032China Beijing Graphene Institute(BGI) Beijing 100095China Center for Nanochemistry(CNC) College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

The development of deeply cyclable lithium metal batteries with fast-charging capability offers a promising solution to relieve the“range anxiety”in driving electric *** lithium metal anodes suffered from low operating current densities and shallow charge/discharge depths,owing to the intrinsic dendrite growth governed by Sand’s ***,we come up with a novel design of heavy-duty lithium metal anode fabricated by partially infusing the three-dimensional(3D)porous graphene aerogel with molten *** electroanalytical measurements and simulations show that the unique electrode architecture brings notable advantages in mediating smooth Li plating/stripping,including reduced local current density,inhibited dendrite growth,buffered volume fluctuation,as well as more efficient Li ***,a remarkable cycling performance in symmetric cells for over 400 cycles(800 h)with an ultrahigh cycling capacity of 15 mAh·cm^(−2) at 15 mA·cm^(−2) is achieved,which,to our best knowledge,has been never seen in ***4 full cells demonstrate a superb rate capability up to 10 C and a prolonged cycling of 1,600 cycles at 2 C with the per-cycle capacity decay of only 0.023%.This study paves the way for the ultimate deployment of lithium metal batteries in real-world applications that require fast charging and deep cycling.

关键词： graphene aerogel partial infusion fast-charging dendrite-free Li metal anodes

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In Situ Iodide Passivation Toward Efficient CsPbI_(3) Perovskite Quantum Dot Solar Cells

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Nano-Micro Letters 2023年第10期15卷 28-39页

作者： Junwei Shi Ben Cohen‑Kleinstein Xuliang Zhang Chenyu Zhao Yong Zhang Xufeng Ling Junjun Guo Doo‑Hyun Ko Baomin Xu Jianyu Yuan Wanli Ma Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow University199 Ren‑Ai RoadSuzhou Industrial ParkSuzhou 215123People’s Republic of China Department of Electrical and Computer Engineering University of British Columbia2329 West MallVancouverBC V6T 1Z4Canada Department of Chemistry Sungkyunkwan UniversitySuwon 16419Republic of Korea Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow University199 Ren‑Ai RoadSuzhou Industrial ParkSuzhou 215123People’s Republic of China Jiangsu Key Laboratory for Carbon‑Based Functional Materials&Devices Soochow University199 Ren‑Ai RoadSuzhou Industrial ParkSuzhou 215123People’s Republic of China

All-inorganic CsPbI_3 quantum dots(QDs) have demonstrated promising potential in photovoltaic(PV) applications. However, these colloidal perovskites are vulnerable to the deterioration of surface trap states, leading to a degradation in efficiency and stability. To address these issues, a facile yet effective strategy of introducing hydroiodic acid(HI) into the synthesis procedure is established to achieve high-quality QDs and devices. Through an in-depth experimental analysis, the introduction of HI was found to convert PbI_2 into highly coordinated [PbI_m]~(2-m), enabling control of the nucleation numbers and growth kinetics. Combined optical and structural investigations illustrate that such a synthesis technique is beneficial for achieving enhanced crystallinity and a reduced density of crystallographic defects. Finally, the effect of HI is further reflected on the PV performance. The optimal device demonstrated a significantly improved power conversion efficiency of 15.72% along with enhanced storage stability. This technique illuminates a novel and simple methodology to regulate the formed species during synthesis, shedding light on ofurther understanding solar cell performance, and aiding the design of future novel synthesis protocols for high-performance optoelectronic devices.

关键词： CsPbI_(3)perovskite quantum dots In situ passivation Surface trap states Perovskite solar cell

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Image Denoising of Fishing Nets Underwater with Range Selection Based on Convolutional Sparse Coding

Image Denoising of Fishing Nets Underwater with Range Select...

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Computer Engineering and Intelligent Communications (ISCEIC), International Symposium on

作者： Sheng Wu Chao Liu Honglei Zhang Enyue Duan Nian Jiang Yantai Research Institute Harbin Engineering University Jiangsu Key Laboratory of Function Control Technology for Advanced Materials Jiangsu Ocean University Jiangsu China Marine Photoelectric Imaging Project Team Shandong Aerospace electronic Technology Institute Shandong China

The underwater detection imaging technology mainly includes sonar imaging and underwater optical imaging. In order to overcome the disadvantages of low resolution of sonar imaging and short detection range of traditional optical imaging, optical gating technology is applied to underwater fishing net detection. This technology has higher resolution compared to sonar imaging, and its detection range has also been shown to be three times larger than that of conventional optical imaging. However, underwater range gating imaging can suffer from large random noise and low signal-to-noise ratio. In order to solve this problem, this paper proposes a convolutional sparse coding denoising neural network based on deep learning to improve image quality. This network consists of a local residual channel and a global convolutional sparse coding channel. Compared with DnCNN, ECNDNet and other methods, the average Peak signal-to-noise ratio of the proposed method is improved by 1.57~2.11dB, which can effectively remove random noise and reconstruct clear underwater fishing net range-gated images.

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Cam Profile Optimization for a Piezoelectric-Based Sole Energy Harvester

Cam Profile Optimization for a Piezoelectric-Based Sole Ener...

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IEEE International Conference on robotics and Biomimetics

作者： Haisu Liao Zhongliang Ren Yidi Wang Xinyu Wu Fei Gao Southern University of Science and Technology Shenzhen China Guangdong Provincial Key Laboratory of Robotics and Intelligent System Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen China Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen China

ISBN: (数字)9798331509644

ISBN: (纸本)9798331509651

Harvesting energy from the human body to extend the operational time for low-power has gained significant attention. Recently, researchers have focused on biomechanical energy harvesting from human feet while walking. This paper presents an optimization of the cam profile for a piezoelectric-based sole energy harvester designed to be worn on the bottom of shoes to power electronic devices. Specifically, cams with linear polynomial and exponential functions were designed to actuate the piezoelectric transducers (PZTs). Force analysis revealed that the exponential function cam induces more significant deformation in the PZTs than the linear polynomial cam. Preliminary tests on a healthy subject validated this design, showing that the exponential function cam produced an average output power of 0.16mW at a walking speed of 5.5 km/h, indicating a 78% improvement over the linear polynomial cam. Moreover, the optimization rate increased with the growing walking speed.

关键词： Legged locomotion Deformation Force Voltage Polynomials Energy harvesting Power generation Optimization Lead zirconate titanate Testing

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