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Practical cloud storage auditing using serverless computing

Science China(Information Sciences) 2024年第3期67卷 33-47页

作者： Fei CHEN Jianquan CAI Tao XIANG Xiaofeng LIAO College of Computer Science and Software Engineering Shenzhen University College of Computer Science Chongqing University

Cloud storage auditing research is dedicated to solving the data integrity problem of outsourced storage on the cloud. In recent years, researchers have proposed various cloud storage auditing schemes using different techniques. While these studies are elegant in theory, they assume an ideal cloud storage model;that is, they assume that the cloud provides the storage and compute interfaces as required by the proposed schemes. However, this does not hold for mainstream cloud storage systems because these systems only provide read and write interfaces but not the compute interface. To bridge this gap, this work proposes a serverless computing-based cloud storage auditing system for existing mainstream cloud object storage. The proposed system leverages existing cloud storage auditing schemes as a basic building block and makes two adaptations. One is that we use the read interface of cloud object storage to support block data requests in a traditional cloud storage auditing scheme. Another is that we employ the serverless computing paradigm to support block data computation as traditionally required. Leveraging the characteristics of serverless computing, the proposed system realizes economical, pay-as-you-go cloud storage auditing. The proposed system also supports mainstream cloud storage upper layer applications(e.g., file preview) by not modifying the data formats when embedding authentication tags for later auditing. We prototyped and open-sourced the proposed system to a mainstream cloud service, i.e., Tencent Cloud. Experimental results show that the proposed system is efficient and promising for practical use. For 40 GB of data, auditing takes approximately 98 s using serverless computation. The economic cost is 120.48 CNY per year, of which serverless computing only accounts for 46%. In contrast, no existing studies reported cloud storage auditing results for real-world cloud services.

关键词： cloud storage auditing serverless computing object storage usability

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BIO-inspired intelligent navigation: from methodology, system theory, to behavioural science

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Science China(Information Sciences) 2024年第9期67卷 333-335页

作者： Wenshuo LI Xin LIU Pengwei HU Jian YANG Xiang YU Lei GUO Hangzhou Innovation Institute of Beihang university School of Automation Science and Electrical Engineering Beihang University School of Instrumentation and Optoelectronic Engineering Beihang University

It is crucial for unmanned systems to determine their motion information accurately, reliably, and in real time. This function is accomplished by the autonomous navigation module of the unmanned systems. By analogy to the animals,the autonomous navigation module can be regarded as the“sensory nerve center” of an unmanned system.

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Investigation of Power Density Amplification in Stacked Triboelectric Nanogenerators

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Energy & Environmental Materials 2024年第5期7卷 372-379页

作者： Fan Shen Qin Zhang Hengyu Guo Chen Cao Ying Gong Junlei Wang Yan Peng Zhongjie Li School of Mechatronic Engineering and Automation Shanghai University Department of Applied Physics Chongqing University Institute of Artificial Intelligence School of Future Technology Shanghai University School of Mechanical and Power Engineering Zhengzhou University Shanghai Artificial Intelligence Laboratory

In engineering practice, the output performance of contact separation TENGs(CS-TENGs) increases with the increase of tribo-pair area, which includes increasing the size of single layer CS-TENGs (SCS-TENGs) or the number of units (zigzag TENGs). However, such two strategies show significant differences in output power and power density. In this study, to seek a universal CS-TENG design solution, the output performance of a SCS-TENG and a zigzag TENG (Z-TENG) is systematically compared, including voltage,current, transferred charge, instantaneous power density, and charging power density. The relationship between contact area and output voltages is explored, and the output voltage equation is fitted. The experimental results reveal that SCS-TENGs yield better performance than Z-TENGs in terms of voltage, power, and power density under the same total contact area.

关键词： contact separation power density triboelectric nanogenerators zigzag

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Editorial

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Big Data Mining and Analytics 2024年第2期7卷 I0001-I0002页

作者： Kumar, Sunil Mapp, Glenford Bansal, Abhay Cengiz, Korhan university of Surrey United Kingdom Middlesex university United Kingdom Amity university India Trakya university Turkey

Advanced technologies in science explore the study of business and *** can learn from and make predictions and decisions based on collected data through intelligent *** by technological advances in Big Data,Artificial Intelligence(AI),and Machine Learning(ML),such systems potentially have many applications,roles,and impacts on business and *** stay ahead of the competition,companies must think creatively about incorporating the latest technologies like AI,ML,and Big Data into their policy.

关键词： such companies Foster

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Green solutions for sustainable development:Introduction

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Geoscience Frontiers 2024年第4期15卷 330-332页

作者： Arshian Sharif Mustafa Tevfik Kartal Ugur Korkut Pata Sunway university Malaysia European university of Lefke Türkiye Osmaniye Korkut Ata university Türkiye

The timely mitigation of the ever-increasing environmental damages induced by the use of fossil fuels created demands by dismissing the activities that irreversibly affect the environment(Kartal et al.,2023;Pata et al.,2023).In addition,there is also a need to encourage and persuade activities that generate low carbon dioxide(CO_(2))emissions and allow for sustainable *** achieve sustainable development goals(SDGs)and comply with the Paris Agreement's goals and statements,which aim to limit global warming to 1.5 ℃ and demand net-zero emissions by 2050,an alternative to fossil fuels and CO_(2)-emitting power plants is needed(Kartal et al.,2024).This alternative means relying on clean,green,and renewable energy that will eventually con-tribute to a zero-carbon *** kinds of energy include energy produced by hydro,solar,wind,biomass,biofuels,and geothermal production capacities,along with the future of nuclear fusion(Ozcan et al.,2024).However,since not all of these forms of energy have reached their technological maturity and cost-effectiveness status,therefore policymaking institutions should initiate,develop,and align the policies in supporting the production and distribution of green energy.

关键词： eventually sustainable policy

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Constrained reinforcement learning with statewise projection: a control barrier function approach

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Science China(Information Sciences) 2024年第3期67卷 136-154页

作者： Xinze JIN Kuo LI Qingshan JIA Department of Automation Tsinghua university

Safety is a critical issue for reinforcement learning(RL), as it may be risky for some actual applications if the learning process involves unsafe exploration. Instead of formulating constraints as expectationbased in constrained RL, considering statewise safety in constrained RL is more meaningful. This work aims to address the issue of safe projection in RL by introducing a control barrier function that inherently learns a safe policy through a set certificate. We seek to analyze some theoretical properties of safe projection in the learning process, including convergence and performance bound, and extend the discussion into ensembles and guided controllers. Moreover, we approach analytical solutions for deterministic and stochastic system dynamics. Experimental results in different tasks show that the proposed method achieves better effects in terms of both performance and safety.

关键词： reinforcement learning safe projection control barrier function

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Natural long-chain saturated fatty acids doped LNPs enabling spleen selective mRNA translation and potent cancer immunotherapy

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Nano Research 2024年第3期17卷 1804-1817页

作者： Fazhan Wang Meng Zhang Meiling Tian Jia Lou Longze Pan Xiaoke Gao Lijing Zhang Xiaohan Lou Linyu Zhu Yuqiao Sheng Ming Wang Rui Xue Wenjing Deng Shuai Shao Zhihai Qin Medical Research Center The First Affiliated Hospital of Zhengzhou UniversityZhengzhou UniversityZhengzhou 450052China Translational Medical Center The First Affiliated Hospital of Zhengzhou UniversityZhengzhou UniversityZhengzhou 450052China Department of Neuro-Intensive Care Unit The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Academy of Medical Sciences Zhengzhou UniversityZhengzhou 450052China

Rationally tailored lipid nanoparticles(LNPs)with efficient and tunable delivery of mRNA in vivo are crucial for mRNA *** expression of antigenic protein in lymphoid tissues/organs could improve the immunostimulatory efficacy and safety of LNPs-based mRNA *** by the metabolic behavior that long-chain saturated fatty acids tending to enter lymphoid tissue rather than the liver,we developed fatty acid-doped LNPs capable of mediating differential protein expressions in the liver and spleen when administered *** the molar ratio of saturated fatty acid located 60%–70%,the doped LNPs achieved the spleen selective mRNA *** mechanism could be attributed to the different cellular uptake behaviors of saturated fatty acids in *** with a model antigen(ovalbumin)mRNA-loaded spleen selective LNPs,we observed enhanced antigen-specific T cell immune responses,and potent immunotherapeutic and immunoprophylactic efficacy in the mouse lymphoma *** natural long-chain saturated fatty acids metabolic characteristics-inspired design of LNPs for spleen-selective mRNA vaccines delivery will provide references for designing mRNA vaccines with high efficacy and safety for tumor immunotherapy.

关键词： mRNA vaccine lipid nanoparticles spleen long-chain saturated fatty acid cancer immunotherapy

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How Emotion Nurtures Mentality:The Influencing Mechanism of Social-Emotional Competency on the Mental Health of university Students

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International Journal of Mental Health Promotion 2024年第4期26卷 303-315页

作者： Yulei Chen Zhaojun Chen Shichao Wang Yang Hang Jianpeng Guo Institute of Education Xiamen UniversityXiamen361005China Shandong Social Science Education Base Yantai Nanshan UniversityLongkou265706China

Social-Emotional Competency(SEC),regarded as a critical psychological resource for individuals to adapt to social environments,is an effective protective factor for students’mental health,impacting their future success and *** the impact of SEC on university students’mental health can offer valuable insights for nurturing talents with healthy psychological and physical *** on data from two large-scale surveys of Chinese university students,this study designed two comprehensive Multiple Mediation Models involving SEC,stress,coping strategies,and stress reaction to explore the pathway of emotion nurturing *** 1 utilized a parallel mediation model to examine the relationships between SEC,academic stress,interpersonal stress,and stress *** results indicated that SEC negatively predicted academic stress,interpersonal stress,and stress ***,academic and interpersonal stress mediated the relationships between SEC and stress reactions in *** these findings,Study 2 further investigated the role of coping *** constructing a multiple-chain mediation model,it examined the predictive relationships among SEC,academic stress,interpersonal stress,three types of coping strategies,and stress *** findings indicated that SEC negatively predicted stress,problemavoiding strategy,and stress reactions,while positively predicting problem-solving and assistant-seeking ***,the two stress types and three coping strategies significantly mediated the relationship between SEC and stress *** indicated that higher SEC was associated with reduced stress and more adaptive coping strategies and subsequently contributed to more favorable stress *** research explored the impact of university students’SEC on mental health and its relational mechanisms,aiming to provide theoretical reference and practical insights for future efforts in cultivating SEC among uni

关键词： Social-Emotional Competency academic stress interpersonal stress stress reaction coping strategies Multiple Mediation Model

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CF-DAN: Facial-expression recognition based on cross-fusion dual-attention network

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Computational Visual Media 2024年第3期10卷 593-608页

作者： Fan Zhang Gongguan Chen Hua Wang Caiming Zhang Shandong Technology and Business university Shandong 264005China School of Information and Electrical Engineering Ludong UniversityYantai 264025China Shangdong university Shandong 250100China

Recently, facial-expression recognition (FER)has primarily focused on images in the wild, includingfactors such as face occlusion and image blurring, ratherthan laboratory images. Complex field environmentshave introduced new challenges to FER. To addressthese challenges, this study proposes a cross-fusion dualattention network. The network comprises three parts:(1) a cross-fusion grouped dual-attention mechanism torefine local features and obtain global information;(2) aproposed C2 activation function construction method,which is a piecewise cubic polynomial with threedegrees of freedom, requiring less computation withimproved ﬂexibility and recognition abilities, whichcan better address slow running speeds and neuroninactivation problems;and (3) a closed-loop operationbetween the self-attention distillation process andresidual connections to suppress redundant informationand improve the generalization ability of the *** recognition accuracies on the RAF-DB, FERPlus,and AffectNet datasets were 92.78%, 92.02%, and63.58%, respectively. Experiments show that this modelcan provide more effective solutions for FER tasks.

关键词： facial-expression recognition(FER) cubic polynomial activation function dualattention mechanism interactive learning self-attention distillation

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A method for active deception jamming discrimination based on frequency response

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Chinese Journal of Aeronautics 2024年第6期37卷 331-347页

作者： Wenbin WEI Ruihui PENG Yunlong DONG Dianxing SUN Le XU Guohong WANG Qingdao Innovation and Development Base of Harbin Engineering university Harbin Engineering University150001China Institute of Information Fusion Navy Aeronautical UniversityYantai 264001China

There are many types of radar active deception false target jamming that are highly correlated with the real *** the real and false targets under a low Signal-to-Noise Ratio(SNR)is *** solve the above problem,this article proposes a real/false target recognition method based on the features of multi-pulse joint frequency response by analyzing the differences in the scattering characteristics and modeling real target echoes as a synthesis of multi-scattering center ***,in the range-doppler domain,the real and false targets are truncated along the range dimension,and a fast Fourier transform is performed to extract the features of multi-pulse joint frequency ***,a two-channel feature fusion network is designed for real and false target ***,a Multi-Coherent Processing Interval Joint Decision Method(M-CPIJDM)based on temporal information is proposed to improve the recognition *** using the measured data show that the proposed method can well recognize real and false target signals under four jamming backgrounds:distance false target,velocity false target,distance-velocity composite false target,and forwarding dense false target.

关键词： Activedeception false target jamming Multi-scattering center echo Multi-pulse jointfrequency response feature Two-channelfeature fusion network Multi-coherent processing interval jointdecision

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