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8th International Conference on Signal and Image Processing, ICSIP 2023

作者： Pan, Bunian Wang, Bing Dong, Luxin Yao, Xue Yu, Xianxiang Cui, Guolong University of Electronic Science and Technology of China School of Information and Communication Engineering Chengdu611731 China Science and Technology on Electronic Information Control Laboratory Chengdu610036 China Southeast University School of Information Science and Engineering Nanjing211100 China

ISBN: (纸本)9798350397932

This paper deals with the problem of mainlobe jamming suppression for phased-array radar system via a joint polarization-space-time processing method resorting to tensor decomposition. Firstly, a dual-polarization receiving array model is established. Then, base on the polarization-space-time characteristics, CANDECOMP/PARAFAC (CP) decomposition is leveraged to recast the received signals as a third-order tensor consisting of three factor matrices. Further, the target echo and the jamming signal can be obtained via minimizing the Frobenius norm of the approximation error between the factor matrices and their iteration forms. Finally, the effectiveness of the proposed method by numerical simulation is verified, showing its capability to resist mainlobe jamming compared with the art competing method. © 2023 IEEE.

关键词： Numerical methods

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Homojunction and ohmic contact coexisting carbon nitride for efficient photocatalytic hydrogen evolution

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Nano Research 2023年第7期16卷 8782-8792页

作者： Xiao Fang Lu Chen Hongrui Cheng Xiaoqiong Bian Wenhao Sun Kaining Ding Xinghe Xia Xin Chen Jiefang Zhu Yuanhui Zheng College of Chemistry Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated MaterialsFuzhou UniversityFuzhou 350116China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350116China College of Physics and Information Engineering Fuzhou UniversityFuzhou 350116China Department of Chemistry−Ångström Laboratory Uppsala UniversityUppsala SE-75121Sweden The Key Laboratory for Ultrafine Materials of The Ministry of Education East China University of Science and TechnologyShanghai 200237China

Carbon nitride(CN)has attracted intensive attention as a visible light photocatalyst,but the rapid recombination of photogenerated charge carriers limits its photocatalytic ***,we develop a new strategy to construct both homojunction and ohmic junction into CN via selectively introducing metallized CN(MCN),which leads to rapid separation and transfer of photogenerated charge *** polymerization of urea in the presence of KOH creates CN homojunction with amino and cyano *** subsequent molten salt treatment induces a new type of cyano-terminated CN that can be converted to MCN through photodoping,forming homojunction and ohmic contact coexisting CN(HOCN).The formed HOCN photocatalyst exhibits a high photocatalytic H_(2)evolution rate of 18.5 mmol·g^(-1)·h^(-1)under visible light irradiation,45-fold higher than that of bulk *** strategy provides a new idea for designing ohmic contact between semiconductor and metal,and realizing efficient photocatalysis by improving charge separation and transfer.

关键词： carbon nitride photocatalysis homojunction ohmic contact hydrogen evolution

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Position sensorless switching control strategy of SPMSMs based on fault tolerance of position sensor 6

Position sensorless switching control strategy of SPMSMs bas...

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6th IEEE International Electrical and Energy Conference, CIEEC 2023

作者： Tan, Zexin Zhu, Junjie Wu, Zhicheng Xu, Jin Naval University of Engineering National Key Laboratory of Science and Technology on Vessel Integrated Power System Wuhan China

ISBN: (纸本)9798350346671

This paper proposes a switching method based on model reference adaptive system (MRAS) from position sensor control strategy to sensorless control strategy for surface permanent magnet synchronous motor (SPMSM) drives operating in medium and high velocity regions. The proposed switching method can effectively deal with the fault of the position sensor in SPMSM system, so as to improve its safety and stability. The sensor setting of control strategy consists of an actual sensor (position sensor) and the virtual sensor (MRAS). When the system position sensor has no fault, the feedback value of the position sensor has a greater weight on the information of the rotor position and velocity of the closed-loop system, while the weight of the MRAS estimated value is lower. When the position sensor fails, the information of the rotor position and velocity of the closed-loop system is provided by MRAS algorithm. Also, a linear weighted switching method is proposed, which can effectively reduce the motor fluctuation during the switching process. The feasibility of the proposed strategy is confirmed via simulations of SPMSM drive model in MATLAB/Simulink software. © 2023 IEEE.

关键词： Fault tolerance

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Antenna Design for Modern Mobile Phones: A Review

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Electromagnetic science 2024年第2期2卷 55-90页

作者： Yan Wang Libin Sun Zhengwei Du Zhijun Zhang Key Laboratory for Information Science of Electromagnetic Waves(MoE) School of Information Science and TechnologyFudan UniversityShanghai 200433China Shanghai Huawei Technologies Ltd.Shanghai 201206China Beijing National Research Center for Information Science and Technology Department of Electronic EngineeringTsinghua UniversityBeijing 100084China

Due to limited antenna space,high communication requirements,and strict regulatory constraints,the design of antennas for modern mobile phones has become an exceedingly challenging *** recent years,numerous studies have been conducted in this area,leading to significant *** review paper comprehensively summarizes recent progress made in antenna design for modern mobile ***,the challenges faced in antenna design for modern mobile phones are described,including bandwidth enhancement,integration and decoupling techniques,mm-wave array antennas,satellite communication antennas,as well as interactions between mobile antennas and the human ***,the basic antenna types(such as inverted-F,slot,loop,and planar inverted-F antennas)commonly used in modern metal-bezel mobile phones along with their key characteristics are briefly ***,the commonly exployed methods used in practical applications for designing wideband antennas within compact sizes and achieving decoupling among multiple antennas with wide bandwidths are ***,recent advances in the design of compact,wideband,and wide-angle scanning mm-wave arrays for modern mobile phones are ***,recent progress made in satellite communication antenna designs for modern mobile phones,including broadside and end-fire radiation patterns,is ***,recent studies on the interaction between mobile antennas and the human body are briefly ***,the future challenge of antenna design for mobile phones is briefly *** is our hope that this comprehensive review will provide readers with a systematic understanding of antenna design principles applicable to modern mobile phones.

关键词： Mobile antenna Bandwidth Decoupling mm-wave antenna Satellite communication antenna Specific absorption rate

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Multiple input self-organizing-map ResNet model for optimization of petroleum refinery conversion units

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Frontiers of Chemical science and engineering 2023年第6期17卷 759-771页

作者： Jiannan Zhu Vladimir Mahalec Chen Fan Minglei Yang Feng Qian Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai 200237China Department of Chemical Engineering McMaster UniversityHamiltonOntario L8S 4L8Canada Engineering Research Center of Process System Engineering Ministry of EducationEast China University of Science and TechnologyShanghai 200237China

This work introduces a deep-learning network,i.e.,multi-input self-organizing-map ResNet(MISR),for modeling refining units comprised of two reactors and a separation *** model is comprised of self-organizing-map and the neural network *** self-organizing-map part maps the input data into multiple two-dimensional planes and sends them to the neural network *** the neural network part,residual blocks enhance the convergence and accuracy,ensuring that the structure will not be overfitted *** of the MISR model of hydrocracking unit also benefits from the utilization of prior knowledge of the importance of the input variables for predicting properties of the *** results show that the proposed MISR structure predicts more accurately the product yields and properties than the previously introduced self-organizing-map convolutional neural network model,thus leading to more accurate optimization of the hydrocracker ***,the MISR model has smoother error convergence than the previous *** operating conditions have been determined via multi-round-particle-swarm and differential evolution *** experiments show that the MISR model is suitable for modeling nonlinear conversion units which are often encountered in refining and petrochemical plants.

关键词： hydrocracking convolutional neural networks self-organizing map deep learning data-driven optimization

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Enhancing building pattern recognition through multi-scale data and knowledge graph:a case study of C-shaped patterns

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International Journal of Digital Earth 2023年第1期16卷 3860-3881页

作者： Zhiwei Wei Wenjia Xu Yi Xiao Mi Shu Lu Cheng Yang Wang Chunbo Liu Key Laboratory of Network Information System Technology(NIST) Aerospace Information Research InstituteChinese Academy of SciencesBeijingPeople’s Republic of China The Aerospace Information Research Institute Chinese Academy of SciencesBeijingPeople’s Republic of China School of Information and Communication Engineering Beijing University of Posts and TelecommunicationsBeijingPeople’s Republic of China School of Software Engineering Shenzhen Institute of Information TechnologyShenzhenPeople’s Republic of China Institute of Remote Sensing and GIS Peking UniversityBeijingPeople’s Republic of China School of Geography Science and Geomatics Suzhou University of Science and TechnologySuzhouPeople’s Republic of China

Building pattern recognition is important for understanding urban forms,automating map generalization,and visualizing 3D city ***,current approaches based on object-independent methods have limitations in capturing all visually aware patterns due to the part-based nature of human ***,these approaches also suffer from inefficiencies when applying proximity graph *** address these limitations,we propose a framework that leverages multi-scale data and a knowledge graph,focusing on recognizing C-shaped building *** first employ a specialized knowledge graph to represent the relationships between buildings within and across various ***,we convert the rules for C-shaped pattern recognition and enhancement into query conditions,where the enhancement refers to using patterns recognized at one scale to enhance pattern recognition at other ***,rule-based reasoning is applied within the constructed knowledge graph to recognize and enrich C-shaped building *** verify the effectiveness of our method using multi-scale data with three levels of detail(LODs)collected from AMap,and our method achieves a higher recall rate of 26.4%for LOD1,20.0%for LOD2,and 9.1%for LOD3 compared to existing methods with similar ***,also achieve recognition efficiency improvements of 0.91,1.37,and 9.35 times,respectively.

关键词： Building pattern recognition urban form knowledge graph rule-based reasoning

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Optimization Design of Node Seismometer Data Storage Based on STM32 11

Optimization Design of Node Seismometer Data Storage Based o...

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11th International Conference on Environmental and engineering Geophysics, ICEEG 2024

作者： Yang, Lan Shen, Tong Tan, Mingjie Ruan, Bo Leng, Yangchun Country School of Information and Engineering Southwest University of Science and Technology Mianyang China Country Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory Southwest University of Science and Technology Mianyang China

The application of high-resolution analog-to-digital conversion devices in wireless seismic data acquisition equipment causes massive invalid noise and seismic signals to be generated during long-term seismic acquisition, and the subsequent processing of massive data will occupy a lot of system resources. To address the above issues, we employ the STM32F4 as the core to integrate an improved environmental dynamic threshold P-wave picking algorithm for continuous vibration data acquisition. During data storage, only the relevant vibration signals are preserved to minimize the storage of irrelevant data and enhance work efficiency. The research results indicate that embedding a vibration identification algorithm inside the microcontroller can quickly and effectively identify seismic data, filter out invalid noise signals, reduce data volume, and improve work efficiency. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Analog to digital conversion

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Strong spin frustration and magnetism in kagoméantiferromagnets LnCu_(3)(OH)_(6)Br_(3)(Ln=Nd,Sm,and Eu)

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Chinese Physics B 2023年第4期32卷 103-108页

作者：钟金群余振伟岳小宇王义炎梁慧孙燕吴丹丹丁宗玲孙进孙学峰李秋菊 School of Materials Science and Engineering Anhui UniversityHefei 230601China Institute of Physical Science and Information Technology Anhui UniversityHefei 230601China Department of Physics and Key Laboratory of Strongly-Coupled Quantum Matter Physics(CAS)University of Science and Technology of ChinaHefei 230026China School of Physics and Optoelectronic engineering Anhui UniversityHefei 230601China School of Optical and Electronic Information Suzhou City UniversitySuzhou 215104China

To study the effects of lanthanide ions on the geometrically frustrated antiferromagnets and their magnetic properties,we grew high-quality single crystals of LnCu_(3)(OH)_(6)Br_(3)(Ln=Nd,Sm,and Eu)by hydrothermal method and studied their crystal structures and magnetic *** refinements of the crystal structure referred to the powder x-ray diffraction data show that LnCu_(3)(OH)_(6)Br_(3)adopt a Kapellasite-type layer structure,which is isostructural to their chlorine *** susceptibilities demonstrate that LnCu_(3)(OH)_(6)Br_(3)have strong antiferromagnetic coupling and a pronounced magnetic frustration *** measurements indicate canted antiferromagnetic ordering of Cu^(2+)ions around 16 K within the kagoméplane and weak ferromagnetic ***,shoulder-like anomalies in specific heat around 16 K could be a signature of emergent of magnetic *** low-temperature negative magnetization and specific heat of LnCu_(3)(OH)_(6)Br_(3)(Ln=Nd,Sm,and Eu)indicate that Ln^(3+)ions induce more exotic magnetic ground state properties.

关键词： kagomélattice antiferromagnet single crystal spin frustration

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STARS Assisted Semi-Grant-Free NOMA Communications

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IEEE Transactions on Wireless Communications 2025年第6期24卷 4904-4919页

作者： Xie, Jin Yue, Xinwei Zhao, Jingjing Zou, Yixuan Liu, Yuanwei Liu, Rongke Ding, Zhiguo Key Laboratory of Information and Communication Systems China Beijing Information Science and Technology University Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing100101 China Beihang University School of Electronic and Information Engineering Beijing100191 China Queen Mary University of London School of Electronic Engineering and Computer Science LondonE1 4NS United Kingdom The University of Hong Kong Department of Electrical and Electronic Engineering Hong Kong Hong Kong Kyung Hee University Department of Electronic Engineering Gyeonggi-do Yongin-si17104 Korea Republic of Khalifa University Department of Computer and Information Engineering Abu Dhabi United Arab Emirates

This paper investigates the performance of simultaneously transmitting and reflecting surface (STARS) assisted semi-grant-free non-orthogonal multiple access network with randomly distributed users. By deploying STARS, the transmit signals of grant-based user (GBU) and grant-free users (GFUs) can be exquisitely adjusted to reduce interference. We propose a maximum channel scheduling (MCS) protocol that allows a GFU to access GBU’s channel with the assistance of STARS. In particular, the impacts of perfect/imperfect successive interference cancellation (pSIC/ipSIC) on MCS protocol are taken into account. To characterize the performance of STARS aided MCS (STARS-MCS) network, we derive the expressions of outage probability for GBU and GFU with pSIC/ipSIC. By applying convolution theorem and Laplace transform, the asymptotic expressions of outage probability and diversity orders for GBU and GFU are attained. We further design a STARS-based power control (SPC) strategy to eliminate the outage probability error floor and improve the outage performance. Numerical results show that: 1) The performance of STARS-MCS outperforms the existing benchmarks in terms of outage probability and system throughput;2) The SPC strategy can effectively improve the performance of the STARS-MCS network and eliminate the outage probability error floor at high signal-to-noise ratios;and 3) By adjusting reflection and transmission coefficients of STARS, the outage performance of GBU and GFU can be greatly enhanced. © 2025 IEEE. All rights reserved.

关键词： Laplace transforms

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CRD-CGAN:category-consistent and relativistic constraints for diverse text-to-image generation

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Frontiers of Computer science 2024年第1期18卷 61-75页

作者： Tao HU Chengjiang LONG Chunxia XIAO College of Intelligent Systems Science and Engineering Hubei Minzu UniversityEnshi 445000China School of Computer Science Wuhan UniversityWuhan 430072China Key Laboratory of Performing Art Equipment&System Technology Ministry of Culture and TourismBeijing 100007China Meta Reality Labs BurlingameCA94010USA

Generating photo-realistic images from a text description is a challenging problem in computer *** works have shown promising performance to generate synthetic images conditional on text by Generative Adversarial Networks(GANs).In this paper,we focus on the category-consistent and relativistic diverse constraints to optimize the diversity of synthetic *** on those constraints,a category-consistent and relativistic diverse conditional GAN(CRD-CGAN)is proposed to synthesize K photo-realistic images *** use the attention loss and diversity loss to improve the sensitivity of the GAN to word attention and ***,we employ the relativistic conditional loss to estimate the probability of relatively real or fake for synthetic images,which can improve the performance of basic conditional ***,we introduce a category-consistent loss to alleviate the over-category issues between K synthetic *** evaluate our approach using the Caltech-UCSD Birds-200-2011,Oxford 102 flower and MS COCO 2014 datasets,and the extensive experiments demonstrate superiority of the proposed method in comparison with state-of-the-art methods in terms of photorealistic and diversity of the generated synthetic images.

关键词： text-to-image diverse conditional GAN relativi-stic category-consistent

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