检索结果-内蒙古大学图书馆

A STUDY ON THE ACTUAL STATE OF MAINTENANCE AND MEASURES FOR UTILIZATION OF MODERN CASTLES −A case of castles of Western Japan−

引用

AIJ Journal of technology and design 2023年第71期29卷 424-429页

作者： Watashita, Soutarou Ogura, Hiroka Kanazawa, Yuuki Architectural Design Course Graduate School of Natural Science and Technology Shimane Univ Japan Dept. of Integrated Engineering National Institute of Technology Yonago College Japan Dept. of Architecture Faculty of Engineering Hiroshima Institute of Technology Japan

In diversified community development, there is case to see utilization of castles as important. This study aims to clarify the actual conditions of maintaining and utilizing the castles. Their active utilization entails various cases using squares, formulating rules, and working on projects in collaboration with citizens. Approximately half of the castles, which only have stone walls and moats, do not have power supplies and water facilities. Thus, castle utilization has been completely neglected. In order to create a lively atmosphere in the castle, maintenance projects, in which not only the administrators but also citizens can participate, must be implemented. © 2023 Architectural Institute of Japan. All rights reserved.

关键词： Maintenance status Management Modern castle operation Utilization Utilization of the square

来源：评论

学校读者我要写书评

暂无评论

SEISMIC DAMPING EFFECTS OF DISPLACEMENT-RESTRAINT BUCKLING-RESTRAINED BRACES IN STEEL HIGH-RISE BUILDING STRUCTURES

引用

AIJ Journal of technology and design 2024年第76期30卷 1305-1310页

作者： Sakai, Makoto Tagawa, Hiroshi Chen, Xingchen Uehara, Makoto Nishimura, Makoto Structural Design Dept. Tekken Corporation Japan Graduate School of Advanced Science and Engineering Hiroshima Univ. Japan Architectural Technology Dept. Tekken Corporation Japan

The use of buckling-restrained brace in frames shortens the natural period and possibly increases the seismic input. To overcome this issue, this paper proposes a displacement-restraint buckling-restrained brace in which no axial force occurs initially and the axial force occurs with a delay. Thereby, the natural period can maintain the same level as the moment frame without bracing and the concentration of the deformation into the local stories can be avoided. In this study, a trial design and seismic response analyses of a high-rise building model are conducted to reveal the effectiveness of the proposed braces. © 2024 Architectural Institute of Japan. All rights reserved.

关键词： Buckling

来源：评论

学校读者我要写书评

暂无评论

Sybil Assault Detection in VANET with Efficient Network Analysis

Sybil Assault Detection in VANET with Efficient Network Anal...

引用

2024 MIT Art, design and technology school of Computing International Conference, MITADTSoCiCon 2024

作者： Mukherjee Mathur, Shubhra Jadhav, Nagesh Gupta, Ravindra Design and Technology University Pune Sarvepalli Radakrishnan University School of Computing MIT Art Department of Computer Science and Engineering Bhopal India Design and Technology University School of Computing MIT Art Department of Computer Science and Engineering Pune India Sarvepalli Radakrishnan University School of Computing Department of Computer Science and Engineering Bhopal India

ISBN: (纸本)9798350362879

A developing technology that can be highly helpful for both intelligent transportation services and safety and security is the Automobile ad hoc network, or VANET. Nevertheless because of the great mobility and wireless connection of cars, there are numerous security risks that jeopardize people's safety and security when driving. The Sybil assault, in which the perpetrator makes up a false identity to obtain significant influence within the network and delay certain services and manipulate others by fictitious voting, is one of the main security issues. People can avoid being duped by an attacker or falling into traps when attacks are detected early. This study describes two methods for detecting Sybil attacks: the first uses the Poisson Distribution Method in order to forecast traffic on the street, whereas the latter examines network efficiency for packet delivery ratio (PDR) in both benign additionally malicious environments. According to the simulation's findings, PDR lowers the number of fictitious cars in the network. Our method is straightforward and efficient because it doesn't involve a lot of computational overhead and doesn't breach users' privacy concerns. © 2024 IEEE.

关键词： Poisson distribution

来源：评论

学校读者我要写书评

暂无评论

The influence of roll angles on unsteady aerodynamics in a canard-configured missile

引用

International Journal of Mechanical System Dynamics 2024年第2期4卷 213-225页

作者： Kai Wei Shaosong Chen Dongdong Tang Yihang Xu Xujian Lyu Qing Chen School of Energy and Power Engineering Nanjing University of Science and TechnologyNanjingChina Shanghai Institute of Spacecraft Equipment ShanghaiChina Jiangnan Design Institute of Mechanical and Electrical GuiyangChina

During the initial stage of vertical launch,a missile may exhibit an uncertain roll angle(φ)and a high angle of attack(α).This study focuses on examining the impact of roll angle variations on the flow field and the unsteady aerodynamics of a canard-configured missile atα=75°.Simulations were performed using the validated k-ωSST turbulence *** analysis encompasses the temporal development of vortices,the oscillatory characteristics of the lateral force,and the fluctuation of kinetic energy distribution within the framework of proper orthogonal decomposition(POD).The results indicate that the flow field surrounding the canardconfigured missile is characterized by inconsistent shedding cycles of Kármán-like and canard-separated vortices.A distinct transition zone is identified between these vortices,where vortex tearing and reconnection phenomena *** increasing roll angles from 0°to 45°,there is an observed shift in the dominant frequency of the lateral force from the higher frequency associated with Kármán-like vortex shedding to the lower frequency of canard vortex *** shedding frequency of Kármán-like vortices corresponds to the harmonics of the canard vortex shedding frequency,indicative of a higher-order harmonic *** frequency of the lateral force is observed to decrease with an increase in roll angle,except in configurations lacking distinct canard-separated vortices,which are characterized by a“+”*** POD analysis reveals that the majority of the fluctuation energy is concentrated in the oscillations and shedding of the canard-separated vortices,leading to pressure fluctuations that are primarily observed on the canard and the downstream region of the canard.

关键词： large angle of attack roll angle unsteady separated flow power spectral density proper orthogonal decomposition

来源：评论

学校读者我要写书评

暂无评论

Color effect of landscape architecture design under computer aided collaborative design system

引用

Computer-Aided design and Applications 2022年第S3期19卷 13-22页

作者： Zhang, Min Deng, Xun School of Arts and Design Anhui University of Technology MaAnshan243032 China School of Architectural Engineering Hefei Technology College Chaohu238000 China

Color is an indispensable and important factor in landscape design. Based on the computer aided collaborative design system, this paper establishes a landscape design model. This paper focuses on the important role of color collocation in landscape design, which can improve the artistic and aesthetic quality of landscape design. Starting from the color extraction of landscape architecture, this paper discusses the emotional guidance of color in the design of street interface space through the study of "environmental emotional structure". SD method was used for color space perception evaluation to capture the scale of color emotional effect. Factor analysis of each variable is carried out to obtain the psychological structure of urban residents, the emotional phenomenon of color in scenic spots under the influence of color psychological effect and color grouping. The emotional phenomenon of color in street space influences the main line of the emotional structure of gardens, guides the design of the spatial color context and the establishment of the relationship between space and emotion, and provides directions for shaping the color themes of different landscape gardens. © 2022 CAD Solutions, LLC,.

关键词： Color

来源：评论

学校读者我要写书评

暂无评论

Efficient Bit-Plane Based Medical Image Cryptosystem Using Novel and Robust Sine-Cosine Chaotic Map

引用

Computers, Materials & Continua 2025年第4期83卷 917-933页

作者： Zeric Tabekoueng Njitacke Louai A.Maghrabi Musheer Ahmad Turki Althaqafi Department of Electrical and Electronic Engineering College of Technology(COT)University of BueaBueaP.O.Box 63Cameroon Department of Software Engineering College of EngineeringUniversity of Business and TechnologyJeddah22246Saudi Arabia Department of Computer Engineering Jamia Millia IslamiaNew Delhi110025India Department of Computer Science School of EngineeringComputing and DesignDar Al-Hekma UniversityJeddah22246Saudi Arabia

This paper presents a high-security medical image encryption method that leverages a novel and robust sine-cosine *** map demonstrates remarkable chaotic dynamics over a wide range of *** employ nonlinear analytical tools to thoroughly investigate the dynamics of the chaotic map,which allows us to select optimal parameter configurations for the encryption *** findings indicate that the proposed sine-cosine map is capable of generating a rich variety of chaotic attractors,an essential characteristic for effective *** encryption technique is based on bit-plane decomposition,wherein a plain image is divided into distinct bit *** planes are organized into two matrices:one containing the most significant bit planes and the other housing the least significant *** subsequent phases of chaotic confusion and diffusion utilize these matrices to enhance *** auxiliary matrix is then generated,comprising the combined bit planes that yield the final encrypted *** results demonstrate that our proposed technique achieves a commendable level of security for safeguarding sensitive patient information in medical *** a result,image quality is evaluated using the Structural Similarity Index(SSIM),yielding values close to zero for encrypted images and approaching one for decrypted ***,the entropy values of the encrypted images are near 8,with a Number of Pixel Change Rate(NPCR)and Unified Average Change Intensity(UACI)exceeding 99.50%and 33%,***,quantitative assessments of occlusion attacks,along with comparisons to leading algorithms,validate the integrity and efficacy of our medical image encryption approach.

关键词： Image cryptosystem robust chaos sine-cosine map nonlinear analysis tools medical images

来源：评论

学校读者我要写书评

暂无评论

Machine learning–based prediction of unconfined compressive strength and contaminant leachability in dredged contaminated sediments for land reclamation projects

引用

Environmental Science and Pollution Research 2025年第13期32卷 8160-8182页

作者： Mastoi, Aamir Khan Hameed, Saifal Ali, Mutahar Traore, Abdoul Fatah Institute of Geotechnical and Underground Engineering School of Civil Engineering & Hydraulics Huazhong University of Science and Technology 318 6th Building of the West Wuhan430074 China Civil Engineering Department Aror University of Art Architecture Design and Heritage Sindh Sukkur Pakistan Department of Civil Engineering Quaid-E-Awam University of Engineering Sciences and Technology Sindh Nawabshah67450 Pakistan

This research investigates the application of machine learning techniques for predicting unconfined compressive strength (UCS) and contaminant leachability in dredged contaminated sediments (DCS) with implications for land reclamation projects. Traditionally, determining these parameters has been challenging, costly, and time-consuming, hindering efficient project planning and execution. Therefore, this study evaluated the efficacy of two machine learning models, namely extreme gradient boosting (XGBoost) and decision tree (DT), in improving prediction accuracy and reducing the need for resource-intensive testing procedures. The models were constructed using 165 data samples and 6 input parameters. The models’ generalizability and predictive performance were evaluated using Monte Carlo and K-fold cross-validation approaches. Results indicate that the XGBoost model outperforms DT, exhibiting superior prediction accuracy and consistency with best typical metrics such as higher adjusted R-squared (Adj. R2) and lower root mean square error (RMSE) and mean absolute error (MAE) values. The sensitivity analysis of models shows that the ground granulated blast furnace slag (GGBS) content has a significant impact on the prediction of UCS, whereas the zinc concentration level (Z) has a significant effect on the leachability of zinc. These findings demonstrate the ability of machine learning to refine prediction algorithms for DCS performance, allowing for more efficient and cost-effective land reclamation initiatives. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Blast furnaces

来源：评论

学校读者我要写书评

暂无评论

Effect of confining pressure on rock breaking by high-pressure waterjet-assisted TBM

引用

Underground Space 2024年第5期18卷 151-161页

作者： Chen Xu Yujie Zhu Xiaoli Liu Fei Chen Min Zhu Enzhi Wang Sijing Wang School of Resource and Environment Engineering Wuhan University of TechnologyWuhan 430070China Changjiang Institute of Survey PlanningDesign and ResearchWuhan 430010China State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing 100084China Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources Wuhan 430010China

High-pressure waterjet-assisted tunnel boring machine(WTBM)is an efficient method for improving the tunneling performance of a tunnel boring machine(TBM)and reducing the wear of its disc cutters in hard rock with high *** pressure directly affects the efficiency of rock breaking and the configuration of the disc *** this study,we evaluated the effect of confining pressure on WTBM rock breaking by developing a self-designed and manufactured experimental system,including confining pressure loading,TBM disc-cutter penetration,and high-pressure *** macro fracture,acoustic emission(AE),peak normal force drop,and specific energy(SE)were analyzed for four different confining pressures(10,20,30,and 35 MPa).The results showed that the cutting depth of the waterjet increased linearly as the waterjet pressure increased and decreased with the gradual increase in the nozzle moving *** expansion and development of cracks formed rock debris,and the size of the rock fragments decreased with an increase in confining *** the waterjet pressure was 280 MPa,the nozzle moving velocity was 800 mm/min and the kerf space was 75 mm,which indicated that the confining pressure,which was 23.16 MPa,minimized the cutting SE under this ***,regardless of the confining pressure,the maximum normal force of WTBM was less than that of a TBM,whereas the SE of WTBM was less than that of complete TBM cutting mode(CTCM).The average force drop and average drop rate of SE were approximately 25%,and 80%,*** results of this study can inspire the design and mechanism of a TBM assisted by a high-pressure waterjet.

关键词： Waterjet Tunnel boring machine(TBM) Confining pressure Specific energy Force drop

来源：评论

学校读者我要写书评

暂无评论

SEMI-AUTOMATED MINING OF CUSTOMER REVIEWS TO IDENTIFY design PROBLEMS OF CANTILEVER-STYLE BASSINETS

SEMI-AUTOMATED MINING OF CUSTOMER REVIEWS TO IDENTIFY DESIGN...

引用

ASME 2024 International design engineering Technical Conferences and Computers and Information in engineering Conference, IDETC-CIE 2024

作者： Singhose, William Adams, Christopher Martinez, Rebecca Rana, Anjnee Kim, Dooroo Li, Wayne Woodruff School of Mechanical Engineering Georgia Institute of Technology AtlantaGA United States School of Industrial Design Georgia Institute of Technology AtlantaGA United States

ISBN: (纸本)9780791888407

Customer reviews posted online provide a massive dataset that can identify product defects. Locating informative reviews of a specific product is straightforward. However, it can be challenging to extract information that informs product designers of potential defects and drives useful testing to investigate the potential defect. Such data extraction can be manually performed in a reliable and effective manner by skilled engineers. However, such an approach can be time-consuming and expensive. On the other hand, completely automated data extraction would likely yield generic results that are not particularly useful. This paper describes a semi-automated process wherein researchers develop an informed search algorithm that is based on an initial engineering assessment of a product that identifies potential design problems and words sets that are associated with the potential defects. An automated search process then operates on the review database to greatly streamline the data analysis process. The product reviews that indicate product defects are grouped together and associated with design features. The design features that are linked to the largest classes of complaints are then rigorously tested to evaluate the credibility and accuracy of the online complaints. The process is illustrated via a case study and testing of a cantilever-style bassinet. Copyright © 2024 by ASME.

关键词： User centered design

来源：评论

学校读者我要写书评

暂无评论

Advance-FL: A3C-based Adaptive Asynchronous Online Federated Learning for Vehicular Edge Cloud Computing Networks

IEEE Transactions on Intelligent Vehicles

引用

IEEE Transactions on Intelligent Vehicles 2024年 1-19页

作者： Ma, Guifu Bian, Yougang Qin, Hongmao Yin, Chenlong Chen, Chaoyi Li, Shengbo Eben Li, Keqiang State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle College of Mechanical and Vehicle Engineering Hunan University Changsha China School of Vehicle and Mobility Tsinghua University Beijing China

Enhancing autonomous driving through Federated Learning (FL) in Intelligent Connected Vehicles (ICVs) confronts challenges like limited scalability of central management, computational strains on diverse ICVs, and inefficiencies due to stragglers. This paper presents Advance-FL, a deep reinforcement learning based Adaptive asynchronous online Federated Learning with a computation offloading assisted framework for vehicular edge cloud computing networks to mitigate the above challenges. Innovatively, Advance-FL incorporates the concept of “straggler rate”, a metric originally introduced in this study to quantify the degree of lag in participant computation and training, thus enabling targeted mitigation strategies. By employing an asynchronous advantage actor-critic approach for adaptive data offloading and dynamic local iteration adjustments, Advance-FL effectively alleviates computation resource shortages and harmonizes the balance between model accuracy and straggler impact by dynamically managing the straggler rate. Critical findings include over 62% reduction in training times and a 2% ∼ 9% increase in model accuracy across varying non-IID data scenarios and reducing training time by more than 6 times as the number of ICVs increases, compared to prevailing methods. Additionally, experiments in both static and dynamic test-bed further validate Advance-FL's superior scalability and robustness over state-of-the-art approaches, particularly in maintaining high performance under straggler effects, and showcasing robust adaptability across long-term operations, large-scale datasets and abnormal situations IEEE

关键词： Reinforcement learning

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：