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Image Hiding with High Robustness Based on Dynamic Region Attention in the Wavelet Domain

Computer Modeling in Engineering & Sciences 2024年第10期141卷 847-869页

作者： Zengxiang Li Yongchong wu Alanoud Al Mazroa Donghua Jiang Jianhua wu Xishun Zhu department of Information Engineering Gongqing CollegeNanchang UniversityJiujiang332020China School of Information Engineering Gongqing Institute of Science and TechnologyJiujiang332020China department of Information Systems College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityRiyadh11671Saudi Arabia School of Computer Science and Engineering Sun Yat-sen UniversityGuangzhou511400China School of Information Engineering Nanchang UniversityNanchang330031China School of mathematics and Statistics Hainan Normal UniversityHaikou571158China

Hidden capacity,concealment,security,and robustness are essential indicators of hiding ***,hiding algorithms tend to focus on algorithmic capacity,concealment,and security but often overlook the robustness of the *** practical applications,the container can suffer from damage caused by noise,cropping,and other attacks during transmission,resulting in challenging or even impossible complete recovery of the secret *** image hiding algorithm based on dynamic region attention in the multi-scale wavelet domain is proposed to address this issue and enhance the robustness of hiding *** this proposed algorithm,a secret image of size 2.6×2.6 is first decomposed using an eight-level Haar wavelet *** wavelet transform generates one coefficient in the approximation component and twenty-four detail bands,which are then embedded into the carrier image via a hiding *** the recovery process,the container image is divided into four non-overlapping parts,each employed to reconstruct a low-resolution secret *** lowresolution secret images are combined using densemodules to obtain a high-quality secret *** experimental results showed that even under destructive attacks on the container image,the proposed algorithm is successful in recovering a high-quality secret image,indicating that the algorithm exhibits a high degree of robustness against various *** proposed algorithm effectively addresses the robustness issue by incorporating both spatial and channel attention mechanisms in the multi-scale wavelet domain,making it suitable for practical *** conclusion,the image hiding algorithm introduced in this study offers significant improvements in robustness compared to existing *** ability to recover high-quality secret images even in the presence of destructive attacksmakes it an attractive option for various *** research and experimentation can explore the algorith

关键词： Image hiding robustness wavelet transform dynamic region attention

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Analytic Solutions of Klein-gordon Equation and Generalized Schrdinger Equation

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Chinese Quarterly Journal of mathematics 2003年第3期18卷 310-314页

作者： wu Jing_zhu,DUAN Guang_sen (department of {2., Zhoukou normal College, Zhoukou 466 000, china)

Analytic solutions of Klein_gordon equat ionu tt -(u xx +u yy )+α 2.+g(uu *)u=0and generalized Schrdinger equationiu t+u xx -u yy +g(uu *)u=0are given when g(z)=Aln 2.+Blnz+C.

关键词： Klein_gordon equation generalized Schrdinger equation analytic solution

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Cosmological interpretation for the stochastic signal in pulsar timing arrays

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Science china(Physics,Mechanics & Astronomy) 2024年第4期67卷 43-50页

作者： Yu-Mei wu Zu-Cheng Chen Qing-Guo Huang School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China department of Astronomy Beijing Normal UniversityBeijing 100875China Advanced Institute of Natural Sciences Beijing Normal UniversityZhuhai 519087China department of Physics and Synergistic Innovation Center for Quantum Effects and Applications Hunan Normal UniversityChangsha 410081China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China

The pulsar timing array(PTA)collaborations have recently reported compelling evidence for a stochastic signal consistent with a gravitational-wave *** this paper,we combine the latest data sets from NANOGrav,PPTA,and EPTA to explore cosmological interpretations for the PTA signal from first-order phase transitions,domain walls,and cosmic strings,*** find that the domain wall model is strongly disfavored with the Bayes factors compared with the first-order phase transitions and cosmic strings being 1/90 and 1/189,respectively,breaking the degeneracy among these models in individual data *** also find that:(1)a strong phase transition at temperatures below the electroweak scale is favored,and the bubble collisions make the dominant contribution to the energy density spectrum;(2.a small reconnection probability p<1.55×10^(-1)allowed by strings in(super)string theory is favored at the 95%confidence level,and ground-based detectors can further constrain the parameter space.

关键词： puslar timing arrays gravitational-wave background first-order phase transitions domain walls cosmic strings

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Discovery and character of the Kunlun-Yellow River Movement

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Chinese Science Bulletin 1998年第10期43卷 833-836页

作者： CUI Zhijiu 1, wu Yongqiu 2.3 and LIU Gengnian 1 1. department of Geography, Peking University, Beijing 100871, {2. 2. Open Research Laboratory of Environmental Changes and Natural Disaster of State Education Commission, Beijing 100875, {2. department of Geography Peking University Beijing China Open Research Laboratory of Environmental Changes and Natural Disaster of State Education Commission Beijing China department of Geography Sichuan Normal Uni-versity Chengdu China

Based on geomorphological, tectonic and sedimentary data, a Kunlun Yellow River Tectonic Movement has been recognized in 1 10-0 60 Ma B.P. This tectonic movement, which leads to uplift of the Qinghai_Xizang (Tibet) Plateau from 1 500 to 3 000-3 500 m, is periodic, abrupt and changeable in the movement rate of uplifting and slide slipping.

关键词： Kunlun Mountain Pass 700 kaB.P. tectonic movement.

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Latest cosmological constraints on Cardassian expansion models including the updated gamma-ray bursts

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Research in Astronomy and Astrophysics 2011年第9期11卷 1019-1030页

作者： Nan Liang Pu-Xun wu Zong-Hong Zhu department of Astronomy Beijing Normal University Beijing 100875 China Center for High Energy Physics Peking University Beijing 100871 China Center of Nonlinear Science and department of Physics Ningbo University Ningbo 315211 China

We constrain the Cardassian expansion models from the latest observa- tions, including the updated Gamma-ray bursts （GRBs）, which are calibrated using a cosmology independent method from the Union2.compilation of type Ia supernovae （SNe Ia）. By combining the GRB data with the joint observations from the Union2.SNe Ia set, along with the results from the Cosmic Microwave Background radia- tion observation from the seven-year Wilkinson Microwave Anisotropy Probe and the baryonic acoustic oscillation observation galaxy sample from the spectroscopic Sloan Digital Sky Survey Data Release. we find significant constraints on the model oarameters of the original Cardassian model ΩM0=0.2.2.0.014^0.015,n=0.03-0.05^＋0.05 and n=-0.16-3.2.^＋0.2.,β=0.76-0.58^＋0.34 of the modified polytropic Cardassian model, which are consistent with the ACDM model in a l-or confidence region. From the reconstruction of the deceleration parameter q（z） in Cardassian models, we obtain the transition redshift ZT = 0.73 ± 0.04 for the original Cardassian model and ZT = 0.68 ± 0.04 for the modified polytropic Cardassian model.

关键词： gamma-rays bursts -- cosmology cosmological parameters

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Study of evolution forecast of the area of the Huanghe River mouth

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Acta Oceanologica Sinica 1993年第2期12卷 249-259页

作者： Guo Yongsheng, Xu Xuegong, Fan Zhaomu, wu Peihong and Zhu Xiaoge department of Geography, {2. normal University, Jinan 2.0014, china department of Geography, Peking University, Beijing 100871, china Remote Sensing Geology department, Oil Exploration and Exploitation Scientific Research Institute, Beijing 100083, china department of Geography Shangdong Normal University Linan 250014 China China

From 1979 to 1989, the current Qingshuigou course of the Huanghe River formed a sub - delta which resembles a beak extending into the Laizhou Bay. It covers 618 km2.in area. To meet the needs of developing and constructing the Huanghe River Delta and under the presupposition of keeping the current course for 15-2. a, we forecast mainly by using the OM (1, 1) model that the front border of the sub-delta will be close to 119°30'E and its area will become 92. km2.y the end of the year 2.00. The Huanghe River will make land 760 km2.in area.

关键词： Huanghe River mouth Markov chain forecasting method of grey number series

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Quality evaluation for air plasma spray thermal barrier coatings with pulsed thermography

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Progress in Natural Science:Materials International 2011年第4期21卷 301-306页

作者： Shi-bin ZHAO~1,Cun-lin ZHANG~2.Nai-ming wu~3,Hua-ming WANG~1 1.School of Materials Science and Engineering,Beihang University,Beijing 100191,china 2.{2. of Physics,Capital normal University,Beijing 100048,china 3.School of Jet Propulsion,Beihang University,Beijing 100191,china [a] School of Materials Science and Engineering Beihang University Beijing 100191 China [b] department of Physics Capital Normal University Beijing 100048 China [c] School of Jet Propulsion Beihang University Beijing 100191 China

Pulsed thermography(PT) as a non-contact non-destructive evaluation(NDE) technique was employed to examine as-sprayed air plasma spray(APS) thermal barrier coatings(TBCs) for quality *** and micro-structural characteristics play a vital role in determining the *** this paper,PT logarithmic peak second-derivative method was adopted to measure the thickness of top *** dependent thermal images were used to characterize the microstructure which was confirmed by scanning electron microscope(SEM).The results showed that there was relationship between the temperature distribution of the surface and microstructure change in *** distribution in thermal images and measurement results of thickness were in fairly good agreement with the microstructure *** can be concluded that it was possible to employ these NDE methods as quality evaluation for as-sprayed TBCs.

关键词： thermal barrier coatings(TBCs) non-destructive evaluation(NDE) pulsed thermography microstructure thickness measurement

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Unique Genetic Features of Lean NAFLD: A Review of Mechanisms and Clinical Implications

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Journal of Clinical and Translational Hepatology 2024年第1期12卷 70-78页

作者： Jasmine Tidwell George Y.wu department of Medicine University of Connecticut Health CenterFarmingtonCTUSA Division of Gastroenterology-Hepatology University of Connecticut Health CenterFarmingtonCTUSA

Non-alcoholic fatty liver disease(NAFLD)affects 2.%of the global *** 2.%have a normal body mass index(BMI)and a variant known as lean *** typical NAFLD cases associated with obesity and diabetes,lean NAFLD causes liver disease by mechanisms not related to excess weight or insulin *** disorders are among the major factors in developing lean NAFLD,and genome-wide association studies have identified several genes associated with the *** review aims to increase awareness by describing the genetic markers linked to NAFLD and the defects involved in developing lean NAFLD.

关键词： Lean nonalcoholic fatty liver disease Palatine-like phospholipase domain-containing-3 Transmembrane 6 superfamily member 2 Familial hypobetalipoproteinemia Abetalipoproteinemia

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Effect of excess Y_2._3 addition on the physical properties of melt processed YBCO bulks

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Science china(Physics,Mechanics & Astronomy) 2004年第1期47卷 17-23页

作者： YANG Wanmin1,2.3, ZHOU Lian2. FENG Yong2. ZHANG Pingxiang2. wu Minzhi3 & W. GAWALEK3 1. department of Physics, Shaanxi {2. University, Xi抋n 710062. china 2. Northwest Institute for Nonferrous Metal Research. Xi抋n 710016, china 3. Institute fur Physikalische Hochtechnologie e.V(IPHT), Jena, Germany Correspondence should be addressed to Yang Wanmin (email: wm-yang@***) Received June 2., 2.03 1. department of Physics Shaanxi Normal University 710062 Xi’an China 2. Northwest Institute for Nonferrous Metal Research 710016 Xi’an China 3. Institute fur Physikalische Hochtechnologie e.V (IPHT) Jena Germany

The YBCO superconductors with Y2.3 addition were prepared by a modified melt textured process and the effects of excess Y2.3 addition on the physical properties of melt textured YBCO have been investigated. It is found that the melt temperature of YBCO samples decreases drastically with the increasing Y2.3, and the maximum levitation forces are drastically different for samples with different Y2.3 addition. It is also found that the optimal Y2.3 addition to YBCO is about 10wt%. Considering the microstructure and the starting composition, the results are well discussed and interpreted.

关键词： YBCO superconductor, melt growth, Y2.3 addition, levitation force.

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AVERAGE σ-WIDTHS OF THE UNIT BALL OF I_1~∞(R)IN I_2.∞(R)

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Analysis in Theory and Applications 1994年第2期10卷 92-104页

作者： wu Huoxiong Beijing normal University, {2. department of mathematics Chenzhou normal College, Hunan, 42.000 P R {2.

In this paper we study the average σ-K width and the average σ-linear width of the unit ball of l;（R） inl;（R）. The exact values of these widths are calculated and an optimal subspace with the optimal linear oper... 详细信息

关键词： Math WIDTHS OF THE UNIT BALL OF I1 AVERAGE R)IN I2 APPI 飞飞

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