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Confidentiality-aware message scheduling for security-critical wireless networks

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Journal of Systems Engineering and Electronics 2010年第1期21卷 154-160页

作者： Wei jiang Guangze Xiong xuyang Ding Zhengwei Chang Nan Sang College of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 610054 E R. China

Without considering security, existing message scheduling mechanisms may expose critical messages to malicious threats like confidentiality attacks. Incorporating confidentiality improvement into message scheduling, this paper investigates the problem of scheduling aperiodc messages with time-critical and security-critical requirements. A risk-based security profit model is built to quantify the security quality of messages; and a dynamic programming based approximation algorithm is proposed to schedule aperiodic messages with guaranteed security performance. Experimental results illustrate the efficiency and effectiveness of the proposed algorithm.

关键词： security-critical wireless networks confidentialityaware real-time message scheduling.

An Effective Method of Prompting Juvenile Rainbow Trout (Oncorhynchus mykiss) to Cope with Heat Stress

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Journal of Ocean University of China 2020年第1期19卷 216-224页

作者： jiang xuyang DONG Shuanglin ZHOU Yangen GAO Qinfeng PAN Zhe Key Laboratory of Mariculture of Ministry of Education Ocean University of ChinaQingdao 266100China Function Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266235China

In the present study,juvenile rainbow trout(Oncorhynchus mykiss)were acclimated at 5 *** in the control group(C0)were reared at a constant temperature(16℃);trout in four other treatments(A0,A3,A6,and A9)were acclimated to a high temperature(22℃)for 0,3,6,and 9 d,respectively,and then returned to normal temperature(16℃)for *** temperature was then raised to 20℃and the fish were cultured for 40 *** results showed that the growth rates of A3,A6,and A9 were higher than that of A0 but lower than that of *** growth rate of A9 was the highest among the 4 acclimation *** activities of serum transaminase and liver antioxidant enzyme significantly increased during *** the beginning of growth,the activities of enzymes were lower in A3,A6,and A9 with the lowest in *** addition,the transcript abundance of heat shock protein(HSP)60 gene in A9 was not significantly different from that of C0 during ***70 in A9 significantly increased at the beginning and returned to that of C0 at the *** findings indicated that pre-acclimation improved the high temperature tolerance with the best effectiveness observed at 22℃for 9 d.A possible mechanism underlining such phenomenon is the improvement of antioxidant defense system.

关键词： temperature acclimation enzyme activity growth performance heat shock protein rainbow trout

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基于模型预测的双电机驱动系统协调控制方法

中国电机工程学报 2022年第23期42卷 8740-8749页

作者：石欢孙乐李志刚常皓姜旭阳南京理工大学江苏省南京市210094 中国人民解放军32382部队湖北省武汉市430300

该文提出一种基于双电机驱动的伺服方案,以解决摇臂系统传动齿隙引起的问题。齿隙问题的本质是齿轮侧隙降低了等效系统刚度,进而导致负载自激振荡,这在该文的实验中得到证实。双电机驱动的拓扑结构不仅具有结构紧凑、对称的优点,而且还... 详细信息

该文提出一种基于双电机驱动的伺服方案,以解决摇臂系统传动齿隙引起的问题。齿隙问题的本质是齿轮侧隙降低了等效系统刚度,进而导致负载自激振荡,这在该文的实验中得到证实。双电机驱动的拓扑结构不仅具有结构紧凑、对称的优点,而且还为改善重型摇臂伺服系统性能提供了契机。基于双电机控制系统,在其中2个电机的电流参考指令中注入一个抵消侧隙影响的协调分量,以增强系统刚度,进而抑制到位震荡。在振动抑制的基础上,才能提高伺服系统的动态响应性能。该文采用模型预测控制(model predictive control,MPC)来改善系统的动态性能,使得电机转速响应更快、更准确,尤其在低速的情况下,精确的转速控制直接提高了伺服定位精度。该文通过对比研究,展示了该控制方案的优点。通过仿真对所提出的策略进行研究,并在由永磁同步电机(permanent magnet synchronous motors,PMSM)构成的实验台上对所提方案的控制效果进行验证。

关键词：协调控制双电机驱动模型预测永磁同步电机摇臂机构传动间隙

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某火炮药协调臂系统位置控制研究

兵器装备工程学报 2022年第3期43卷 119-124页

作者：姜旭阳李志刚石欢南京理工大学机械工程学院南京210094

针对存在时变性扰动的药协调臂机电伺服系统,提出了一种基于干扰观测器的自适应滑模变结构控制策略,系统中的未建模动态可以被扰动观测器有效地在线跟踪并进行补偿。设计了滑模控制器消除观测到的扰动项所造成的误差,确保了控制系统的... 详细信息

针对存在时变性扰动的药协调臂机电伺服系统,提出了一种基于干扰观测器的自适应滑模变结构控制策略,系统中的未建模动态可以被扰动观测器有效地在线跟踪并进行补偿。设计了滑模控制器消除观测到的扰动项所造成的误差,确保了控制系统的收敛性与稳定性。针对滑模控制抖振严重这一现象,根据切换项系数设计了自适应律,极大地减小了系统控制量的抖振。仿真实验结果表明,在1块药装填、6块药装填2种极端工况下,该控制策略具有较好的动态跟踪性能和鲁棒性。

关键词：药协调臂干扰观测器趋近律滑模控制自适应律

Cr: LiNbO3 Planar Waveguide

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Chinese Journal of Lasers 1995年第4期B4卷 355-359页

作者： ZHU Shengxiang jiang xuyang QIU Yuanwu(Pohl Institute,Tongji University, shanghai 200092)WU Yongjian XU Zhengquan(Physics Department, Jiaotong University,Shanghai 200052) Tongji Univ Shanghai China

Ｃｒ：ＬｉＮｂＯ３ＰｌａｎａｒＷａｖｅｇｕｉｄｅ￥ＺＨＵＳｈｅｎｇｘｉａｎｇ；ＪＩＡＮＧＸｕｙａｎｇ；ＱＩＵＹｕａｎｗｕ（ＰｏｈｌＩｎｓｔｉｔｕｔｅ，ＴｏｎｇｊｉＵｎｉｖｅｒｓｉｔｙ，ｓｈａｎｇｈａｉ２０００９２）Ｗ... 详细信息

Ｃｒ：ＬｉＮｂＯ３ＰｌａｎａｒＷａｖｅｇｕｉｄｅ￥ＺＨＵＳｈｅｎｇｘｉａｎｇ；ＪＩＡＮＧＸｕｙａｎｇ；ＱＩＵＹｕａｎｗｕ（ＰｏｈｌＩｎｓｔｉｔｕｔｅ，ＴｏｎｇｊｉＵｎｉｖｅｒｓｉｔｙ，ｓｈａｎｇｈａｉ２０００９２）ＷＵＹｏｎｇｊｉａｎ；ＸＵＺｈｅｎ?..

关键词： Cr:LiNbO3 optical waveguide proton exchange fluorescence spectra

HiFAST:An HIdata calibration and imaging pipeline for FAST

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 182-199页

作者： Yingjie Jing Jie Wang Chen Xu Ziming Liu Qingze Chen Tiantian Liang Jinlong Xu Yixian Cao Jing Wang Huijie Hu Chuan-Peng Zhang Qi Guo Liang Gao Mei Ai Hengqian Gan xuyang Gao Jinlin Han Ligang Hou Zhipeng Hou Peng jiang Xu Kong Fujia Li Zerui Liu Li Shao Hengxing Pan Jun Pan Lei Qian Jinghai Sun Ningyu Tang Qingliang Yang Bo Zhang Zhiyu Zhang Ming Zhu National Astronomical Observatories Chinese Academy of SciencesBeijing 100012China Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 02206China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Guizhou Radio Astronomical Observatory Guizhou UniversityGuiyang 55000China Max Planck Institute for Extraterrestrial Physics Garching 85748Germany Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Institute of Computational Cosmology Department of PhysicsUniversity of DurhamDurham DHI 3LEUK CAS Key Laboratory of FAST National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Deep Space Exploration Laboratory/Department of Astronomy University of Science and Technology of ChinaHefei 230026China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China Astrophysics Department of PhysicsUniversity of OxfordOxford OX/3RHUK College of Earth Sciences Guilin University of TechnologyGuilin 541004China Department of Physics Anhui Normal UniversityWuhu 241002China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Key Laboratory of Modern Astronomy and Astrophysics Nanjing UniversityNanjing 20023China

The Five-hundred-meter Aperture Spherical radio Telescope(FAST)has the largest aperture and a 19-beam L-band receiver,making it powerful for investigating the neutral hydrogen atomic gas(HI)in the *** present HiFAST(https://***),a dedicated,modular,and self-contained calibration and imaging pipeline for processing the H?data of *** pipeline consists of frequency-dependent noise diode calibration,baseline fitting,standing wave removal using an FFT-based method,flux density calibration,stray radiation correction,and gridding to produce data *** modules can be combined as needed to process the data from most FAST observation modes:tracking,drift scanning,On-The-Fly mapping,and most of their *** HiFAST,the root-mean-square(RMS)noises of the calibrated spectra from all 19 beams were only slightly(~5%)higher than the theoretical *** results for the extended source M33 and the point sources are consistent with the results from *** moment maps(0,1 and 2)of M33 agree well with the results from the Arecibo Galaxy Environment Survey(AGES)with a fractional difference of less than 10%.For a common sample of 221 sources with signal-to-noise ratio S/N>10 from the Arecibo Legacy Fast ALFA(ALFALFA)survey,the mean value of fractional difference in the integrated flux density,Sint,between the two datasets is approximately 0.005%,with a dispersion of 15.4%.Further checks on the integrated flux density of 23 sources with seven observations indicate that the variance in the flux density of the source with luminous objects(Sint>2.5 Jy km s-1)is less than 5%.Our tests suggest that the FAST telescope,with the efficient,precise,and user-friendly pipeline HiFAST,will yield numerous significant scientific findings in the investigation of the H?in the universe.

关键词： fractional luminous correction

基于林火风险的高压输电线路无人机巡检路径规划

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清华大学学报（自然科学版） 2024年第5期64卷 911-921页

作者：张佳庆孙韬蒋弘瑞段君瑞缪煦扬纪杰国网安徽省电力有限公司电力科学研究院电力火灾与安全防护安徽省重点实验室合肥230601 中国科学技术大学火灾科学国家重点实验室合肥230026

跨越林区的高压输电线路建设存在诱发森林火灾的风险,因此必须重视高压输电线路的巡检工作。目前,以防范林区火灾风险为目的开展的无人机巡检路径规划的相关研究较少,且已有研究未针对电网系统的运维安全,也未考虑各火灾风险因素间的相... 详细信息

跨越林区的高压输电线路建设存在诱发森林火灾的风险,因此必须重视高压输电线路的巡检工作。目前,以防范林区火灾风险为目的开展的无人机巡检路径规划的相关研究较少,且已有研究未针对电网系统的运维安全,也未考虑各火灾风险因素间的相互影响。因此,该文提出一种基于网络分析法(analytic network process, ANP)和遗传算法(genetic algorithm, GA)的森林电网无人机巡检路径规划方法。首先结合历史数据和实地调研,识别出影响森林火灾风险的典型因素,并对所在线路及周边林区开展火灾风险评估,划分出高火险区域;再将这些高火险区域设置为巡检节点,基于GA规划出最短的无人机巡检路径。此外,提出一种基于最大偏转角约束的路径优化方法,对路径中不满足最大偏转角约束的节点进行了优化。该文以中国安徽省某重要输电通道线路3542#—3547#为应用对象,评估得出了线路周边存在10处高火险区域,规划出长度为5 391.72 m的无人机巡检路径,再利用最大偏转角约束的方法进行路径优化,优化后的路径总长为5 401.36 m,仅比原路径增长了0.179%。该文提出的无人机巡检路径规划方法以火灾风险评估为基础,兼顾了各林火风险因素间的相互影响,可以为后续林区高压输电线路的无人机巡检路径规划相关研究提供参考。

关键词：高压输电线路无人机路径规划林区火灾网络分析法(ANP) 遗传算法(GA)

Salient Region Detection of Aerial Sea Detection Image Based on Fusion Algorithm

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Salient Region Detection of Aerial Sea Detection Image Based...

2021中国智能自动化大会(CIAC2021)

作者： Yi-chen Gai Yan-li Han Lei Peng xuyang jiang Rui-xuan Wang Naval Aviation University

Based on the attention mechanism of human vision, an image salient region detection model is proposed by fusing multi-scale and log amplitude spectrum. The model considers the characteristics of target and background at the same time, calculates the spectral residuals at different scales, and uses "center surround difference operation" for cross scale combination. According to feature integration, multi-scale feature maps are superimposed to get the final saliency map. The simulation results show that compared with the traditional detection algorithm, the improved algorithm in this paper has obvious improvement in the detection effect and accuracy of the salient region, and reduces the misjudgment rate. The salient region detection for the aerial sea detection image has certain anti-interference and applicability.

关键词： Saliency region Biological vision Multiscale analysis Spectral residuals

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“三全育人”背景下高校语文教育创新探赜

成才之路 2020年第27期 15-16页

作者：蒋旭阳怀化师范高等专科学校湖南怀化418000

高校应当坚持立德树人,积极探索有效途径,落实好“三全育人”。作为母语课程的语文,其学科性质决定了其在高校教育中的特殊地位。文章从目前高校语文教学中存在的一些问题着手,提出要创新语文教育理念和思路,创新语文教学模式、教学手... 详细信息

高校应当坚持立德树人,积极探索有效途径,落实好“三全育人”。作为母语课程的语文,其学科性质决定了其在高校教育中的特殊地位。文章从目前高校语文教学中存在的一些问题着手,提出要创新语文教育理念和思路,创新语文教学模式、教学手段和方法,创新语文教学考核评价机制,以全面提高学生的语文素养。

关键词：高校语文教育 “三全育人” 创新人才培养