This paper discusses a problem appeared by drill bit bending during bone drilling in the orthopedic surgery, where precision is needed for screws to be implanted. The bone surface has a specific shape and the drill bi...
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The paper presents a case report of the therapy by neurofeedback training of a chronic female schizophrenia outpatient. The purpose of the neurofeedback training was to enhance cognition, memory and behavioral perform...
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The bivariate copula potentiality for measuring risk dependencies due to occurrence of two natural disasters is *** bivariate copula essentials are *** copula dependence measures(concordance,Kendall's tau,Spearman...
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The bivariate copula potentiality for measuring risk dependencies due to occurrence of two natural disasters is *** bivariate copula essentials are *** copula dependence measures(concordance,Kendall's tau,Spearman's rho,positively quadrant dependent,tail dependence)are *** results about the measuring risk dependencies can support the stakeholders to take more informed decisions regarding the efficient allocation of the available funding for the improvement of risk management with respect to natural disasters.A concept for implementing the bivariate copula models as a part of a Web integrated information system for risk management of natural disasters is outlined.
In this article, we address the pose estimation for planar motion under the framework of generalized camera models. We assume the knowledge of the coordinates of 3D straight lines in the world coordinate system. Pose ...
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ISBN:
(纸本)9781479969357
In this article, we address the pose estimation for planar motion under the framework of generalized camera models. We assume the knowledge of the coordinates of 3D straight lines in the world coordinate system. Pose is estimated using the images of the 3D lines. This approach does not require the determination of correspondences between pixels and 3D world points. Instead, and for each pixel, it is only required that we determine to which 3D line it is associated with. Instead of identifying individual pixels, it is only necessary to establish correspondences between the pixels that belong to the images of the 3D lines, and the 3D lines. Moreover and using the assumption that the motion is planar, this paper presents a novel method for the computation of the pose using general imaging devices and assuming the knowledge of the coordinates of 3D straight lines. The approach is evaluated and validated using both synthetic data and real images. The experiments are performed using a mobile robot equipped with a non-central camera.
Simulation is a reasonable approach and important basis for studies and trainings of astronauts' multimodule space station intra-vehicular navigation. Based on the introduction of the main simulation effect requir...
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Simulation is a reasonable approach and important basis for studies and trainings of astronauts' multimodule space station intra-vehicular navigation. Based on the introduction of the main simulation effect required, the research progress of multimodule space station intra-vehicular navigation simulation was summarized and analyzed from three aspects: limitations of traditional intra-vehicular activity(IVA) simulation methods, development of virtual reality(VR)-based multimodule space station intra-vehicular navigation simulation, and shortcomings existing in the VR-based simulation methods. Research production and deficiency in areas of the obligatory and/or automatic spatial updating verification and the effect of subjects' posture on the navigation simulation were studied emphatically. At last, the research directions in future were pointed out.
In this paper, we would present the structure of the teleoperation system of the Tiangong-2 Space Manipulator system. The system consist of on-orbit teleoperation and on-ground skill learning subsystem, and they meet ...
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ISBN:
(纸本)9781665405362
In this paper, we would present the structure of the teleoperation system of the Tiangong-2 Space Manipulator system. The system consist of on-orbit teleoperation and on-ground skill learning subsystem, and they meet the requirements of different tasks. Then, we also represented the key technology, the calibration method of the CyberGlve, of the two subsystem. And the experiments showed the methods are effective.
The flight control problem of UAV is a relatively complex problem because of its large state space and the complex dynamics model, and it requires real-time control in the flight process. But the traditional control m...
The flight control problem of UAV is a relatively complex problem because of its large state space and the complex dynamics model, and it requires real-time control in the flight process. But the traditional control method can not meet the requirements. A good solution is to use the deep reinforcement learning method based on neural network for training, which can use the powerful nonlinear fitting ability of neural network to learn a better strategy. However, this model-free reinforcement learning method needs to explore a very large state action space, leading to low learning efficiency. In this paper, a method is proposed to train neural network policy by using bidirectional guided policy search under the framework of guided policy search (GPS). Specifically, least squares method is used to estimate the local time-varying linear model, and then the model-based optimal control method is used to improve the local policy. Global neural network is guided to search policy parameters by local policy in a manner of supervised training. The initial nominal trajectory required by the optimal control algorithm can be generated by neural network because of its generalized reasoning ability. This bidirectional guided policy search algorithm can improve the results of both the optimal control algorithm and the neural network policy in an iterative manner. Finally, our neural network strategy is tested in the simulation environment, which can realize the maneuvering control of UAV in any state. On this basis, it will also be conducive to the training of higher-level and more complex flight strategies.
The paper attempts to summarize the latest and future trends in the development of knowledge management particularly in the Enterprise 2.0 technology. A short description of the technology and its features are given. ...
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The paper attempts to summarize the latest and future trends in the development of knowledge management particularly in the Enterprise 2.0 technology. A short description of the technology and its features are given. The classical definition of knowledge management is presented which is further related with its position in the area of Enterprise 2.0. The observed current problems in knowledge management are discussed. Several major trends have been identified and analyzed regarding the knowledge management transformation of into social business. The use of the Cloud Computing technology as a natural extension of the development of the Enterprise 2.0 knowledge management is proposed.
Relative 6 DOF pose transformation is necessary for registering two RGB-D images. Although the Iterative Closest Point (ICP) algorithm has been widely used to solve the relative pose, it would be enhanced significantl...
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