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Detection and identification of S1 and S2 heart sounds using wavelet decomposition method

International Journal of Biomathematics 2015年第6期8卷 141-155页

作者： ali Tavakoli Golpaygani Nahid Abolpour kamran Hassani D. John Doyle Biomedical Engineering DepartmentFaculty of Electrical Mechanical and Construction Engineering Standard Research Institute Karaj Iran Department of Physics and Biomedical EngineeringShiraz University of Medical Sciences Shiraz Iran Department of Biomechanics Science and Research Branch Islamic Azad University Tehran Iran Department of General AnesthesiologyAnesthesiology Institute Cleveland Clinic Abu Dhabi Abu Dhabi UAE

Phonocardiogram （PCG）, the digital recording of heart sounds is becoming increasingly popular as a primary detection system for diagnosing heart disorders and it is relatively inexpensive. Electrocardiogram （ECG） is used during the PCG in order to identify the systolic and diastolic parts manually. In this study a heart sound segmentation algorithm has been developed which separates the heart sound signal into these parts automa- tically. This study was carried out on 100 patients with normal and abnormal heart sounds. The algorithm uses discrete wavelet decomposition and reconstruction to pro- duce PCG intensity envelopes and separates that into four parts： the first heart sound, the systolic period, the second heart sound and the diastolic period. The performance of the algorithm has been evaluated using 14,000 cardiac periods from 100 digital PCG recordings, including normal and abnormal heart sounds. In tests, the algorithm was over93% correct in detecting the first and second heart sounds. The presented automatic seg- mentation Mgorithm using w^velet decomposition and reconstruction to select suitable frequency band for envelope calculations has been found to be effective to segment PCG signals into four parts without using an ECG.

关键词： Phonocardiography auscultation murmurs wavelet decomposition waveletreconstruction segmentation.

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Determining safe yield and mapping water level zoning in groundwater resources of the Neishabour Plain

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Journal of Groundwater Science and Engineering 2023年第1期11卷 47-54页

作者： Parisa Kazerani ali Naghi Ziaei kamran Davari Faculty of Agriculture Ferdowsi University of MashhadKhorasan RazaviIran the Water Science and Engineering Department Faculty of AgricultureFerdowsi University of MashhadKhorasan RazaviIran the Water Engineering Department Faculty of AgricultureFerdowsi University of MashhadKhorasan RazaviIran

Groundwater is a crucial sources of water supply,especially in arid and semi-arid areas around the *** uncontrolled withdrawals and limited availability of these resources,it is essential to determine the safe yield of these valuable *** Hill method approach was used in this study to determine the safe yield the Neishabour aquifer in Khorasan Razvi province in *** results showed that the safe yield in the Neishabour aquifer is 60%lower than the current pumping amounts during the study period,indicating that further overdrafts could result in the destruction of this *** highlights the importance of using the Hill method to estimate the permitted exploitation from other aquifers,thus preventing problems caused by over-extraction and maintaining stability of global groundwater levels.

关键词： Hill method Water level zoning maps Groundwater pumping Safe yield Groundwater crisis

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AI-Driven Energy Optimization in UAV-Assisted Routing for Enhanced Wireless Sensor Networks Performance

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Computers, Materials & Continua 2024年第9期80卷 4085-4110页

作者： Syed kamran Haider Abbas Ahmed Noman Mujeeb Khan ali Nauman Sung Won Kim College of Internet of Things(IoT)Engineering Hohai UniversityChangzhou213001China Department of Electrical and Electronics Engineering Beaconhouse International CollegeIslamabad44000Pakistan School of Computer Science and Engineering Yeungnam UniversityGyeongsan38428Republic of Korea

In recent advancements within wireless sensor networks(WSN),the deployment of unmanned aerial vehicles(UAVs)has emerged as a groundbreaking strategy for enhancing routing efficiency and overall network *** research introduces a sophisticated framework,driven by computational intelligence,that merges clustering techniques with UAV mobility to refine routing strategies in *** proposed approach divides the sensor field into distinct sectors and implements a novel weighting system for the selection of cluster heads(CHs).This system is primarily aimed at reducing energy consumption through meticulously planned routing and path *** a greedy algorithm for inter-cluster dialogue,our framework orchestrates CHs into an efficient communication *** comparative analysis,the proposed model demonstrates a marked improvement over traditional methods such as the cluster chain mobile agent routing(CCMAR)and the energy-efficient cluster-based dynamic algorithms(ECCRA).Specifically,it showcases an impressive 15%increase in energy conservation and a 20%reduction in data transmission time,highlighting its advanced ***,this paper investigates the impact of various network parameters on the efficiency and robustness of the WSN,emphasizing the vital role of sophisticated computational strategies in optimizing network operations.

关键词： UAV trajectory clustering next-generation wireless sensor network(NGWSN) energy efficiency mobile sink

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Spatial Correlation Module for Classification of Multi-Label Ocular Diseases Using Color Fundus Images

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Computers, Materials & Continua 2023年第7期76卷 133-150页

作者： ali Haider Khan Hassaan Malik Wajeeha Khalil Sayyid kamran Hussain Tayyaba Anees Muzammil Hussain Department of Software Engineering Faculty of Computer SciencesLahore Garrison UniversityLahorePakistan Department of Computer Science School of Systems and TechnologyUniversity of Management and TechnologyLahore54000Pakistan Department of Computer Science&Information Technology University of Engineering and Technology(UET)PeshawarPakistan Department of Computer Science TIMES InstituteMultan60000Pakistan Department of Software Engineering School of Systems and TechnologyUniversity of Management and TechnologyLahore54000Pakistan

To prevent irreversible damage to one’s eyesight,ocular diseases(ODs)need to be recognized and treated *** fundus imaging(CFI)is a screening technology that is both effective and *** to CFIs,the early stages of the disease are characterized by a paucity of observable symptoms,which necessitates the prompt creation of automated and robust diagnostic *** traditional research focuses on image-level diagnostics that attend to the left and right eyes in isolation without making use of pertinent correlation data between the two sets of *** addition,they usually only target one or a few different kinds of eye diseases at the same *** this study,we design a patient-level multi-label OD(PLML_ODs)classification model that is based on a spatial correlation network(SCNet).This model takes into consideration the relevance of patient-level diagnosis combining bilateral eyes and multi-label ODs ***_ODs is made up of three parts:a backbone convolutional neural network(CNN)for feature extraction i.e.,DenseNet-169,a SCNet for feature correlation,and a classifier for the development of classification *** DenseNet-169 is responsible for retrieving two separate sets of attributes,one from each of the left and right *** then,the SCNet will record the correlations between the two feature sets on a pixel-by-pixel *** the attributes have been analyzed,they are integrated to provide a representation at the patient *** the whole process of ODs categorization,the patient-level representation will be *** efficacy of the PLML_ODs is examined using a soft margin loss on a dataset that is readily accessible to the public,and the results reveal that the classification performance is significantly improved when compared to several baseline approaches.

关键词： Ocular disease multi-label spatial correlation CNN eye disease

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Association of H pylori cagA and vacA genotypes and IL-8 gene polymorphisms with clinical outcome of infection in Iranian patients with gastrointestinal diseases

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World Journal of Gastroenterology 2006年第32期12卷 5205-5210页

作者： Eskandar Kamali-Sarvestani Abdulah Bazargani Malihe Masoudian kamran Lankarani ali-Reza Taghavi Mehdi Saberifiroozi Department of Immunology and Autoimmune Diseases Research Center Shiraz Medical School Shiraz University of Medical SciencesShirazIran Department of Bacteriology and virology Shiraz Medical School Shiraz University of Medical SciencesShirazIran Department of cellular and molecular sciences Khatam University TehranIran Gastrointestinal and Hepatology Research center Shiraz Medical School Shiraz University of Medical SciencesShirazIran Department of Internal medicine Shiraz Medical School Shiraz University of Medical SciencesShirazIran

AIM： To find out if a functional promoter polymorphism in the IL-8 gene along with cagA status and polymorphisms in vacA gene influence the type of diseases in Iranian patients infected by Hpylori. METHODS： IL-8 -251 A/T polymorphism was genotyped by oligonucleotide allele specific PCR （ASO-PCR） in a sample of 233 patients with Hpylori infection undergoing upper gastrointestinal endoscopy. The presence of cagA gene and polymorphisms in vacA gene was also determined by PCR. Association of these genetic polymorphisms with the development of gastritis, peptic ulcers as well as gastric cancer was tested. RESULTS： When the patients with different clinical manifestations were compared according to the presence of cagA gene or various vacA genotypes, only the vacA genotypes were significantly different among gastritis, peptic ulcer and gastric cancer patients （χ^2= 17.8; P=0.001）. Furthermore, there was a significant difference in the frequency of IL-8 -251 A/T genotypes between patients with gastric cancer and benign diseases （χ^2=10.47;P=0.005） CONCLUSION： The IL-8 -251 A/T polymorphism and the polymorphisms in H pylor/ vacA gene are involved in limiting the infection outcome to gastritis and peptic ulcer or in favoring cancer onset in Iranian patients.

关键词： Interleukin 8 Hpylori Gastric cancer Peptic ulcer Polymorphism

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Numerical study for bio-convection effects on MHD nano-fluid flow past a porous and extending wedge

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Propulsion and Power Research 2023年第4期12卷 584-594页

作者： Bagh ali Muhammad Ilyas Imran Siddique Huizhu Yang Muhammad kamran Ashraf Sohaib Abdal School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhen 518055China Department of Mathematics National College of Business Administration&EconomicsLahore 54660Pakistan Department of Mathematics University of Management and TechnologyLahore 54770Pakistan School of Mathematics Northwest UniversityXi’an 710127China

We explored the insinuations of bio-convection and thermal radiation on nanofluid transportation across stretching permeable wedge with magnetic *** similarity transformation variables are utilized to achieve ordinary differential *** order to tackle the non-linearity of these equations,numerical procedure based on shooting technique and Range Kutta method are harnessed on MATLAB *** and devour is carried out to evaluate the influence of controlling limitations on temperature,velocity,concentration of nanofluids and micro-organisms *** growing strength of thermophoresis and Brownian motion enhance the fluid *** profile volume fraction show decline against higher values of parameters which are Lewis number,unsteadiness and Brownian motion but opposite trend noted against higher value of Williamson and thermophoresis *** skin friction values rise with the growing values of parameter of wedge angle for the moving *** motile organism profile exhibits decrease against growing strength of Peclet number,bioconvection Lewis number,temperature difference and unsteady parameters while opposite behavior has been noted against wedge angle parameter.

关键词： MHD Nanofluid Bioconvection Porous stretching wedge Range Kutta method

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An improved porous media model for nuclear reactor analysis

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Nuclear Science and Techniques 2016年第1期27卷 117-140页

作者： Roozbeh Vadi kamran Sepanloo Schools of Nuclear Safety Research and Radiation Protection Nuclear Science and Technology Research InstituteEnd of North Karegar Ave.P.O.Box:14359-836TehranIran

In this study, two modifications are proposed to mitigate drawbacks of the conventional approach of using the ‘‘Porous Media Model''(PMM) for nuclear reactor analysis. In the conventional approach, whole reactor core simplifies to a single porous medium and also, the resistance coefficients that are essential to using this model are constant values. These conditions impose significant errors and restrict the applications of the model for many cases,including accident analysis. In this article, the procedures for calculating the coefficients are modified by introducing a practical algorithm. Using this algorithm will result in obtaining each coefficient as a function of mass flow ***, the method of applying these coefficients to the reactor core is modified by dividing the core into several porous media instead of one. In this method, each porous medium comprises a single fuel assembly. PMM with these two modifications is termed ‘‘multi-region PMM'' in this study. Then, the multi-region PMM is introduced to a new CFD-based thermo-hydraulic code that is specifically devised for combining with neutronic *** CITVAP code, which solves multi-group diffusion equations, is the selected as the neutronic part for this study. The resulting coupled code is used for simulation of natural circulation in a MTR. A new semi-analytic method,based on steady-state CFD analysis is developed to verify the results of this case. Results demonstrate considerable improvement, compared to the conventional approach.

关键词：多孔介质模型模型分析反应器传统方法应用程序流体力学分析稳态计算 PMM

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Microstructural Evolution of NiTi47.7Cu6.3 Alloy during Hot Deformation

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Journal of Materials Science & Technology 2011年第10期27卷 951-960页

作者： Amir Etaati kamran Dehghani Mining and Metallurgical Eng.Dept. Amirkabir Univ.Tech.

In the present work, the hot workability and microstructural evolution of ***6.3 （at.%） shape memory alloy were investigated by using wedge-rolling test. The wedge specimens were subjected to hot rolling at the temperatures of 700-1000℃. The microstructural evolutions at the strains of 0.05, 0.15, 0.2, 0.25 and 0.3 were then characterized by optical microscopy and scanning electron microscopy （SEM） as well as energy dispersive spectrometry （EDS） technique. Depending on the deformation temperature and strain, the dynamic recrystallization （DRX） could occur, leading to the refining of the microstructure. At low temperatures of 700 and 800℃ there was no sign of DRX at all studied strains. At these temperatures, the formed fine needle-like precipitates pinned the grain boundaries and prevented them from bulging/migration. By contrast, at higher temperatures of 900 and 1000℃, the DRX took place at the critical strains lower than 0.25 and 0.15, respectively. However, at higher temperatures, strain-induced-boundary-migration （SIBM） mechanism resulted in the formation of DRX grains.

关键词： Deformation Wedge rolling test Dynamic recrystallization Ni-rich Nitinol NiTiCu

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Influence of welding speed on corrosion behaviour of friction stir welded AA5086 aluminium alloy

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Journal of Central South University 2016年第6期23卷 1301-1311页

作者： kamran Amini Farhad Gharavi Department of Mechanical Engineering Tiran Branch Islamic Azad University

The plates of AA5086 aluminium alloy were joined together by friction stir welding at a fixed rotation speed of 1000 r/min various welding speeds ranging from 63 to 100 mm/*** behavior of the parent alloy(PA),the heat affected zone(HAZ),and the weld nugget zone(WNZ)of the joints were studied in 3.5%(mass fraction)aerated aqueous Na Cl solution by potentiodynamic polarization and electrochemical impedance spectroscopy(EIS).The corrosion susceptibility of the weldments increases when the welding speed increases to 63 and 100 mm/***,the value of corrosion rate in the weldments is lower than that in the ***,the corrosion current density increases with increasing the welding speed in the HAZ and the *** the contrary,the corrosion potential in the WNZ appears more positive than in the HAZ with decreasing the welding *** WNZ exhibits higher resistance compared to the HAZ and the PA as the welding speed *** results obtained from the EIS measurements suggest that the weld regions have higher corrosion resistance than the parent *** increasing the welding speed,the distribution and extent of the corroded areas in the WNZ region are lower than those of the HAZ *** the HAZ region,in addition to the pits in the corroded area,some cracks can be seen around the corroded areas,which confirms that intergranular corrosion is formed in this *** alkaline localized corrosion and the pitting corrosion are the main corrosion mechanisms in the corroded areas within the weld *** pits are observed within the weld regions.

关键词： friction stir welding aluminum alloy corrosion properties welding speed

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Numerical Modeling of the Stability of Horizontal Multidrain Oil Wells

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China Ocean Engineering 2015年第5期29卷 719-732页

作者： Ayub ELYASI kamran GOSHTASBI Faculty of Engineering Tarbiat Modares University

The stability of the horizontal multidrain wells is a crucial issue and several factors are involved in this matter, including in-situ stresses, magnitude and distribution as well as the mainbore trajectories. In this paper, this issue is evaluated by assuming different circumstances for the above mentioned factors, based on finite difference threedimensional modeling by using the finite difference numerical software, FLAC3 D. The stability of the mainbore and lateral branches is analyzed based on the Normalized Yielded Zone Area（NYZA） criterion, i.e. the ratio of the surrounding yielded cross-sectional area to the initial area of the well. Optimum mud pressures are obtained in the mainbore and lateral branches in different mainbore trajectories under three in-situ stress regimes. In addition, the stability of the junction where the lateral branches are bifurcated from the mainbore is assessed in those situations. The optimum trajectory of the mainbore, in which the junction has obtained the most stable condition, is selected in each stress regime. It was concluded that in the Normal Faulting（NF） stress regime, the mainbore and junction stability varies in relation to the mainbore trajectories, inversely. However, in the other two stress regimes, i.e. Strike Slip（SS） and Reverse Faulting（RF）, the variations of the mainbore and junction stability are in the same trend with respect to the mainbore trajectory deviations.

关键词： multidrain wells in-situ stresses NYZA mainbore lateral branches

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