Advances in Complex Systems最新文献_第3页

Vibration transmissibility at male and female wrist of the human hand-arm system and modeling 人体手臂系统男女腕部振动传递率及建模

4区数学

Advances in Complex Systems Pub Date : 2023-09-30 DOI: 10.1142/s1793962323500502

Mingzhong Wu, Ming-Zhong Wu, Zhi-Hong Lin

{"title":"Vibration transmissibility at male and female wrist of the human hand-arm system and modeling","authors":"Mingzhong Wu, Ming-Zhong Wu, Zhi-Hong Lin","doi":"10.1142/s1793962323500502","DOIUrl":"https://doi.org/10.1142/s1793962323500502","url":null,"abstract":"The determination of standard values of vibration transmissibility at the wrist of the human body is very important to understanding vibration exposure and developing a valid model. In this work, the effects of human weight, gender, and other factors on the transmissibility of hand–arm vibration and vibration transmissibility in the [Formula: see text]-axis direction at the wrist site were randomly collected from 200 subjects (154 males and 46 females) as per the requirement of the standard ISO 10819. Moreover, the envelopes of the maximum and minimum values, as well as the mean and standard deviation of the vibration transmissibility at the wrist site, were obtained for both genders. Second, the effect of gender differences on the mean value of vibration transmissibility was analyzed. Finally, two three-degree-of-freedom (3-DOF) models of the hand–arm system were developed based on the average values of vibration transmissibility at the wrists of male and female subjects, respectively. The study revealed that the mean value of vibration transmissibility was greater in males than in females in the frequency range of 14–39 Hz. For the rest of the frequency ranges of females, their mean vibration transmissibility is greater than that of males, especially in the range 17–30 Hz. It was also observed that the vibration transmissibility of females is 10–18.5% smaller than that of males. The vibration transmissibility of females is greater than that of males by 40–83% when the frequencies are between 150 Hz and 250 Hz. The novelty of this proposed model is the prediction of model differences between males and females compared to other models that do so without considering gender differences. It is validated that the proposed modified model can be used to predict the vibration transmissibility of the wrist.","PeriodicalId":50871,"journal":{"name":"Advances in Complex Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136272244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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

Advances in Complex Systems Pub Date : 2023-09-29 DOI: 10.1142/s179396232541003x

Yuan Qing

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

Advances in Complex Systems Pub Date : 2023-07-28 DOI: 10.1142/s0219525923500054

Chathura Jayalath, Chathika Gunaratne, W. Rand, Chathurani Seneviratne, I. Garibay

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

Advances in Complex Systems Pub Date : 2023-07-14 DOI: 10.1142/s0219525923400015

Xueying Liu, Zhihao Hu, Xinwei Deng, C. Kuhlman

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

Advances in Complex Systems Pub Date : 2023-06-16 DOI: 10.1142/s0219525923500042

D. Hernández, Marco A. Jiménez, J. A. Bautista

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

Advances in Complex Systems Pub Date : 2023-06-15 DOI: 10.25088/complexsystems.32.1.57

Tomoko Sakiyama

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

Advances in Complex Systems Pub Date : 2023-06-15 DOI: 10.25088/complexsystems.32.1.89

D. E. Rivas-Cisneros

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

Advances in Complex Systems Pub Date : 2023-06-15 DOI: 10.25088/complexsystems.32.1.71

Marlon N. Gonzaga, Marcelo Martins de Oliveira, A. A. Faria

{"title":"Spatial Scale Effects in COVID-19 Spread Models","authors":"Marlon N. Gonzaga, Marcelo Martins de Oliveira, A. A. Faria","doi":"10.25088/complexsystems.32.1.71","DOIUrl":"https://doi.org/10.25088/complexsystems.32.1.71","url":null,"abstract":"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.","PeriodicalId":50871,"journal":{"name":"Advances in Complex Systems","volume":"6 1","pages":"71-87"},"PeriodicalIF":0.4,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88926465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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

Advances in Complex Systems Pub Date : 2023-05-13 DOI: 10.1142/s1793962324410113

A. Roshini, K. V. D. Kiran

{"title":"A lightweight DPT-MAC protocol to increase the network lifetime in wireless body area networks","authors":"A. Roshini, K. V. D. Kiran","doi":"10.1142/s1793962324410113","DOIUrl":"https://doi.org/10.1142/s1793962324410113","url":null,"abstract":"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.","PeriodicalId":50871,"journal":{"name":"Advances in Complex Systems","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135239162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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

Advances in Complex Systems Pub Date : 2023-04-21 DOI: 10.1142/s0219525923500029

C. Zhang, Boyu Chen, Wenlian Lu

引用次数: 0