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Giant 2d Skyrmion Topological Hall Effect with Ultrawide Temperature Window and Low-Current Manipulation in 2d room-Temperature Ferromagnetic Crystals

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Chinese Physics Letters 2023年第11期40卷 131-138页

作者：张高节罗清源文晓琨武浩杨丽靳雯李路吉张佳张文峰舒海波常海欣 State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan National High Magnetic Field Center and Institute for Quantum Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and TechnologyWuhan 430074China Shenzhen R&D Center of Huazhong University of Science and Technology Shenzhen 518000China

The discovery and manipulation of topological Hall effect(THE),an abnormal magnetoelectric response mostly related to the dzyaloshinskii–Moriya interaction(dMI),are promising for next-generation spintronic devices based on topological spin textures such as magnetic ***,most skyrmions and THE are stabilized in a narrow temperature window either below or over room temperature with high critical current *** is still elusive and challenging to achieve large THE with both wide temperature window till room temperature and low critical current ***,using controllable,naturally oxidized sub-20 and sub-10 nm 2d van der Waals room-temperature ferromagnetic Fe_(3)GaTe_(2-x)crystals,we report robust 2d skyrmion THE with ultrawide temperature window ranging in three orders of magnitude from 2 to 300 K,in combination with giant THE of~5.4μΩ·cm at 10 K and~0.15μΩ·cm at 300 K,which is 1–3 orders of magnitude larger than that of all known room-temperature 2d skyrmion ***,room-temperature current-controlled THE is also realized with a low critical current density of~6.2×10^(5)A·cm^(-2).First-principles calculations unveil natural oxidation-induced highly enhanced 2d interfacial dMI reasonable for robust giant *** work paves the way to room-temperature electrically controlled 2d THE-based practical spintronic devices.

关键词： topological manipulation magnetic

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Evaluation of Scaling Method for Frame reception Processing of Media Stream Using XdP/AF_XdP on Edge device

Evaluation of Scaling Method for Frame Reception Processing ...

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Consumer technology (ICCT-Pacific), International Conference on

作者： Yuto Hamaguchi Tatsuya Yamada Shingo Oidate Information Technology R&D Center Mitsubishi Electric Corporation Kamakura Japan

ISBN: (数字)9798331504120

ISBN: (纸本)9798331504137

In recent years, edge AI, which performs low-latency inference processing near IoT devices such as network cameras, has become increasingly popular among consumers. In the future, with improvements in network speed and inference processing throughput on edge devices, there will be a need for scalable processing capabilities throughout the entire frame processing pipeline, from media stream packet reception to inference processing. receive-Side Scaling (rSS) is commonly used as a method to scale the processing load of packet reception across multiple cores. However, since media such as video is often delivered as a single stream, packets cannot be distributed based on sessions like IP addresses or ports. Therefore, a mechanism is needed to distribute packets to each CPU core using other elements, such as frame numbers. recently, SmartNICs, which allow the implementation of custom logic to analyze packet content and distribute it to CPU cores, have become widely used. However, for edge devices processing specific streams, SmartNICs are often too costly and over-specification. This paper presents a low-cost and low-latency method for scaling frame reception processing for single-stream packet reception using Linux eXpress data Path (XdP) and the Address Family (AF_XdP). Our results indicate that while keeping the load of sequential processing constant, the overall load is reduced by 57% with 10 cores.

关键词： Performance evaluation Linux Pipelines Media Streaming media Throughput Software Logic Internet of Things Low latency communication

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A 0.9 to 4.0 GHz High Efficiency reactively-Matched GaN Power Amplifier MMIC

A 0.9 to 4.0 GHz High Efficiency Reactively-Matched GaN Powe...

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Microwave, MTT-S International Symposium

作者： J. Kamioka H. Sato S. Miwa Y. Kamo S. Shinjo Mitsubishi Electric Corporation Information Technology R&D Center Japan

ISBN: (数字)9798350375046

ISBN: (纸本)9798350375053

This paper reports on a design and measurement of a 0.9 to 4.0 GHz Gallium Nitride (GaN) power amplifier monolithic microwave integrated circuit (MMIC). High efficiency and high output power amplifier over a wide bandwidth are achieved by using a compact reactively-matched power amplifier configuration. Measurement results of the power amplifier show output power of 30.4 to 53.1 W, power added efficiency (PAE) of 37.5 to 67.0% over 0.9 to 4.0 GHz using a 30 V drain voltage with a chip size of 19.44 mm 2 under continuous wave condition. These results represent higher efficiency and output power in a compact size compared to the other reported amplifiers with similar bias conditions.

关键词： Semiconductor device measurement Voltage measurement Power measurement Power amplifiers Transmission line measurements Microwave circuits Size measurement

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Egocentric Action recognition in Machine Inspection

Egocentric Action Recognition in Machine Inspection

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International Conference on Autonomous robots and Agents, ICArA

作者： Keishi Nishikawa Takaya Taniguchi Koji Sakata Mitsubishi Electric Information Technology R&D Center Kanagawa Japan

ISBN: (数字)9798350394245

ISBN: (纸本)9798350394252

In this paper, a method for the egocentric action recognition in the machine inspection is proposed. Based on our observation, it is found that the actions in machine inspection relates to the position and motion of the hands in the egocentric view. Our method consists of the three steps: data preparation, pre-processing, and building model. In data preparation, the temporal sequence of the hand's joints is converted to the three-dimension tensor. In pre-processing, the data is standardized at each dimension by using the statistics of the converted data. In building model, the data is used for training the model which combines pre-trained convolutional neural network and a few fully connected layers. We designed a task simulating the machine inspection, and collected the egocentric view data of the subjects doing the task. The experimental results show that accuracy of the recognition by the proposed method reaches 76.6% at most.

关键词： Training Analytical models Tensors Automation Buildings Inspection data models

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Optimizing environmental insulation thickness of buildings with CHP-based district heating system based on amount of energy and energy grade

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Frontiers in Energy 2022年第4期16卷 613-628页

作者： Yumei ZHANG Pengfei JIE Chunhua LIU Jing LI School of Mechanical Engineering Beijing Institute of Petrochemical TechnologyBeijing 102617China Engineering and Technology R&D Center of Clean Air Conditioning in Colleges of Shandong Shandong Huayu University of TechnologyDezhou 253000China China Environmental Resources Technology Co. LtdBeijing 100012China

The increase of insulation thickness(IT)results in the decrease of the heat demand and heat medium temperature.A mathematical model on the optimum environmental insulation thickness(OEIT)for minimizing the annual total environmental impact was established based on the amount of energy and energy grade ***,a case study was conducted based on a residential community with a combined heat and power(CHP)-based district heating system(dHS)in Tianjin,***,the effect of IT on heat demand,heat medium temperature,exhaust heat,extracted heat,coal consumption,carbon dioxide(CO_(2))emissions and sulfur dioxide(SO_(2))emissions as well as the effect of three types of insulation materials(i.e.,expanded polystyrene,rock wool and glass wool)on the OEIT and minimum annual total environmental impact were *** results reveal that the optimization model can be used to determine the *** the OEIT of expanded polystyrene,rock wool and glass wool is used,the annual total environmental impact can be reduced by 84.563%,83.211%,and 86.104%,*** can be found that glass wool is more beneficial to the environment compared with expanded polystyrene and rock wool.

关键词： optimum environmental insulation thickness heat medium temperature energy grade extracted heat exhaust heat

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Judicial Seal Target recognition Model Based on dilated Convolution Neural Network 3

Judicial Seal Target Recognition Model Based on Dilated Conv...

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3rd International Conference on Intelligent Communications and Computing, ICC 2023

作者： Gu, Pingli Li, Changbao Wang, Shulong Li, Qian Pan, Shuang Cheng, Bo North China Institute of Computing Technology BigData R&d Center Beijing China Computer School Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9798350308327

Aiming at the problems of seal missing in files of the dossiers. We analyze the object detection under complex background, which is an important checkpoint in dossiers review. The seals on the files are usually unclear, such as blurry, incomplete, overlapping, which are difficult to recognize by the model. In order to solve this problem, we propose a seal detection model, which is based on dilated convolution neural network. More specifically, focus on the clustering algorithm to get the anchors, which are more suitable for seal object. In order to increase the performance of the model in complex background, we use dilated convolutions in the first three sampling layer and ASFF in the neck network. Finally, we use GIOU loss in the loss function of YOLOv3. The F1 value of the seal detection model increased by 8.43 percent, which reaches the seal detection F1 index. © 2023 IEEE.

关键词： Convolution

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Assessment of different Field development Strategies deploying Maximum reservoir Contacting (MrC) Well in Carbonate reservoir: A case study of Oilfield r

Assessment of Different Field Development Strategies Deployi...

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2023 SPE/IATMI Asia Pacific Oil and Gas Conference and Exhibition, APOG 2023

作者： Jia, Han Tong, Min Peng, Hui deng, Xili Song, ruixuan Wang, rui RIPED PetroChina China Artificial Intelligence Technology R&D Center for Exploration and Development CNPC China University of California Santa Cruz United States

ISBN: (纸本)9781613999813

deploying horizontal well is one of the efficient methods to enhanced oil recovery. Maximum reservoir Contact (MrC) well, based on the horizontal well, which indicates the contacting area of wellbore and reservoir should be as large as possible to obtain the optimum exploration effects. The purpose of this paper is to build an assessment and optimization work-flow, which guides the well pattern improvement and well-type selection via a case study of the filed r in a Middle East Carbonate reservoir. Analyzing several field development index, like production performance, gas oil ratio, water cut, pressure, etc. in a pilot-scale well pattern both for the conventional horizontal wells and MrC wells using different injection schemes, including injection timing, injection volume, and injection components, via reservoir numerical simulation. The method using to evaluating reservoir exploration effect in this paper is numerical simulation, assuming different development strategies and well-type, via reservoir numerical simulator. Control-variate method as well as used in this study, which focus on keeping single factor analysis for the simulation. Comparing all the field development indexes among different cases while keeping other factors consistent, for example, exploring the influence from well types, which are MrC well and conventional horizontal well, two cases must be deployed the same injection schemes. Simulating different cases with analyzing the results, MrC wells obtain the better oil production generally compared with conventional horizontal wells. However, oil production performance is not the only index which is cared for in oil & gas industry, additionally, in terms of reservoir engineering, water cut, water breakthrough, gas breakthrough, gas oil ratio, oil steady production plateau, etc., while some economic indexes are extremely concerned by the experts and companies. Consequently, assessment of MrC wells effect should consider many factors from the perspe

关键词： Gases

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The dehydration rotation Speed Curve Extraction based on 3d Vibration Signals for drum Washing Machine 5

The Dehydration Rotation Speed Curve Extraction based on 3D ...

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5th International Conference on Intelligent Control, Measurement and Signal Processing, ICMSP 2023

作者： Zhang, Yuqing Gao, Cuiyun du, Fei Liu, Qingshan Wang, Hongqiang Wang, Zihan Anhui Jianzhu University Power Quality Analysis and Load Detection Technology Laboratory Hefei China Corporation Global R&D Center Hefei China

ISBN: (纸本)9798350336030

GB/T 4288-2018 requires that the sensors be installed on the shell of the washing machine to measure the vibration and displacement, and requires the sensor be installed on the drum to measure the speed. This measurement method is inefficient and has the risk of causing fault due to the second unpacking. To solve the above problem, an 3d acceleration sensor on the shell of a washing machine is used to extract the dehydration rotation speed, and a novel method, named as CSdS-AMdF, is proposed in this paper. Firstly, the desired speed curve of the drum is extracted from the STFT-based maximum harmonic value of the motor current. Secondly, the speed curve is segmented by the adaptive first-order-difference-threshold method. Finally, the segmented-Average Magnitude difference Function (AMdF) is used to extract the rotation speed from the vibration signals of shell and outer tub according to the five segments. Taking six target speeds of a certain type of drum washing machine in the dehydration stage as the experimental object, set the sampling rates as 10kHz, 1kHz and 500Hz respectively to verify the method in this paper. The experiment shows that: The method proposed in this paper has universality for different sampling rates and robustness for 3d, and is suitable for the automatic manufacturing process of washing machines. © 2023 IEEE.

关键词： risk assessment

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A 1.2 to 5.7GHz Multi-Mode dual-Input Power Amplifier Using a Novel Sigmoid-Function-Based Power Splitter

A 1.2 to 5.7GHz Multi-Mode Dual-Input Power Amplifier Using ...

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Microwave, MTT-S International Symposium

作者： Takuma Torii Ao Yamashita Yuji Komatsuzaki Shintaro Shinjo Mitsubishi Electric Corporation Information Technology R&D Center Japan

ISBN: (数字)9798350375046

ISBN: (纸本)9798350375053

We report a novel power splitting scheme for multi-mode dual-input power amplifier at sub-6GHz. The main novelty is the use of a sigmoid function to enable multi-mode load modulation over a wide frequency range with a modulated signal. One input signal is converted to two inputs based on the sigmoid function, which provides optimum signal magnitude and phase of dual input signals. The amplifier, using 0.15μm GaN HEMT FETs, achieved an averaged PAE of 36-56% with a modulated signal over 1.2-5.7GHz, which is 130% fractional bandwidth. This is a promising PA technology for 5G base stations, enabling operators to reduce their total cost of ownership.

关键词： Base stations Microwave technology Power amplifiers Bandwidth HEMTs Microwave amplifiers Space stations

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Separate-Bottom Player CSTBT™ for Approaching Turn-off Switching Loss reduction Limit 35

Separate-Bottom Player CSTBT™ for Approaching Turn-off Swit...

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35th International Symposium on Power Semiconductor devices and ICs, ISPSd 2023

作者： Konishi, Kazuya Nitta, Tetsuya Tamaki, Tomohiro Soneda, Shinya Advanced Technology R&d Center Mitsubishi Electric Corporation Amagasaki Hyogo661-8661 Japan Power Device Works Mitsubishi Electric Corporation

ISBN: (纸本)9798350396829

The dynamic avalanche restricts the turn-off switching speed and limits Eoff reduction. In this paper, we propose a new separate-bottom Player CSTBT™ and demonstrate its impact on Eoff reduction by TCAd simulations. This structure relaxes the electric field at trench bottom and enables faster dI/dt and dV/dt. Therefore, our proposed structure successfully reduces the Eoff by 20% at the same condition of VCE (sat)) as the conventional structure, approaching the Eoff limit. © 2023 IEEE.

关键词： Insulated gate bipolar transistors (IGBT)

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