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An efficient and DoS-resistant user authentication scheme for two-tiered wireless sensor networks

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第7期12卷 550-560页

作者： Rong FAN ,Dao-jing HE ,Xue-zeng PAN,Ling-di PING (School of Computer Science and Technology,Zhejiang University,Hangzhou 310027,China) School of Computer Science and Technology Zhejiang University Hangzhou China

Wireless sensor networks (WSNs) are vulnerable to security attacks due to their deployment and resource *** that most large-scale WSNs follow a two-tiered architecture,we propose an efficient and denial-of-service (DoS)-resistant user authentication scheme for two-tiered *** proposed approach reduces the computational load,since it performs only simple operations,such as exclusive-OR and a one-way hash *** feature is more suitable for the resource-limited sensor nodes and mobile *** it is unnecessary for master nodes to forward login request messages to the base station,or maintain a long user *** addition,pseudonym identity is introduced to preserve user *** clever design,our proposed scheme can prevent smart card ***,security and performance analysis demonstrates the effectiveness and robustness of the proposed scheme.

关键词： User authentication User anonymity Smart card Two-tiered Wireless sensor network (WSN)

Robust H∞ Consensus Control for High-order Discrete-time Multi-agent Systems With Parameter Uncertainties and External Disturbances

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自动化学报 2017年第10期43卷 1850-1857页

作者： Jun Xu Guoliang Zhang jing zeng Boyang Du Xiao Jia Department of Control Science and Engineering Rocket ForceUniversity of Engineering Xi'an 710025 China

The robust ${H_\infty }$ consensus control problem of highorder discrete-time multi-agent systems with parameter uncertainties and external disturbances is studied, and a linear distributed consensus protocol is designed in this paper. Firstly, the robust ${H_\infty }$ consensus control problem of high-order discrete-time multi-agent systems with parameter uncertainties and external disturbances is transformed to a robust ${H_\infty }$ control problem of a set of independent uncertain systems. Secondly, a sufficient linear matrix inequality (LMI) condition is derived to insure that high-order discrete-time multi-agent systems with parameter uncertainties and external disturbances achieve robust consensus with a ${H_\infty }$ performance level $\gamma $. Thirdly, convergence results are given as final consensus values of high-order discrete-time linear multi-agent systems with parameter uncertainties and without external disturbances. Finally, a contrast numerical experiment with and without parameter uncertainties is provided to demonstrate the correctness and effectiveness of the theoretical results.

关键词：参数不确定性多智能体系统离散时间一致性控制高阶外部扰动鲁棒线性矩阵不等式

Immune response induced by hematoporphyrin derivatives mediated photodynamic therapy:Immunogenic cell death and elevated costimulatory molecules

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Journal of Innovative Optical Health Sciences 2022年第4期15卷 49-60页

作者： Shan Long Yibing Zhao Yuanyuan Xu Hui Li Hongyou Zhao Defu Chen jing zeng Haixia Qiu Xiaosong Li Ying Gu School of Medicine Nankai University Tianjin 300072P.R.China Department of Laser Medicine The First Medical Center of Chinese PLA General Hospital Beijing 100853 P.R.China Department of Oncology The Seventh Medical Center of Chinese PLA General Hospital Beijing 100039 P.R.China College of Medical Technology Beijing Institute of Technology Beijing 100081P.R.China

Photodynamic therapy(PDT)not only destroys tumor cells directly but also induced anti-tumor immune response through damage-associated molecular patterns(DAMPs).It is reported that anti-tumor response was associated with light dose and photosensitizer used in *** this study,4T1 tumor cells were implanted on both the right and left flanks of *** the right tumor was treated by HpD-PDT,while the left tumor was not *** anti-tumor immune response induced by HpD-PDT was *** expression of DAMPs and costimulatory molecules induced by HpD-PDT were tested by immuno fluorescence and flow cytometry in *** light doses of PDT were designed to treat 4T1 *** killing effect was assessed by CCK-8 kit and apoptosis *** expression of DAMPs on 4T1 cells after HpDPDT were evaluated by flow cytometry,western blot and ATP *** study showed that CD4^(+)T,CD8^(+)T and the production of IFN-γwere increased significantly on day 10 in righttumor after PDT treatment compared with control ***-PDT enhanced the expression of calreticulin(CRT)on tumor ***,co-stimulatory molecular OX-40 and 4-1BB were elevated on CD8^(+)T *** vitro,immunogenic death of 4T1 cells was induced after ***,the expression of DAMPs increased with the increasing of energy *** study indicates that anti-tumor immune effect was induced by *** knowledge of the involvement of CRT,ATP and co-stimulatory molecules uncovers important mechanistic insight into the anti-tumor *** was the first time that co-stimulatory molecules were investigated and found to elevate after PDT.

关键词： Photodynamic therapy hematoporphyrin derivatives anti-tumor immune effect immunogenic cell death costimulatory molecule

High-resolution structure-from-motion models covering 160 km-long surface ruptures of the 2021 M_(W)7.4 Madoi earthquake in northern Qinghai-Tibetan Plateau

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Earthquake Research Advances 2022年第2期2卷 38-48页

作者： jing Liu-zeng Wenqian Yao Xiaoli Liu Yanxiu Shao Wenxin Wang Longfei Han Yan Wang Xianyang zeng Jinyang Li Zijun Wang Zhijun Liu Hongwei Tu Institute of Surface-Earth System Science School of Earth System ScienceTianjin UniversityTianjin300072China State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake AdministrationBeijing100029China Key Laboratory of Earthquake Geodesy Institute of SeismologyChina Earthquake AdministrationWuhan430071China Earthquake Agency of Qinghai Province Xining810001China

The May 222021 M_(W)7.4 Madoi,Qinghai,China earthquake presented a rare opportunity to apply the modern unmanned aerial vehicle(UAV)photography method in extreme altitude and weather conditions to image surface ruptures and near-field effects of earthquake-related surface deformations in the remote ***-resolution aerial photographs were acquired in the days immediately following the *** complex surface rupture patterns associated with this event were covered comprehensively at 3-6 cm *** effort represents the first time that an earthquake rupture in the interior of the Qinghai-Tibetan Plateau has been fully and systematically captured by such high-resolution imagery,with an unprecedented level of detail,over its entire *** dataset has proven valuable in documenting subtle and transient rupture features,such as the significant mole-tracks and opening fissures,which were ubiquitous coseismically but degraded during the subsequent summer storm *** high-quality imagery also helps to document with high fidelity the fractures of the surface rupture zone(supplements of this paper),the pattern related to how the faults ruptured to the ground surface,and the distribution of off-fault *** combination with other ground-based mapping efforts,the data will be analyzed in the following months to better understand the mechanics of earthquake rupture related to the fault zone rheology,rupture dynamics,and frictional properties along with the fault interface.

关键词： UAV photography Earthquake surface rupture Structure-from-Motion 2021 M_(W)7.4 Madoi earthquake

Treatment of corneal dermoid with lenticules from small incision lenticule extraction surgery:a surgery assisted by fibrin glue

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International Journal of Ophthalmology(English edition) 2023年第4期16卷 547-553页

作者： Jiao-Lian Liu Jia-Yue Ji Qing Ye Liu-Qing Wei Xin Zhong Lin-Zhi Jiang jing zeng Department of Ophthalmology the First Affiliated Hospital of Guangxi Medical UniversityNanning 530021Guangxi Zhuang Autonomous RegionChina Department of Ophthalmology Hubei Provincial Hospital of Integrated Chinese and Western MedicineWuhan 430015Hubei ProvinceChina Department of Ophthalmology Fangchenggang First People’s HospitalFangchenggang 538001Guangxi Zhuang Autonomous RegionChina

AIM:To observe the clinical efficacy of the combined use of small incision lenticule extraction(SMILE)-derived lenticule patches in corneal dermoid excision,with fixation of the lenticule patches assisted by fibrin ***:Seventeen eyes of 17 patients with corneal dermoid were treated with dermoid removal combined with SMILE-derived lenticule *** lenticule patches were fixed by fibrin *** changes were assessed using slit lamp microscopy and anterior-segmental optical coherence *** best-corrected visual acuity(BCVA)and ocular dioptric variations were examined preoperatively and *** pressure(IOP)was also monitored in all visited ***:Totally,18 lenticule patches were used on 17 eyes of 17 cornea dermoid *** mean follow-up time was 11.47±*** lenticule patches we resuccessfullyg lued,kept on its location and maintained transparent during the follow-up time,with a consecutive epithelial cover for *** of the patients could coordinate visual and optometry exam *** preoperative BCVA is 0.60±0.35 in decimal,significantly improved to 0.80±0.26 in decimal at 6mo postoperatively(Z=-2.392,P=0.017),but the changes of their corneal astigmatism diopters showed no significance,with 2.22±1.91 D preoperatively,and 2.28±1.31 D at 6mo postoperatively(Z=-0.135,P=0.893).Limbal pannus formation occurred in 4(23.52%)cases and decreased with the application of tacrolimus *** increased in 2(11.76%)cases,but well decreased by timolol maleate *** the adult patients or guardians of minor patients were satisfied with the cosmetic ***:Dermoid excision combined with transplantation of SMILE-derived lenticule patches using fibrin glue is a safe and effective novel tectonic keratoplasty procedure for corneal dermoid.

关键词： corneal dermoid small incision lenticule extraction fibrin glue

Comparative study on Photobiomodulation between 630 nm and 810 nm LED in diabetic wound healing both in vitro and in vivo

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Journal of Innovative Optical Health Sciences 2022年第2期15卷 58-67页

作者： Hongyou Zhao Tengda Ji Tianzhen Sun Haolin Liu Yidi Liu Defu Chen Ying Wang Yizhou Tan jing zeng Haixia Qiu Ying Gu Department of Laser Medicine The First Medical Centre Chinese PLA General Hospital Beijing 100853P.R.China Institute of Engineering Medicine Beijing Institute of Technology Beijing 100081P.R.China Precision Laser Medical Diagnosis and Treatment Innovation Unit Chinese Academy of Medical Sciences Beijing 100000P.R.China Medical School of Chinese PLA Beijing 100853P.R.China

Photobiomodulation(PBM)promoting wound healing has been demonstrated by many ***,630 nm and 810 nm light-emitting diodes(LEDs),as light sources,are frequently used in the treatment of diabetic foot ulcers(DFUs)in ***,the dose-effect relationship of LED-mediated PBM is not fully ***,among the 630 nm and 810 nm LEDs,which one gets a better effect on accelerating the wound healing of diabetic ulcers is not *** aim of this study is to evaluate and compare the effects of 630 nm and 810 nm LED-mediated PBM in wound healing both in vitro and in *** results showed that both 630 nm and 810 nm LED irradiation significantly promoted the proliferation of mouse fibroblast cells(L929)at different light irradiances(1,5,and 10 mW/cm^(2)).The cell proliferation rate increased with the extension of irradiation time(100,200,and 500 s),but it decreased when the irradiation time was over 500 *** 630 nm and 810nm LED irradiation(5 mW/cm^(2))significantly improved the migration capability of L929 *** difference between 630 nm and 810 nm LED-mediated PBM in promoting cell proliferation and migration was *** vivo results presented that both 630 nm and 810 nm LED irradiation promoted the wound healing and the expression of the vascular endothelial growth factor(VEGF)and transforming growth factor(TGF)in the wounded skin of type 2 diabetic ***,these results suggested that LED-mediated PBM promotes wound healing of diabetic mice through promoting fibroblast cell proliferation,migration,and the expression of growth factors in the wounded ***(630 nm and 810 nm)have a similar outcome in promoting wound healing of type 2 diabetic mice.

关键词： Photobiomodulation(PBM) light-emitting diode(LED) wound healing diabetic ulcers

高速车辆轮轨接触几何关系及车轮磨耗疲劳研究

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中国铁道科学 2014年第4期35卷 80-87页

作者：吴娜曾京西南交通大学牵引动力国家重点实验室四川成都610031

将我国高速铁路常用车轮的原始型面(S1002CN,LMA和XP55)及运行20万km后的磨耗型面(S1002CN_20,LMA_20和XP55_20)分别与CHN60钢轨进行匹配,分析轮对内侧距和摇头角的变化对轮轨接触几何关系的影响规律。在此基础上,采用Archard磨耗模型... 详细信息

将我国高速铁路常用车轮的原始型面(S1002CN,LMA和XP55)及运行20万km后的磨耗型面(S1002CN_20,LMA_20和XP55_20)分别与CHN60钢轨进行匹配,分析轮对内侧距和摇头角的变化对轮轨接触几何关系的影响规律。在此基础上,采用Archard磨耗模型和滚动接触疲劳模型并结合车辆动力学模型,建立车轮磨耗疲劳预测模型,对不同型面车轮的磨耗和滚动接触疲劳进行研究和预测。结果表明:S1002CN型面车轮的轮轨接触几何关系对车轮磨耗、轮对内侧距和摇头角的变化最为敏感,该型面车轮的最大磨耗深度最大且范围最广;XP55型面车轮的磨耗范围最小,LMA型面车轮的最大磨耗深度最小;XP55型面车轮的轮轨接触应力较大,经过曲线线路时易发生高周疲劳现象,但这种现象在车轮磨耗后消失;S1002CN和LMA型面车轮的轮轨接触应力较小,但在车轮磨耗后轮轨的接触应力明显增大,易发生高周疲劳。

关键词：高速轮轨关系车轮型面轮轨接触几何轮对内侧距摇头角车轮磨耗滚动接触疲劳

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摆式列车主动倾摆控制的数值仿真研究

铁道学报 2006年第5期28卷 28-34页

作者：罗仁曾京西南交通大学牵引动力国家重点实验室四川成都610031

为了仿真研究摆式列车倾摆控制信号的生成和倾摆控制规律,笔者建立了摆式列车机电耦合动力学模型和倾摆系统模型。该模型通过位于头车一位构架上的陀螺仪实时检测曲线,由同一位置的横向加速度滤波信号得到倾摆控制信号,并用线性预测法... 详细信息

为了仿真研究摆式列车倾摆控制信号的生成和倾摆控制规律,笔者建立了摆式列车机电耦合动力学模型和倾摆系统模型。该模型通过位于头车一位构架上的陀螺仪实时检测曲线,由同一位置的横向加速度滤波信号得到倾摆控制信号,并用线性预测法得到头车和第二辆车的倾摆控制信号。设计了倾摆系统的P数字控制器和H∞鲁棒数字控制器。采用数值积分方法进行仿真计算,研究了各种计算工况下2种控制器的控制效果。针对倾摆角度、角速度和角加速度进行比较分析,结果表明,2种控制器都能很好地跟踪倾摆控制信号,在有反馈干扰或控制信号突变时,鲁棒控制器可以更好地抑制倾摆角加速度;减小P控制的比例系数可以降低倾摆角加速度,但跟踪性能变差。

关键词：摆式列车 P控制 H∞鲁棒控制主动倾摆控制

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铁道车辆防滑控制仿真

机械工程学报 2008年第3期44卷 29-34页

作者：罗仁曾京西南交通大学牵引动力国家重点实验室成都610031

列车的可靠制动是其安全运行的必要保证,而制动过程中的防滑控制又是安全制动和缩短制动距离的有效途径。建立车辆制动动力学模型和单轮对制动动力学模型,车辆系统自由度为42,建模中考虑车辆系统悬架力非线性、轮轨接触几何关系非线性... 详细信息

列车的可靠制动是其安全运行的必要保证,而制动过程中的防滑控制又是安全制动和缩短制动距离的有效途径。建立车辆制动动力学模型和单轮对制动动力学模型,车辆系统自由度为42,建模中考虑车辆系统悬架力非线性、轮轨接触几何关系非线性和轮轨蠕滑力非线性。考虑到盘型制动系统的摩擦特性和制动缸压力变化特性,建立了制动系统力学模型。采用P控制方法,用数值仿真方法研究准高速列车制动过程的防滑控制。计算结果表明,P控制能有效防止车轮在轮轨粘着力较低时的滑行,从而提高制动的可靠性和缩短制动距离,并减小制动过程中车辆的纵向振动。

关键词：铁道车辆制动防滑控制动力学仿真