检索结果-内蒙古大学图书馆

CHILEAN Conference on Electrical, Electronics engineering, Information and Communication Technologies (CHILECON)

作者： Alana S. Magalhaes C. A. Leovir Calebe A. Matias Alan H. F. Silva Elder G. Domingues Aylton. J. Alves Wesley P. Calixto Program in Electronic Systems and Automation University of Brasilia (UnB) Brasília Brazil Experimental and Technological Research and Study Group (NExT) Federal Institute of Goias (IFG) Goiânia Brazil School of Electrical Mechanical and Computer Engineering Federal University of Gouias (UFG) Goiânia Brazil

ISBN: (纸本)9781467387576

This work proposes itself through mathematical modeling, simulating the electrical interactions between two electrical generators, an induction generator and a synchronous generator connected to a common bus in steady state, subject to non-linear load. By comparing the modeling of the two machines, we can see that the induction generator will present best way for the harmonic currents flowing in common bus. Experimental tests have confirmed the results of comparative modeling of the electric generators. It was evident that the induction generator, in addition to increasing the active power to the electrical system, could reduce current harmonics components present at the connection point improving the voltage profile in the network.

关键词： Induction generators Harmonic analysis Synchronous generators Power system harmonics Reactive power

来源：评论

学校读者我要写书评

暂无评论

EGI/IMU Integration Using Multiple IMUs and Error Damping Loop for SAR Motion Compensation

EGI/IMU Integration Using Multiple IMUs and Error Damping Lo...

引用

International Conference on Control, Automation and systems

作者： Jin Woo Song Chul Woo Kang Young Bum Park Yong Gon Jong Park Chan Gook Park BK21 Plus Transformative Training Program for Creative Mechanical and Aerospace Engineers Department of Mechanical and Aerospace Engineering Seoul National University Automations and Systems Research Institute Department of Mechanical and Aerospace Engineering Seoul National University Department of Mechanical and Aerospace Engineering/ASRI Seoul National University

ISBN: (纸本)9781479999767

We propose an EGI/IMU integrated smoothing algorithm based on extended Kalman filter (EKF) for synthetic aperture radar (SAR) motion compensation. Conventional navigation algorithms have discontinuities intrinsically which are caused by the measurement update done by the Kalman filter. The discontinuities are as harmful to the SAR image quality significantly as the relative position error. In order to eliminate discontinuities and to reduce relative position error, an additional inertial measurement unit (IMU) is used with master embedded GNSS inertial navigation system (EGI). The additional IMU contributes to smoother output and navigation accuracy. The error correction by EKF is performed gradually between measurement updates, which significantly improves the smoothing performance. Through Monte-Carlo simulation, the performance improvements in relative accuracy and continuity are confirmed.

关键词： Smoothing algorithm SAR motion compensation EGI Extended Kalman filter

来源：评论

学校读者我要写书评

暂无评论

Towards autonomous navigation of unsignalized intersections under uncertainty of human driver intent

Towards autonomous navigation of unsignalized intersections ...

引用

IEEE/RSJ International Conference on Intelligent Robots and systems

作者： V. Sezer T. Bandyopadhyay D. Rus E. Frazzoli D. Hsu Department of Mechanical Engineering Istanbul Technical University Istanbul Turkey Tirthankar Bandyopadhyay is with Autonomous Systems Program Commonwealth Scientific and Industrial Research Organization Australia Daniela Rus and Emilio Frazzoli are with the Department of Electri-cal&Engineering and Aeronautics&Astronautic respectively Massachusetts Institute of Technology USA Department of Computer Science National University of Singapore Singapore

In a mixed environment of autonomous driverless vehicles and human driven vehicles operating on the same road, identifying intentions of human drivers and interacting with them in a compliant and responsible manner becomes a challenging problem for the driverless vehicles. In this paper, the problem of vehicle interaction at an intersection merging scenario is formulated as an Intention-Aware motion planning problem using the tools from Mixed Observability Markov Decision Process (MOMDP). We utilize the tools from recent intention aware planning framework to demonstrate a merging behavior in the presence of human drivers by trying to infer and act according to the intentions of the human drivers. A driver behavior model for T-junction intersections is developed in order to calculate the probabilistic state transition functions of the MOMDP model. With proposed solution, it is demonstrated that using intention aware planning improves performance in comparison to present time to merge approach by lowering accident probability and intersection navigation duration. The proposed method is tested on a real autonomous vehicle (AV) in the presence of human driven vehicles to validate our approach.

关键词： Vehicles Navigation Mobile robots Roads Hidden Markov models Uncertainty

来源：评论

学校读者我要写书评

暂无评论

Finite Capacity Scheduling of Make-Pack Production: Case Study of Adhesive Factory

引用

Journal of engineering, Project, and Production Management 2014年第2期4卷 114-123页

作者： Theppakarn Chotpradit Pisal Yenradee Logistics and Supply Chain Systems Engineering Program School of Manufacturing Systems and Mechanical Engineering Sirindhorn International Institute of Technology Thammasat University Logistics and Supply Chain Systems Engineering Program School of M

This paper developed a Finite Capacity Scheduling (FCS) system for make-pack production based on a real case of an adhesive factory. The FCS determines production quantity of each machine to conform with resource capacities and due date of customer orders while minimizes related total cost. The total cost includes total production, inventory, and cleaning cost. A Mixed Integer Linear programming (MILP) model is formulated and solved by LINGO software. The computational time is very long since the model has a lot of integer variables. Thus, the model is solved for a reasonable time and the best but not optimal solution is reported with the lower bound. This paper tries fixed horizon and rolling horizon scheduling methods. The fixed horizon plans for an entire horizon of 30 days. The rolling horizon plans for a sub-horizon of 10, 15, and 17 days. An overlapping of sub-horizons is applied to reduce end-of-horizon effect. Three scenarios (high, normal, and low) of demands are considered. The fixed horizon method is applied first to all scenarios of demand. If the best solution is far away from the lower bound, the rolling horizon method is applied. The results indicated that the rolling horizon method may significantly reduce the total cost with the same computational time. Moreover, the rolling horizon method is more applicable for a dynamic situation where customers frequently change orders. The proposed MILP model can generate reasonable solutions and they are useful for scheduling decision of make- pack production.

关键词： Make-pack FCS finite capacity scheduling MILP rolling horizon scheduling optimization

来源：评论

学校读者我要写书评

暂无评论

Cyclic strain resistance, stress response, fatigue life, and fracture behavior of high strength low alloy steel 300 M

Cyclic strain resistance, stress response, fatigue life, and...

引用

作者： Manigandan, K. Srivatsan, T.S. Tammana, Deepthi Poorgangi, Behrang Vasudevan, Vijay K. Department of Mechanical Engineering University of Akron Akron OH 44325-3903 United States School of Dynamic Systems Materials Science and Engineering Program University of Cincinnati Cincinnati OH 45221-0072 United States

The focus of this technical manuscript is a record of the specific role of microstructure and test specimen orientation on cyclic stress response, cyclic strain resistance, and cyclic stress versus strain response, deformation and fracture behavior of alloy steel 300 M. The cyclic strain amplitude-controlled fatigue properties of this ultra-high strength alloy steel revealed a linear trend for the variation of log elastic strain amplitude with log reversals-to-failure, and log plastic strain amplitude with log reversals-to-failure for both longitudinal and transverse orientations. Test specimens of the longitudinal orientation showed only a marginal improvement over the transverse orientation at equivalent values of plastic strain amplitude. Cyclic stress response revealed a combination of initial hardening for the first few cycles followed by gradual softening for a large portion of fatigue life before culminating in rapid softening prior to catastrophic failure by fracture. Fracture characteristics of test specimens of this alloy steel were different at both the macroscopic and fine microscopic levels over the entire range of cyclic strain amplitudes examined. Both macroscopic and fine microscopic observations revealed fracture to be a combination of both brittle and ductile mechanisms. The underlying mechanisms governing stress response, deformation characteristics, fatigue life, and final fracture behavior are presented and discussed in light of the competing and mutually interactive influences of test specimen orientation, intrinsic microstructural effects, deformation characteristics of the microstructural constituents, cyclic strain amplitude, and response stress. © 2014 ASM International.

关键词： Microstructure

来源：评论

学校读者我要写书评

暂无评论

A modified gravitational search algorithm for continuous optimization 14

A modified gravitational search algorithm for continuous opt...

引用

16th Genetic and Evolutionary Computation Conference Companion, GECCO 2014 Companion

作者： De, Emerson Hochsteiner Segundo, Vasconcelos Neto, Gabriel Fiori Da Silva, Andre Mendes Mariani, Viviana Cocco Dos Santos Coelho, Leandro Mechanical Eng. Grad. Program Pontifical Catholic University of Parana Curitiba PR Brazil Curitiba PR Brazil Mechatronics Engineering Undergraduate Program Pontifical Catholic University of Parana Curitiba PR Brazil Mechanical Engineering Graduate Program Pontifical Catholic University of Parana and Electrical Engineering Federal University of Parana Curitiba PR Brazil Industrial and Systems Eng. Graduate Program Pontifical Catholic University of Parana and Electrical Engineering Federal University of Parana Curitiba PR Brazil

ISBN: (纸本)9781450328814

The gravitational search algorithm (GSA) is a stochastic population-based metaheuristic inspired by the interaction of masses via Newtonian gravity law. In this paper, we propose a modified GSA (MGSA) based on logarithm and Gaussian signals for enhancing the performance of standard GSA. To evaluate the performance of the proposed MGSA, well-known benchmark functions in the literature are optimized using the proposed MGSA, and provides comparisons with the standard GSA.

关键词： Optimization

来源：评论

学校读者我要写书评

暂无评论

Erratum to: Influence of Cyclic Straining on Fatigue, Deformation, and Fracture Behavior of High-Strength Alloy Steel

引用

Journal of Materials engineering and Performance 2015年第1期25卷 151-151页

作者： K. Manigandan T. S. Srivatsan V. K. Vasudevan D. Tammana B. Poorganji Department of Mechanical Engineering The University of Akron Akron USA School of Dynamic Systems Materials Science and Engineering Program University of Cincinnati Cincinnati USA

来源：评论

学校读者我要写书评

暂无评论

Cyclic strain resistance, deformation and fracture behavior of a novel alloy steel 3

Cyclic strain resistance, deformation and fracture behavior ...

引用

3rd Biennial Symposium on Fatigue of Materials: Advances and Emergences in Understanding, held during Materials Science and Technology 2014, MS and T 2014

作者： Manigandan, K. Srivatsan, T.S. Vasudevan, V.K. Tammana, D. Poorbangi, B. Division of Materials Science and Engineering Department of Mechanical Engineering University of Akron AkronOH44325-3903 United States School of Dynamic Systems Materials Science and Engineering Program University of Cincinnati CincinnatiOH45221-0072 United States

ISBN: (纸本)9781119041481

In this paper, the results of a study on microstructural influences on cyclic strain response, deformation and fracture behavior of an alloy steel is presented Cyclic strain resistance exhibited a linear trend for the variation of both elastic strain amplitude with reversals-to-failure, and plastic strain amplitude with reversals-to-failure. Fracture morphology was observed to be the same at the macroscopic level over the entire range of cyclic strain amplitudes examined. However, at the fine microscopic level this alloy steel revealed fracture to be mixed-mode with features reminiscent of "locally" ductile and brittle failure mechanisms. The mechanisms governing strain response at the fine microscopic level, resultant fatigue life, and final fracture behavior are presented and discussed in light of the mutually interactive influences of intrinsic microstructural effects, deformation characteristics of the microstructural constituents during fully-reversed strain cycling, magnitude of cyclic strain amplitude, and resultant fatigue life.

关键词： Alloy steel

来源：评论

学校读者我要写书评

暂无评论

Integrating artificial neural networks and cluster analysis to assess energy efficiency of buildings

Integrating artificial neural networks and cluster analysis ...

引用

IIE Annual Conference and Expo 2014

作者： Aqlan, Faisal Ahmed, Abdulaziz Srihari, Krishnaswami Khasawneh, Mohammad T. Industrial and System Engineering Program Department of Mechanical Civil and Environmental Engineering University of New Haven West HavenCT06516 United States Department of Systems Science and Industrial Engineering State University of New York at Binghamton BinghamtonNY13902 United States

ISBN: (纸本)9780983762430

Energy consumption of buildings worldwide has steadily increased over the past couple of decades. Furthermore, energy performance of buildings is one of the factors that contribute to energy waste and its perennial adverse impact on the environment. This paper presents a data mining approach for assessing the heating and cooling requirements of residential buildings. The proposed approach combines Artificial Neural Networks (ANNs) and cluster analysis to assess and predict the heating and cooling energy efficiency of residential buildings. The ANN-based model uses eight input variables (i.e., relative compactness, surface area, wall area, roof area, overall height, orientation, glazing area, and glazing area distribution) to predict both the heating and cooling loads of residential buildings. Buildings are then clustered based on the output variables using the K-means clustering method. The proposed approach is used to assess and evaluate 768 diverse residential buildings based on simulated literature data. The research results showed that the proposed approach can effectively predict the heating and cooling requirements of residential buildings based on the input variables considered with a very high level of accuracy.

关键词： Energy efficiency

来源：评论

学校读者我要写书评

暂无评论

Experimental Study on Mechanisms of Buckling and Kink-band Formation in Graphene Nanosheets

Experimental Study on Mechanisms of Buckling and Kink-band F...

引用

2014 2nd International Conference on Materials Science,Machinery and Energy engineering(MSMEE 2014)

作者： C.C.Wen T.W.Chang W.S.Kuo Ph.D.Program in Mechanical and Aeronautical Engineering Feng-Chia University Department of Aerospace and Systems Engineering Feng-Chia University

This work examines buckling and kink-band formation in graphene nanosheets(GNSs).GNSs are nano-scale flakes composed of graphene *** graphite was first made, which can be torn apart into GNSs by sonication.A simple but effective approach was adopted to incur buckling in *** observations revealed three major modes: the kinking induced by bending, the bulging, and the kink-band caused by in-plane *** conditions to cause these modes are *** buckled, the graphene layers undergo sharp ***, the graphene layers can survive kinking without fracture due to their exceptional *** kink-band in GNSs resembles the kink-band in carbon-fiber ***, the scale, the material properties, the micro-structures, and the energy terms involved in forming the kink-band are different.

关键词： Nanosheets(GNSs) Buckling Kink-band

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：