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An Implementation of Multiscale Line Detection and Mathematical Morphology for Efficient and Precise Blood Vessel Segmentation in Fundus Images

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Computers, Materials & Continua 2024年第5期79卷 2565-2583页

作者： Syed Ayaz Ali Shah aamir Shahzad Musaed Alhussein Chuan Meng Goh Khursheed Aurangzeb Tong Boon Tang muhammad Awais Department of Electrical and Computer Engineering COMSATS University IslamabadAbbottabad CampusAbbottabad22060Pakistan Department of Computer Engineering College of Computer and Information SciencesKing Saud UniversityP.O.Box 51178Riyadh11543Saudi Arabia Faculty of Information and Communication Technology University Tunku Abdul RehmanKampar CampusKampar31900Malaysia Centre for Intelligent Signal and Imaging Research University Teknologi PETRONASBandar Seri IskandarPerak32610Malaysia School of Computing Sciences University of East AngliaNorwichNR47TJUK

Diagnosing various diseases such as glaucoma,age-related macular degeneration,cardiovascular conditions,and diabetic retinopathy involves segmenting retinal blood *** task is particularly challenging when dealing with color fundus images due to issues like non-uniformillumination,low contrast,and variations in vessel appearance,especially in the presence of different ***,the speed of the retinal vessel segmentation system is of utmost *** the surge of now available big data,the speed of the algorithm becomes increasingly important,carrying almost equivalent weightage to the accuracy of the *** address these challenges,we present a novel approach for retinal vessel segmentation,leveraging efficient and robust techniques based on multiscale line detection and mathematical *** algorithm’s performance is evaluated on two publicly available datasets,namely the Digital Retinal Images for Vessel Extraction dataset(DRIVE)and the Structure Analysis of Retina(STARE)*** experimental results demonstrate the effectiveness of our method,withmean accuracy values of 0.9467 forDRIVE and 0.9535 for STARE datasets,aswell as sensitivity values of 0.6952 forDRIVE and 0.6809 for STARE ***,our algorithmexhibits competitive performance with state-of-the-art ***,it operates at an average speed of 3.73 s per image for DRIVE and 3.75 s for STARE *** is worth noting that these results were achieved using Matlab scripts containing multiple *** suggests that the processing time can be further reduced by replacing loops with *** the proposed algorithm can be deployed in real time *** summary,our proposed system strikes a fine balance between swift computation and accuracy that is on par with the best available methods in the field.

关键词： Line detector vessel detection localization mathematical morphology image processing

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希金斯刺盘孢CHIMPB、CHSCH9和CHCOT1基因的功能研究

希金斯刺盘孢CHIMPB、CHSCH9和CHCOT1基因的功能研究

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作者： muhammad aamir sohail 华中农业大学

学位级别：硕士

希金斯刺盘孢是一种半活体营养寄生真菌,可造成包括芸薹属、萝卜属等多种十字花科植物炭疽病。深入研究病原菌的致病分子机制有利于开发新的炭疽病防控靶标及策略。本研究以希金斯刺盘孢ChImpb、ChSch9和ChCot1基因为研究对象,研究其基... 详细信息

希金斯刺盘孢是一种半活体营养寄生真菌,可造成包括芸薹属、萝卜属等多种十字花科植物炭疽病。深入研究病原菌的致病分子机制有利于开发新的炭疽病防控靶标及策略。本研究以希金斯刺盘孢ChImpb、ChSch9和ChCot1基因为研究对象,研究其基因功能。主要研究结果如下:(1)通过同源比较分析发现,在希金斯刺盘孢基因组中存在两个Importin-β基因,分别命名为ChImpb1和ChImb2。ChImpb1蛋白编码841个氨基酸,包含IBN,HeatZ和ARM三个结构域。ChImpb1蛋白编码755个氨基酸,仅仅包含HeatZ结构域。对ChImpb1和ChImb2基因进行敲除和互补等功能研究,发现ChImpb1或ChImb2基因敲除体的菌丝生长减慢、产孢量降低,对渗透压、细胞壁完整性、氧化压力抗性降低,且希金斯刺盘孢致病力显著降低。酵母双杂交结果表明,ChImpb1和ChImb2均能与ChMig2蛋白互作。ChMig2蛋白包含两个C2H2锌指结构域。为明确ChImpb与ChMig2之间的关系,对ChMig2基因进一步敲除,ChMig2敲除转化子表型与ChImpb1、ChImpb2表型类似,在菌丝生长、产孢、渗透压、细胞壁完整性、氧化压力抗性以及毒力方面均有缺陷。因此,从现有结果可以看出,ChImpb1和ChImb2可以与ChMig2互作,可能通过介导ChMig2调控希金斯刺盘孢发育及致病功能。(2)蛋白激酶ChSch9编码897个氨基酸,包含C2、SKc和SK三个保守结构域;聚类分析结果表明,ChSch9属于AGC kinase family,在真菌中很保守。ChSch9基因敲除可导致菌丝形态、生长、产孢缺陷;可降低渗透压、细胞壁完整性和氧化压力抗性。有意思的是,ChSch9基因敲除体对高温的耐受力更强。另外发现,ChSch9可能与pyruvate–acetaldehyde通路有关。ChSch9基因敲除体接种拟南芥叶片,致病力下降;进一步显微观察发现,附着胞和侵染菌丝形成率显著下降。由此可见,ChSch9在真菌侵染及相关结构发育上起重要调控作用。(3)本实验室在前期筛选获得一个致病力减弱的ATMT突变体G323,T-DNA单拷贝插入到丝氨酸/苏氨酸蛋白激酶基因ChCot1上。ChCot1蛋白包含SKc和SK两个结构域。为研究其功能,对该基因进行敲除和互补。表型分析发现,ChCot1敲除体在菌丝生长以及毒力上均有缺陷。

关键词：希金斯刺盘孢拟南芥 ChImpb ChSch9 ChCot1 生长选择压耐受性致病性

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Left bundle branch pacing vs biventricular pacing in heart failure patients with left bundle branch block:A systematic review and meta-analysis

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World Journal of Cardiology 2024年第1期16卷 40-48页

作者： Farah Yasmin Abdul Moeed Rohan Kumar Ochani Hamna Raheel Malik Ali Ehtsham Awan Ayesha Liaquat Arisha Saleem muhammad aamir Nael Hawwa Salim Surani Department of Internal Medicine Yale University School of MedicineNew HavenCT 06511United States Department of Medicine Dow University of Health ScienceKarachi 74200SindhPakistan Department of Medicine SUNNY Upstate Medical UniversitySyracuseNY 13210United States Department of Cardiovascular Medicine Lehigh Valley Heart and Vascular InstituteAllentownPA 18105United States Department of Medicine Cleveland ClinicClevelandOH 44195United States Department of Medicine&Pharmacology Texas A&M UniversityCollege StationTX 77843United States

BACKGROUND Left bundle branch pacing(LBBP)is a novel pacing modality of cardiac resynchronization therapy(CRT)that achieves more physiologic native ventricular activation than biventricular pacing(BiVP).AIM To explore the validity of electromechanical resynchronization,clinical and echocardiographic response of *** Systematic review and Meta-analysis were conducted in accordance with the standard guidelines as mentioned in detail in the methodology *** In our analysis,the success rate of LBBP-CRT was determined to be 91.1%.LBBP CRT significantly shortened QRS duration,with significant improvement in echocardiographic parameters,including left ventricular ejection fraction,left ventricular end-diastolic diameter and left ventricular end-systolic diameter in comparison with *** A significant reduction in New York Heart Association class and B-type natriuretic peptide levels was also observed in the LBBP-CRT group vs BiVP-CRT ***,the LBBP-CRT cohort had a reduced pacing threshold at follow-up as compared to BiVP-CRT.

关键词： Left bundle branch pacing Biventricular pacing QRS duration Left ventricular ejection fraction Heart failure

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A two-branch multiscale spectral-spatial feature extraction network for hyperspectral image classification

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Journal of Information and Intelligence 2024年第3期2卷 224-235页

作者： aamir Ali Caihong Mu Zeyu Zhang Jian Zhu Yi Liu Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education Collaborative Innovation Center of Quantum Information of Shaanxi ProvinceSchool of Artificial IntelligenceXidian UniversityXi'an 710071China school of Electronic Engineering Xidian UniversityXi'an 710071China

In the field of hyperspectral image(HSI)classification in remote sensing,the combination of spectral and spatial features has gained considerable *** addition,the multiscale feature extraction approach is very effective at improving the classification accuracy for HSIs,capable of capturing a large amount of intrinsic ***,some existing methods for extracting spectral and spatial features can only generate low-level features and consider limited scales,leading to low classification results,and dense-connection based methods enhance the feature propagation at the cost of high model *** paper presents a two-branch multiscale spectral-spatial feature extraction network(TBMSSN)for HSI *** design the mul-tiscale spectral feature extraction(MSEFE)and multiscale spatial feature extraction(MSAFE)modules to improve the feature representation,and a spatial attention mechanism is applied in the MSAFE module to reduce redundant information and enhance the representation of spatial fea-tures at *** we densely connect series of MSEFE or MSAFE modules respectively in a two-branch framework to balance efficiency and effectiveness,alleviate the vanishing-gradient problem and strengthen the feature *** evaluate the effectiveness of the proposed method,the experimental results were carried out on bench mark HsI datasets,demonstrating that TBMSSN obtained higher classification accuracy compared with several state-of-the-art methods.

关键词： Hyperspectral image classification Multiscale spectral-spatial information Two-branch architecture

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Multifunctional MXene/Carbon Nanotube Janus Film for Electromagnetic Shielding and Infrared Shielding/Detection in Harsh Environments

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Nano-Micro Letters 2024年第10期16卷 543-560页

作者： Tufail Hassan aamir Iqbal Byungkwon Yoo Jun Young Jo Nilufer Cakmakci Shabbir Madad Naqvi Hyerim Kim Sungmin Jung Noushad Hussain Ujala Zafar Soo Yeong Cho Seunghwan Jeong Jaewoo Kim Jung Min Oh Sangwoon Park Youngjin Jeong Chong Min Koo School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySeobu-ro 2066Jangan-guSuwon-siGyeonggi-do 16419Republic of Korea Department of Materials Science and Engineering Soongsil UniversitySeoul 06978Republic of Korea Institute of Advanced Composite Materials Korea Institute of Science and Technology92 Chudong-roBongdong-eupWanju-gunJeollabuk-do 55324Republic of Korea R&D Center INNOMXENE Co. Ltd.Daejeon 34365Republic of Korea School of Chemical Engineering Sungkyunkwan UniversitySeobu-ro 2066Jangan-guSuwon-siGyeonggi-do 16419Republic of Korea

Multifunctional,flexible,and robust thin films capable of operating in demanding harsh temperature environments are crucial for various cutting-edge *** study presents a multifunctional Janus film integrating highly-crystalline Ti_(3)C_(2)T_(x) MXene and mechanically-robust carbon nanotube(CNT)film through strong hydrogen *** hybrid film not only exhibits high electrical conductivity(4250 S cm^(-1)),but also demonstrates robust mechanical strength and durability in both extremely low and high temperature environments,showing exceptional resistance to thermal *** hybrid Janus film of 15μm thickness reveals remarkable multifunctionality,including efficient electromagnetic shielding effectiveness of 72 dB in X band frequency range,excellent infrared(IR)shielding capability with an average emissivity of 0.09(a minimal value of 0.02),superior thermal camouflage performance over a wide temperature range(−1 to 300℃)achieving a notable reduction in the radiated temperature by 243℃ against a background temperature of 300℃,and outstanding IR detection capability characterized by a 44%increase in resistance when exposed to 250 W IR *** multifunctional MXene/CNT Janus film offers a feasible solution for electromagnetic shielding and IR shielding/detection under challenging conditions.

关键词： MXene/carbon nanotube Janus film Electromagnetic interference shielding Infrared shielding Thermal camouflage Infrared detection

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考虑防洪风险的混凝土坝变形双控指标拟定方法研究

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水电能源科学 2024年第6期42卷 171-174,147页

作者：崔卫天黄耀英方卫华方晨 aamir HAMEED 三峡大学水利与环境学院湖北宜昌443002 水利部南京水利水文自动化研究所江苏南京210000

针对基于典型小概率法拟定大坝监控指标时的失效概率取值偏经验性以及目前变形监控指标未考虑变形变化速率的问题,将大坝变形失效风险与大坝防洪风险(上游来水和泄洪能力)相结合,将失效概率取设计防洪风险,采用典型小概率法拟定了关键... 详细信息

针对基于典型小概率法拟定大坝监控指标时的失效概率取值偏经验性以及目前变形监控指标未考虑变形变化速率的问题,将大坝变形失效风险与大坝防洪风险(上游来水和泄洪能力)相结合,将失效概率取设计防洪风险,采用典型小概率法拟定了关键测点变形监控指标,再基于设计洪水调洪演算库水位及其对应的变形分量变化速率,从而确定变形速率监控指标,提出了考虑防洪风险的混凝土坝变形和变形速率双监控指标的拟定方法。以某服役期高拱坝为例,拟定了典型测点实测变形和变形速率双监控指标,实测变形数据及其变化速率均小于拟定的变形监控指标和变形速率监控指标,这表明该大坝当前变形性态安全可控。

关键词：混凝土坝变形双控指标调洪演算小概率法

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An Optimized Convolution Neural Network Architecture for Paddy Disease Classification

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Computers, Materials & Continua 2022年第6期71卷 6053-6067页

作者： muhammad Asif Saleem muhammad aamir Rosziati Ibrahim Norhalina Senan Tahir Alyas Faculty of Computer Science Universiti Tun Hussein Onn MalaysiaBatu Pahat54000Malaysia School of Electronics Computing and MathematicsUniversity of DerbyDerbyDE221GBUnited Kingdom Department of Computer Science Lahore Garrison UniversityLahore54000Pakistan

Plant disease classification based on digital pictures is *** learning approaches and plant image categorization technologies such as deep learning have been utilized to recognize,identify,and diagnose plant diseases in the previous *** the yield quantity and quality of rice forming is an important cause for the paddy production ***,some diseases that are blocking the improvement in paddy production are considered as an ominous *** Neural Network(CNN)has shown a remarkable performance in solving the early detection of paddy leaf diseases based on its images in the fast-growing era of science and ***,the significant CNN architectures construction is dependent on expertise in a neural network and domain *** approach is time-consuming,and high computational resources are *** this research,we propose a novel method based on Mutant Particle swarm optimization(MUT-PSO)Algorithms to search for an optimum CNN architecture for Paddy leaf disease *** results show that Mutant Particle swarm optimization Convolution Neural Network(MUTPSO-CNN)can find optimumCNNarchitecture that offers better performance than existing hand-crafted CNN architectures in terms of accuracy,precision/recall,and execution time.

关键词： Deep learning optimum CNN architecture particle swarm optimization convolutional neural network parameter optimization

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Fingerprint matching,spoof and liveness detection:classification and literature review

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Frontiers of Computer Science 2021年第1期15卷 179-196页

作者： Syed Farooq ALI muhammad aamir KHAN Ahmed sohail ASLAM Department of Software Engineering University of Management and TechnologyLahore 54770Pakistan Department of Informatics and Systems University of Management and TechnologyLahore 54770Pakistan Department of Computer Science University of Management and TechnologyLahore 54770Pakistan

Fingerprint matching,spoof mitigation and liveness detection are the trendiest biometric techniques,mostly because of their stability through life,uniqueness and their least risk of *** recent decade,several techniques are presented to address these challenges over well-known *** study provides a comprehensive review on the fingerprint algorithms and techniques which have been published in the last few *** divides the research on fingerprint into nine different approaches including feature based,fuzzy logic,holistic,image enhancement,latent,conventional machine learning,deep learning,template matching and miscellaneous *** these,deep learning approach has outperformed other approaches and gained significant attention for future *** reviewing fingerprint literature,it is historically divided into four eras based on 106 referred papers and their cumulative citations.

关键词： computer society template matching fingerprint recognition survey deep learning machine learning

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Design and Implementation of a State-feedback Controller Using LQR Technique

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Computers, Materials & Continua 2022年第11期73卷 2897-2911页

作者： aamir Shahzad Shadi Munshi Sufyan Azam muhammad Nasir Khan Mechanical Engineering Department The University of LahoreLahorePakistan Mechanical Engineering Department Umm Al-Qura UniversityMakkahSaudi Arabia Electrical Engineering Department The University of LahoreLahorePakistan

The main objective of this research is to design a state-feedback controller for the rotary inverted pendulum module utilizing the linear quadratic regulator(LQR)*** controller maintains the pendulum in the inverted(upright)position and is robust enough to reject external disturbance to maintain its *** research work involves three major contributions:mathematical modeling,simulation,and real-time *** design a controller,mathematical modeling has been done by employing the NewtonEuler,Lagrange *** resulting model was nonlinear so linearization was required,which has been done around a working *** the estimation of the controller parameters,MATLAB LQR function has been *** has been performed for the designed controller and it also has been implemented and tested over the real inverted *** the results,it is vivid that the designed controller keeps the inverted pendulum in an upright position and rejects the disturbances and falling under gravitational force by adjusting the rotation of the horizontal link.

关键词： Mathematical modeling linearization linear quadratic regulator(LQR) nonlinear system rotary inverted pendulum

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Effect of ankle versus thigh tourniquets on post-operative pain in foot and ankle surgery

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World Journal of Orthopedics 2024年第2期15卷 163-169页

作者： Ashish Mishra Ahmed Barakat Jitendra Mangwani Jakub Kazda Sagar Tiwatane Sana Mohammed aamir Shaikh Linzy Houchen-Wolloff Vipul Kaushik Department of Trauma and Orthopedics University Hospitals LeicesterLeicester LE15WWUnited Kingdom Department of Trauma and Orthopedics Leicester University Hospitals-NHS TrustLeicester LE15WWLeicestershireUnited Kingdom Academic Team of Musculoskeletal Surgery University Hospitals of Leicester NHS TrustLeicester LE39QPUnited Kingdom Department of Anaesthesia York&Scarborough Teaching Hospitals NHS Foundation TrustNorth Yorkshire YO318HEUnited Kingdom Department of Anaesthesia Royal Free London NHS TrustLondon NW32QGUnited Kingdom Department of Trauma&Orthopaedics Breach Candy Hospital TrustMumbai 400026India Department of Physiotherapy University Hospitals of Leicester NHS TrustLeicester LE39QPUnited Kingdom Department of Anasthesia University Hospitals of Leicester NHS TrustLeicester LE15WWUnited Kingdom

BACKGROUND Tourniquets are commonly used in elective extremity orthopaedic surgery to reduce blood loss,improve visualization in the surgical field,and to potentially reduce surgical *** is a lack of consensus in existing guidelines regarding the optimal tourniquet pressure,placement site,and duration of *** is a paucity of data on the relationship between the site of a tourniquet and postoperative pain in foot and ankle *** To explore the relationship between tourniquet site and intensity of post-operative pain scores in patients undergoing elective foot and ankle *** Retrospective analysis of prospectively collected data on 201 patients who underwent foot and ankle surgery in a single institution was *** tourniquet duration,tourniquet pressure and site,and postoperative pain scores using Visual Analogue Score were collected in immediate recovery,at six hours and at 24 h *** plots were used to analyse the data and to assess for the statistical correlation between tourniquet pressure,duration,site,and pain scores using Pearson correlation *** All patients who underwent foot and ankle surgery had tourniquet pressure of 250 mmHg for ankle tourniquet and 300 mmHg for *** was no correlation between the site of the tourniquet and pain scores in recovery,at six hours and after 24 *** was a weak correlation between tourniquet time and Visual Analogue Score immediately post-op(r=0.14,P=0.04)but not at six or 24 h *** This study shows that there was no statistically significant correlation between tourniquet pressure,site and postop pain in patients undergoing foot and ankle *** choice of using a tourniquet is based on the surgeon's preference,with the goal of minimizing the duration of its application at the operative site.

关键词： Lower limb surgery Tourniquet time Tourniquet pressure Tourniquet site Post-operative pain Pain scores

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