检索结果-南通市图书馆

Cryptographic Based Secure Model on Dataset for Deep Learning Algorithms

Computers, Materials & Continua 2021年第10期69卷 1183-1200页

作者： muhammad tayyab Mohsen Marjani N.Z.Jhanjhi Ibrahim Abaker Targio Hashim Abdulwahab Ali Almazroi Abdulaleem Ali Almazroi School of Computer Science and Engineering(SCE) Taylor’s University Lake-Side CampusSubang Jaya47500Malaysia Department of Computer Science College of Computing and InformaticsUniversity of SharjahSharjah27272UAE University of Jeddah College of Computing and Information Technology at KhulaisDepartment of Information TechnologyJeddahSaudi Arabia Department of Computer Science Rafha Community CollegeNorthern Border UniversityArar91431Saudi Arabia

Deep learning(DL)algorithms have been widely used in various security applications to enhance the performances of decision-based *** data added by an attacker can cause several security and privacy problems in the operation of DL *** two most common active attacks are poisoning and evasion attacks,which can cause various problems,including wrong prediction and misclassification of decision-based ***,to design an efficient DL model,it is crucial to mitigate these *** this regard,this study proposes a secure neural network(NN)model that provides data security during model training and testing *** main idea is to use cryptographic functions,such as hash function(SHA512)and homomorphic encryption(HE)scheme,to provide authenticity,integrity,and confidentiality of *** performance of the proposed model is evaluated by experiments based on accuracy,precision,attack detection rate(ADR),and computational *** results show that the proposed model has achieved an accuracy of 98%,a precision of 0.97,and an ADR of 98%,even for a large number of ***,the proposed model can be used to detect attacks and mitigate the attacker *** results also show that the computational cost of the proposed model does not increase with model complexity.

关键词： Deep learning(DL) poisoning attacks evasion attacks neural network hash functions SHA512 homomorphic encryption scheme

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

COVID-19 Public Sentiment Insights: A Text Mining Approach to the Gulf Countries

引用

Computers, Materials & Continua 2021年第5期67卷 1613-1627页

作者： Saleh Albahli Ahmad Algsham Shamsulhaq Aeraj Muath Alsaeed Muath Alrashed Hafiz tayyab Rauf muhammad Arif Mazin Abed Mohammed Department of Information Technology College of ComputerQassim UniversityBuraydahSaudi Arabia Department of Computer Science Univesity of GurjatPakistan School of Computer Science Guanzghou UniversityGuangzhou510006China College of Computer Science and Information technology University of Anbar11RamadiAnbarIraq

Social media has been the primary source of information from mainstream news agencies due to the large number of users posting their *** COVID-19 outbreak did not only bring a virus with it but it also brought fear and uncertainty along with inaccurate and misinformation spread on social media *** phenomenon caused a state of panic among *** studies were conducted to stop the spread of fake news to help people cope with the *** this paper,a semantic analysis of three levels(negative,neutral,and positive)is used to gauge the feelings of Gulf countries towards the pandemic and the lockdown,on basis of a Twitter dataset of 2 months,using Natural Language Processing(NLP)*** has been observed that there are no mixed emotions during the pandemic as it started with a neutral reaction,then positive sentiments,and lastly,peaks of negative *** results show that the feelings of the Gulf countries towards the pandemic depict approximately a 50.5%neutral,a 31.2%positive,and an 18.3%negative sentiment *** study can be useful for government authorities to learn the discrepancies between different populations from diverse areas to overcome the COVID-19 spread accordingly.

关键词： COVID-19 sentiment analysis natural language processing twitter social data mining sentiment polarity

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

Context Based Adoption of Ranking and Indexing Measures for Cricket Team Ranks

引用

Computers, Materials & Continua 2020年第11期65卷 1113-1136页

作者： Raja Sher Afgun usmani Syed muhammad Saqlain Shah muhammad Sher Ramzan Abdullah Saad A.L-Malaise AL-Ghamdi Anwar Ghani Imran Khan Farrukh Saleem Department of CS&SE International Islamic UniversityH-10 SectorIslamabad44000Pakistan Department of Information System Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah21589Saudi Arabia

There is an international cricket governing body that ranks the expertise of all the cricket playing nations,known as the International Cricket Council(ICC).The ranking system followed by the ICC relies on the winnings and defeats of the *** model used by the ICC to implement rankings is deficient in certain key *** ignores key factors like winning margin and strength of the *** measures of the ranking concept are presented in this *** proposed methods adopt the concepts of h-Index and PageRank for presenting more comprehensive ranking *** proposed approaches not only rank the teams on their losing/winning stats but also take into consideration the margin of winning and the quality of the *** cricket team ranking techniques are presented i.e.,(1)Cricket Team-Index(ct-index),(2)Cricket Team Rank(CTR)and(3)Weighted Cricket Team Rank(WCTR).The proposed metrics are validated through the collection of cricket dataset,extracted from Cricinfo,having instances for all the three formats of the game i.e.,T20 International(T20i),One Day International(ODI)and Test *** comparative analysis between the proposed and existing techniques,for all the three formats,is presented as well.

关键词： Indexing ranking cricket teams runs and wickets

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

Design and Fabrication of Aluminum Cladding and Curtain Wall of a Sports Club

引用

Open Journal of Civil Engineering 2019年第1期9卷 1-17页

作者： muhammad tayyab Naqash Department of Civil Engineering Faculty of Engineering Islamic University of Madinah Medina KSA

The paper discusses the design, fabrication and the execution of the cladding supported by steel trusses and curtain wall of a sports club. The cladding and the curtain walls were subjected to a wind load of 1.2 Kpa considering basic wind speed of 25 m/s as per the project specifications. The first part of the paper deals with the cladding work of the canopy that consist of a 4 mm thick aluminium composite panels supported by steel trusses extended from the main structure. Two types of steel trusses were provided, the main truss connected to the space truss, whereas the intermediate truss connected to channels. Both trusses were spaced at 2.5 m centre to centre. These trusses were fabricated at factory and transported to the site for installation. The second part of the paper is related to the curtain wall design having Maximum Mullion spacing of 2 m, considered as worst scenario for the design calculations. The maximum Mullion height was 5.55 m, adopted in the calculations with bottom and top pinned connection. The Technal system was adopted for the design of mullions and transoms. Design was carried out using numerical modeling with CSI SAP2000 for cladding and its supporting structures. The bracket was realized and checked for the corresponding induced forces. All the structural systems were found safe according to different acceptance criterion.

关键词： Aluminum Composite Panel Curtain Wall Fabrication Numerical Modeling Cladding

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

Effects of drug-polymer dispersions on solubility and in vitro diffusion of artemisinin across a polydimethylsiloxane membrane

引用

Chinese Science Bulletin 2012年第14期57卷 1685-1692页

作者： SHAHZAD Yasser SHAH Syed Nisar Hussain ANSARI muhammad tayyab RIAZ Romana SAFDAR Aasma HUSSAIN Talib MALIK Madeeha Faculty of Pharmacy Bahauddin Zakariya University Division of Pharmacy and Pharmaceutical Sciences School of Applied SciencesUniversity of Huddersfield Hamdard Institute of Pharmaceutical Sciences Hamdard University

Artemisinin(ART) is a sesquiterpene lactone with an endo-peroxide bridge that is thought to be responsible for its antimalarial *** has low oral bioavailability because of aqueous insolubility,which leads to local toxicity at the site of *** present work focused on increasing its solubility and evaluating its permeation across a model membrane to mimic transdermal delivery that bypasses the hepatic *** this purpose,physical mixtures(PM),solid dispersions(SD) and lyophilized dispersions(LD) with different drug-polymer ratios(1:0.5,1:1,1:2,1:4 and 1:9) were prepared using the hydrophilic polymer polyvinylpyrrolidone(PVP).Drug-polymer dispersions were characterized using X-ray diffraction(XRD) and Fourier transform infrared spectroscopy(FTIR).Solubility was measured in three solvents:de-ionized water,phosphate buffered saline(PBS) and *** toluene-water partition coefficient was evaluated and compared with the literature and calculated logP *** vitro diffusion of ART was studied across a polydimethylsiloxane membrane from a saturated solution of drug-polymer *** patterns showed a gradual decrease in crystallinity of ART with increasing polymer concentration,while FTIR confirmed no interactions between ART and *** was increased up to 4-,5-and 8-fold for LD in water,PBS and methanol,*** logP for toluene-water was 2.65 ± 0.3,which is in good agreement with literature and calculated logP *** was enhanced,which is attributed to the decrease in crystallinity and increase in wettability of the *** ART flux was significantly higher than that of pure ART(0.12 ± 0.01) with increasing PVP concentration for SD and LD *** conclusion,drug-polymer dispersions with PVP improve the pharmaceutical properties of ART in the order LD>SD>PM.

关键词：聚合物分散体溶解度测定聚硅氧烷外扩散青蒿素药物傅里叶变换红外光谱水性高分子

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

Facile synthesis of ironenickelecobalt ternary oxide(FNCO)mesoporous nanowires as electrode material for supercapacitor application

引用

Journal of Materiomics 2022年第1期8卷 221-228页

作者： muhammad Usman muhammad tayyab Ahsan Sofia Javed Zeeshan Ali Yiqiang Zhan Irfan Ahmed Sajid Butt Mohammad Islam Asif Mahmood M.Aftab Akram School of Chemical and Materials Engineering National University of Sciences and Technology(NUST)Sector H-12Islamabad44000Pakistan Department of Materials Science and Engineering College of EngineeringPeking University100871BeijingChina State Key Laboratory of ASIC and System Center of Micro-Nano SystemSISTFudan UniversityShanghai200433China Department of Materials Science and Engineering Institute of Space TechnologyIslamabad44000Pakistan New Mexcico Institute of Mining&Technology SocorroNM 87801USA School of Chemical and Biomolecular Engineering The University of Sydney2006SydneyAustralia

Transition Metal Oxides have drawn significant attention due to their reversible chemical redox reaction and long-life *** agglomeration and shrinkage/expansion of transition metal oxides in the nanosize regime have a noticeable effect on their electrochemical *** in this work,mesoporous nanowires(NWs)with a typical composition of iron-nickel-cobalt ternary oxide(FNCO)are synthesized using a simple,facile and cost-effective hydrothermal process followed by furnace *** NWs are then extensively investigated as an electrode material for supercapacitor *** compare the electrochemical properties,nanowires of nickel-cobalt oxide(NCO),iron-cobalt oxide(FCO)and cobalt oxide(CO)were also produced by following the same *** FNCO NWs are found to overcome the shortcomings in the electrochemical energy storage devices by exhibiting higher values of specific capacitance(2197 Fg^(-1))and energy density(109 Whkg^(-1))at 1 Ag^(-1) current ***,the FNCO NWs also showed a cyclic charge/discharge stability of 96%even up to 20,000 ***,a FNCO//graphene asymmetric device,fabricated with FNCO NWs and graphene as positive and negative electrodes,respectively,which exhibit high energy density(47 Whkg^(-1)),power density(375 Wkg^(-1))and excellent capacitance retention(86%)after 15,000 cycles.

关键词： Electrochemistry Hydrothermal synthesis Nanowires Supercapacitor Transition metal oxides

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

GIS-based Urban Flood Resilience Assessment in City District,Peshawar,Khyber Pakhtunkhwa,Pakistan

GIS-based Urban Flood Resilience Assessment in City District...

引用

作者：坦亚（tayyab muhammad）东北师范大学

学位级别：硕士

城市洪水在全球范围内,尤其在南亚地区,一直是一个令人担忧的问题。巴基斯坦也不例外。在巴基斯坦,城市洪灾以及灾害带来的损失频繁发生。快速的城市化是导致城市洪灾一个重要关键因素,而这一因素没有得到应有的考虑。本研究旨在评估白...

城市洪水在全球范围内,尤其在南亚地区,一直是一个令人担忧的问题。巴基斯坦也不例外。在巴基斯坦,城市洪灾以及灾害带来的损失频繁发生。快速的城市化是导致城市洪灾一个重要关键因素,而这一因素没有得到应有的考虑。本研究旨在评估白沙瓦城市抗洪能力,同时确定其洪灾敏感性和洪灾应对能力,同时开启对(巴基斯坦)城市抗洪能力研究,为巴基斯坦范围内其他研究提供有益的参考。为实现这一目标,本文提出了一种基于地理信息系统(GIS)、遥感(RS)和层次分析法(AHP)的城市洪水恢复力模型(UFResi M)。该模型将城市洪涝灾害、暴露、敏感度和应对能力四个主要因素纳入敏感度和应对能力两部分。第一部分由I,I,I三个因素组成,共同反映洪灾敏感性;第二部分代表洪灾应对能力(I)。研究通过层次分析法对四个指标进行加权,得到了各指标的最终价值。本研究所使用模型的可靠度也采用受试者工作特性(ROC)曲线法进行了测定,得到的曲线下面积与城市抗洪能力评价结果的准确率为90.4%,表明模型具有很高的可靠性,可用于城市抗洪能力评价。研究结果表明,由于人口快速增长、城市化进程加快、环境恶化、缺乏先进的预警机制、公众意识不强、缺乏洪水风险评估等原因,研究区域极易受到城市洪水的影响。研究区域东北侧发生城市洪水的可能性较高,而西南部发生城市洪水的可能性较低。此外,研究区域的西部、西北部和西南部相较于北部,暴露于城市洪水的风险更低。在敏感性方面,研究区域的北部、东北部和中部比南部和西南部更容易受到城市洪水的影响。有趣的是,商业和住宅建筑数量最多低洼地区,正是年降水量高,因而更容易受到城市洪水影响的地区。此外,政府的观测设施条件较差,也增加了城市洪水对的敏感性。对洪灾应对能力的分析表明,西部和中部地区对城市洪涝灾害分别表现出中等和较高的应对能力,不易受到影响。而研究区域的东南和西北侧对城市洪水的应对能力很低。整体而言,整个研究区西部地区对城市洪水的抗御能力较强,而东部地区对城市洪水的抗御能力较弱,敏感性较高,抗御能力较低。这项研究提供了白沙瓦市城市抗洪能力的综合评估,但仍然鼓励更多依托如高分辨率卫星图像和人工神经网络(ANN)等高新技术的研究,为提高本研究所提出模型效率、准确度以及模型输出可靠性进行补充。本研究的综合评估的结果有助于跟踪社区绩效,并为决策者提供可用工具,以更好地将抗灾能力方面纳入城市洪水管理、城市发展和城市规划。

关键词：

来源：

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

Highly Active Interfacial Sites in SFT-SnO_(2) Heterojunction Electrolyte for Enhanced Fuel Cell Performance via Engineered Energy Bands:Envisioned Theoretically and Experimentally

引用

Energy & Environmental Materials 2024年第3期7卷 384-397页

作者： Sajid Rauf muhammad Bilal Hanif Faiz Wali Zuhra tayyab Bin Zhu Naveed Mushtaq Yatao Yang Kashif Khan Peter D.Lund Martin Motola Wei Xu College of Electronic and Information Engineering and State Key Laboratory of Radio frequency Heterogeneous Integration Shenzhen UniversityShenzhen 518000China Department of Inorganic Chemistry Faculty of Natural SciencesComenius University in BratislavaIlkovicova 684215BratislavaSlovakia College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China School of Energy and Environment Southeast UniversityNo.2 Si Pai LouNanjing 210096China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China New Energy Technologies Group Department of Applied PhysicsAalto University School of ScienceP.O.Box 15100Fl-00076AaltoEspoo Finland

Extending the ionic conductivity is the pre-requisite of electrolytes in fuel cell technology for high-electrochemical *** this regard,the introduction of semiconductor-oxide materials and the approach of heterostructure formation by modulating energy bands to enhance ionic conduction acting as an electrolyte in fuel ***(n-type;SnO_(2))plays a key role by introducing into p-type SrFe_(0.2)Ti_(0.8)O_(3-δ)(SFT)semiconductor perovskite materials to construct p-n heterojunction for high ionic ***,two different composites of SFT and SnO_(2)are constructed by gluing p-and n-type SFT-SnO_(2),where the optimal composition of SFT-SnO_(2)(6∶4)heterostructure electrolyte-based fuel cell achieved excellent ionic conductivity 0.24 S cm^(-1)with power-output of 1004 mW cm^(-2)and high OCV 1.12 V at a low operational temperature of 500℃.The high power-output and significant ionic conductivity with durable operation of 54 h are accredited to SFT-SnO_(2)heterojunction formation including interfacial conduction assisted by a built-in electric field in fuel cell ***,the fuel conversion efficiency and considerable Faradaic efficiency reveal the compatibility of SFT-SnO_(2)heterostructure electrolyte and ruled-out short-circuiting ***,the first principle calculation provides sufficient information on structure optimization and energy-band structure modulation of SFT-SnO_(2).This strategy will provide new insight into semiconductor-based fuel cell technology to design novel electrolytes.

关键词： high ionic conductivity interfacial conduction modulated energy band structure p-n heterojunction semiconductors

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

Codal Requirements Using Capacity Design Philosophy, and Their Applications in the Design of Steel Structures in Seismic Zones

引用

Open Journal of Earthquake Research 2018年第2期7卷 88-107页

作者： muhammad tayyab Naqash Ayed Alluqmani Department of Civil Engineering Islamic University in Madinah Madina Almunaworah KSA

The use of steel structures in the developing countries is limited in spite of its better performance in the case of seismic events due to its high ductility. Although steel structures behave well under seismic excitation, nevertheless the use of structural steel is limiting these days. This paper aims to address various parameters related to the capacity design approach involved in the seismic design of conventional steel structures. Few cases of the early steel structures construction such as bridges in Pakistan are briefly described. Philosophies based on the capacity design approach and the importance of conventional steel lateral load resisting systems with their global mechanisms are provided. The design procedures of Eurocode 8 for Steel Moment resisting frames, Concentric cross braced frames and Eccentric braced frames are given and illustrated. It is believed that the paper will contribute and will be helpful for the designers, researchers and academicians involve in the study of lateral load resisting systems for incorporating in the design process. Since synopsis tables are provided, therefore this will allow a clear understanding of the capacity design approach for different lateral load resisting systems.

关键词： Moment Resisting Frames Concentric Cross Braced Frames Eccentric Braced Frames Behaviour Factor Eurocode 8 Seismic Code in Pakistan

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

溶解氧浓度对CuCrZr合金腐蚀行为的影响

溶解氧浓度对CuCrZr合金腐蚀行为的影响

引用

作者： muhammad tayyab 华北电力大学(北京)

学位级别：硕士

当今的电力能源挑战指的是在安全并低成本的要求下,尽可能长时间的运行电厂。腐蚀是决定所有电厂运行寿命的主要因素之一。而在ITER(国际热核实验反应堆)的设计中,暴露在高流速的冷却水环境下铜铬锆合金(CuCrZr)的腐蚀是影响电厂运行的... 详细信息

当今的电力能源挑战指的是在安全并低成本的要求下,尽可能长时间的运行电厂。腐蚀是决定所有电厂运行寿命的主要因素之一。而在ITER(国际热核实验反应堆)的设计中,暴露在高流速的冷却水环境下铜铬锆合金(CuCrZr)的腐蚀是影响电厂运行的一项重要因素。在ITER的结构、活化腐蚀产物的形成以及冷却剂水因素下,对CuCrZr合金的耐蚀性评估将至关重要。文献表明,pH、溶解氧、电阻率、腐蚀电位和温度等各种因素都会影响铜及其合金在水中的腐蚀速率。目前已经对铜的腐蚀进行了大量的工作,但是关于溶解氧对铜合金腐蚀的影响的工作非常有限,因此本文将探索溶解氧对铜合金腐蚀的影响。论文在连续高温高压腐蚀试验台上对CuCrZr合金进行了腐蚀实验。该实验在三种不同的含氧量下进行,分别为10ppb,250ppb和1500ppb。在实验过程中,冷却水温度为150℃,流速在1ml/min。通过失重分析法,确定腐蚀速率。通过SEM,EDS,XPS等仪器观察腐蚀产物的微观结构和化学组成。并基于CuCrZr合金在冷却水中的腐蚀过程,讨论了溶解氧浓度对CuCrZr合金腐蚀的影响。结果表明,在1Oppb,250ppb和1500ppb的溶解氧浓度下,腐蚀失重遵循m=0.048t0.366,m=0.085t0.386 和 m=0.041t0.458 的规律。在试样上形成由 CuO 和Cu2O组成的氧化层,随着时间的推移氧化层越来越致密。随着腐蚀时间的增加,腐蚀层逐渐增加。到1500h时,三种溶解氧浓度下腐蚀层厚度分别为0.75μm,2.1μ m 和 2.3 μ m。论文中讨论了腐蚀的重要性及其对工业的影响,介绍了 ITER的历史背景,并解释了聚变反应堆的必要性。本文还解释了当前ITER的问题和未来的范围。它还阐明了研究溶解氧浓度对CuCrZr合金腐蚀行为影响的必要性,因为腐蚀高度依赖于氧浓度。它还强调了其他研究人员已就相关主题开展的工作。

关键词：溶解氧浓度聚变反应堆冷却水 CuCrZr合金腐蚀腐蚀速率 ITER

来源：

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

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：