检索结果-南通市图书馆

Efficient Forgery Detection Approaches for Digital Color Images

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

Computers, Materials & Continua 2022年第5期71卷 3257-3276页

作者： Amira Baumy Abeer D.Algarni mahmoud abdalla Walid El-Shafai Fathi E.Abd El-Samie Naglaa F.Soliman Department of Communications High Institute for Engineering and TechnologyAl-Obour Obour CityEgypt Department of Information Technology College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadhSaudi Arabia Department of Electronics and Communications Engineering Faculty of EngineeringZagazig UniversityZagazigSharqia44519Egypt Department of Electronics and Electrical Communications Engineering Faculty of Electronic EngineeringMenoufia UniversityMenoufia32952Egypt Security Engineering Lab Computer Science DepartmentPrince Sultan UniversityRiyadh11586Saudi Arabia

This paper is concerned with a vital topic in image processing:color image forgery detection. The development of computing capabilitieshas led to a breakthrough in hacking and forgery attacks on signal, image,and data communicated over networks. Hence, there is an urgent need fordeveloping efficient image forgery detection algorithms. Two main types offorgery are considered in this paper: splicing and copy-move. Splicing isperformed by inserting a part of an image into another image. On the otherhand, copy-move forgery is performed by copying a part of the image intoanother position in the same image. The proposed approach for splicingdetection is based on the assumption that illumination between the originaland tampered images is different. To detect the difference between the originaland tampered images, the homomorphic transform separates the illuminationcomponent from the reflectance component. The illumination histogramderivative is used for detecting the difference in illumination, and henceforgery detection is accomplished. Prior to performing the forgery detectionprocess, some pre-processing techniques, including histogram equalization,histogram matching, high-pass filtering, homomorphic enhancement, andsingle image super-resolution, are introduced to reinforce the details andchanges between the original and embedded sections. The proposed approachfor copy-move forgery detection is performed with the Speeded Up RobustFeatures (SURF) algorithm, which extracts feature points and feature vectors. Searching for the copied partition is accomplished through matchingwith Euclidian distance and hierarchical clustering. In addition, some preprocessing methods are used with the SURF algorithm, such as histogramequalization and single-mage super-resolution. Simulation results proved thefeasibility and the robustness of the pre-processing step in homomorphicdetection and SURF detection algorithms for splicing and copy-move forgerydetection, respectively.

关键词： Image forgery splicing algorithm copy-move algorithm histogram matching homomorphic enhancement SISR SURF

Proposed Different Signal Processing Tools for Efficient Optical Wireless Communications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第5期71卷 3293-3318页

作者： Hend Ibrahim Abeer D.Algarni mahmoud abdalla Walid El-Shafai Fathi E.Abd El-Samie Naglaa F.Soliman Department of Electronics and Communications Engineering Faculty of EngineeringZagazig UniversityZagazig44519Egypt Department of Information Technology College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadhSaudi Arabia Department of Electronics and Electrical Communications Engineering Faculty of Electronic EngineeringMenoufia UniversityMenoufia32952Egypt Security Engineering Lab Computer Science DepartmentPrince Sultan UniversityRiyadh 11586Saudi Arabia

Optical Wireless Communication(OWC)is a new trend in communication systems to achieve large bandwidth,high bit rate,high security,fast deployment,and low *** basic idea of the OWC is to transmit data on unguided media with *** system requires multi-carrier modulation such as Orthogonal Frequency Division Multiplexing(OFDM).This paper studies optical OFDM performance based on Intensity Modulation with Direct Detection(IM/DD)*** system requires a non-negativity *** paper presents a framework for wireless optical OFDM system that comprises(IM/DD)with different forms,Direct Current biased Optical OFDM(DCO-OFDM),Asymmetrically Clipped Optical OFDM(ACO-OFDM),Asymmetrically DC-biased Optical OFDM(ADO-OFDM),and *** also considers channel coding as a tool for error control,channel equalization for reducing deterioration due to channel effects,and investigation of the turbulence *** evaluation results of the proposed framework reveal enhancement of *** performance of the IM/DD-OFDM system is investigated over different channel models such as AWGN,log-normal turbulence channel model,and ceiling bounce channel *** simulation results show that the BER performance of the IM/DD-OFDM communication system is enhanced while the fading strength is *** results reveal also that Hamming codes,BCH codes,and convolutional codes achieve better BER ***,two algorithms of channel estimation and equalization are considered and *** algorithms include the Least Squares(LS)and the Minimum Mean Square Error(MMSE).The simulation results show that the MMSE algorithm gives better BER performance than the LS algorithm.

关键词： Optical communication systems OWC IM/DD OFDM MMSE LS ADO-OFDM DCO-OFDM ACO-OFDM

Determinations of Amino Acids and Fatty Acids Levels in Date Palm Kernel Flour in Sudan

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Agricultural Science and Technology(A) 2020年第5期10卷 283-289页

作者： Rehab Salih mahmoud abdalla Mohammed Ahmed Hassan Eltayeb Ammar Mohammed Elamin Hassan Abdelrahim Mohamed El Hussein Sudanese Nuclear and Radiological Regulatory Authority Ministry of Higher Education and Scientific ResearchKhartoum 11111Sudan Sudan Academy of Sciences Ministry of Higher Education and Scientific ResearchKhartoum 11111Sudan Sudan Atomic Energy Commission Ministry of Higher Education and Scientific ResearchKhartoum 11111Sudan Central Laboratory Ministry of Higher Education and Scientific ResearchKhartoum 11111Sudan

The aim of this study was the determination of various levels in date palm kernel(DPK)flour for enhancing production performance of animals natural feed in Sudan,in addition to protecting the environment from *** material used is flour of date seeds from the following date varieties:Berkawi,Gandilla,Tamouda,Klmah,Mashreq Wad Khatib,Mashreq Wad *** research was conducted at the following institutions:Geological Research Authority of Sudan,preparation of the DPK;Institute Penyelidikan Produk Halal of University Putra Malaysia,determination of amino acids using high performance liquid chromatography mass spectroscopy mass spectroscopy(HPLC MSMS)fluorescence;University of Medical Sciences and Technology-Sudan,determination of fatty acids using gas chromatography-mass spectrometry(GC-MS).Seeds were collected from various areas of Sudan and from *** seeds were mixed together and they weigh 8 *** preparation includes five steps,namely(1)washing,(2)soaking,(3)flushing,(4)drying,(5)*** flour was then used to determine its contents of amino acids by high performance liquid chromatography-fluorescence detector(HPLC-FLD)and fatty acids by *** of the following amino acids were determined in the sample(percentages in w/w are indicated between parenthesis):hydroxyprofine(0.224),aspartic acid(7.029),serine(6.350),glutamic acid(1.745),glycine(3.183),histicline(0.705),arginine(7.262),threonine(ND),alanine(15.558),proline(4.302),cysteine(34.326),tyrosine(2.070),voline(0.402),methionine(2.989),lysine(4.723),isoleucine(2.203),leucine(4.485),phenylalanine(2.442)while the determined fatty acids are:lauric acid(11.765),tetradecanoic acid(14.214),methyl palmitoleate(16.235),palmitic acid(16.431),cis-10-Heptadecenoic acid,methyl ester(17.253),margaric acid(17.464),linoleic acid(18.183),oleic acid(18.236),stearic acid(18.449),methyl ester(20.106)and arachidic acid(20.308).The seeds of the dates are found to be rich in amino acids as well a

关键词： DPK solid waste nutritional value amino acids fatty acids

Multi-Criteria Prediction Mechanism for Vehicular Wi-Fi Offloading

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第11期69卷 2313-2337页

作者： mahmoud Alawi Raed Alsaqour Abdi abdalla Maha Abdelhaq Mueen Uddin Department of Computer Engineering and IT Faculty of EngineeringZanzibar UniversityZanzibarTanzania Department of Information Technology College of Computing and InformaticsSaudi Electronic UniversityRiyadh93499Saudi Arabia Department of Electronics and Telecommunications Engineering College of ICTUniversity of Dar es SalaamTanzania Department of Information Technology College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadh84428Saudi Arabia Faculty of Science Universiti Brunei DarussalamNegara Brunei Darussalam

The growing demands of vehicular network applications,which have diverse networking and multimedia capabilities that passengers use while traveling,cause an overload of cellular *** scenario affects the quality of service(QoS)of vehicle and non-vehicle ***,wireless fidelity access points Wi-Fi access point(AP)and fourth generation long-term evolution advanced(4G LTE-A)networks are broadly ***-Fi APs can be utilized by vehicle users to stabilize 4G LTE-A ***,utilizing the opportunistic Wi-Fi APs to offload the 4G LTE-A networks in a vehicular ad hoc network environment is a relatively difficult *** condition is due to the short coverage of Wi-Fi APs and weak deployment strategies of *** studies have proposed that offloading mechanisms depend on the historical Wi-Fi connection patterns observed by an interest vehicle in making an offloading ***,depending solely on the historical connection patterns affects the prediction accuracy and offloading ratio of most existing mechanisms even when AP location information is *** present study proposed a multi-criteria wireless availability prediction(MWAP)mechanism,which utilizes historical connection patterns,historical data rate information,and vehicular trajectory computation to predict the next available AP and its expected data capacity in making offloading *** proposed mechanism is decentralized,where each vehicle makes the prediction by *** characteristic helps the vehicle users make a proactive offloading decision that maintains the QoS for different applications.A simulation utilizing MATLAB was conducted to evaluate the performance of the proposed mechanism and benchmark it with related state-of-the-art mechanisms.A comparison was made based on the prediction error and offloading ratio of the proposed mechanism in several *** MWAP mechanism exhibited a lower prediction error(i.e.,below 20%)and higher offloading rat

关键词： Vehicular network markov predictor 4G LTE-A Wi-Fi offloading prediction model heterogeneous network

Repeated Attribute Optimization for Big Data Encryption

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2022年第1期40卷 53-64页

作者： abdalla Alameen Department of Computer Science College of Arts and SciencesPrince Sattam Bin Abdulaziz UniversityAl-KharjSaudi Arabia

Big data denotes the variety,velocity,and massive volume of *** databases are unsuitable to store big data owing to its high *** computing is an optimal solution to process and store big ***,the significant issue lies in handling access control and privacy,wherein the data should be encrypted and unauthorized user access must be restricted through efficient access ***-based encryption(ABE)permits users to encrypt and decrypt ***,for the policy to work in practical scenarios,the attributes must be *** the case of specific policies,it is not possible to avoid attribute repetition even after the application of Boolean optimization approaches to obtain a Boolean *** these policies,there exists a variety of evaluated secret shares for the repeated ***,the calculation of cipher text for these irreducible policies seems to be lengthy and computationally *** address this problem,an improved meta-heuristic-based repeated attributes optimization on cipher-text policy-ABE(CP-ABE)is developed in this ***,the improved meta-heuristic concept is developed in the encryption phase,which returns the optimized single share value of each repeated attribute after considering all the attribute *** optimization process not only minimizes the encryption cost but also the communication ***,the improved sun flower optimization(SFO),called the newly updated SFO(NU-SFO)is used to perform the repeated attribute optimization in ***,the performance evaluation confirms the reliability and robustness of the developed scheme through comparisons with traditional constructions.

关键词： Bigdata repeatedattributeoptimization ciphertextpolicy encryption

Smart Lung Tumor Prediction Using Dual Graph Convolutional Neural Network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Intelligent Automation & Soft Computing 2023年第4期36卷 369-383页

作者： abdalla Alameen Department of Computer Science College of Arts and SciencesPrince Sattam Bin Abdulaziz UniversityKSA

A signiﬁcant advantage of medical image processing is that it allows non-invasive exploration of internal anatomy in great *** is possible to create and study 3D models of anatomical structures to improve treatment outcomes,develop more effective medical devices,or arrive at a more accurate *** paper aims to present a fused evolutionary algorithm that takes advantage of both whale optimization and bacterial foraging optimization to optimize feature *** classiﬁcation process was conducted with the aid of a convolu-tional neural network(CNN)with dual *** of the performance of the fused model is carried out with various *** the initial input Com-puter Tomography(CT)image,150 images are pre-processed and segmented to identify cancerous and non-cancerous *** geometrical,statistical,struc-tural,and texture features are extracted from the preprocessed segmented image using various methods such as Gray-level co-occurrence matrix(GLCM),Histo-gram-oriented gradient features(HOG),and Gray-level dependence matrix(GLDM).To select the optimal features,a novel fusion approach known as Whale-Bacterial Foraging Optimization is *** the classiﬁcation of lung cancer,dual graph convolutional neural networks have been employed.A com-parison of classiﬁcation algorithms and optimization algorithms has been *** to the evaluated results,the proposed fused algorithm is successful with an accuracy of 98.72%in predicting lung tumors,and it outper-forms other conventional approaches.

关键词： CNN dual graph convolutional neural network GLCM GLDM HOG image processing lung tumor prediction whale bacterial foraging optimization

Construction of Customized Bio Incubator and Designing of Tailored Scaffolds for Bone Tissue Engineering from Laboratory Scale Up to Clinical Scale

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2022年第11期10卷 2699-2716页

作者： Soliman abdalla Shiref Kandil Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddahSaudi Arabia Department of Materials Science Institute of Graduate Studies and ResearchAlexandria UniversityAlexandriaEgypt

In order to obtain larger,clinical-scale and practical-scale bone grafts,we have designed both tailored scaffolds and tailored bio incubator with optimal bio-production *** DIC files to Simpleware Scan-IP(Simple-ware-exeter United Kingdom),we have digitally reconstructed segmental additive bone-tissue in order to perform images *** hydroxyapatite and tannin composites have been used in order to get the final bone modules combined for retexturing of segmental bone *** have found that sectioning of bone segment deficiency reorganizations into well disk-shaped design permits one to standardize the cell culture and seeding protocol,to get better *** present study concludes that some techniques with cultured cell in segmental bone grafts in the laboratory can be transferred and clinically used.

关键词： Repairing segmental bone customized scaffolds stem cells designing bio incubator bone engineering

University Learning and Anti-Plagiarism Back-End Services

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第2期66卷 1215-1226页

作者： Manjur Kolhar abdalla Alameen Prince Sattam Bin Abdulaziz University Wadi Ad Dawaser11990Saudi Arabia

Plagiarism refers to the use of other people’s ideas and information without acknowledging the *** this research,anti-plagiarism software was designed especially for the university and its campuses to identify plagiarized text in students’written assignments and laboratory *** proposed framework collected original documents to identify plagiarized text using natural language *** research proposes a method to detect plagiarism by applying the core concept of text,which is semantic associations of words and their syntactic *** on the browser was obtained through Request application programming interface by name ***,and it is stored in a centralized Microsoft database Server.A total of 55,001 data samples were collected from 2015 to ***,we assimilated data from a university website,specifically from the *** network,and arranged the data into students’***,we extracted words from source documents and student documents using the WordNet *** a benchmark dataset consisting of 785 plagiarized text and 4,716 original text data,a significant accuracy of 90.2%was ***,the proposed framework demonstrated better performance than the other available *** students mentioned that working on assignments using the framework was suitable because they were able to work on the assignments in harmony,as per their timeframe and from different network *** framework also recommends procedures that can be used to avoid plagiarism.

关键词： NLP information science text data semantic syntactic analysis

Functionality Aware Dynamic Composition of Web Services

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2021年第1期36卷 201-211页

作者： Mohemmed Sha abdalla Alameen Department of Computer Science College of Arts and SciencePrince Sattam bin Abdulaziz UniversityWadi Al dawaser11991Saudi Arabia

The composition of the web service is a common technique to attain the best results of complex web *** selection of appropriate web services,linking those services in the action flow and attaining the actual functionality of the task are the important factors to be *** though different frameworks and methods have been proposed to dynamically compose web services,each method has its advantage and disadvantage over the *** of the methods give much importance to the Quality of Service(QoS)but fail to achieve the actual functionality after *** paper proposes a functionalityoriented composition technique for composing web ***,this method helps reach the extreme functionality of each web service in the composition towards customer *** from considering the overall QoS of every single service,the non-functional parameters associated with these services are also considered for achieving the expected *** of these nonfunctional parameters has a vital role in the functional performance of the web *** web services that satisfy the non-functional requirements are chosen to form the composition to attain the best *** list of services in the proposed composition method is different from the conventional one,which is composed based on the overall *** non-functional parametric values,the QoS of each web service and the overall QoS after composition are evaluated for the proposed method and experimentally analyzed to prove their advantage over the others.

关键词： Web service service composition quality of service dynamic composition