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Measure of riskiness based on RDEU model 基于RDEU模型的风险度量
中国科学技术大学学报 Pub Date : 2021-05-27 DOI: 10.52396/JUST-2021-0012
Guo Chuanfeng, Du Xinze, Wu Qinyu, Ma Tiantian
{"title":"Measure of riskiness based on RDEU model","authors":"Guo Chuanfeng, Du Xinze, Wu Qinyu, Ma Tiantian","doi":"10.52396/JUST-2021-0012","DOIUrl":"https://doi.org/10.52396/JUST-2021-0012","url":null,"abstract":"","PeriodicalId":17548,"journal":{"name":"中国科学技术大学学报","volume":"52 4","pages":"65"},"PeriodicalIF":0.0,"publicationDate":"2021-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72371572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-path switching protection for networked control systems under unbounded DoS attacks 网络控制系统在无界DoS攻击下的多路径切换保护
中国科学技术大学学报 Pub Date : 2021-05-27 DOI: 10.52396/JUST-2020-1137
Zhu Qiaohui, Liang Qipeng, Kang Yu, Zhao Yunbo
{"title":"Multi-path switching protection for networked control systems under unbounded DoS attacks","authors":"Zhu Qiaohui, Liang Qipeng, Kang Yu, Zhao Yunbo","doi":"10.52396/JUST-2020-1137","DOIUrl":"https://doi.org/10.52396/JUST-2020-1137","url":null,"abstract":"The strategy design and closed-loop stability of networked control systems under unbounded denial of service (DoS) attacks are probed. A multi-path switching protection strategy is firstly designed by noticing the usually available multiple paths in data communication networks. The strategy consists of a DoS attack detection module at the actuator side to identify DoS attacks from normal data packet dropouts, and a multi-path switching module at the sensor side to effectively switch the data transmission path when necessary. Then, the sufficient conditions for the closed-loop system being global mean square asymptotic stability are given, with a corresponding controller gain design method. Numerical examples illustrate the effectiveness of the proposed approach.","PeriodicalId":17548,"journal":{"name":"中国科学技术大学学报","volume":"47 1","pages":"22"},"PeriodicalIF":0.0,"publicationDate":"2021-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72927012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A cognitive diagnostic framework for computer science education based on probability graph model 基于概率图模型的计算机科学教育认知诊断框架
中国科学技术大学学报 Pub Date : 2021-05-27 DOI: 10.52396/JUST-2020-0007
Huang Xinying, He Yu, Sun Guangzhong
{"title":"A cognitive diagnostic framework for computer science education based on probability graph model","authors":"Huang Xinying, He Yu, Sun Guangzhong","doi":"10.52396/JUST-2020-0007","DOIUrl":"https://doi.org/10.52396/JUST-2020-0007","url":null,"abstract":"","PeriodicalId":17548,"journal":{"name":"中国科学技术大学学报","volume":"64 1","pages":"12"},"PeriodicalIF":0.0,"publicationDate":"2021-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89760597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Corporate resistance to pandemic: Evidence from china 企业对流行病的抵抗力:来自中国的证据
中国科学技术大学学报 Pub Date : 2021-04-30 DOI: 10.52396/JUST-2021-0070
L. Tingfang, W. Xiao
{"title":"Corporate resistance to pandemic: Evidence from china","authors":"L. Tingfang, W. Xiao","doi":"10.52396/JUST-2021-0070","DOIUrl":"https://doi.org/10.52396/JUST-2021-0070","url":null,"abstract":"Based on the quarterly data of A-share listed firms between 2019 and 2020, we find that firms with lower leverage and higher cash holdings before perform better under the COVID-19 pandemic, suggesting that strong liquidity helps firms resist risks. In particular, cash holding affects firm performance through the channel of production. Secondly, we calculate firms’ position in the global value chain based on a world input-output table and find that downstream firms perform better under the pandemic. Thirdly, to cope with future uncertainty, cash-holding willingness of firms increases significantly after the pandemic. All findings imply that firms need to improve their financial health to be more resilient toward negative shocks and policy makers need to improve the financial environment to satisfy firms’ external financing need. © 2021, Editorial Department of Journal of University of Science and Technology of China. All rights reserved.","PeriodicalId":17548,"journal":{"name":"中国科学技术大学学报","volume":"17 1","pages":"288-298"},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81591296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
MOVIE: Mesh oriented video inpainting network 电影:面向网格的视频绘画网络
Journal of University of Science and Technology of China Pub Date : 2021-01-31 DOI: 10.52396/JUST-2020-0022
Liu Sen, Zhan Zhizheng, Yu Tao, Chen Zhibo
{"title":"MOVIE: Mesh oriented video inpainting network","authors":"Liu Sen, Zhan Zhizheng, Yu Tao, Chen Zhibo","doi":"10.52396/JUST-2020-0022","DOIUrl":"https://doi.org/10.52396/JUST-2020-0022","url":null,"abstract":"","PeriodicalId":17548,"journal":{"name":"Journal of University of Science and Technology of China","volume":"22 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73142029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of personal carbon trading on EV adoption behavior based on a stochastic Petri net 基于随机Petri网的个人碳交易对电动汽车采用行为的影响
中国科学技术大学学报 Pub Date : 2021-01-31 DOI: 10.52396/JUST-2020-0024
He Haonan, Ren Wei, Wang Zuohang, Zhao Chenyong, Wang Shanyong, Ma Fei
{"title":"Effect of personal carbon trading on EV adoption behavior based on a stochastic Petri net","authors":"He Haonan, Ren Wei, Wang Zuohang, Zhao Chenyong, Wang Shanyong, Ma Fei","doi":"10.52396/JUST-2020-0024","DOIUrl":"https://doi.org/10.52396/JUST-2020-0024","url":null,"abstract":"","PeriodicalId":17548,"journal":{"name":"中国科学技术大学学报","volume":"52 1","pages":"53"},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84419930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Subgroup analysis for multi-response regression 多响应回归的亚组分析
Journal of University of Science and Technology of China Pub Date : 2021-01-01 DOI: 10.52396/just-2021-0053
Wu Jie, Z. Jia, Zheng Zemin
{"title":"Subgroup analysis for multi-response regression","authors":"Wu Jie, Z. Jia, Zheng Zemin","doi":"10.52396/just-2021-0053","DOIUrl":"https://doi.org/10.52396/just-2021-0053","url":null,"abstract":": Correctly identifying the subgroups in a heterogeneous population has gained increasing popularity in modern big data applications since studying the heterogeneous effect can eliminate the impact of individual differences and make the estimation results more accurate. Despite the fast growing literature , most existing methods mainly focus on the heterogeneous univariate regression and how to precisely identify subgroups in face of multiple responses remains unclear. Here , we develop a new methodology for heterogeneous multi-response regression via a concave pairwise fusion approach , which estimates the coefficient matrix and identifies the subgroup structure jointly. Besides , we provide theoretical guarantees for the proposed methodology by establishing the estimation consistency. Our numerical studies demonstrate the effectiveness of the proposed method.","PeriodicalId":17548,"journal":{"name":"Journal of University of Science and Technology of China","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88240174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An end-to-end multitask method with two targets for high-frequency price movement prediction 基于两个目标的端到端多任务高频价格运动预测方法
Journal of University of Science and Technology of China Pub Date : 2021-01-01 DOI: 10.52396/just-2021-0052
Yulian Ma, Wenquan Cui
{"title":"An end-to-end multitask method with two targets for high-frequency price movement prediction","authors":"Yulian Ma, Wenquan Cui","doi":"10.52396/just-2021-0052","DOIUrl":"https://doi.org/10.52396/just-2021-0052","url":null,"abstract":": High-frequency price movement prediction is to predict the direction ( e. g. up , unchanged or down ) of the price change in short time ( e. g. one minute ) . It is challenging to use historical high-frequency transaction data to predict price movement because their relation is noisy , nonlinear and complex. We propose an end-to-end multitask method with two targets to improve high-frequency price movement prediction. Specifically , the proposed method introduces an auxiliary target ( high-frequency rate of price change ), which is highly related with the main target ( high-frequency price movement ) and is useful to improve the high-frequency price movement prediction. Moreover , each task has a feature extractor based on recurrent neural network and convolutional neural network to learn the noisy , nonlinear and complex temporal-spatial relation between the historical transaction data and the two targets. Besides , the shared parts and task-specific parts of each task are separated explicitly to alleviate the potential negative transfer caused by the multitask method. Moreover , a gradient balancing approach is adopted to use the close relation between two targets to filter the temporal-spatial dependency learned from the inconsistent noise and retain the dependency learned from the consistent true information to improve the high-frequency price movement prediction. The experimental results on real-world datasets show that the proposed method manages to utilize the highly related auxiliary target to help the feature extractor of the main task to learn the temporal-spatial dependency with more generalization to improve high-frequency price movement prediction. Moreover , the auxiliary target ( high-frequency rate of the price change ) not only improves the generalization of overall temporal-spatial dependency learned by the whole feature extractor but also improve temporal-spatial dependency learned by the different parts of the feature extractor.","PeriodicalId":17548,"journal":{"name":"Journal of University of Science and Technology of China","volume":"161 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77210629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An ultra-fast C-NOT gate based on electric dipole coupling between nitrogen-vacancy color centers 基于氮空位色心电偶极子耦合的超高速C-NOT栅
中国科学技术大学学报 Pub Date : 2021-01-01 DOI: 10.52396/just-2020-0039
Shunyang Shi, Wentao Ji, Wang Ya, Jiangfeng Du
{"title":"An ultra-fast C-NOT gate based on electric dipole coupling between nitrogen-vacancy color centers","authors":"Shunyang Shi, Wentao Ji, Wang Ya, Jiangfeng Du","doi":"10.52396/just-2020-0039","DOIUrl":"https://doi.org/10.52396/just-2020-0039","url":null,"abstract":": Our research proposes a new scheme to build a controlled-NOT ( C-NOT ) gate between two adjacent nitrogen-vacancy ( NV ) color centers in diamond , using electric dipole coupling between adjacent NVs and selective resonant laser excitation. The electric dipole coupling between two NVs causes the state dependent energy shift. This allows to apply resonant laser excitation to realize the C-phase gate. Combined with a single qubit operation , C-NOT gate can be implemented quickly. Between two adjacent 10 nm NVs , the C-NOT gate can operate up to 120 ns faster than the traditional magnetic dipole coupling method by 2 magnitudes. In order to reduce the effect of a spontaneous emission , we propose to use a non-resonant cavity to suppress the spontaneous emission. The simulation results show that the C-phase gate fidelity can reach 98 . 88 % . Finally , the scheme is extended to a one-dimensional NV spin chain.","PeriodicalId":17548,"journal":{"name":"中国科学技术大学学报","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75557428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hyperplane arrangement complement with top degree Betti number being small 上次Betti数小的超平面排列补
中国科学技术大学学报 Pub Date : 2021-01-01 DOI: 10.52396/just-2020-1119
Liang Fenglin
{"title":"Hyperplane arrangement complement with top degree Betti number being small","authors":"Liang Fenglin","doi":"10.52396/just-2020-1119","DOIUrl":"https://doi.org/10.52396/just-2020-1119","url":null,"abstract":": The deletion-restriction method was used to classify hyperplane arrangements with the top degree Betti number of its complements being small.","PeriodicalId":17548,"journal":{"name":"中国科学技术大学学报","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87828871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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