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MLDA:a multi-level k-degree anonymity scheme on directed social network graphs

Frontiers of Computer Science 2024年第2期18卷 199-215页

作者： Yuanjing HAO long LI Liang CHANG Tianlong GU Guangxi Key Laboratory of Trusted Software Guilin University of Electronic TechnologyGuilin 541004China Engineering Research Center of Trustworthy AI(Ministry of Education) Jinan UniversityGuangzhou 510632China

With the emergence of network-centric data,social network graph publishing is conducive to data analysts to mine the value of social networks,analyze the social behavior of individuals or groups,implement personalized recommendations,and so ***,published social network graphs are often subject to re-identification attacks from adversaries,which results in the leakage of users’***-anonymity technology is widely used in the field of graph publishing,which is quite effective to resist re-identification ***,the current researches still exist some issues to be solved:the protection of directed graphs is less concerned than that of undirected graphs;the protection of graph structure is often ignored while achieving the protection of nodes’identities;the same protection is performed for different users,which doesn’t meet the different privacy requirements of ***,to address the above issues,a multi-level-degree anonymity(MLDA)scheme on directed social network graphs is proposed in this ***,node sets with different importance are divided by the firefly algorithm and constrained connectedness upper approximation,and they are performed different-degree anonymity protection to meet the different privacy requirements of ***,a new graph anonymity method is proposed,which achieves the addition and removal of edges with the help of fake *** addition,to improve the utility of the anonymized graph,a new edge cost criterion is proposed,which is used to select the most appropriate edge to be ***,to protect the community structure of the original graph as much as possible,fake nodes contained in a same community are merged prior to fake nodes contained in different *** results on real datasets show that the newly proposed MLDA scheme is effective to balance the privacy and utility of the anonymized graph.

关键词： directed social network graph graph publishing k-degree anonymity community structure graph utility

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Covariate-Assisted Matrix Completion with Multiple Structural Breaks

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Journal of Systems Science & Complexity 2024年第2期37卷 692-728页

作者： MENG Jing FENG long ZOU Changliang WANG Zhaojun School of Statistics and Data Science KLMDASRLEBPSand LPMCNankai UniversityTianjin 300071China

In matrix completion,additional covariates often provide valuable information for completing the unobserved entries of a high-dimensional low-rank matrix *** this paper,the authors consider the matrix recovery problem when there are multiple structural breaks in the coefficient matrix β under the column-space-decomposition model A=Xβ+B.A cumulative sum(CUSUM)statistic is constructed based on the penalized estimation of β.Then the CUSUM is incorporated into the Wild Binary Segmentation(WBS)algorithm to consistently estimate the location of ***,a nearly-optimal recovery of A is *** findings are further corroborated via numerical experiments and a real-data application.

关键词： Additional covariates matrix completion multiple structural breaks wild Binary Segmentation

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Design and Control of an Autonomous Bat-like Perching UAV

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Journal of Bionic Engineering 2024年第3期21卷 1253-1264页

作者： long Bai Wei Wang Xiaohong Chen Yuanxi Sun State Key Laboratory of Mechanical Transmission Chongqing UniversityChongqing400044China

Perching allows small Unmanned Aerial Vehicles(UAVs)to maintain their altitude while significantly extending their flight duration and reducing ***,current research on flying habitats is poorly adapted to unstructured environments,and lacks autonomous capabilities,requiring ideal experimental environments and remote control by *** solve these problems,in this paper,we propose a bat-like UAV perching mechanism by investigating the bat upside-down perching method,which realizes double self-locking in the perching state using the ratchet and four-link dead point *** on this perching mechanism,this study proposes a control strategy for UAVs to track targets and accomplish flight perching autonomously by combining a binocular camera,single-point LiDAR,and pressure *** perching experiments were conducted for crossbar-type objects *** experimental results show that a multirotor UAV equipped with the perching mechanism and sensors can reliably achieve autonomous flight perching and re-flying off the target *** power consumption is reduced to 2.9%of the hovering state when perched on the target object.

关键词： Bio-inspired design Perching mechanism UAV Autonomous flight

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杂多酸离子液体催化木质素C—O键和苯环氧化裂解

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化工学报 2020年第12期71卷 5541-5550页

作者：林泽英郑歆来龙金星刘思洁李雪辉华南理工大学化学与化工学院制浆造纸工程国家重点实验室广东广州510640

木质素是自然界中含量最丰富的可再生芳香聚合物,具备取代或部分替代石油用于生产大宗化学品的潜力。然而,由于木质素复杂的分子结构和化学键连接方式,当前木质素综合利用技术普遍存在目标产物选择性低等问题。因此,新型催化体系的研究... 详细信息

木质素是自然界中含量最丰富的可再生芳香聚合物,具备取代或部分替代石油用于生产大宗化学品的潜力。然而,由于木质素复杂的分子结构和化学键连接方式,当前木质素综合利用技术普遍存在目标产物选择性低等问题。因此,新型催化体系的研究对于设计与开发木质素高效转化过程具有重要意义。利用一种新型高效的杂多酸离子液体催化体系,通过选择性氧化裂解木质素的C—O键和苯环,将木质素转化为重要化工产品马来酸二乙酯,并提出了可能的反应机理。研究结果表明,当以含有β-O-4连接的典型木质素模型化合物4-甲氧基-α-[(2-甲氧基苯氧基)甲基]-苯甲醇为反应底物时,在杂多酸离子液体催化剂[BSmim]CuH2PMo10V2O40的作用下,180℃下反应5 h后,上述木质素模型化合物转化率可达到98.5%,得到84.3%(质量)和62.2%的马来酸二乙酯收率和选择性。同时,杂多酸离子液体可以通过温度的调节实现与产物的分离,简化了催化剂的回收过程,而且该催化剂具有良好的循环使用性能,重复使用6次后仍表现出较好的催化活性。

关键词：杂多酸离子液体木质素马来酸二乙酯氧化选择性

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Enhanced Sensing Mechanism Based on Shifting an Exceptional Point

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Research 2024年第3期6卷 285-292页

作者： Xuan Mao Guo-Qing Qin Hao Zhang Bo-Yang Wang Dan long Gui-Qin Li Gui-Lu long Department of Physics State Key Laboratory of Low-Dimensional Quantum PhysicsTsinghua UniversityBeijing 100084China Beijing Institute of Radio Measurement The Second Academy of China Aerospace Science and Industry Corporation(CASIC)Beijing 100854China Purple Mountain Laboratories Nanjing 21111China Frontier Science Center for Quantum Information Beijing 100084China Beijing Academy of Quantum Information Sciences Beijing 100193China

Non-Hermitian systems associated with exceptional points (EPs) are expected to demonstrate a giant response enhancement for various sensors. The widely investigated enhancement mechanism based on diverging from an EP should destroy the EP and further limits its applications for multiple sensing scenarios in a time sequence. To break the above limit, here, we proposed a new enhanced sensing mechanism based on shifting an EP. Different from the mechanism of diverging from an EP, our scheme is an EP nondemolition and the giant enhancement of response is acquired by a slight shift of the EP along the parameter axis induced by perturbation. The new sensing mechanism can promise the most effective response enhancement for all sensors in the case of multiple sensing in a time sequence. To verify our sensing mechanism, we construct a mass sensor and a gyroscope with concrete physical implementations. Our work will deepen the understanding of EP-based sensing and inspire designing various high-sensitivity sensors in different physical systems.

关键词： mechanism shifting exceptional

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Infinitely many dichotomous solutions for the Schrödinger-Poisson system

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Science China Mathematics 2024年第9期67卷 2049-2070页

作者： Yuke He Benniao Li Wei long School of Mathematics and Statistics and Jiangxi Provincial Center for Applied Mathematics Jiangxi Normal UniversityNanchang 330022China

In this paper,we consider the following Schrodinger-Poisson system{-ε^(2)Δu+V(x)u+K(x)Φ(x)u=|u|^(p-1)u in R^(N),-ΔΦ(x)=K(x)u^(2)in RN,,where e is a small parameter,1 详细信息

In this paper,we consider the following Schrodinger-Poisson system{-ε^(2)Δu+V(x)u+K(x)Φ(x)u=|u|^(p-1)u in R^(N),-ΔΦ(x)=K(x)u^(2)in RN,,where e is a small parameter,1

关键词： dichotomous solutions non-degeneracy Schrodinger-Poisson system

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High-resolution spatiotemporal mapping:a comprehensive view of eukaryotic cell cycle proteome dynamics

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2354-2356页

作者： Jing Zou Ziran Qin long Zhang Life Sciences Institute Second Affiliated Hospital of the Zhejiang University School of MedicineThe MOE Key Laboratory of Biosystems Homeostasis&Protection and Zhejiang Provincial Key Laboratory for Cancer Molecular Cell BiologyZhejiang UniversityHangzhouZhejiangChina The MOE Basic Research and Innovation Center for the Targeted Therapeutics of Solid Tumors The First Affiliated HospitalJiangxi Medical CollegeNanchang UniversityNanchangChina Cancer Center Zhejiang UniversityHangzhouZhejiangChina

In a recent study published in Cell,Litsios et *** a highresolution spatiotemporal map of the eukaryotic cell cycle proteome.1 They identified proteome-level changes in both abundance and spatial distribution throughout the cell cycle and provided a valuable resource for future exploration into the global proteome dynamics that drive cell cycle progression(https://***/cellcycle).

关键词： al. cycle dynamics

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Integrating machine learning and genome editing for crop improvement

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aBIOTECH 2024年第2期5卷 262-277页

作者： long Chen Guanqing Liu Tao Zhang Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding Laboratory/Key Laboratory of Plant Functional Genomics of the Ministry of Education Agricultural College of Yangzhou UniversityYangzhou 225009China Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Jiangsu Key Laboratory of Crop Genetics and Physiology Yangzhou UniversityYangzhou 225009China

Genome editing is a promising technique that has been broadly utilized for basic gene function studies and trait ***,the exponential growth of computational power and big data now promote the application of machine learning for biological *** this regard,machine learning shows great potential in the refinement of genome editing systems and crop ***,we review the advances of machine learning to genome editing optimization,with emphasis placed on editing efficiency and specificity ***,we demonstrate how machine learning bridges genome editing and crop breeding,by accurate key site detection and guide RNA ***,we discuss the current challenges and prospects of these two techniques in crop *** integrating advanced genome editing techniques with machine learning,progress in crop breeding will be further accelerated in the future.

关键词： Machine learning Genome editing Crop improvement Molecular design breeding

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An Efficient Task Scheduling Algorithm in the Cloud and Edge Collaborative Environment

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Chinese Journal of Electronics 2024年第5期33卷 1296-1307页

作者： Saiqin long Cong WANG Weifan long Haolin LIU Qingyong DENG Zhetao LI Jinan University School of Computer Science Xiangtan University Guangxi Normal University

With the advent of the 5G era and the accelerated development of edge computing and Internet of Things technologies, the number of tasks to be processed by mobile devices continues to increase. Edge nodes become incapable of facing massive tasks due to their own limited computing capabilities, and thus the cloud and edge collaborative environment is produced. In order to complete as many tasks as possible while meeting the deadline constraints, we consider the task scheduling problem in the cloud-edge and edge-edge collaboration scenarios. As the number of tasks on edge nodes increases, the solution space becomes larger. Considering that each edge node has its own communication range, we design an edge node based clustering algorithm(ENCA), which can reduce the feasible region while dividing the edge node set. We transform the edge nodes inside the cluster into a bipartite graph,and then propose a task scheduling algorithm based on maximum matching(SAMM). Our ENCA and SAMM are used to solve the task scheduling problem. Compared with the other benchmark algorithms, experimental results show that our algorithms increase the number of the tasks which can be completed and meet the latest deadline constraints by 32%–47.2% under high load conditions.

关键词： Bipartite matching Node clustering Edge-edge collaboration Cloud-edge collaboration Task scheduling Bipartite matching Node clustering Edge-edge collaboration Cloud-edge collaboration Task scheduling COMPUTATION ASSIGNMENT

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Classifying hepatitis B therapies with insights from covalently closed circular DNA dynamics

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Virologica Sinica 2024年第1期39卷 9-23页

作者： Jie-Li Hu Ai-long Huang Key Laboratory of Molecular Biology on Infectious Diseases Ministry of EducationChongqing Medical UniversityChongqing400016China

The achievement of a functional cure for chronic hepatitis B(CHB)remains limited to a minority of patients treated with currently approved *** primary objective in developing new anti-HBV drugs is to enhance the functional cure rates for CHB.A critical prerequisite for the functional cure of CHB is a substantial reduction,or even eradication of covalently closed circular DNA(cccDNA).Within this context,the changes in cccDNA levels during treatment become as a pivotal *** have previously analyzed the factors influencing cccDNA dynamics and introduced a preliminary classification of hepatitis B treatment strategies based on these *** this review,we employ a systems thinking perspective to elucidate the fundamental aspects of the HBV replication cycle and to rationalize the classification of treatment strategies according to their impact on the dynamic equilibrium of *** upon this foundation,we categorize current anti-HBV strategies into two distinct groups and advocate for their combined use to significantly reduce cccDNA levels within a well-defined timeframe.

关键词： Hepatitis B cccDNA Functional cure Dynamics Treatment Strategy

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