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Local Adaptive Gradient Variance Attack for Deep Fake Fingerprint Detection

Computers, Materials & Continua 2024年第1期78卷 899-914页

作者： Chengsheng Yuan Baojie Cui zhili zhou Xinting Li Qingming Jonathan Wu Engineering Research Center of Digital Forensics Ministry of EducationNanjing University of Information Science and TechnologyNanjing210044China School of Computer Science Nanjing University of Information Science and TechnologyNanjing210044China Institute of Artificial Intelligence and Blockchain Guangzhou UniversityGuangzhou510006China School of International Relations National University of Defense TechnologyNanjing210039China Department of Electrical and Computer Engineering University of WindsorWindsorN9B 3P4Canada

In recent years,deep learning has been the mainstream technology for fingerprint liveness detection(FLD)tasks because of its remarkable ***,recent studies have shown that these deep fake fingerprint detection(DFFD)models are not resistant to attacks by adversarial examples,which are generated by the introduction of subtle perturbations in the fingerprint image,allowing the model to make fake *** of the existing adversarial example generation methods are based on gradient optimization,which is easy to fall into local optimal,resulting in poor transferability of adversarial *** addition,the perturbation added to the blank area of the fingerprint image is easily perceived by the human eye,leading to poor visual *** response to the above challenges,this paper proposes a novel adversarial attack method based on local adaptive gradient variance for *** ridge texture area within the fingerprint image has been identified and designated as the region for perturbation ***,the images are fed into the targeted white-box model,and the gradient direction is optimized to compute gradient ***,an adaptive parameter search method is proposed using stochastic gradient ascent to explore the parameter values during adversarial example generation,aiming to maximize adversarial attack *** results on two publicly available fingerprint datasets show that ourmethod achieves higher attack transferability and robustness than existing methods,and the perturbation is harder to perceive.

关键词： FLD adversarial attacks adversarial examples gradient optimization transferability

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智能船舶的发展与展望

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中国海事 2024年第3期 25-28页

作者：耿雄飞丁格格周智力交通运输部水运科学研究院北京100088 中国船级社天津分社天津300457

在人工智能等新一代信息技术的推动下,智能船舶作为航运业数字智能转型的关键载体,成为推动航运业高质量发展的新引擎。通过分析了赛博航运的发展演化内涵和智能船舶的认知与辨析,梳理了智能船舶的发展现状,包括典型案例的进展、法律法... 详细信息

在人工智能等新一代信息技术的推动下,智能船舶作为航运业数字智能转型的关键载体,成为推动航运业高质量发展的新引擎。通过分析了赛博航运的发展演化内涵和智能船舶的认知与辨析,梳理了智能船舶的发展现状,包括典型案例的进展、法律法规的修订完善以及基础设施的协同发展。在此基础上,探讨了智能船舶发展面临的关键技术难题和安全风险,对未来技术成熟度、应用广泛度以及基础设施与生产关系的变革进行了预判,并从行业未来的发展趋势角度提出了相关建议。

关键词：智能船舶赛博航运数字智能转型

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基于注意力机制与多尺度融合的PCB缺陷检测

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无线电工程 2024年第1期54卷 6-13页

作者：陆维宽周志立阮秀凯聂赛赛温州大学电气与电子工程学院浙江温州325035 温州大学智能锁具研究院浙江温州325036

针对印制电路板(PCB)缺陷区域受背景干扰过多以及缺陷目标尺度较小导致缺陷检测精度低的问题,提出了一种基于注意力机制与多尺度融合的PCB缺陷检测方法。在YOLOv5模型的特征提取网络中,引入一种三维注意力模块,以增强缺陷目标特征的显著... 详细信息

针对印制电路板(PCB)缺陷区域受背景干扰过多以及缺陷目标尺度较小导致缺陷检测精度低的问题,提出了一种基于注意力机制与多尺度融合的PCB缺陷检测方法。在YOLOv5模型的特征提取网络中,引入一种三维注意力模块,以增强缺陷目标特征的显著度,使模型更加注重目标特征;为充分利用微小缺陷目标的多尺度特征,在特征融合网络中引入加权双向特征金字塔网络(Bi-directional Feature Pyramid Network, BiFPN),减少缺陷目标特征信息的丢失,提高模型对微小缺陷目标的检测精度。实验结果表明,该方法能够准确检测出PCB图像中的缺陷目标,在保证实时性的同时,较原方法的平均检测精度提高了3.9%,表明了该方法的有效性。

关键词：印制电路板缺陷检测 YOLOv5 注意力机制多尺度融合

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基于多层方环模型的低通高阻频选结构设计方法

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电子信息对抗技术 2024年第1期39卷 75-80页

作者：姚智馨陈晓刚周治立杜建春中国电子科技集团公司第二十九研究所成都610036 中航工业第一飞机设计研究院西安710089

作为一种性能优异的空间滤波装置,频率选择表面(结构)被广泛应用于隐身天线罩设计之中。提出一种基于多层方环模型的低通高阻频选结构设计方法,整体模型由三层带阻方环结构和空气隔层构成,多层结构可以在极大展宽阻带带宽的同时保证较... 详细信息

作为一种性能优异的空间滤波装置,频率选择表面(结构)被广泛应用于隐身天线罩设计之中。提出一种基于多层方环模型的低通高阻频选结构设计方法,整体模型由三层带阻方环结构和空气隔层构成,多层结构可以在极大展宽阻带带宽的同时保证较低的透波插损。计算和仿真结果表明,所设计的频选结构能够在1~6 GHz实现至多1 dB的低频插损,同时保证在8~18 GHz实现至少10 dB的高频插损(90%以上反射)。

关键词：频率选择表面隐身天线罩低通高阻多层方环结构

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世界文化旅游名城评价标准研究

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资源开发与市场 2024年第3期40卷 444-450页

作者：明庆忠周志利史鹏飞王雪波杨德钦云南财经大学旅游文化产业研究院云南昆明650221 云南尚博智库旅游营销策划有限公司云南昆明650227

旅游城市高品质建设和城市旅游高质量发展,对如何打造世界文化旅游名城提出了新要求。在剖析世界文化旅游名城发展趋势的基础上,从自身的内涵和特征出发,通过对国家、行业和学界相关评价标准的回顾,结合理论分析、实践经验和专家咨询,... 详细信息

旅游城市高品质建设和城市旅游高质量发展,对如何打造世界文化旅游名城提出了新要求。在剖析世界文化旅游名城发展趋势的基础上,从自身的内涵和特征出发,通过对国家、行业和学界相关评价标准的回顾,结合理论分析、实践经验和专家咨询,探索构建了世界文化旅游名城的评价指标体系。着眼于文旅吸引力国际化水平、产业发展能力国际化水平、城市高质量发展国际化水平、市场发育潜力国际化水平、游客体验质量综合水平等五个维度,尤其注重游客满意度、创新能力、品牌形象等方面,选取了15个二级指标、细化出100个三级指标形成了世界文化旅游名城评价指标体系,并根据评价分值,将世界文化旅游名城的发展阶段划分为基础夯实阶段、建设冲刺阶段、基本建成阶段、全面建成阶段。

关键词：世界文化旅游名城发展趋势评价标准高质量发展

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ANALYTICAL SOLUTION OF WAVE-INDUCED SEEPAGE PRESSURE ACTING ON THE BASE OF BREAKWATER

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Journal of Hydrodynamics 1993年第1期5卷 42-51页

作者： zhou, zhili Qiu, Dahong Dalian Univ of Technology Dalian China

The wave loads acting on a breakwater resting on seabed include not only the wave force from the wave field around the structure but also the wave-induced seepage pressure acting on the base of *** latter is also a circumstance load which can not be neglected in engineering *** paper presents a closed-form analytical solution of wave-induced seep- age pressure acting on the base of breakwater resting on an infinite-depth porous elastic seabed. Based on the Biot's consolidation theory,the soil deformation and the compressibility of pore wa- ter are *** water wave pressure on sea bottom is determined by the linear water wave *** numerical results of uplifting force and moment caused by the wave-induced seepage pressure are given and the influences of soil deformation and pore water compressibility on the calculation results are discussed.

关键词： seepage pressure break water seepage flow uplifting force

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Speed control strategy for tractor assisted driving based on chassis dynamometer test

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International Journal of Agricultural and Biological Engineering 2021年第6期14卷 169-175页

作者： Xiaorui Zhang zhili zhou School of Mechanical and Precision Instrument Engineering Xi’an University of TechnologyXi’an 710048China School of Vehicle and Traffic Engineering School Henan University of Science and TechnologyLuoyang 471003China

Realizing automation of the chassis dynamometer and the unmanned test workshop is an inevitable trend in the development of new tractor *** accuracy of the speed control of the test tractor directly affects the accuracy of the test loading *** order to meet the purpose of precise control of the test tractor speed on the chassis dynamometer,a fuzzy PID control strategy was developed according to the working principle of assisted *** the basis of traditional PID control,the parameters of fuzzy inference module were added for real-time adjustment to achieve faster response to tractor speed changes and more precise control of tractor *** Matlab-Cruise co-simulation platform was established for simulation,and the experiment was verified by the tractor chassis dynamometer using the NEDC working condition and tractor ploughing working *** results show that both PID control and fuzzy PID control can achieve tractor speed following accuracy of±0.5 km/*** PID control has higher tractor speed following accuracy,faster response when speed changes,less tractor speed fluctuation,and overall control effect is better than PID *** research results can provide a reference for the realization of the chassis dynamometer unmanned test workshop.

关键词： tractor chassis dynamometer assisted driving speed control fuzzy PID

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Effects of tree size and organ age on variations in carbon,nitrogen,and phosphorus stoichiometry in Pinus koraiensis

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Journal of Forestry Research 2024年第3期35卷 155-165页

作者： Yanjun Wang Guangze Jin zhili Liu Center for Ecological Research Northeast Forestry UniversityHarbin 150040People's Republic of China Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education Northeast Forestry UniversityHarbin 150040People's Republic of China Northeast Asia Biodiversity Research Center Northeast Forestry UniversityHarbin 150040People's Republic of China

Carbon(C),nitrogen(N),and phosphorus(P)are of fundamental importance for growth and nutrient dynamics within plant organs and deserve more attention at regional to global ***,our knowledge of how these nutrients vary with tree size,organ age,or root order at the individual level remains *** determined C,N,and P contents and their stoichiometric ratios(i.e.,nutrient traits)in needles,branches,and fine roots at different organ ages(0-3-year-old needles and branches)and root orders(1st-4th order roots)from 64 Pinus koraiensis of varying size(Diameter at breast height ranged from 0.3 to 100 cm)in northeast *** factors were also *** results show that nutrient traits were regulated by tree size,organ age,or root order rather than soil *** a whole-plant level,nutrient traits decreased in needles and fine roots but increased in branches with tree *** the organ level,age or root order had a negative effect on C,N,and P and a positive effect on stoichiometric *** results demonstrate that nutrient variations are closely related to organ-specific functions and ecophysiological processes at an individual *** is suggested that the nutrient acquisition strategy by younger trees and organ fractions with higher nutrient content is for ***,nutrient storage strategy in older trees and organ fractions are mainly for steady *** results clarified the nutrient utilization strategies during tree and organ ontogeny and suggest that tree size and organ age or root order should be simultaneously considered to understand the complexities of nutrient variations.

关键词： Tree size Organ age(or root order) Carbon(C) Nitrogen(N) Phosphorus(P) Pinus koraiensis

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Bionic optimization research of soil cultivating component design

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Science China(Technological Sciences) 2009年第4期52卷 955-965页

作者： GUO ZhiJun zhou zhili ZHANG Yi LI ZhongLi College of Vehicle and Motive Power Engineering Henan University of Science&TechnologyLuoyang 471003China

The basic biomechanical laws that apply to the clawed toes of animals with powerful digging abilities and the optimal bionic design of curved soil cultivating components with an analogous contour were researched in a novel way. First, the curvature and profile of the inside contour line of a field mouse’s clawed toe were analyzed. The finite element method (FEM) was then used to simulate the working process in order to study the changing characteristics of the working resistance of bionic soil- engag- ing surfaces and the stress field of the processed soil. A straight-line cultivating component was used for comparative analysis. In accordance with the simulation results, a series of soil cultivating com- ponents of varying design were manufactured. An indoor soil bin experiment was carried out to meas- ure their working resistance and validate the results of the FEM analysis. The results of this research would have important values in the optimization design of cultivating components for energy and cost savings.

关键词： animal clawed toes soil cultivating component bionics optimization design energy-savings

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Coverless Information Hiding Based on the Molecular Structure Images of Material

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Computers, Materials & Continua 2018年第2期54卷 197-207页

作者： Yi Cao zhili zhou Xingming Sun Chongzhi Gao School of Computer and Software Nanjing University of Information Science and TechnologyNing Liu RoadNO.219Nanjing210044China Jiangsu Engineering Centre of Network Monitoring Ning Liu RoadNo.219Nanjing210044China Department of Electrical and computer Engineering University of Windsor401 Sunset AvenueWindsorONCanada N9B 3P4 School of Computer Science Guangzhou UniversityWaihuanxi RoadNo.230Guangzhou510006China

The traditional information hiding methods embed the secret information by modifying the carrier,which will inevitably leave traces of modification on the *** this way,it is hard to resist the detection of steganalysis *** address this problem,the concept of coverless information hiding was *** information hiding can effectively resist steganalysis algorithm,since it uses unmodified natural stego-carriers to represent and convey confidential ***,the state-of-the-arts method has a low hidden capacity,which makes it less *** the pixel values of different regions of the molecular structure images of material(MSIM)are usually different,this paper proposes a novel coverless information hiding method based on MSIM,which utilizes the average value of sub-image’s pixels to represent the secret information,according to the mapping between pixel value intervals and secret *** addition,we employ a pseudo-random label sequence that is used to determine the position of sub-images to improve the security of the *** the histogram of the Bag of words model(BOW)is used to determine the number of subimages in the image that convey secret ***,to improve the retrieval efficiency,we built a multi-level inverted index ***,the proposed method can also be used for other natural *** with the state-of-the-arts,experimental results and analysis manifest that our method has better performance in anti-steganalysis,security and capacity.

关键词： Coverless information hiding molecular structure images of material pixel value inverted index image retrieval bag of words model

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