检索结果-南通市图书馆

Journal of Ocean Engineering and Science 2019年第4期4卷 328-337页

作者： Habib Ullah Muzamil Hussain Naseem Abbas Hassaan Ahmad Mohammed amer Muhammad Noman Faculty of Engineering and Technology University of LahoreLahore 54000Pakistan Department of Mechanical Engineering NFC Institute of Engineering and TechnologyMultan 60000Pakistan School of Mechanical Engineering Chung-Ang UniversitySeoul 06974Republic of Korea Department of Mechanical Engineering National Chiao Tung UniversityHsinchuTaiwan

The tidal power has the potential to play a vital role in a sustainable energy *** main objective of this paper is to investigate the performance and fatigue life of tidal current turbine(TCT)using fluid structure interaction(FSI)*** performance of TCT was predicted using Ansys *** performance curve,pressure distribution on the blade,and velocity streamline were visualized for eight repetitive analyses at different tip speed *** hydrodynamic load calculated from CFD analysis was transferred to FEA model for investigation of the structural response of *** analysis was performed to examine the mode shapes and natural frequencies of *** fatigue analysis were performed and number of cycles and safety factor at different equivalent alternating stresses were *** results of the simulation confirm that the turbine has a maximum value of the coefficient of performance atλ=5,the turbine operating frequency is not close to its natural frequency,and it is safe under the applied fatigue loads with a high factor of safety.

关键词： Tidal current turbine Fluid-structure interaction Fatigue performance Computational Fluid Dynamic Blade element

SBOOSP for Massive Devices in 5G WSNs Using Conformable Chaotic Maps

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6期71卷 4591-4608页

作者： Chandrashekhar Meshram Agbotiname Lucky Imoize Sajjad Shaukat Jamal amer Aljaedi Adel R.Alharbi Department of Post Graduate Studies and Research in Mathematics Jayawanti Haksar Government Post-Graduation CollegeCollege of Chhindwara UniversityBetul460001M.P.India Department of Electrical and Electronics Engineering Faculty of EngineeringUniversity of LagosAkoka100213LagosNigeria Department of Electrical Engineering and Information Technology Institute of Digital CommunicationRuhr University44801BochumGermany Department of Mathematics College of ScienceKing Khalid UniversityAbhaSaudi Arabia College of Computing and Information Technology University of TabukTabuk 71491Saudi Arabia

The commercialization of the fifth-generation(5G)wireless network has *** devices are being integrated into 5G-enabled wireless sensor networks(5GWSNs)to deliver a variety of valuable services to network ***,there are rising fears that 5GWSNs will expose sensitive user data to new security *** secure end-to-end communication,key agreement and user authentication have been ***,when billions of massive devices are networked to collect and analyze complex user data,more stringent security approaches are *** integrity,nonrepudiation,and authentication necessitate special-purpose subtree-based signature mechanisms that are pretty difficult to create in *** address this issue,this work provides an efficient,provably secure,lightweight subtreebased online/offline signature procedure(SBOOSP)and its aggregation(Agg-SBOOSP)for massive devices in 5G WSNs using conformable chaotic *** SBOOSP enables multi-time offline storage access while reducing processing *** a result,the signer can utilize the pre-stored offline information in polynomial *** feature distinguishes our presented SBOOSP from previous online/offline-signing procedures that only allow for one ***,the new procedure supports a secret key during the pre-registration process,but no secret key is necessary during the offline *** suggested SBOOSP is secure in the logic of unforgeability on the chosen message attack in the random ***,SBOOSP and Agg-SBOOSP had the lowest computing costs compared to other contending ***,the suggested SBOOSP outperforms several preliminary security schemes in terms of performance and computational overhead.

关键词： Subtree-based online/offline signature procedure(SBOOSP) 5G WSNs provably secure scheme massive devices conformable chaotic maps

Assessment of Artificial Recharge Test in Jeftlik – Faria Area, West Bank

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 Water Resource and Protection 2011年第3期3卷 186-191页

作者： Marwan Ghanem amer Marei Heinz Hoetzl Leif Wolf Wasim ali Amjad Assi 不详

An artificial recharge test site was selected in the Jeftlik area of the foot prints of the Faria basin, in the Upper Jordan Rift Valley. The artificial pond infiltration type of 26 meters diameter and 2.85 meters depth was used. It is a hyperbolic form of 500 cubic meters volume. The integration parameters of hydrogeological settings, hydrochemical characteristics of allocated water bodies, geophysical investigations and the potentiality of the aquifer system in the area were used for the test area selection. The test site area lies within the shallow Pleistocene aquifer of 30-50 meters saturated thickness. One groundwater well of 19 m distance and two groundwater wells of 1 km far distance were used for the system monitoring. The filled water in the test system comes from the wadi water floods brought by 1.5 km of open canal. The sub-catchment is of 3 km2. The recharge rate within the Pleistocene aquifer was determined. This experiment is tested for the water quality type fillings of the first flushing water floods, the water flood in the middle of the winter season and the pumped water from other wells far away from the experiment.

关键词： Artificial Recharge Jeftlik Area Faria Area Jordan Rift Valley

Health status and health systems financing in the MENA region:roadmap to universal health coverage

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Global Health Research and Policy 2017年第1期2卷 94-106页

作者： Eyob Zere Asbu Maysoun Dimachkie Masri amer Kaissi Health System Financing Division Health Authority Abu DhabiAbu DhabiUnited Arab Emirates Department of Healthcare Administration Trinity UniversitySan AntonioTXUSA

Background:Since the declaration of the Millennium Development Goals(MDGs)in 1990,many countries of the Middle East and North Africa(MENA)region made some improvements in maternal and child health and in tackling communicable *** transition to the global agenda of Sustainable Development Goals brings new opportunities for countries to move forward toward achieving progress for better health,well-being,and universal health *** study provides a profile of health status and health financing approaches in the MENA region and their implications on universal health ***:Time-series data on socioeconomics,health expenditures,and health outcomes were extracted from databases and reports of the World Health Organization,the World Bank and the United Nations Development Program and analyzed using Stata 12 statistical *** were grouped according to the World Bank income *** statistics,tables and charts were used to analyze temporal changes and compare the key variables with global ***:Non-communicable diseases(NCDs)and injuries account for more than three quarters of the disabilityadjusted life years in all but two lower middle-income countries(Sudan and Yemen).Prevalence of risk factors(raised blood glucose,raised blood pressure,obesity and smoking)is higher than global averages and counterparts by income *** health expenditure(THE)per capita in most of the countries falls short of global averages for countries under similar income ***,growth rate of THE per capita has not kept pace with the growth rate of GDP per ***-of-pocket spending(OOPS)in all but the high-income countries in the group exceeds the threshold for catastrophic spending implying that there is a high risk of households getting poorer as a result of paying for health ***:The alarmingly high prevalence of NCDs and injuries and associated risk factors,health spending falling short of the GDP a

关键词： Millennium development Goals(MDGs) Sustainable development Goals(SDGs) Universal health coverage(UHC) Middle East and North Africa(MENA) Health system financing Out-of-pocket spending(OOPS) Health status

Small-animal PET demonstrates brain metabolic change after using bevacizumab in a rat model of cerebral ischemic injury

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2014年第5期30卷 838-844页

作者： Ying Dong Fahuan Song Jianjuan Ma Xuexin He Said amer Weizhong Gu Mei Tian Department of Oncology Department of Nuclear Medicine The Second Affiliated Hospital of Zhejiang University School of Medicine Zhejiang University Medical PET Center Institute of Nuclear Medicine and Molecular Imaging of Zhejiang University Key Laboratory of Medical Molecular Imaging of Zhejiang Province Department of Zoology Faculty of ScienceKafr El Sheikh University Department of Pathology The Children's Hospital of Zhejiang University School of Medicine

ABSTRACT To evaluate the effect of bevacizumab on cerebral ischemia, we used 2-deoxy-2-18F-fluoro-D-glucose （18F-FDG） small-animal positron emission tomography （PET） in the middle cerebral artery occlusion （MCAO） rat model. After baseline neurologic function tests and PET studies, MCAO Sprague-Dawley rats received bevacizumab or normal saline （controls）. Weekly PET imaging and neurologic function tests showed that the 18F-FDG accumulation in the bevacizumab group was similar to that in the controls during the first 2 weeks, but lower than in controls at weeks 3 and 4. However, no difference was found in neurological scores between the groups. The number of von Willebrand factor-positive cells in the bevacizumab group was lower than that in controls. The expression of vascular endothelial growth factor was higher than in controls at week 4. These results suggested that bevacizumab does not influence functional recovery in this model of cerebral ischemia during a 4-week period, but inhibits vascular formation and metabolic recovery, which may be considered in cancer patients with a recent ischemic stroke.

关键词： cerebral ischemia bevacizumab positron emission tomography cancer

Fractal Measures of Drainage Network to Investigate Surface Deformation from Remote Sensing Data: A Paradigm from Hindukush (NE-Afghanistan)

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

Journal of Mountain Science 2011年第5期8卷 641-654页

作者： Syed amer MAHMOOD Richard GLOAGUEN Remote Sensing Group Institute of Geology Freiberg University of Mining and Technology Department of Space Science University of the Punjab

This approach represents the relative susceptibility of the topography of the earth to active deformation by means of geometrical distinctiveness of the river networks. This investigation employs the fractal analysis of drainage system extracted from ASTER Global Digital Elevation Model (GDEM-30m resolution). The objective is to mark active structures and to pinpoint the areas robustly influenced by neotectonics. This approach was examined in the Hindukush, NE-Afghanistan. This region is frequently affected by deadly earthquakes and the modern fault activities and deformation are driven by the collision between the northward-moving Indian subcontinent and Eurasia. This attempt is based on the fact that drainage system is strained to linearize due to neotectonic deformation. Hence, the low fractal dimensions of the Kabul, Panjsher, Laghman, Andarab, alingar and Kocha Rivers are credited to active tectonics. A comprehensive textural examination is conducted to probe the linearization, heterogeneity and connectivity of the drainage patterns. The aspects for these natural textures are computed by using the fractal dimension (FD), lacunarity (LA) and succolarity (SA) approach. All these methods are naturally interrelated, i.e. objects with similar FD can be further differentiated with LA and/or SA analysis. The maps of FD, LA and SA values are generated by using a sliding window of 50 arc seconds by 50 arc seconds (50" × 50"). Afterwards, the maps are interpreted in terms of regional susceptibility to neotectonics. This method is useful to pinpoint numerous zones where the drainage system is highly controlled by Hindukush active structures. In the North-Northeast of the Kabul block, we recognized active tectonic blocks. The region comprising, Kabul, Panjsher, Andrab, alingar and Badakhshan is more susceptible to damaging events. This investigation concludes that the fractal analysis of the river networks is a bonus tool to localize areas vulnerable to deadly incidents in

关键词： Fractal Drainage network Lacunarity Succolarity Surface deformation and Hindukush

Optimal Fusion-Based Handcrafted with Deep Features for Brain Cancer Classification

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

Computers, Materials & Continua 2022年第10期73卷 801-815页

作者： Mahmoud Ragab Sultanah M.Alshammari amer H.Asseri Waleed K.Almutiry Information Technology Department Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah21589Saudi Arabia Center for Artificial Intelligence in Precision Medicines King Abdulaziz UniversityJeddah21589Saudi Arabia Mathematics Department Faculty of ScienceAl-Azhar UniversityNaser City11884CairoEgypt Computer Science Department Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah21589Saudi Arabia Biochemistry Department Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Mathematics College of Science and Arts in Ar RassQassim UniversityBuryadah52571Saudi Arabia

Brain cancer detection and classification is done utilizing distinct medical imaging modalities like computed tomography(CT),or magnetic resonance imaging(MRI).An automated brain cancer classification using computer aided diagnosis(CAD)models can be designed to assist *** the recent advancement in computer vision(CV)and deep learning(DL)models,it is possible to automatically detect the tumor from images using a computer-aided *** study focuses on the design of automated Henry Gas Solubility Optimization with Fusion of Handcrafted and Deep Features(HGSO-FHDF)technique for brain cancer *** proposed HGSO-FHDF technique aims for detecting and classifying different stages of brain *** proposed HGSO-FHDF technique involves Gabor filtering(GF)technique for removing the noise and enhancing the quality of MRI *** addition,Tsallis entropy based image segmentation approach is applied to determine injured brain regions in the MRI ***,a fusion of handcrafted with deep features using Residual Network(ResNet)is utilized as feature ***,HGSO algorithm with kernel extreme learning machine(KELM)model was utilized for identifying the presence of brain *** examining the enhanced brain tumor classification performance,a comprehensive set of simulations take place on the BRATS 2015 dataset.

关键词： Brain cancer medical imaging deep learning fusion model metaheuristics feature extraction handcrafted features

Atmospheric Convection Model Based Digital Confidentiality Scheme

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6期71卷 4503-4522页

作者： Noor Munir Majid Khan Mohammad Mazyad Hazzazi amer Aljaedi Sajjad Shaukat Jamal Iqtadar Hussain Department of Applied Mathematics and Statistics Institute of Space TechnologyIslamabadPakistan Department of Mathematics College of ScienceKing Khalid UniversityAbha61413Saudi Arabia College of Computing and Information Technology University of TabukTabuk71491Saudi Arabia Department of Mathematics Statistics and PhysicsQatar UniversityDoha2713Qatar

Nonlinear dynamics is a fascinating area that is intensely affecting a wide range of different disciplines of science and technology *** combination of different innovative topics of information security and high-speed computing has added new visions into the behavior of complex nonlinear dynamical systems which uncovered amazing results even in the least difficult *** generation of complex actions froma very simple dynamical method has a strong relation with information *** protection of digital content is one of the inescapable concerns of the digitally advanced ***,information plays an important role in everyday life and affects the surroundings *** digital contents consist of text,images,audio,and videos,*** to the vast usage of digital images in the number of social and web applications,its security is one of the biggest *** this work,we have offered an innovative image encryption technique based on present criteria of confusion and *** designed scheme comprises two major nonlinear dynamical *** have employed discrete fractional chaotic iterative maps to add confusion capability in our suggested algorithm and continuous chaotic Lorenz *** have verified our offered scheme by using statistical *** investigations under the statistical tests suggested that our proposed technique is quite reasonable for the security of digital data.

关键词： Lorenz atmospheric convection model fractional logistic map image encryption S-box

Optimal Deep Transfer Learning Based Colorectal Cancer Detection and Classification Model

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 2023年第2期74卷 3279-3295页

作者： Mahmoud Ragab Maged Mostafa Mahmoud amer H.Asseri Hani Choudhry Haitham A.Yacoub Information Technology Department Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah21589Saudi Arabia Center for Artificial Intelligence in Precision Medicines King Abdulaziz UniversityJeddah21589Saudi Arabia Department of Mathematics Faculty of ScienceAl-Azhar UniversityNaser City11884CairoEgypt Cancer Biology Unit King Fahd Medical Research CenterKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Medical Laboratory Sciences Faculty of Applied Medical SciencesKing Abdulaziz UniversityJeddah22252Saudi Arabia Department of Molecular Genetics and Enzymology Human Genetics and Genome Research InstituteNational Research CentreCairo12622Egypt Biochemistry Department Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia Cell Biology Department Biotechnology Research InstituteNational Research CentreGiza12622Egypt

Colorectal carcinoma(CRC)is one such dispersed cancer globally and also prominent one in causing cancer-based ***,pathologists execute CRC diagnosis through visible scrutinizing under the microscope the resected tissue samples,stained and fixed through Haematoxylin and Eosin(H&E).The advancement of graphical processing systems has resulted in high potentiality for deep learning(DL)techniques in interpretating visual anatomy from high resolution medical *** study develops a slime mould algorithm with deep transfer learning enabled colorectal cancer detection and classification(SMADTL-CCDC)*** presented SMADTL-CCDC technique intends to appropriately recognize the occurrence of colorectal *** accomplish this,the SMADTLCCDC model initially undergoes pre-processing to improve the input image *** addition,a dense-EfficientNet technique was employed to extract feature vectors from the pre-processed ***,SMA with Discrete Hopfield neural network(DHNN)method was applied for the recognition and classification of colorectal *** utilization of SMA assists in appropriately selecting the parameters involved in the DHNN approach.A wide range of experiments was implemented on benchmark datasets to assess the classification performance.A comprehensive comparative study highlighted the better performance of the SMADTL-CDC model over the recent approaches.

关键词： Colorectal cancer deep transfer learning slime mould algorithm hyperparameter optimization biomedical imaging

Position and Velocity Time Delay for Suppression Vibrations of a Hybrid Rayleigh-Van der Pol-Duffing Oscillator

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sound & Vibration 2020年第3期54卷 149-161页

作者： Y.A.amer A.T.El-Sayed M.N.Abd El-Salam Mathematics Department Science FacultyZagazig UniversityZagazigEgypt Basic Sciences Department Modern Academy for Engineering and TechnologyCairoEgypt Basic Sciences Department Higher Technological Institute10th of Ramadan CityEgypt

In this paper,we used time delay feedback to minimize the vibrations of a hybrid Rayleigh–van der Pol–Duffing *** system is a one-degree-offreedom containing the cubic and fifth nonlinear terms and an external *** applied the multiple scales method to get the solution from first *** and numerically,we studied the system before and after adding time delay feedback at the primary resonance case(ffi!).We used MATLAB program to simulate the efficacy of different parameters and the time delay on the main system.

关键词： Position time delay feedback velocity time delay feedback multiple scales method resonance cases