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A 0.5–3.0 GHz SP4T rF switch with improved body self-biasing technique in 130-nm SOI CMOS

Journal of Semiconductors 2020年第10期41卷 63-69页

作者： Hao Zhang Qiangsheng Cui Xu Yan Jiahui Shi Fujiang Lin Micro-/Nano-Electronic System Integration R&D Center(MESIC) University of Science and Technology of China(USTC)Hefei 230026China Hengxin Semitech Co. Ltd.Suzhou 215123China Department of Electrical and Computer Engineering(ECE) National University of Singapore(NUS)Singapore 117583Singapore

A single-pole four-throw(SP4T)rF switch with charge-pump-based controller is designed and implemented in a commercial 130-nm silicon-on-insulator(SOI)CMOS *** improved body self-biasing technique based on diodes is utilized to simplify the controlling circuitry and improve the linearity.A multistack field-effect-transistor(FET)structure with body floating technique is employed to provide good power-handling *** proposed design demonstrates a measured input 0.1-d B compression point of 38.5 d Bm at 1.9 GHz,an insertion loss of 0.27 d B/0.33 d B and an isolation of 35 d B/27 d B at 900 MHz/1.9 GHz,*** overall chip area is only 0.49 mm^*** rF switch can be used in GSM/WCdMA/LTE frontend modules.

关键词： rF switch silicon-on-insulator body self-biasing technique multistack FETs

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The robot Path Planning Algorithm In Indoor Environment

The Robot Path Planning Algorithm In Indoor Environment

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Annual conference of Industrial Electronics Society

作者： Zhifeng Wang Heng Xie Zeqin Lin Tao Wen Chenglong Guo Haichu Chen School of mechanical and electrical engineering Foshan University Foshan China Technology R&D Center Foshan designa technology co. LTD Foshan China School of automation Foshan University Foshan China

ISBN: (数字)9781728154145

ISBN: (纸本)9781728154152

The sweeping robots used to clean the floor by random collision and infrared detection, which is inefficient and time-consuming. The path of those robots is disorder and some area may be cleaned for several times. due to the fact that the robot needs to avoid the obstacles on their path, it may cause low coverage problem. A elastic path planning algorithm based on U-shaped trajectory is designed to allow the robot to fit int the indoor environment. The robot can change the length of the trajectory to avoid collision. Instead of using obstacle-avoidance algorithm, a kind of smart algorithm is designed to recover the area that is left due to the obstacle-avoidance. In addition, to prevent the robot from cleaning the area that has been cleaned before, a mechanism is built to allow the robot to memory the cleaned area. In practice, after being tested by the experiments, the coverage rate of the robot can reach 94.61 %, which is more than the robots that use random cleaning mode, and the robot uses less electricity compared with the conventional ones.

关键词： robots robot sensing systems Switches Path planning Cleaning collision avoidance Infrared sensors

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real-Time rotated Object detection Using Angle decoupling

Real-Time Rotated Object Detection Using Angle Decoupling

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Chinese Automation congress (CAC)

作者： Zheng Wang Lei Shen Bin Li Jing Yang Fusen Yang Kun Yuan Chao Fang Yi Fanwang State Key Laboratory of Public Big Data(Guizhou University) R & D Center (Beijing Daheng Image Vision Co. Ltd.) Beijing China R&D Center (Beijing Daheng Image Vision Co. Ltd.) Beijing China Mechanical Engineering College GuiZhou University GuiYang China State Key Laboratory of Public Big Data(Guizhou University) School of Mechanical Engineering (Guizhou University) GuiYang China Beijing Daheng Image Vision Co. Ltd. Beijing China Key Laboratory of Advanced Manufactiring Technology of the Ministry of Education Guizhou University GuiYang China

ISBN: (纸本)9781665426480

real-time object detection and angle fitting of rotating objects in industrial scenes are challenging computer vision tasks at present. Current object-detection models in natural scenes cannot meet the needs of the industry for accurate angle fitting. Thus, we propose a rotating detection box representation based on angle information decoupling (rbbox), and designed rotated-YOLO (You Only Look Once) deep learning rotating object detection model for rbbox representation. First, an angle information encoding and decoding method is proposed by analyzing the problem of calculating angle error mutation in the existing angle information expression methods. Second, based on the YOLO series neural network model, the detection head and loss function are improved. Finally, the cosine similarity evaluation index was proposed to solve the problem in which intersection over union could not clearly express the accuracy of angle fitting in the object detection task in natural scenes. Experiments on industrial datasets show that the algorithm performs well on open-source industrial datasets. The average angle cosine similarity between rbbox and label box is 0.98781, and mAP@.5 is 0.995. The reasoning speed of NVIdIA A100 GPU is 76.923 fps, which can meet the needs of real-time reasoning in industry.

关键词： Industries computational modeling Fitting Neural networks Object detection real-time systems cognition

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research on coupling Vibration Mechanism Based on contact System

Research Square

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research Square 2020年

作者： Kepeng, Huang Fazhan, Wang Mingji, Zhao Baoliang, Guo daquan, Ou Mechanical and Electrical Engineering Xi’an University of Architecture & Technology Xi’an710055 China Technology R&D Center ABB Xin-hui Low-Voltage Switchgear Co. Ltd Jiangmen529000 China

Aiming at the problem of vibration and bounce caused by the collision and contact of the moving and static contacts of the electrical switching device during the closing process, based on the comprehensive consideration of the nonlinear electromagnetic force and the collision contact force, the two-degree-of-freedom coupled motion differential equation of the contact system is established, and to solve and experimental analysis. The theoretical and experimental results show that the contact has not separated after the collision, and the iron core has collided, which further intensifies the contact bounce;when the iron core bounces for the second time, it does not affect the bounce of the contact;the contactor is in operation In this case, the movement of the moving iron core will cause slight jitter of the system. The research results provide a theoretical basis for further control and reduction of contact bounce. © 2020, CC BY.

关键词： degrees of freedom (mechanics)

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An Adaptive Industrial robot Spraying Planning and control System

An Adaptive Industrial Robot Spraying Planning and Control S...

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Annual conference of Industrial Electronics Society

作者： Zhifeng Wang Zhiming Zhen Zeqin Lin Tao Wen Chenglong Guo Haichu Che School of mechanical and electrical engineering Foshan University Foshan China Technology R&D Center Foshan designa technology co. LTD Foshan China School of automation Foshan University Foshan China

ISBN: (数字)9781728154145

ISBN: (纸本)9781728154152

With the improvement of spraying technology and spraying quality requirements, the traditional manual spraying can no longer meet the needs of modern industrial development. Industrial robot automatic spraying technology has been rapidly applied in automobile and ceramic industry. However, due to the special structure of the spraying workpiece and the numerous and coupling process parameters, it is difficult to plan and control the spraying trajectory of the industrial robot. For this reason, an adaptive trajectory and process parameter planning and control method for industrial robots is very important. In order to make the robot spraying adapt to the structure irregular shape and small batch production mode, this system proposes a robot spraying adaptive generation intelligent spraying system based on robot recognition and paint closed-loop control technology. It solves the problems of long planning process and poor quality caused by the complex structure of the workpiece. At the same time, this paper proposes a closed-loop paint supply system based on variant PId, which improves the robot process planning and coating supply control level, making the spraying effect of industrial robots better.

关键词： Spraying Service robots Paints robot kinematics Painting Process control Adaptation models

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Infusing High-density Polyethylene with Graphene-Zinc Oxide to Produce Antibacterial Nanocomposites with Improved Properties

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Chinese Journal of Polymer Science 2020年第8期38卷 898-907,I0008页

作者： You-Li Yao Manuel reves de Guzman Hong duan Chen Gao Xu Lin Yi-Hua Wen Juan du Li Lin Jui-Chin Chen Chin-San Wu Maw-Cherng Suen Ya-Li Sun Wei-Song Hung Chi-Hui Tsou Material Corrosion and Protection Key Laboratory of Sichuan Province Sichuan University of Science and EngineeringZigong 643000China Department of Orthopedics West China School of Medicine/West China HospitalSichuan UniversityChengdu 610041China Department of Orthopedics Fourth People's Hospital of ZigongZigong 643000China Department of Materials and Textiles Oriental Institute of TechnologyNew Taipei City 22061China Department of Applied Cosmetology Kao Yuan UniversityKaohsiung 82101China Department of Fashion Business Administration Lee-Ming Institute of TechnologyNew Taipei City 24305China Graduate Institute of Applied Science and Technology Department of Materials Science and EngineeringNational Taiwan University of Science and TechnologyTaipei 10607China R&D Center for Membrane Technology Department of Chemical EngineeringChung Yuan UniversityChung-Li 32023China Sichuan Zhixiangyi Technology Co. Ltd.Chengdu 610051China Department of Materials Science Chulalongkorn UniversityBangkok 10330Thailand

Nanocomposites of high-density polyethylene(HdPE)modified with 0.2 phr graphene-zinc oxide(GN-ZnO)exhibited optimal mechanical properties and thermal *** other nano-materials—GN and nano-ZnO—were also used to compare them with *** the content of GN-ZnO gradually enhanced the antibacterial and barrier properties,but the addition of 0.3 phr GN-ZnO led to agglomeration that caused defects in the ***,we investigated the antibacterial and barrier properties of HdPE nanocomposites infused with different nanoparticles(GN,ZnO,GN-ZnO)of varying *** and the nanoparticles were meltblended together in a Haake-Buchler rheomixer to produce a new environment-friendly nano-material with improved physical and chemical *** following characterizations were conducted:tensile test,thermogravimetric analysis,morphology,differential scanning calorimetry,X-ray diffraction,antibacterial test,and oxygen and water vapor permeation *** results showed that the crystallinity of HdPE was affected with the addition of GN-ZnO,and the nanocomposites had effective antibacterial capacity,strong mechanical properties,high thermal stability,and excellent barrier *** type of HdPE nanocomposites reinforced with GN-ZnO would be attractive for packaging industries.

关键词： High-density polyethylene Zinc oxide Nanocomposite material Antibacterial properties Barrier performance

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A Paired Phase and Magnitude reconstruction for Advanced diffusion-Weighted Imaging

arXiv

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arXiv 2022年

作者： Qian, Chen Wang, Zi Zhang, Xinlin Shi, Boxuan Jiang, Boyu Tao, ran Li, Jing Ge, Yuwei Kang, Taishan Lin, Jianzhong Guo, di Qu, Xiaobo The Department of Electronic Science Biomedical Intelligent Cloud R&D Center Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance National Institute for Data Science in Health and Medicine Xiamen University China The United Imaging Healthcare Shanghai China Xingaoyi Medical Equipment Co. Ltd. Yuyao China Department of Radiology Zhongshan Hospital of Xiamen University School of Medicine Xiamen University Xiamen China The School of Computer and Information Engineering Xiamen University of Technology Xiamen China

Objective: Multi-shot interleaved echo planer imaging can obtain diffusion-weighted images (dWI) with high spatial resolution and low distortion, but suffers from ghost artifacts introduced by phase variations between shots. In this work, we aim at solving the challenging reconstructions under inter-shot motions between shots and a low signal-to-noise ratio. Methods: An explicit phase model with paired phase and magnitude priors is proposed to regularize the reconstruction (PAIr). The former prior is derived from the smoothness of the shot phase and enforced with low-rankness in the k-space domain. The latter explores similar edges among multi-b-value and multi-direction dWI with weighted total variation in the image domain. results: Extensive simulation and in vivo results show that PAIr can remove ghost artifacts very well under a high number of shots (8 shots) and significantly suppress the noise under the ultra-high b-value (4000 s/mm2). conclusion: The explicit phase model PAIr with complementary priors has a good performance on challenging reconstructions under inter-shot motions between shots and a low signal-to-noise ratio. Significance: PAIr has great potential in advanced clinical dWI applications and brain function research. copyright © 2022, The Authors. All rights reserved.

关键词： Clinical research

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High threshold voltage GaN HEMT with mixed conductive channel

High threshold voltage GaN HEMT with mixed conductive channe...

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International conference on (ICEPT) Electronic Packaging technology

作者： Wanjie Li Luqi Tao Liming Wang Xu Zhang Xiandong Li Xianping Chen School of Electrical Engineering Chongqing University Chongqing China Technology R&D Center China Resources Microelectronics (Chongqing) Co.Ltd Chongqing China College of Optoelectronic Engineering Chongqing University Chongqing China

ISBN: (数字)9781728168265

ISBN: (纸本)9781728168272

In recent years, wide-band-gap semiconductor materials silicon carbide (SiC) and gallium nitride (GaN) are receiving widespread attention because of their superior performance. In particular, GaN devices have been applied in the fields of low-voltage miniaturized power supplies and 5G communications. For GaN high electron mobility transistor (HEMT) devices used in miniaturized power supplies, the lower threshold voltage (V th ) is a problem that needs to be solved urgently. In this paper, the HEMT device having a novel mixed conducting channel. The device raises the threshold voltage to 3.21V while the saturation current capability still reached 0.46A/mm. As with conventional devices, the saturation current capability of the new device is affected by the Al composition of the barrier layer. But unlike conventional devices, the threshold voltage of the device can be adjusted by changing the doping concentration of the p-type doped layer within a certain range.

关键词： Gallium nitride Logic gates Threshold voltage doping HEMTs Aluminum gallium nitride Wide band gap semiconductors

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corrigendum to “Improvement of Ce–Nb doping on low-temperature catalytic activity of a VOx-based catalyst for NH 3 -SCr reaction” [Appl. Surf. Sci. 655 (2024) 159571]

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Applied Surface Science 2024年 662卷

作者： Min Gie Jung Hyo Jin An Jun Woo Jho Jung-Hyun Lee Heon Phil Ha Hwajun Lee dong Wook Kwon Extreme Materials Research Center Korea Institute of Science and Technology Seoul 02792 Republic of Korea Department of Chemical & Biological Engineering Korea University Seoul 02841 Republic of Korea R&D Support Group Central Research Center Hyundai Oilbank Co. Ltd. Yongin-si Gyeonggi-do 16891 Republic of Korea

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Surface color optimization of powder-based 3d objects based on impregnation process 35

Surface color optimization of powder-based 3D objects based ...

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35th International conference on digital Printing Technologies, NIP 2019

作者： Chen, Chen Wang, Xiaochun Guangxue, Chen Jiangping, Yuan YUTO R&D Institute Shenzhen YUTO Packaging Technology Co. Ltd. Shenzhen518108 China State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou510640 China

ISBN: (纸本)9780892083411

Poor surface color reproduction and incomplete color management system are the main impeding factors for the commercialization of full-color 3d printing. In this paper, the coloration mechanisms as well as characteristics of 3d surfaces were introduced, and a variety of impregnation methods suitable for powder-based 3d printing were integrated. The 24-color cards and four-primary cubes were printed by 3d Systems ProJet 860 Pro printer to compare single-plane and multi-plane optimization effects, choose the best impregnation process and put forward a guide to improve impregnants. The results revealed that the saturation of 3d printing surface color was greatly increased and the brightness was slightly decreased after impregnation process, which reduced chromatic aberration on single-plane or multi-plane. colorBond and transparent coating spray are the most suitable combination for powder-based 3d objects. Increasing the uniformity, transparency and permeability of coatings is beneficial to further optimize surface colors. © 2019 Society for Imaging Science and technology

关键词： color

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