Communication Based Train control(CBTC)system is a kind of advanced train automatic controlsystem that integrates radio communication and automation control *** happens frequently in CBTC train ground communication s...
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Communication Based Train control(CBTC)system is a kind of advanced train automatic controlsystem that integrates radio communication and automation control *** happens frequently in CBTC train ground communication system,which may result in communication interrupt and long *** this paper,we propose a new handoff decision algorithm based on improved Grey Verhulst model for the Time Division-Long Term Evolution(TD-LTE)based train-ground communication *** proposed handoff decision algorithm can be used under free space and leaky coaxial cable equipped *** Grey Verhulst model is used to predict the Reference Signal Receiving Power(RSRP)values from two Radio Remote Units(RRU).Compared with traditional Verhulst model,improved Grey Verhulst model can optimize parameters to eliminate the inherent errors in data sequence *** handoff decision action is performed based on the predicted RSRP *** results show that the proposed handoff decision algorithm can decrease pingpong handoff and improve the handoff delay compared with the traditional A3 event based scheme in LTE systems.
Quantum ensemble classification has significant applications in discrimination of atoms (or molecules), separation of isotopic molecules and quantum information extraction. In this paper, we recast quantum ensemble cl...
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ISBN:
(纸本)9781479914821
Quantum ensemble classification has significant applications in discrimination of atoms (or molecules), separation of isotopic molecules and quantum information extraction. In this paper, we recast quantum ensemble classification as a supervised quantum learning problem. A systematic classification methodology is presented by using a sampling-based learning control (SLC) approach for quantum discrimination. The classification task is accomplished via simultaneously steering members belonging to different classes to their corresponding target states (e.g., mutually orthogonal states). Numerical results demonstrate the effectiveness of the proposed approach for the discrimination of two quantum systems and the binary classification of two-level quantum ensembles.
Communication Based Train control (CBTC) system is a kind of advanced train automatic controlsystem that integrates radio communication and automation control technology. Handoff happens frequently in CBTC train grou...
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ISBN:
(纸本)9781479960798
Communication Based Train control (CBTC) system is a kind of advanced train automatic controlsystem that integrates radio communication and automation control technology. Handoff happens frequently in CBTC train ground communication system, which may result in communication interrupt and long latency. In this paper, we propose a new handoff decision algorithm based on improved Grey Verhulst model for the Time Division-Long Term Evolution (TD-LTE) based train-ground communication system. The proposed handoff decision algorithm can be used under free space and leaky coaxial cable equipped environment. Improved Grey Verhulst model is used to predict the Reference Signal Receiving Power (RSRP) values from two Radio Remote Units (RRU). Compared with traditional Verhulst model, improved Grey Verhulst model can optimize parameters to eliminate the inherent errors in data sequence prediction. The handoff decision action is performed based on the predicted RSRP values. Simulation results show that the proposed handoff decision algorithm can decrease ping-pong handoff and improve the handoff delay compared with the traditional A3 event based scheme in LTE systems.
Detecting contradictive texts is a crucial and fundamental work for text understanding just like textual entailment. Textual contradiction occurs when two different texts cannot both be true at the same time. This pap...
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Visual saliency is an important cue in human visual system, it can identify salient region in image. Image contrast has been utilized as an effective feature to detect the salient region. The conventional contrast mea...
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ISBN:
(纸本)9781479943104
Visual saliency is an important cue in human visual system, it can identify salient region in image. Image contrast has been utilized as an effective feature to detect the salient region. The conventional contrast measures utilize both spectral and spatial properties of image in many salient region detection methods. However, they only consider the local characteristics of image region, consequently, the global characteristics are neglected. This paper presented a new contrast measure by exploiting both local and global characteristics of image regions. Furthermore, the proposed measure is utilized to perform salient region detection in image. Experiments are conducted on the MSRA test database to compare the performance of the proposed approach with the state-of-the-art salient region detection algorithms.
Introduction: Previous studies have shown that applying external vibrational load of a certain frequency and intensity can accelerate the tooth movement, thus shorten orthodontic treatment time. It is believed that th...
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Introduction: Previous studies have shown that applying external vibrational load of a certain frequency and intensity can accelerate the tooth movement, thus shorten orthodontic treatment time. It is believed that the optimal frequency is correlative to the modal mode of the target toothperiodontal ligament(PDL)-bone complex(TPBC). This study aims to investigate modal mode, natural frequencies included,of the TPBC using finite element(FE) method. Methods: A three dimensional TPBC model of a maxillary central incisor were reconstructed from cone beam CT images. A FE model was then created in Ansys 14.5. The tooth, PDL, and bone were meshed with 10-node hexahedral elements(SOLID 187)with the numbers of the elements equaled to 17,803, 4,137,and 32,577, respectively. All parts were considered homogeneous and isotropic. The material properties(Young's Module(Pa),Poisson's ratio and Density(kg/m3) as: 2e10, 0.31 and 1.36e3 for tooth, 4.7e5, 0.4 and 1.1e3 for PDL, and 3.5e9, 0.33 and 1.4e3 for bone, respectively. Fixed constraint was set for the alveolar bone. PCG Lanczos method was used in the modal *** order modes were included in the computation. Result:The first six order modal mode of the TPBC were *** corresponding natural frequencies were 702, 1049, 2713,2805, 3026, and 3530 Hz, respectively. Different tooth movement patterns, including translation, rotation, extrusion/intrusion,were observed in these modal modes. Conclusion: The proposed method is able to obtain the natural frequencies and modal modes of a TPBC. The results can be used as reference for developing vibrational device to accelerate orthodontic tooth movement.
Contractively invariant ellipsoids have been extensively used as estimates of the domain of attraction of a linear system under a saturated linear feedback. For a discrete-time linear system with a single input subjec...
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ISBN:
(纸本)9781467360890
Contractively invariant ellipsoids have been extensively used as estimates of the domain of attraction of a linear system under a saturated linear feedback. For a discrete-time linear system with a single input subject to actuator saturation, based on a convex hull representation of the saturated linear feedback, a necessary and sufficient condition for an ellipsoid to be contractively invariant was previously established. Based on this condition, the determination of the maximal contractively invariant ellipsoid can be formulated and solved as an LMI problem. In this paper, we develop a criterion to determine if a contractively invariant ellipsoid is the maximal one for discrete-time saturated linear systems with multiple inputs. This criterion is based on the solution of an LMI problem, which involves a generalized convex hull representation of saturated linear feedbacks, and includes the existing result for discrete-time saturated linear systems with a single input as a special case. Simulation results demonstrate the effectiveness of our results.
An adaptive distributed differential evolution algorithm is proposed based on the change of the individual's fitness value. Firstly, the initial population is divided into several subpopulations. When the migratio...
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An adaptive distributed differential evolution algorithm is proposed based on the change of the individual's fitness value. Firstly, the initial population is divided into several subpopulations. When the migration condition is satisfied, the best individual in each subpopulation will replace the worst individual of its neighbor subpopulations according to the Von Neumann topology. The migration mechanism among subpopulations enables the information to be communicated in the whole population. Meanwhile, the adaptive mechanism of F and CR is presented for assigning different F and CR to each individual according to the individual's fitness. Numerical results show that, the proposed algorithm is beneficial to explore the solution space, which can avoid the premature convergence and search the excellent solutions.
In this paper,a two-degree-of-freedom(TDOF) controller design method for multi-inputs multi-outputs(MIMO) system with multiple time delays based on inversing decoupling is ***,an inversing decoupling method based on t...
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ISBN:
(纸本)9781479900305
In this paper,a two-degree-of-freedom(TDOF) controller design method for multi-inputs multi-outputs(MIMO) system with multiple time delays based on inversing decoupling is ***,an inversing decoupling method based on the factorization of the plant is ***,the H2 optimal controller design method is applied to the decoupled single-input/single-output(SISO) system after the system has been ***,a TDOF controller is designed for the decoupled closed-loop *** with other developed methods,the proposed design method has two main advantages. One is that the design procedure is simple and the obtained controllers are given in analytical *** other is that better performance can be achieved since the TDOF control structure can isolate the disturbance from the *** are provided to illustrate the effectiveness of the proposed design approach.
作者：
Zhao, YueSu, JianboDepartment of Automation
Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education Shanghai200240 China
Local Binary Pattern (LBP) features and its variants are computed on the patches with the fixed positions and a fixed size in images, while the limited variety of the size and position cannot accurately measure the na...
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