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基于物理加密及KNN算法的核军控核查技术研究

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核科学与工程 2024年第3期44卷 660-666页

作者：何小锁王圣凯窦小敏路凯凯何庆华南京航空航天大学材料科学与技术学院江苏南京211106 空间核技术应用与辐射防护工业和信息化部重点实验室江苏南京211106

现阶段军控核查技术所面临的困难在于:核查人员需要在不探测敏感信息的前提下,对被检核武器的真实性给出准确结论。本工作结合物理掩模加密技术与K近邻算法,提出一种可自主加密识别核武器身份信息的核查系统。利用Geant4搭建基于中子裂... 详细信息

现阶段军控核查技术所面临的困难在于:核查人员需要在不探测敏感信息的前提下,对被检核武器的真实性给出准确结论。本工作结合物理掩模加密技术与K近邻算法,提出一种可自主加密识别核武器身份信息的核查系统。利用Geant4搭建基于中子裂变反应的物理加密辐射指纹采集装置,并通过构造多种作弊情景下的样本建立数据库,同时本研究选择KNN算法建立机器学习模型应用于未知项目的身份认证,并从鲁棒性和安全性两方面量化了该核查系统的可行性。结果表明,当样本同位素丰度由武器级铀变为较低级浓缩铀(235.的丰度由96%变为70%及以下)或者样本几何形状发生细微改变时,该系统对这两种典型的作弊情景具有优良的鉴别能力。该核查方法利用智能算法实现了核武器的自主认证,提高效率的同时有效规避了人工篡改和窥探敏感信息的风险,此外,结合物理掩模加密技术,使得敏感信息从始至终没被测量,在一定程度上降低了通过软件后门等手段作弊的风险。基于物理加密及K近邻算法的核军控核查技术能够在保护被测项目敏感信息的基础上,以较高的准确率和效率鉴定其真实性。

关键词：核军控核查物理加密 KNN算法随机掩模

基于偏振和明场多模态显微成像技术的乳腺癌智能诊断研究

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中国激光 2022年第24期49卷 46-52页

作者：许志兵吴进锦丁路王子函周苏伟尚慧王慧捷尹建华南京航空航天大学自动化学院生物医学工程系江苏南京211106

近年来,乳腺癌已成为威胁女性健康的头号恶性肿瘤,对其实现快速精准的筛查和诊断变得尤为重要。针对现有临床病理学检查需要染色突显细胞形态并依赖医生主观经验判断的局限性,立足于明场显微成像和偏振显微成像构建多模态显微成像技术,... 详细信息

近年来,乳腺癌已成为威胁女性健康的头号恶性肿瘤,对其实现快速精准的筛查和诊断变得尤为重要。针对现有临床病理学检查需要染色突显细胞形态并依赖医生主观经验判断的局限性,立足于明场显微成像和偏振显微成像构建多模态显微成像技术,获取正常与癌变乳腺组织未染色冰冻切片的形态结构及其异质性信息并对之进行分析和诊断研究。首先对正常与癌变组织切片进行多角度正交偏振成像、明场显微成像并分析图像差异性;然后实施像素级图像融合;接着利用卷积神经网络模型,对多模态融合图像进行深度学习的特征提取与分类,有效提升准确率(0.8727)和受试者特征曲线下面积(AUC,0.9400)等参数,进而实现精准的乳腺癌智能诊断。该技术有助于医生进行快速准确的临床诊断,为实施乳腺癌术中快检以辅助精准手术治疗提供有效的技术手段,具有突出的临床潜力和应用前景。

关键词：医用光学显微多模态显微成像偏振显微成像明场显微成像深度学习乳腺癌病理诊断

Bond Graph Modeling and Fault Injection of CRH5.Traction System

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Bond Graph Modeling and Fault Injection of CRH5 Traction Sys...

Vision-Based Hand Gesture Recognition for Human-Computer Interaction——A Survey

第30届中国控制与决策会议

作者： Chuanyu Zhang Xiuli wang Ningyun lu Bin Jiang college of automation engineering Nanjing University of Aeronautics and Astronautics IEEE

CRH5.electric multiple unit（EMU） traction system is a multi-domain mechatronical system with complex structure. Mechanisms on various faults or failures are not clear yet. To develop accurate system model for fault prognosis, diagnosis and propagation analysis, bond graph（BG） theory is adopted due to its unique ability in multi-domain modeling and clear cause-effect representation. With the aid of a commercial software（20-SIM）, a BG topological structure model which contains inverter, motor and gearbox, and direct torque control（DTC） unit have been developed, where DTC control the stator flux and electromagnetic torque. Common faults in EMU traction system such as motor and sensor faults are injected into the BG model. Broken rotor bar fault in driving motors is simulated by increasing gradually the number of broken bars. Three kinds of speed sensor faults are also injected to analyze their influences to the whole traction system. The simulation results are well in accordance with real CRH5.traction systems. The developed model can provide a useful platform for the study and verification of fault prognosis, diagnosis and propagation methods.

关键词： CRH5 Traction system Bond Graph Modeling Fault Injection

来源： cnki会议评论

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Wuhan university Journal of Natural Sciences 2020年第2期25卷 169-184页

作者： GAO Yongqiang lu Xiong SUN Junbin TAO Xianglin HUANG Xiaomei YAN Yuxing LIU Jia college of automation engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106JiangsuChina School of automation Nanjing University of Information Science&TechnologyNanjing 210044JiangsuChina

Recently,vision-based gesture recognition(VGR)has become a hot research spot in human-computer interaction(HCI).Unlike other gesture recognition methods with data gloves or other wearable sensors,vision-based gesture recognition could lead to more natural and intuitive HCI *** paper reviews the state-of-the-art vision-based gestures recognition methods,from different stages of gesture recognition process,i.e.,(1)image acquisition and pre-processing,(2)gesture segmentation,(3)gesture tracking,(4)feature extraction,and(5.gesture *** paper also analyzes the advantages and disadvantages of these various methods in ***,the challenges of vision-based gesture recognition in haptic rendering and future research directions are discussed.

关键词： vision-based gesture recognition human-computer interaction state-of-the-art feature extraction

基于改进YOLOv5.和传感器融合的目标检测定位

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河北科技大学学报 2024年第2期45卷 122-130页

作者：郑宇宏曾庆喜冀徐芳王荣琛宋雨昕南京航空航天大学自动化学院江苏南京211106

针对无人车环境感知过程中相机无法提供道路目标的位置信息,激光雷达点云稀疏以致检测方面难以达到很好效果的问题,提出一种通过融合两者信息进行目标检测和定位的方法。采用深度学习中YOLOv5.算法进行目标检测,通过联合标定进行相机与... 详细信息

针对无人车环境感知过程中相机无法提供道路目标的位置信息,激光雷达点云稀疏以致检测方面难以达到很好效果的问题,提出一种通过融合两者信息进行目标检测和定位的方法。采用深度学习中YOLOv5.算法进行目标检测,通过联合标定进行相机与激光雷达外参的获取以转换传感器之间的坐标,使雷达点云数据能投影到相机图像数据中,得到检测目标的位置信息,最后进行实车验证。结果表明,所提算法能在搭载TX2嵌入式计算平台的无人车自动驾驶平台上拥有27.2 Hz的检测速度,并且在一段时间的检测环境中保持12.5.%的漏检率和35.32 m的最远识别距离以及0.18 m的平均定位精度。将激光雷达和相机融合,可实现嵌入式系统下的道路目标检测定位,为嵌入式平台下环境感知系统的搭建提供了参考。

关键词：传感器技术深度学习目标检测与定位无人车环境感知相机与LiDAR融合

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基于退化特征相似性的航空发动机寿命预测

系统工程与电子技术 2019年第6期41卷 1414-1421页

作者：张妍王村松陆宁云姜斌南京航空航天大学自动化学院江苏南京210016 江苏省轨道交通车辆门系统重点实验室江苏南京210016

针对航空发动机结构复杂、性能退化参数众多、寿命预测精度低等问题,提出了一种基于退化特征相似性的寿命预测方法。首先通过基于Relief算法的退化特征筛选、基于主成分分析(principal component analysis,PCA)的特征提取和基于核函数... 详细信息

针对航空发动机结构复杂、性能退化参数众多、寿命预测精度低等问题,提出了一种基于退化特征相似性的寿命预测方法。首先通过基于Relief算法的退化特征筛选、基于主成分分析(principal component analysis,PCA)的特征提取和基于核函数的特征平滑,提取低维正交多变量退化特征;然后进行特征的相似性匹配,寻找与当前样本特征片段最相似的一组历史样本中的特征片段集合,将这些片段对应的RUL信息融合并采用密度加权方法得到当前样本的寿命预测估计值;最后通过美国国家航空航天局(national aeronautics and space administration,NASA)提供的航空涡轮扇发动机仿真数据集验证了该方法的有效性,其寿命预测性能高于现有几种代表性方法。

关键词：寿命预测性能衰退 Relief特征选择相似性密度加权

IRESbase:A Comprehensive Database of Experimentally Validated Internal Ribosome Entry Sites

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Genomics, Proteomics & Bioinformatics 2020年第2期18卷 129-139页

作者： Jian Zhao Yan Li Cong wang Haotian Zhang Hao Zhang Bin Jiang Xuejiang Guo Xiaofeng Song Department of Biomedical engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China State Key Laboratory of Reproductive Medicine Department of Histology and EmbryologyNanjing Medical UniversityNanjing 211166China Center of Pathology and Clinical Laboratory Sir Run Run HospitalNanjing Medical UniversityNanjing 211166China college of automation engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China

Internal ribosome entry sites(IRESs)are functional RNA elements that can directly recruit ribosomes to an internal position of the mRNA in a cap-independent manner to initiate ***,IRES elements have attracted much attention for their critical roles in various processes including translation initiation of a new type of RNA,circular RNA(circRNA),with no5.cap to support classical cap-dependent ***,an integrative data resource of IRES elements with experimental evidence will be useful for further *** this study,we present IRESbase,a comprehensive database of IRESs,by curating the experimentally validated functional minimal IRES elements from literature and annotating their host linear and circular *** current version of IRESbase contains 1328 IRESs,including 774 eukaryotic IRESs and 5.4 viral IRESs from 11 eukaryotic organisms and 198 viruses,*** IRESbase collects only IRES of minimal length with functional evidence,the median length of IRESs in IRESbase is 174 *** mapping IRESs to human circRNAs and long non-coding RNAs(lncRNAs),2191 circRNAs and 168 lncRNAs were found to contain at least one entire or partial IRES *** is available at http://***/cgi-bin/iresbase/***.

关键词： IRES Circular RNA Long non-coding RNA Eukaryotic IRES Viral IRES

Optically pumped wavelength-tunable lasing from a GaN beam cavity with an integrated Joule heater pivoted on Si

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Chinese Physics B 2023年第5期32卷 478-484页

作者：秦飞飞孙阳杨颖李欣王旭卢俊峰王永进朱刚毅 GaN Optoelectronic Integration International Cooperation Joint Laboratory of jiangsu Province College of Telecommunications and Information EngineeringNanjing University of Posts and TelecommunicationsNanjing 210003China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology(nanjing university of Posts and Telecommunications Ministry of Education)Nanjing 210003China Department of Microelectronic Science and engineering School of Physical Science and TechnologyNingbo UniversityNingbo 315211China college of Physics Nanjing University of Aeronautics and AstronauticsNanjing 211106China

Dynamically tunable laser sources are highly promising for realizing visionary concepts of integrated photonic circuits and other applications. In this paper, a Ga N-based laser with an integrated PN junction heater on Si is *** photoluminescence properties of the Ga N beam cavity are controlled by temperature, and the Joule heater provides electrically driven regulation of temperature. These two features of the cavity make it possible to realize convenient tuning of the lasing properties. The multi-functional Ga N beam cavity achieves optically pumped lasing with a single mode near 362.4 nm with a high Q-factor of 1394. The temperature of this device increases by 0–5. under the Joule heating effect. Then, electrical control of the lasing mode is demonstrated. The lasing resonant peak shows a continuous redshift of about 0.5.nm and the device also exhibits dynamic switching of its lasing mode. The lasing modulation can be ascribed to temperature-induced reduction of the bandgap. Our work may be of benefit for external optical modulation in future chip-based optoelectronic devices.

关键词： GaN beam cavity optically pumped lasing dynamically tunable laser source Joule heater

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基于Tree-CNN的飞机腐蚀铆钉分类

吉林大学学报（信息科学版） 2020年第1期38卷 55-63页

作者：唐露王从庆南京航空航天大学自动化学院南京210016

针对目前飞机腐蚀铆钉分类准确率较低,且以手工检测为主的现状,提出一种基于Tree结构的CNN(Convolutional Neural Networks)分类算法用于飞机铆钉腐蚀分类。算法中Tree的深度和节点数由普通结构的CNN分类方法计算得到的铆钉类别的混淆... 详细信息

针对目前飞机腐蚀铆钉分类准确率较低,且以手工检测为主的现状,提出一种基于Tree结构的CNN(Convolutional Neural Networks)分类算法用于飞机铆钉腐蚀分类。算法中Tree的深度和节点数由普通结构的CNN分类方法计算得到的铆钉类别的混淆矩阵决定,对于5.类的飞机铆钉实验,Tree的深度为3。经实验验证,所提出的Tree-CNN模型在飞机腐蚀铆钉数据集上分类精度达到86.5.,获得了较高的腐蚀铆钉分类准确率。

关键词： Tree结构 CNN网络铆钉分类混淆矩阵