检索结果-南通市图书馆

Contrast Normalization Strategies in Brain Tumor Imaging:From Preprocessing to Classification

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

Computer Modeling in Engineering & Sciences 2024年第8期140卷 1539-1562页

作者： Samar M.Alqhtani Toufique A.soomro Faisal Bin Ubaid ahmed Ali Muhammad irfan Abdullah A.Asiri Department of Information Systems College of Computer Science and Information SystemsNajran UniversityNajran61441Saudi Arabia Department of Electronic Engineering The University of LarkanoLarkanaSindh75660Pakistan Computer Science Department Sukkur IBA UniversitySukkurSindh65200Pakistan Eletrical Engineering Department Sukkur IBA UniversitySukkurSindh65200Pakistan Electrical Engineering Department College of EngineeringNajran UniversityNajran61441Saudi Arabia Radiological Sciences Department College of Applied Medical SciencesNajran UniversityNajran61441Saudi Arabia

Cancer-related to the nervous system and brain tumors is a leading cause of mortality in various *** resonance imaging(MRI)and computed tomography(CT)are utilized to capture brain *** plays a crucial role in the diagnosis of brain tumors and the examination of other brain ***,manual assessment of MRI images by radiologists or experts is performed to identify brain tumors and abnormalities in the early stages for timely ***,early diagnosis of brain tumors is intricate,necessitating the use of computerized *** research introduces an innovative approach for the automated segmentation of brain tumors and a framework for classifying different regions of brain *** proposed methods consist of a pipeline with several stages:preprocessing of brain images with noise removal based on Wiener Filtering,enhancing the brain using Principal Component Analysis(PCA)to obtain well-enhanced images,and then segmenting the region of interest using the Fuzzy C-Means(FCM)clustering technique in the third *** final step involves classification using the Support Vector Machine(SVM)*** classifier is applied to various types of brain tumors,such as meningioma and pituitary tumors,utilizing the Contrast-Enhanced Magnetic Resonance Imaging(CE-MRI)*** proposed method demonstrates significantly improved contrast and validates the effectiveness of the classification framework,achieving an average sensitivity of 0.974,specificity of 0.976,accuracy of 0.979,and a Dice Score(DSC)of ***,this method exhibits a shorter processing time of 0.44 s compared to existing *** performance of this method emphasizes its significance when compared to state-of-the-art methods in terms of sensitivity,specificity,accuracy,and *** enhance the method further in the future,it is feasible to standardize the approach by incorporating a set of classifiers to increase the robustness of the brain classi

关键词： Brain tumor magnetic resonance imaging principal component analysis fuzzy c-clustering support vector machine

基于SBAS-InSAR技术的巨野煤田沉降监测

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高技术通讯 2021年第3期31卷 333-340页

作者： irfan ahmed soomro 范宇宾郭唯娜柯长青南京大学地理与海洋科学学院南京210023

矿产资源过度开采极易诱发地面塌陷等地质灾害,对矿区的生产生活造成了严重的威胁。采用2017年5月至2018年11月21景Sentinel-1A数据,设置时间基线(365 d)和空间基线(2371 m)并生成连接图,采用小基线集技术(SBAS)对生成的影像对进行干涉... 详细信息

矿产资源过度开采极易诱发地面塌陷等地质灾害,对矿区的生产生活造成了严重的威胁。采用2017年5月至2018年11月21景Sentinel-1A数据,设置时间基线(365 d)和空间基线(2371 m)并生成连接图,采用小基线集技术(SBAS)对生成的影像对进行干涉处理,通过生成的干涉相位进行地面沉降的参数反演,获取了巨野煤田的形变场和监测点的形变序列。结果发现,巨野煤田发生24 mm以上地面沉降的区域面积占比高达87.12%,而郭屯矿区的地面沉降最为严重,中心沉降量超过70 mm,年沉降速率达到45mm/a。巨野煤田的地面沉降由自然和人为因素造成,其中人为煤炭开采和地下水的过量使用是主要原因。与水准测量的对比结果表明,二者沉降监测的总体趋势吻合。该项研究工作表明,小基线集雷达干涉测量(SBAS-InSAR)技术可以很好地应用于矿区沉降的监测,为合理开采矿产资源和矿区环境保护提供参考依据。

关键词：小基线集雷达干涉测量(SBAS-InSAR) 煤炭开采矿区沉降巨野煤田

Transcriptome analysis reveals immune-related genes in tissues of Vibrio anguillarum-infected turbot Scophthalmus maximus

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2024年第1期42卷 332-344页

作者： Yuting SONG Maqsood ahmed soomro Xianzhi DONG Guobin HU College of Marine Life Sciences Ocean University of ChinaQingdao 266003China Institute of Evolution&Marine Biodiversity Ocean University of ChinaQingdao 266003China Institute of Biophysis Chinese Academy of SciencesBeijing 100101China

Turbot Scophthalmus maximus is an important mariculture fish species with high economic ***,the bacterial diseases caused by Vibrio anguillarum infection bring huge economic losses to the turbot aquaculture *** understand the immune response of the turbot against *** infection and to explore novel immune-related genes,the transcriptome analysis of turbot spleen and gills were conducted after *** *** expressed genes(DEGs)were identified in spleen and gill of the turbot amounted to 17261 and 16436,respectively.A large number of immunerelated DEGs were enriched in cytokine-cytokine receptor interaction signaling pathway,and the others by the kyoto encyclopedia of genes and genomes(KEGG)*** gene ontology(GO)classification analysis revealed that *** infection had the greatest effect on biological processes and cellular *** immune-related DEGs were identified in the spleen(cstl.1,egfl6,lamb21,v2rx4,calcr,and gpr78a)and gills(ghra,sh3gl2a,cst12,inhbaa,cxcl8,and il-1b)by heat *** proteinprotein interaction(PPI)networks were constructed to analyze the immune *** results demonstrate that the maturation and antigen processing of major histocompatibility complex(MHC)class II molecule,and calcitonin-or adrenomedullin-regulated physiological activity were important events in the immunity of turbot against *** *** the gills,the protein interactions in TGF-βsignaling pathway,production of inflammatory factors,and endocytosis regulation were most *** research laid a foundation for discovering novel immune-related genes and enriching the knowledge of immune mechanisms of turbot against *** infection.

关键词： Scophthalmus maximus Vibrio anguillarum transcriptome differentially expressed genes immune mechanism

在线全文

学校读者我要写书评

暂无评论

影响MAX相合成及其性能的因素（英文）

Science China Materials 2024年

作者： Maaz Ullah Khan Sumair ahmed soomro Muhammad irfan Jahanger 周延春楚珑晟冯庆国胡春峰 Key Laboratory of Advanced Technologies of Materials Ministry of Education School of Materials Science and Engineering Southwest Jiaotong University School of Materials Science and Engineering Zhengzhou University

MAX相是一类三元化合物,具有层状晶体结构和混合化学键性质(共价-离子-金属键),因而其同时具有陶瓷和金属的特性. MAX相陶瓷展现出与其他传统陶瓷不同的独特性能.在本综述中,我们重点介绍了一些代表性的MAX相合成方法,这些方法具有成本...

MAX相是一类三元化合物,具有层状晶体结构和混合化学键性质(共价-离子-金属键),因而其同时具有陶瓷和金属的特性. MAX相陶瓷展现出与其他传统陶瓷不同的独特性能.在本综述中,我们重点介绍了一些代表性的MAX相合成方法,这些方法具有成本效益和节能潜力.MAX相的纯度、杂质相的形成、微观结构和性能在制备过程中受到许多参数的影响.因此,我们特别强调了各种因素的影响,这些因素会交替削弱材料的制备效率和最终性能.本文总结了起始材料、化学计量比、温度、压力、粒度、孔隙率、微观结构、机械合金化、机械活化、离子辐照和掺杂等多个参数的影响,以揭示它们对MAX相合成和性能的影响.最后,我们探讨了MAX相在商业上的潜在应用,并展望其在工业领域的发展前景.

关键词：

Multi-Objective Vendor Selection Problem of Supply Chain Management Under Fuzzy Environment

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2021年第1期9卷 33-62页

作者： Srikant Gupta irfan Ali Aquil ahmed Department of Statistics and Operations Research Aligarh Muslim UniversityAligarhUPIndia

Survival of a company in today's competitive business environment depends mainly on its supply *** adequate supply chain gives a competitive edge to a ***,which is the initial stage of a supply chain,can be made efficient by making an appropriate selection of *** vendor selection results not only in reduced purchasing costs,decreased production lead time,increased customer satisfaction but also in improved corporate *** general,the vendor selection problem is a multi-objective decision-making problem that involves some quantitative and qualitative ***,we have considered a multi-objective ven-dor selection problem(MOV SP)with three multiple objective goals:minimization of net ordering price,minimization of rejected units and minimization of late delivered *** most of the cases,information about the price of a unit,percentage of rejected units,percentage of late delivered units,vendor rating value and vendor quota flexibil-ity may not be known precisely due to some *** this paper,imprecision in input information is handled by the concept of a simulation technique,where the parameter follows the uniform ***,stochastic,a-cut and ranking function approaches are used to get the crisp value of the simulated data *** four differ-ent algorithms,namely-fuzzy programming,goal programming,lexicographic goal programming and D1-distance algorithm,have been used for solving the *** last,three different types of simulated data sets have been used to illustrate the work.

关键词： Vendor selection problem Trapezoidal fuzzy number α-Cut and ranking function Fuzzy programming Goal programming Lexicographic goal programming

Inducing opto-electronic and spintronic trends in bilayer h-BN through TMO3 clusters incorporation: Ab-initio study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2019年第11期28卷 284-294页

作者： irfan ahmed Muhammad Rafique Mukhtiar ahmed Mahar Abdul Sattar Larik Mohsin Ali Tunio Yong Shuai Mehran University of Engineering and Technology SZABCampusKhairpur Mirs’Pakistan School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China Mehran University of Engineering and Technology JamshoroSindhPakistan

The band structure, magnetism, charge distribution, and optics parameters of TMO3–h-BN hybrid systems are investigated by adopting first-principles study(FPS) calculations. It is observed that the TMO3 clusters add finite magnetic moments to bilayer h-BN(BL/h-BN), thereby making it a magnetic two-dimensional(2D) material. Spin-polarized band structures for various TMO3–BL/h-BN hybrid models are calculated. After the incorporation of TMO3, BL/h-BN is converted into semimetal or conducting material in spin up/down bands, depending on the type of impurity cluster present in BL/h-BN lattice. Optics parameters are also investigated for the TMO3–BL/h-BN complex systems. The incorporation of TMO3 clusters modifies the absorption and extinction coefficient in visible range, while static reflectivity and refraction parameter increase. It can be surmised that the TMO3 substitution in BL/h-BN is a suitable technique to modify its physical parameters thus making it functional for nano/opto-electronic applications, and an experimental approach can be adapted to reinforce the outcomes of this study.

关键词： bilayer h-BN band structure density of states magnetic moments optics

Design and Development of Low-cost Wearable Electroencephalograms (EEG) Headset

在线全文

学校读者我要写书评

暂无评论

Intelligent Automation & Soft Computing 2023年第3期35卷 2821-2835页

作者： Riaz Muhammad ahmed Ali M.Abid Anwar Toufique ahmed soomro Omar AlShorman Adel Alshahrani Mahmoud Masadeh Ghulam Md Ashraf Naif H.Ali Muhammad irfan Athanasios Alexiou Department of Electrical Engineering Sukkur IBA University65200SukkurPakistan Department of Electronic Engineering Quaid-e-Awam University of EngineeringScience and TechnologyLarkana77150Pakistan Faculty of Engineering and AlShrouk Trading Company Najran UniversityNajran61441Saudi Arabia Department of Medical Rehabilitation Sciences-Physiotherapy Program College of Applied Medical SciencesNajran UniversityNajran61441Saudi Arabia Computer Engineering Department Yarmouk UniversityIrbid21163Jordan Pre-Clinical Research Unit King Fahd Medical Research CenterKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Medical Laboratory Technology Faculty of Applied Medical SciencesKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Internal Medicine Medical CollegeNajran UniversityNajran61441Saudi Arabia Electrical Engineering Department College of EngineeringNajran University Saudi ArabiaNajran61441Saudi Arabia Novel Global Community Educational Foundation HebershamNSW 2770AustraliaAFNP Med AustriaWien2770Austria

Electroencephalogram(EEG)is a method of capturing the electrophy-siological signal of the *** EEG headset is a wearable device that records electrophysiological data from the *** paper presents the design and fab-rication of a customized low-cost Electroencephalogram(EEG)headset based on the open-source OpenBCI Ultracortex Mark IV *** electrode placement locations are modiﬁed under a 10–20 standard *** fabricated headset is then compared to commercially available headsets based on the following para-meters:affordability,accessibility,noise,signal quality,and ***,the data is recorded from 20 subjects who used the EEG Headset,and signals were ***,the participants marked the accuracy,set up time,participant comfort,and participant perceived ease of set-up on a scale of 1 to 7(7 being excellent).Thirdly,the self-designed EEG headband is used by 5 participants for slide *** raw EEG signal is decomposed into a series of band sig-nals using discrete wavelet transform(DWT).Lastly,theseﬁndings have been compared to previously reported *** concluded that when used for slide-changing control,our self-designed EEG headband had an accuracy of 82.0 *** also concluded from the results that our headset performed well on the cost-effectiveness scale,had a reduced setup time of 2±0.5 min(the short-est among all being compared),and demonstrated greater ease of use.

关键词： Brain-computer interface EEG consumer-grade accessibility headset

Modular Multilevel Converter with Wireless Magnetic Power Decoupling for Three-phase MV Adjustable-speed Drives

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2022年第5期8卷 1497-1507页

作者： Mohamed Atef Tawfik Mohammad Sameer irfan Ashraf ahmed Joung-Hu Park Department of Electrical Engineering Soongsil UniversitySeoul 156-743South Korea

In this paper,we propose a modular multilevel converter(MMC)with a wireless magnetic power decoupling approach suitable for medium-voltage high-power variable-speed machine *** proposed power decoupling approach is independent of the operating frequency,which solves the issue of wide fluctuations of low-frequency voltage ripple components in submodule(SM)capacitors,especially at low-speed operations without using any ripple power *** wireless magnetic elements reduces the amount of high-voltage insulation between the transformer windings,resulting in a significant reduction in the overall size of the *** basic idea of our proposed approach is to magnetically couple the instantaneous three-phase ripple power of each of the three adjacent-arm *** proposed MMC is free from low-frequency capacitors,resulting in enhanced system reliability,volume,and *** operation principles of the proposed MMC are explained,and a control design is *** performance of the proposed scheme was verified via simulation and experimental tests.

关键词： Modular multilevel converter power decoupling submodule capacitor voltage ripple variable-speed drives wireless high-frequency transformer

Light slowing and all-optical time division multiplexing of hybrid four-wave mixing signal in nitrogen-vacancy center

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第5期29卷 254-259页

作者： Ruimin Wang irfan ahmed Faizan Raza Changbiao Li Yanpeng Zhang School of Science&Key Laboratory for Physical Electronics and Devices of the Ministry of Education&Shaanxi Key Laboratory of Information Photonic Technique Xi’an Jiaotong UniversityXi’an 710049China Department of Physics City University of Hong KongKowloonHong Kong SARChina Electrical Engineering Department Sukkur IBA University65200SindhPakistan

We report the experimental results of hybrid four-wave mixing and fluorescence signals from nitrogen-vacancy(NV)centers in diamond. The fluorescence signals are slowed owing to dark state. The observed delay time of light slowing due to interconversion between NV^- and NV^0 is about 6.4 μs. The relative intensities of read-out signals change with the wavelength and power of writing pulse. Based on light slowing, we present the model of all-optical time division multiplexing. The intensity ratio in different demultiplexed channels is modulated by the wavelength and power of control field. It has potential applications in quantum communication and all-optical network.

关键词： nonlinear optics fluorescence time division multiplexing