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A Linked List Encryption Scheme for Image Steganography without Embedding

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Computer Modeling in Engineering & Sciences 2024年第10期141卷 331-352页

作者： Pengbiao Zhao Qi Zhong Jingxue Chen xiaopei Wang Zhen Qin Erqiang Zhou Network and Data Security Key Laboratory of Sichuan Province University of Electronic Science and Technology of ChinaChengdu610054China Faculty of Data Science City University of MacaoMacao999078China Department of Computer Science and Engineering University of CaliforniaRiversideCA 92521USA

Information steganography has received more and more attention from scholars nowadays,especially in the area of image steganography,which uses image content to transmit information and makes the existence of secret information *** enhance concealment and security,the Steganography without Embedding(SWE)method has proven effective in avoiding image distortion resulting from cover *** this paper,a novel encrypted communication scheme for image SWE is *** reconstructs the image into a multi-linked list structure consisting of numerous nodes,where each pixel is transformed into a single node with data and pointer *** employing a special addressing algorithm,the optimal linked list corresponding to the secret information can be *** receiver can restore the secretmessage fromthe received image using only the list header position *** scheme is based on the concept of coverless steganography,eliminating the need for any modifications to the cover *** boasts high concealment and security,along with a complete message restoration rate,making it resistant to ***,this paper proposes linked-list construction schemeswithin theproposedframework,which caneffectively resist a variety of attacks,includingnoise attacks and image compression,demonstrating a certain degree of *** validate the proposed framework,practical tests and comparisons are conducted using multiple *** results affirm the framework’s commendable performance in terms of message reduction rate,hidden writing capacity,and robustness against diverse attacks.

关键词： Steganography encryption steganography without embedding coverless steganography

DIFFERENTIABILITY FOR THE HIGH DIMENSIONAL POLYNOMIAL-LIKE ITERATIVE EQUATION

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Acta Mathematica Scientia 2005年第1期25卷 130-136页

作者：李晓培邓圣福 Deportment of Mathematics Sichuan University Chengdu 610064 China

This paper studies the smoothness of solutions of the higher dimensional polynomial-like iterative equation. The methods given by Zhang Weinian([7]) and by Kulczvcki M, Tabor j.([3]) are improved by constructing a new operator for the structure of the equation in order to apply fixed point theorems. Existence, uniqueness and stability of continuously differentiable solutions are given.

关键词： iteration fixed point theorem differentiable solutions existence uniqueness stability

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论运输业增加值核算

辽宁交通科技 2002年第1期25卷 45-46页

作者：邓晓沛沈阳市公路规划设计院沈阳110011

运输业增加值是我国新国民经济核算体系所设部门增加值新指标与传统的运输业产值指标--运输业总产值和净产值相比,其存在问题较多.

关键词：运输业增加值交通运输业经济核算体系核算方法分配法

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我国大气污染的成因及治理措施

环境与发展 2013年第2期25卷 118-120页

作者：邓晓蓓阜阳市环境监测站安徽236000

工业和交通运输业迅速发展以及化石燃料的大量使用,将粉尘、硫氧化物、氮氧化物、碳氧化物、臭氧等物质排入大气层,使大气质量严重恶化。人类需要发展但更需要保护环境,如何保护好环境是人们共同关心的问题。主要针对大气污染的成因及... 详细信息

工业和交通运输业迅速发展以及化石燃料的大量使用,将粉尘、硫氧化物、氮氧化物、碳氧化物、臭氧等物质排入大气层,使大气质量严重恶化。人类需要发展但更需要保护环境,如何保护好环境是人们共同关心的问题。主要针对大气污染的成因及治理措施进行了初步探索。

关键词：大气污染成因分析治理措施

Potential impact of specific therapy on pregnant women with pulmonary arterial hypertension without cardiac shunt:a descriptive study in northern China

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Emergency and Critical Care Medicine 2024年第2期4卷 60-66页

作者： Weida Lu Min Li Fuqing Ji Hua Feng Guo Li Qiushang Ji Hongyu Zhang xiaopei Cui Department of Geriatric Medicine&Shandong Key Laboratory Cardiovascular Proteomics Qilu Hospital of Shandong UniversityJinanShandongChina Intensive Care Unit of Cardiac Surgery Shandong Provincial Qianfoshan Hospitalthe First Hospital Affiliated with Shandong First Medical UniversityAffiliated Hospital of Shandong UniversityJinanShandongChina Department of Cardiology Linyi Central HospitalLinyiShandongChina Department of Gastroenterology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandongChina Department of Pulmonary and Critical Care Medicine the Affiliated Hospital of Qingdao UniversityQingdaoShandongChina Department of Cardiology Qilu Hospital of Shandong UniversityJinanShandongChina

Background:Pregnancy in women with pulmonary arterial hypertension(PAH)is a fatal condition,despite the effectiveness of PAH-specific *** coverage status and effect of specific therapies in pregnant patients with PAH without cardiac shunts in China remain *** investigate this issue,we conducted a multicenter retrospective study in northern ***:The study included 85 patients who were admitted to 4 clinical centers in Shandong Province between October 2010 and August *** endpoint events included(1)maternal death and/or(2)major adverse cardiac events,both occurring during pregnancy or within 6 weeks ***:Although the overall mortality rate was encouraging(11.8%),the number of patients receiving PAH-specific therapies was extremely low(28.2%).Moreover,only 15.3%of patients received adequate duration of PAH-specific therapy(≥4 weeks)before delivery,and this subgroup showed the lowest major adverse cardiac events rate(7.7%)compared with that in the untreated(19.7%)and short-time treated groups(<4 weeks;54.5%).Conclusion:Pregnant patients with PAH without cardiac shunts face significantly increased mortality ***-term PAH-specific therapy does not guarantee favorable maternal *** screening,early identification,and timely intervention are expected to improve maternal outcomes in pregnant women with PAH.

关键词： Major adverse cardiac events Maternal mortality Pregnancy outcome Pulmonary arterial hypertension Specific therapy

Specific metabolic impairments indicate loss of sustained liver improvements in metabolic dysfunction-associated steatotic liver disease treatment

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Hepatobiliary Surgery and Nutrition 2024年第4期13卷 632-649,I0025-I0035页

作者： Ling Luo Junzhao Ye Shuyu Zhuo Bo Ma Weiyi Mai xiaopei Cao Liuqin Liang Wei Wang Shiting Feng Zhi Dong Bihui Zhong Department of Gastroenterology The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Department of Nutrition The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Department of Gastroenterology The East Division of the First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Department of Cardiology The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Department of Endocrinology The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Department of Rheumatology The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Department of Ultrasound The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Department of Radiology The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina

Background:High liver fat content(LFC)induces increased risks of both hepatic and extrahepatic progression in metabolic dysfunction-associated steatotic liver disease(MASLD),while maintaining a significant decline in magnetic resonance imaging-based proton density fat fraction(MRI-PDFF)(≥30%decline relative to baseline)without worsening fibrosis results in improved histological severity and ***,the factors associated with the loss of sustained responses to treatment remain unclear,and we aim to identify ***:Consecutive treatment-naïve MASLD patients between January 2015 and February 2022,with follow-up until April 2023,were included in this prospective cohort *** quantified by MRI-PDFF and liver stiffness measurements(LSM)determined by two-dimensional shear wave elastography(2D-SWE)were evaluated at weeks 0,24 and ***-PDFF response was defined as a≥30%relative decline in PDFF values,and LSM response was defined as a≥1 stage decline from ***:A total of 602 MASLD patients were *** the 303 patients with a 24-week MRI-PDFF response and complete follow-up of 48 weeks,the rate of loss of MRI-PDFF response was 29.4%,and multivariable logistic regression analyses showed that 24-week insulin resistance(IR),still regular exercise and caloric restriction after 24 weeks,and the relative decline in LFC were risk factors for loss of MRI-PDFF *** of LSM response at 48 weeks occurred in 15.9%of patients,and multivariable analysis confirmed 24-week serum total bile acid(TBA)levels and the relative decline in TBA from baseline as independent *** significant association was found at 48 weeks between loss of MRI-PDFF response and loss of LSM ***:MASLD patients with IR and high TBA levels are at higher risks of subsequent diminished sustained improvements of steatosis and fibrosis,respectively.

关键词： Metabolic dysfunction-associated steatotic liver disease(MASLD) loss of response magnetic resonance imaging-based proton density fat fraction response(MRI-PDFF response) liver stiffness measurements response(LSM response)

利用黏-弹-塑性模型对磁流变阻尼器动力学性能预测与分析

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机械科学与技术 2024年第5期43卷 798-804页

作者：罗肖培河北化工医药职业技术学院石家庄050026

为了建模合适的参数模型来描述阻尼器的动态输出特性,发挥磁流变阻尼器工程应用中的半主动控制优势。本文的研究在激励频率和振幅为5 Hz和10 mm条件下,利用振动系统测试磁流变阻尼器在不同激励电流下得到动态输出特性,在此基础上利用黏-... 详细信息

为了建模合适的参数模型来描述阻尼器的动态输出特性,发挥磁流变阻尼器工程应用中的半主动控制优势。本文的研究在激励频率和振幅为5 Hz和10 mm条件下,利用振动系统测试磁流变阻尼器在不同激励电流下得到动态输出特性,在此基础上利用黏-弹-塑性参数模型,采用果蝇优化算法对所有电流下的实测结果进行预测并对其结果展开分析讨论。研究结果表明该阻尼器的输出力能够跟随外部位移随时间变化情况;阻尼力随激励电流增大表现出先缓慢增大后显著增大的特性,这表明该阻尼器具有依赖输入电流的可控性,为实现工程应用中的半主动控制提供条件。并讨论了产生这种现象的原因在于不同电流下颗粒于基体间的相互作用。预测结果表明利用果蝇优化算法,黏-弹-塑性参数模型能够很好的描述实测结果。

关键词：磁流变阻尼器半主动控制果蝇优化算法黏-弹-塑性模型

幼小衔接视域下幼儿园家园协作的意义、内容和路径

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学前教育研究 2024年第4期 91-94页

作者：赵筱培徐州市第一实验幼儿园徐州221006

幼小衔接工作需要家长和幼儿园共同努力才能取得实效。家园协作能够更好地帮助儿童经验的连续发展,可以帮助学前儿童从生活、学习和社会交往等方面做好入学准备。幼儿园教师和家长应共同讨论和研究学前儿童的身心发展特征以及小学的学... 详细信息

幼小衔接工作需要家长和幼儿园共同努力才能取得实效。家园协作能够更好地帮助儿童经验的连续发展,可以帮助学前儿童从生活、学习和社会交往等方面做好入学准备。幼儿园教师和家长应共同讨论和研究学前儿童的身心发展特征以及小学的学习要求,建构常态化的幼小衔接家园协作工作机制,建立科学的幼小衔接家园协作工作目标,通过建设幼小衔接教育资源库来提升对家园协作工作的支持性,保障家园协作的有效性。

关键词：幼小衔接家园协作入学适应

基于热流固耦合的桥隧过渡段无砟轨道空间温度场分析

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华中科技大学学报（自然科学版） 2024年第2期52卷 127-133页

作者：陈泽林蔡小培张乾赵磊北京交通大学土木建筑工程学院北京100044 中国铁道科学研究院集团有限公司铁道建筑研究所北京100081

为揭示日照辐射下高速铁路桥隧过渡段无砟轨道温度场的遮挡效应及时空分布特征,基于日照辐射-大气环境-无砟轨道及下部基础三维热流固耦合方法,建立了过渡段无砟轨道日照辐射模型,实现了日照阴影的实时动态识别,并通过现场实测验证了模... 详细信息

为揭示日照辐射下高速铁路桥隧过渡段无砟轨道温度场的遮挡效应及时空分布特征,基于日照辐射-大气环境-无砟轨道及下部基础三维热流固耦合方法,建立了过渡段无砟轨道日照辐射模型,实现了日照阴影的实时动态识别,并通过现场实测验证了模型有效性.结果表明:采用三维热流固多场耦合方法,实现了过渡段无砟轨道三维温度场的精细化求解;日照辐射下,过渡段无砟轨道沿线路纵向温度差达到25.26℃,距隧道口16 m范围内遮挡效应显著;随着隧道纵深增加,过渡段无砟轨道温度变化趋缓,距隧道口超过44 m后,无砟轨道温度基本稳定;一天中无砟轨道纵向温度梯度峰值呈现先增大后减小的变化规律,在14:00达到最值4.82℃/m;桥隧过渡段无砟轨道温度波动幅值大、纵向波动范围小,建议采用分段函数拟合温度纵向分布.

关键词：无砟轨道桥隧过渡段阴影识别三维温度场热流固耦合