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Key-Part Attention Retrieval for Robotic Object Recognition

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Tsinghua Science and Technology 2024年第3期29卷 644-655页

作者： Jierui Liu Zhiqiang Cao Yingbo tang State KeyLaboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of SciencesBeijing100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China

The ability to recognize novel objects with a few visual samples is critical in the robotic *** methods mainly concern the recognition of inter-category objects,however,the object recognition fromdifferent sub-classes within the same category remains challenging due to their similar *** thispaper,we propose a key-part attention retrieval solution to distinguish novel objects of different sub-classesaccording to a few samples without ***,an object encoder,including convolutional neuralnetwork with attention and key-part aggregation,is designed to generate object attention map and extract theobject-level embedding,where object attention map from the middle stage of the backbone is used to guide thekey-part ***,to overcome the non-differentiability drawback of key-part attention,the objectencoder is trained in a two-step scheme,and a more stable object-level embedding is *** this basis,the potential objects are located from a scene image by mining connected domains of the attention *** the embedding of each potential object and embeddings from support data,the recognition of thepotential objects is *** effectiveness of the proposed method is verified by experiments.

关键词： key-part attention retrieval robotic object recognition

A Least-squares-based Iterative Method with Better Convergence for PF/OPF in Integrated Transmission and Distribution Networks

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 953-962页

作者： kunjie tang Shufeng Dong Yonghua Song College of Electrical Engineering Zhejiang UniversityHangzhou 310027China State Key Laboratory of Internet of Things for Smart City and Department of Electrical and Computer Engineering University of MacaoMacao SARChina IEEE

The limitations of the conventional master-slavesplitting(MSS)method,which is commonly applied to power flow and optimal power flow in integrated transmission and distribution(I-T&D)networks,are first *** that the MSS method suffers from a slow convergence rate or even divergence under some circumstances,a least-squares-based iterative(LSI)method is *** with the MSS method,the LSI method modifies the iterative variables in each iteration by solving a least-squares problem with the information in previous iterations.A practical implementation and a parameter tuning strategy for the LSI method are ***,a LSI-PF method is proposed to solve I-T&D power flow and a LSIheterogeneous decomposition(LSI-HGD)method is proposed to solve optimal power *** experiments demonstrate that the proposed LSI-PF and LSI-HGD methods can achieve the same accuracy as the benchmark ***,these LSI methods,with appropriate settings,significantly enhance the convergence and efficiency of conventional ***,in some cases,where conventional methods diverge,these LSI methods can still converge.

关键词： Fixed-point theory integrated transmission and distribution networks least-squares-based iterative method master-slave-splitting method optimal power flow power flow

Large magnetostriction of Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)/epoxy composites in a wide temperature range

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Journal of Rare Earths 2024年第4期42卷 705-709页

作者： Hehe Ding Yangguang Shi Shaolong tang MIIT Key Laboratory of Aerospace Information Materials and Physics Department of Applied PhysicsNanjing University of Aeronautics and AstronauticsNanjing210016China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing210093China

We report the magnetostrictive performance of the Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)/epoxy *** of M?ssbauer spectra and the XRD results indicate that the easy magnetic direction of the Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)compound is alongdirection with spontaneous magnetostrictionλ111 of1900 ***-oriented Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)/epoxy composites with particle volume fractions of20 vol%-55 vol%were *** measurements demonstrate that the composite is highly *** raw material cost of Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)is about 85%of that of the Terfenol-D(Tb_(0.3)Dy_(0.7)Fe_(2))***_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)/epoxy composites possess comparable magnetostriction with those composites made of Tb_(0.3)Dy_(0.7)Fe_(2)*** room temperature,the magnetostrictionλ_Ⅱof the Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93)/epoxy composite reaches 420 ppm at a low field of 80 kA/m and about1000 ppm at 239 kA/*** addition,the composite exhibits a large saturation magnetostrictionλ_Ⅱover1200 ppm from 300 to 100 K,suggesting its potential applications as a low-cost magnetostrictive material in a wide temperature ***,the current study offers an opportunity to widen the operating temperature range of the magnetostrictive composite.

关键词： Magnetostrictive composite Nd_(0.2)Tb_(0.3)Dy_(0.5)Fe_(1.93) Wide temperaturerange Laves phase Rare earths

Cronkhite-Canada syndrome with esophagus involvement and sixyear follow-up:A case report

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World Journal of Gastroenterology 2024年第8期30卷 984-990页

作者： Yu-Chen tang Department of Endocrinology The First Affiliated Hospital of Ningbo UniversityNingbo 315000Zhejiang ProvinceChina

BACKGROUND Cronkhite-Canada syndrome(CCS)is a rare,noninherited disease characterized by gastrointestinal polyposis with diarrhea and ectodermal *** polyps are distributed through the whole digestive tract,and they are common in the stomach and colon but very uncommon in the *** SUMMARY Here,we present a case of a 63-year-old man with skin hyperpigmentation accompanied by diarrhea,alopecia,and loss of his *** data indicated anemia,hypoalbuminemia,hypocalcemia,hypokalemia,and positive fecal occult *** showed numerous polyps scattered throughout the digestive tract,including the *** was treated with nutritional support and glucocorticoids with remission of his *** Comprehensive treatment led by hormonal therapy can result in partial or full remission of clinical *** should be individualized for each patient according to their therapy *** endoscopy is necessary for assessing mucosal disease activity and detecting malignant transformation.

关键词： Cronkhite-Canada syndrome Gastrointestinal polyposis Hormonal therapy Prognosis Case report

U-Pb zircon ages and petrogeochemistry and tectonic implications of gabbro and granite in southwest Lahad Datu area of Sabah, Malaysia

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Acta Oceanologica Sinica 2024年第2期43卷 94-110页

作者： Zhigang Zhao Wu tang Shixiang Liu Huafeng tang Pujun Wang Zhiwen Tian China National Offshore Oil Corporation(CNOOC)Research Institute Co. Ltd.Beijing 100028China College of Earth Sciences Jilin UniversityChangchun 130061China

The southwest Lahad Datu felsic rocks were previously thought to have formed in the late Triassic as part of the microcontinental crystalline *** on U-Pb ages,geochemistry,and the Hfisotopes of zircon from the southeastern Sabah gabbro and granite,in this study,the tectonic properties of the Sabah area during the Triassic were *** weighted average U-Pb zircon ages of the gabbro and granite samples were determined to be(230.9±2.5)Ma and(207.1±3.3)Ma,*** granite had SiO_(2) contents of 66.54%-79.47%,low TiO_(2) contents of 0.08%-0.3%,Al_(2)O_(3) contents of 10.97%-16.22%,Na_(2)O contents of 5.91 %-6.39%,and low K_(2)O contents of 0.15%-0.65%.The chondrite-normalized rare earth element(REE) patterns exhibit light REE enrichment,with right-sloping *** primitive mantle-normalized trace element spider diagrams exhibit Th,U,La,Sr,and Zr enrichment and Nb,Ta,P and Ti depletions,i.e.,the geochemical characteristics of typical island arc igneous *** tectonic discriminant diagram indicates that the granite is a volcanic arc *** Hf isotopic an alysis of gabbro zircon revealed that the zircons have ε_(Hf)(t)values of 12.08-16.24(mean of 14.32) and two-stage model ages(t_(DM2)) of 223-491 Ma(mean of 347 Ma).This indicates that the diagenetic magma of the gabbro was mainly derived from melting of newly formed crustal *** ophiolite in southeast Sabah has existed since the early Late *** crystalline basement granite in southeastern S abah was emplaced lasted from late Triassic to early *** on previous studies and global plate reconstruction models,it is speculated that the southeastern Sabah granite may have been formed in an island arc setting,i.e.,where the oceanic crust of the Paleo-Tethys Ocean collided with the oceanic crust of the Panthalassa Ocean.

关键词： Sabah early late Triassic ophiolite granite tectonic properties

Diet and physical activity influence the composition of gut microbiota,benefit on Alzheimer's disease

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Food Science and Human Wellness 2024年第2期13卷 541-555页

作者： Jinyue Zhou Min tang Wanyi Li Rui Fang Chunlan tang Qinwen Wang 无 School of Public Health Health Science CenterNingbo UniversityNingbo 315211China Department of Neurology Ningbo Rehabilitation HospitalNingbo 3151000China Ningbo Institute of Life and Health Industry University of Chinese Academy of SciencesNingbo 315100China Key Laboratory of Diagnosis and Treatment of Digestive System Tumors of Zhejiang Province Ningbo 315100China

Alzheimer's disease is a neurodegenerative disease with complex *** microbiota influences the gutbrain axis,which may affect pathways related to the pathogenesis of Alzheimer's ***,diet and physical activity are likely to affect the pathology of Alzheimer's disease as well as the gut *** demonstrates that it may be possible to prevent or halt the progression of Alzheimer's disease by regulating the gut microbiota using diet and physical activity ***,the present study reviews the association between these two interventions and gut microbiota in the human *** also summarizes how these two interventions benefit Alzheimer's ***,the primary limitations of these two interventions are discussed and promising strategies are proposed,which may be beneficial to further study and develop the intervening measure for the progression of Alzheimer's disease.

关键词： Alzheimer’s disease Gut microbiota Brain-gut axis Diet Physical activity

Lycorine derivative effectively inhibits the replication of coronaviruses both in vitro and in vivo

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hLife 2024年第2期2卷 75-87页

作者： Liang Shen Jianzhong Zhao Ying Xia Junjie Lu Jiali Sun Jian tang Hui xing Lijuan Yin Yang Yang Chunhua Wang Department of Clinical Laboratory Xiangyang Central HospitalAffiliated Hospital of Hubei University of Arts and ScienceHubeiChina Shenzhen Key Laboratory of Pathogen and Immunity National Clinical Research Center for Infectious DiseaseState Key Discipline of Infectious DiseaseShenzhen Third People’s HospitalSecond Hospital Affiliated to Southern University of Science and TechnologyGuangdongChina Department of Clinical Laboratory Xiangyang No.1 People’s HospitalHubei University of MedicineHubeiChina State Key Laboratory of Food Nutrition and Safety Key Laboratory of Industrial MicrobiologyMinistry of EducationTianjin Key Laboratory of Industry MicrobiologyNational and Local United Engineering Lab of Metabolic Control Fermentation TechnologyChina International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal ChemistryCollege of BiotechnologyTianjin University of Science&TechnologyTianjinChina

The established and ongoing prevalence of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and seasonal human coronaviruses(HCoV)like HCoV-OC43,HCoV-NL63,and HCoV-229E,pose a continuous threat to public ***,it is urgently needed to explore antiviral drugs with broad-spectrum anti-coronavirus *** previous studies have revealed that lycorine is a potent broad-spectrum anti-coronavirus drug,a natural alkaloid extracted from Amaryllidaceae with various pharmacological and microbiological ***,it is unsafe to directly use lycorine as a clinical antiviral drug due to the cytotoxicity and induction of cell *** this study,a series of lycorine derivatives were designed and *** of them,named Ly-8,was found to effectively inhibit the replication of different coronavirus strains in vitro,including ***,Ly-8 was also shown to effectively inhibit HCoVOC43 replication in the central nervous system,and provide effective protection against HCoV-OC43 infection in mice with low drug ***,Ly-8-resistant mutants were not observed during the 30 times sequential passages in cell ***,these findings suggest that Ly-8 may be a potential candidate drug for the future development of broad-spectrum anti-coronavirus drugs.

关键词： broad-spectrum antiviral drug lycorine derivative Ly-8

Model-driven path planning for robotic plasma cutting of branch pipe with single Y-groove based on pipe-rotating scheme

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Advances in Manufacturing 2024年第1期12卷 94-107页

作者： Yan Liu Qiu tang Xin-Cheng Tian School of Control Science and Engineering Shandong UniversityJinan250061People’s Republic of China Engineering Research Center of Intelligent Unmanned System Ministry of EducationJinan250061People’s Republic of China School of Mechanical and Electronic Engineering Shandong Jianzhu UniversityJinan250101People’s Republic of China

The automatic cutting of intersecting pipes is a challenging task in *** improved automation and accuracy,this paper proposes a model-driven path planning approach for the robotic plasma cutting of a branch pipe with a single ***,it summarizes the intersection forms and introduces a dual-pipe intersection *** on this model,the moving three-plane structure(a description unit of the geometric characteristics of the intersecting curve)is constructed,and a geometric model of the branch pipe with a single Y-groove is ***,a novel mathematical model for plasma radius and taper compensation is ***,the compensation model and groove model are integrated by establishing movable ***,to prevent collisions between the plasma torch and workpiece,the torch height is planned and a branch pipe-rotating scheme is *** the established models and moving frames,the planned path description of cutting robot is provided in this novel *** accuracy of the proposed method is verified by simulations and robotic cutting experiments.

关键词： Automatic groove cutting of intersecting pipes Model-driven robot path planning Plasma beam radius and taper compensation

Low palladium content CeO_(2)/ZnO composite for acetone sensor with sub-second response prepared by ultrasonic method

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Journal of Central South University 2024年第7期31卷 2137-2149页

作者： CHEN Xu-jie xing Qiao-ling tang Xuan CAI Yong ZHANG Ming Hunan Provincial Key Laboratory of Low-dimensional Structural Physics&Devices School of Physics and ElectronicsHunan UniversityChangsha 410082China Changsha Semiconductor Technology and Application Innovation Research Institute College of Semiconductors(College of Integrated Circuits)Hunan UniversityChangsha 410082China School of Mechanical Engineering and Mechanics Xiangtan UniversityXiangtan 411105China Research Institute of Hunan University in Chongqing Chongqing 401120China Engineering Research Center of Advanced Semiconductor Technology and Application of Ministry of Education&Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education National Key Laboratory of Power Semiconductor and Integration TechnologyCollege of Semiconductors(College of Integrated Circuits)Hunan UniversityChangsha 410082China

In practical applications,noble metal doping is often used to prepare high performance gas sensors,but more noble metal doping will lead to higher preparation *** this study,CeO_(2)/ZnO-Pd with low palladium content was prepared by ultrasonic method with fast response and high selectivity for acetone *** the same amount of palladium added,the selectivity coefficient of CeO_(2)/ZnO-Pd is 1.88 times higher than that of the stirred *** with the pure PdO-doped CeO_(2)/ZnO-PdO material,the content of Pd in CeO_(2)/ZnO-PdO is about 30%of that in CeO_(2)/ZnO-PdO,but the selectivity coefficient for acetone is 2.56 times *** CeO_(2)/ZnO-Pd sensor has a higher response(22.54)to 50×10^(−6) acetone at 300℃and the selectivity coefficient is 2.57 times that of the CeO_(2)/ZnO *** sensor has a sub-second response time(0.6 s)and still has a 2.36 response to 330×10^(−9) of *** doping makes Pd particles smaller and increases the contact area with ***,the composition of n-p-n heterojunction and the synergistic effect of Pd/PdO improve the sensor *** shows that ultrasonic Pd doping provides a way to improve the utilization rate of doped metals and prepare highly selective gas sensors.

关键词： low palladium sub-second responce ultrasonic method acetone sensor heterojunction