Based on the broad-band random vibration experiment on a structure model of clamping support used in transportation, this paper investigates the problems on detecting the time, evaluating the extent and locating the p...
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ISBN:
(纸本)1846285836
Based on the broad-band random vibration experiment on a structure model of clamping support used in transportation, this paper investigates the problems on detecting the time, evaluating the extent and locating the place of the attachment bolt looseness in the structure model. Firstly, wavelet transform was used to analyse the structural acceleration response data, which includes the moment when the bolt looseness occurred. An obvious step leap along the time axis, which shows the time when the bolt looseness occurs, can be clearly observed in the level-1 details of the wavelet decomposition. Secondly, ARX (auto-regression with exogenous inputs) model was constructed from the measured input and output signals, then the statistical indices of the model residual error were defined as the damage characteristic parameter indicating the severity and location of the loose bolts in the clamping support. The experimental study shows that the extracted characteristic parameter in this paper can be more appropriate than measuring the base frequency for monitoring the bolts looseness at early stage.
We propose simple schemes that can perfectly identify projective measurement apparatuses secretly chosen from a finite set. Entanglement is used in these schemes both to make possible the perfect identification and to...
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We propose simple schemes that can perfectly identify projective measurement apparatuses secretly chosen from a finite set. Entanglement is used in these schemes both to make possible the perfect identification and to improve the efficiency significantly. Based on these results, a brief discussion on the problem of how to appropriately define distance measures of measurements is also provided.
We show that in some cases, catalyst-assisted entanglement transformation cannot be implemented by multiple-copy transformation for pure states. This fact, together with the result we obtained in R. Y. Duan, Y. Feng, ...
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We show that in some cases, catalyst-assisted entanglement transformation cannot be implemented by multiple-copy transformation for pure states. This fact, together with the result we obtained in R. Y. Duan, Y. Feng, X. Li, and M. S. Ying, Phys. Rev. A 71, 042319 (2005), namely that the latter can be completely implemented by the former, indicates that catalyst-assisted transformation is strictly more powerful than multiple-copy transformation. For the purely probabilistic setting we find, however, these two kinds of transformations are geometrically equivalent in the sense that the sets of pure states that can be converted into a given pure state with maximal probabilities not less than a given value have the same closure, regardless of whether catalyst-assisted transformation or multiple-copy transformation is used.
This paper considers the problem of perturbation analysis for the QR factorization of a special architecture called unitary-symmetric matrix. The perturbation bounds of the triangular factor and orthogonal factor in t...
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This paper considers the problem of perturbation analysis for the QR factorization of a special architecture called unitary-symmetric matrix. The perturbation bounds of the triangular factor and orthogonal factor in the QR factorization of unitary-symmetric matrix arc derived, together with the perturbation bound correspondences between the unitary-symmetric matrix and its mother matrix highlighted.
The majorization theory has been applied to analyze the mathematical structure of quantum algorithms. An empirical conclusion by numerical simulations obtained in the previous literature indicates that step-by-step ma...
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The majorization theory has been applied to analyze the mathematical structure of quantum algorithms. An empirical conclusion by numerical simulations obtained in the previous literature indicates that step-by-step majorization seems to appear universally in quantum adiabatic algorithms. In this paper, a rigorous analysis of the majorization arrow in a special class of quantum adiabatic algorithms is carried out. In particular, we prove that for any adiabatic algorithm of this class, step-by-step majorization of the ground state holds exactly. For the actual state, we show that step-by-step majorization holds approximately, and furthermore that the longer the running time of the algorithm, the better the approximation.
In this paper,a novel fusion recognition algorithm of courtesy and legal amounts in handwritten Chinese bank checks is *** the other fusion methods based on the independent recognition
In this paper,a novel fusion recognition algorithm of courtesy and legal amounts in handwritten Chinese bank checks is *** the other fusion methods based on the independent recognition
The development of flight control systems using classical control techniques is a costly and time-consuming process. This paper shows how to use genetic algorithm (GA) and modern control techniques to determine the co...
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The development of flight control systems using classical control techniques is a costly and time-consuming process. This paper shows how to use genetic algorithm (GA) and modern control techniques to determine the control parameters of the flight control law within the classical structure. An example of designing longitudinal flight control law with the proposed method is presented. The designed flight control law be simulated on a 6 degree-of-freedom nonlinear model of the aircraft
An open robot control system pursues easy extension, flexible reconfiguration, facile portability and jointless interoperation. Therefore, the system elements from multi-disciplinary areas can be integrated and reconf...
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An open robot control system pursues easy extension, flexible reconfiguration, facile portability and jointless interoperation. Therefore, the system elements from multi-disciplinary areas can be integrated and reconfigured easily in such a system. Also the system modules can be ported flexibly. In this paper, a Rt-Linux based open robot controller (RTOC) is investigated. A reference model for robot controlling is proposed, in which hardware platform, operating system module and application modules are included. Then for the implementation of RTOC, two critical implementation problems - layered architecture and the intra-layer interfaces are discussed on the base of its reference model. The RTOC openness is also analyzed. Consequently, the proposed RTOC is applied to an industrial arc welding robot
Since 1990s, a large amount of lane detection systems have been designed for comparatively simple road condition on highway. In this paper, we propose a real-time lane detection algorithm in some complex conditions, i...
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Since 1990s, a large amount of lane detection systems have been designed for comparatively simple road condition on highway. In this paper, we propose a real-time lane detection algorithm in some complex conditions, including colored lane marks and roads with special traffic marks. The algorithm presented in this paper is based on a hyperbola model, which was proposed in our group's previous work. Tracking information is used to avoid the negative influence of arrow marks, and the colored lane marks are detected after image enhancement. The algorithm has been tested, and the experimental results demonstrate its high performance in these complex conditions
In this paper, we address the general problem of learning from both labeled and unlabeled data. Based on the reasonable assumption that the label of each data can be linearly reconstructed from its neighbors' labe...
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