检索结果-南通市图书馆

Efficient Data Compression of ECG Signal Based on Modified Discrete Cosine Transform

Computers, Materials & Continua 2022年第6期71卷 4391-4408页

作者： Ashraf Mohamed Ali Hassan Mohammed S.Alzaidi Sherif S.M.Ghoneim waleed El Nahal Electronics and Communications Engineering Department Faculty of EngineeringSinai UniversityArishCO 45511Egypt Department of Electrical Engineering College of EngineeringTaif UniversityTaif21944Saudi Arabia Faculty of Technology and Education Suez UniversitySuez43527Egypt Electronics and Communications Engineering Department Faculty of EngineeringMSA UniversityCO 12585Egypt

This paper introduced an efficient compression technique that uses the compressive sensing(CS)method to obtain and recover sparse electrocardiography(ECG)*** recovery of the signal can be achieved by using sampling rates lower than the Nyquist frequency.A novel analysis was proposed in this *** apply CS on ECG signal,the first step is to generate a sparse signal,which can be obtained using Modified Discrete Cosine Transform(MDCT)on the given *** transformation is a promising key for other transformations used in this search domain and can be considered as the main contribution of this paper.A small number of wavelet components can describe the ECG signal as related work to obtain a sparse *** technique for ECGsignal compression,which is a novel area of research,is *** signals are introduced randomly between any successive beats of the ***-BIH database can be represented as the experimental database in this domain of ***-BIH database consists of various ECG signals involving a patient and standard ECG *** can be considered as the simulation tool used in this *** proposed method’s uniqueness was inspired by the compression ratio(CR)and achieved by *** performance measurement of the recovered signal was done by calculating the percentage root mean difference(PRD),mean square error(MSE),and peak signal to noise ratio(PSNR)besides the calculation of ***,the simulation results indicated that this work is one of the most important works in ECG signal compression.

关键词： Compressive sensing sparse beats of hearts compression ratio percentage root mean difference

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

An Efficient Machine Learning Based Precoding Algorithm for Millimeter-Wave Massive MIMO

引用

Computers, Materials & Continua 2022年第6期71卷 5399-5411页

作者： waleed Shahjehan Abid Ullah Syed Waqar Shah Ayman A.Aly Bassem F.Felemban Wonjong Noh Department of Electrical Engineering University of Engineering and Technology PeshawarPakistan Department of Mechanical Engineering College of EngineeringTaif UniversityTaif21944Saudi Arabia School of Software Hallym UniversityChuncheon24252Korea

Millimeter wave communication works in the 30–300 GHz frequency range,and can obtain a very high bandwidth,which greatly improves the transmission rate of the communication system and becomes one of the key technologies of fifth-generation(5G).The smaller wavelength of the millimeter wave makes it possible to assemble a large number of antennas in a small *** resulting array gain can compensate for the path loss of the millimeter *** this feature,the millimeter wave massive multiple-input multiple-output(MIMO)system uses a large antenna array at the base *** enables the transmission of multiple data streams,making the system have a higher data transmission *** the millimeter wave massive MIMO system,the precoding technology uses the state information of the channel to adjust the transmission strategy at the transmitting end,and the receiving end performs equalization,so that users can better obtain the antenna multiplexing gain and improve the system *** paper proposes an efficient algorithm based on machine learning(ML)for effective system performance in mmwave massive MIMO *** main idea is to optimize the adaptive connection structure to maximize the received signal power of each user and correlate the RF chain and base station *** results show that,the proposed algorithm effectively improved the system performance in terms of spectral efficiency and complexity as compared with existing algorithms.

关键词： MIMO phased array precoding scheme machine learning optimization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IoMT-Based Healthcare Framework for Ambient Assisted Living Using a Convolutional Neural Network

引用

Computers, Materials & Continua 2023年第3期74卷 6867-6878页

作者： waleed T.Al-Sit Nidal A.Al-Dmour Taher M.Ghazal Ghassan F.Issa Department of Computer Engineering Mutah UniversityAl-KarakJordanHigher Colleges of TechnologyDubaiUAE Department of Computer Engineering College of EngineeringMutah UniversityJordan School of Information Technology Skyline University CollegeUniversity City SharjahSharjahUAE Center for Cyber Security Faculty of Information Science and TechnologyUKM43600BangiSelangorMalaysia

In the age of universal computing,human life is becoming smarter owing to the recent developments in the Internet of Medical Things(IoMT),wearable sensors,and telecommunication innovations,which provide more effective and smarter healthcare *** has the potential to shape the future of clinical research in the healthcare *** sensors,patients,healthcare providers,and caregivers can connect through an IoMT network using software,information,and communication *** assisted living(AAL)allows the incorporation of emerging innovations into the routine life events of *** learning(ML)teaches machines to learn from human experiences and to use computer algorithms to“learn”information directly instead of relying on a *** the sample size accessible for learning increases,the performance of the algorithms *** paper proposes a novel IoMT-enabled smart healthcare framework for AAL to monitor the physical actions of patients using a convolutional neural network(CNN)algorithm for fast analysis,improved decision-making,and enhanced treatment *** simulation results showed that the prediction accuracy of the proposed framework is higher than those of previously published approaches.

关键词： Smart healthcare system neural network machine learning

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Endoscopic stapedotomy: Merits and demerits

引用

Journal of Otology 2018年第3期13卷 97-100页

作者： waleed Moneir Ahmed Musaad Abd El-fattah Eslam Mahmoud Mohamed Elshaer Department of Otolaryngology Faculty of Medicine Mansoura University

This work is conducted in Mansoura University Hospitals,Egypt,to show the advantages and disadvantages of endoscopic stapedotomy in comparison to microscopic *** work described has not been published previously nor under consideration for publication *** authors declare that there is no conflict of *** study is a part of a master degree thesis submitted by Eslam Mahmoud as partial fulfillment for a master *** review board approval,Faculty of Medicine-Mansoura University,was obtained for the study(IRB:MS/15.09.49).

关键词： Mansoura University Hospitals Medicine-Mansoura University

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Long-term results of Ahmed glaucoma valve implantation in Egyptian population

引用

International Journal of Ophthalmology(English edition) 2018年第3期11卷 416-421页

作者： Eman Elhefney Tharwat Mokbel waleed Abou Samra Hanem Kishk Tarek Mohsen Amr El-Kannishy Department of Ophthalmology Faculty of Medicine Mansoura University

AIM： To evaluate the long-term results and complications of Ahmed glaucoma valve （AGV） implantation in a cohort of Egyptian patients. METHODS： A retrospective study of 124 eyes of 99 patients with refractory glaucoma who underwent AGV implantation and had a minimum follow-up of 5y was performed. All patients underwent complete ophthalmic examination and intraocular pressure （lOP） measurement before surgery and at ld, weekly for the 1st month, 3, 6mo, and ly after surgery and yearly afterward for 5y. lOP was measured by Goldmann applanation tonometry and/or Tono-Pen. Complications and the number of anti-glaucoma medications needed were recorded. Success was defined as lOP less than 21 mm Hg with or without anti-glaucoma medication and without additional glaucoma surgery. RESULTS： Mean age was 23.1±19.9y. All eyes had at least one prior glaucoma surgery, lOP was reduced from a mean of 37.2±6.8 to 19.2±5.2 mm Hg after 5y follow-up with a reduced number of medications from 2.64±0.59 to 1.81±0.4. Complete and qualified success rates were 31.5% and 46.0% respectively at the end of follow-up. The most common complications were encapsulated cyst formation in 51 eyes （41.1%）, complicated cataract in 9 eyes （7.25%）, recessed tube in 8 eyes （6.45%）, tube exposure in 6 eyes （4.8%） and corneal touch in 6 eyes （4.8%）. Other complications included extruded AGV, endophthalmitis and persistent hypotony. Each of them was recorded in only 2 eyes （1.6%）. ~ CONCLUSION： Although refractory glaucoma is a difficult problem to manage, AGV is effective and relatively safe procedure in treating refractory glaucoma in Egyptian patients with long-term follow-up. Encapsulated cyst formation was the most common complication, which limits successful lOP control after AGV implantation. However, effective complications management can improve the rate of success.

关键词： intraocular pressure Ahmed glaucoma valve refractory glaucoma long-term follow-up of glaucoma Ahmedvalve complications

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Intention to Use Mobile Augmented Reality in the Tourism Sector

引用

Computer Systems Science & Engineering 2021年第5期37卷 187-202页

作者： Malik Khlaif Gharaibeh Natheer Khlaif Gharaibeh Mohammad Ayoub Khan waleed Abdel karim Abu-ain Musab Kasim Alqudah Faculty of Business Jadara UniversityIrbid21110Jordan College of Computer Science&Engineering at Yanbu Taibah UniversityYanbu41911Saudi Arabia College of Computing and Information Technology University of BishaBisha67714Saudi Arabia College of Community Taibah UniversityBadr46354Saudi Arabia

This article examines the main variables that influence the intention to use Augmented Reality(AR)applications in the tourism sector in *** study model has been constructed based on the unified theory of acceptance and the use of technology2(UTAUT2),by incorporating a new construct(aesthetics)to explore the usage intention of Mobile Augmented Reality in Tourism(MART).A questionnaire was used and distributed to a sample of 450 *** were analyzed using the Smart PLS version *** testing 12 hypotheses.29 measurement items were carefully reviewed based on previous studies that were selected to assess the research *** findings revealed that the proposed model elucidates 35.7%of the variance in the users’intention to use *** results also showed that both performance expectancy and aesthetics were found to be the most significant factors at level(0.001).Four variables,respectively,were at level(0.01)which consisted of social influence,facilitating conditions,hedonic motivation,and price *** weakest effect was effort expectancy at level(0.05).As the use of AR has become important for tourists,this study establishes a research base that can be built upon for future *** developers can benefit from the results of this research to design and deliver this service successfully and to ensure that its adoption by users is achieved.

关键词： Intention to use UTAUT2 aesthetics performance expectancy augmented reality social influence effort expectancy MART AR

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence of Internal Combustion Engine Parameters on Gas Leakage through the Piston Rings Area

引用

Modern Mechanical Engineering 2017年第1期7卷 27-33页

作者： waleed Momani Mechanical Engineering Department Faculty of Engineering King Abdulaziz University Rabigh KSA Department of Mechanical Engineering FET Al-Balqa Applied University Amman Jordon

In this work, the influence of internal combustion engine parameters (cylinder-piston clearance, piston head height, the first segment position, gap of the first piston ring and gap of the second piston ring, piston rings’ axial clearance, intake valve debit coefficient) gas leakage from the combustion chamber through the piston rings’ area was investigated. This influence was studied by making an initial forming operation over gas leakage in the analyzed area.

关键词： Piston Clearance Combustion Engine Cylinder-Piston Piston Rings Chamber Gas Leakage

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

To bridge or not to bridge:summary of the new evidence in endovascular stroke treatment

引用

Stroke & Vascular Neurology 2022年第3期7卷 179-181页

作者： Anna Podlasek Permesh Singh Dhillon waleed Butt Iris Q Grunwald Timothy J England Tayside Innovation MedTech Ecosystem(TIME) University of DundeeDundeeUK NIHR Nottingham Biomedical Research Centre University of NottinghamNottinghamUK Interventional Neuroradiology Nottingham University Hospitals NHS TrustNottinghamUK Interventional Neuroradiology University Hospitals Birmingham NHS TrustBirminghamUK Stroke Division of Mental Health and Clinical NeurosciencesSchool of MedicineUniversity of NottinghamNottinghamUK Stroke University Hospitals of Derby and Burton NHS Foundation TrustDerbyUK

WHAT IS ALREADY KNOWN Recently published summaries and meta-analyses of four randomised controlled trials(RCTs)1-5 comparing direct mechan-ical thrombectomy(dMT)and bridging therapy with intravenous(IV)thrombolytics(alteplase)suggested that dMT is non-inferior to bridging therapy to achieve good functional outcome 3 months after stroke(modified Rankin Score 0-2)with the non-inferiority margin(NIM)<−5%.

关键词： intravenous bridging treatment

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Study of Total Dissolved Solids (TDS) Concentrations Factor of SWCC Al-Khobar Plant Seawater Intakes

引用

Computational Water, Energy, and Environmental Engineering（水能与环境工程） 2024年第1期

作者： Ahmed Al-Kubaish Jamal Salama waleed Al-Jurayan

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

Sparse Crowd Flow Analysis of Tawaaf of Kaaba During the COVID-19 Pandemic

引用

Computers, Materials & Continua 2022年第6期71卷 5581-5601页

作者： Durr-e-Nayab Ali Mustafa Qamar Rehan Ullah Khan waleed Albattah Khalil Khan Shabana Habib Muhammad Islam Department of Computer Systems Engineering University of Engineering and TechnologyPeshawarPakistan Department of Computer Science College of ComputerQassim UniversityBuraydahSaudi Arabia Department of Information Technology College of ComputerQassim UniversityBuraydahSaudi Arabia Department of Information Technology and Computer Science Pak-Austria FachhochschuleInstitute of Applied Sciences and TechnologyHaripurPakistan Department of Electrical Engineering College of Engineering and Information TechnologyOnaizah CollegesAl-QassimSaudi Arabia

The advent of the COVID-19 pandemic has adversely affected the entire world and has put forth high demand for techniques that remotely manage crowd-related *** surveillance and crowd management using video analysis techniques have significantly impacted today’s research,and numerous applications have been developed in this *** research proposed an anomaly detection technique applied to Umrah videos in Kaaba during the COVID-19 pandemic through sparse crowd *** theKaaba rituals is crucial since the crowd gathers from around the world and requires proper analysis during these days of the *** Umrah videos are analyzed,and a system is devised that can track and monitor the crowd flow in *** crowd in these videos is sparse due to the pandemic,and we have developed a technique to track the maximum crowd flow and detect any object(person)moving in the direction unlikely of the major *** have detected abnormal movement by creating the histograms for the vertical and horizontal flows and applying thresholds to identify the non-majority *** algorithm aims to analyze the crowd through video surveillance and timely detect any abnormal activity tomaintain a smooth crowd flowinKaaba during the pandemic.

关键词： Computer vision COVID sparse crowd crowd analysis flow analysis sparse crowd management tawaaf video analysis video processing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：