检索结果-南通市图书馆

Internet of robotic things for mobile robots:concepts,technologies,challenges,applications,and future directions

在线全文

学校读者我要写书评

暂无评论

Digital communications and Networks 2023年第6期9卷 1265-1290页

作者： Homayun Kabir Mau-Luen tham Yoong choon chang Department of Electrical and Electronic Engineering Lee Kong Chian Faculty of Engineering and ScienceUniversiti Tunku Abdul RahmanSelangor 43000Malaysia

Nowadays,Multi Robotic System(MRS)consisting of different robot shapes,sizes and capabilities has received significant attention from researchers and are being deployed in a variety of real-world *** sensors and actuators improved by communication technologies to powerful computing systems utilizing advanced Artificial Intelligence(AI)algorithms have rapidly driven the development of MRS,so the Internet of things(Iot)in MRS has become a new topic,namely the Internet of Robotic things(IoRt).this paper summarizes a comprehensive survey of state-of-the-art technologies for mobile robots,including general architecture,benefits,challenges,practical applications,and future research *** addition,remarkable research of i)multirobot navigation,ii)network architecture,routing protocols and communications,and iii)coordination among robots as well as data analysis via external computing(cloud,fog,edge,edge-cloud)are merged with the IoRt architecture according to their ***,security is a long-term challenge for IoRt because of various attack vectors,security flaws,and *** threats,attacks,and existing solutions based on IoRt architectures are also under ***,the identification of environmental situations that are crucial for all types of IoRt applications,such as the detection of objects,human,and obstacles,is also critically ***,future research directions are given by analyzing the challenges of IoRt in mobile robots.

关键词： Multi Robotic System(MRS) Internet of things(Iot) Internet of Robotic things(IoRt) cloud computing Artificial intelligence(AI) Machine learning(ML) Reinforcement learning(RL)

Fur glowing under ultraviolet:in situ analysis of porphyrin accumulation in the skin appendages of mammals

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrative Zoology 2023年第1期18卷 15-26页

作者： Séverine L.D.tOUSSAINt Jasper PONStEIN Mathieu tHOURY Rémi MÉtIVIER Daniela c.KALtHOFF Benoît HABERMEYER Roger GUILARD Steffen BOcK peter MORtENSEN Sverre SANDBERG Pierre GUERIAU Eli AMSON AG Vergleichende Zoologie Institut für BiologieHumboldt Universität zu BerlinBerlinGermany Museum für Naturkunde Berlin Leibniz Institute for Evolution and Biodiversity ScienceBerlinGermany AG Paläobiologie und Evolution Institut für BiologieHumboldt Universität zu BerlinBerlinGermany IPANEMA CNRSministère de la CultureUVSQMNHNUSR3461UniversitéParis-SaclayGif-sur-YvetteFrance UniversitéParis-Saclay ENS Paris-SaclayCNRSPPSMGif-sur-YvetteFrance Department of Zoology Swedish Museum of Natural HistoryStockholmSweden Porphychem SAS DijonFrance IcMUB UMR CNRS 6302Universitéde Bourgogne Franche-ComtéFrance Norwegian Porphyria centre(NAPOS) Haukeland University HospitalNorwegian Organization for Quality Improvement of Laboratory Examinations(Noklus)and Department of Global Public Health and Primary CareFaculty of MedicineUniversity of BergenNorway Institute of Earth Sciences University of LausanneLausanneSwitzerland Staatliches Museum für Naturkunde Stuttgart StuttgartGermany

Examples of photoluminescence(PL)are being reported with increasing frequency in a wide range of organisms from diverse ***,the chemical basis of this PL remains poorly deﬁned,and our understanding of its potential ecological function is still superﬁ*** mammals,recent analyses have identiﬁed free-base por-phyrins as the compounds responsible for the reddish ultraviolet-induced photoluminescence(UV-PL)observed in the pelage of springhares and ***,the localization of the pigments within the hair largely remains to be ***,we use photoluminescence multispectral imaging emission and excitation spec-troscopy to detect,map,and characterize porphyrinic compounds in skin appendages in *** also document new cases of mammalian UV-PL caused by free-base porphyrins in distantly related *** distribution of the UV-PL is strongly suggestive of an endogenous origin of the porphyrinic *** argue that reddish UV-PL is predominantly observed in crepuscular and nocturnal mammals because porphyrins are ***-sequently,this phenomenon may not have a speciﬁc function in intra-or interspeciﬁc communication but rather represents a byproduct of potentially widespread physiological processes.

关键词： in situ analysis mammal multispectral imaging porphyrin UV photoluminescence

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于循环结构的视觉transformer

吉林大学学报（工学版） 2024年第7期54卷 2049-2056页

作者：蒋磊王子其崔振宇常志勇时小虎莫斯科国立大学数学力学系莫斯科119991 莫斯科国立大学计算数学与控制理论系莫斯科119991 吉林大学生物与农业工程学院长春130022 吉林大学工程仿生教育部重点实验室长春130022 吉林大学计算机科学与技术学院长春130012 吉林大学符号计算与知识工程教育部重点实验室长春130012

针对视觉transformer(Vision transformer,Vit)性能的提升依赖于网络的参数量,从而导致其应用场景受限的缺点,本文从神经学得到启发,创新性地提出将人脑神经元之间的循环结构应用在Vit上。文中首次从黎曼几何的角度解释了循环结构生效... 详细信息

针对视觉transformer(Vision transformer,Vit)性能的提升依赖于网络的参数量,从而导致其应用场景受限的缺点,本文从神经学得到启发,创新性地提出将人脑神经元之间的循环结构应用在Vit上。文中首次从黎曼几何的角度解释了循环结构生效的工作原理,之后以token-to-token transformer(t2t transformer)为主干框架提出了基于循环结构的Vit。实验结果表明:循环结构的引入能在视觉transformer参数量基本不变化的情况下大幅提高其性能,使用循环结构后,在Imagenet分类数据集下网络仅增加0.14%的参数,但带来9%的分类精度提升;在目标检测任务中,增加0.1%的参数带来10.7%的性能提升。

关键词：视觉transformer 循环结构黎曼几何

Brain tumor Diagnosis Using Sparrow Search Algorithm Based Deep Learning Model

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

computer Systems Science & Engineering 2023年第2期44卷 1793-1806页

作者： G.Ignisha Rajathi R.Ramesh Kumar D.Ravikumar t.Joel Seifedine Kadry chang-Won Jeong Yunyoung Nam Department of computer Science and Business Systems Sri Krishna College of Engineering and TechnologyCoimbatore641008India Department of Information technology Sri Krishna College of TechnologyCoimbatore641008India Department of Electronics and communication Engineering Kings Engineering CollegeChennai602117India Department of Electronics and communication Engineering R.M.K.Engineering CollegeChennai601206India Deparmtent of Applied Data Science Noroff University CollegeKristiansandNorway Medical convergence Research center Wonkwang UniversityIksanKorea Department of computer Science and Engineering Soonchunhyang UniversityAsanKorea

Recently,Internet of Medical things(IoMt)has gained considerable attention to provide improved healthcare services to *** earlier diag-nosis of brain tumor(Bt)using medical imaging becomes an essential task,auto-mated IoMt and cloud enabled Bt diagnosis model can be devised using recent deep learning *** this motivation,this paper introduces a novel IoMt and cloud enabled Bt diagnosis model,named *** IoMtc-HDBt model comprises the data acquisition process by the use of IoMt devices which captures the magnetic resonance imaging(MRI)brain images and transmit them to the cloud ***,adaptive windowﬁltering(AWF)based image preprocessing is used to remove *** addition,the cloud server executes the disease diagnosis model which includes the sparrow search algorithm(SSA)with GoogleNet(SSA-GN)*** IoMtc-HDBt model applies functional link neural network(FLNN),which has the ability to detect and classify the MRI brain images as normal or ***ﬁnds useful to generate the reports instantly for patients located in remote *** validation of the IoMtc-HDBt model takes place against BRAtS2015 challenge dataset and the experimental analysis is car-ried out interms of sensitivity,accuracy,and speciﬁ*** experimentation out-come pointed out the betterment of the proposed model with the accuracy of 0.984.

关键词： Internet of medical things healthcare brain tumor disease classiﬁcation deep learning metaheuristics

State of Science:Why Does Rework Occur in construction?What Are Its consequences?And What can be Done to Mitigate Its Occurrence?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Engineering 2022年第11期18卷 246-258页

作者： peter E.D.Love Jane Matthews Michael c.P.Sing Stuart R.Porter Weili Fang School of civil and Mechanical Engineering Curtin UniversityPerthWA 6845Australia School of Architecture and Built Environment Deakin University Geelong Waterfront CampusGeelongVIC 3220Australia School of Architecture and Built Environment The University of NewcastleCallaghanNSW 2308Australia Department of civil and Building Systems Technische Universität BerlinBerlin 13156Germany

there has been a wealth of research that has examined the nature of rework in *** toward addressing the rework problem has been limited-it still plagues practice,adversely impacting a project’s *** all rework studies have focused on determining its proximal or root causes and therefore have overlooked the conditions that result from its *** filling this void,this paper draws upon our previous empirical studies,amongst others,to provide a much-needed theoretical framing to understand better why rework occurs,what its consequences are,and how it can be mitigated during *** theoretical framing we derive from our review provides construction organizations and their projects with a realization that the journey to mitigating rework begins with creating an error-mastery culture comprising authentic leadership,psychological safety,an errormanagement orientation,and *** suggest that,once an error-mastery culture is established within construction organizations and their projects,they will be better positioned to realize the benefits of the techniques,tools,and technologies espoused to address rework,such as the Last Planner® and building information *** also provide directions for future research and identify implications for practice so that strides toward rework mitigation in construction can be made.

关键词： construction Errors Error-mastery culture Pathogens Rework Violations

花生红衣中反式白藜芦醇对HEK293t细胞抗氧化的影响

在线全文

学校读者我要写书评

暂无评论

中国食品学报 2024年第5期24卷 150-160页

作者：孙畅周春田岳玉兰吕呈蔚李云飞黄威李铁柱胡济美吉林省农业科学院农产品加工研究所长春130033 包头轻工职业技术学院内蒙古包头014035 中国国际工程咨询有限公司北京100048

目的:分析花生红衣中的白藜芦醇成分,探究其主要成分反式白藜芦醇(RES)对人胚胎肾细胞293(HEK293t)抗氧化的影响及其潜在的分子机制。方法:采用超声波辅助酶法提取花生红衣中的白藜芦醇,采用高效液相色谱-质谱联用(HPLc-MS)技术分析花... 详细信息

目的:分析花生红衣中的白藜芦醇成分,探究其主要成分反式白藜芦醇(RES)对人胚胎肾细胞293(HEK293t)抗氧化的影响及其潜在的分子机制。方法:采用超声波辅助酶法提取花生红衣中的白藜芦醇,采用高效液相色谱-质谱联用(HPLc-MS)技术分析花生红衣中白藜芦醇粗提液的组成成分。通过测定细胞活力,检测RES对HEK293t细胞的最高毒性。通过荧光素酶报告基因试验及免疫印迹试验检测其对Keap1-Nrf2-ARE抗氧化信号通路的影响,以DPPH自由基清除率评价其体外抗氧化能力。结果:HPLc-MS结果表明,花生红衣中含有白藜芦醇苷、白皮杉醇和RES。由于白藜芦醇在自然界中主要以反式白藜芦醇形式存在,因此选择RES进行后续试验。细胞存活力检测结果表明,RES对HEK293t细胞的最高无毒浓度为50μmol/L,体外抗氧化作用呈浓度依赖性。荧光素酶报告基因分析表明,RES显著诱导了ARE介导的转录激活。免疫印迹结果显示,RES能诱导Nrf2介导的3个抗氧化蛋白表达【血红素氧合酶1(HO-1)、醌氧化还原酶1(NQO1)和谷氨酸半胱氨酸连接酶(GcLM)】表达。此外,DPPH自由基清除率测定结果表明,RES能有效清除DPPH自由基,具有体外抗氧化能力。结论:花生红衣中白藜芦醇的主要成分RES对HEK293t细胞有抗氧化作用,可通过Keap1-Nrf2-ARE信号通路激活潜在的抗氧化活性。

关键词：花生红衣白藜芦醇 HEK293t 高效液相色谱-质谱联用 Keap1-Nrf2-ARE信号通路抗氧化

同方期刊数据库

基于氘代二甲基亚砜(DMSO-d_(6))实现吲哚c(2)位选择性甲硫基化与三氘甲硫基化反应

在线全文

学校读者我要写书评

暂无评论

有机化学 2024年第5期44卷 1576-1583页

作者：张娟王奕森田钰徐晶高文超常宏宏孟凡会杨朋太原理工大学生物医学工程学院太原030024 山西天宏达安医药科技有限公司山西晋中030600 太原理工大学省部共建煤基能源清洁高效利用国家重点实验室太原030024 山东师范大学化学化工与材料科学学院济南250014

发展了一种cu(OAc)_(2)介导吲哚衍生物的c(2)选择性甲硫基化与三氘甲硫基化反应.该转化以二甲基亚砜(DMSO)作为甲硫基来源与溶剂,以中等至良好收率得到c(2)-甲硫基取代吲哚,当选用DMSO-d_(6)作为反应试剂时,也可合成得到c(2)-三氘甲硫... 详细信息

发展了一种cu(OAc)_(2)介导吲哚衍生物的c(2)选择性甲硫基化与三氘甲硫基化反应.该转化以二甲基亚砜(DMSO)作为甲硫基来源与溶剂,以中等至良好收率得到c(2)-甲硫基取代吲哚,当选用DMSO-d_(6)作为反应试剂时,也可合成得到c(2)-三氘甲硫基取代吲哚.同时,该反应不依赖于高温条件,转化可能涉及自由基途径.

关键词：铜吲哚三氘甲硫基化甲硫基化二甲基亚砜(DMSO)

Fast numerical generation and hybrid encryption of a computer-generated Fresnel holographic video sequence

在线全文

学校读者我要写书评

暂无评论

chinese Optics Letters 2013年第2期11卷 27-31页

作者： peter tsang K.W.-K. cheung t.-c. Poon Department of Electronic Engineering City University of Hong KongTat Chee AvenueKowloon Bradley Department of Electrical and computer Engineering Virginia TechUSA Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences

Research demonstrates that a Fresnel hologram can be generated and simultaneously encrypted numerically based on a secret symmetric key formed by the maximal length sequence （M-sequence）. the method can be directly extended to encrypt a video holographic clip in a frame-by-frame manner. However, given the limited combination of signals in the family of M-sequence, hacking the secret key through trial and error can be time consuming but not difficult. In this letter, we propose a method that is difficult to crack with brute force for enerypting a holographic video sequence. An M-sequence is first randomly assigned to enerypt each frame of the holographic video signal. Subsequently, the index of the selected M-sequence, which is necessary to decrypt the hologram~ is encrypted with the RSA algorithm before transmitting to the receiving end. At the receiving end, the decoder is provided with a private key to recover the index for each frame, and the corresDonding M-se（mence is used to decrvDt the encoded hologram.

关键词： Access control computer generated holography cryptography Personal computing Video recording

Management of symptomatic neuromas:a narrative review of the most common surgical treatment modalities in amputees

在线全文

学校读者我要写书评

暂无评论

Plastic and Aesthetic Research 2022年第1期9卷 120-132页

作者： Sahand c.Eftekari peter J.Nicksic Allison J.Seitz D’Andrea t.Donnelly Aaron M.Dingle Samuel O.Poore Division of Plastic Surgery University of Wisconsin School of Medicine and Public HealthG5-347 Clinical Sciences CenterMadisonWI 53711USA

Symptomatic neuromas are an all-too-common complication following limb amputation or extremity trauma,leading to chronic and debilitating pain for *** resection of symptomatic neuromas has proven to be the superior method of intervention,but traditional methods of neuroma resection do not address the underlying pathophysiology leading to the formation of a future symptomatic neuroma and lead to high reoperation *** approaches employ the physiology of peripheral nerve injury to harness the regeneration of nerves to their *** review explores the underlying pathophysiology of neuroma formation and centralization of pain *** compares the traditional surgical approach for symptomatic neuroma resection and describes three novel surgical strategies that harness this pathophysiology of neuroma formation to their *** traditional resection of symptomatic neuromas is currently the standard of care for amputation patients,but new techniques including the regenerative peripheral nerve interface,targeted muscle reinnervation,and intraosseous transposition have shown promise in improving patient pain outcomes for postamputation pain and residual limb *** neuromas are a chronic and debilitating complication following amputation procedures and trauma,and the current standard of care does not address the underlying pathophysiology leading to the formation of the *** techniques are under development that may provide improved patient pain outcomes and a higher level of care for symptomatic neuroma resection.

关键词： Neuromas regenerative peripheral nerve interface targeted muscle reinnervation osseointegrated neural interface amputation