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The Structure Entropy of Social Networks

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Journal of Systems Science & Complexity 2024年第3期37卷 1147-1162页

作者： LI Zhenpeng YAN Zhihua YANG Jian tang Xijin School of Electronics and Information Engineering Taizhou UniversityLinhai 317000China Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China Yunnan Key Laboratory of Smart City in Cyberspace Security Yuxi Normal UniversityYuci 653100China University of Chinese Academy of Sciences Beijing 100039China

Micro triadic structure is an important motif and serves the building block of complex *** this paper,the authors define structure entropy for a social network and explain this concept by using the coded triads proposed by Davis and Leinhardt in *** proposed structure entropy serves as a new macro-evolution index to measure the network’s stability at a given *** analysis of real-world network structure entropy discloses rich information on the mechanism that yields given triadic motifs frequency *** paper illustrates the intrinsic link between the micro dyadic/triadic motifs and network structure ***,the authors find that the high proportion of reciprocity and transitivity results in the emergence of hierarchy,order,and cooperation of online social networks.

关键词： Dyadic and triadic motifs network structure entropy reciprocity and transitivity

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高校图书馆校园阅读中的传统文化建设

兰台世界 2019年第1期 131-133页

作者：唐凤珠莫兵广西机电职业技术学院广西交通职业技术学院计算机信息工程系

随着社会科技的发展,中国传统文化建设面临着一些新的挑战与机遇。高校图书馆校园阅读应当分析和研究新时代大学生的阅读特点和阅读需求,创新阅读模式,将中国传统文化的传承与建设有机地融入高校图书馆校园阅读之中。

关键词：高校图书馆校园阅读传统文化

Experimental study on proppant-carrying migration and settlement of slickwater in narrow plate fractures based on PIV/PTV

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Petroleum 2024年第3期10卷 494-510页

作者： Tao Zhang tang tang Jianchun Guo Hangyu Zhou Yuxuan Liu Yifan Zhang Xianjin Zeng State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China Hainan Branch of CNOOC Limited HaikouHainan570300China

Hydraulic fracturing is the primary method used for oilfield stimulation,and the migration and settlement pattern of proppant plays a crucial role in the formation of high conductivity propping fractures in the *** study summarizes two growth modes of sand dune:the‘overall longitudinal growth’mode and the‘push growth along fracture length direction’*** investigate these modes,a twophase velocity test is conducted using PIV,and the exposure difference is utilized to separate the tracer and track the single-phase *** analyzing the slickwater flow field and proppant velocity field,the micro-motion mechanism behind the two dune growth modes is quantitatively *** results indicate that mode 1 growth of the sand dune occurs when a pump with a large mesh number,high polymer viscosity,and large displacement is *** the other hand,mode 2 growth is observed when a pump with a small mesh number,low polymer viscosity,and small displacement is *** is important to note that there is no clear boundary for the migration and sedimentation mode of proppant,as they can transition into each other under certain *** modes only exist during specific stages of sand dune *** the case of the‘backflow’pattern,the settlement of proppant is primarily influenced by the vortex structure of ***,in the‘direct’pattern,the proppant is propelled forward by the drag of the fluid and settles due to its own *** the proppant placement reaches equilibrium,the direction of proppant velocity follows a normal distribution within 0°.This approach establishes a connection between the overall placement of the sand dune and the microscopic movement of the proppant and *** construction parameters during fracturing construction can enhance the effectiveness of distal proppant placement in fractures.

关键词： Slickwater fracturing Proppant transport Multiphase flow PIV/PTV

Mechanism of Endogenous Peptide PDYBX1 and Precursor Protein YBX1 in Hirschsprung’s Disease

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Neuroscience Bulletin 2024年第6期40卷 695-706页

作者： Qiaochu Sun Zhengke Zhi Chenglong Wang Chunxia Du Jie tang Hongxing Li Weibing tang Department of Pediatric Surgery Children’s Hospital of Nanjing Medical UniversityNanjing210008China

Endogenous peptides,bioactive agents with a small molecular weight and outstanding absorbability,regulate various cellular processes and ***,their role in the occurrence of Hirschsprung’s disease(HSCR)remains ***,we found that the expression of an endogenous peptide derived from YBX1(termed PDYBX1 in this study)was upregulated in the aganglionic colonic tissue of HSCR patients,whereas its precursor protein YBX1 was *** shown by Transwell and cytoskeleton staining assays,silencing YBX1 inhibited the migration of enteric neural cells,and this effect was partially reversed after treatment with ***,immunoprecipitation and immunofluorescence revealed that ERK2 bound to YBX1 and *** of YBX1 blocked the ERK1/2 pathway,but upregulation of PDYBX1 counteracted this effect by binding to ERK2,thereby promoting cell migration and *** together,the endogenous peptide PDYBX1 may partially alleviate the inhibition of the ERK1/2 pathway caused by the downregulation of its precursor protein YBX1 to antagonize the impairment of enteric neural ***1 may be exploited to design a novel potential therapeutic agent for HSCR.

关键词： Hirschsprung’s disease YBX1 Endogenous peptide PDYBX1 Enteric neural cell

Numerical Study on the Impacts of Hydrometeor Processes on the“21·7”Extreme Rainfall in Zhengzhou Area of China

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Advances in Atmospheric Sciences 2024年第10期41卷 2061-2078页

作者： Wenhua GAO Chengyin LI Lanzhi tang State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China

The impacts of hydrometeor-related processes on the development and evolution of the“21·7”extremely heavy rainfall in Zhengzhou were investigated using WRF *** precipitation was determined by the hydrometeor microphysical processes(all microphysical source sink terms of hydrometeors)and macrophysical processes(local change and flux convergence of hydrometeors).The contribution of hydrometeor macrophysical processes was commonly less than 10%,but could reach 30%–50%in the early stage of precipitation,which was largely dependent on the size of the study *** macrophysical processes of liquid-phase hydrometeors always presented a promotional effect on rainfall,while the ice-phase hydrometeors played a negative role in the middle and later stages of *** distributions of microphysical latent heat corresponded well with those of buoyancy and vertical velocity(tendency),indicating that the phase-change heating was the major driver for convective *** diagnostic buoyancy was obtained by choosing an area close to the convective size for getting the reference state of *** addition,a new dynamic equilibrium involving hydrometeors with a tilted airflow was formed during the heavy precipitation period(updraft was not the strongest).The heaviest instantaneous precipitation was mainly produced by the warm-rain *** experiments further pointed out that the uncertainty of latent heat parameterization(±20%)did not significantly affect the convective *** when the phase-change heating only altered the temperature tendency,its impact on precipitation was *** results of this study help to deepen our understanding of heavy rainfall mechanisms from the perspective of hydrometeor processes.

关键词： heavy precipitation hydrometeor processes buoyancy latent heat

Retrieval of high spatial resolution mountainous land surface temperature considering topographic and adjacency effects

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Science China Earth Sciences 2024年第11期67卷 3610-3625页

作者： Zhiwei HE Bohui tang Zhaoliang LI Faculty of Land Resources Engineering Kunming University of Science and Technology Key Laboratory of Plateau Remote Sensing Department of Education of Yunnan Province State Key Lab of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences Key Laboratory of Agricultural Remote Sensing Ministry of Agriculture and Rural Affairs Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences

Land surface temperature(LST) is a key parameter reflecting the interaction between land and atmosphere. Currently,thermal infrared(TIR) quantitative remote sensing technology is the only means to obtain large-scale, high spatial resolution LST. Accurately retrieving high spatial resolution mountainous LST(MLST) plays an important role in the study of mountain climate change. The complex terrain and strong spatial heterogeneity in mountainous areas change the geometric relationship between the surface and satellite sensors, affecting the radiation received by the sensors, and rendering the assumption of planar parallelism invalid. In this study, considering the influence of complex terrain in mountainous areas on atmospheric downward radiation and the thermal radiation contribution of adjacent pixels, a mountainous TIR radiative transfer model based on the sky view factor was developed. Combining with the atmospheric radiative transfer model MODTRAN 5.2, a nonlinear generalized split-window algorithm suitable for high spatial resolution MLST retrieval was constructed and applied to Landsat-9 TIRS-2satellite TIR remote sensing data. The analysis results indicate that neglecting the topographic and adjacency effects would lead to significant discrepancies in LST retrieval, with simulated data showing LST differences of up to 2.5 K. Furthermore, due to the lack of measured MLST in the field, the MLST accuracy obtained by this retrieval method was indirectly validated using the currently recognized highest-accuracy forward 3D radiative transfer model DART. The MLST and emissivity were input into the DART model to simulate the brightness temperature at the top of the atmosphere(TOA) of Landsat-9 band 10, and compared with the brightness temperature at TOA of Landsat-9 band 10. The RMSE(Root Mean Square Error) for the two subregions was0.50 and 0.61 K, respectively, indicating that the method proposed can retrieve high-precision MLST.

关键词： Mountainous land surface temperature Topographic and adjacency effects Nonlinear generalized split-window algorithm Landsat-9 data DART model

Alleviating limit cycling in training GANs with an optimization technique

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Science China Mathematics 2024年第6期67卷 1287-1316页

作者： Keke Li Liping tang Xinmin Yang National Center for Applied Mathematics in Chongqing Chongqing Normal UniversityChongqing401331China School of Mathematical Sciences University of Electronic Science and Technology of ChinaChengdu611731China

In this paper,we undertake further investigation to alleviate the issue of limit cycling behavior in training generative adversarial networks(GANs)through the proposed predictive centripetal acceleration algorithm(PCAA).Specifically,we first derive the upper and lower complexity bounds of PCAA for a general bilinear game,with the last-iterate convergence rate notably improving upon previous ***,we combine PCAA with the adaptive moment estimation algorithm(Adam)to propose PCAA-Adam,for practical training of GANs to enhance their generalization ***,we validate the effectiveness of the proposed algorithm through experiments conducted on bilinear games,multivariate Gaussian distributions,and the CelebA dataset,respectively.

关键词： GANs general bilinear game predictive centripetal acceleration algorithm lower and upper complexity bounds PCAA-Adam

Microglial autophagy in neurogenesis:a new player in Alzheimer's disease

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Neural Regeneration Research 2024年第12期19卷 2573-2574页

作者： Xin tang Aarti Nagayach Chenran Wang Department of Cancer Biology University of Cincinnati College of MedicineCincinnatiOHUSA

While extensive studies have illuminated the impact of Alzheimer's disease(AD) on neuronal survival,there is growing evidence that abnormal postnatal neurogenesis in early AD brains contributes to disease *** neurogenesis serves as a mechanism to replace dead or damaged *** neurons generated from neural stem cells(NSCs) in the subgranular zone(SGZ) of the dentate gyrus integrate into the existing hippocampal circuit.

关键词： Alzheimer replace integrate

Upper and Lower Bounds of the α-Universal Triple I Method for Unified Interval Implications

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Computers, Materials & Continua 2024年第4期79卷 1063-1088页

作者： Yiming tang Jianwei Gao Yifan Huang School of Computer and Information Hefei University of TechnologyHefei230601China Department of Electrical and Computer Engineering University of AlbertaEdmontonAB T6R 2V4Canada

Theα-universal triple I(α-UTI)method is a recognized scheme in the field of fuzzy reasoning,whichwas proposed by our research group *** robustness of fuzzy reasoning determines the quality of reasoning algorithms to a large extent,which is quantified by calculating the disparity between the output of fuzzy reasoning with interference and the output without ***,in this study,the interval robustness(embodied as the interval stability)of theα-UTI method is explored in the interval-valued fuzzy *** begin with,the stability of theα-UTI method is explored for the case of an individual rule,and the upper and lower bounds of its results are estimated,using four kinds of unified interval implications(including the R-interval implication,the S-interval implication,the QL-interval implication and the interval t-norm implication).Through analysis,it is found that theα-UTI method exhibits good interval stability for an individual ***,the stability of theα-UTI method is revealed in the case of multiple rules,and the upper and lower bounds of its outcomes are *** results show that theα-UTI method is stable for multiple rules when four kinds of unified interval implications are used,***,theα-UTI reasoning chain method is presented,which contains a chain structure with multiple *** corresponding solutions and their interval perturbations are *** is found that theα-UTI reasoning chain method is stable in the case of chain *** application examples in affective computing are given to verify the stability of theα-*** summary,through theoretical proof and example verification,it is found that theα-UTImethod has good interval robustness with four kinds of unified interval implications aiming at the situations of an individual rule,multi-rule and reasoning chain.

关键词： Fuzzy reasoning the CRI method the triple I method fuzzy implication interval robustness