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Noise transmission and delay-induced stochastic oscillations in biochemical network motifs 被引量:1
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作者 刘圣君 王祺 +2 位作者 刘波 晏世伟 Fumihiko Sakatac 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第12期469-483,共15页
With the aid of stochastic delayed-feedback differential equations, we derive an analytic expression for the power spectra of reacting molecules included in a generic biological network motif that is incorporated with... With the aid of stochastic delayed-feedback differential equations, we derive an analytic expression for the power spectra of reacting molecules included in a generic biological network motif that is incorporated with a feedback mechanism and time delays in gene regulation. We systematically analyse the effects of time delays, the feedback mechanism, and biological stochasticity on the power spectra. It has been clarified that the time delays together with the feedback mechanism can induce stochastic oscillations at the molecular level and invalidate the noise addition rule for a modular description of the noise propagator. Delay-induced stochastic resonance can be expected, which is related to the stability loss of the reaction systems and Hopf bifurcation occurring for solutions of the corresponding deterministic reaction equations. Through the analysis of the power spectrum, a new approach is proposed to estimate the oscillation period. 展开更多
关键词 biological stochasticity time delay oscillation and resonance network motif
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Dynamics of network motifs in genetic regulatory networks
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作者 李莹 刘曾荣 张建宝 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第9期2587-2594,共8页
Network motifs hold a very important status in genetic regulatory networks. This paper aims to analyse the dynamical property of the network motifs in genetic regulatory networks. The main result we obtained is that t... Network motifs hold a very important status in genetic regulatory networks. This paper aims to analyse the dynamical property of the network motifs in genetic regulatory networks. The main result we obtained is that the dynamical property of a single motif is very simple with only an asymptotically stable equilibrium point, but the combination of several motifs can make more complicated dynamical properties emerge such as limit cycles. The above-mentioned result shows that network motif is a stable substructure in genetic regulatory networks while their combinations make the genetic regulatory network more complicated. 展开更多
关键词 genetic regulatory network motif feedback loop
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Local Community Detection Based on Network Motifs 被引量:4
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作者 Yunlei Zhang Bin Wu +1 位作者 Yu Liu Jinna Lv 《Tsinghua Science and Technology》 SCIE EI CAS CSCD 2019年第6期716-727,共12页
Local community detection aims to find a cluster of nodes by exploring a small region of the network.Local community detection methods are faster than traditional global community detection methods because their runti... Local community detection aims to find a cluster of nodes by exploring a small region of the network.Local community detection methods are faster than traditional global community detection methods because their runtime does not depend on the size of the entire network.However,most existing methods do not take the higher-order connectivity patterns crucial to the network into consideration.In this paper,we develop a new Local Community Detection method based on network Motif(LCD-Motif)which incorporates the higher-order network information.LCD-Motif adopts the local expansion of a seed set to identify the local community with minimal motif conductance,representing a generalization of the conductance metric for network motifs.In contrast to PageRanklike diffusion methods,LCD-Motif finds the community by seeking a sparse vector in the span of the local spectra,such that the seeds are in its support vector.We evaluate our approach using real-world datasets across various domains and synthetic networks.The experimental results show that LCD-Motif can achieve a higher performance than state-of-the-art methods. 展开更多
关键词 community detection network motifs local spectral clustering seed set expansion random walk
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Network Motif Detection: Algorithms, Parallel and Cloud Computing,and Related Tools 被引量:2
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作者 Wooyoung Kim Martin Diko Keith Rawson 《Tsinghua Science and Technology》 SCIE EI CAS 2013年第5期469-489,共21页
Network motif is defined as a frequent and unique subgraph pattern in a network, and the search involves counting all the possible instances or listing all patterns, testing isomorphism known as NP-hard and large amou... Network motif is defined as a frequent and unique subgraph pattern in a network, and the search involves counting all the possible instances or listing all patterns, testing isomorphism known as NP-hard and large amounts of repeated processes for statistical evaluation. Although many efficient algorithms have been introduced, exhaustive search methods are still infeasible and feasible approximation methods are yet implausible.Additionally, the fast and continual growth of biological networks makes the problem more challenging. As a consequence, parallel algorithms have been developed and distributed computing has been tested in the cloud computing environment as well. In this paper, we survey current algorithms for network motif detection and existing software tools. Then, we show that some methods have been utilized for parallel network motif search algorithms with static or dynamic load balancing techniques. With the advent of cloud computing services, network motif search has been implemented with MapReduce in Hadoop Distributed File System(HDFS), and with Storm, but without statistical testing. In this paper, we survey network motif search algorithms in general, including existing parallel methods as well as cloud computing based search, and show the promising potentials for the cloud computing based motif search methods. 展开更多
关键词 network motif parallel search MapReduce HDFS storm
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基于路网motif图注意力网络的轨迹预测方法
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作者 王桂玲 黄傲 +1 位作者 郑鑫 钱宏瑛 《北方工业大学学报》 2025年第3期1-13,共13页
随着智能交通系统(Intelligent Transportation Systems, ITS)的发展,城市交通车辆轨迹预测技术在交通管理和智能导航中具有重要的应用价值。在城市交通中,车辆出行轨迹受路网约束,将路网引入轨迹预测模型中有助于提高预测精度,但目前... 随着智能交通系统(Intelligent Transportation Systems, ITS)的发展,城市交通车辆轨迹预测技术在交通管理和智能导航中具有重要的应用价值。在城市交通中,车辆出行轨迹受路网约束,将路网引入轨迹预测模型中有助于提高预测精度,但目前已有的基于路网的轨迹预测模型尚未充分利用路网中的高阶结构。因此,本文提出了一种基于路网motif图注意力网络的轨迹预测模型(Graph Attention Network for Trajectory Prediction based on Road Network Motifs, GRAM),该模型依靠真实路网中的motif来挖掘路网的高阶结构属性。GRAM基于路网motif构建交通流图,并利用图注意力网络从基于motif的交通流图和局部个体轨迹图中学习特征,同时通过结合不同motif对同一位置的影响训练模型,以获得最优比例。在3个真实轨迹数据集(波尔图、成都、北京)上的实验结果表明,本文的GRAM展示出了更好的性能。 展开更多
关键词 车辆轨迹预测 motif 图注意力网络
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Oscillatory and anti-oscillatory motifs in genetic regulatory networks 被引量:1
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作者 叶纬明 张朝阳 +2 位作者 吕彬彬 狄增如 胡岗 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第6期10-18,共9页
Recently, self-sustained oscillatory genetic regulatory networks (GRNs) have attracted significant attention in the biological field. Given a GRN, it is important to anticipate whether the network could generate osc... Recently, self-sustained oscillatory genetic regulatory networks (GRNs) have attracted significant attention in the biological field. Given a GRN, it is important to anticipate whether the network could generate oscillation with proper parameters, and what the key ingredients for the oscillation are. In this paper the ranges of some function-related parameters which are favorable to sustained oscillations are considered. In particular, some oscillatory motifs appearing with high-frequency in most of the oscillatory GRNs are observed. Moreover, there are some anti-oscillatory motifs which have a strong oscillation repressing effect. Some conclusions analyzing these motif effects and constructing oscillatory GRNs are provided. 展开更多
关键词 genetic regulatory network oscillatory motif anti-oscillatory motif feedback loop
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Motif-based Classification in Journal Citation Networks 被引量:1
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作者 Wenchen Wu Yanni Han Deyi Li 《Journal of Software Engineering and Applications》 2008年第1期53-59,共7页
Journals and their citation relations are abstracted into journal citation networks, basing on CSTPC journal database from year 2003 to 2006. The network shows some typical characteristics from complex networks. This ... Journals and their citation relations are abstracted into journal citation networks, basing on CSTPC journal database from year 2003 to 2006. The network shows some typical characteristics from complex networks. This paper presents the idea of using motifs, subgraphs with higher occurrence in real network than in random ones, to discover two different citation patterns in journal communities. And a further investigation is addressed on both motif granularity and node centrality to figure out some reasons on the differences between two kinds of communities in journal citation network. 展开更多
关键词 motif CLASSIFICATION JOURNAL CITATION networkS
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Social networks improve leaderless group navigation by facilitating long-distance communication 被引量:1
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作者 Nikolai W. F. BODE A. Jamie WOOD Daniel W. FRANKS 《Current Zoology》 SCIE CAS CSCD 2012年第2期329-341,共13页
Group navigation is of great importance for many animals, such as migrating flocks of birds or shoals of fish. One theory states that group membership can improve navigational accuracy compared to limited or less accu... Group navigation is of great importance for many animals, such as migrating flocks of birds or shoals of fish. One theory states that group membership can improve navigational accuracy compared to limited or less accurate individual naviga- tional ability in groups without leaders ("Many-wrongs principle"). Here, we simulate leaderless group navigation that includes social connections as preferential interactions between individuals. Our results suggest that underlying social networks can reduce navigational errors of groups and increase group cohesion. We use network summary statistics, in particular network motifs, to study which characteristics of networks lead to these improvements. It is networks in which preferences between individuals are not clustered, but spread evenly across the group that are advantageous in group navigation by effectively enhancing long-distance information exchange within groups. We suggest that our work predicts a base-line for the type of social structure we might expect to find in group-living animals that navigate without leaders 展开更多
关键词 Collective motion Social networks Group navigation network motifs Many-wrongs principle Individual-based model
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A Topological Evolution Model Based on the Attraction of the Motif Vertex 被引量:1
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作者 Xing Li Shuxin Liu +1 位作者 Yuhang Zhu Yingle Li 《China Communications》 SCIE CSCD 2021年第4期27-39,共13页
As a fundamental problem in the field of the network science,the study of topological evolution model is of great significance for revealing the inherent dynamics and mechanisms of complex network evolution.In order t... As a fundamental problem in the field of the network science,the study of topological evolution model is of great significance for revealing the inherent dynamics and mechanisms of complex network evolution.In order to study the influence of different scales of preferential attachment on topological evolution,a topological evolution model based on the attraction of the motif vertex is proposed.From the perspective of network motif,this model proposes the concept of attraction of the motif vertex based on the degree of the motif,quantifies the influence of local structure on the node preferential attachment,and performs the preferential selection of the new link based on the Local World model.The simulation experiments show that the model has the small world characteristic apparently,and the clustering coefficient varies with the scale of the local world.The degree distribution of the model changes from power-law distribution to exponential distribution with the change of parameters.In some cases,the piecewise power-law distribution is presented.In addition,the proposed model can present a network with different matching patterns as the parameters change. 展开更多
关键词 complex network topological evolution model network motif
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Influence of coupling asymmetry on signal amplification in a three-node motif
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作者 梁晓明 方超 +1 位作者 张希昀 吕华平 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第1期239-243,共5页
The three-node feedforward motif has been revealed to function as a weak signal amplifier. In this motif, two nodes(input nodes) receive a weak input signal and send it unidirectionally to the third node(output node).... The three-node feedforward motif has been revealed to function as a weak signal amplifier. In this motif, two nodes(input nodes) receive a weak input signal and send it unidirectionally to the third node(output node). Here, we change the motif's unidirectional couplings(feedforward) to bidirectional couplings(feedforward and feedback working together).We find that a small asymmetric coupling, in which the feedforward effect is stronger than the feedback effect, may enable the three-node motif to go through two distinct dynamic transitions, giving rise to a double resonant signal response. We present an analytical description of the double resonance, which agrees with the numerical findings. 展开更多
关键词 network motif SYNCHRONIZATION coupling asymmetry signal amplification
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Influence of network structure on spreading dynamics via tie range
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作者 李敏 宋玉蓉 +3 位作者 宋波 李汝琦 蒋国平 张晖 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第8期606-613,共8页
There are various phenomena of malicious information spreading in the real society, which cause many negative impacts on the society. In order to better control the spreading, it is crucial to reveal the influence of ... There are various phenomena of malicious information spreading in the real society, which cause many negative impacts on the society. In order to better control the spreading, it is crucial to reveal the influence of network structure on network spreading. Motifs, as fundamental structures within a network, play a significant role in spreading. Therefore, it is of interest to investigate the influence of the structural characteristics of basic network motifs on spreading dynamics.Considering the edges of the basic network motifs in an undirected network correspond to different tie ranges, two edge removal strategies are proposed, short ties priority removal strategy and long ties priority removal strategy. The tie range represents the second shortest path length between two connected nodes. The study focuses on analyzing how the proposed strategies impact network spreading and network structure, as well as examining the influence of network structure on network spreading. Our findings indicate that the long ties priority removal strategy is most effective in controlling network spreading, especially in terms of spread range and spread velocity. In terms of network structure, the clustering coefficient and the diameter of network also have an effect on the network spreading, and the triangular structure as an important motif structure effectively inhibits the spreading. 展开更多
关键词 network spreading network motifs tie range edge removal strategy
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Multiscale Characteristics and Connection Mechanisms of Attraction Networks:A Trajectory Data Mining Approach Leveraging Geotagged Data
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作者 JIANG Hongqiang WEI Ye +1 位作者 MEI Lin WANG Zhaobo 《Chinese Geographical Science》 SCIE CSCD 2024年第3期533-547,共15页
Urban tourism is considered a complex system,and multiscale exploration of the organizational patterns of attraction networks has become a topical issue in urban tourism,so exploring the multiscale characteristics and... Urban tourism is considered a complex system,and multiscale exploration of the organizational patterns of attraction networks has become a topical issue in urban tourism,so exploring the multiscale characteristics and connection mechanisms of attraction networks is important for understanding the linkages between attractions and even the future destination planning.This paper uses geotagging data to compare the links between attractions in Beijing,China during four different periods:the pre-Olympic period(2004–2007),the Olympic Games and subsequent‘heat period’(2008–2013),the post-Olympic period(2014–2019),and the COVID-19(Corona Virus Disease 2019)pandemic period(2020–2021).The aim is to better understand the evolution and patterns of attraction networks at different scales in Beijing and to provide insights for tourism planning in the destination.The results show that the macro,meso-,and microscales network characteristics of attraction networks have inherent logical relationships that can explain the commonalities and differences in the development process of tourism networks.The macroscale attraction network degree Matthew effect is significant in the four different periods and exhibits a morphological monocentric structure,suggesting that new entrants are more likely to be associated with attractions that already have high value.The mesoscale links attractions according to the common purpose of tourists,and the results of the community segmentation of the attraction networks in the four different periods suggest that the functional polycentric structure describes their clustering effect,and the weak links between clusters result from attractions bound by incomplete information and distance,and the functional polycentric structure with a generally more efficient network of clusters.The pattern structure at the microscale reveals the topological transformation relationship of the regional collaboration pattern,and the attraction network structure in the four different periods has a very similar importance profile structure suggesting that the attraction network has the same construction rules and evolution mechanism,which aids in understanding the attraction network pattern at both macro and micro scales.Important approaches and practical implications for planners and managers are presented. 展开更多
关键词 attraction network travel mobility polycentric structure network motif connectivity mechanism destination management organization(DMO) destination planning Beijing China
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生物复杂网络motif发现的并行算法 被引量:2
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作者 杨伏长 朱嘉富 +1 位作者 孙佳敏 谢江 《计算机应用》 CSCD 北大核心 2019年第1期72-77,共6页
生物复杂网络motif发现是一种研究生物网络的重要方法,它基于复杂网络的理论研究,以新的视角来研究生命现象和生命机制,但是在处理较大的网络规模或者需挖掘较大的motif时计算效率低。针对这个问题,在现有串行网络motif发现算法ESU的基... 生物复杂网络motif发现是一种研究生物网络的重要方法,它基于复杂网络的理论研究,以新的视角来研究生命现象和生命机制,但是在处理较大的网络规模或者需挖掘较大的motif时计算效率低。针对这个问题,在现有串行网络motif发现算法ESU的基础上,提出一种基于消息传递接口(MPI)的并行化ESU算法。该方法在ESU计算过程中优化了节点值以解决节点值依赖问题,并以ESU算法的子图发现策略统计各节点子图数,利用动态规划策略寻找最佳节点分配策略以解决负载不均衡问题。模拟网络数据和真实生物网络数据的实验结果表明,并行化ESU算法优化了节点值依赖问题,实现了基于动态规划的负载均衡策略,其运行时间比串行算法缩短了90%,并且该并行算法对不同类型不同规模的网络都具有较强的适用性,有效地提高了网络motif发现问题的计算效率。 展开更多
关键词 网络motif发现 子图枚举 同构比较 并行化 消息传递接口
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Application of convolutional neural networks to large-scale naphtha pyrolysis kinetic modeling 被引量:8
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作者 Feng Hua Zhou Fang Tong Qiu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第12期2562-2572,共11页
System design and optimization problems require large-scale chemical kinetic models. Pure kinetic models of naphtha pyrolysis need to solve a complete set of stiff ODEs and is therefore too computational expensive. On... System design and optimization problems require large-scale chemical kinetic models. Pure kinetic models of naphtha pyrolysis need to solve a complete set of stiff ODEs and is therefore too computational expensive. On the other hand, artificial neural networks that completely neglect the topology of the reaction networks often have poor generalization. In this paper, a framework is proposed for learning local representations from largescale chemical reaction networks. At first, the features of naphtha pyrolysis reactions are extracted by applying complex network characterization methods. The selected features are then used as inputs in convolutional architectures. Different CNN models are established and compared to optimize the neural network structure.After the pre-training and fine-tuning step, the ultimate CNN model reduces the computational cost of the previous kinetic model by over 300 times and predicts the yields of main products with the average error of less than 3%. The obtained results demonstrate the high efficiency of the proposed framework. 展开更多
关键词 Convolutional NEURAL network network motif NAPHTHA PYROLYSIS KINETIC modeling
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用网络方法识别生物序列motif
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作者 许诗蓉 汪四水 《生物信息学》 2008年第4期183-186,共4页
生物序列motif的识别是后基因组时代的一个核心问题。本文首先回顾了识别motif的几种主要算法,然后根据motif的重要性和随机性介绍了利用网络识别motif的两种具有代表性的方法:一种是建立一个随机网络混合模型,利用EM算法识别其中随机... 生物序列motif的识别是后基因组时代的一个核心问题。本文首先回顾了识别motif的几种主要算法,然后根据motif的重要性和随机性介绍了利用网络识别motif的两种具有代表性的方法:一种是建立一个随机网络混合模型,利用EM算法识别其中随机的网络motif;另一种用修正的参数流算法过滤出其中的最大密度子图,即为生物序列motif,并指出这两种方法的优劣,最后还对今后研究方向给出了讨论。 展开更多
关键词 生物序列motif 随机网络 motifCut
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保持Motif结构的网络表示学习 被引量:1
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作者 许磊 黄玲 王昌栋 《计算机科学与探索》 CSCD 北大核心 2019年第8期1261-1271,共11页
随着信息技术的广泛应用,网络在人们日常的生活中变得无处不在。网络表示学习算法是最近研究网络的一个热门领域,它旨在保留网络拓扑结构信息的同时,将网络映射到一个潜在、低维度的向量空间。网络Motif,在网络分析中具有重要的意义,然... 随着信息技术的广泛应用,网络在人们日常的生活中变得无处不在。网络表示学习算法是最近研究网络的一个热门领域,它旨在保留网络拓扑结构信息的同时,将网络映射到一个潜在、低维度的向量空间。网络Motif,在网络分析中具有重要的意义,然而之前提出的网络表示学习算法绝大多数只考虑了节点的邻域属性或邻近性,而忽略了节点的Motif结构信息。因此,基于上述考虑,提出了算法"保持Motif结构的网络表示学习",使得在学习网络节点向量表示时能够更加侧重地考虑网络Motif的结构。算法首先计算出基于Motif的网络权重矩阵;接着求得网络中每个节点的基于Motif的个性化PageRank预估值;最后进行MotifWalk得到游走路径,从而能够运用Word2Vec模型来得到网络的向量表示。通过与三个经典的网络表示算法比较,发现在稠密以及Motif结构丰富的网络中,提出的算法表现得更好。 展开更多
关键词 网络表示学习 随机游走 motif结构
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基于Motif的图采样算法
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作者 石俊豪 王欣 +2 位作者 邹杰军 方宇 蒋星 《南京大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第4期552-565,共14页
图采样通过对图数据进行约简操作,获得比原图的规模更小的图结构,进而服务于图谱分析、图可视化等下游任务.现有的图采样算法侧重于保留图中显著的结构特征而忽略了节点属性,导致采样图在许多下游任务如频繁模式挖掘等,难以取得预期效果... 图采样通过对图数据进行约简操作,获得比原图的规模更小的图结构,进而服务于图谱分析、图可视化等下游任务.现有的图采样算法侧重于保留图中显著的结构特征而忽略了节点属性,导致采样图在许多下游任务如频繁模式挖掘等,难以取得预期效果.为此,提出基于Motif的节点有偏采样算法(Motif-Based Node Biased Sampling,MNBS),利用频繁Motif结构重新定义图中节点的重要性,随后进行有偏节点采样,实现融合节点属性与结构特征的采样.为了快速识别频繁Motif模式,设计了具有“提前终止”特性的Motif模式快速发现算法(Fast Motif-Pattern Discovery,FMPD),能高效且准确地发现Motif模式以支持图采样.实验表明,MNBS采样算法在多项指标上优于其他基线算法,其对数归一化累积组相关性指标平均降低0.54,使用包含“提前终止”特性策略的FMPD算法的时间消耗和内存消耗比基线算法分别降低56.1%和29.8%. 展开更多
关键词 图采样 图数据挖掘 网络分析 motif结构
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一种面向动态异构信息网络的高效极大motif团挖掘方法
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作者 丁晨 周军锋 杜明 《新一代信息技术》 2021年第15期1-8,15,共9页
异构信息网络是一种把顶点与类型标签相关联的数据图,用于刻画不同类型对象间的复杂限制语义,如地理社交网络和生物网络等。给定不同类型顶点间的限制关系,极大motif团是符合这种限制关系的“完全子图”。通过发现极大motif团可以在异... 异构信息网络是一种把顶点与类型标签相关联的数据图,用于刻画不同类型对象间的复杂限制语义,如地理社交网络和生物网络等。给定不同类型顶点间的限制关系,极大motif团是符合这种限制关系的“完全子图”。通过发现极大motif团可以在异构信息网络上找到满足特定限制关系且关联紧密的群体。考虑到实际应用中异构信息网络频繁更新,且现有的极大motif团挖掘算法不支持动态图上极大motif团的高效挖掘问题,本文通过设计新的加边、减边策略,提出了一种支持极大motif团更新的算法UMMD。基于多个真实数据集的实验结果表明,UMMD算法具有高效性。 展开更多
关键词 动态异构信息网络 极大motif 极大motif团挖掘
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廊道旅游地空间网络结构及其形成机制 被引量:4
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作者 王心蕊 黄丹丹 李毓 《经济地理》 北大核心 2025年第1期236-245,共10页
作为一种线型空间,廊道旅游地资源类型丰富,且在空间分布上呈现出独特性。文章以岭南民族特色高质量发展廊道为例,综合运用模体分析和指数随机图模型,识别了廊道旅游地的空间网络结构及其形成机制。研究发现:①廊道旅游地的空间网络呈... 作为一种线型空间,廊道旅游地资源类型丰富,且在空间分布上呈现出独特性。文章以岭南民族特色高质量发展廊道为例,综合运用模体分析和指数随机图模型,识别了廊道旅游地的空间网络结构及其形成机制。研究发现:①廊道旅游地的空间网络呈现出分散式“核心—边缘”结构,核心节点之间更容易建立联系,以带动边缘节点、实现整体发展;②廊道旅游地空间网络内部存在差异性的子结构,且各子结构之间联系越紧密,越能够发挥“串点成线”的联动作用;③廊道旅游地空间网络存在互惠发展、间接联通和三角传递的演化模式,网络基础单元的自组织机制是廊道空间网络的内部涌现机制;④廊道旅游地空间网络的形成是“内生网络结构—行动者属性—外部空间特征”共同影响的结果。 展开更多
关键词 廊道旅游地 空间网络结构 模体分析 民族文化 资源等级 乡村振兴 岭南文旅廊道
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Central role of Yes-associated protein and WW-domain-containing transcriptional co-activator with PDZ-binding motif in pancreatic cancer development 被引量:3
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作者 Enrique Rozengurt Guido Eibl 《World Journal of Gastroenterology》 SCIE CAS 2019年第15期1797-1816,共20页
Pancreatic ductal adenocarcinoma(PDAC) remains a deadly disease with no efficacious treatment options. PDAC incidence is projected to increase, which may be caused at least partially by the obesity epidemic. Significa... Pancreatic ductal adenocarcinoma(PDAC) remains a deadly disease with no efficacious treatment options. PDAC incidence is projected to increase, which may be caused at least partially by the obesity epidemic. Significantly enhanced efforts to prevent or intercept this cancer are clearly warranted. Oncogenic KRAS mutations are recognized initiating events in PDAC development, however, they are not entirely sufficient for the development of fully invasive PDAC.Additional genetic alterations and/or environmental, nutritional, and metabolic signals, as present in obesity, type-2 diabetes mellitus, and inflammation, are required for full PDAC formation. We hypothesize that oncogenic KRAS increases the intensity and duration of the growth-promoting signaling network.Recent exciting studies from different laboratories indicate that the activity of the transcriptional co-activators Yes-associated protein(YAP) and WW-domaincontaining transcriptional co-activator with PDZ-binding motif(TAZ) play a critical role in the promotion and maintenance of PDAC operating as key downstream target of KRAS signaling. While initially thought to be primarily an effector of the tumor-suppressive Hippo pathway, more recent studies revealed that YAP/TAZ subcellular localization and co-transcriptional activity is regulated by multiple upstream signals. Overall, YAP has emerged as a central node of transcriptional convergence in growth-promoting signaling in PDAC cells. Indeed, YAP expression is an independent unfavorable prognostic marker for overall survival of PDAC. In what follows, we will review studies implicating YAP/TAZ in pancreatic cancer development and consider different approaches to target these transcriptional regulators. 展开更多
关键词 Pancreatic cancer Yes-associated protein and WW-domain-containing TRANSCRIPTIONAL CO-ACTIVATOR with PDZ-binding motif Oncogenic Kras Obesity Signaling network and LOOPS
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