检索结果-南通市图书馆

Human Action Recognition Based on Semi-Supervised Learning

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Human Action Recognition Based on Semi-Supervised Learning

作者： ALKALF NAWAF hamad N 华南理工大学

学位级别：硕士

考虑到视频中人的动作速度不同,以及目前视频人的动作识别领域中主流方法不使用未知标签数据信息的现状,本文提出了一种基于半监督学习的多尺度人体行为识别算法框架。首先,本文在视频中提取了长度为L和2L的改进的密集轨道特征,并用hog... 详细信息

考虑到视频中人的动作速度不同,以及目前视频人的动作识别领域中主流方法不使用未知标签数据信息的现状,本文提出了一种基于半监督学习的多尺度人体行为识别算法框架。首先,本文在视频中提取了长度为L和2L的改进的密集轨道特征,并用hog、hof和mbh描述符描述这些轨迹。然后对不同尺度下的视频轨迹进行编码,得到相应的视频表示。在半监督学习下,不同尺度下的视频表示对应于不同的视图。最后,本文利用协同EM算法有效地利用未知标签的视频数据信息,提高模型的适应性和识别效率。本文在KTH和HMDB51两个标准动作数据集进行了大量的实验,验证了算法的有效性。实验结果表明,在HMDB51上,本文方法取得了可以和最新方法相比的方法。而在KTH数据集上本文的方法有一定的优势,取得了较好的识别效果。

关键词：行为识别视频特征提取不同长度半监督学习

A Novel Capability of Object Identification and Recognition Based on Integrated mWMM

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第4期75卷 959-976页

作者： MZeeshan Sarwar Mohammed hamad Alatiyyah Ahmad Jalal Mohammad Shorfuzzaman Nawal Alsufyani Jeongmin Park Department of Computer Science Air UniversityIslamabadPakistan Department of Computer Science College of Sciences and Humanities in AflajPrince Sattam Bin Abdulaziz UniversityAl-KharjSaudi Arabia Department of Computer Science College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia Department of Computer Engineering Tech University of Korea237 Sangidaehak-roSiheung-siGyeonggi-do15073Korea

In the last decade,there has been remarkable progress in the areas of object detection and recognition due to high-quality color images along with their depth maps provided by RGB-D *** enable artificially intelligent machines to easily detect and recognize objects and make real-time decisions according to the given *** cues can improve the quality of object detection and *** main purpose of this research study to find an optimized way of object detection and identification we propose techniques of object detection using two RGB-D *** proposed methodology extracts image normally from depth maps and then performs clustering using the Modified Watson Mixture Model(mWMM).mWMM is challenging to handle when the quality of the image is not ***,the proposed RGB-D-based system uses depth cues for segmentation with the help of *** it extracts multiple features from the segmented *** selected features are fed to the Artificial Neural Network(ANN)and Convolutional Neural Network(CNN)for detecting *** achieved 92.13%of mean accuracy over NYUv1 dataset and 90.00%of mean accuracy for the Redweb_v1 ***,their results are compared and the proposed model with CNN outperforms other state-of-the-art *** proposed architecture can be used in autonomous cars,traffic monitoring,and sports scenes.

关键词： Artificial intelligence convolutional neural network depth images interactive-object detection machine learning

Oral and perioral herpes simplex virus infection type I in a fivemonth- old infant: A case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第3期9卷 685-689页

作者： Ashwag Yagoub Aloyouny hamad Nasser Albagieh Rasha Hamed Al-Serwi Basic Dental Science Department College of DentistryPrincess Nourah bint Abdulrahman UniversityRiyadh 11671RiyadhSaudi Arabia Oral Medicine and Diagnostic Science Department College of DentistryKing Saud UniversityRiyadh 12372RiyadhSaudi Arabia

BACKGROUND Herpes simplex virus(HSV)is a highly infectious pathogen that is easily transmitted via the bodily fluids of an infected *** virus usually affects individuals older than six months of age,and rarely causes lesions or symptoms in younger *** SUMMARY We present the case of a five-month-old healthy girl who presented with painful herpetic gingivostomatitis and perioral *** discuss the pathophysiology of primary HSV infection and the effect of maternal antibodies on the infant’s immune *** addition,we explain the diagnosis,management,and prognosis of HSV infection in young *** This case highlights the importance of early diagnosis and management of HSV infections to decrease the risk of developing severe complications and death.

关键词： Herpetic gingivostomatitis Oral lesions Herpes simplex virus Perioral lesions Infants Case report Herpes simplex virus type 1

Syndecan-1-coating of interleukin-17-producing natural killer T cells provides a specific method for their visualization and analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Diabetes 2017年第4期8卷 130-134页

作者： Anil Kumar Jaiswal Mohanraj Sadasivam Abdel Rahim A hamad Department of Pathology Johns Hopkins UniversitySchool of MedicineBaltimoreMD 21205United States

Natural killer T cells(NKT cells) are innate-like T cells that acquire effector functions while developing in the thymus, polarize into three distinct functional subsets viz. NKT1, NKT2 and NKT17 cells that produce interferon(IFN)-γ, interleukin(IL)-4 and IL-17, respectively. However, there has been no unique surface markers that define each subsets, forcing investigators to use intracellular staining of transcription factors and cytokines in combination of surface markers to distinguish among these subsets. Intracellular staining, however, causes apoptosis and prevents subsequent utilization of NKT cells in functional in vitro and in vivo assays that require viable cells. This limitation has significantly impeded understanding the specific properties of each subset and their interactions with each other. Therefore, there has been fervent efforts to find a specific markers for each NKT cell subset. We have recently identified that syndecan-1(SDC-1; CD138) as a specific surface marker of NKT17 cells. This discovery now allows visualization of NKT17 in situ and study of their peripheral tissue distribution, characteristics of their TCR and viable sorting for in vitro and in vivo analysis. In addition, it lays the ground working for investigating significance of SDC-1 expression on this particular subset in regulating their roles in host defense and glucose metabolism.

关键词： Natural killer T cell NKT17 Syndecan-1 (CD138) Interleukin-17 Body fat

Refinement and estimation of asphalt flow number using partial load history

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Traffic and Transportation Engineering(English Edition) 2022年第1期9卷 120-133页

作者： M.A.Dalhat Khaleel Al-Adham hamad I.Al-Abdul Wahhab Arshad Jamal Department of Transportation and Traffic Engineering College of EngineeringImam Abdulrahman Bin Faisal UniversityDammamSaudi Arabia Department of Civil and Environmental Engineering King Fahd University of Petroleum and MineralsDhahranSaudi Arabia

The effect of tertiary flow length on asphalt concrete(AC) flow number(FN) has been studied in this paper. The standard FN test(AASHTO T378) designated by American Association of State Highway and Transportation Officials(AASHTO) is currently among the widely adopted test for assessing the rutting performance of AC mixtures. The standard adopts the Fracken model(FM) for fitting the permanent deformation curve(PDC), prior to FN estimation. The FN was observed to vary as tertiary flow progresses. The FM, along with other PDC models(MFM-1 and MFM-2) obtained by modifying the FM, was utilized to analyze and minimized this variation. Variation of FN resulted because of mathematization of the PDC data. Instead of representing the actual initiating point of permanent shear deformation of the strain data, estimated values of FN were observed to indicate the inflection points of the fitted parent curve. As per standard FN range suggested by AASHTO T378, the observed variation in FN leads to the situation, where a single asphalt mix specimen can be regarded as appropriate for two different traffic levels, depending on the tertiary flow point at which the test is terminated. Supplementary steps in the FN estimation methods were proposed for refinement of FN values. For the refinement and further standardization of FN value and FN test respectively, FN:T(flow number to test duration ratio) has been recognized as the key and most simple solution. Two potential options for employing FN:T in the estimation of FN have also been highlighted. Several important correlations have been reported herein as well. Comparatively, MFM-1 was found to be more robust in FN:T curve utilization than MFM-2 and FM.

关键词： Road engineering HMA Permanent deformation Flow number Francken model Tertiary flow

Multiple Phase Change Materials for Performance Enhancement of a Solar Dryer with Double Pass Collector

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Energy Engineering 2021年第5期118卷 1483-1497页

作者： Ahmed J.hamad Fawziea M.Hussien Johain J.Faraj Engineering Technical College Middle Technical UniversityBaghdadIraq

The fluctuation in drying temperature influences the food products’quality and drying time significantly during the drying process using an indirect solar *** of the effective methods to reduce these variations in the temperature is based on thermal storage materials to control the drying *** experimental investigation is presented in this study to evaluate the performance of an indirect solar dryer with air double pass using multiple phase change materials(PCM)as thermal storage *** PCMs with different melting points are used to store the available heat energy during peak sunshine periods and reduce the drying temperature *** tests on a food product sample are conducted in three cases,the first was without PCMs using natural *** second and third cases are based on forced convection with and without using multiple PCMs under Baghdad city *** results showed that;approximately a steady temperature of hot drying air was obtained during relatively low ambient temperatures when the dryer was incorporated with multiple *** drying time of the product sample for the natural,forced convection without PCMs and forced with PCMs was 87,72 and 47 h,*** higher performance of the dryer was for the forced convection with *** reduction percentage in drying time was about 17.2%and 46%for the forced convection without and with PCMs respectively compared with natural *** average drying rate for the natural,forced without PCMs and forced convection with PCMs was 0.0093,0.0135 and 0.0172 kg/h,*** enhancement in thermal efficiency of the solar collector and drying chamber with multiple PCMs was 43%and 25.5%,respectively,compared with a typical solar dryer.

关键词： Solar dryer double pass indirect dryer multiple PCM drying rate

Salt Specific Interaction Between RepresentativeHofmeister Salts and Glycine

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

光谱学与光谱分析 2020年第S1期40卷 235-236页

作者： hamad Ashraf GUO Ya-xin ZHANG Yun-hong The Institute of Chemical Physics School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

Traditionally,Hofmeister effect was understood on the basis of hydration abilities of *** studies found short-range structuring effects of ions on water which shifted the attention from ion-water interaction to ion-protein *** this study,ATR-FTIR spectroscopy at different RH is used to study the effect of a representative Kosmotrope(MgSO4),Chaotrope(NH4NO3)and neutral(KCl)salt on *** salting out,salting in and neutral effects of salts on glycine are found aligned with Hofmeister ***,direct interaction of kosmotrope anion(SO2-4)with the glycine is observed experimentally which validates the recent idea of ion-protein *** detailed studies will be needed for deeper insight.

关键词： Hofmeister effect Ion-protein interaction

Synthesis of different-sized gold nanostars for Raman bioimaging and photothermal therapy in cancer nanotheranostics

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中国科学：化学英文版 2017年第9期60卷 1219-1229页

作者： Jie Gao Maria Sanchez-Purra Hao Huang ShunhaoWang Yunan Chen Xuefeng Yu Qian Luo Kimberly hamad-Schifferli Sijin Liu State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences.Beijing 100049 China Department of Engineerfng University of Massachusetts BostonBostonMA 02125United States Institute of Biomedicine and Biotechnology Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMA 02139United States

Gold nanoparticles(AuNPs) have been attractive for nanomedicine because of their pronounced optical ***,we customerized the methods to synthesize two types of gold nanostars,Au nanostars-1 and Au nanostars-2,which have different spire lengths and optical properties,and also spherical *** to nanospheres,gold nanostars were less toxic to a variety of cells,including *** nanostars-1 and Au nanostars-2 also manifested a similar pattern of tissue distribution upon in vivo administration in mice to that of nanospheres,and but reveled less liver retention than *** to their strong absorption in the near-infrared(NIR),Au nanostars-2 induced a strong hyperthermia effect in vitro upon excitation at 808 nm,and elicited a robust photothermal therapy(PTT) efficacy in ablating tumors in a mouse model of orthotopic breast cancer using 4T1 breast cancer ***,Au nanostars-1 showed a great capability to enhance the Raman signal through surface-enhanced Raman spectroscopy(SERS) in 4T1 *** combined results opened a new avenue to develop Au nanostars for cancer imaging and therapy.

关键词： gold nanoparticle, nanostar, surface plasmon resonance, tissue distribution, toxicity profile

Differential diagnosis between autism spectrum disorder and other developmental disorders with emphasis on the preschool period

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

世界儿科杂志:英文版 2023年第8期19卷 715-726页

作者： Taynara Amancio de Lima Patricia Aparecida Zuanetti Marina Estima Neiva Nunes Ana Paula Andrade hamad Department of Neurosciences and Behavioral Sciences Ribeirão Preto Medical SchoolUniversity of São PauloAv.Bandeirantes3900Monte AlegreRibeirão PretoSP14049-900Brazil University Hospital Ribeirão Preto Medical SchoolUniversity of São Paulo(HCFMRP-USP)Ribeirão PretoSPBrazil

Background Neurodevelopmental disorders are a heterogeneous group of conditions that manifest as delays or deviations in the acquisition of expected developmental milestones and behavioral *** spectrum disorder(ASD)is a neurodevelopmental disorder characterized by deficits in communication and social interaction and by repetitive and restricted patterns of behavior,interests and *** aim of this review is to discuss the clinical features of the differential diagnoses of ASD that are prevalent among preschoolers,focusing on their similarities and *** sources The international medical literature search was conducted using PubMed and was revised regarding the subject using single and/or combined keywords as follows:differential diagnosis,preschoolers,diagnostic challenge,attention deficit hyperactivity disorder,intellectual disability,high abilities/giftedness,childhood apraxia of speech,social communication disorder,Landau–Kleffner syndrome,stereotyped movement disorder and excessive screen *** We describe conditions commonly found in clinical practice,taking ASD as a *** addressed converging and divergent aspects of behavior,cognition,communication,language,speech,socialization,and stereotypes for the diagnosis of ASD and other disorders identified as potential differential or comorbid *** The ranking and characterization of symptoms appear to be essential for better understanding the underlying common ground between children with developmental disorders and children with ASD,thus properly diagnosing and directing social,professional,or medication *** detailed discussion adds to the literature since,although ASD differential diagnoses are frequently mentioned and discussed in textbooks and journal articles,they rarely occupy a prominent place as we aimed herein.

关键词： Autism spectrum disorder Clinical features Differential diagnosis Neurodevelopmental disorders Preschool