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Chinese Journal of Structural Chemistry 2024年第6期43卷 4-5页

作者： Zheng Zhao Ben Zhong tang School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen(CUHK-Shenzhen)Guangdong518172China

Organic light-emitting diodes(OLEDs)based on highly efficient aggregate emitters present a significant breakthrough in realizing low-cost displays and solid-state lighting,thus drawing considerable research interest i... 详细信息

关键词： emitter breakthrough dipole

Nanoscale Reorganization of Glutamate Receptors Underlies Synaptic Plasticity and Pathology

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Neuroscience Bulletin 2024年第6期40卷 840-844页

作者： Jia-Hui Chen Ai-Hui tang Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Brain Function and DiseaseNeurodegenerative Disorder Research Center and Biomedical Sciences and Health Laboratory of Anhui ProvinceUniversity of Science and Technology of ChinaHefei230027China Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefei230088China

Excitatory synapses serve as the primary sites for information transmission between neurons in the *** work over the past decades has identified and revealed multiple compositions and functions of the synaptic proteome in the postsynaptic density(PSD),including receptors,scaffold proteins,and signaling molecules,which work together to ensure stable and effective synaptic transmission.

关键词： Receptor scale Glutamate

Effect of bariatric surgery on metabolism in diabetes and obesity comorbidity:Insight from recent research

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World Journal of Diabetes 2024年第4期15卷 586-590页

作者： Hui-Hong tang Dong Wang Cheng-Chun tang Department of Cardiology Zhongda HospitalSoutheast UniversityNanjing 210009Jiangsu ProvinceChina School of Medicine Southeast UniversityNanjing 210009Jiangsu ProvinceChina

Obesity is a prevalent cause of diabetes mellitus(DM)and is a serious danger to human *** 2 DM(T2DM)mostly occurs along with *** obesity-induced DM is caused by an excessive long-term diet and surplus *** surgery can improve the symptoms of T2DM in some obese *** different types of bariatric surgery may have different *** are some models built by researchers to discuss the surgical procedures’effects on me-tabolism in diabetes animal models and diabetes *** is high time to conclude all this effects and recommend procedures that can better improve metabolism.

关键词： Bariatric surgery Obesity Diabetes Animal models Diabetes patients

Epigenetic regulators as the foundation for molecular classification of colorectal cancer

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Cancer Biology & Medicine 2024年第7期21卷 547-552页

作者： Zhenyu Liu Xin Zhou Fuchou tang School of Life Sciences Biomedical Pioneering Innovation CenterDepartment of General SurgeryThird HospitalPeking UniversityBejing 100871China Bejing Advanced Innovation Center for Genomics(ICG) Ministry of Education Key Laboratory of Cell Proliferation and DifferentiationBeijing 100871China Peking University Third Hospital Cancer Center Bejing 100191China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China

Colorectal cancer (CRC) accounts for approximately 10% of newly diagnosed cancer cases and cancer-related deaths worldwide~1. The identification of molecular subtypes of CRCs has significantly advanced treatment strat... 详细信息

关键词： cancer colorectal cases

User Churn Prediction Hierarchical Model Based on Graph Attention Convolutional Neural Networks

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China Communications 2024年第7期21卷 169-185页

作者： Mei Miao tang Miao Zhou Long School of Economics and Management Beijing Jiaotong UniversityBeijing 100044China School of Automotive and Rail Transit Nanjing Institute of TechnologyNanjing 211167China Nanjing Intelligent Aviation Research Institute Co. LtdNanjing 210014China

The telecommunications industry is becoming increasingly aware of potential subscriber churn as a result of the growing popularity of smartphones in the mobile Internet era,the quick development of telecommunications services,the implementation of the number portability policy,and the intensifying competition among *** the same time,users'consumption preferences and choices are *** churn prediction models must be created in order to accurately predict the churn tendency,since keeping existing customers is far less expensive than acquiring new *** conventional or learning-based algorithms can only go so far into a single subscriber's data;they cannot take into consideration changes in a subscriber's subscription and ignore the coupling and correlation between various ***,the current churn prediction models have a high computational burden,a fuzzy weight distribution,and significant resource economic *** prediction algorithms involving network models currently in use primarily take into account the private information shared between users with text and pictures,ignoring the reference value supplied by other users with the same *** work suggests a user churn prediction model based on Graph Attention Convolutional Neural Network(GAT-CNN)to address the aforementioned *** main contributions of this paper are as follows:Firstly,we present a three-tiered hierarchical cloud-edge cooperative framework that increases the volume of user feature input by means of two aggregations at the device,edge,and cloud ***,we extend the use of users'own data by introducing self-attention and graph convolution models to track the relative changes of both users and packages ***,we build an integrated offline-online system for churn prediction based on the strengths of the two models,and we experimentally validate the efficacy of cloudside collaborative training and *** summary,the churn

关键词： cloud-edge cooperative framework GAT-CNN self-attention and graph convolution models subscriber churn prediction

校园网精细化管理下的IPv6接入认证技术研究

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计算机应用与软件 2015年第8期32卷 137-140页

作者：李涤平唐学文重庆大学计算机学院重庆400044 重庆大学信息与网络管理中心重庆400044

针对目前校园网用户获得的IPv6地址都是由系统随机发放或通过无状态的方式获得的,不便于统一管理,也不便于追溯用户的网络行为。为满足精细化管理的需求,实现用户名与IPv6地址的一一对应。提出对IPv6接入认证的改进方法。该改进主要针对... 详细信息

针对目前校园网用户获得的IPv6地址都是由系统随机发放或通过无状态的方式获得的,不便于统一管理,也不便于追溯用户的网络行为。为满足精细化管理的需求,实现用户名与IPv6地址的一一对应。提出对IPv6接入认证的改进方法。该改进主要针对PPPo E和IPo E,在认证分地址的过程中插入由用户名到IPv6地址转换的IPv6地址分配程序,并引入DES加密算法,设计与实现了IPv6地址分配程序和IPv6地址逆解析程序。实验结果表明,完全可以通过上述方法来达成用户的实名制,实现精细化管理。

关键词：精细化管理 IPv6地址分配 PPPoE IPo EDES

Influence of Film Thickness on Nanofabrication of Graphene Oxide

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Nanomanufacturing and Metrology 2024年第2期7卷 13-25页

作者： Chuan tang Lei Chen Linmao Qian Tribology Research Institute The State Key Laboratory of Rail Vehicle SystemSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu 610031China

Nanofabrication of two-dimensional materials through mechanical machining is normally influenced by not only process parameters such as load and velocity but also intrinsic properties such as strength and ***,we examined the effects of graphene oxide(GO)film thickness on nanofabrication on the plane surfaces and at the step edges using scanning probe microscope *** material removal of GO initiates at the load above a critical value,which strongly depends on film thickness and *** the increase in film thickness,the critical load decreases monotonically on the plane surfaces but increases gradually at the step ***,the critical load for the GO monolayer at the step edges is at least 25 times lower than that on the plane surfaces,and the gap decreases to around 3 times when GO thickness increases to four ***,mechanical nanofabrication initiating from the GO step edge allows producing various nanopatterns under extremely low loads around 1 ***,the GO nanostructures are deoxidized by annealing at 800°C in high-purity argon to restore their highly functionalized conjugated structures,which are supported by X-ray diffraction and Raman *** work provides a novel approach to fabricating graphene-like nanostructures by deoxidizing GO after nanofabrication,which holds significant potential for applications in graphene-based devices.

关键词： Graphene oxide Nanofabrication Film thickness step edge Nanopattern Deoxidized treatment

Spatial Variation in CO_(2) Concentration Improves the Simulated Surface Air Temperature Increase in the Northern Hemisphere

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Advances in Atmospheric Sciences 2024年第8期41卷 1614-1628,1676-1685页

作者： Jing PENG Li DAN Xiba tang CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Laboratory of Cloud-Precipitation Physics and Severe Storms(LACS) Institute of Atmospheric PhysicsBeijing 100029China

The increasing concentration of atmospheric CO_(2) since the Industrial Revolution has affected surface air ***,the impact of the spatial distribution of atmospheric CO_(2) concentration on surface air temperature biases remains highly *** incorporating the spatial distribution of satellite-derived atmospheric CO_(2) concentration in the Beijing Normal University Earth System Model,this study investigated the increase in surface air temperature since the Industrial Revolution in the Northern Hemisphere(NH) under historical conditions from *** comparison with the increase in surface temperature simulated using a uniform distribution of CO_(2),simulation with a nonuniform distribution of CO_(2)produced better agreement with the Climatic Research Unit(CRU) data in the NH under the historical condition relative to the baseline over the period *** June-July-August(JJA) surface air temperature increased by 1.28℃ ±0.29℃ in simulations with a uniform distribution of CO_(2),by 1.00℃±0.24℃ in simulations with a non-uniform distribution of CO_(2),and by 0.24℃ in the CRU *** decrease in downward shortwave radiation in the non-uniform CO_(2) simulation was primarily attributable to reduced warming in Eurasia,combined with feedbacks resulting from increased leaf area index(LAI) and latent heat *** effects were more pronounced in the non-uniform CO_(2)simulation compared to the uniform CO_(2) *** indicate that consideration of the spatial distribution of CO_(2)concentration can reduce the overestimated increase in surface air temperature simulated by Earth system models.

关键词： spatial variations of CO_(2) surface air temperature Earth system model land surface albedo leaf area index

Information-Theoretic Limits on Compression of Semantic Information

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China Communications 2024年第7期21卷 1-16页

作者： tang Jiancheng Yang Qianqian Zhang Zhaoyang College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310007China

As conventional communication systems based on classic information theory have closely approached Shannon capacity,semantic communication is emerging as a key enabling technology for the further improvement of communication ***,it is still unsettled on how to represent semantic information and characterise the theoretical limits of semantic-oriented compression and *** this paper,we consider a semantic source which is characterised by a set of correlated random variables whose joint probabilistic distribution can be described by a Bayesian *** give the information-theoretic limit on the lossless compression of the semantic source and introduce a low complexity encoding method by exploiting the conditional *** further characterise the limits on lossy compression of the semantic source and the upper and lower bounds of the rate-distortion *** also investigate the lossy compression of the semantic source with two-sided information at the encoder and decoder,and obtain the corresponding rate distortion *** prove that the optimal code of the semantic source is the combination of the optimal codes of each conditional independent set given the side information.

关键词： rate distortion semantic communication semantic compression

Positive definiteness of real quadratic forms resulting from the variable-step L1-type approximations of convolution operators

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Science China Mathematics 2024年第2期67卷 237-252页

作者： Hong-Lin Liao Tao tang Tao Zhou School of Mathematics Nanjing University of Aeronautics and AstronauticsNanjing 211106China Division of Science and Technology BNU-HKBU United International CollegeZhuhai 519087China SUSTech International Center for Mathematics Shenzhen 518055China NCMIS&LSEC Institute of Computational Mathematics and Scientific/Engineering ComputingAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China

The positive definiteness of real quadratic forms with convolution structures plays an important rolein stability analysis for time-stepping schemes for nonlocal operators. In this work, we present a novel analysistool to handle discrete convolution kernels resulting from variable-step approximations for convolution *** precisely, for a class of discrete convolution kernels relevant to variable-step L1-type time discretizations, weshow that the associated quadratic form is positive definite under some easy-to-check algebraic conditions. Ourproof is based on an elementary constructing strategy by using the properties of discrete orthogonal convolutionkernels and discrete complementary convolution kernels. To our knowledge, this is the first general result onsimple algebraic conditions for the positive definiteness of variable-step discrete convolution kernels. Using theunified theory, we obtain the stability for some simple nonuniform time-stepping schemes straightforwardly.

关键词： discrete convolution kernels positive definiteness variable time-stepping orthogonal convolution kernels complementary convolution kernels