In this paper, the research progress of computer automatic classification technology and methods based on remote sensing images is introduced. Firstly, the traditional classification methods of remote sensing image ar...
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In this paper, the research progress of computer automatic classification technology and methods based on remote sensing images is introduced. Firstly, the traditional classification methods of remote sensing image are discussed, which include supervised classification and unsupervised classification. Finally, some new technologies and methods of remote sensing images classification at home and abroad.
Through testing the mountainous shallow-buried coal seam mining working face strata behaviors in Faer mine field, it got the strata behaviors: it was of large roof pressure, high rate of safety valve opening in hydrau...
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ISBN:
(纸本)9783037852828
Through testing the mountainous shallow-buried coal seam mining working face strata behaviors in Faer mine field, it got the strata behaviors: it was of large roof pressure, high rate of safety valve opening in hydraulic support, and even some supports crushed or took separation between top beams and tail beams. Traditional method of calculating supports' resistance can not be applied to mountainous shallow-buried coal seam mining working face. With the discrete element simulation software UDEC it analyzed the strata movement feature, and got that the overlying strata took collapse and horizontal displacement after mountainous shallow-buried coal seam mined, and the strata movement feature was different between reverse slope mining and positive slope mining.
Among a variety of composite services meeting functional demands, how to make optimization choice is a difficult problem faced by users whose QoS demand is a multidimensional objective, and QoS features are not interd...
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This paper presents an induction motor drive system with two distinct features: the inverse system theory and the dosed-loop controller. The speed of the induction motor is regulated using a PID controller, which does...
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This paper presents an induction motor drive system with two distinct features: the inverse system theory and the dosed-loop controller. The speed of the induction motor is regulated using a PID controller, which does not require rigorous tuning of the controller's parameters. The decoupling control is realized by newly proposed inverse system theory which is applied to decouple the torque and stator flux into two second-order subsystems. The paper analyzes the reversibility of induction motor mathematical model, in accordance with the definition of general nonlinear system relative order. The complete drive system is shown to have very good speed tracking performance, high robustness to stator resistance variation and full decoupling control, which has been a long-standing problem in the area of motor drives. Extensive simulations are presented for good dynamic performance evaluation and validation of the proposed control scheme.
This paper takes advantage of the integration of subtraction clustering and fuzzy c-means clustering algorithm to obtain precise number of clusters and the degree of membership, and establishes the neural network mode...
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This paper takes advantage of the integration of subtraction clustering and fuzzy c-means clustering algorithm to obtain precise number of clusters and the degree of membership, and establishes the neural network model based on the multiple criterion information fusion and the fuzzy technology. Collecting a variety of data in actual underground mining process and integrating them as a whole, the simulations are performed. Experimental results indicate that the proposed method is valid.
Internet flows characteristics are important reference for network behaviors research. However, there are few latest related studies and comparative analysis on different networks is especially rare. Based on traffic ...
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Internet flows characteristics are important reference for network behaviors research. However, there are few latest related studies and comparative analysis on different networks is especially rare. Based on traffic traces from CAIDA and CERNET, this paper presents a detailed and comprehensive comparison on Internet flows characteristics, including the fine-grained distributions of lifetime, size, rate, life stage, port and protocol of flows. Our comparative research and conclusion can provide a latest data support for other studies of network behaviors, traffic classification, network performance and network security etc.
Active appearance model (AAM) is a powerful method for objects feature localization and successfully used in computer vision. Although widely employed, AAMs suffer from a few drawbacks, such as accuracy on the contour...
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Recently, Cloud computing, as one of the hottest words in IT world, has drawn great attention. Many IT companies such as IBM, Google, Amazon, Microsoft, Yahoo and others vigorously develop cloud computing systems and ...
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Currently, incremental document clustering is one the most effective techniques to organize documents in an unsupervised manner for many Web applications. This paper summarizes the research actuality and new progress ...
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ISBN:
(纸本)9781457714146
Currently, incremental document clustering is one the most effective techniques to organize documents in an unsupervised manner for many Web applications. This paper summarizes the research actuality and new progress in incremental clustering algorithm in recent years. First, some representative algorithms are analyzed and generalized from such aspects as algorithm thinking, key technique, advantage and disadvantage. Secondly, we select four typical clustering algorithms and carry out simulation experiments to compare their clustering quality from both accuracy and efficiency. The work in this paper can give a valuable reference for incremental clustering research.
How to safeguard the quality of service (QoS) for users is an important issue in network computing task and resource reservation is one of the technologies. However, errors such as resource failure and reservation tim...
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