The parallel transportation system based on the method of ACP (Artificial systems, Computing experiments, Parallel control) will promote the level of city traffic intelligent decision and scientific management. A key ...
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ISBN:
(纸本)9781479960583
The parallel transportation system based on the method of ACP (Artificial systems, Computing experiments, Parallel control) will promote the level of city traffic intelligent decision and scientific management. A key problem in the system is how to design a computing experiment method to predict and evaluate the traffic state by real-time and accuracy. This paper introduces the discrete-time queuing model to analyze the traffic flow at the signalized intersection and gives the evaluation conditions of the traffic state. Then, the evaluation conditions are applied to judge the traffic state based on the prediction data of traffic flows from the grey model. Experiments show the method is effective and feasible.
Assessment and analysis of the intersection status can help to make the right choice of interventions, it's can bring convenience to solve the traffic congestion. In this paper, interval type-2 fuzzy sets is appli...
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ISBN:
(纸本)9781479947522
Assessment and analysis of the intersection status can help to make the right choice of interventions, it's can bring convenience to solve the traffic congestion. In this paper, interval type-2 fuzzy sets is applied in the analysis of the intersection state and congestion intervention, dynamic fuzzy comprehensive evaluation and footprint of uncertainty are used to assess the intersection condition. Combined with the example of intersection congestion, through corresponding intervention measures to improve the intersections crowded conditions. Thus the linguistic dynamic orbits of road status figured out.
作者：
Wang, ZhuoLiu, DerongUniv Alberta
Dept Elect & Comp Engn Edmonton AB T6G 2V4 Canada Chinese Acad Sci
Inst Automat State Key Lab Management & Control Complex Syst Beijing 100190 Peoples R China Univ Illinois
Dept Elect & Comp Engn Chicago IL 60607 USA
This paper presents some new methods to analyze the stability of the equilibrium point, and the bounded-input/ boundedstate (BIBS) and the bounded-input/ bounded-output (BIBO) stabilities for linear systems and a clas...
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This paper presents some new methods to analyze the stability of the equilibrium point, and the bounded-input/ boundedstate (BIBS) and the bounded-input/ bounded-output (BIBO) stabilities for linear systems and a class of nonlinear systems. We study these systems in both continuous-time and discrete-time forms, using approaches from model-based methods to datadriven methods. For linear systems, our work about the BIBS and the BIBO stabilities does not concern the statecontrollability or the state observability. The data-driven methods can analyze the stabilities by doing some simple experiments and observations, while not identifying the corresponding parameter matrices. Our methods are easier
The results of traditional traffic status analysis are mostly single values, whose accuracy can't be determined;fuzzy c-means clustering (FCM) algorithm based on fuzzy theory can calculate the clustering center of...
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ISBN:
(纸本)9781479947522
The results of traditional traffic status analysis are mostly single values, whose accuracy can't be determined;fuzzy c-means clustering (FCM) algorithm based on fuzzy theory can calculate the clustering center of plenty data quickly and easily;linguistic dynamic systems could describe the dynamic rules of complexsystems in the language level. In this paper, membership functions are decided by FCM;result of a specific time period taken as one example is obtained;it's discussed that linguistic dynamic analysis of traffic status in different period within a day by the same method.
In the presence of negative weights in communication graph, bipartite consensus is an extension of the traditional consensus problems where the communication weights are all positive. An output-based distributed contr...
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ISBN:
(纸本)9781479944873
In the presence of negative weights in communication graph, bipartite consensus is an extension of the traditional consensus problems where the communication weights are all positive. An output-based distributed control protocol is established to solve the bipartite consensus of the homogeneous multi-agent systems. Bipartite consensus problem is equivalent to a linear stabilizable and detectable problem by introducing a gauge transformation. If the multi-agent systems can reach the bipartite consensus, then the signed digraph should be structurally balanced and contains a spanning tree. Finally, the implementation provides three cases to validate the effectiveness of our developed criteria.
A pose estimation approach for the navigation of mobile robot in unknown environments is proposed. Compared with the existing mainstream SLAM, the proposed approach has a better generality without the help of odometer...
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A pose estimation approach for the navigation of mobile robot in unknown environments is proposed. Compared with the existing mainstream SLAM, the proposed approach has a better generality without the help of odometers or motion models and it is completely based on external environment perceived by a laser sensor. In each of the laser frames, landmark points are first determined and they are then coded into a series of description matrixes. On this basis, by considering the landmarks matching in two neighboring laser frames, the pose change of the robot may be calculated, and the understanding of laser-based landmarks by geometric coding is achieved. The proposed approach is proved to be effective by the experiments of a tracked robot.
Space launch is a complex project with high risk,and failure of space launch may cause a great loss to people’s life,property and important *** a resonable and effective emergency response program is critical and imp...
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Space launch is a complex project with high risk,and failure of space launch may cause a great loss to people’s life,property and important *** a resonable and effective emergency response program is critical and important for space ***,a Decision Network Planning(DNP)method is proposed to describe logic relations of emergency response procedures,based on which the logical reasonability and rigor,coordination of several involved departments,timeliness of emergency measures and sufficiency of resources guarantee are ***,the critical path and resource guaranteed rate are calculated to analyze the degree of control in the emergency process of space launch ***,a case of filling leakage is used to show the helpfulness of the proposed method.
This paper presents a novel observer-critic architecture for solving the near-optimal control problem of uncertain nonlinear continuous-time systems. Two neural networks (NNs) are employed in the architecture: an obse...
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This paper presents a novel observer-critic architecture for solving the near-optimal control problem of uncertain nonlinear continuous-time systems. Two neural networks (NNs) are employed in the architecture: an observer NN is constructed to get the knowledge of uncertain system dynamics and a critic NN is utilized to derive the optimal control. The observer NN and the critic NN are tuned simultaneously. By using the recorded and instantaneous data together, the optimal control can be derived without the persistence of excitation condition. Meanwhile, the closed-loop system is guaranteed to be stable in the sense of uniform ultimate boundedness. No initial stabilizing control is required in the developed algorithm. An illustrated example is provided to demonstrate the effectiveness of the present approach.
Crustal movement simulation takes the very essential effect in the research on water cycle and related land surface processes. In this paper, a crustal movement simulation system (CMSS) is presented. The system enable...
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ISBN:
(纸本)9781479973989
Crustal movement simulation takes the very essential effect in the research on water cycle and related land surface processes. In this paper, a crustal movement simulation system (CMSS) is presented. The system enables researchers investigate the effects of crustal movement on rivers and lakes in the laboratory environment. The CMSS proposed consists of twelve sets of parallel mechanism supported by four serial chains with three degree of freedoms (DOFs). The kinematics analysis of the parallel mechanism with four serial chains is provided. To solve the coplanar problem of four screws, a control method based on linear interpolation with parabola transition is introduced. Surface fitting algorithm based on geometric relations is used to simulate the land surface. Experiment results demonstrate the effectiveness of the system and the methods proposed.
Amblyopia is a common yet hard-to-cure disease in children and results in poor or blurred vision. Some efforts such as voxel-based analysis, cortical thickness analysis have been tried to reveal the pathogenesis of am...
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ISBN:
(纸本)9780819498311
Amblyopia is a common yet hard-to-cure disease in children and results in poor or blurred vision. Some efforts such as voxel-based analysis, cortical thickness analysis have been tried to reveal the pathogenesis of amblyopia. However, few studies focused on alterations of the functional connectivity (FC) in amblyopia. In this study, we analyzed the abnormalities of amblyopia patients by both the seed-based FC with the left/right primary visual cortex and the network constructed throughout the whole brain. Experiments showed the following results: (1)As for the seed-based FC analysis, FC between superior occipital gyms and the primary visual cortex was found to significantly decrease in both sides. The abnormalities were also found in lingual gyms. The results may reflect functional deficits both in dorsal stream and ventral stream. (2)Two increased functional connectivities and 64 decreased functional connectivities were found in the whole brain network analysis. The decreased functional connectivities most concentrate in the temporal cortex. The results suggest that amblyopia may be caused by the deficits in the visual information transmission.
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