检索结果-南通市图书馆

Determination of rock mass integrity coefficient using a non-invasive geophysical approach

Journal of Rock Mechanics and Geotechnical Engineering 2023年第6期15卷 1426-1440页

作者： Muhammad hasan Yanjun Shang Xuetao Yi Peng Shao Meng He Key Laboratory of Shale Gas and Geoengineering(KLSGG) Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing100049China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing100029China

Determination of rock mechanical parameters is the most important step in rock mass quality evaluation and has significant impacts on geotechnical engineering *** mass integrity coefficient(KV)is one of the most efficient parameters,which is conventionally determined from *** approaches,however,are time-consuming and expensive,offer low data coverage of point measurements,require heavy equipment,and are hardly conducted in steep topographic ***,borehole approaches cannot assess the subsurface thoroughly for rock mass quality ***,use of geophysical methods is non-invasive,rapid and *** proposed geophysical approach makes useful empirical correlation between geophysical and geotechnical *** evaluated the rock mass quality via integration between KV measured from the limited boreholes and inverted resistivity obtained from electrical resistivity tomography(ERT).The borehole-ERT correlation provided KV along various geophysical profiles for more detailed 2D/3D(two-/three-dimensional)mapping of rock mass *** subsurface was thoroughly evaluated for rock masses with different engineering qualities,including highly weathered rock,semi-weathered rock,and fresh ***,ERT was integrated with induced polarization(IP)to resolve the uncertainty caused by water/clay *** results show that the proposed method,compared with the conventional approaches,can reduce the ambiguities caused by inadequate data,and give more accurate insights into the subsurface for rock mass quality evaluation.

关键词： Geotechnical engineering Rock mass integrity coefficient Rock mechanical parameters Geophysical parameters Electrical resistivity tomography(ERT) Induced polarization(IP)

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 optimization of a grid-tied microgrid for a residential community in southern Bangladesh

引用

Clean Energy 2023年第6期7卷 1300-1315页

作者： Sayeed hasan MdRifat Hazari Effat Jahan Mohammad Abdul Mannan Department of Electrical and Electronic Engineering American International University-Bangladesh(AIUB)408/1KuratoliKhilkhetDhaka 1229Bangladesh Center for Sustainable Energy Research(CSER) Dr.Anwarul Abedin Institute of InnovationAmerican International University-Bangladesh(AIUB)408/1KuratoliKhilkhetDhaka 1229Bangladesh

Growing energy demand,diminishing fossil fuel reserves and geopolitical tensions are serious concerns for any country’s energy strategy and *** factors have a greater impact on developing countries,as many of them rely largely on traditional energy *** energy generation is the viable alternative for mitigating these problems,as well as achieving energy independ-ence and tackling climate *** article discusses planning and design optimization of a residential community microgrid based on multiple renewable *** particular,the design and techno-economic assessment of a grid-tied hybrid microgrid for meeting the electricity demand of an alluvial region,Urir Char,located in southern Bangladesh,was *** Optimization of Multiple Energy Resources is used for the evaluation and it is supplemented by a fuzzy-logic-based load profile design *** addition to the analysis,a predictive load-shifting-based demand management is also *** cases were considered for the studies and,after considering several criteria,a grid-tied system comprising a photovoltaic array,wind turbine and energy storage system was found to be the best fit for powering the *** suggested system reduces the life-cycle cost by 18.3%,the levelized cost of energy by 61.9%and emissions by 77.2%when compared with the grid-only *** with the microgrid design,cooking emissions and energy categorization were also discussed.

关键词： demand-side management fuzzy logic load profile generator net-zero energy residential microgrid techno-economic analysis

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

Optimized Generative Adversarial Networks for Adversarial Sample Generation

引用

Computers, Materials & Continua 2022年第8期72卷 3877-3897页

作者： Daniyal M.Alghazzawi Syed Hamid hasan Surbhi Bhatia Faculty of Computing and Information Technology King Abdulaziz UniversityJeddah21589Saudi Arabia Department of Information Systems College of Computer Sciences and Information TechnologyKing Faisal UniversitySaudi Arabia

Detecting the anomalous entity in real-time network traffic is a popular area of research in recent *** few researches have focused on creating malware that fools the intrusion detection system and this paper focuses on this *** are using Deep Convolutional Generative Adversarial Networks(DCGAN)to trick the malware classifier to believe it is a normal *** this work,a new dataset is created to fool the Artificial Intelligence(AI)based malware detectors,and it consists of different types of attacks such as Denial of Service(DoS),scan 11,scan 44,botnet,spam,User Datagram Portal(UDP)scan,and ssh *** discriminator used in the DCGAN discriminates two different attack classes(anomaly and synthetic)and one normal *** model collapse,instability,and vanishing gradient issues associated with the DCGAN are overcome using the proposed hybrid Aquila optimizer-based Mine blast harmony search algorithm(AO-MBHS).This algorithm helps the generator to create realistic malware samples to be undetected by the *** performance of the proposed methodology is evaluated using different performance metrics such as training time,detection rate,F-Score,loss function,Accuracy,False alarm rate,*** superiority of the hybrid AO-MBHS based DCGAN model is noticed when the detection rate is changed to 0 after the retraining method to make the defensive technique hard to be noticed by the malware detection *** support vector machines(SVM)is used as the malicious traffic detection application and its True positive rate(TPR)goes from 80%to 0%after retraining the proposed model which shows the efficiency of the proposed model in hiding the samples.

关键词： Aquila optimizer convolutional generative adversarial networks mine blast harmony search algorithm network traffic dataset adversarial artificial intelligence techniques

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

Non-isolated Step-up DC-DC Converter Based on Switched Capacitor Cells

引用

CSEE Journal of Power and Energy Systems 2023年第3期9卷 1161-1172页

作者： Farid Mohammadi Gevork B.Gharehpetian hasan Rastegar Mohammad Farhadi-Kangarlu Amirkabir university of technology TehranIran Faculty of Electrical and Computer Engineering Urmia UniversityUrmiaIran

A non-isolated high gain step-up DC-DC converter for low power applications is suggested in this *** the designed transformerless converter,the main switch current and voltage stress is reduced while maintaining high voltage *** instance,with a duty cycle of 0.5 a voltage gain equal to 5 is achieved while the normalized switch voltage stress is ***,it decreases power losses of active and passive *** the proposed converter design,the switched-capacitor(SC)technique is used to obtain maximum voltage transfer gain using only one *** three modes of operation,i.e.,continuous conduction mode(CCM),boundary conduction mode(BCM),and discontinuous conduction mode(DCM),are studied in *** small signal analysis(SSA)of the designed converter is investigated,and its steady-state model is examined under *** of the proposed converter proposed in this study is assessed and tested using a *** of the converter is recorded above 94%in a wide range of output ***,compared to the other converters,the results suggest satisfactory performance of the designed *** issue of the proposed converter is that its input current is not smooth due to using the switched-capacitor cell in its *** issue is alleviated by using input filters.

关键词： DC-DC converter high voltage gain nonisolated switched capacitor cell voltage stress

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

Surveys on line drawing simplification for Chinese cultural computing

引用

The Journal of China Universities of Posts and Telecommunications 2022年第2期29卷 33-42页

作者： Chen Jiazhou Amal Ahmed hasan Mohammed Huang Keyu Miao Yongwei School of Computer Science and Technology Zhejiang University of TechnologyHangzhou 310023China School of Information Science and Technology Hangzhou Normal UniversityHangzhou 311121China

In the recent decade,many approaches of rough line drawing simplification were proposed,but they are not well summarized yet,especially from the perspective of Chinese cultural *** this paper,a comprehensive review of existing line drawing simplification methods was presented,including their algorithms,advantages/disadvantages,inputs/outputs,datasets and source codes,*** raster line drawings,related simplification work was discussed according to four main categories:fitting-based methods,tracing-based methods,field-based methods,and learning-based *** vector line drawings,a deep investigation was introduced for two major steps of simplification:stroke grouping and stroke ***,conclusions were given,key challenges and future directions of line drawing simplification for Chinese traditional art were thoroughly discussed.

关键词： line drawing sketch simplification cultural computing

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

A Highly Accurate Dysphonia Detection System Using Linear Discriminant Analysis

引用

Computer Systems Science & Engineering 2023年第3期44卷 1921-1938页

作者： Anas Basalamah Mahedi hasan Shovan Bhowmik Shaikh Akib Shahriyar Department of Computer Engineering Umm Al-Qura UniversityMakkahSaudi Arabia Department of Computer Science and Engineering Khulna University of Engineering&TechnologyKhulna9203Bangladesh

The recognition of pathological voice is considered a difficult task for speech ***,otolaryngologists needed to rely on oral communication with patients to discover traces of voice pathologies like dysphonia that are caused by voice alteration of vocal folds and their accuracy is between 60%–70%.To enhance detection accuracy and reduce processing speed of dysphonia detection,a novel approach is proposed in this *** have leveraged Linear Discriminant Analysis(LDA)to train multiple Machine Learning(ML)models for dysphonia *** ML models are utilized like Support Vector Machine(SVM),Logistic Regression,and K-nearest neighbor(K-NN)to predict the voice pathologies based on features like Mel-Frequency Cepstral Coefficients(MFCC),Fundamental Frequency(F0),Shimmer(%),Jitter(%),and Harmonic to Noise Ratio(HNR).The experiments were performed using Saarbrucken Voice Data-base(SVD)and a privately collected *** K-fold cross-validation approach was incorporated to increase the robustness and stability of the ML *** to the experimental results,our proposed approach has a 70%increase in processing speed over Principal Component Analysis(PCA)and performs remarkably well with a recognition accuracy of 95.24%on the SVD dataset surpassing the previous best accuracy of 82.37%.In the case of the private dataset,our proposed method achieved an accuracy rate of 93.37%.It can be an effective non-invasive method to detect dysphonia.

关键词： Dimensionality reduction dysphonia detection linear discriminant analysis logistic regression speech feature extraction support vector machine

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

Barriers to big data analytics (BDA) implementation in manufacturing supply chains

引用

Journal of Management Analytics 2023年第1期10卷 191-222页

作者： Amirhossein Dehkhodaei Bahar Amiri hasan Farsijani Abbas Raad Department of Management and Accounting Shahid Beheshti UniversityTehranIran

Big data analysis(BDA)can increase the capability of supply chain analysis of manufacturing ***,many manufacturing companies want to use BDA,but it has been seen that BDA implementation is difficult,especially in developing countries due to the existence of various barriers related to finance,government regulations,*** paper aims to investigate the barriers to BDA implementation in Iranian *** literature,limited work has been done on identifying barriers to implementing BDA in developing *** this regard,34 barriers were identified to BDA adoption in Iran by employing a literature review and feedback received from ***,the most important barriers(14)were analyzed using integrated Interpretive Structural Modeling and MICMAC *** show that two barriers;namely,lack of sufficient knowledge of senior managers and weakness of governance policies,are the most ***,crucial policy measures and recommendations are proposed to assist managers and government bodies.

关键词： Barriers Big data analytics Interpretive Structural Modeling(ISM) MICMAC Analysis Modeling Supply Chain Management

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

Identification of Composite-Metal Bolted Structures with Nonlinear Contact Effect

引用

Computers, Materials & Continua 2022年第2期70卷 3383-3397页

作者： Mohammad Ghalandari Ibrahim Mahariq Majid Pourghasem hasan Mulki Fahd Jarad Department of Aerospace Engineering Sharif University of TechnologyTehranIran College of Engineering and Technology American University of theMiddle EastKuwait Faculty of Mechanical and Mechatronics Engineering IHUTehranIran Department of Mathematics Cankaya UniversityEtimesgutAnkaraTurkey Department of Medical Research China Medical University HospitalChina Medical UniversityTaichungTaiwan

The middle layer model has been used in recent years to better describe the connection behavior in composite *** influencing parameters including low pre-screw and high preload have the main effects on nonlinear behavior of the connection as well as the amplitude of the excitation force applied to the ***,in this study,the effects of connection behavior on the general structure in two sections of increasing damping and reducing the stiffness of the structures that lead to non-linear phenomena have been *** to the fact that in composite structure we are faced to the limitation of increasing screw preload which tend to structural damage,so the investigation on the hybrid connection(metal-composite)behavior is *** this research,using the two-dimensional middle layer theory,the stiffness properties of the connection are modeled by normal stiffness and the connection damping is modeled using the structural damping in the shear *** frequency response diagrams have been extracted twice for two different excitation forces and then proposed by a high-order multitasking approximation according to the response range of the nonlinear finite element model for stiffness and damping of the *** effect of increasing the amplitude of the excitation force and decreasing the preload of the screw on the nonlinear behavior of the component has been *** results show that the limited presented novel component model has been accurately verified on the model obtained from the vibration experimental test and the reduction of nonlinear model updating based on that is *** comparison results show good agreementwith a maximumof 1.33%error.

关键词： Nonlinear equation hybrid joint behavior thin laminated element nonlinear frequency response 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

Exploring the Approaches to Data Flow Computing

引用

Computers, Materials & Continua 2022年第5期71卷 2333-2346页

作者： Mohammad B.Khan Abdul R.Khan hasan Alkahtani Department of Electrical and Computer Engineering Technical University of MunichArcisstrasse 2180333 MunichGermany Department of Computer Science CCSITKing Faisal University31982Al AhsaKSA

Architectures based on the data flow computing model provide an alternative to the conventional Von-Neumann architecture that are widelyused for general purpose *** based on the data flow architecture employ fine-grain data-driven *** architectures have thepotential to exploit the inherent parallelism in compute intensive applicationslike signal processing,image and video processing and so on and can thusachieve faster throughputs and higher power *** this paper,severaldata flow computing architectures are explored,and their main architecturalfeatures are ***,a classification of the processors is presented based on whether they employ either the data flow execution modelexclusively or in combination with the control flow model and are accordinglygrouped as exclusive data flow or hybrid *** hybrid categoryis further subdivided as conjoint or accelerator-style architectures dependingon how they deploy and separate the data flow and control flow executionmodel within their execution ***,a brief comparison and discussionof their advantages and drawbacks is also *** this study weconclude that although the data flow architectures are seen to have maturedsignificantly,issues like data-structure handling and lack of efficient placementand scheduling algorithms have prevented these from becoming commerciallyviable.

关键词： Processor architecture data flow architectures Von-Neumann model control flow architectures

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

Torsional postbuckling characteristics of functionally graded graphene enhanced laminated truncated conical shell with temperature dependent material properties

引用

Theoretical & Applied Mechanics Letters 2023年第4期13卷 272-279页

作者： Hamad M.hasan Saad S.Alkhfaji Sattar A.Mutlag Department of Mechanical Engineering University of AnbarRamadi 31001Iraq Department of Medical Instrumentation Engineering Ashur University CollegeBaghdad 10044Iraq

Buckling and postbuckling characteristics of laminated graphene-enhanced composite(GEC)truncated conical shells exposed to torsion under temperature conditions using finite element method(FEM)simulation are presented in this *** the thickness direction,the GEC layers of the conical shell are ordered in a piece-wise arrangement of functionally graded(FG)distribution,with each layer containing a variable volume fraction for graphene *** calculate the properties of temperaturedependent material of GEC layers,the extended Halpin-Tsai micromechanical framework is *** FEM model is verified via comparing the current results obtained with the theoretical estimates for homogeneous,laminated cylindrical,and conical shells,the FEM model is *** computational results show that a piece-wise FG graphene volume fraction distribution can improve the torque of critical buckling and torsional postbuckling ***,the geometric parameters have a critical impact on the stability of the conical ***,a temperature rise can reduce the crucial torsional buckling torque as well as the GEC laminated truncated conical shell’s postbuckling strength.

关键词： Torsional postbuckling Graphene enhanced composite Functionally graded graphene Finite element method Conical shell

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：