检索结果-南通市图书馆

Weapon-target assignment in unreliable peer-to-peer architecture based on adapted artificial bee colony algorithm

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2022年第1期16卷 23-31页

作者： Xiaolong LIU Jinchao LIANG De-Yu LIU riqing chen Shyan-Ming YUAN College of Computer and Information Sciences Digital Fujian Institute of Big Data for Agriculture and ForestryFujian Agriculture and Forestry UniversityFuzhou350002China Department of Computer Science Chiao Tung UniversityHsinchu300China

It is of great significance for headquarters in warfare to address the weapon-target assignment(WTA)problem with distributed computing nodes to attack targets simultaneously from different weapon ***,the computing nodes on the battlefield are vulnerable to be attacked and the communication environment is usually *** solve the WTA problems in unreliable environments,this paper proposes a scheme based on decentralized peer-to-peer architecture and adapted artificial bee colony(ABC)optimization *** the decentralized architecture,the peer computing node is distributed to each weapon units and the packet loss rate is used to simulate the unreliable communication *** decisions made in each peer node will be merged into the decision set to carry out the optimal decision in the decentralized system by adapted ABC *** experimental results demonstrate that the decentralized peer-to-peer architecture perform an extraordinary role in the unreliable communication *** proposed scheme preforms outstanding results of enemy residual value(ERV)with the packet loss rate in the range from 0 to 0.9.

关键词： weapon-target assignment(WTA) peer-to-peer heuristic algorithm artificial bee colony(ABC)

High-Performance Beamformer and Low-Complexity Detector for DF-Based Full-Duplex MIMO Relaying Networks

在线全文

学校读者我要写书评

暂无评论

China Communications 2017年第2期14卷 173-182页

作者： Feng Shu Ye Zhou riqing chen Jin Wang Jun Li Branka Vucetic College of Computer and Information Sciences Fujian Agriculture and Forestry University Fuzhou 350002 China School of Mobile Network Nanjing Technology University Pujiang Institute Nanjing 21134 China School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing 210094 China National Mobile Communications Research Laboratory Southeast University Nanjing 210096 China School of Electrical and Information Engineering the University of Sydney NSW Australia

In this paper, we consider a *** *** ***(MIMO) relaying network with the ***(DF) protocol. Due to the *** transmissions, the *** from the relay transmitter to the relay receiver degrades the system performance. We thus propose an iterative beamforming structure(IBS) to mitigate the ***. In this method, the receive beamforming at the relay is optimized to maximize the ***(***), while the transmit beamforming at the relay is optimized to maximize the ***(***). To further improve the performance, the receive and transmit beamforming matrices are optimized between *** and *** in an iterative manner. Furthermore, in the presence of the residual ***, a *** ***(WF) maximum likelihood(ML) detector is proposed. In this detector, a WF is designed to transform a colored *** to a white noise, while the singular value decomposition is used to convert coupled spatial subchannels to parallelindependent ones. From simulations, we find that the proposed IBS performs much better than the existing schemes. Also, the proposed *** detector significantly reduces the complexity of the conventional ML(CML) detector from exponential time(an exponential function of the number of the source transmit antennas) to polynomial one while achieving a slightly better BER performance than the CML due to interference whitening.

关键词： decoding-and-forward MIMO relay full-duplex self-interference iterative beamforming

Panicle-Cloud:An Open and Al-Powered Cloud Computing Platform for Quantifying Rice Panicles from Drone-Collected Imagery to Enable the Classification of Yield Production in Rice

在线全文

学校读者我要写书评

暂无评论

Plant Phenomics 2023年第4期5卷 905-916页

作者： Zixuan Teng Jiawei chen Jian Wang Shuixiu Wu riqing chen Yaohai Lin Liyan Shen Robert Jackson Ji Zhou Changcai Yang Digital Fujian Research Institute of Big Data for Agriculture and Forestry College of Computer and Information SciencesFujian Agriculture and Forestry UniversityFuzhou 350002China State Key Laboratory of Crop Genetics&Germplasm Enhancement academy for Advanced Interdisciplinary StudiesNanjing Agricultural UniversityNanjing 210095China Ningxia Academy of Agriculture and Forestry Sciences Yinchuan 750002China College of Mechanical and Electrical Engineering Fujian Agriculture and Forestry UniversityFuzhou 350002China Cambridge Crop Research National Institute of Agricultural Botany(NIAB)Cambridge CB3 OLEUK Key Laboratory of Smart Agriculture and Forestry(Fujian Agriculture and Forestry University) Fujian Province UniversityFuzhou 350002China Center for Agroforestry Mega Data Science School of Future TechnologyFujian Agriculture and Forestry UniversityFuzhou 350002China

Rice(Oryza sativa)is an essential stable food for many rice consumption nations in the world and,thus,the importance to improve its yield production under global climate *** evaluate different rice varieties'yield performance,key yield-related traits such as panicle number per unit area(PNpM^(2))are key indicators,which have attracted much attention by many plant research ***,it is still challenging to conduct large-scale screening of rice panicles to quantify the PNpM^(2)trait due to complex field conditions,a large variation of rice cultivars,and their panicle morphological ***,we present Panicle-Cloud,an open and artificial intelligence(AI)-powered cloud computing platform that is capable of quantifying rice panicles from drone-collected *** facilitate the development of Al-powered detection models,we first established an open diverse rice panicle detection dataset that was annotated by a group of rice specialists;then,we integrated several state-of-the-art deep learning models(including a preferred model called Panicle-AI)into the Panicle-Cloud platform,so that nonexpert users could select a pretrained model to detect rice panicles from their own aerial *** trialed the Al models with images collected at different attitudes and growth stages,through which the right timing and preferred image resolutions for phenotyping rice panicles in the field were ***,we applied the platform in a 2-season rice breeding trial to valid its biological relevance and classified yield production using the platform-derived PNpM^(2)trait from hundreds of rice *** correlation analysis between computational analysis and manual scoring,we found that the platform could quantify the PNpM^(2)trait reliably,based on which yield production was classified with high ***,we trust that our work demonstrates a valuable advance in phenotyping the PNpM^(2)trait in rice,which provides a useful toolkit to enable rice br

关键词： breeding cultivar hundreds

A Method for Normal Direction Judge Applied in Electrocardiographic Problem

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Biosciences and Medicines 2018年第1期6卷 1-8页

作者： chengcheng Tang Jian Wu riqing chen Department of Biomedical Engineering Tsinghua University Beijing China

Boundary Element Method (BEM) is widely used in electrocardiographic (ECG) problem. Formulations of these problems based on mathematical and numerical approximations of the known source in heart and the volume conductor that can transfer voltages on the surface of the body. To analyze the electric potentials on body surface or epicardial surface, a set of discrete equations derived from a boundary integral equations need to be solved. Solving these equations means to get the potential distribution eventually. In the process of solving, transfer matrix of discrete equations has received considerable attention, how to get an appropriate transfer matrix is an important issue. This paper found that the direction of normal vector could affect the results when calculating the transfer matrix and presents a method analogous to Mesh Current Method to deal with this direction problem. Several simulations have been carried out to verify the accurate results with the correct direction of normal vector using new method within a torso model given simultaneous epicardial and body surface potential recordings.

关键词： ECG Problem BEM Transfer Matrix Normal Vector Direction

Beamforming design for RIS-aided amplify-and-forward relay networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2023年第12期24卷 1728-1738页

作者： Xuehui WANG Feng SHU riqing chen Peng ZHANG Qi ZHANG Guiyang XIA Weiping SHI Jiangzhou WANG School of Information and Communication Engineering Hainan UniversityHaikou570228China School of Electronic and Optical Engineering Nanjing University of Science and TechnologyNanjing210094China Digital Fujian Institute of Big Data for Agriculture Fujian Agriculture and Forestry UniversityFuzhou350002China Institute of Intelligent Agriculture Anhui Agricultural UniversityHefei230036China School of Engineering University of KentCanterburyCT27NTUK

The use of a reconfigurable intelligent surface(RIS)in the enhancement of the rate performance is considered to involve the limitation of the RIS being a passive *** address this issue,we propose a RIS-aided amplify-and-forward(AF)relay network in this *** jointly optimizing the beamforming matrix at AF relay and the phase-shift matrices at RIS,two schemes are put forward to address a maximizing signal-to-noise ratio(SNR)***,aiming at achieving a high rate,a high-performance alternating optimization(AO)method based on Charnes–Cooper transformation and semidefinite programming(CCT-SDP)is proposed,where the optimization problem is decomposed into three subproblems solved using CCT-SDP,and rank-one solutions can be recovered using Gaussian ***,the optimization variables in the CCT-SDP method are matrices,leading to extremely high *** reduce the complexity,a low-complexity AO scheme based on Dinkelbachs transformation and successive convex approximation(DT-SCA)is proposed,where the variables are represented in vector form,and the three decoupling subproblems are solved using *** results verify that compared to three benchmarks(i.e.,a RIS-assisted AF relay network with random phase,an AF relay network without RIS,and a RIS-aided network without AF relay),the proposed CCT-SDP and DT-SCA schemes can harvest better rate ***,it is revealed that the rate of the low-complexity DT-SCA method is close to that of the CCT-SDP method.

关键词： Reconfigurable intelligent surface(RIS) Amplify-and-forward(AF)relay Beamforming Phase shift Semidefinite programming Successive convex approximation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国货币政策对房地产市场的非对称效应

统计研究 2014年第6期31卷 33-41页

作者：陈日清东北财经大学金融学院应用金融研究中心

本文基于国房景气指数及马尔科夫区制转换模型,研究了中国货币政策对房地产市场的影响。研究发现,中国货币政策对房地产市场影响存在非对称效应:一是货币政策在房地产市场处于"平稳期"时,对房地产市场几乎没有作用,但是在房地产市场处于... 详细信息

本文基于国房景气指数及马尔科夫区制转换模型,研究了中国货币政策对房地产市场的影响。研究发现,中国货币政策对房地产市场影响存在非对称效应:一是货币政策在房地产市场处于"平稳期"时,对房地产市场几乎没有作用,但是在房地产市场处于"上行期"和"下行期"时作用明显;二是预期货币政策变动对房地产市场具有预期调控作用,非预期货币政策变动则会弱化货币政策的预期调控作用,因此,具有一定规则、平稳可预期的货币政策将有助于维护我国房地产市场健康平稳发展。另外,现阶段适宜的房地产市场调控货币政策中介目标为货币供应量,而利率对房地产市场的调控作用可能有限。

关键词：货币政策中国房地产市场马尔科夫区制转换模型非对称效应国房景气指数

H∞ Time-Varying Formation Control of Multiple Spacecraft System

在线全文

学校读者我要写书评

暂无评论

H∞ Time-Varying Formation Control of Multiple Spacecraft Sy...

机构投资者与个人投资者过度自信行为比较研究

第37届中国控制会议

作者： ZHOU Ning chen riqing HUANG Jie WEN Guoxing College of Computer and Information Sciences Fujian Agriculture and Forestry University College of Electrical Engineering and Automation Fuzhou University College of Science Binzhou University

This paper discusses the problem of time-varying formation control for multiple spacecraft while achieving H performance. Firstly, an elaborate formation task function is designed by using estimator-based null-space based behavioral control method, and a predesigned desired velocity is calculated for each spacecraft. Then by employing backstepping technique associated with the universal approximation property of radial basis function neural networks(RBFNN), an adaptive H coordination control scheme is presented to drive all the spacecraft to implement the time-varying formation task in switching communication graph. Finally, rigorous theoretical analysis shows that the proposed algorithm implements the time-varying formation task successfully with H performance.

关键词： Time-Varying Formation H∞ Control Neural Networks Control Spacecraft System

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

投资研究 2011年第12期30卷 25-37页

作者：陈日清东北财经大学金融学院

本文首先基于我国A股市场机构股票持有数据,构建了不同的投资组合来区分机构投资者与个人投资者的投资行为。然后运用Granger因果检验与SUR估计,探讨了我国证券市场机构投资者与个人投资者是否具有过度自信行为,结果表明无论是机构投资... 详细信息

本文首先基于我国A股市场机构股票持有数据,构建了不同的投资组合来区分机构投资者与个人投资者的投资行为。然后运用Granger因果检验与SUR估计,探讨了我国证券市场机构投资者与个人投资者是否具有过度自信行为,结果表明无论是机构投资者还是个人投资者在不同市场状态下都存在交易过多的过度自信认知偏差。并且我国证券市场上个人投资者与机构投资者的过度自信程度在不同的市场状态下并无明显差异。最后提出了相关政策建议。

关键词：过度自信机构投资者个人投资者

在线全文

学校读者我要写书评

暂无评论

大股东权力对我国上市公司业绩的影响研究

系统工程理论与实践 2020年第10期40卷 2505-2518页

作者：陈日清王彤彤史永东东北财经大学金融学院大连116025 东北财经大学应用金融与行为科学学院大连116025

本文以2003-2016年中国沪深上市公司为研究样本,采用基于合作博弈理论的Shapley权力指数测度第一大股东权力水平,考察了大股东权力对公司业绩的影响.研究发现:1)大股东权力水平对公司业绩有显著的促进作用,大股东权力水平的提高有利于... 详细信息

本文以2003-2016年中国沪深上市公司为研究样本,采用基于合作博弈理论的Shapley权力指数测度第一大股东权力水平,考察了大股东权力对公司业绩的影响.研究发现:1)大股东权力水平对公司业绩有显著的促进作用,大股东权力水平的提高有利于公司业绩的提升;2)大股东存在"更少掏空效应",即权力水平提升抑制了大股东掏空行为,有效提高了公司业绩;3)大股东存在"监督效应",即权力水平升高增加了大股东监督经理人的动力,缓解了代理问题,改善了公司的经营业绩;4)进一步的研究显示,大股东权力对公司业绩的提升作用在非国有企业中更强,同时大股东权力的提高有利于市场业绩的提升、业绩风险的降低以及长期业绩的提升.本文较为全面地从大股东权力的视角展现了所有权结构对公司业绩的影响,有助于理解中国背景下所有权结构与公司业绩的真实关系.

关键词：大股东权力 Shapley权力指数掏空效应监督效应公司业绩