检索结果-内蒙古大学图书馆

A Two-Stage Energy-Efficiency Optimization Approach for Conflict-Free Dispatching in Open-Pit Mines

IET INTELLIGENT TRANSPORT SYSTEMS 2025年第1期19卷

作者： Wang, Zhichao Yang, Jue Feng, Yanbiao Kang, Yiting Li, Yong Univ Sci & Technol Beijing Sch Mech Engn Beijing Peoples R China

The objective of this paper is to present a novel energy-efficiency conflict-free dispatching algorithm for autonomous mining fleets. In lieu of halting or decelerating the trucks at intersections when conflicts arise, the algorithm facilitates conflict-free dispatching for trucks to operate with the optimal speed trajectory, thereby achieving minimum fuel consumption and mining cost. This work first develops reference speed trajectories for mining trucks, considering their drivetrain characteristics, load status and geographic information pertaining to the path. Second, the total production determination model is based on the MILP model, which determines the total production of each path while taking the travel time into account with the objective of maximizing fleet production. Next, in the fleet allocation model and conflict-free scheduling model, the objectives are to reduce the fleet make span and fleet queuing time, respectively. Finally, a fleet operation timetable is eventually derived. Therefore, all trucks can operate intact according to the speed trajectory, thus minimizing fleet energy consumption and maximizing production efficiency. To verify the advantages of the model in this work, we selected DISPATCH and a multi-objective dispatching model developed by other researchers for comparison on the basis of the historical production data from an open pit coal mine. The results indicated that the proposed model exhibited the capacity to decrease the fleet size by 22.2%, thereby attaining equivalent production levels to those of a real open-pit coal mining fleet. Moreover, the model proposed in this paper can improve the production by about 36.11% to 49.75% compared to DISPATCH under the optimal speed trajectory, whereas the multi-objective dispatching model's improvement is only 9.84% to 21.89%. It also has significant advantages in terms of fleet productivity and fleet profit.

关键词： collision avoidance mining object-oriented programming road traffic control traffic management and control

来源：评论

学校读者我要写书评

暂无评论

An object-oriented finite element framework for modified cam clay model

An Object-oriented finite element framework for modified cam...

引用

International Conference on Design, Manufacturing and Materials Engineering (ICDMME)

作者： Devi, Dipika Singh, A. K. NERIST Dept Civil Engn Nirjuli 791109 Arunachal Prade India Indian Inst Technol Guwahati Dept Civil Engn Gauhati 781039 Assam India

In this paper, an object-oriented finite element framework is developed and modified cam clay model, which is an elasto-plastic soil constitutive model, is implemented with it. The paper briefly describes the approach of implementing the steps of finite element analysis in object-oriented programming paradigm. An implicit integration algorithm for modified cam clay model is implemented in the proposed framework, which can be used to solve boundary value problems in geotechnical engineering. The framework ensures the maintainability and extensibility of the program to implement new tasks that may be in the form of the addition of a new constitutive model with different integration algorithms, and hence it can be used for research purposes in the field of geotechnical engineering. Numerical investigations are performed to validate the stability and accuracy of the proposed framework, which also demonstrate the effectiveness of object-oriented programming in finite element analysis. Numerical examples include triaxial compression tests on normally consolidated clay (NCC) and overconsolidated clay (OCC) and bearing capacity evaluation of a flexible strip footing on a homogeneous deposit of clay. As a programming language, C++ is *** CO 2022 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Conference on Design, Manufacturing and Materials Engineering.

关键词： object-oriented programming Finite element analysis Modified cam clay Triaxial test OCC NCC

来源：评论

学校读者我要写书评

暂无评论

Range Space and Similarity Transformation Using Symbolic Mathematics in Python

引用

IEEE ACCESS 2024年 12卷 182788-182798页

作者： Wisassakwichai, Chainarong Phaochoo, Prasert Rajamangala Univ Technol Krungthep Fac Engn Div Elect Engn Bangkok 10120 Thailand Rajamangala Univ Technol Krungthep Fac Sci & Technol Div Math Bangkok 10120 Thailand

Linear systems involved in engineering and scientific calculations can be more easily analyzed using similarity transformation. However, understanding the numerous abstract linear algebra theorems associated with this transformation can be challenging. This paper proposes a systematic approach to organizing these theorems using SymPy, a symbolic mathematics library in Python, and develops an innovative Python module that leverages SymPy. It covers important theorems, including vector space basis, range space, null space, rank and nullity, eigenvalues, generalized eigenvectors, eigenspaces, and diagonal-Jordan canonical form transformations. These theorems are transformed into abstract data models and represented as programmatic objects using object-oriented programming to process input and output data. Two classes, 'rangeSpace' and 'similarTrnsfrm,' were created to handle computations related to range space and similarity transformation, respectively. The effectiveness of these classes has been validated through numerical results, which, when compared to MATLAB functions (null(), pinv(), sym(), and jordan()), demonstrate that the exact symbolic solutions from both classes significantly improve numerical precision for selected application examples from numerical algorithms, power systems and linear algebra. These classes have been uploaded to GitHub as open-source code, providing a versatile Python module that can be used for programming both offline on PCs and online through the web application "SymPy Live," producing satisfactory results even on mobile devices. This user-friendly module enables electrical engineering students and professionals to easily apply abstract linear algebra theorems to practical problems, facilitating computer-based solutions for linear systems that are consistent with analytical results.

关键词： Null space Vectors Eigenvalues and eigenfunctions Covariance matrices Python Mathematical models programming profession Principal component analysis Mobile handsets Linear systems Similarity transformation linear algebra symbolic mathematics SymPy object-oriented programming

来源：评论

学校读者我要写书评

暂无评论

The Energy Cost of the Visitor Pattern 39

The Energy Cost of the Visitor Pattern

引用

39th IEEE International Conference on Software Maintenance and Evolution (ICSME)

作者： Bree, Deaglan Connolly Cinneide, Mel O. Univ Coll Dublin Sch Comp Sci Dublin Ireland

ISBN: (数字)9781665479561

ISBN: (纸本)9781665479561

Design patterns are applied frequently during software evolution in order to make the software more flexible and amenable to extension. One little-studied aspect of design patterns is their propensity to increase run time energy consumption due to the indirection and additional structure they introduce. In this paper we study the impact of the Visitor pattern on energy efficiency. The Visitor pattern separates an algorithm from the objects it acts upon and improves maintainability by placing each algorithm within a single visitor class, at the cost of increased indirection due to the double dispatch required when the algorithm is invoked. We experimentally investigate the energy impact of varying the implementation of this pattern, and of removing the pattern entirely from the software. In our results we observe energy consumption reductions of greater than 7% in the textbook example when the pattern is implemented using reflective casting, and reductions of over 10% when experimenting with an open source project, JavaParser. The complete removal of the pattern yields more complex results, with little impact in the textbook example but reductions of over 7% in the JavaParser study. Our results highlight the energy savings that may be achieved when the Visitor pattern is removed, and show that energy savings may also be achieved by varying the implementation of the pattern.

关键词： Empirical Design Patterns Visitor Pattern Green Technology Energy Efficiency Refactoring Software Transformation Software Design object-oriented programming

来源：评论

学校读者我要写书评

暂无评论

Empirically Evaluating the Impact of object-Centric Breakpoints on the Debugging of object-oriented Programs

Proceedings of the ACM on Software Engineering

引用

Proceedings of the ACM on Software Engineering 2025年第FSE期2卷 914-935页

作者： Valentin Bourcier Pooja Rani Maximilian Ignacio Willembrinck Santander Alberto Bacchelli Steven Costiou University of Lille - Inria - CNRS - Centrale Lille - UMR 9189 CRIStAL F-59000 Lille France University of Zurich Zurich Switzerland

Debugging consists in understanding the behavior of a program to identify and correct its defects. Breakpoints are the most commonly used debugging tool and aim to facilitate the debugging process by allowing developers to interrupt a program’s execution at a source code location of their choice and inspect the state of the program. Researchers suggest that in systems developed using object-oriented programming (OOP), traditional breakpoints may be a not effective method for debugging. In OOP, developers create code in classes, which at runtime are instantiated as object—entities with their own state and behavior that can interact with one another. Traditional breakpoints are set within the class code, halting execution for every object that shares that class’s code. This leads to unnecessary interruptions for developers who are focused on monitoring the behavior of a specific object. As an answer to this challenge, researchers proposed object-centric debugging, an approach based on debugging tools that focus on objects rather than classes. In particular, using object-centric breakpoints, developers can select specific objects (rather than classes) for which the execution must be interrupted. Even though it seems reasonable that this approach may ease the debugging process by reducing the time and actions needed for debugging objects, no research has yet verified its actual impact. To investigate the impact of object-centric breakpoints on the debugging process, we devised and conducted a controlled experiment with 81 developers who spent an average of 1 hour and 30 minutes each on the study. The experiment required participants to complete two debugging tasks using debugging tools with vs. without object-centric breakpoints. We found no significant effect from the use of object-centric breakpoints on the number of actions required to debug or the effectiveness in understanding or fixing the bug. However, for one of the two tasks, we measured a statistically signifi

关键词： Breakpoints Controlled experiment Debugging Debugging tools Empirical evaluation object-centric breakpoints object-centric debugging object-oriented programming

来源：评论

学校读者我要写书评

暂无评论

SmarTS: A Java package for smart contract test suite generation and execution

引用

SOFTWAREX 2024年 26卷

作者： Gorski, Tomasz Univ Gdansk Inst Comp Sci Wita Stwosza 57 PL-80308 Gdansk Poland

Test suite reduction methods are a current research topic. In particular, continuous practices and regression testing demand minimizing the number of test cases. Recently, many smart contracts have been deployed in blockchain implementations. Due to their immutability, tests play an even more important role in smart contract development. The SmarTS package implements the k+1 test suite reduction method. The developed software generates and runs a minimal set of test cases for the smart contract. The layered construction of the package ensures the ability to test any smart contract whose implementation follows a specific design pattern.

关键词： Smart contract object-oriented programming Functional programming k+1 test pattern

来源：评论

学校读者我要写书评

暂无评论

Removing Decorator to Improve Energy Efficiency 29

Removing Decorator to Improve Energy Efficiency

引用

29th IEEE International Conference on Software Analysis, Evolution and Reengineering (SANER)

作者： Bree, Deaglan Connolly Cinneide, Mel O. Univ Coll Dublin Sch Comp Sci Dublin Ireland

ISBN: (纸本)9781665437868

With growing concerns regarding climate change and rising energy costs, there is an increased focus on improving the energy efficiency of software. One relevant avenue of research is the transformation of software designs in order to increase efficiency and reduce energy consumption. Design Patterns are of interest here as the indirection they introduce is likely to have a detrimental effect on energy consumption. In this paper we report on our investigations into the impact on energy consumption of the Decorator pattern, which is a structural design pattern used to enable additional behaviour to be attached to an individual component dynamically. Application of this pattern improves the maintainability of software at the cost of increased indirection and redundancy, which may reduce energy efficiency. In this paper we explore features of the Decorator pattern that impact on its systematic removal, with a future goal of removing this pattern using automated refactoring. We subsequently examine experimentally the Decorator pattern's impact on energy consumption in Java and find its implementation results in an increased number of instantiated objects and method invocations at run-time. The removal of the pattern can result in up to a 96% reduction in energy consumption in a best-case scenario with a textbook example, and up to a 5% reduction in energy consumption in an open-source project with a case study examining JUnit, a popular unit testing framework for Java. These results demonstrate the energy savings achievable with the removal of Decorator pattern instances and open the way for similar investigations of other design patterns.

关键词： Design Patterns Decorator Pattern Green Technology Energy Efficiency Refactoring Software Transformation Software Design object-oriented programming

来源：评论

学校读者我要写书评

暂无评论

Enhancing topology optimization with colored body-fitted mesh using adaptive filter, dual re-meshing strategy, and OOP programming paradigm

引用

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING 2024年 432卷

作者： Zhuang, Zicheng Liu, Tong Tong, Wei Xu, Fengming Weng, Yiwei Hong Kong Polytech Univ Dept Bldg & Real Estate Hong Kong Peoples R China

This study introduces a novel topology optimization approach by employing power law-based material interpolation and adaptive filtering in the framework of the unstructured grids. As an extension of the established Solid Isotropic Material with Penalization (SIMP) method that utilizes the fixed structured mesh, the proposed Colored Body-Fitted Optimization (CBFO) method adopts the body-fitted grids to enhance efficiency, accuracy, and adaptability for diverse engineering applications. Notably, incorporating body-fitted meshes with intermediate density profiles enables improved flexibility in the numerical simulations and eliminates the need for re-meshing in each iteration. The dual re-meshing strategy drastically reduces computational costs, with only two re-meshing procedures required throughout the optimization process. This approach facilitates the generation of dense mesh regions around critical boundaries to augment solution accuracy while enabling sparse mesh configurations in the low-sensitivity regions, thereby boosting computational efficiency without compromising performance. The effectiveness, robustness, and efficiency of the CBFO method are validated through testing on multiple standard minimum compliance and compliant mechanism problems. The proposed optimization method can converge in dozens of iterations, obtain better objective function values, and save computational costs by up to 69 % compared to the previous method using the body-fitted mesh. Additionally, a concise MATLAB script implementing the proposed method using an object-oriented programming (OOP) paradigm is provided in the appendix and the supplementary material, complete with annotations.

关键词： Topology optimization Colored body-fitted mesh Adaptive filter SIMP method object-oriented programming

来源：评论

学校读者我要写书评

暂无评论

Development of Fault Tree Analysis and Calculation Software Based on VC 13

Development of Fault Tree Analysis and Calculation Software ...

引用

13th International Conference on Graphics and Image Processing (ICGIP)

作者： Xiong Wei Wang, Teng Wang, Xu Ma, Jiajun Li, Guangjie Qiang, Zhan Wu, Dandan Zuo, Jiancun Shanghai Polytech Univ Coll Comp & Informat Engn Shanghai 201209 Peoples R China

ISBN: (数字)9781510650435

ISBN: (纸本)9781510650435;9781510650428

The fault tree(FT) analysis method plays an important role in system safety analysis and has been widely used in large and complex engineering systems. Therefore, this paper expounded the basic principles of FT analysis, using object-oriented programming technology, developed FT analysis and calculation software in the VC environment, and realized the drawing, qualitative and quantitative analysis of the FT. Finally, the effectiveness and usability of the software were verified according to the application analysis of an engineering example, and it has a certain engineering application value.

关键词： Fault tree analysis and calculation software development object-oriented programming VC

来源：评论

学校读者我要写书评

暂无评论

New Software-Based Readout Driver for the ATLAS Experiment

引用

IEEE TRANSACTIONS ON NUCLEAR SCIENCE 2021年第8期68卷 1811-1817页

作者： Kolos, Serguei Crone, Gordon Vazquez, William P. Univ Calif Irvine Dept Phys & Astron Irvine CA 92697 USA UCL Dept Phys & Astron London WC1E 6BT England Royal Holloway Univ London London TW20 0EX England

To maintain sensitivity to new physics in the coming years of Large Hadron Collider (LHC) operations, A Toroidal LHC ApparatuS (ATLAS) collaboration has been working on upgrading a portion of the front-end (FE) electronics and replacing some parts of the detector with new devices that can operate under the much harsher background conditions of future LHC runs. The legacy FE of the ATLAS detector sent data to the data acquisition (DAQ) system via the so-called Read Out Drivers (RODs) custom-made VMEbus boards devoted to data processing, configuration, and control. The data were then received by the Read Out System (ROS), which was responsible for buffering them during the High-Level Trigger (HLT) processing. From Run 3 onward, all new trigger and detector systems will be read out using new components, replacing the combination of the ROD and the ROS. This new path will feature an application called the Software Read Out Driver (SW ROD), which will run on a commodity server receiving FE data via the Front-End Link eXchange (FELIX) system. The SW ROD will perform event fragment building and buffering as well as serving the data on request to the HLT. The SW ROD application has been designed as a highly customizable high-performance framework providing support for detector-specific event building and data processing algorithms. The implementation that will be used for Run 3 of the LHC is capable of building event fragments at a rate of 100 kHz from an input stream consisting of up to 120 MHz of individual data packets. This document will cover the design and the implementation of the SW ROD application and will present the results of performance measurements executed on the server models selected to host SW ROD applications during Run 3.

关键词： Detectors Software Servers Protocols Large Hadron Collider Buildings Iron Data acquisition (DAQ) data collection data transfer object-oriented programming

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：