检索结果-内蒙古大学图书馆

OCEANS - Europe

作者： Chonglei Liu Jiling Zhang Tianyu Li Jinghong Jiang Li Yin Shuqiu Li Haining Huang Key Laboratory of Science and Technology on Advanced Underwater Acoustic Signal Processing CAS Beijing China

The domain of Matched-field processing (MFP) has been comprehensively studied in temperate oceans. But MFP source localization in under-ice shallow water environment has rarely conducted and is a topic of great novelty. The frequent interactions of sound and ice will lead dramatic reflection, attenuation and modal dispersion which will pose additional difficulties and uncertainties to localization due to the intense environmental sensitivity of the MFP method. This paper constructs the basic MFP source localization scheme in under-ice environment. Firstly, a hybrid acoustic propagation model called OASR-KRAKENC that considers the effects of ice reflection and attenuation are constructed to generate the replicas in under-ice waveguide. Then the incoherent broadband MFP approach of conventional linear correlation (Bartlett) and minimum variance (MV) algorithm are verified by the real data collected from the northern Yellow Sea in winter. The localization performance of real data validates the feasibility of MFP in under-ice environment.

关键词： Ice Acoustics Reflection Reflection coefficient Attenuation Sea surface Program processors

来源：评论

学校读者我要写书评

暂无评论

A method for estimating along-track velocity of synthetic aperture sonar

A method for estimating along-track velocity of synthetic ap...

引用

OCEANS - Europe

作者： Rongxing Zhong Yu Zhang Jiyuan Liu Yujie Wang Shenglong Jin Key Laboratory of Science and Technology on Advanced Underwater Acoustic Signal Processing Chinese Academy of Sciences

Along-track velocity is critical for synthetic aperture sonar (SAS) imaging, as well as for the navigation of carrier. SAS systems typically measure velocity through a Doppler Velocity Log (DVL), but it is not always available. Based on these, this paper describes a method for estimating the along-track velocity using displaced phase center (DPC) approximation. The main idea of the proposed method is to obtain the displacement of SAS between two adjacent pings using the spatiotemporal cross-correlation coefficient matrix, and then find the along-track velocity by a calculating formula. Simulations and results of real data from lake experiments show that the estimated velocity is quite accurate, and the estimated velocity can be used for carrier navigation and image reconstruction.

关键词： Synthetic aperture sonar Sonar navigation Receivers Estimation Velocity measurement Correlation coefficient

来源：评论

学校读者我要写书评

暂无评论

Sigma-pi neural unit: Switching circuit simulation 19

Sigma-pi neural unit: Switching circuit simulation

引用

2019 International Conference on Artificial Intelligence, Information processing and Cloud Computing, AIIPCC 2019

作者： Potapov, Alexander A. Zhang, Wei Feng, Tianhua Rekhviashvili, Sergo V.A. Kotel’nikov Institute of Radio Engineering and Electronics Russian Academy of Sciences Moscow Russia JNU-IREE Joint Laboratory of Fractal Method and Signal Processing Department of Electronic Engineering College of Information Science and Technology Jinan University Guangzhou China JNU-IREE Joint Laboratory of Fractal Method and Signal Processing Department of Electronic Engineering College of Information Science and Technology Jinan University Guangzhou China Institute of Applied Mathematics and Automation KBSC Russian Academy of Sciences Nalchik Russia

ISBN: (纸本)9781450376334

Electrical circuit to control power is designed for TTL IC sigma-pi neural units. The designed unit is implementable as an integral circuit. The unit representation features are considered in a given circuitry basis. A neural circuit simulation is performed through the PSpice interpreter. The properties of neural networks are considered. The prospects for creating multi-bit processors based on sigma-pi neural units are discussed. © 2019 Association for Computing Machinery.

关键词： Neural networks

来源：评论

学校读者我要写书评

暂无评论

A Novel Special Emitter Identification Method Based on Improved Subclass Discriminant Analysis 2

A Novel Special Emitter Identification Method Based on Impro...

引用

2017 IEEE 第2届先进信息技术,电子与自动化控制国际会议(IAEAC 2017)

作者： Guiliang Wang Yuanling Huang Science and Technology on Blind Signal Processing Laboratory

Radio frequency fingerprinting(RFF) is used to uniquely identify individual radios by exploiting the radio frequency characteristics. Often attributing to the phase ambiguity, the features of an emitt

ISBN: (纸本)9781467389808

关键词： Special emitter identification Radio frequency fingerprinting Discriminant analysis Feature extraction Pattern recognition Feature extraction discriminant analysis Pattern recognition emitters phase ambiguity Clustering algorithms sample covariance radiofrequency

来源：评论

学校读者我要写书评

暂无评论

A Weak Target Detection Method Based on Spatial Power Spectrum Map(SPS-MAP) 9th

A Weak Target Detection Method Based on Spatial Power Spectr...

引用

2017 9th International Conference on Modelling, Identification and Control (ICMIC 2017)

作者： Peng Jin Jinyu Xiong Xiaoyong Zhang Liankun Bo the Science and Technology On Blind Signal Processing Laboratory

ISBN: (纸本)9781509065769;9781509065752

Aiming at the problem that the detection probability of the moving platform using traditional detection method is low and even bad under low SNR condition.A weak target detection method based on spatial power spectrum map(SPS-MAP) is put *** with traditional cross direction finding method,this method omits the step in which the location is determined with the "post processed" SPS peak information and instead maps the SPS curve directly to the search grid to achieve the purpose of location as *** this thesis,the theoretical properties and computational complexity of the method are deduced and *** last,simulation results show that the proposed method can effectively detect targets in low SNR conditions.

关键词： spatial power spectrum direction finding weak target detection passive location mobile platform

来源：评论

学校读者我要写书评

暂无评论

Direct Location for Multiple Passive Radars without and with Reference

Direct Location for Multiple Passive Radars without and with...

引用

2018 3rd International Conference on Communication,Image and signal processing（CCISP 2018）

作者： K.K.Song Y.X.Yang H.F.Peng National Key Laboratory of Science and Technology on Blind Signal Processing

The problem of stationary target location by multiple passive radar sensors that using unknown and non-cooperative opportunity illuminator is considered. Traditional twostep approach which estimating the time difference of arrival(TDOA) and angle of arrival(AOA) firstly and locating using those parameters secondly. We explore the direct location with multiple passive radar sensors without estimating the intermediate parameters. As the reference path from the transmitter to receivers may be blocked in practice, we discuss the both cases that location without and with reference path. Two maximum likelihood algorithms of direct location are proposed for multiple passive radar sensors without and with reference. Monte Carlo simulations indicate that the direct location algorithm is superior to two-step approach with TDOA and AOA at low SNR for multiple passive radar sensors.

关键词： AOA Direct Location for Multiple Passive Radars without and with Reference

来源：评论

学校读者我要写书评

暂无评论

Low Altitude, Slow Speed and Small Size Object Detection Improvement in Noise Conditions Based on Mixed Training

Low Altitude, Slow Speed and Small Size Object Detection Imp...

引用

2018 3rd International Conference on Communication,Image and signal processing（CCISP 2018）

作者： J.F.Que H.F.Peng J.Y.Xiong National Key Laboratory of Science and Technology on Blind Signal Processing

The low altitude, slow speed and small size object which we call LSS-object for short, such as small UAV(unmanned aerial vehicles) have become a hot issue of air defense security, which is difficult to detect and identify accurately from the image. In this paper, aiming at the problem of LSS-object detection under noise environment, the detection method based on deep learning is proposed. Firstly, a standard training dataset consisting 5 classes of typical objects is constructed. Then, the standard dataset is augmented with noise of different intensity. Finally, YOLO v3 algorithm is used to form a LSS-object detection system which can adapt to environment noise. The training and detection experiments were carried out on the GPU server. After only using the noise-free dataset for training, the mAP(mean Average Precision) of the noise-free test set detection reached 81.07%, but the mAP decreased to 20.68% when the noise variance was *** adopting the mixed training strategy of the dataset with noise variance of 0.01 and noise-free data, the mAP for the test set detection with noise variance of 0.03 was increased to 70.61%, and the mAP still reached 79.85% in noise-free test set detection. The experiment results show that the mixed training strategy can greatly improve the accuracy in the noisy images detection while maintaining a higher accuracy in noise-free images.

关键词： image LSS Low Altitude Slow Speed and Small Size Object Detection Improvement in Noise Conditions Based on Mixed Training Object

来源：评论

学校读者我要写书评

暂无评论

Noiseless linear amplification for the single-photon entanglement of arbitrary polarization–time-bin qudit

引用

Chinese Physics B 2019年第1期28卷 210-217页

作者： Ling-Quan Chen Yu-Bo Sheng Lan Zhou School of Science Nanjing University of Posts and TelecommunicationsNanjing 210003China College of Electronic and Optical Engineering&College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210003China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology(Ministry of Education) Nanjing University of Posts and TelecommunicationsNanjing 210003China Institute of Signal Processing Transmission Nanjing University of Posts and TelecommunicationsNanjing 210003China

Single-photon entanglement(SPE) is an important source in quantum communication. In this paper, we put forward a single-photon-assisted noiseless linear amplification protocol to protect the SPE of an arbitrary polarization–time-bin qudit from the photon transmission loss caused by the practical channel noise. After the amplification, the fidelity of the SPE can be effectively increased. Meanwhile, the encoded polarization–time-bin features of the qudit can be well preserved. The protocol can be realized under the current experimental conditions. Moreover, the amplification protocol can be extended to resist complete photon loss and partial photon loss during the photon transmission. After the amplification, we can not only increase the fidelity of the target state, but also solve the decoherence problem simultaneously. Based on the above features, our amplification protocol may be useful in future quantum communication.

关键词： single-photon entanglement noiseless linear amplification polarization–time-bin qudit complete and partial photon loss

来源：评论

学校读者我要写书评

暂无评论

Let's play music: Audio-driven performance video generation

arXiv

引用

arXiv 2020年

作者： Zhu, Hao Li, Yi Zhu, Feixia Zheng, Aihua He, Ran Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education School of Computer Science and Technology Anhui University Hefei China CASIA Beijing China School of Artificial Intelligence University of Chinese Academy of Sciences Beijing China Center for Excellence in Brain Science and Intelligence Technology CAS Beijing China

We propose a new task named Audio-driven Performance Video Generation (APVG), which aims to synthesize the video of a person playing a certain instrument guided by a given music audio clip. It is a challenging task to generate the high-dimensional temporal consistent videos from low-dimensional audio modality. In this paper, we propose a multistaged framework to achieve this new task to generate realistic and synchronized performance video from given music. Firstly, we provide both global appearance and local spatial information by generating the coarse videos and keypoints of body and hands from a given music respectively. Then, we propose to transform the generated keypoints to heatmap via a differentiable space transformer, since the heatmap offers more spatial information but is harder to generate directly from audio. Finally, we propose a Structured Temporal UNet (STU) to extract both intra-frame structured information and inter-frame temporal consistency. They are obtained via graph-based structure module, and CNN-GRU based high-level temporal module respectively for final video generation. Comprehensive experiments validate the effectiveness of our proposed framework. Copyright © 2020, The Authors. All rights reserved.

关键词： Music

来源：评论

学校读者我要写书评

暂无评论

Reliable Multi-Modal Object Re-Identification via Modality-Aware Graph Reasoning

arXiv

引用

arXiv 2025年

作者： Wan, Xixi Zheng, Aihua Wang, Zi Jiang, Bo Tang, Jin Ma, Jixin Information Materials and Intelligent Sensing Laboratory of Anhui Province Anhui Provincial Key Laboratory of Security Artificial Intelligence School of Artificial Intelligence Anhui University Hefei230601 China School of Biomedical Engineering Anhui Medical University Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Hefei China Anhui Provincial Key Laboratory of Multimodal Cognitive Computation School of Computer Science and Technology Anhui University Hefei230601 China School of Computing and Mathematical Sciences University of Greenwich LondonSE10 9LS United Kingdom

Multi-modal data provides abundant and diverse object information, crucial for effective modal interactions in Re-Identification (ReID) tasks. However, existing approaches often overlook the quality variations in local features and fail to fully leverage the complementary information across modalities, particularly in the case of low-quality features. In this paper, we propose to address this issue by leveraging a novel graph reasoning model, termed the Modality-aware Graph Reasoning Network (MGRNet). Specifically, we first construct modality-aware graphs to enhance the extraction of fine-grained local details by effectively capturing and modeling the relationships between patches. Subsequently, the selective graph nodes swap operation is employed to alleviate the adverse effects of low-quality local features by considering both local and global information, enhancing the representation of discriminative information. Finally, the swapped modality-aware graphs are fed into the local-aware graph reasoning module, which propagates multimodal information to yield a reliable feature representation. Another advantage of the proposed graph reasoning approach is its ability to reconstruct missing modal information by exploiting inherent structural relationships, thereby minimizing disparities between different modalities. Experimental results on four benchmarks (RGBNT201, Market1501-MM, RGBNT100, MSVR310) indicate that the proposed method achieves state-of-the-art performance in multi-modal object ReID. The code for our method will be available upon acceptance. Copyright © 2025, The Authors. All rights reserved.

关键词： Modal analysis

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：