检索结果-南通市图书馆

Intelligent System Application to Monitor the Smart City Building Lighting

Computers, Materials & Continua 2023年第5期75卷 3159-3169页

作者： Tzu-Chia Chen Ngakan Ketut Acwin Dwijendra Saurabh Singhal R.Sivaraman amr mamdouh Department of Industrial Engineering and Management Ming Chi University of TechnologyNew Taipei City24301Taiwan Department of Architecture Faculty of EngineeringUdayana UniversityBali80361Indonesia Department of Computer Engineering and Applications GLA UniversityMathuraUttar PradeshIndia Department of Mathematics Dwaraka Doss Goverdhan Doss Vaishnav CollegeArumbakkamUniversity of MadrasChennaiIndia Architectural Engineering Department Faculty of Engineering&TechnologyFuture University in EgyptNew Cairo11835Egyp

A smart city incorporates infrastructure methods that are environmentally responsible,such as smart communications,smart grids,smart energy,and smart *** city administration has prioritized the use of cutting-edge technology and informatics as the primary strategy for enhancing service quality,with energy resources taking *** achieve optimal energy management in themultidimensional system of a city tribe,it is necessary not only to identify and study the vast majority of energy elements,but also to define their implicit *** is because optimal energy management is required to reach this *** lighting index is an essential consideration when evaluating the comfort *** order to realize the concept of a smart city,the primary objective of this research is to create a system for managing and monitoring the lighting *** is possible to identify two distinct phaseswithin the intelligent *** data collection concludes,the monitoring system will be *** the second step,the operation of the control system is analyzed and its effect on the performance of the numerical model is *** evaluation is based on the proposed *** optimized resultswere deemed satisfactory because they maintained the brightness index value(79%)while consuming less *** intelligent implementation system generated satisfactory outcomes,which were observed 1.75 times on average.

关键词： Smart city lighting index residential building energy consumption

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

Safeguarding Cloud Computing Infrastructure:A Security Analysis

引用

Computer Systems Science & Engineering 2021年第5期37卷 159-167页

作者： mamdouh Alenezi College of Computer and Information Sciences Prince Sultan UniversityRiyadhKingdom of Saudi Arabia

Cloud computing is the provision of hosted resources,comprising software,hardware and processing over the World Wide *** advantages of rapid deployment,versatility,low expenses and scalability have led to the widespread use of cloud computing across organizations of all sizes,mostly as a component of the combination/multi-cloud infrastructure *** cloud storage offers significant benefits as well as cost-effective alternatives for IT management and expansion,new opportunities and challenges in the context of security vulnerabilities are emerging in this *** security,also recognized as cloud computing security,refers to a collection of policies,regulations,systematic processes that function together to secure cloud infrastructure *** security procedures are designed to safeguard cloud data,to facilitate regulatory enforcement and to preserve the confidentiality of consumers,as well as to lay down encryption rules for specific devices and *** study presents an overview of the innovative cloud computing and security challenges that exist at different levels of cloud *** this league,the present research work would be a significant contribution in reducing the security attacks on cloud computing so as to provide sustainable and secure services.

关键词： Cloud computing cloud security cloud security issues security attacks intrusion

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

Activation Energy of Nitriding Medium Carbon Ferromanganese Alloy

引用

Journal of Iron and Steel Research International 2013年第1期20卷 58-61,78页

作者： Saeed N Ghali mamdouh M Eissa Micheal L Mishreky Steel Technology Department Central Metallurgical Research and Development Institute (CMRDI)Helwan 11421CairoEgypt

Investigation of some kinetics aspects of the reaction between nitrogen and medium carbon ferromanganese （MC-FeMn） was made. Nitriding process of fine medium carbon ferromanganese was carried out at temperature ranging from 973 to 1 223 K and time up to 480 min. Nitriding was carried out under nitrogen and hydrogen gas pressures. At temperature of 573 K, hydrogen gas was injected with pressure of about 0.2 MPa followed by injection of nitrogen gas up to 1.2 MPa. Sample mass was 35 g, nitrided in cylindrical chamber with 34 mm in inner diameter and 1 200 mm in length. The change in nitrogen pressure was taken as an indication for nitrogen pickup. The mass gain i.e. nitrogen pickup in kilograms per surface area （m2） was determined by time at different temperatures. Nitriding rate constants were calculated and the activation energy of nitriding process was derived from Arrhenius equation. The nitriding rate constant was found to be increased by increasing temperature of the reaction. The activation energy of nitriding process of fine medium carbon ferromanganese at time ranging up to 28 800 s is around 140 kJ/mol. It was found that the rate controlling step of the nitriding process of MC-FeMn is diffusion mechanism.

关键词： nitriding ferromanganese gas solid reaction activation energy

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

Effect of cooling rate and composition on microstructure and mechanical properties of ultrahigh-strength steels

引用

Journal of Iron and Steel Research International 2019年第12期26卷 1350-1365页

作者： Mohammed Ali David Porter Jukka Komi mamdouh Eissa Hoda El Faramawy Taha Mattar Materials and Mechanical Engineering Centre for Advanced Steels ResearchUniversity of OuluOulu 90014Finland Steel Technology Department Central Metallurgical Research and Development InstituteHelwanCairo 11421Egypt

The influence of cooling rate on the microstructure and mechanical properties of two new ultrahigh-strength steels(UHSSs)with different levels of C,Cr and Ni has been evaluated for the as-cooled and untempered *** UHSS had higher contents of C and Cr,while the other one had a higher Ni *** the basis of dilatation curves,microstructures,macrohardness and microhardness,continuous cooling transformation diagrams were constructed as a guide to heat treatment *** rates(CRs)of 60,1 and 0.01°C/s were selected for more detailed *** characterization was made by laser scanning confocal microscopy,field emission scanning electron microscopy combined with electron backscatter diffraction,electron probe microanalysis and X-ray *** properties were characterized using macrohardness,tensile and Charpy V-notch impact *** with the higher C and Cr contents showed lower transformation temperatures and slower bainite formation kinetics than that with the higher Ni *** cooling rates led to lower volume fractions and carbon contents of retained austenite together with finer prior austenite grain size,as well as effective final grain size and lath *** changes were accompanied by higher yield and tensile *** best combinations of strength and toughness were obtained with martensitic microstructures and by avoiding the formation of granular bainite accompanied by proeutectoid carbides at low *** the cooling rates studied,UHSS with the higher C and Cr contents showed the higher hardness and strength but at the cost of toughness.

关键词： Ultrahigh-strength steel Electroslag remelting Continuous cooling transformation diagram Microstructure feature Mechanical property

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

Synthesis and Antimicrobial Activity of Some Condensed [4-（2,4,6-Trimethylphenyl）-1 （2H）-oxo-phthalazin-2-yl]acetic Acid Hydrazide

引用

Chinese Journal of Chemistry 2012年第3期30卷 616-626页

作者： EI-Hashash, MaherA EI-Kady, AhmedY Taha, mamdouh A El-Shamy, Ibrahim E Chemistry Department Faculty of Science Ain Shams University Cairo Egypt Chemistry Department Faculty of Science Fayoum University Fayoum Egypt

Some new 1,2,4-triazolo-, 1,3,4-oxadiazolo-, 1,3,4-thiadiazol-, and pyrazolo-2,4,6-trimethylphenyl-1（2H）-oxo- phthalazine derivatives were synthesized and identified by IR, ^1H NMR, ^13C NMR, MS and elemental analys... 详细信息

关键词： 1(2H)-oxo-phthalazine 1,2,4-triazole 1,3,4-oxadiazole 1,3,4-thiadiazole antimicrobial activity

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

Utilization of Machine Learning Methods in Modeling Specific Heat Capacity of Nanofluids

引用

Computers, Materials & Continua 2022年第1期70卷 361-374页

作者： mamdouh El Haj Assad Ibrahim Mahariq Raymond Ghandour Mohammad Alhuyi Nazari Thabet Abdeljawad Sustainable and Renewable Energy Engineering Department University of SharjahP.O.Box 27272SharjahUAE College of Engineering and Technology American University of theMiddle EastKuwait Faculty of New Sciences and Technologies University of TehranTehranIran Department of Mathematics and General Sciences Prince Sultan UniversityRiyadh11586Saudi Arabia Department of Medical Research China Medical UniversityTaichung40402Taiwan Department of Computer Science and Information Engineering Asia UniversityTaichungTaiwan

Nanofluids are extensively applied in various heat transfer mediums for improving their heat transfer characteristics and hence their *** heat capacity of nanofluids,as one of the thermophysical properties,performs principal role in heat transfer of thermal mediums utilizing *** this regard,different studies have been carried out to investigate the influential factors on nanofluids specific ***,several regression models based on correlations or artificial intelligence have been developed for forecasting this property of *** the current review paper,influential parameters on the specific heat capacity of nanofluids are ***,the proposed models for their forecasting and modeling are *** to the reviewed works,concentration and properties of solid structures in addition to temperature affect specific heat capacity to large extent and must be considered as inputs for the ***,by using other effective factors,the accuracy and comprehensive of the models can be ***,some suggestions are offered for the upcoming works in the relevant topics.

关键词： Specific heat capacity nanofluid artificial neural network concentration

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

Modeling CO_(2) Emission of Middle Eastern Countries Using Intelligent Methods

引用

Computers, Materials & Continua 2021年第12期69卷 3767-3781页

作者： mamdouh El Haj Assad Ibrahim Mahariq Zaher Al Barakeh Mahmoud Khasawneh Mohammad Ali Amooie Sustainable and Renewable Energy Engineering Department University of SharjahPO Box 27272SharjahUAE College of Engineering and Technology American University of the Middle EastKuwait Department of Mechanical and Industrial Engineering Louisiana State UniversityUSA

CO_(2) emission is considerably dependent on energy consumption and on share of energy sources as well as on the extent of economic ***,these factors must be considered for CO_(2) emission prediction for seven middle eastern countries including Iran,Kuwait,United Arab Emirates,Turkey,Saudi Arabia,Iraq and *** order to propose a predictive model,a Multilayer Perceptron Artificial Neural Network(MLP ANN)is *** transfer functions including logsig,tansig and radial basis functions are utilized in the hidden layer of the ***,various numbers of neurons are applied in the structure of the *** is revealed that using MLP ANN makes it possible to accurately predict CO_(2) emission of these *** addition,it is concluded that using logsig transfer function leads to the highest accuracy with minimum value of mean squared error(MSE)which is followed by the networks with radial basis and tansig transfer *** R-squared of the networks with logsig,radial basis and tansig transfer functions are 0.9998,0.9997 and 0.9996,***,comparison of the proposed model with a similar study,considered five countries in the same region,reveals higher accuracy in term of MSE.

关键词： CO_(2)emission artificial neural network middle eastern countries transfer function

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

Effect of Microalloying Additions on the Microstructure and Mechanical Properties of Low Carbon Steel

引用

Journal of Iron and Steel Research International 2011年第S1期18卷 246-251页

作者： EISSA mamdouh ABD El-Aziz Ahmed GHALI Saeed HALFA Hossam SABER Shady Central Metallurgical Research & Development Institute "CMRDI" Faculty of Material Science and Engineering German University in Cairo "GUC"

Low carbon steels are characterized by good weldability,formability and fracture toughness ***,the low strength levels of these steel grades limit their wide *** the other hand,increasing the strength by increasing the carbon content and alloying elements deteriorates the other *** this study,the microalloying technique was used to examine the possibility of attaining low carbon steels with good combination of strength,ductility and impact properties.A low carbon steel microalloyed with single addition of vanadium and another one microalloyed with combined addition of vanadium and titanium were used in this investigation and their properties were compared with non-microalloyed low carbon steel having the same base ***,other two nonmicroalloyed and V-microalloyed steels with higher carbon,silicon and manganese contents were also investigated to reveal the effect of base ***,hardness,room and zero temperature Charpy V-notch impact tests were conducted to evaluate the variations in the mechanical properties of low carbon hot forged steel containing vanadium and combinations of vanadium and *** addition,the microstructures of the different investigated steels were observed using both optical microscope and scanning electron ***,the hardness of the ferrite phase was also determined using micro-hardness *** results showed improvement of the mechanical properties of the investigated steels by both single V-and combined V + ***,hardness and impact tests results indicated that good combinations of strength,ductility and impact properties can be achieved by V-microalloying *** with combination of V and Ti microaddition has much higher hardness,yield strength,ultimate tensile strength and impact energy at both room and zero temperatures compared with non-microalloyed and single Vmicroalloyed *** C,Si and Mn contents result in

关键词： low carbon steels single microalloying combined microalloying strength ductility impact energy grain refinement precipitation strengthening

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

Calcium channel α2δ1 subunit as a novel biomarker for diagnosis of hepatocellular carcinoma

引用

Cancer Biology & Medicine 2018年第1期15卷 52-60页

作者： Sana Amhimmid Badr Maryan Waheeb Fahmi Manal Mahmoud Nomir mamdouh Mohammad El-Shishtawy Biochemistry Department Faculty of Pharmacy Medical Oncology Unit Internal Medicine DepartmentFaculty of Medicine Clinical Pathology Department Students Hospital Mansoura University

Objective:Hepatocellular carcinoma(HCC)is the fifth most common malignancy *** identification of new simple,inexpensive and highly accurate markers for HCC diagnosis and screening is *** case-control study evaluates the role of annexin A2 and voltage-gated calcium channelsα2δ1 subunit as serum biomarkers for HCC ***:The study comprised three groups:group 1,50 patients with an initial diagnosis of HCC associated with chronic hepatitis C virus infection;group 2,25 patients diagnosed with chronic hepatitis C virus infection and cirrhosis without any evidence of HCC;and group 3,15 healthy *** participants were subjected to clinical and laboratory investigations,and radiological *** serum levels of alpha-fetoprotein(AFP),annexin A2,and theα2δ1 subunit were evaluated by using ELISA ***:The serum levels of annexin A2 significantly increased in patients with HCC(10.4±2.5 ng/m L;P<0.001)or with cirrhosis(9.31±1.8 ng/m L;P<0.001)comparing to that of healthy controls(0.296±0.09 ng/m L).However,there was no significant difference in serum annexin A2 levels in patients with HCC comparing to those with ***α2δ1 subunit significantly increased in patients with HCC(20.12±3.7 ng/m L)comparing to that in patients with cirrhosis(10.41±3.4 ng/m L,P<0.001)and healthy controls(10.2±2.9 ng/m L,P<0.001).Conclusions:The serumα2δ1 subunit may function as a new biomarker for HCC ***,serum annexin A2 has low diagnostic value as an HCC marker,especially in patients with underlying cirrhosis.

关键词： Hepatocellular carcinoma tumor initiation cell marker α2δ1 subunit annexin A2 alpha-fetoprotein

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

Parameters Affecting Energy Consumption for Producing High Carbon Ferromanganese in a Closed Submerged Arc Furnace

引用

Journal of Iron and Steel Research International 2014年第7期21卷 666-672页

作者： Azza Ahmed Hossam Halfa Mohamed K.El-Fawakhry Hoda El-Faramawy mamdouh Eissa Steel Technology Metallurgical Research and Development Institute

The power consumption is considered to be the most important factor affecting the production cost of fer romanganese alloy. Different parameters affecting the energy consumption for industrial production of high carbon ferromanganese HCFeMn were investigated in a closed submerged arc furnace. The analysis of industrial data revealed that the most energy consumed factors were the direct reduction by solid carbon, Boudouard reaction, metal and slag formation, and decomposition of fluxing materials （limestone and dolomite）. To reduce the energy con- sumption and minimize the energy losses in the production process of HCFeMn, it was recommended to use Mn blend with minimum Mn to Fe ratio of 6 and lower SiO2 content or higher basicity. The added coke must be adjusted according to the material balance to prevent the over-coke and to minimize the highly endothermic ＂Boudouard reac tion＂. In addition, it was recommended to work at basic slags with the ratio of （CaO＋MgO） to Si（）2 equal to 1.0- 1.2 instead of much higher slag basicity. Furthermore, the mass losses had to be minimized through adjusting the handling and charging process and to take care of all metal produced.

关键词： high carbon ferromanganese production energy consumption carbonate decomposition Boudouard reaction slag basicity energy loss

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

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：