With the development of energy Internet, the business types of power grid are increasing day by day, and the demand of multi service bearing is prominent. The mode of multi network hybrid networking puts forward highe...
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An adaptive frequency hopping (AFH) scheme can increase the interference rejection capability of the frequency hopping system, which adopt digital signal processing technology, so it is proposed in military communicat...
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This paper is concerned with the guaranteed cost robust covariance intersection (CI) fusion estimation problem for systems with multiplicative noises, colored measurements noises and uncertain noise variances. The ori...
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Recent research exhibits that the neural network based hybrid beamforming multiple-input multiple-output (MIMO) system can improve the spectrum efficiency and biterror-rate (BER) significantly. However, the neural net...
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In this paper, the project cost control was discussed by logistics. And the constructing corporation costing management is running through the whole process of the project constructing. The project cost is composed of...
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Automatic-repeat-request (ARQ) based decode-and-forward (DF) strategy plays an important role in reliable multi-hop communication. However, when a large number of packets need to be transmitted, the overhead for contr...
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Automatic-repeat-request (ARQ) based decode-and-forward (DF) strategy plays an important role in reliable multi-hop communication. However, when a large number of packets need to be transmitted, the overhead for control messages increases significantly and it causes large end-to-end delay which is unacceptable in some emergency scenarios. To minimize the control traffic overhead, we propose a low latency feedback aggregation based packet retransmission protocol for wireless multi-hop networks. The source node transmits data packets within the sliding window constantly. The relay nodes and destination node choose to work with the proposed end-to-end retransmission scheme or the proposed half-way retransmission scheme according to the size of sliding window and the number of hops. In the proposed end-to-end transmission scheme, the destination node sends one ACK packet which includes trans-mission results of all packets in the sliding windows. In the halfway retransmission scheme, the relay nodes send NACK to the previous node for retransmission. Simulation results show that compared with traditional hop-by-hop retransmission, our method can achieve lower latency.
This paper presents a modified position tracking control strategy using command filtering backstepping for the flexible-joint ***,the second-order command filter is adopted in the backstepping procedure to derive the ...
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ISBN:
(数字)9781728158556
ISBN:
(纸本)9781728158556;9781728158563
This paper presents a modified position tracking control strategy using command filtering backstepping for the flexible-joint ***,the second-order command filter is adopted in the backstepping procedure to derive the virtual control function and its *** problem of "explosion of complexity" caused by the calculation of the partial derivatives of virtual control inputs is ***,to reduce the filtering error caused by adopting the command filter,the filtering error compensation is designed,and the stability of the tracking error closed-loop system is verified based on Lyapunov stability ***,simulation results on single-link flexible-joint manipulator show that the tracking accuracy is increased by about 12.8%,which indicate the position tracking accuracy is guaranteed by the proposed control method.
Most of the existing Chinese entity relation extraction models have adopted methods which are based on character or word input. However, the word-based input method ignores potential word information in the sentence, ...
ISBN:
(数字)9781728143903
ISBN:
(纸本)9781728143910
Most of the existing Chinese entity relation extraction models have adopted methods which are based on character or word input. However, the word-based input method ignores potential word information in the sentence, and the method based on word input will be affected by the spread of word segmentation errors. In order to solve these problem, we introduce a lattice model that can merge words and characters input and use BiGRU instead of BiLSTM. After comparative experiments, our model achieves better results.
In this paper, we consider one of the approaches to the study of the characteristics of an information system that is under the influence of various factors, and their management using neural networks and wavelet tran...
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Detection of salient object is useful in many computer tasks. In this paper, we propose a novel spectral clustering(SC)based method to detect salient object. Image can be expressed as a graph which is composed by node...
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ISBN:
(纸本)9781467391955
Detection of salient object is useful in many computer tasks. In this paper, we propose a novel spectral clustering(SC)based method to detect salient object. Image can be expressed as a graph which is composed by nodes and edges, where nodes are superpixels generated by segmenting algorithms and edge strengths are proportional to superpixels similarity. We jointly consider color distribution and spatial distance to measure the similarity between superpixels. Then SC algorithm is applied to cluster the nodes(superpixels) into two classes, one class for foreground and the other for background. It is reasonable that salient regions are far different from the background, so we can take salient object detection as a two-class clustering *** experiments on a public database demonstrate that our model is not only easy to implement but also outperforms lots of recently proposed methods.
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