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Efficient Grad-Cam-Based Model for COVID-19 Classification and Detection

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Computer Systems Science & Engineering 2023年第3期44卷 2743-2757页

Corona Virus(COVID-19)is a novel virus that crossed an animal-human barrier and emerged in Wuhan,*** now it has affected more than 119 million *** of COVID-19 is a critical task and due to a large number of patients,a shortage of doctors has occurred for its *** this paper,a model has been suggested that not only detects the COVID-19 using X-ray and CT-Scan images but also shows the affected *** classes have been defined;COVID-19,normal,and Pneumonia for X-ray *** CT-Scan images,2 classes have been defined COVID-19 and *** classi-fication purposes,pretrained models like ResNet50,VGG-16,and VGG19 have been used with some *** detecting the affected areas Gradient-weighted Class Activation Mapping(GradCam)has been *** the X-rays and ct images are taken at different intensities,so the contrast limited adaptive histogram equalization(CLAHE)has been applied to see the effect on the training of the *** a result of these experiments,we achieved a maximum validation accuracy of 88.10%with a training accuracy of 88.48%for CT-Scan images using the ResNet50 *** for X-ray images we achieved a maximum validation accuracy of 97.31%with a training accuracy of 95.64%using the VGG16 model.

关键词： Convolutional neural networks(CNN) COVID-19 pre-trained models CLAHE Grad-Cam X-ray data augmentation

Using Capsule Networks for Android Malware Detection Through Orientation-Based Features

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Computers, Materials & Continua 2022年第3期70卷 5345-5362页

作者： Sohail Khan Mohammad Nauman Suleiman Ali Alsaif Toqeer Ali Syed hassan ahmad Eleraky Deanship of Preparatory Year and Supporting Studies Computer Science DepartmentImam Abdulrahman Bin Faisal UniversityDammamSaudi Arabia National University of Computer and Emerging Sciences Pakistan Department of Computer Science Islamic University of MedinaMedinaSaudi Arabia

Mobile phones are an essential part of modern *** two popular mobile phone platforms,Android and iPhone Operating System(iOS),have an immense impact on the lives of millions of *** these two,Android currently boasts more than 84%market ***,any personal data put on it are at great risk if not properly *** the other hand,more than a million pieces of malware have been reported on Android in just 2021 till *** and mitigating all this malware is extremely difficult for any set of human *** to this reason,machine learning-and specifically deep learning-has been utilized in the recent past to resolve this ***,deep learning models have primarily been designed for image *** this line of research has shown promising results,it has been difficult to really understand what the features extracted by deep learning models are in the domain of ***,due to the translation invariance property of popular models based on ConvolutionalNeural Network(CNN),the true potential of deep learning for malware analysis is yet to be *** resolve this issue,we envision the use of Capsule Networks(CapsNets),a state-of-the-art model in deep *** argue that since CapsNets are orientation-based in terms of images,they can potentially be used to capture spatial relationships between different features at different locations within a sequence of *** design a deep learning-based architecture that efficiently and effectively handles very large scale malware datasets to detect Androidmalware without resorting to very deep *** leads tomuch faster detection as well as increased *** achieve state-of-the-art F1 score of 0.987 with an FPR of just 0.002 for three very large,real-world malware *** code is made available as open source and can be used to further enhance our work with minimal effort.

关键词： Malware security Android deep learning capsule networks

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中巴经济走廊及其对区域经济发展的影响

中巴经济走廊及其对区域经济发展的影响

作者： ahmad hassan 华东师范大学

学位级别：硕士

本研究在世界系统理论的框架内挖掘了中国“一带一路”倡议倡议的多元动力,分析了其对地方和全球经济发展的影响。本研究以伊曼纽尔·沃勒斯坦的理论为基础,利用中巴经济走廊作为背景调查,考察了核心、外围和半外围国家对“一带一路”... 详细信息

本研究在世界系统理论的框架内挖掘了中国“一带一路”倡议倡议的多元动力,分析了其对地方和全球经济发展的影响。本研究以伊曼纽尔·沃勒斯坦的理论为基础,利用中巴经济走廊作为背景调查,考察了核心、外围和半外围国家对“一带一路”倡议的作用。本研究包括定性和定量分析,旨在全面了解“一带一路”倡议对经济、文化和政治方面的影响。本研究阐明了“一带一路”倡议的出发点、目标和对于全球发展的重要性。本研究还探讨了“一带一路”倡议下中国与邻国的关系。本研究从世界体系理论的核心概念——核心、外围和半外围出发分析其在“一带一路”倡议中的应用,为研究“一带一路”背景下中国与沿线国家开展互利共赢的合作提供一个分析框架。本研究采用了定性方法、背景调查分析和宏观经济指标的定量评估。总的来看,“一带一路”倡极大地鼓励了沿线国家参与的热情,尤其是,从巴基斯坦来看,对GDP增长率、贸易额和外国直接投资流入的定量分析表明,中巴经济走廊对巴基斯坦经济的发展有较大的促进作用。本研究以世界体系背景下核心、外围和半外围国家之间的互动为视角强调了中国作为倡议并推动“一带一路”的核心国家所做的整体努力,以及巴基斯坦作为受援国和捐助者的外围角色,以及相关邻国的半外围角色等如何进行互动。本研究分析了在“一带一路”及中巴经济走廊对中巴经济合作及其对地区经济发展的影响。最后,本研究强调了“一带一路”倡议对重塑全球经济格局、推进可持续发展以及促进区域间经济合作的积极意义,尤其是对于中巴经济走廊未来的发展及中巴经济合作提出了前瞻性的分析。

关键词：一带一路世界体系理论中巴经济走廊区域合作

Mosque layout desisn： An analytical study of mosque layouts in the early Ottoman period

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Frontiers of Architectural Research 2013年第4期2卷 445-456页

作者： Faris All Mustafa ahmad Sanusi hassan Architectural Engineering Department Salahaddin University Erbil Kurdistan Iraq School of Housing Building and Planning Universiti Sains Malaysia Penang 11800 Malaysia

This study attempts to quantify the influence of spatial configuration on the functional efficiency of mosque layouts in the early Ottoman period. The literature review consists of two parts. The first part is a theoretical study of the relationship between spatial configuration and functional efficiency of mosque layouts. This part highlights the key syntactical characteristics and effect of spatial configuration on the level of functional efficiency using space syntax theory. The second part is an analytical comparative description of the changes and transfor- mations in the configurations of mosque layouts. The architectural styles are classified into six types based on layout designs. The main benchmarks and indicators involved in measuring the functional efficiency of mosque layouts are analyzed using the A-graph 2009 software program, which provides numerical results. This analysis compares entire samples of mosque layout designs for each category. The numerical results indicate the effect of spatial configurations and the functions of mosque layouts. This study shows that mosques with courtyard layouts are accessible, efficient, and flexible in terms of function because of their distinct syntactical and morphological spatial structures.

关键词： Mosque layout Pendentive dome Space syntax Gamma anatysis Spatial configuration Functionat efficiency

Finite element model updating for structural damage detection using transmissibility data

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Earthquake Engineering and Engineering Vibration 2024年第1期23卷 87-101页

作者： ahmad Izadi Akbar Esfandiari Department of Maritime Engineering Amirkabir University of TechnologyTehran 15875-4413Iran

This paper presents a new finite element model updating method for estimating structural parameters and detecting structural damage location and severity based on the structural responses(output-only data).The method uses the sensitivity relation of transmissibility data through a least-squares algorithm and appropriate normalization of the extracted *** proposed transmissibility-based sensitivity equation produces a more significant number of equations than the sensitivity equations based on the frequency response function(FRF),which can estimate the structural parameters with higher *** abilities of the proposed method are assessed by using numerical data of a two-story two-bay frame model and a plate structure *** evaluating different damage cases,the number,location,and stiffness reduction of the damaged elements and the severity of the simulated damage have been accurately *** reliability and stability of the presented method against measurement and modeling errors are examined using error-contaminated *** parameter estimation results prove the method’s capabilities as an accurate model updating algorithm.

关键词： damage detection model updating output-only transmissibility sensitivity equation

Spatial distribution of banana skipper （Erionota thrax L.）（Lepidoptera： Hesperiidae） and its parasitoids in a Cavendish banana plantation, Penang, Malaysia

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Insect Science 2006年第5期13卷 381-389页

作者： JUSTIN N. OKOLLE MASHHOR MANSOR ABU hassan ahmad School of Biological Sciences Universiti Sains Malaysia Minden Penang Malaysia

Spatial distribution of immatures of the banana skipper （Erionota thrax L.） and their parasitisms from three major parasitoids were studied in a Cavendish banana plantation from April 2004 to December 2004. Infestation levels and parasitism of E. thrax life stages were recorded from bunched plants （BP）, flowering plants （FP）, preflowered plants （PF）, broad leaf followers （BLF） and narrow leaf followers （NLF）, as well as on well managed and poorly managed plants. Mean numbers of the immatures and numbers parasitized from the nine blocks in the plantation were fitted to four dispersion indices. Significant numbers of E. thrax immatures and those parasitized by Ooencyrtus erionotae, Cotesia erionotae and Brachymeria albotibialis were recorded from BLF and PF; no eggs were found on BP and FP. Although infestation was higher on well managed plants, only larval parasitism was significantly different. Three of the four indices indicated that eggs and larvae were random while all the indices showed pupae to be clumped. Parasitized eggs and pupae were clumped （4/4 indices） while 3/4 indices revealed a random pattern for parasitized larvae.

关键词： banana phenology dispersion site-specific management within-field distribution

Correlation between structural phase transition and physical properties of Co^(2+)/Gd^(3+)co-substituted copper ferrite

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Journal of Rare Earths 2024年第7期42卷 1344-1353,I0006页

作者： Mohsen Choupani ahmad Gholizadeh School of Physics Damghan UniversityDamghan36716-45667Iran

The doping of the spinel ferrites with selective cations usually improves the properties of the parent *** effect of Co^(2+)/Gd^(3+)co-substitution on the microstructure,optical,and magnetic properties of Cu1-xCoxFe2-xGdxO4 prepared by the citrate-nitrate auto-combustion synthesis was *** of the samples was performed with powder X-ray diffraction(XRD),Raman and Fouriertransform infrared(FTIR)spectroscopy,field-emission scanning electron microscopy,X-ray energydispersive spectroscopy,UV-Vis spectroscopy,and a vibrating sample *** results of XRD,Raman,and FTIR analysis show a gradual structural phase transition from a tetragonal(I41/amd)structure to a cubic(Fd3m)*** bandgap energy of the studied samples is in a range of 1.57-1.75 eV with a minimum in sample x=0.06 and then *** investigations show that the presence of Co^(2+)/Gd^(3+)cations in an octahedral site of the copper ferrite structure could increase saturation magnetization and coercive field from 567.9 Oe and 23.62 emu/g to 929.4 Oe and 28.27 emu/g,respectively.

关键词： Spinel copper ferrite Citrate-nitrate method Structure phase transition Microstructure properties Magnetic properties Rare earths

Rotating effects on the thermophysical properties of a two-dimensional GaAs quantum ring

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Communications in Theoretical Physics 2024年第6期76卷 165-173页

作者： ahmad Ghanbari Department of Physics College of ScienceYasouj UniversityYasoujIran

In this work,we have investigated the rotating effect on the thermodynamic properties of a 2D quantum ***,we have considered the radial potential of a 2D quantum ring and solved the Schrödinger equation in the presence of the Aharonov-Bohm effect and a uniform magnetic field for the considered *** to the solution of the equation,we calculated the eigenvalues and eigenfunctions of the considered *** the calculated energy spectrum,we obtained the partition function and thermodynamic properties of the system,such as the mean energy,specific heat,entropy and free *** results show that the rotating effect has a significant influence on the thermophysical properties of a 2D quantum *** also study other effects of the rotating term:(1)the effect of different values of rotating parameters,and(2)the effect of negative rotation on the thermodynamic properties of the *** results are discussed in detail.

关键词： Schrodinger equation quantum ring rotation effect thermophysical properties

Contribution of public places in proliferation of dengue vectors in Penang Island,Malaysia

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Asian Pacific Journal of Tropical Biomedicine 2017年第3期7卷 183-187页

作者： Alhaji Hamisu Maimusa Abu hassan ahmad Nur Faeza Abu Kassim Hamdan ahmad Hamady Dieng Junaid Rahim School of Biological Sciences Universiti Sains Malaysia11800Pulau PinangMalaysia Vector Control Research Unit School of Biological SciencesUniversiti Sains Malaysia11800Pulau PinangMalaysia Institute of Biodiversity and Environmental Conservation Universiti Malaysia Sarawak94300Kota SamarahanSarawakMalaysia

Objective: To determine abundance, distribution and diversity of potential breeding container habitats of the dengue vectors in public places including schools, restaurants,mosques and parks in southwest areas of Penang Island, ***: Premises at restaurants, schools, parks and mosques were surveyed simultaneously and inspected visually for container habitats and production of immature mosquitoes from March 2015 to March 2016. Abundance(mean ± SE) of breeding containers between sites was compared using One-way ANOVA. Independent sample ttest was used to compare total number of Aedes albopictus(Ae. albopictus) and Aedes aegypti(Ae. aegypti) ***: The surveyed locations yielded a total of 3 741 breeding containers and 19 537 immature mosquitoes from four areas. Concurrent artificial and natural containers produced 78.4% immature Ae. albopictus and 6.3% Ae. aegypti mosquitoes in wet season,with 14.2% Ae. albopictus and 1.1% Ae. aegypti mosquitoes in dry season. Artificial containers accounted for 98.1% of the total containers recorded, with restaurants being the most productive locations(8 012) and schools being the least productive(2 234).Conclusions: It was concluded that public places are good sources of potential container habitats of Aedes mosquitoes in Penang Island, Malaysia and Ae. albopictus has exclusively replaced the home-grown Ae. aegypti even in urban areas. Therefore, treatment of artificial containers in such locations is critical in Aedes mosquito control campaigns during dengue outbreaks.

关键词： Public places Breeding containers Abundance Aedes albopictus Aedes aegypti