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RWNeRF:Robust Watermarking Scheme for Neural Radiance Fields Based on Invertible Neural Networks

Computers, Materials & Continua 2024年第9期80卷 4065-4083页

作者： Wenquan Sun Jia Liu Weina Dong lifeng Chen Fuqiang Di Department of Cryptographic Engineering Engineering University of PAPXi’an710086China Department of Cryptographic Engineering Key Laboratory of PAP for Cryptology and Information SecurityXi’an710086China

As neural radiance fields continue to advance in 3D content representation,the copyright issues surrounding 3D models oriented towards implicit representation become increasingly *** response to this challenge,this paper treats the embedding and extraction of neural radiance field watermarks as inverse problems of image transformations and proposes a scheme for protecting neural radiance field copyrights using invertible neural network *** 2D image watermarking technology for 3D scene protection,the scheme embeds watermarks within the training images of neural radiance fields through the forward process in invertible neural networks and extracts them from images rendered by neural radiance fields through the reverse process,thereby ensuring copyright protection for both the neural radiance fields and associated 3D ***,challenges such as information loss during rendering processes and deliberate tampering necessitate the design of an image quality enhancement module to increase the scheme’s *** module restores distorted images through neural network processing before watermark ***,embedding watermarks in each training image enables watermark information extraction from multiple *** proposed watermarking method achieves a PSNR(Peak Signal-to-Noise Ratio)value exceeding 37 dB for images containing watermarks and 22 dB for recovered watermarked images,as evaluated on the Lego,Hotdog,and Chair datasets,*** results demonstrate the efficacy of our scheme in enhancing copyright protection.

关键词： Neural radiance fields 3D scene robust watermarking invertible neural networks

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Variational Analysis Based on Proximal Subdifferential on Smooth Banach Spaces

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Acta Mathematica Sinica,English Series 2024年第2期40卷 595-618页

作者： xi Yin ZHENG Department of Mathematics Yunnan UniversityKunming 650091P.R.China

This paper first shows that for any p∈(1,2)there exists a continuously differentiable function f on l^(p)(and L^(p))such that the proximal subdifferential of f is empty everywhere,and hence it is not suitable to develop theory on proximal subdifferential in the classical Banach spaces l^(P)and L^(P) with p∈(1,2).On the other hand,this paper establishes variational analysis based on the proximal subdifferential in the framework of smooth Banach spaces of power type 2,which conclude all Hilbert spaces and all the classical spaces l^(P)and L^(P)with p∈(2,+∞).In particular,in such a smooth space,we provide the proximal subdifferential rules for sum functions,product functions,composite functions and supremum functions,which extend the basic results on the proximal subdifferential established in the framework of Hilbert *** of our main results are new even in the Hilbert space *** applications,we provide KKT-like conditions for nonsmooth optimization problems in terms of proximal subdifferential.

关键词： Smooth Banach space proximal subdifferential proximal normal cone KKT condition

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基于改进的BP神经网络的有初始几何缺陷的薄壁箱形结构承载能力的预测

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机械强度 2006年第2期28卷 292-296页

作者：夏守长刘刚奚立峰胡宗武上海交通大学工业工程系上海200030 武汉理工大学物流工程系武汉430063

采用改进的BP(back propagation)神经网络代替非线性有限元法,研究有初始几何缺陷的薄壁箱形结构的承载能力。在神经网络学习过程中,通过不断调整每一层的权重值和阈值的方法来改进算法,加快计算的进程;同时,讨论预测过程中神经网络的... 详细信息

采用改进的BP(back propagation)神经网络代替非线性有限元法,研究有初始几何缺陷的薄壁箱形结构的承载能力。在神经网络学习过程中,通过不断调整每一层的权重值和阈值的方法来改进算法,加快计算的进程;同时,讨论预测过程中神经网络的拓扑结构和结构参数的选择,将预测结果与有限元法计算结果比较后表明该方法的有效性。最后,通过实例说明BP神经网络预测在工程中的应用。

关键词： BP神经网络几何缺陷薄壁箱形结构强度稳定性

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面向租赁服务网络广域运维的3层机会维护调度策略

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上海交通大学学报 2019年第4期53卷 387-395页

作者：司国锦夏唐斌宋亚奚立峰上海交通大学机械与动力工程学院上海200240

针对当前设备供应商提供全球维护服务中存在的租赁服务网络的广域运维问题,提出设备层、系统层、网络层动态交互的3层机会维护调度策略.根据各台设备的独立健康演化趋势,实时地规划设备层的预知维护时间间隔;基于贯序的设备层输出,在系... 详细信息

针对当前设备供应商提供全球维护服务中存在的租赁服务网络的广域运维问题,提出设备层、系统层、网络层动态交互的3层机会维护调度策略.根据各台设备的独立健康演化趋势,实时地规划设备层的预知维护时间间隔;基于贯序的设备层输出,在系统层进行优化调度并输出成组维护方案;基于各租赁产线的维护需求,在网络层解决租赁服务需求和维护资源约束之间的供需矛盾问题.根据调度特点建立数学优化模型,动态地更新决策向量和状态向量,并由此提出3层机会维护调度策略,得出层次递进的交互求解算法.通过算例分析,验证所提出的调度策略在广域运维领域的可行性和有效性.

关键词：机会维护租赁服务网络利润优化广域运维

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基于敏感度分析的制造系统工位设计布置评价

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机械工程学报 2008年第10期44卷 38-43页

作者：孙继文奚立峰潘尔顺杜世昌上海交通大学机械与动力工程学院上海200240

针对制造过程中产品特征和控制特征偏差沿工位不断传递和累积影响了最终产品质量,提出基于敏感度分析的多工位制造系统工位设计布置评价方法。将工位参数代替时间参数,对多工位制造系统进行状态空间建模,建立了关键控制特征点的偏差传... 详细信息

针对制造过程中产品特征和控制特征偏差沿工位不断传递和累积影响了最终产品质量,提出基于敏感度分析的多工位制造系统工位设计布置评价方法。将工位参数代替时间参数,对多工位制造系统进行状态空间建模,建立了关键控制特征点的偏差传递和累积以及对关键产品特征点影响的系统化模型。提出三级层次敏感度指标(元件级/工位级/系统级),全面描述关键特征点的相互影响和不同的工位设计布置对偏差传递的作用。根据敏感度分析计算结果,提出了设计评价改进流程,以选择最优的系统设计方案,识别关键工位及确定单个最大的元件级偏差源。通过实例验证了评价指标和分析方法的有效性和可行性。

关键词：敏感度分析多工位制造系统状态空间建模关键特征

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A Generalized Blow up Criteria with One Component of Velocity for 3D Incompressible MHD System

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Chinese Annals of Mathematics,Series B 2024年第2期45卷 253-264页

作者： Bin HAN xi xiONG Department of Mathematics Hangzhou Dianzi UniversityHangzhou 310018China

In this paper,the authors study the global regularity of the 3D magnetohydrodynamics system in terms of one velocity *** particular,they establish a new Prodi-Serrin type regularity criterion in the framework of weak ... 详细信息

关键词： MHD Regularity Blow-up criterion

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一种基于小波域的分形编码预测方法

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计算机应用与软件 2007年第6期24卷 68-70页

作者：张梁斌奚李峰浙江万里学院计算机与信息学院浙江宁波315100

提出了一种小波域内相邻子图的分形编码预测方法。首先选择合适小波基对图像进行二级分解,然后对三个二级高频子图进行Jacqain方法的分形编码,利用小波域内同方向不同分辨率子图之间的相似性,对得到的分形编码参数进行适当比例变换,最... 详细信息

提出了一种小波域内相邻子图的分形编码预测方法。首先选择合适小波基对图像进行二级分解,然后对三个二级高频子图进行Jacqain方法的分形编码,利用小波域内同方向不同分辨率子图之间的相似性,对得到的分形编码参数进行适当比例变换,最终从水平、垂直和斜方向等三个方向近似预测出对应的一级高频子图分形编码。实验表明,与Jacqain相比本方法在同类图像基本保证解压图像质量的同时,极大地缩短了编码时间和提高了压缩比。

关键词：小波域分形编码预测编码时间

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A review of the neurotransmitter system associated with cognitive function of the cerebellum in Parkinson's disease

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Neural Regeneration Research 2024年第2期19卷 324-330页

作者： xi Chen Yuhu Zhang Department of Neurology Guangdong Neuroscience InstituteGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouGuangdong ProvinceChina Shantou University Medical College ShantouGuangdong ProvinceChina

The dichotomized brain system is a concept that was generalized from the‘dual syndrome hypothesis’to explain the heterogeneity of cognitive impairment,in which anterior and posterior brain systems are independent but partially *** dopaminergic system acts on the anterior brain and is responsible for executive function,working memory,and *** contrast,the cholinergic system acts on the posterior brain and is responsible for semantic fluency and visuospatial *** from dopaminergic/cholinergic imaging or functional neuroimaging has shed significant insight relating to the involvement of the cerebellum in the cognitive process of patients with Parkinson’s *** research has reported evidence that the cerebellum receives both dopaminergic and cholinergic ***,whether these two neurotransmitter systems are associated with cognitive function has yet to be fully ***,the precise role of the cerebellum in patients with Parkinson’s disease and cognitive impairment remains ***,in this review,we summarize the cerebellar dopaminergic and cholinergic projections and their relationships with cognition,as reported by previous studies,and investigated the role of the cerebellum in patients with Parkinson’s disease and cognitive impairment,as determined by functional *** findings will help us to understand the role of the cerebellum in the mechanisms underlying cognitive impairment in Parkinson’s disease.

关键词： anterior brain system cerebellum cholinergic cognitive impairment dopaminergic dual syndrome hypothesis neuroimage neurotransmitter Parkinson’s disease posterior brain system therapeutic targets

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MarkNeRF:Watermarking for Neural Radiance Field

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Computers, Materials & Continua 2024年第7期80卷 1235-1250页

作者： lifeng Chen Jia Liu Wenquan Sun Weina Dong xiaozhong Pan Cryptographic Engineering Department Institute of Cryptographic EngineeringEngineering University of PAPXi’an710086China Key Laboratory of Network and Information Security of PAP Xi’an710086China

This paper presents a novel watermarking scheme designed to address the copyright protection challenges encountered with Neural radiation field(NeRF)*** employ an embedding network to integrate the watermark into the images within the training ***,theNeRFmodel is utilized for *** copyright verification,a secret image is generated by inputting a confidential viewpoint into *** this basis,design an extraction network to extract embedded watermark images fromconfidential *** the event of suspicion regarding the unauthorized usage of NeRF in a black-box scenario,the verifier can extract the watermark from the confidential viewpoint to authenticate the model’s *** experimental results demonstrate not only the production of visually appealing watermarks but also robust resistance against various types of noise attacks,thereby substantiating the effectiveness of our approach in safeguarding NeRF.

关键词： Neural radiation field 3D watermark robustness black box

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Parameter Estimation of Sub-/Super-synchronous Oscillation Based on Interpolated All-phase Fast Fourier Transform with Optimized Window Function

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1031-1041页

作者： Bo Sun xi Wu xi Chen Zixiao Zou Qiang Li Bixing Ren School of Electrical Engineering Southeast UniversityNanjingChina State Grid Jiangsu Electric Power Company Limited Research Institute NanjingChina

In recent years,with increasing amounts of renew-able energy sources connecting to power grids,sub-/super-syn-chronous oscillations(SSOs)occurred more *** to the time-variant nature of SsO magnitudes and frequencies,as well as the mutual interferences among SsO modes with close frequencies,the accurate parameter estimation of SsO has be-come a particularly challenging *** solve this issue,this paper proposes an improved spectrum analysis method by im-proving the window function and a spectrum correction method to achieve higher ***,by aiming at the sidelobe characteristics of the window function as evaluation criteria,a combined cosine function is optimized using a genetic algorithm(GA).Furthermore,the obtained window function is self-con-volved to extend its excellent characteristics,which have better performance in reducing mutual interference from other SSO ***,a new form of interpolated all-phase fast Fourier transform(IpApFFT)using the optimized window func-tion is proposed to estimate the parameters of *** meth-od allows for phase-unbiased estimation while maintaining algo-rithmic simplicity and *** performance of the pro-posed method is demonstrated under various conditions,com-pared with other estimation *** results vali-date the effectiveness and superiority of the proposed method.

关键词： Sub-/Super-synchronous oscillation(SSO) window function parameter estimation interpolated all-phase fast Fourier transform(ApFFT)

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