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Strategy of preparing Smco based films with high coercivity and remanence ratio achieved by temperature and chemical optimization

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Journal of rare Earths 2024年第7期42卷 1289-1297,I0004页

作者： Yansong Gong Zhaoguo Qiu Sizhe Liang Xinrui Zheng Hongxia Meng Zhigang Zheng deyang Chen Shengfu Yuan Weixing Xia dechang Zeng J.P.Liu School of Materials Science and Engineering South China University of TechnologyGuangzhou510640China Zhongshan R&D Center for Materials Surface and Thin Films Technology of the South China University of Technology Gent Materials Surface Technology(Guangdong)Co.Ltd.Zhongshan528437China Institute for Advanced Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China Yangjiang Branch Guangdong Laboratory Materials Science and Technology Yangjiang Advanced Alloys LaboratoryYangjiang529500China Laboratory of Rare-Earth Magnetic Functional Materials Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo315201China Department of Physics University of Texas at ArlingtonArlingtonTX76019USA

Smco based films with excellent intrinsic magnetic properties have promising applications in micro-electro-mechanical system(MEMS).However,due to the complexity of phase composition and uncontrollable crystallization degree of Smco hard magnetic phase in the film,both the coercivity(Hc)and remanence(Mr)of films are difficult to enhance *** this paper,Smco based films were deposited with a Cr underlayer and capping layer on single crystal Si substrates via magnetron sputtering *** effects of annealing parameters and Sm/co atomic ratio on the phase structure and coercivity of films are *** adjusting the Sm/co atomic ratio from 1:5 to 1:4,co soft magnetic phase disappears and the single phase Smco5 is obtained,leading to the increase of coercivity of the films from 30 to 34 *** influence of deposition temperature and Cu doping on magnetic properties of Smco based films was *** the deposition temperature increases from room temperature to 250℃,the coercivity will further increase from 34 to 51 ***,a severe kink is observed in the demagnetization curves due to the poor exchanged *** analysis of transmission electron microscopy(TEM)confirms that the average size of non-hard magnetic amorphous phase exceeds the effective exchanged coupling length of Smco5,which contributes to the decoupling and low remanence ***,doping Cu and applying a post-annealing process can significantly improve the crystallization degree of the *** the coercivity and the remanence ratio of the demagnetization curves are greatly *** propose a plausible strategy to prepare the Smco based films with high coercivity and remanence ratio by temperature and chemical optimization,which can be utilized in high performed MEMS devices.

关键词： rare earths Smco based films Phase composition Crystallization conditions coercivity remanence ratio

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An Optimization Method for LdO design Based on ANN Algorithm

An Optimization Method for LDO Design Based on ANN Algorithm

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IEEE International conference on Electronic Information and communication technology (ICEICT)

作者： Qing Xu Ying He Guangsheng Lai Qingzhou Wang Yanhui Sun Qingjia Jia Yuanyue Li rui Chen Zhao Yao Wanlian Index (Qingdao) Information Technology Co. LTD Qingdao University Qingdao China College of Electronics and Information Qingdao University Qingdao China College of Engineering Chengdu College of University of Electronic Science and Technology Chengdu China EDA R&D Department Qingdao Zhancheng Technology Co. LTD Qingdao China Engineering Department Qingdao Zhancheng Technology Co. LTD Qingdao China

In order to solve the issues of long design cycles and low efficiency of integrated circuit design., a new method combining ANN algorithm was proposed to improve the comprehensive performance of LdO circuits. In this paper., the device parameters and corresponding performance of the LdO circuit were collected as a dataset to train the ANN model. When given the specific target performance of the LdO circuit., the model can predict the optimal device parameters corresponding to the performance., achieving the synchronous improvement of the four key parameters of PM, UGBW., PSrr., and I Q . The results show that the r 2 of the ANN model can be as high as 0.982. Therefore., the proposed method in this paper can effectively accelerate the design of LdO and improve its comprehensive performance.

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Hybrid silicon-barium-titanate tunable racetrack resonators based on chemical solution deposition

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Advanced Photonics Nexus 2024年第6期3卷 38-46页

作者： Lei Zhang Xin Wang Yong Zhang Jian Shen Chenglong Feng Jian Xu Min Liu Wei Wang Yongqiang deng Yang Xu Yi Li Guofeng Yin Yikai Sua Shanghai Jiao Tong University State Key Lab of Advanced Optical Communication Systems and NetworksDepartment of Electron EngineeringShanghaiChina East China Normal University State Key Laboratory of Precision SpectroscopyShanghaiChina Shanghai Jiao Tong University Center for Advanced Electronic Materials and DevicesShanghaiChina Shanghai IndustrialμTechnology Research Institute ShanghaiChina Beijing R&D Institute VanJee TechnologyBeijingChina Wuhan Enlarging Photonics Technology Co.Ltd. WuhanChina

Integrated electro-optic tuning devices are essential parts of optical communication,sensors,and optical machine *** the available materials,silicon is the most promising for on-chip signal processing and ***,silicon is limited owing to the absence of efficient Pockels electro-optic ***,we propose a new hybrid silicon-barium-titanate(Si-BTO)integrated photonic platform,in which the BTO thin film is deposited by the chemical solution deposition(CSd)method.A tunable racetrack resonator is demonstrated to confirm the Pockels electro-optic tuning potential of the BTO thin *** hybrid racetrack resonator has a tuning efficiency of 6.5 pm∕V and a high-power efficiency of 2.16 pm∕***,the intrinsic quality factor of the fabricated racetrack resonator is 48,000,which is the highest in hybrid Si-BTO platforms,to the best of our *** high-speed test verifies the stability of the racetrack *** hybrid Si-BTO technology based on the CSd method has the advantages of low equipment cost and simple fabrication process,which holds promise for low-power electro-optic tuning devices.

关键词： barium titanate chemical solution deposition electro-optic tuning resonator

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ZK60 based alloys with high-strength and high-ductility:A review

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resources Chemicals and Materials 2023年第2期2卷 151-166页

作者： Qiang Yang Zefeng Xie Jun Li Shuhui Lv Wei Zhang ruizhi Wu Hucheng Pan rongguang Li Xin Qiu State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022PR China School of Materials Science and Engineering Changchun University of Science and Technology130022PR China Department of China FAW Co. Ltd.R&D Institute PrototypingChangchun 130011PR China Key Laboratory of Superlight Materials&Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin 150001PR China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) College of Materials Science and EngineeringNortheastern UniversityShenyang 110819PR China School of Mechanical and Power Engineering Shenyang University of Chemical TechnologyShenyang 110142PR China

Wrought magnesium alloys with high-strength and high-ductility property have been attracting more and more interest in automotive and aerospace industries,and the conventional Mg-Zn based alloys are widely accepted as the representative *** of Mg-Zn based alloys with rare earth(rE)element additions and with modified preparation processes domains the evolution of their potential structural ***,their highest tensile yield strength(TYS)is still in the order of 400 MPa,clearly lower than that of the Mg-rE based alloys,in the order of 500 MPa,much less compared with the high-strength aluminum alloys and titanium *** to many previous investigations,two relatively efficient methods to improve mechanical properties of ZK based alloys were revealed as:alloying by rE and optimizing wrought ***,comprehensive combinative investigation was hitherto not conducted to ***,it is imperative in the next work to further improve the yield strength to the order of 500 MPa or much higher,and simultaneously modify the tension-compression strength asymmetry of the ZK series ***,developing novel wrought processes for ZK60(+rE)alloys or exploring appropriate pre-dealing treatments before or after the wrought processes might be an important approach to accomplish a much higher level of balance of high-strength and high-ductility.

关键词： Magnesium alloys High-strength and high-ductility

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257 W/cm2 power-density laser-driven white-light source for high-speed inspection in semiconductor packaging

SSRN

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SSrN 2024年

作者： Won, Seungjai Kim, Taewon Ji, Wonsoo Jung, Sejin Kim, Seung-Woo Kim, Young-Jin Department of Mechanical Engineering Korea Advanced Institute of Science and Technology 291 Daehak-ro Daejeon Korea Republic of Solution R&D Center Envision Co. Ltd 98 Gasan digital 2-ro Geumcheon-gu Seoul Korea Republic of

The demand for high-power-density white-light sources has been increased for high-speed inspection of semiconductor and display products. However, focusing the conventional halogen lamps or light-emitting diodes (LEds) remains challenging due to the large emission area at the light sources, which is governed by the étendue limit. Here, we report a high-power-density light illumination of the laser-driven white-light with a small focal spot size of 25 μm. By using a laser diode (Ld) instead of an LEd, the strong optical power can be concentrated on to the phosphor in a small spot size near the diffraction limit, enabling the emission of low-étendue luminescence. The blue Ld pump (λ=445 nm) and broad yellow luminescence (λ=480-750 nm) were focused together on to the sample with a small spot diameter of 25 μm (full width at half maximum, FWHM), producing a record-high power-density of 257 W/cm2. The speckle constants of the blue Ld, yellow luminescent light, and combined white-light after passing through the diffuser plate were carefully evaluated to 0.28, 0.02, and 0.14, respectively. Furthermore, the power scalability was demonstrated by spatially combining the independently generated white-light sources, which did not show any noticeable coherent speckle increase. This tightly-focusable laser-driven white-light will find its strong potential in next-generation high-speed inspection of advanced semiconductor packaging. © 2024, The Authors. All rights reserved.

关键词： Light emitting diodes

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A Semantic Segmentation Approach for rotating Body Vibration Feature Extraction by Fusing Attention Mechanisms with dynamic Gating

SSRN

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SSrN 2025年

作者： Jiang, Shu Wu, Yue Cao, Kehan Zhang, dongxiang Wan, Guoyang Liu, Bingyou School Of Electrical Engineering Anhui Polytechnic University Anhui Wuhu241000 China Wuhu NO.1 High School Anhui Wuhu241000 China R&D Department Anhui Tianbing Electronic Technology Co. Ltd. Anhui Wuhu241000 China

In recent years, visual vibration measurement has been favored in industrial equipment monitoring due to its advantages of non-contact, long-distance, and easy installation. However, in complex industrial environments with complicated backgrounds and numerous interferences, it is difficult for traditional methods to achieve high-precision segmentation of rotating body, which in turn triggers measurement errors. To this end, this paper proposes a segmentation network based on attention mechanism and dynamic gating fusion, AGF-UKAN, which designs a new up-sampling module Lightweight Hybrid Upsampling Module on the basis of the original UKAN architecture and adopts a parallel approach to fuse the channel attention and SE attention to construct an innovative dC attention mechanism;At the same time, a dynamic gated fusion module is introduced to adaptively adjust the fusion weights of encoder and decoder features in the decoding stage, which effectively improves the segmentation accuracy and robustness. In this paper, extensive experimental validation is carried out on breast ultrasound image dataset, road crack dataset, and self-picked rotor shaft dataset, and the results show that AGF-UKAN significantly outperforms the traditional U-Net and other benchmark networks in terms of dSC and mIoU indexes, which fully demonstrates its significant effectiveness in complex industrial environments. © 2025, The Authors. All rights reserved.

关键词： Semantic Segmentation

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Generalized INFOrM Method with Variable Modulation Frequency for High dynamic Low Speed Sensorless control of PMSM

Generalized INFORM Method with Variable Modulation Frequency...

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International conference on Electrical Machines and Systems (ICEMS)

作者： Xiangzhe Meng Wenyin Zhu ronggang Ni College of Electrical Engineering Qingdao University Qingdao China Qingdao Haier Smart Technology R&D Co. Ltd. Qingdao China

ISBN: (数字)9781665493024

ISBN: (纸本)9781665493031

Sensorless control is a research hotspot in control field because of its low cost and high reliability. The Indirect Flux detection by On-line reactance Measurement (INFOrM) method is the position sensorless control method proposed for the low speed drive of PMSM. However, the injection pattern of traditional INFOrM method degrades the current loop bandwidth and hence the dynamic quality due to the decrease of vector control frequency. In this paper, a generalized INFOrM method with arbitrary injection angle is proposed to avoid possible problems when sector switching or reconstructing phase current by single current sampling, along with a new modulation method with adaptive switching frequency to improve the dynamic performance of INFOrM method.

关键词： Time-frequency analysis Frequency modulation Phase modulation Switching frequency Sensorless control Switches Position measurement

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Analysis of Mutual Inductance Between Parallel Branches for ANPC Laminated Busbar

Analysis of Mutual Inductance Between Parallel Branches for ...

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IEEE International Symposium on Power Electronics for distributed Generation Systems (PEdG)

作者： Sideng Hu Mustafa Tahir Jianfeng Niu Naoto Fujishima Yun Lei Xiangning He College of Electrical Engineering Zhejiang University Hangzhou China Semiconductors Business Group Fuji Electric Co. Ltd. Matsumoto Japan Technology Strategy & Planning Office Corporate R&D Headquarters Fuji Electric Co. Ltd. Japan

Multiple power modules are interfaced in parallel via laminated busbar in high-capacity active neutral-point clamped (ANPC) converters. consequently, the complex mutual coupling among parallel branches profoundly affects their equivalent stray inductance. This study analyzes mutual coupling between parallel branches on the same plane of the busbar and how it affects the equivalent stray inductance, which has not been thoroughly reported. A mutual inductance experimental extraction method is proposed and a mathematical model of stray inductance is established. Then, using the proposed method, stray inductance and mutual inductance of two parallel branches for an ANPC busbar are calculated. Experimental tests verify the accuracy of the proposed method.

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Position Estimation Error correction Strategy Based on dual-Gap dual-Pole composite Machine

Position Estimation Error Correction Strategy Based on Dual-...

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International conference on Electrical Machines and Systems (ICEMS)

作者： Shengming Yang Helong Wang ronggang Ni College of Electrical Engineering Qingdao University Qingdao China Qingdao Haier Smart Technology R&D Co. Ltd. Qingdao China

ISBN: (数字)9781665493024

ISBN: (纸本)9781665493031

The accuracy of rotor position observation error affects the performance of sensorless control. However, it is inevitable that the rotor position error of the sliding mode observer (SMO) method based on the extended back electromotive force will appear. This paper describes the causes of position error based on SMO and proposes a correction strategy for the electrical angle of the dual-gap dual-pole composite machine (ddCM). Finally, simulations and experiments are performed to verify the feasibility of the proposed method.

关键词： Estimation error Force rotors Sensorless control Observers

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A deep reinforcement Learning Method for Orthogonal Turn-Milling Parameters Optimization

A Deep Reinforcement Learning Method for Orthogonal Turn-Mil...

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robotics & Intelligent Manufacturing technology (ISrIMT), International Symposium on

作者： Qing Xia Xiushang duan Chao Yin Xiaorong Gong Chuan Yang College of Mechanical and Vehicle Engineering Chongqing University Chongqing China R&D Center Chongqing CEPREI Industrial Technology Co. Ltd Chongqing China College of Mechanical Engineering Chongqing University of Technology Chongqing China CEPREI Southwestern Branch China Electronic Product Reliability and Environmental Testing Research Institute (CEPREI) Guanzhou China

ISBN: (数字)9798331528942

ISBN: (纸本)9798331528959

Turn-milling is an advanced manufacturing technology which has been widely applied to various industries due to its high-speed and interrupted cutting. However, there are few literatures studying on the multi-objective optimization of turn-milling, which can effectively improve overall performance of turn-milling to realize profit maximization. In this paper, we presented a multi-objective optimization method based on deep reinforcement learning (drL) to solve the multi-objective optimization problem of orthogonal turn-milling parameters. This method adopts a decomposition strategy to convert the optimization problem into multiple subproblems of single objective. Then all subproblems are modelled by neural networks, and collaboratively optimized by means of a drL algorithm and a neighborhood-based parameter transfer strategy. Finally, the Pareto optimal solutions are obtained from these optimized neural networks by means of the greedy strategy. Extensive experimental results show the effectiveness and competitiveness of the proposed method for solving the multi-objective optimization problem.

关键词： Industries Neural networks Pareto optimization deep reinforcement learning Manufacturing

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