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Automated brain tumor segmentation on multi-modal MR image using SegNet

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Computational Visual Media 2019年第2期5卷 209-219页

作者： Salma Alqazzaz Xianfang Sun Xin Yang len Nokes School of Engineering Cardiff UniversityCardiffCF24 3AAUK Department of Physics College of Science for WomenBaghdad UniversityBaghdadIraq School of Computer Science and Informatics Cardiff UniversityCardiffCF24 3AAUK

the potential of improving disease detection and treatment planning comes with accurate and fully automatic algorithms for brain tumor ***, a type of brain tumor, can appear at different locations with different shapes and sizes. Manual segmentation of brain tumor regions is not only timeconsuming but also prone to human error, and its performance depends on pathologists’ experience. In this paper, we tackle this problem by applying a fully convolutional neural network SegNet to 3 D data sets for four MRI modalities(Flair, t1, t1 ce, and t2)for automated segmentation of brain tumor and subtumor parts, including necrosis, edema, and enhancing tumor. to further improve tumor segmentation, the four separately trained SegNet models are integrated by post-processing to produce four maximum feature maps by fusing the machine-learned feature maps from the fully convolutional layers of each trained model. the maximum feature maps and the pixel intensity values of the original MRI modalities are combined to encode interesting information into a feature *** the combined feature as input, a decision tree(Dt) is used to classify the MRI voxels into different tumor parts and healthy brain tissue. Evaluating the proposed algorithm on the dataset provided by the Brain tumor Segmentation 2017(BratS 2017)challenge, we achieved F-measure scores of 0.85, 0.81,and 0.79 for whole tumor, tumor core, and enhancing tumor, *** results demonstrate that using SegNet models with 3 D MRI datasets and integrating the four maximum feature maps with pixel intensity values of the original MRI modalities has potential to perform well on brain tumor segmentation.

关键词： brain tumor segmentation multi-modal MRI convolutional neural networks fully convolutional networks decision tree

Impact of Pollutant Concentration and Particle Deposition on the Radiative Flow of Casson-Micropolar Fluid between Parallel Plates

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 665-690页

作者： Ghaliah Alhamzi Badr Saad t.Alkahtani Ravi Shanker Dubey Vinutha Kalleshachar Neelima Nizampatnam Department of Mathematics and Statistics College of ScienceImam Mohammad Ibn Saud Islamic University(IMSIU)Riyadh11564Saudi Arabia Department of Mathematics College of ScienceKing Saud UniversityRiyadh11989Saudi Arabia Department of Mathematics Amity School of Applied SciencesAmity University RajasthanJaipur302002RajasthanIndia Department of Studies in Mathematics Davangere UniversityDavangere577002India Department of Electronics and Communication Engineering Amrita School of EngineeringAmrita Vishwa VidyapeethamBengaluru560035India

Assessing the behaviour and concentration of waste pollutants deposited between two parallel plates is essential for effective environmental *** the effectiveness of treatment methods in reducing pollution scales is made easier by analysing waste discharge *** waste discharge concentration analysis is useful for assessing how effectively wastewater treatment techniques reduce pollution *** study aims to explore the Casson micropolar fluid flow through two parallel plates with the influence of pollutant concentration and thermophoretic particle *** explore the mass and heat transport features,thermophoretic particle deposition and thermal radiation are *** governing equations are transformed into ordinary differential equations with the help of suitable similarity *** Runge-Kutta-Fehlberg’s fourthfifth order technique and shooting procedure are used to solve the reduced set of equations and boundary *** integration of a neural network model based on the Levenberg-Marquardt algorithm serves to improve the accuracy of predictions and optimize the analysis of *** outcomes are displayed to analyze the characteristics of the relevant dimensionless parameters in the current *** reveal that concentration upsurges as the micropolar parameter *** concentration reduces with an upsurge in the thermophoretic *** upsurge in the external pollutant source variation and the local pollutant external source parameters enhances mass *** surface drag force declines for improved values of porosity and micropolar parameters.

关键词： Micropolar fluid thermal radiation porous medium thermophoretic particle deposition waste discharge concentration

the Development of Advanced Polymer Composites in Civil Engineering An Overview of the European Scene

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工业建筑 2004年第Z1期34卷 -页

作者： len Hollaway School of Engineering - Civil Engineering University of Surrey Guildford Surrey UK.

In the construction industry there has always been a mismatch between the research investment and construction expenditure and this has lead the industry to proceed on a scale with an inadequate understanding of many aspects of construction, such as, deterioration mechanism for structures that has often meant that due allowance has not been made for practical repair and ***, notwithstanding this situation there have been encouraging signs that within the last twenty years the transition from the conventional materials to the more advanced materials is being spear-headed by the construction industry where over 30％ of all polymers produced are now utilised in that industry.

关键词： Civil Engineering construction industry advanced materials

Synthesis of a novel uridine analogue and its use in attempts to form new cyclonucleosides using ring-closing metathesis

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Science China Chemistry 2010年第9期53卷 1932-1936页

作者： MONDON Martine len Christophe UMR 6514 Université de Poitiers CNRS Synthèse et Réactivité des Substances Naturelles EA4297 Université de technologie de Compiègne UtC-Ecole Supérieure de Chimie Organique et Minérale ESCOM

One novel nucleoside analogue having a hex-5-enyl group and an allyl group in the 5'-C and 3-N position was synthesized regioand diastereoselectively from D-glucose in twelve *** order to reach a particular conformation of nucleosides the nucleoside formation of restricted cyclonucleoside analogues was studied via Ring-Closing Metathesis.

关键词： nucleoside restrictedconformation metathesis

transport mechanism in chemically reactive hybrid nanofluid flow containing gyrotactic micro-organisms over a curved oscillatory surface

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 177-192页

作者： M.NAVEED M.IMRAN t.ASGHAR Z.ABBAS Department of Mathematics Division of Science and TechnologyUniversity of Education Department of Mathematics The Islamia University of Bahawalpur

this paper examines the transport analysis, including both heat transfer and mass transfer, in hybrid nanofluid flow containing gyrotactic microorganisms towards a curved oscillatory surface. the influence of magnetic fields is also inspected in terms of their physical characteristics. to depict the phenomena of transport, modified versions of both Fick's and Fourier's laws are used. Additionally, the characteristics of both heterogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate system, the flow problem is formulated as partial differential equations(PDEs)for momentum, concentration, microorganism field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the homotopy analysis method(HAM).the effects of significant flow parameters on the pressure and microorganism fields, velocity, oscillation velocity, concentration, and temperature distributions are shown via graphs. Furthermore, the variations in skin friction, mass transfer rate, heat transfer rate, and local motile number due to different involved parameters are presented in tables and are analyzed in detail. Graphical results indicate that the curves of velocity and temperature fields are enhanced as the values of the solid volume fraction variables *** is also verified that the concentration rate field decreases as the values of the homogeneous reaction strength parameter and the radius of curvature parameter increase, and it increases with the Schmidt number and the heterogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference parameter, and the bio-convective Lewis number.

关键词： Peclet number

the impact of alpha-fetoprotein(AFP),child-turcotte-pugh(CtP)score and disease staging on the survival of hepatocellular carcinoma(HCC)patients:a retrospective cohort from single oncology center

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Oncology Research 2025年第1期33卷 149-160页

作者： NASSER MULLA YOUSEF KAtIB ASIM M.ALMUGHAMSI DUAA S.ALKHAYAt MOHAMED MOSAAD SAMIR t.ALFOtIH RAWAN ALAOFI Department of Internal Medicine Faculty of MedicineTaibah UniversityMadinah42278Saudi Arabia Department of Radiology Faculty of MedicineTaibah UniversityMadinah42278Saudi Arabia Department of Surgery Faculty of MedicineTaibah UniversityMadinah42278Saudi Arabia Department of Endemic and Infectious Diseases Suez Canal UniversityIsmailia41522Egypt King Salman bin Abdulaziz Medical City Madinah42311Saudi Arabia Prince Mohammed Bin Abdulaziz Hospital Madinah41511Saudi Arabia

Background:Hepatocellular carcinoma(HCC)is the most common cause of cancer-related death in Saudi *** study aimed to investigate the patterns of HCC and the effect of tNM staging,Alfa-fetoprotein(AFP),and Child-turcotte Pugh(CtP)on patients’overall survival(OS).Methods:A retrospective analysis was conducted on 43 HCC patients at a single oncology center in Saudi Arabia from 2015 to *** patients had to fulfill one of the following criteria:(a)a liver lesion reported as definitive HCC on dynamic imaging and/or(b)a biopsy-confirmed ***:the mean patient age of all HCC cases was 66.8 with a male-to-female ratio of 3.3:*** patients were stratified into two groups:viral HCC(n=22,51%)and non-viral HCC(n=21,49%).Among viral-HCC patients,55%were due to HBV and 45%due to *** was diagnosed in 79%of *** and sex did not significantly statistically differ in OS among viral and non-viral HCC patients(p-value>0.05).About 65%of patients had tumor size>5 cm during the diagnosis,with a significant statistical difference in OS(p-value=0.027).AFP was>400 ng/ml in 45%of the *** was a statistically significant difference in the OS in terms of AFP levels(p-value=0.021).A statistically significant difference was also observed between the CtP score and OS(p-value=0.02).CtP class B had the longest *** was the most common treatment provided to HCC patients followed by sorafenib *** was a significant statistical difference in OS among viral and non-viral HCC patients(p-value=0.008).Conclusions:the most common predictors for OS were the underlying cause of HCC,AFP,and tumor *** having non-viral etiology,a tumor size>5 cm,an AFP>400 ng/mL,and a CtP score class C were all negatively associated with OS.

关键词： Hepatocellular carcinoma Pattern Alpha-fetoprotein(AFP) Child-turcotte-pugh Progression free survival

Digital Rights Management for a Chinese XML text Centre

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现代图书情报技术 2002年第S1期 172-177页

作者： Wai -man Wong(the open University of Hong Kong Library,Hong Kong,China)

the Electronic text Centre of the openUniversity of Hong Kong(OUHK)has been in full operationsince early *** currently houses 7,300+electronictexts,including free electronic titles,electronic titlespurchased directly from the market,and about,1,000 locallyproduced electronic *** locally produced titles are notavailable in the market but require local digitization andnegotiation with publishers with regard to the right to use(RtU)them so as to meet the learning needs of the ***...

关键词： text Digital Rights Management for a Chinese XML text Centre XML

Weakly Admissible Meshes and Discrete Extremal Sets

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Numerical Mathematics(theory,Methods and Applications) 2011年第1期4卷 1-12页

作者： len Bos Stefano De Marchi Alvise Sommariva Marco Vianello Department of Computer Science University of VeronaStrada Le Grazie 15-37134 VeronaItaly Department of Pure and Applied Mathematics University of PaduaVia Trieste 63-35121 PaduaItaly

We present a brief survey on (Weakly) Admissible Meshes and corresponding Discrete Extremal Sets, namely Approximate Fekete Points and Discrete Leja *** provide new computational tools for polynomial least squares and interpolationon multidimensional compact sets, with different applications such as numerical cubature, digital filtering, spectral and high-order methods for PDEs.

关键词： Weakly admissible meshes Approximate Fekete points Discrete Leja points

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UCCA沙丘美术馆

建筑学报 2019年第1期 68-73页

作者： open建筑事务所 open建筑事务所