检索结果-南通市图书馆

Survey on rain removal from videos or a single image

Science China(Information Sciences) 2022年第1期65卷 72-94页

作者： Hong WANG Yichen WU Minghan LI Qian ZHAO Deyu MENG School of Mathematics and Statistics ministry of education key lab of intelligent networks and network security Xi'an Jiaotong University Pazhou lab

Rain can cause performance degradation of outdoor computer vision tasks. Thus, the exploration of rain removal from videos or a single image has drawn considerable attention in the field of image processing. Recently, various deraining methodologies have been proposed. However, no comprehensive survey work has yet been conducted to summarize existing deraining algorithms and quantitatively compare their generalization ability, and especially, no off-the-shelf toolkit exists for accumulating and categorizing recent representative methods for easy performance reproduction and deraining capability evaluation. In this regard, herein, we present a comprehensive overview of existing video and single image deraining methods as well as reproduce and evaluate current state-of-the-art deraining methods. In particular, these approaches are mainly classified into model-and deep-learning-based methods, and more elaborate branches of each method are presented. Inherent abilities, especially generalization performance, of the state-of-the-art methods have been both quantitatively and visually analyzed through thorough experiments conducted on synthetic and real benchmark datasets. Moreover, to facilitate the reproduction of existing deraining methods for general users, we present a comprehensive repository with detailed classification, including direct links to 85 deraining papers, 24 relevant project pages, source codes of 12 and 25 algorithms for video and single image deraining, respectively, 5 and 10 real and synthesized datasets, respectively, and 7 frequently used image quality evaluation metrics, along with the corresponding computation codes. Research limitations worthy of further exploration have also been discussed for future research along this direction.

关键词： rain removal maximum a posterior estimation deep learning generalization performance comprehensive repository

来源：

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Two-step transmission with artificial noise for secure wireless SIMO communications

引用

Science China(Information Sciences) 2015年第4期58卷 115-127页

作者： WANG Bo MU PengCheng YANG PeiZhi YIN QinYe ministry of education key lab for intelligent networks and network security School of Electronic and Information Engineering Xi’an Jiaotong University

The issue of physical layer security of the wireless single-input multiple-output(SIMO) system is addressed in this paper. We propose a two-step transmission scheme with artificial noise to improve the security and the scheme does not require the channel state information of the eavesdropper. In the first step, the destination which has multiple antennas generates a random reference symbol and artificial noise and transmits them in the direction of the source and its orthogonal space, respectively. The reference symbol is received by the source without being polluted by the artificial noise, while it is jammed by the artificial noise for the eavesdropper. In the second step, the symbol of the source is multiplied by the received reference symbol and then transmitted. Finally, the destination can directly estimate the symbol of the source using the reference symbol. However, the eavesdropper needs to additionally estimate the reference symbol for demodulating the symbol of the source, which usually obtains an inaccurate result due to the artificial noise. The informationtheoretic security of our scheme is analyzed and a lower bound of the achievable secrecy rate is derived. The performance of the new scheme is compared with that of the traditional approach under different input signals through numerical simulations. The results show that the proposed scheme outperforms the traditional SIMO approach especially in the high SNR region.

关键词： wireless communication physical layer security multi-antenna SIMO artificial noise

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Output feedback robust model predictive control with unmeasurable model parameters and bounded disturbance

引用

Chinese Journal of Chemical Engineering 2016年第10期24卷 1431-1441页

作者： Baocang Ding Hongguang Pan ministry of education key lab For intelligent networks and network security Department of AutomationSchool of Electronic and Information EngineeringXi'an Jiaotong University

The output feedback model predictive control(MPC),for a linear parameter varying(LPV) process system including unmeasurable model parameters and disturbance(all lying in known polytopes),is *** previously developed tools,including the norm-bounding technique for relaxing the disturbance-related constraint handling,the dynamic output feedback law,the notion of quadratic boundedness for specifying the closed-loop stability,and the ellipsoidal state estimation error bound for guaranteeing the recursive feasibility,are merged in the control *** previous approaches are shown to be the special *** example of continuous stirred tank reactor(CSTR) is given to show the effectiveness of the proposed approaches.

关键词： Model predictive control Process systems Stability Recursive feasibility Uncertainty Norm-bounding technique

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Robust MVDR beamforming based on covariance matrix reconstruction

引用

Science China(Information Sciences) 2013年第4期56卷 28-39页

作者： MU PengCheng LI Dan YIN QinYe GUO Wei ministry of education key lab for intelligent networks and network security School of Electronics and Information EngineeringXi'an Jiaotong University

The minimum variance distortionless response(MVDR) beamformer has better resolution and much better interference rejection capability than the data-independent ***,the former is more sensitive to errors,such as the steering vector errors caused by direction of arrival mismatch,imprecise array calibration or any other possible factors,especially in the case of high signal-to-noise ratio(SNR).A new robust MVDR beamformer against the general steering vector errors is proposed in this *** method is based on the reconstruction of the covariance matrix which aims to reduce the power of the signal of interest(SOI) in the covariance *** eigenanalysis is used in the process of removing the SOI component and modifying the residual covariance *** results show that the proposed method has excellent signal-to-interference-plus-noise ratio(SINR) performance under the mismatch condition.

关键词： MVDR beamforming steering vector error eigenanalysis covariance matrix reconstruction signal-to-interference-plus-noise ratio

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

An efficient ranging method based on Chinese remainder theorem for RIPS measurement

引用

Science China(Information Sciences) 2010年第6期53卷 1233-1241页

作者： WANG Chen , YIN QinYe & WANG WenJie ministry of education key lab for intelligent networks and network security, Xi’an Jiaotong University, Xi’an 710049, China ministry of education key lab for intelligent networks and network security Xi’an Jiaotong University Xi’an China

The radio interferometric positioning system(RIPS) measures the phase difference of the interference signal to provide high accuracy and at the same time maintain simple hardware configuration for wireless sensor ***, it suffers from phase ambiguity problem because of the periodicity of phase, which makes it hard to determine the actual distance difference only from a single phase *** solve the problem, RIPS makes multiple measurements at different frequencies so as to determine the distance difference from multiple ***, this is a computationally intensive searching process and not suitable for energyconstrained wireless sensor *** this paper, we introduce the Chinese remainder theorem(CRT) to RIPS to solve the phase ambiguity ***, we utilize some properties of the coefficients in the CRT algorithm to avoid the over-sensitivity of the traditional CRT, which increases the robustness of the *** apply this robust CRT algorithm to the ranging process which calculates the distance difference directly from a closed-form equation and therefore reduces the response time and the energy consumption of the ranging procedure.

关键词： ranging phase ambiguity Chinese remainder theorem robustness energy efficiency wireless sensor networks

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Beamforming based decode-and-forward cooperation via backward synchronization

引用

Science China(Information Sciences) 2012年第4期55卷 805-814页

作者： LI YuBo,YIN QinYe & WANG Chen ministry of education key lab for intelligent networks and network security,Xi’an Jiaotong University,Xi’an 710049,China ministry of education key lab for intelligent networks and network security Xi’an Jiaotong University Xi’an China

In this paper,a beamforming (BF) based cooperation scheme with decode-and-forward (DF) protocol is proposed and its performance analysis is ***,to solve the issue of carrier synchronization in distributed networks,a backward synchronization (B-Sync) method is introduced,where participating relays synchronize to the reference carrier broadcast by the destination and make signals superimposed coherently at the destination without any phase ***,based on B-sync,a cooperation scheme with DF protocol is proposed to carry out BF forwarding among *** outage probability of this scheme is derived and analyzed,which shows that the full diversity order can be achieved by the proposed ***,symbol error probability (SEP) analysis is presented to evaluate the practical *** results validate the analysis,and show that the proposed scheme outperforms other existing ones in terms of outage probability and SEP.

关键词： cooperative diversity distributed beamforming outage probability symbol error probability decode-and-forward

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Outage-optimal relaying through opportunistic hybrid forward cooperation

引用

Science China(Information Sciences) 2011年第6期54卷 1264-1273页

作者： LI YuBo , YIN QinYe & WANG JunSong ministry of education key lab for intelligent networks and network security, Xi’an Jiaotong University, Xi’an 710049, China ministry of education key lab for intelligent networks and network security Xi’an Jiaotong University Xi’an China

In this paper, a new scheme based on relay selection and data forwarding in multi-relay cooperative networks is introduced. Unlike most existing solutions focused on amplify-and-forward (AF) or decode-and-forward (DF) protocol separately, the proposed hybrid forward (HF) scheme takes advantage of both AF and DF protocols in relay forwarding. Based on theoretical analysis, a closed-form expression for the tight lower bound of its outage probability is derived, and further performance analysis is also presented. Then, in total power restricted networks, an optimal power allocation strategy between the source and the selected relay is developed to minimize the outage probability. Simulations are carried out finally, which validate the analysis and show that the HF scheme outperforms other existing ones in terms of outage probability.

关键词： cooperative diversity opportunistic cooperation outage probability power allocation diversity-multiplexing-tradeoff

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A Study on Influential User Identification in Online Social networks

引用

Chinese Journal of Electronics 2016年第3期25卷 467-473页

作者： WANG Nan SUN Qindong ZHOU Yadong SHEN Si Shaanxi key laboratory of network Computing and security Xi'an University of Technology ministry of education key laboratory For intelligent network and network security Xi'an Jiaotong University

Influential user evaluation is great importance in many application areas of online social *** order to identify influential users in a more adequate and practical way, we propose a Dynamic regional interaction model(DRI) to evaluate user influence in online social networks. Influential users can be identified by the influence effect on different distance users based on dynamic regional interaction model. We have applied the influential user identification method to Sina Weibo and the experimental results show that compared with the existing methods the proposed method can identify the influence users in a more accuracy and efficiency way.

关键词： Online social networks Influential user identification Dynamic regional interaction model(DRI) User influence evaluation

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A Wind Power Time Series Modeling Method Based on Stochastic Burgers Equation 36

A Wind Power Time Series Modeling Method Based on Stochastic...

引用

第36届中国控制会议

作者： Xie Dong Wu Jiang Song Feilong Liu Weisheng ministry of education key lab for intelligent networks and network security Xi’an Jiaotong University

ISBN: (纸本)9781538629185

With more wind power integrating into power grid,a lot of issues are caused by its uncertainty and *** order to analysis wind characters,this paper proposes a method to model wind *** method bases on stochastic Burgers *** turns wind power model from three dimension to one dimension in order to simplify the physical model and generate more wind speed data to improve *** uses Gaussian distribution to fit the *** uses the Park model to calculate the wake *** it turns the wind speed data to wind power ***,the scheme is applied to a 30-turbines case.

关键词： wind power stochastic Burgers equation Park model

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Robust Transmission Capacity Margin Evaluation Based on All-Scenario-Feasible Optimization 36

Robust Transmission Capacity Margin Evaluation Based on All-...

引用

第36届中国控制会议

作者： Weisheng Liu Xiaohong Guan Jiang Wu Feilong Song Dong Xie ministry of education key lab for intelligent networks and network security Xi’an Jiaotong University

ISBN: (纸本)9781538629185

A robust and effective evaluation method for the safety of optimal generation scheduling has great potential on optimizing operation of electrical power and energy *** on the concept of transmission capacity margin,a robust model of transmission capacity margin evaluation（TCME） is established to assess the overload risk of transmission lines when loads *** TCME method can provide the system operators with useful information such as possibly overloaded lines and time periods when lines are potentially overloaded under the uncertainties of nodal ***,TCME formulation has a multi-level（min-max） structure and the solution methods are usually *** order to overcome the computational complexity of original problem,an All-Scenario-Feasible optimization is *** is established based on very limited scenarios while the solution is feasible to all *** proposed formulation is single-level rather than *** no iterative algorithms are needed and commercial solver like CPLEX could be directly *** order to use the proposed formulation for large-scale power grid,considering that the transmission capacity constraint is the most important one in all problem constraints,we further reduce the number of *** testing is also performed and the results show that the proposed formulation is effective.

关键词： robust transmission capacity margin All-Scenario-Feasible

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

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：