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Processing chain for 3D histogram of gradients based real-time object recognition

INTERNATIONAL JOURNAL OF ADVANCED ROBOTIC systems 2021年第1期18卷

作者： Vilar, Cristian Krug, Silvia Thornberg, Benny Mid Sweden Univ Dept Elect Design Holmgatan 10 S-85170 Sundsvall Sweden

3D object recognition has been a cutting-edge research topic since the popularization of depth cameras. These cameras enhance the perception of the environment and so are particularly suitable for autonomous robot navigation applications. Advanced deep learning approaches for 3D object recognition are based on complex algorithms and demand powerful hardware resources. However, autonomous robots and powered wheelchairs have limited resources, which affects the implementation of these algorithms for real-time performance. We propose to use instead a 3D voxel-based extension of the 2D histogram of oriented gradients (3DVHOG) as a handcrafted object descriptor for 3D object recognition in combination with a pose normalization method for rotational invariance and a supervised object classifier. The experimental goal is to reduce the overall complexity and the system hardware requirements, and thus enable a feasible real-time hardware implementation. This article compares the 3DVHOG object recognition rates with those of other 3D recognition approaches, using the ModelNet10 object data set as a reference. We analyze the recognition accuracy for 3DVHOG using a variety of voxel grid selections, different numbers of neurons (N-h ) in the single hidden layer feedforward neural network, and feature dimensionality reduction using principal component analysis. The experimental results show that the 3DVHOG descriptor achieves a recognition accuracy of 84.91% with a total processing time of 21.4 ms. Despite the lower recognition accuracy, this is close to the current state-of-the-art approaches for deep learning while enabling real-time performance.

关键词： 3D object recognition 3D image processing histogram of oriented gradients handcrafted descriptor embedded systems machine learning

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面向对象Java编程课程教学设计策略

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创新创业理论研究与实践 2024年第11期7卷 28-34,71页

作者：徐利锋丁维龙浙江工业大学计算机科学与技术学院浙江杭州310023

随着人工智能、云计算与物联网等信息技术在各领域的广泛应用,计算机信息系统改变了人们的工作和生活方式。而所有信息系统的实现都离不开编程技术。因而,在计算机教育领域,编程技能的培养日益受到重视。面向对象Java编程是计算机类专... 详细信息

随着人工智能、云计算与物联网等信息技术在各领域的广泛应用,计算机信息系统改变了人们的工作和生活方式。而所有信息系统的实现都离不开编程技术。因而,在计算机教育领域,编程技能的培养日益受到重视。面向对象Java编程是计算机类专业的重要课程之一,该文从课程的性质、定位、教学目标、教学内容设计、授课对象分析、教学方法以及课程评价等多个方面详细描述了该课程的教学设计,并以项目式学习的教学策略为主线,叙述了各部分的思路,以期与同行交流教学经验。

关键词：面向对象 Java语言教学设计教学研究项目式学习做中学

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An Authoritative Source of Truth System for UCAV Conceptual design

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IEEE ACCESS 2021年 9卷 145317-145333页

作者： Sun, Xiaojian Luo, Mingqiang Cui, Zhiyang Zou, Zhicheng Liu, Hu Beihang Univ Sch Aeronaut Sci & Engn Beijing 100191 Peoples R China

Model-Based systems Engineering (MBSE) is a part of a long-term trend toward model-centric approaches. The Authoritative Source of Truth (AST) is a crucial step of digital transformation and a core component of MBSE. Benefits include help design teams shorten the design cycle, improve design efficiency, and ensure the accuracy of design models and data compared to traditional document-based co-design methods. Data-driven design is a new direction of Unmanned Combat Aerial Vehicles (UCAV) design, and UCAV is the main force of future air warfare. How to build a UCAV conceptual design AST system is a problem that needs to be solved. We design an AST construction methodology, develop an AST system by applying the methodology, and use the UCAV concept design case to test the usability of the AST system. More specifically, the methodology includes construction goals and objects, basic construction methods, AST architecture, collaborative construction methods, dynamic management methods, basic functions and derivative tools required. In addition, the validation process is requirement analysis, functional architecture design, scheme design, and dynamic management validation. The AST system can help the implementation of MBSE in the field of aircraft design. The AST system can also help meet the requirements of the conceptual design stage, which shows the feasibility of the construction methodology's integrity. If the AST system is used in the aircraft's detailed design phase, further models and data will be required, and the AST system will need to be upgraded.

关键词： Data models object oriented modeling Modeling Atmospheric modeling Mathematical models Aircraft Tools Authoritative source of truth model-based systems engineering UCAV models and data conceptual design

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Verifying object Construction 20

Verifying Object Construction

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42nd ACM/IEEE International Conference on Software Engineering - Companion Proceedings (ICSE-Companion) / 42nd ACM/IEEE International Conference on Software Engineering - Software Engineering in Practice (ICSE-SEIP)

作者： Kellogg, Martin Ran, Manli Sridharan, Manu Schaf, Martin Ernst, Michael D. Univ Washington Seattle WA 98195 USA UC Riverside Riverside CA USA Amazon Web Serv Seattle WA USA

ISBN: (纸本)9781450371216

In object-oriented languages, constructors often have a combination of required and optional formal parameters. It is tedious and inconvenient for programmers to write a constructor by hand for each combination. The multitude of constructors is error-prone for clients, and client code is difficult to read due to the large number of constructor arguments. Therefore, programmers often use design patterns that enable more flexible object construction-the builder pattern, dependency injection, or factory methods. However, these design patterns can be too flexible: not all combinations of logical parameters lead to the construction of well-formed objects. When a client uses the builder pattern to construct an object, the compiler does not check that a valid set of values was provided. Incorrect use of builders can lead to security vulnerabilities, run-time crashes, and other problems. This work shows how to statically verify uses of object construction, such as the builder pattern. Using a simple specification language, programmers specify which combinations of logical arguments are permitted. Our compile-time analysis detects client code that may construct objects unsafely. Our analysis is based on a novel special case of typestate checking, accumulation analysis, that modularly reasons about accumulations of method calls. Because accumulation analysis does not require precise aliasing information for soundness, our analysis scales to industrial programs. We evaluated it on over 9 million lines of code, discovering defects which included previously-unknown security vulnerabilities and potential null-pointer violations in heavily-used open-source codebases. Our analysis has a low false positive rate and low annotation burden. Our implementation and experimental data are publicly available.

关键词： Pluggable type systems AMI sniping builder pattern lightweight verification Lombok AutoValue

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Hierarchical Modeling of Complex Internet of Things systems Using Conceptual Modeling Approaches

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IEEE ACCESS 2019年 7卷 102772-102791页

作者： Abbasi, Khurrum Mustafa Khan, Tamim Ahmed Ul Haq, Irfan Bahria Univ Dept Software Engn Islamabad 44000 Pakistan PIEAS Dept CIS Islamabad 45650 Pakistan

Popularity of the Internet of things (IoT) is currently on the rise. Academia as well as industry is equally fascinated by this disruptive technology. The IoT research and implementation have succeeded securing their place in numerous domains including, but not limited to, business, transportation and logistics, health care, smart cities, and agriculture. Conceptual modeling is pivotal to the design and implementation of a system. Various modeling approaches have been used for a variety of the IoT applications and case studies. In this paper, we examine various innovative applications of the existing conceptual modeling approaches for the IoT. We analyze the use of these approaches against different concerns in isolation as well as in mutual combination for the IoT. We also define a set of terminologies that we frequently encounter in this manuscript and those likely to be used while adopting proposed modeling approaches for the IoT scenarios. This study also attempts to reconcile different modeling approaches toward a unified modeling system. For this purpose, we map various conceptual modeling approaches against different layers of functional model of the IoT reference architecture. There is also a scenario in the end of the paper which elaborates the use of different modeling approaches in hierarchy for a complex IoT system.

关键词： Agent-based modeling ambient-oriented modeling aspect-oriented modeling conceptual modeling approaches contract-based modeling fuzzy-logic modeling the Internet of Things network-based modeling object-based modeling ontology service-oriented modeling

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object oriented Mathematical Modeling of Electrical Machines

Object Oriented Mathematical Modeling of Electrical Machines

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IEEE International Conference on Intelligent Energy and Power systems (IEPS)

作者： Vladyslav Pliuhin Maria Sukhonos Ihor Bileckiy O.M. Beketov National University of Urban Economy Kharkiv Ukraine

ISBN: (数字)9780738105680

ISBN: (纸本)9781665405157

This paper is concerned with the implementation of the concept of automated synthesis of electric machine mathematical models, depending on design and type of the latter. The proposed method of the mathematical model synthesis is based on the provisions of the object-oriented design theory, which is widely used in the field of information technology. A generalized electromechanical energy converter, a squirrel-cage induction motor, a synchronous motor, a DC motor and a transformer are considered as a reference. Due to the application of the object-oriented concept of hierarchy and inheritance, each individual electric machine is generated from a generalized electromechanical energy converter with the simultaneous synthesis of equations describing electrodynamic transients in the form of a product of parameters and currents matrix. It is proposed to use the practical application of the technique under consideration in the optimization of electrical machines in dynamic operating modes during the computer-aided design process.

关键词： Mathematical model Unified modeling language object oriented modeling Rotors Stator windings Solid modeling Induction motors

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基于UML的知识分享系统设计与实现

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科学技术创新 2022年第7期 81-84页

作者：顾涵文北京语言大学信息科学学院北京100083

随着科学技术的发展,使用电子设备记笔记的方式越来越受到广大知识工作者的青睐。针对用户对笔记记录和笔记纠错与分享的需求,使用了面向对象分析设计的基本思想,通过需求分析,确定了用例模型,并以此为依据,绘制了顺序图,进而确定了系... 详细信息

随着科学技术的发展,使用电子设备记笔记的方式越来越受到广大知识工作者的青睐。针对用户对笔记记录和笔记纠错与分享的需求,使用了面向对象分析设计的基本思想,通过需求分析,确定了用例模型,并以此为依据,绘制了顺序图,进而确定了系统架构,并使用Springboot,Vue,NLP(Natural Language Processing)等技术对系统进行了实现。本系统可被用于知识记录、知识分享与协同工作中,可以方便用户更快捷地记录知识与知识分享,增强了用户体验,对比已有的知识记录系统,使用了NLP技术对笔记进行自动纠错,提高了用户纠错效率。

关键词：面向对象系统设计 Springboot 知识分享 UML建模

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E-Transaction Services for Retail Business Process in IoT using object Analysis and design 2

E-Transaction Services for Retail Business Process in IoT us...

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2nd International Conference on Informatics, Engineering, Science, and Technology (INCITEST) - Building Competitive Advantage to Face Industry 4.0

作者： Hartono, T. Ramadhan, F. R. Nursikuwagus, A. Univ Komputer Indonesia Dept Informat Syst Bandung Indonesia

The transaction process in business is an important factor that must be maintained for a business increase. This activity can be maintained by computerized. Application of computer which help process business transactions is an important thing that should be provided. This research aims to provide a system that helps routine transaction in daily food sales. Transaction in this system has included activities such as ordering, fulfil orders, payment, recording, financing, and reporting to management. implementation of the system, that have used a prototype system development method. At each stage of the prototype is assisted by object-oriented programming, namely UML (Unified Modelling Language). use of UML diagrams includes use case diagrams, activity diagrams, sequence diagrams, class diagrams, and deployment diagrams. The results of this research are web technology-based transaction systems. The system has included order, delivery of an order, payment, order recording, and financial reporting for management. The system is made for the implementation of five main business processes that help the transaction system. The main business processes, that have created, is consisted of services, order, fulfil orders, financial services, and report for management.

关键词： Graphic methods

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DFTpy: An efficient and object-oriented platform for orbital-free DFT simulations

arXiv

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arXiv 2020年

作者： Shao, Xuecheng Jiang, Kaili Mi, Wenhui Genova, Alessandro Pavanello, Michele Department of Chemistry Rutgers University 73 Warren St. NewarkNJ07102 United States Department of Physics Rutgers University 101 Warren St. NewarkNJ07102 United States Kitware Inc. 1712 U.S. 9 Suite 300 Clifton ParkNY12065 United States

In silico materials design is hampered by the computational complexity of Kohn-Sham DFT, which scales cubically with the system size. Owing to the development of new-generation kinetic energy density functionals (KEDFs), orbital-free DFT (OFDFT, a linear-scaling method) can now be successfully applied to a large class of semiconductors and such finite systems as quantum dots and metal clusters. In this work, we present DFTpy, an open source software implementing OFDFT written entirely in Python 3 and outsourcing the computationally expensive operations to third-party modules, such as NumPy and SciPy. When fast simulations are in order, DFTpy exploits the fast Fourier transforms (FFTs) from PyFFTW. New-generation, nonlocal and density-dependent-kernel KEDFs are made computationally efficient by employing linear splines and other methods for fast kernel builds. We showcase DFTpy by solving for the electronic structure of a million-atom system of aluminum metal which was computed on a single CPU. The Python 3 implementation is object-oriented, opening the door to easy implementation of new features. As an example, we present a time-dependent OFDFT implementation (hydrodynamic DFT) which we use to compute the spectra of small metal cluster recovering qualitatively the time-dependent Kohn-Sham DFT result. The Python code base allows for easy implementation of APIs. We showcase the combination of DFTpy and ASE for molecular dynamics simulations (NVT) of liquid metals. DFTpy is released under the MIT license. Copyright © 2020, The Authors. All rights reserved.

关键词： Python

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Supporting the design, Commissioning and Supervision of Smart Factory Components through their Digital Twin

Supporting the Design, Commissioning and Supervision of Smar...

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IEEE International Conference on Autonomous Robot systems and Competitions (ICARSC)

作者： André Martins Hugo Costelha Carlos Neves Polytechnic of Leiria DEE ESTG Leiria Portugal Polytechnic of Leiria INESC TEC Porto Portugal ESTG Leiria Portugal Polytechnic of Leiria INESC COIMBRA Coimbra Portugal ESTG Leiria Portugal

ISBN: (数字)9781728170787

ISBN: (纸本)9781728170794

In a context of greater complexity of Smart Factories, the commissioning time for automated systems needs to be shortened. The use of virtual commissioning tools is a good contribution to achieve this goal. Ideally, those tools should be part of a virtual engineering environment sharing same virtual model, the digital twin, through the complete lifecycle of the automated system, namely the project, simulation, implementation and execution/monitoring/supervision and, eventually decommissioning phases. Such vision includes a digital twin with a broader use, which is consistent with the real system and one that can be used after the early design and commissioning phases. Finding a complete set of tools able to comply with the above requirements can be extremely challenging. In this paper we explore the use of the ABB RobotStudio software combined with the OPC UA standard with this vision in mind. Methodologies were defined to integrate both new generation and legacy equipment, as well as robot controllers and guidelines for equipment development. A key result of this work is the development of a set of virtual engineering tools and methodologies based on OPC UA and implemented using RobotStudio in order to accomplish the complete lifecycle support of an automated system, from the project and simulation phases, to the monitoring and supervision phases, suitable for integration in Industry 4.0 factories. Results are described for a test scenario with different devices.

关键词： Tools object oriented modeling Software Service robots Industries Smart manufacturing

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