检索结果-南通市图书馆

维普期刊数据库

Ballistic design and testing of a composite armour reinforced by CNTs suitable for armoured vehicles

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第2期32卷 173-195页

作者： Evangelos Ch.Tsirogiannis Evangelos Daskalakis mohamed H.Hassan abdalla m.Omar Paulo Bartolo EODH SA Research and Development DepartmentLakkoma Chalkidikis63080Greece School of mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchesterM139PLUK Singapore Centre for 3D Printing School of Mechanical and Aerospace EngineeringNanyang Technological University639798Singapore

This paper is investigating the use of composite armour reinforced by nanomaterials, for the protection of light armoured(LAV) and medium armoured military vehicles(mAV), and the interaction between the composite materials and high-performance ballistic projectiles. Four armour materials, consisted of front hybrid fibre reinforced polymer cover layer, ceramic strike-face, fibre reinforced polymer intermediate layer and the metal matrix composite reinforced backplate, were manufactured and assembled by adhesive technology. The proposed laminated protection system is suitable for armoured ground vehicles;however, it could be used as armour on ground, air and naval platforms. The design of the protection system, including material selection and thickness, was elaborated depending on the performance requirements of Level 4 + STANAG 4569 military standard(projectile 14.5 mm × 114 mm API B32) and especially on a design philosophy which is analysed with the specifications. The backplate of this new composite is a hybrid material of metal matrix Composite(mmC) reinforced with carbon nanotubes(CNTs), manufactured with the use of powder metallurgy technique. The composite backplate material was morphologically, mechanically and chemically analysed. Results show that all plates are presenting high mechanical properties and ballistic characteristics, compared to commonly used armour plates. Real military ballistic tests according to AEP-STANAG 4569 were carried out for the total composite armour systems. After the ballistic tests, AA2024-CNT3 showed the best protection results, compared with the other plates(AA2024-CNT1 and AA2024-CNT2), with the projectile being unable to fully penetrate the composite plate.

关键词： Passive armour protection Protective armour Ballistic performance Hybrid composites Vehicle protection

维普期刊数据库

Structure-based discovery of *** phytochemicals as potential inhibitors against monkeypox(mpox)viral protein

在线全文

学校读者我要写书评

暂无评论

Journal of Biosafety and Biosecurity

Journal of Biosafety and Biosecurity 2024年第3期6卷 157-169页

作者： Ranjan K.mohapatra Ahmed mahal Pranab K.mohapatra Ashish K.Sarangi Snehasish mishra meshari A.Alsuwat Nada N.Alshehri Sozan m.Abdelkhalig mohammed Garout mohammed Aljeldah Ahmad A.Alshehri Ahmed Saif mohammed Abdulrahman Alshahrani Ali S.Alqahtani Yahya A.Almutawif Hamza m.A.Eid Faisal m Albaqami mohnad abdalla Ali A.Rabaan Department of Chemistry Government College of EngineeringKeonjhar 758002OdishaIndia Department of medical Biochemical Analysis College of Health TechnologyCihan University–ErbilErbilKurdistan RegionIraq Department of Chemistry CV Raman Global UniversityBhubaneswarOdishaIndia Department of Chemistry School of Applied SciencesCenturion University of Technology and ManagementBalangirOdishaIndia School of Biotechnology Campus-11KIIT Deemed-to-be-UniversityBhubaneswar 751024OdishaIndia Clinical Laboratory Sciences Department College of Applied Medical SciencesTaif UniversityAl-Taif 21974Saudi Arabia Internal medicine Department King Khalid University Medical CityCollege of MedicineAbha 61481Saudi Arabia Department of Basic medical Sciences College of MedicineAlMaarefa UniversityRiyadhSaudi Arabia Department of Community medicine and Health Care for Pilgrims Faculty of MedicineUmm Al-Qura UniversityMakkah 21955Saudi Arabia Department of Clinical Laboratory Sciences College of Applied Medical SciencesUniversity of Hafr Al BatinHafr Al Batin 39831Saudi Arabia Department of Clinical Laboratory Sciences Faculty of Applied Medical SciencesNajran UniversityNajran 61441Saudi Arabia Department of medical Laboratory Sciences Faculty of Applied Medical SciencesKing Khalid UniversityAbha 61481Saudi Arabia mDepartment of medical Laboratories Technology College of Applied Medical SciencesTaibah UniversityMadinah 41411Saudi Arabia Biology Department College of ScienceIslamic University of MadinahMadinah 42351Saudi Arabia Pediatric Research Institute Children’s Hospital Affiliated to Shandong UniversityJinanShandong 250022China molecular Diagnostic Laboratory Johns Hopkins Aramco HealthcareDhahran 31311Saudi Arabia College of medicine Alfaisal UniversityRiyadh 11533Saudi Arabia Department of Public Health and Nutrition The University of HaripurHaripur 22610Pakistan

Outbreaks of monkeypox(mpox)in over 100 non-endemic countries in 2022 represented a serious global health *** a neglected disease,mpox has become a global public health issue.A42R profilinlike protein from mpox(PDB ID:4QWO)represents a potential new lead for drug development and may interact with various synthetic and natural *** this report,the interaction of A42R profilinlike protein with six phytochemicals found in the medicinal plant Ficus religiosa(abundant in India)was *** on the predicted and compared protein–ligand binding energies,biological properties,IC_(50) values and toxicity,two compounds,kaempferol(C-1)and piperine(C-4),were *** characteristics and quantitative structure–activity relationship(QSAR)of these two compounds were determined,and molecular dynamics(mD)simulations were *** silico examination of the kaempferol(C-1)and piperine(C-4)interactions with A42R profilin-like protein gave best-pose ligandbinding energies of–6.98 and–5.57 kcal/mol,*** predicted IC_(50) of C-1 was 7.63 lm and 82 lm for *** data indicated that kaempferol and piperine are non-mutagenic,and the QSAR data revealed that piperlongumine(5.92)and piperine(5.25)had higher log P values than the other compounds *** simulations of A42R profilin-like protein in complex with C-1 and C-4 were performed to examine the stability of the ligand–protein ***/C and C-4 showed the highest affinity and activities,they may be suitable lead candidates for developing mpox therapeutic *** study should facilitate discovering and synthesizing innovative therapeutics to address other infectious diseases.

关键词： monkeypox mpox Phytochemical molecular docking mD simulation ADmET QSAR

Sports Prediction model through Cloud Computing and Big Data Based on Artificial Intelligence method

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 Intelligent Learning Systems and Applications 2024年第2期16卷 53-79页

作者： Aws I. Abu Eid Achraf Ben miled Ahlem Fatnassi majid A. Nawaz Ashraf F. A. mahmoud Faroug A. abdalla Chams Jabnoun Aida Dhibi Firas m. Allan mohammed Ahmed Elhossiny Salem Belhaj Imen Ben mohamed Faculty of Computing Studies Arab Open University Amman Jordan Computer Science Department Science College Northern Border University Arar Kingdom of Saudi Arabia Artificial Intelligence and Data Engineering Laboratory LR21ES23 Faculty of Sciences of Bizerte University of Carthage Tunis Tunisia Applied College Northern Border University Arar Kingdom of Saudi Arabia Faculty of Specific Education Mansoura University Mansoura Egypt

This article delves into the intricate relationship between big data, cloud computing, and artificial intelligence, shedding light on their fundamental attributes and interdependence. It explores the seamless amalgamation of AI methodologies within cloud computing and big data analytics, encompassing the development of a cloud computing framework built on the robust foundation of the Hadoop platform, enriched by AI learning algorithms. Additionally, it examines the creation of a predictive model empowered by tailored artificial intelligence techniques. Rigorous simulations are conducted to extract valuable insights, facilitating method evaluation and performance assessment, all within the dynamic Hadoop environment, thereby reaffirming the precision of the proposed approach. The results and analysis section reveals compelling findings derived from comprehensive simulations within the Hadoop environment. These outcomes demonstrate the efficacy of the Sport AI model (SAIm) framework in enhancing the accuracy of sports-related outcome predictions. Through meticulous mathematical analyses and performance assessments, integrating AI with big data emerges as a powerful tool for optimizing decision-making in sports. The discussion section extends the implications of these results, highlighting the potential for SAIm to revolutionize sports forecasting, strategic planning, and performance optimization for players and coaches. The combination of big data, cloud computing, and AI offers a promising avenue for future advancements in sports analytics. This research underscores the synergy between these technologies and paves the way for innovative approaches to sports-related decision-making and performance enhancement.

关键词： Artificial Intelligence machine Learning Spark Apache Big Data SAIm

Spontaneous ejaculation after spinal cord trauma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2010年第4期12卷 609-610页

作者： Hossam A. Yasien abdalla m. Attia Department of Dermatology Andrology ＆ STDs Faculty of Medicine Menoufiya University Menoufiya 32511 Egypt

I am Dr Hossam A. Yasien, from the Department of Dermatology, Andrology ＆ STDs, Faculty of medicine, menoufiya University, menoufiya, Egypt. Spinal cord lesions in humans are associated with impaired ejaculation [1], suggesting that the effects of descending pathways on the spinal ejaculatory mechanism are predominantly excitatory. In rodents, however, there may be an additional and important descending inhibitory pathway [2]. We report a case of a patient in whom a spinal trauma was unusually associated with spontaneous ejaculation.

关键词： ejaculation spinal trauma

Gain and Emission Spectrum Characteristics of 465 nm Laser Diode Pumped Tm3+-Doped Telluride Glass Fibers

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 Shanghai Jiaotong university(Science) 2017年第4期22卷 402-405页

作者： abdalla Saadelnour 姜淳 State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong UniversityShanghai 200240China

Gain and emission spectrum characteristics of Tm3+-doped telluride glass fibers pumped with 465 nm lasers are analyzed. The rate and power propagation equation groups of the fibers are solved numerically and the effects of the fiber parameters including active ion concentration, length and pump power on the gain spectra and amplified spontaneous emission (ASE) spectra are analyzed. The results show that with a pump parameter of 465 nm/200mW, a doping concentration of 2.5×1025ion/m3and a fiber length of 16m, the gain and ASE spectra can cover from 1.100 to 1.900 μm, and the gain and ASE power peaks can reach 52 dB and 8mW, respectively. © 2017, Shanghai Jiaotong University and Springer-Verlag GmbH Germany.

关键词： gain thulium-doped tellurite glass fiber 465 nm pump laser

维普期刊数据库

Synthesis, Structural Characterization, and Antimicrobial Activities of mn（II）, Co（II）, Ni（II）, Cu（ll） and Zn（II） Complexes of Triazole-based Azodyes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2011年第6期29卷 1124-1132页

作者： Khedr, abdalla m. Gaber, mohamed Abd EI-Zaher, Eman H. Chemistry Department Faculty of Science Tanta University Tanta Egypt Botany Department Faculty of Science Tanta University Tanta Egypt

The synthesis and characterization of new transition metal complexes of mn（ll）, Co（II）, Ni（II）, Cu（II） and Zn（II） with 3-（2-hydroxynaph-l-ylazo）-1,2,4-triazole （HL1） and 3-（2-hydroxy-3-carboxynaph-l-ylazo）-1,2,4-triazole （HL2） have been carried out. Their structures were confirmed by elemental analyses, thermal analyses, spectral and magnetic data. The IR and 1H NmR spectra indicated that HL1 and HL2 coordinated to the metal ions as bidentate monobasic ligands via the hydroxyl O and azo N atoms. The UV-Vis, ESR spectra and magnetic moment data revealed the formation of octahedral complexes [mnL1（AcO）（H2O）3] （1）, [CoL1（AcO）（HzO）3]·H2O （2）, [mnL2- （AcO）（H20）3] （6） and [CoL2（AcO）（H2O）3] （7）, [NiL1（AcO）（H2O）] （3）,[ZnLI（AcO）（HzO）]·H2O （5）, [NiL2- （AcO）（H2O）] （8）, [ZnL2（AcO）（H2O）]·H2O （10） have tetrahedral geometry, whereas [CuLI（AcO）（H2O）2] （4） and [CuL2（AcO）（H2O）2]·5H2O （9） have square pyramidal geometry.. The mass spectra of the complexes under EI-con- ditions showed the highest peaks corresponding to their molecular weights, based on the atomic weights of 55mn, 59Co, 58Ni, 63Cu and 64Zn isotopes; besides, other peaks containing other isotopes distribution of the metal. Kinetic and thermodynamic parameters of the thermal decomposition stages were computed from the thermal data using Coats-Redfern method. HL2 and complexes 6--10 were found to have moderate antimicrobial activities against Staphylococcus＇ aureus （gram positive）, Escherichia coli （gram negative） and Salmonella sp bacteria, and antifungal activity against Fusarium oxysporum, Aspergillus niger and Candida albicans. Also, in most cases, metallation increased the activity compared with the free ligand.

关键词： analytical and inorganic chemistry triazole azodyes metal(II) chelates antimicrobial activities

ON LImITING DISTRIBUTION FOR TImE FAILURE OF DUPLEX STANDBY REDUNDANT SYSTEm WITH PREVENTIVE mAINTENANCE

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta mathematica Scientia 1983年第3期3卷 295-298页

作者： EI-Sharnduby,m A.Saddika,Ahmed abdalla King Abdulaziz University King Abdulaziz University King Abdulaziz University

We consider a standby redundant model of two units under Difficult maintenance policy. We shall prove that under the condition that the mean life time of the system is much larger than the mean repair time and the mai... 详细信息

关键词： time ON LImITING DISTRIBUTION FOR TImE FAILURE OF DUPLEX STANDBY REDUNDANT SYSTEm WITH PREVENTIVE mAINTENANCE

A Fault-Handling method for the Hamiltonian Cycle in the Hypercube Topology

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Computers, materials & Continua 2021年第7期68卷 505-519页

作者： Adnan A.Hnaif Abdelfatah A.Tamimi Ayman m.abdalla Iqbal Jebril Faculty of Science and Information Technology Al-Zaytoonah University of JordanAmman11733Jordan

many routing protocols,such as distance vector and link-state protocols are used for nding the best paths in a *** nd the path between the source and destination nodes where every node is visited once with no repeats,Hamiltonian and Hypercube routing protocols are often ***,these algorithms are not designed to solve the problem of a node failure,where one or more nodes become *** paper proposes an efcient modied Fault-free Hamiltonian Cycle based on the Hypercube Topology(FHCHT)to perform a connection between nodes when one or more nodes become *** can be applied in a different environment to transmit data with a high-reliability connection by nding an alternative path between the source and destination nodes when some nodes ***,a proposed Hamiltonian Near Cycle(HNC)scheme has been developed and *** implementation results indicated that FHCHT produces alternative cycles relatively similar to a Hamiltonian Cycle for the Hypercube,complete,and random *** implementation of the proposed algorithm in a Hypercube achieved a 31%and 76%reduction in cost compared to the complete and random graphs,respectively.

关键词： Hamiltonian cycle hypercube fault tolerance routing protocols WSN IoT

Four-Step Iteration Scheme to Approximate Fixed Point for Weak Contractions

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 2020年第9期64卷 1491-1504页

作者： Wasfi Shatanawi Anwar Bataihah abdalla Tallafha Department of mathematics and General Courses Prince Sultan UniversityRiyadh11586Saudi Arabia Department of medical Research China Medical University HospitalChina Medical UniversityTaichung40402Taiwan Department of m-Commerce and multimedia Applications Asia UniversityTaichung41354Taiwan Department of mathematics School of ScienceThe University of JordanAmman11942Jordan

Fixed point theory is one of the most important subjects in the setting of metric spaces since fixed point theorems can be used to determine the existence and the uniqueness of solutions of such mathematical *** is known that many problems in applied sciences and engineering can be formulated as functional *** equations can be transferred to fixed point theorems in an easy ***,we use the fixed point theory to prove the existence and uniqueness of solutions of such integral and differential *** X be a non-empty set.A fixed point for a self-mapping T on X is a point𝑒𝑒∈𝑋𝑋that satisfying T e=*** of the most challenging problems in mathematics is to construct some iterations to faster the calculation or approximation of the fixed point of such *** mathematicians constructed and generated some new iteration schemes to calculate or approximate the fixed point of such problems such as mann et al.[mann(1953);Ishikawa(1974);Sintunavarat and Pitea(2016);Berinde(2004b);Agarwal,O’Regan and Sahu(2007)].The main purpose of the present paper is to introduce and construct a new iteration scheme to calculate or approximate the fixed point within a fewer number of steps as much as we *** prove that our iteration scheme is faster than the iteration schemes given by Sintunavarat et al.[Sintunavarat and Pitea(2016);Agarwal,O’Regan and Sahu(2007);mann(1953);Ishikawa(1974)].We give some numerical examples by using mATLAB to compare the efficiency and effectiveness of our iterations scheme with the efficiency of mann et al.[mann(1953);Ishikawa(1974);Sintunavarat and Pitea(2016);Abbas and Nazir(2014);Agarwal,O’Regan and Sahu(2007)]***,we introduce a problem raised from Newton’s law of cooling as an application of our new iteration ***,we support our application with a numerical example and figures to illustrate the validity of our iterative scheme.

关键词： Weak contraction fixed point iteration scheme mean value theorem