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A Novel Automatic Siamese Neural Network for Hyperspectral Image Classification 一种用于高光谱图像分类的自动暹罗神经网络
4区 数学 Q4 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2023-09-29 DOI: 10.1142/s179396232541003x
Yuan Qing
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引用次数: 0
A Generalization of Threshold-based and Probability-based Models of Information Diffusion 基于阈值和基于概率的信息扩散模型的推广
IF 0.4 4区 数学 Q4 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2023-07-28 DOI: 10.1142/s0219525923500054
Chathura Jayalath, Chathika Gunaratne, W. Rand, Chathurani Seneviratne, I. Garibay
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引用次数: 0
Uncertainty Visualization for Characterizing Heterogeneous Human Behaviors in Discrete Dynamical System Models 离散动力系统模型中描述异构人类行为的不确定性可视化
IF 0.4 4区 数学 Q4 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2023-07-14 DOI: 10.1142/s0219525923400015
Xueying Liu, Zhihao Hu, Xinwei Deng, C. Kuhlman
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引用次数: 0
Crime hotspot emergence in mexico city: a complexity science perspective 墨西哥城犯罪热点的出现:一个复杂科学的视角
IF 0.4 4区 数学 Q4 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2023-06-16 DOI: 10.1142/s0219525923500042
D. Hernández, Marco A. Jiménez, J. A. Bautista
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引用次数: 0
A Game of Life Shifted toward a Critical Point 一场人生游戏走向了一个临界点
IF 0.4 4区 数学 Q4 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2023-06-15 DOI: 10.25088/complexsystems.32.1.57
Tomoko Sakiyama
The Game of Life (GoL), which produces complex patterns of life, has been employed to describe biological systems through self-organized criticality and scale-free properties. This paper develops two novel GoL models. One model allows each cell to update the time for the state update following interactions with other local cells using parameter tuning. Thus, individual cells replace their behaviors from intermittent state updates with continuous ones. The system evolves unpredictably close to a critical point and occasionally close to extinction for the alive population if an adequate parameter is chosen. This event occurs with a power-law tailed time interval and presents synchronous behaviors, since individual cells modify their state-update intervals and create time continuity. The other model is the same except that the system evolves unpredictably without any parameter tuning. In the second model, actions of individual cells are tuned not by a fixed parameter but by the surrounding situation. We found that the GoL system in the second model behaved in a similar manner in the first model, which suggests that that model shifts toward a critical point autonomously.
生命游戏(GoL)产生了复杂的生命模式,已经被用来描述生物系统的自组织临界性和无标度特性。本文提出了两个新的GoL模型。一个模型允许每个单元在使用参数调优与其他本地单元交互后更新状态更新的时间。因此,单个细胞将它们的行为从间歇状态更新替换为连续状态更新。如果选择适当的参数,系统会不可预测地接近一个临界点,有时会接近存活种群的灭绝。此事件以幂律尾时间间隔发生,并呈现同步行为,因为单个单元修改其状态更新间隔并创建时间连续性。另一个模型是相同的,除了系统在没有任何参数调整的情况下不可预测地发展。在第二个模型中,单个细胞的行为不是由一个固定的参数来调节,而是由周围的情况来调节。我们发现第二个模型中的GoL系统与第一个模型中的行为方式相似,这表明该模型自主地向临界点转移。
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引用次数: 0
Use of Recurrence Plots to Find Mutations in Deoxyribonucleic Acid Sequences 使用递归图查找脱氧核糖核酸序列的突变
IF 0.4 4区 数学 Q4 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2023-06-15 DOI: 10.25088/complexsystems.32.1.89
D. E. Rivas-Cisneros
This paper examines the use of recurrence plots to find changes in the deoxyribonucleic acid (DNA) sequence. The DNA sequence is entered into the recurrence plot algorithm in codons and not consecutively, in order to make it easier to find the nucleotide change. The results show that the codon arrangement makes it easy to identify two types of mutations, insertion and deletion, by means of the recurrence plot. It is also shown that the recurrence plot of a short codon sequence has a homogeneous structure. Similarly, a comparison is made with the digital signal processing methodology. Some limitations are the number of codons that can be entered into the algorithm because computationally it becomes very slow and matrix issues, which are mentioned in the discussion section.
本文探讨了使用递归图来发现脱氧核糖核酸(DNA)序列的变化。DNA序列以密码子的形式输入递归图算法,而不是连续输入,以便更容易发现核苷酸的变化。结果表明,密码子的排列使得通过递归图很容易识别插入和缺失两种类型的突变。结果还表明,短密码子序列的递推图具有同质结构。同样,与数字信号处理方法进行了比较。一些限制是可以输入算法的密码子的数量,因为计算它变得非常慢,矩阵问题,这在讨论部分提到。
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引用次数: 0
Spatial Scale Effects in COVID-19 Spread Models COVID-19传播模型的空间尺度效应
IF 0.4 4区 数学 Q4 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2023-06-15 DOI: 10.25088/complexsystems.32.1.71
Marlon N. Gonzaga, Marcelo Martins de Oliveira, A. A. Faria
The COVID-19 pandemic has highlighted epidemiological models as important forecasting methods and planning strategies, with studies conducted using a wide variety of analytical and computational techniques. Knowing that more pandemic episodes may occur, it is essential that epidemiological modeling present increasingly credible results. From this perspective, this paper aims to highlight the influence of spatial distribution on an epidemic dynamic, using agent-based modeling. To calibrate the behavioral profile of the population, data was taken on mobility, population pyramid, individual behavior and government policies of a real population during the pandemic. Two different initial spatial distribution scenarios are tested and the robustness of the infection is analyzed. Totalistic rules were designed to assess the influence of infected individuals in the vicinity of an agent, a factor that must not be ignored in modeling respiratory diseases with viruses capable of spreading by aerosols, such as SARS-CoV-2. It is shown that the scenario with nonuniform distribution of agents is much more robust, generating an epidemic process even when uniform distribution, for the same parameters, did not propagate the infection. Our results also suggest that herd immunity is attained in different levels of recovered individuals, showing higher values in denser regions. In conclusion, it is reinforced that the nonuniform feature of the spatial distribution of individuals plays a key role in the infection dynamics and should receive more attention when building epidemiological models.
2019冠状病毒病大流行凸显了流行病学模型作为重要预测方法和规划策略的重要性,研究使用了各种分析和计算技术。鉴于可能会发生更多的大流行事件,流行病学模型必须提供越来越可信的结果。从这个角度来看,本文旨在利用基于智能体的建模来突出空间分布对流行病动态的影响。为了校准人口的行为特征,采集了大流行期间真实人口的流动性、人口金字塔、个人行为和政府政策等数据。测试了两种不同的初始空间分布情况,并分析了感染的鲁棒性。设计了总体规则来评估病原体附近受感染个体的影响,这是在模拟具有能够通过气溶胶传播的病毒(如SARS-CoV-2)的呼吸道疾病时不可忽视的一个因素。结果表明,药剂非均匀分布的情形具有更强的鲁棒性,即使对于相同的参数,均匀分布并不传播感染,也会产生流行病过程。我们的研究结果还表明,在不同水平的恢复个体中实现了群体免疫,在密度较大的地区显示出更高的值。综上所述,个体空间分布的不均匀特征在感染动态中起着关键作用,在建立流行病学模型时应予以更多关注。
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引用次数: 2
A lightweight DPT-MAC protocol to increase the network lifetime in wireless body area networks 一种轻量级DPT-MAC协议,用于增加无线体域网络中的网络寿命
4区 数学 Q4 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2023-05-13 DOI: 10.1142/s1793962324410113
A. Roshini, K. V. D. Kiran
Evolution of Wireless sensor networks (WSN) has found its identity in Wireless Body Area Networks (WBAN) to monitor the health status of adults undergone a surgery, etc. In addition, the mobility of the sensor nodes deployed on/in the human body plays a vital role in maintaining the accuracy of the physiological signal. In this paper, a Distributed Posture-based Traffic-Medium Access Control (DPT-MAC) protocol is proposed where the sensor nodes follow the Disc Communication model for the detection of neighbor nodes based on the proximity of the sensing range. Further, the modified IEEE 802.15.4 superframe structure determines the potential sleep posture of a subject to ensure a collision-free data transmission and prioritize the data traffic based on the criticality of the data like critical, periodic and nonregular data. The critical data detection occupies the channel on high priority and will have the probability to access the other channel space during the contention period of the noncritical data. The regular guaranteed time slot (GTS) is reduced from the tradition number of slots to five, which allows the nodes to handle the throughput. This uninterrupted data transmission minimizes the delay rate and collision ratio with any number of sensor nodes as the channel synchronization is strictly followed using the Carrier Sense Multiple Access/Collision Avoidance mechanism. Here, the optimization of the network quality parameters like energy consumption, throughput, delay and collision ratio assures a guaranteed increase in the Network Lifetime. The results show that the distributed topology outperforms the conventional star topology in sustaining the Network Lifetime.
无线传感器网络(WSN)的发展在无线体域网络(WBAN)中找到了自己的定位,用于监测成人手术等的健康状况。此外,部署在人体上/体内的传感器节点的移动性对维持生理信号的准确性起着至关重要的作用。本文提出了一种基于姿态的分布式流量介质访问控制(DPT-MAC)协议,该协议中传感器节点遵循圆盘通信模型,根据感知范围的接近程度来检测相邻节点。此外,改进的IEEE 802.15.4超帧结构确定受试者的潜在睡眠姿势,以确保无碰撞的数据传输,并根据关键数据、周期性数据和不规则数据等数据的临界性对数据流量进行优先排序。关键数据检测占据高优先级通道,在非关键数据争用期间有可能访问其他通道空间。将常规保证时隙(GTS)从传统的时隙数减少到5个,使节点能够处理吞吐量。这种不间断的数据传输最大限度地减少了与任意数量的传感器节点的延迟率和碰撞率,因为使用载波感知多址/避免碰撞机制严格遵循信道同步。在这里,优化网络质量参数,如能耗、吞吐量、延迟和碰撞率,确保了网络生命周期的保证增加。结果表明,分布式拓扑在维持网络生命周期方面优于传统的星型拓扑。
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引用次数: 0
Bi-Community Detection method based on both intra- and Inter-Correlation: an Applied Research of International Relations 基于内相关与互相关的双社区检测方法:国际关系中的应用研究
IF 0.4 4区 数学 Q4 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2023-04-21 DOI: 10.1142/s0219525923500029
C. Zhang, Boyu Chen, Wenlian Lu
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引用次数: 0
Is Disruption Decreasing, or is it Accelerating? 颠覆性变革是在减少还是在加速?
4区 数学 Q4 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2023-03-01 DOI: 10.1142/s0219525923500066
R. Alexander Bentley, Sergi Valverde, Joshua Borycz, Blai Vidiella, Benjamin D. Horne, Salva Duran-Nebreda, Michael J. O'Brien
A recent highly publicized study [Park, M., Leahey, E. and Funk, R. J., Papers and patents are becoming less disruptive over time, Nature 613 (2023) 138–144] claiming that science has become less disruptive over recent decades represents an extraordinary achievement but with deceptive results. The measure of disruption, CD 5 , in this study does not account for differences in citation amid decades of exponential growth in publication rate. In order to account for both the exponential growth as well as the differential impact of research works over time, here we apply a weighted disruption index to the same dataset. We find that, among research papers in the dataset, this weighted disruption index has been close to its expected neutral value over the last fifty years and has even increased modestly since 2000. We also show how the proportional decrease in unique words is expected in an exponentially growing corpus. Finding little evidence for recent decrease in disruption, we suggest that it is actually increasing. Future research should investigate improved definitions of disruption.
最近一项广为宣传的研究[Park, M., Leahey, E.和Funk, R. J.,论文和专利随着时间的推移变得越来越不具破坏性,Nature 613(2023) 138-144]声称科学在最近几十年变得越来越不具破坏性,这代表了一项非凡的成就,但其结果具有欺骗性。在这项研究中,中断的测量,CD 5,并没有考虑到几十年来出版率呈指数增长的引用差异。为了考虑指数增长以及研究工作随时间的不同影响,我们在这里对同一数据集应用加权干扰指数。我们发现,在数据集中的研究论文中,这一加权破坏指数在过去50年里一直接近其预期的中性值,甚至自2000年以来略有增加。我们还展示了如何在指数增长的语料库中预期唯一单词的比例减少。我们发现,几乎没有证据表明干扰最近有所减少,因此我们认为,干扰实际上在增加。未来的研究应该对颠覆的定义进行改进。
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Advances in Complex Systems
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