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Proposal of a novel peeling of nano-particle (PNP) process for localized material removal on a hard material surface by controllable magnetic fields 22

Proposal of a novel peeling of nano-particle (PNP) process f...

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22nd International Conference of the European Society for Precision engineering and Nanotechnology, EUSPEN 2022

作者： Permpatdechakul, Thitipat Khajornrungruang, Panart Suzuki, Keisuke Kutomi, Shotaro Graduate School of Computer Science and System Engineering Mechanical Information Science and Technology Course Kyushu Institute of Technology Fukuoka Japan Department of Intelligent and Control Systems Avanced Mechanical Division Kyushu Institute of Technology Fukuoka Japan School of Computer Science and System Engineering Advanced Mechanical Course Kyushu Institute of Technology Fukuoka Japan

ISBN: (纸本)9781998999118

This article proposes a novel Peeling of Nano-Particle (PNP) process to locally remove material on a hard material surface using controllable magnetic fields. Fe3O4 particles in the size range of 50-100 nm in aqueous solution (pH value 11 adjusted by KOH) were magnetically controlled to adhere and remove from a 4H-SiC surface by two electromagnetic coils, which were sandwiched between the substrate. The particle controlling phenomenon on the surface was experimentally observed and verified by our developed apparatus applying an evanescent field. According to the results, particles could be controlled to approach and remove from the substrate surface with 12mT of magnetic field at the selective area on the substrate surface to realise the proposed PNP process. © European Society for Precision engineering and Nanotechnology, Conference Proceedings - 22nd International Conference and Exhibition, EUSPEN 2022. All rights reserved.

关键词： Magnetic fields

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Boron cluster-based TADF emitter via through-space charge transfer enabling efficient orange-red electroluminesce

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Chinese Chemical Letters 2025年第3期36卷 232-238页

作者： Xiao Yu Dongyue Cui Mengmeng Wang Zhaojin Wang Mengzhu Wang Deshuang Tu Vladimir Bregadze Changsheng Lu Qiang Zhao Runfeng Chen Hong Yan State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Jiangsu National Synergistic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts&TelecommunicationsNanjing 210023China Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of TechnologyYancheng 224051China College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts&TelecommunicationsNanjing 210023China A.N.Nesmeyanov Institute of Organoelement Compounds(INEOS) Russian Academy of SciencesMoscow 119991Russia

Thermally activated delayed fluorescence(TADF)materials driven by a through-space charge transfer(TSCT)mechanism have garnered wide ***,access of TSCT-TADF molecules with longwavelength emission remains a formidable *** this study,we introduce a novel V-type DA-D-A’emitter,Trz-mCzCbCz,by using a carborane *** design strategically incorporates carbazole(Cz)and 2,4,6-triphenyl-1,3,5-triazine(Trz)as donor and acceptor moieties,*** calculations alongside experimental validations affirm the typical TSCT-TADF characteristics of this *** to the unique structural and electronic attributes of carboranes,Trz-mCzCbCz exhibits an orange-red emission,markedly diverging from the traditional blue-to-green emissions observed in classical Cz and Trz-based TADF ***,bright emission in aggregates was observed for Trz-mCzCbCz with absolute photoluminescence quantum yield(PLQY)of up to 88.8%.As such,we have successfully fabricated five organic light-emitting diodes(OLEDs)by utilizing Trz-mCzCbCz as the emitting *** is important to note that both the reverse intersystem crossing process and the TADF properties are profoundly influenced by host *** fabricated OLED devices reached a maximum external quantum efficiency(EQE)of 12.7%,with an emission peak at 592 *** represents the highest recorded efficiency for TSCT-TADF OLEDs employing carborane derivatives as emitting layers.

关键词： Thermally activated delayed fluorescence Through-space charge transfer Carborane Boron clusters Organic light-emitting diodes

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A Topology Design Method for Satellite Networks based on Deep Reinforcement Learning 8

A Topology Design Method for Satellite Networks based on Dee...

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8th International Conference on Electronic technology and information Science, ICETIS 2023

作者： Zheng, Yuning Lyu, Yifeng Wang, Ying Sui, Xiufeng Zhu, Liyue Xu, Shubin School of Information and Electronics Beijing Institute of Technology Beijing China Institute of Spacecraft System Engineering China Academy of Broadcasting Science SAPPRFT China CETC Advanced Mobile Communication Innovation Centre China

ISBN: (纸本)9781510666535

Recently, Low Earth Orbit (LEO) satellite constellations with low-latency and high-bandwidth attract extensive research. However, most available studies focused on the field of satellite network routing algorithms, ignoring the impact of topology on the efficiency of inter-satellite networking and the quality of inter-satellite communication. In this paper, we propose a satellite network topology design method based on deep reinforcement learning (DRL), with the goal of reducing the latency of the entire satellite network. To achieve this goal, we first model the satellite network communication scene and formulate the topology optimization problem as a Markov decision process (MDP). Then, we further propose the idea of backbone-point satellites and use DRL to optimize the topology structure. Finally, we conduct extensive experiments on different performances of satellite topology, and we conclude that the network topology constructed in this way can provide lower latency communications than the motif and +Grid topologies, optimized by 8.48% and 42.86% respectively. © 2023 SPIE.

关键词： Reinforcement learning

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Plant Health Prediction Using RGB-D Method and VGG16 Model

Plant Health Prediction Using RGB-D Method and VGG16 Model

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Data engineering and Communication systems (ICDECS), International Conference on

作者： Shivansh Tiwari Shyant Raj Chaudhary Prashant Pal Shashank Kumar Singh Saurabh Bansod National Institute of Electronics and Information Technology Aurangabad B.Tech (Electronic System Engineering) National Institute of Electronics and Information Technology Aurangabad Scientist‘B’ National Institute of Electronics and Information Technology Aurangabad Scientist‘C’

Traditional plant disease detection methods rely on human expert visual inspection, which can be time-consuming and subjective. As a result, automated and objective methods for detecting plant health and disease are required. In this study, we offer a unique method for detecting plant health utilising RGB-D pictures and the VGG16 architecture. Plant health detection is a critical component of precision agriculture, which seeks to monitor and manage plants in an efficient and sustainable manner. In terms of precision and efficiency, our method exceeds previous solutions. On the validation set, our model achieves an accuracy of 98.9%, which is much greater than the accuracy of previous approaches. Moreover, in contrast to current approaches, our technique necessitates reduced computational resources and training/prediction time. Finally, utilising RGBD pictures and deep learning algorithms, we suggest a viable solution to the difficulty of plant health identification. Our method can give precise and timely information regarding plant health status, which can help to improve agricultural efficiency and sustainability.

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Electromagnetic Characteriation of STT-MRAM 7

Electromagnetic Characteriation of STT-MRAM

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7th IEEE International Symposium on Electromagnetic Compatibility, ISEMC 2023

作者： Zhang, Yiming Gao, Zhenbin Wu, Jianfei Lu, Yanfang Li, Yang Zhang, Hongli School of Electronics and Information Engineering Hebei University of Technology Tianjin China College of Electronic Science National University of Defense Technology Changsha China Tianjin Institute of Advanced Technology Tianjin China

ISBN: (纸本)9798350333107

This study delves into the electromagnetic attributes of STT-MRAM, emphasizing the implications of its intrinsic chip architecture on both its emission and immunity properties. We embarked on an exhaustive exploration and validation of STT-MRAM's radiated electromagnetic emissions, conducted emissions, and conducted immunity. The findings underscore that diverse operational modes and package features wield substantial influence on the electromagnetic behavior of STT-MRAM. © 2023 IEEE.

关键词： Electromagnetic compatibility

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Design of an Arc-shaped Balanced CRLH Waveguide for a Microwave Snow Melting system

Design of an Arc-shaped Balanced CRLH Waveguide for a Microw...

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Asia-Pacific Conference on Microwave

作者： Keto Togawa Takeo Kobashi Tsunayuki Yamamoto Advanced Electronics and Information System Engineering Course National Institute of Technology Tsuyama College Tsuyama-shi Japan Department of Integrated Science and Technology National Institute of Technology Tsuyama College Tsuyama-shi Japan

In this paper, an arc-shaped balanced CRLH waveguide for a microwave snow melting system is designed and simulated by an electromagnetic simulator. A balanced frequency of the waveguide is obtained at 2.45 GHz. The frequency is selected as an operating frequency of a snow melting system. Designed arc-shaped balanced CRLH waveguide is sandwiched with two straight-shaped balanced CRLH waveguides, and an electric field distribution in the waveguides is simulated. Observed E-field shows a propagating electromagnetic wave with very long wavelength, and zeroth-order resonance or quasi zeroth-order resonance phenomenon can be obtained at 2.45 GHz.

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Unequally-Spaced PAM-4 Enabled Power Budget Enhancement of UDWDM-PON Utilizing Simplified Coherent Receiver

Unequally-Spaced PAM-4 Enabled Power Budget Enhancement of U...

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2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Zhou, Jiajun Chen, Junda Wang, Hongli Fu, Songnian Tang, Ming Hubei Jiufengshan Laboratory Wuhan China National Engineering Laboratory for Next Generation Internet Access System Wuhan China Guangdong University of Technology Engineering Guangdong University of Technology Institute of Advanced Photonics Technology School of Information Engineering Guangzhou China

ISBN: (纸本)9798350312614

We numerically investigate a 4×10 Gb/s cost-effective coherent ultra-dense wavelength division multiplexing passive optical network (UDWDM-PON) by the use of unequally-spaced 4-level pulse-amplitude modulation (UES-PAM-4) signal based on gradient descent algorithm. According to the simulation results, a receiver sensitivity of -35.2 dBm for a single wavelength at the bit-error ratio (BER) of 3.8×10-3 is obtained. Compared with the conventional equally-spaced PAM-4 (ES-PAM-4) signal, a 2.5 dB receiver sensitivity enhancement can be secured after 20-km standard single-mode fiber (SSMF) transmission. Meanwhile, the UES-PAM-4 signal is numerically verified for 4×10 Gb/s UDWDM-PON. An average receiver sensitivity of -37.5 dBm and a power budget of 38.5 dB are obtained after the 20-km SSMF transmission. The proposed UES- PAM -4 scheme with the receiver sensitivity enhancement is a promising candidate for the UDWDM-PON in the existing optical distribution network (ODN). © 2023 IEEE.

关键词： gradient descent algorithm PAM-4 passive optical network power budget simplified coherent receiver

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Research on Metamaterial technology for Microwave Wireless Power Transfer

Research on Metamaterial Technology for Microwave Wireless P...

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International Symposium on Antennas and Propagation (ISAP)

作者： Tsunayuki Yamamoto Takeo Kobashi Tamami Maruyama Department of Integrated Science and Technology National Institute of Technology Tsuyama College Tsuyama-shi Japan Advanced Electronics and Information System Engineering Course National Institute of Technology Tsuyama College Tsuyama-shi Japan Department of Production Systems Engineering Institute of Technology Hakodate College Hakodate-shi Japan

ISBN: (数字)9798350364774

ISBN: (纸本)9798350364781

In this paper, two technologies of metamaterial for microwave wireless power transfer are shown. One is a zeroth-order resonance for a microwave snow melting system, and another one is a focusing reflector for realizing of a highly efficient wireless power transfer space. A zeroth-order resonance leads a uniformed microwave heating and a flexibility of feeding in a snow melting system. Focusing reflector can make some electromagnetic hot and null points in a space. These are expected to be required technologies for highly efficient wireless power transfer.

关键词： Microwave antennas Microwave technology Electromagnetic heating Snow Focusing Wireless power transfer Resonance Metamaterials Electromagnetics Microwave propagation

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Flash‑Induced High‑Throughput Porous Graphene via Synergistic Photo‑Effects for Electromagnetic Interference Shielding

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Nano-Micro Letters 2023年第11期15卷 1-18页

作者： Jin Soo Lee Jeong‑Wook Kim Jae Hee Lee Yong Koo Son Young Bin Kim Kyoohee Woo Chanhee Lee Il‑Doo Kim Jae Young Seok Jong Won Yu Jung Hwan Park Keon Jae Lee Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology(KAIST)291 Daehak‑roYuseong‑guDaejeon 34141Republic of Korea School of Electrical Engineering Korea Advanced Institute of Science and Technology(KAIST)291 Daehak‑roYuseong‑guDaejeon 34141Republic of Korea Department of Printed Electronics Nano‑Convergence Manufacturing Systems Research DivisionKorea Institute of Machinery and Materials(KIMM)156 Gajeongbuk‑RoYuseong‑GuDaejeon 34103Republic of Korea Department of Mechanical System Design Engineering Seoul National University of Science and Technology232 Gongneung‑roNowon‑guSeoul 01811Republic of Korea Department of Mechanical Engineering(Department of Aeronautics Mechanical and Electronic Convergence Engineering)Kumoh National Institute of Technology61 Daehak‑roGumiGyeongbuk 39177Republic of Korea

Porous 2D materials with high conductivity and large surface area have been proposed for potential electromagnetic interference(EMI)shielding materials in future mobility and wearable applications to prevent signal noise,transmission inaccuracy,system malfunction,and health ***,we report on the synthesis of lightweight and flexible flash-induced porous graphene(FPG)with excellent EMI shielding *** broad spectrum of pulsed flashlight induces photo-chemical and photo-thermal reactions in polyimide films,forming 5×10 cm^(2)-size porous graphene with a hollow pillar structure in a few *** resulting material demonstrated low density(0.0354 g cm^(−3))and outstanding absolute EMI shielding effectiveness of 1.12×10^(5) dB cm^(2) g^(−1).The FPG was characterized via thorough material analyses,and its mechanical durability and flexibility were confirmed by a bending cycle ***,the FPG was utilized in drone and wearable applications,showing effective EMI shielding performance for internal/external EMI in a drone radar system and reducing the specific absorption rate in the human body.

关键词： Porous graphene Flash lamp Photo-pyrolysis High-throughput Electromagnetic interference shielding

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Wearable Braille Reader 10

Wearable Braille Reader

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10th IEEE Global Conference on Consumer electronics, GCCE 2021

作者： Haga, Nanami Ito, Shoichi National Institute of Technology Nagano College Advanced Course of Electric And Information System Nagano Japan

ISBN: (纸本)9781665436762

In the 21st century, as the idea of supporting people with disabilities becomes more widespread in society, Braille is becoming more and more widely used, especially in public facilities. It is, however, inferred that about 90% of visually impaired people in Japan cannot read Braille. If some devices help them to read Braille easily, the device will improve their quality of life. We are developing a new wearable device that enables visually impaired people to read Braille with their fingers. Users of this device attach a pressure sensor to their fingertips. Users trace the Braille text with the sensor, the system reads out the translated texts with a voice. Unfortunately, the sensor is not small enough to attach to fingertips in our current system. We report on the current state of wearable Braille reader. © 2021 IEEE.

关键词： Pressure sensors Wearable computers Conferences Fingers Consumer electronics

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