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检索条件"任意字段=2011 3rd International Conference on Computer Research and Development, ICCRD 2011"

共 2807 条记录，以下是261-270 订阅

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Symbolic State-Space Exploration and Guard Generation in Supervisory Control Theory

Symbolic State-Space Exploration and Guard Generation in Sup...

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3rd international conference on Agents and Artificial Intelligence, ICAART 2011

作者： Fei, Zhennan Miremadi, Sajed Åkesson, Knut Lennartson, Bengt Automation Research Group Department of Signals and Systems Chalmers University of Technology Göteborg Sweden

ISBN: (纸本)9783642299650

Supervisory Control Theory (SCT) is a model-based framework for automatically synthesizing a supervisor that minimally restricts the behavior of a plant such that given specifications is fulfilled. The main obstacle which prevents SCT from having a major industrial breakthrough is that the supervisory synthesis, consisting of a series of reachability tasks, suffers from the state-space explosion problem. To alleviate this problem, a well-known strategy is to represent and explore the state-space symbolically by using Binary Decision Diagrams. Based on this principle, an alternative symbolic state-space traversal approach, depending on the disjunctive partitioning technique, is presented in this paper. In addition, the approach is adapted to the prior work, the guard generation procedure, to extract compact propositional formulae from a symbolically represented supervisor. These propositional formulae, referred to as guards, are then attached to the original model, resulting in a modular and comprehensible representation of the supervisor. © Springer-Verlag Berlin Heidelberg 2013.

关键词： Binary decision diagrams

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Experimental research on flexural mechanical behavior of fiber reinforced concrete flexural members

Experimental research on flexural mechanical behavior of fib...

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3rd international conference on Engineering Materials, Energy, Management and Control (MEMC2013)

作者： Wang, Xiaochu Zhang, Jianpeng Liu, Hongtao Key Lab Geoenvironm Engn Shenyang 110044 Liaoning Peoples R China Shenyang Univ Shenyang 110044 Peoples R China

ISBN: (纸本)9783037856147

Based on the cross-section bending of 5 carbon fiber concrete beams, the mechanism of deflection and strain of carbon fiber concrete beam were studied considering the variation of the length of carbon fiber and stirrup ratio. The experimental results show that the deflection of destruction increased with the increase of the length of the carbon fiber, and the effect of stirrup ratio on deflection and strain of beams is not obvious. The carbon fiber can effectively improve the brittle failure of concrete beam, and the stain of concrete accorded with that steel bar at the same height. According to the existing test model, the theoretical calculating formula of CFRC was proposed and applied for the cracking load calculation expression of CRFC beams, and theoretical calculated results agree well with experimental results.

关键词： CFRC deflection strain failure mode tensile strength cracking load

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research of the Dynamic Compaction Effective Reinforcement Depth of Cohesionless Soil

Research of the Dynamic Compaction Effective Reinforcement D...

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3rd international conference on Civil Engineering, Architecture and Building Materials (CEABM 2013)

作者： Song, Xiuguang Yang, Yang Wu, Qingdong Zhou, Zhidong Shandong Univ Sch Civil Engn Jinan 250061 Peoples R China

ISBN: (纸本)9783037857755

The effective reinforcement depth is one of the most important parameters of dynamic compaction method design and construction, so far it is still lack of in-depth theoretical study. In this paper, combined with the field test, FLAC3D was used to do the numerical simulation of dynamic compaction reinforcement to cohesionless soil. By the simulation, this paper analyzed the factors which may influence the effective reinforcement depth, such as the hammer's weight, drop distance, base area, and the soil parameters. The orthogonal design method was used to analyze the soil parameters' sensitivity to the effective reinforcement depth. Combined with the results of numerical analysis and the traditional empirical formulae, the effective reinforcement depth calculation formula was established for cohesionless soil. Engineering verification shows that, the results estimated by the formula is reliable, and can provide certain reference for the future engineering.

关键词： dynamic compaction effective reinforcement depth numerical simulation cohesionless soil field test

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research on Seismic Response Estimation of Reinforced Concrete Pier under Pulse-type Near-fault Ground Motion

Research on Seismic Response Estimation of Reinforced Concre...

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3rd international conference on Civil Engineering, Architecture and Building Materials (CEABM 2013)

作者： Shen Yanli Du Xiuli Yang Qingshan Beijing Univ Technol Coll Civil Engn Beijing 100044 Peoples R China Beijing Jiaotong Univ Sch Civil Engn & Architecture Beijing 100044 Peoples R China

ISBN: (纸本)9783037857755

For estimating seismic response of pier-structure under near-fault ground motion, The typical pulse-type near-fault ground motion records were chosen to establish a record base, and three pier models with different natural period were established;The non-elastic response spectral displacement of ground motion was used to estimate the nonlinear response;The yield displacement of the nonlinear oscillator was defined based on the static pushover analysis result, and its influence on response estimation was studied. The study result is important for structural seismic response estimation by using the non-elastic response spectral displacement and the probability-based seismic performance evaluation.

关键词： pier pulse-type near-fault ground motion non-elastic displacement response spectrum displacement seismic response estimation

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ARX model identification of Shui-Kou concrete gravity dam based on seismic response data

ARX model identification of Shui-Kou concrete gravity dam ba...

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3rd international conference on Civil Engineering, Architecture and Building Materials (CEABM 2013)

作者： Qiao, Wen Liu, Guoming He, Jinwen Fuzhou Univ Sch Civil Engn 2 Xue Yuan Rd Fuzhou 350108 Fujian Peoples R China Hohai Univ Sch Water Conservacy & Hydropower Nanjing 210098 Jiangsu Peoples R China

ISBN: (纸本)9783037857755

research on the dynamic characteristics of gravity dam was carried out by adopting ARX model using the seismic response data of concrete gravity dam at Shui-Kou hydropower station. The applicability and effectiveness of single-Output-multiple-input ARX model were deduced and verified. A corresponding computer program was developed, and performed to identify the modal parameters of the system. The identified natural frequencies and damping ratios were basically same with the results by traditional peak point pick-up method, and also close to the finite element method (FEM) results. It is indicated that the structure natural frequencies and damping ratios are determined by the characteristics of the structure, the dynamic characteristics identified by ARX model are correct, and ARX model can avoid frequency leakiness when smoothing processing and Fourier transform are conducted in solving process of the peak point pick-up method. The modal identification can be applied to other structures.

关键词： Hydraulic structure Modal parameters Modal identification Shui-Kou concrete gravity dam ARX model Seismic response data

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An Exploration of Sustainable development of Indemnificatory Housing based on the Idea of Mixed Housing

An Exploration of Sustainable Development of Indemnificatory...

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3rd international conference on Civil Engineering, Architecture and Building Materials (CEABM 2013)

作者： Hou, X. C. Zhang, J. Y. Fu, M. Xu, Y. T. Huaqiao Univ Coll Civil Engn Xiamen 361021 Fujian Peoples R China Univ Toronto Dept Civil Engn Toronto ON M5S 1A4 Canada Huaqiao Univ Fujian 362021 Peoples R China Xiamen Univ Technol Fujian 362021 Peoples R China

ISBN: (纸本)9783037857762

This study focuses on finding the means for the harmonious and sustainable development of the people, resources, and environment of indemnificatory housing areas, as well as the prevention of the concomitants occurred in precedent countries, for example environmental deterioration, polarization between rich and poor, and social instability. It is elucidated in this paper that the government should provide residents of indemnificatory housing areas with diverse and humanized basic housing conditions and management services under the guidance of the idea of mixed housing, while follow the principles of open structure, elaborate design, shared facilities, environment friendly, and cooperative management. In addition, in this paper we demonstrated with practical examples that "Harmonious Housing Mode" is a sustainable development mode for indemnificatory housing.

关键词： Mixed housing Indemnificatory housing Sustainable development

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development of Work Concept Implementation And Quality Improvement Practice Evaluation: UKM Case Study

Development of Work Concept Implementation And Quality Impro...

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The 3rd international conference on Emerging Trends in computer and Image Processing(ICETCIP’2013);The 3rd international conference on Advancements in Electronics and Power Engineering(ICAEPE’2013);The 3rd international conference on Trends in Mechanical and Industrial Engineering(ICTMIE’2013);The 3rd international conference on Advances in Biotechnology and Pharmaceutical Sciences(ICABPS’2013);The 3rd international conference on Chemical,Biological and Environment Sciences(ICCEBS’2013);The 3rd international conference on Management,Economics and Social Sciences(ICMESS’2013)

作者： Mohd Saiful.Mohamed Mohd Nizam.Ab Rahman Dzuraidah. Abdul Wahab the National University of Malaysia

Globalization has made the competition stiffer for every sector in Malaysia including the higher educational sector. Hence, quality improvement practices will be important for the higher education institution to remain competitive. The first objective of this study is to identify the importance and barriers of quality improvement practices in Malaysia's higher educational sector in the scope of training given to the student. Secondly, this study will also suggest the success factors for quality improvement practices in the same scope. The methods used to conduct the study are case study method and survey method. A questionnaire is given randomly to 30 students that had undergone the training provided by the National University of Malaysia (UKM). The study found that the student perceive the training quality as quite satisfactory. It is also found out that the five aspects of quality, which are the quality of process, quality of object, quality of atmosphere, quality of interaction and quality of infrastructure have high correlation between one another. The problems faced by the student during the training are unfriendly trainer or facilitator, incomplete facilities and that the training activities are sometimes boring. To address these issues, the trainer themselves have to be well-trained before they can teach. Besides, they should also have high commitment towards the quality improvement practices. Preventive maintenances should be conducted regularly to ensure that all the infrastructures are in functional condition. Finally, it is suggested that part of the training should be done online for easy access.

关键词： Quality improvement, higher education institution, case study, survey, questionnaire.

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Effect of microstructure on magnetic properties of Nd-Fe-B permanent magnet

Effect of microstructure on magnetic properties of Nd-Fe-B p...

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3rd international conference on Chemical Engineering and Advanced Materials (CEAM 2013)

作者： Qian, KunMing Hao, Jie Ji, Song Zhang, YanSong Ding, Ang Li, MingLi Huang, JingHui Yan, Mi China Acad Ordnance Sci Ningbo Branch 199 Lingyun Rd Ningbo 315103 Zhejiang Peoples R China Zhejiang Univ Dept Mat Sci & Engn State Key Lab Silicon Mat Hangzhou 310027 Peoples R China

ISBN: (纸本)9783037858141

The new Nd-Fe-B magnets were prepared by powder metallurgical processing. The thermal stability and magnetic properties were found to be remarkably improved after annealing at 680 degrees C for 2 h. The B-r, and H-c, BH of annealed magnets were improved by -0.04 T, 132 KA.m(-1), 22 KJ.m(-3), from 1.25 T, 882 KA-m(-1), 286 KJ.m(-3) of the as-sintered magnets, respectively. The losses and average temperature coefficients of magnetic properties were very low at 373 K. Compare with the as-sintered magnets, the magnetic property losses of the annealed magnets decreased by half at different temperature. Scanning electron microscopy on magnets did reveal a noticeable difference in phase-morphology, and found that the improvements of thermal stability and magnetic properties can be attributed to the change of magnetic domain wall motion, composition, stray demagnetizing fields, and microstructure. The new Nd-Fe-B preferment magnets are promising to use in the all-electric bus hub direct drive motor.

关键词： Permanent magnets Nd-Fe-B magnets Thermal stability Polarization losses Rare earths

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3rd international Joint conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management, IC3K 2011

3rd International Joint Conference on Knowledge Discovery, K...

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ISBN: (纸本)9783642371851

The proceedings contain 30 papers. The special focus in this conference is on Knowledge Discovery and Information Retrieval, Knowledge Engineering and Ontology development and Knowledge Management and Information Sharing. The topics include: Mining graphs of prescribed connectivity;an explorative study of proximity measures;comparing the macroeconomic responses of US and Japan through time series segmentation;a block coclustering model for pattern discovering in users' preference data;improving text retrieval accuracy by using a minimal relevance feedback;using distant supervision for extracting relations on a large scale;a fast method for web template extraction via a multi-sequence alignment approach;unsupervised terminology graph extraction and decomposition;learning to classify text using a few labeled examples;a system to support legal case building and reasoning;different approaches to build brief ontologies;ontology engineering for the autonomous systems domain;cloud services composition support by using semantic annotation and linked data;identifying services from a service provider and customer perspectives;code quality cultivation;misbehavior discovery through unified software-knowledge models;an universal indexing system approach;determining the collaboration maturity of organizational teams;assessing the impact of in-government cooperation dynamics and discovering the relevance of external context to business processes.

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The implementation of trajectory planning in real DEM maps based on MILP

The implementation of trajectory planning in real DEM maps b...

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3rd IFAC conference on Intelligent Control and Automation Science, ICONS 2013

作者： Tang, L.W. Wang, G. School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China School of Electronic Engineering University of Electronic Science and Technology of China Chengdu 611731 China

ISBN: (纸本)9783902823458

This paper utilizes the path planning algorithm based on mixed integer linear programming (MILP) to plan trajectory in the real Digital Elevation Model (DEM) map. The original map data is derived from international Science Data Services Platform (ISDSP). We analyzed and extracted the original map data from ISDSP. Then we converted it into ASCII encoding DEM grid map, and used c++ and opengl to display the map after interpretating the format of the data structure. Finally, path planning algorithm is applied to the map. Simulation results show the feasibility and correctness of the algorithm in real DEM map. Copyright © 2013 IFAC.

关键词： Application programming interfaces (API)

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