Mathematical Biosciences and Engineering最新文献_第5页

A mathematical model of flavescence dorée in grapevines by considering seasonality. 考虑季节性因素的葡萄树黄变的数学模型。

IF 2.6 4区工程技术

Mathematical Biosciences and Engineering Pub Date : 2024-11-13 DOI: 10.3934/mbe.2024332

Fernando Huancas, Aníbal Coronel, Rodolfo Vidal, Stefan Berres, Humberto Brito

引用次数: 0

Mathematical modeling of the parasitism and hyperparasitism increase on Halyomorpha halys eggs in a five-year survey in Northern Italy. 在意大利北部对Halyomorpha halys卵进行的一项为期五年的调查中，寄生性和超寄生性增加的数学模型。

IF 2.6 4区工程技术

Mathematical Biosciences and Engineering Pub Date : 2024-11-11 DOI: 10.3934/mbe.2024330

Ezio Venturino, Francesco Cantaloni, Luciana Tavella, Silvia Moraglio, Francesco Tortorici

{"title":"Mathematical modeling of the parasitism and hyperparasitism increase on Halyomorpha halys eggs in a five-year survey in Northern Italy.","authors":"Ezio Venturino, Francesco Cantaloni, Luciana Tavella, Silvia Moraglio, Francesco Tortorici","doi":"10.3934/mbe.2024330","DOIUrl":"https://doi.org/10.3934/mbe.2024330","url":null,"abstract":"The invasive stink bug Halyomorpha halys has become an important pest of many crops, causing severe economic losses to farmers. Control of the pest mainly relies on multiple applications of broad-spectrum insecticides, undermining the integrated pest management programs and causing secondary pest outbreaks. In the native area, egg parasitoids are the main natural enemies of H. halys, among which Trissolcus japonicus is considered the predominant species. In Italy, adventive populations of T. japonicus and Trissolcus mitsukurii, another egg parasitoid of H. halys in Japan, have established themselves. These two species, together with the indigenous Anastatus bifasciatus, are capable of attacking the eggs of the exotic host. Focusing on the situation in Northern Italy, where also the hyperparasitoid Acroclisoides sinicus is present, a discrete-time model is developed for the simulation of the pest evolution. It is based on actual field data collected over a timespan of five years. The simulations indicate that egg parasitoid by themselves do not suppress populations to non-pest levels, but can play an important role in reducing their impact. Both the data from the five-year surveys and those available in the literature are used in the model. It has some limitations in the fact that climatic conditions were not considered, while more accurate simulations could be performed with additional collection of field data, which at the moment are based on partial field observations not sampled at the same sites.","PeriodicalId":49870,"journal":{"name":"Mathematical Biosciences and Engineering","volume":"21 11","pages":"7501-7529"},"PeriodicalIF":2.6,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142856536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The impact of immune cell interactions on virus quasi-species formation. 免疫细胞相互作用对病毒准种形成的影响。

IF 2.6 4区工程技术

Mathematical Biosciences and Engineering Pub Date : 2024-11-11 DOI: 10.3934/mbe.2024331

Ali Moussaoui, Vitaly Volpert

引用次数: 0

Cooperation in the face of crisis: effect of demographic noise in collective-risk social dilemmas. 危机下的合作：人口噪声在集体风险社会困境中的作用。

IF 2.6 4区工程技术

Mathematical Biosciences and Engineering Pub Date : 2024-11-06 DOI: 10.3934/mbe.2024329

José F Fontanari

{"title":"Cooperation in the face of crisis: effect of demographic noise in collective-risk social dilemmas.","authors":"José F Fontanari","doi":"10.3934/mbe.2024329","DOIUrl":"https://doi.org/10.3934/mbe.2024329","url":null,"abstract":"In deciding whether to contribute to a public good, people often face a social dilemma known as the tragedy of the commons: either bear the cost of promoting the collective welfare, or free-ride on the efforts of others. Here, we study the dynamics of cooperation in the context of the threshold public goods games, in which groups must reach a cumulative target contribution to prevent a potential disaster, such as an environmental crisis or social unrest, that could result in the loss of all private wealth. The catch is that the crisis may never materialize, and the investment in the public good is lost. Overall, higher risk of loss promotes cooperation, while larger group size tends to undermine it. For most parameter settings, free-riders (defectors) cannot be eliminated from the population, leading to a coexistence equilibrium between cooperators and defectors for infinite populations. However, this equilibrium is unstable under the effect of demographic noise (finite population), since the cooperator-only and defector-only states are the only absorbing states of the stochastic dynamics. We use simulations and finite-size scaling to show that cooperators eventually die off and derive scaling laws for the transient lifetimes or half-lives of the coexistence metastable state. We find that for high risk, the half-life of cooperators increases exponentially with population size, while for low risk, it decreases exponentially with population size. At the risk threshold, where the coexistence regime appears in a discontinuous manner, the half-life increases with a power of the population size.","PeriodicalId":49870,"journal":{"name":"Mathematical Biosciences and Engineering","volume":"21 11","pages":"7480-7500"},"PeriodicalIF":2.6,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142856510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A stage structured model for mosquito suppression with immigration. 移民灭蚊的阶段结构模型。

IF 2.6 4区工程技术

Mathematical Biosciences and Engineering Pub Date : 2024-11-01 DOI: 10.3934/mbe.2024328

Mugen Huang, Zifeng Wang, Zixin Nie

{"title":"A stage structured model for mosquito suppression with immigration.","authors":"Mugen Huang, Zifeng Wang, Zixin Nie","doi":"10.3934/mbe.2024328","DOIUrl":"https://doi.org/10.3934/mbe.2024328","url":null,"abstract":"The incompatible insect technique based on Wolbachia is a promising alternative to control mosquito-borne diseases, such as dengue fever, malaria, and Zika, which drives wild female mosquitoes sterility through a mechanism cytoplasmic incompatibility. A successful control program should be able to withstand the perturbation induced by the immigration of fertilized females from surrounding uncontrolled areas. In this paper, we formulated a system of delay differential equations, including larval and adult stages, interfered by Wolbachia-infected males. We classified the release number of infected males and immigration number of fertile females, to ensure that the system displays globally asymptotically stable or bistable dynamics. The immigration of fertile females hinders the maximum possible suppression efficiency so that the wild adults cannot be reduced to a level below $ A^*_infty $. We identified the permitted most migration number to reduce the wild adults to a target level. To reduce up to $ 90% $ of wild adults in the peak season within two months, an economically viable strategy is to reduce the immigration number of wild females less than $ 0.21% $ of the carrying capacity of adults in the control area.","PeriodicalId":49870,"journal":{"name":"Mathematical Biosciences and Engineering","volume":"21 11","pages":"7454-7479"},"PeriodicalIF":2.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142856505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An epidemiological modeling investigation of the long-term changing dynamics of the plague epidemics in Hong Kong. 香港鼠疫流行长期变化动态的流行病学模型研究。

IF 2.6 4区工程技术

Mathematical Biosciences and Engineering Pub Date : 2024-10-28 DOI: 10.3934/mbe.2024327

Salihu S Musa, Shi Zhao, Winnie Mkandawire, Andrés Colubri, Daihai He

{"title":"An epidemiological modeling investigation of the long-term changing dynamics of the plague epidemics in Hong Kong.","authors":"Salihu S Musa, Shi Zhao, Winnie Mkandawire, Andrés Colubri, Daihai He","doi":"10.3934/mbe.2024327","DOIUrl":"https://doi.org/10.3934/mbe.2024327","url":null,"abstract":"Identifying epidemic-driving factors through epidemiological modeling is a crucial public health strategy that has substantial policy implications for control and prevention initiatives. In this study, we employ dynamic modeling to investigate the transmission dynamics of pneumonic plague epidemics in Hong Kong from 1902 to 1904. Through the integration of human, flea, and rodent populations, we analyze the long-term changing trends and identify the epidemic-driving factors that influence pneumonic plague outbreaks. We examine the dynamics of the model and derive epidemic metrics, such as reproduction numbers, that are used to assess the effectiveness of intervention. By fitting our model to historical pneumonic plague data, we accurately capture the incidence curves observed during the epidemic periods, which reveals some crucial insights into the dynamics of pneumonic plague transmission by identifying the epidemic driving factors and quantities such as the lifespan of flea vectors, the rate of rodent spread, as well as demographic parameters. We emphasize that effective control measures must be prioritized for the elimination of fleas and rodent vectors to mitigate future plague outbreaks. These findings underscore the significance of proactive intervention strategies in managing infectious diseases and informing public health policies.","PeriodicalId":49870,"journal":{"name":"Mathematical Biosciences and Engineering","volume":"21 10","pages":"7435-7453"},"PeriodicalIF":2.6,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142856441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identifiability investigation of within-host models of acute virus infection. 急性病毒感染宿主模型的可识别性研究。

IF 2.6 4区工程技术

Mathematical Biosciences and Engineering Pub Date : 2024-10-28 DOI: 10.3934/mbe.2024325

Yuganthi R Liyanage, Nora Heitzman-Breen, Necibe Tuncer, Stanca M Ciupe

引用次数: 0

MDRN: Multi-distillation residual network for efficient MR image super-resolution. 基于多蒸馏残差网络的高效磁共振图像超分辨。

IF 2.6 4区工程技术

Mathematical Biosciences and Engineering Pub Date : 2024-10-28 DOI: 10.3934/mbe.2024326

Liwei Deng, Jingyi Chen, Xin Yang, Sijuan Huang

{"title":"MDRN: Multi-distillation residual network for efficient MR image super-resolution.","authors":"Liwei Deng, Jingyi Chen, Xin Yang, Sijuan Huang","doi":"10.3934/mbe.2024326","DOIUrl":"https://doi.org/10.3934/mbe.2024326","url":null,"abstract":"Super-resolution (SR) of magnetic resonance imaging (MRI) is gaining increasing attention for being able to provide detailed anatomical information. However, current SR methods often use the complex convolutional network for feature extraction, which is difficult to train and not suitable for limited computation resources in the medical scenario. To tackle these bottlenecks, we propose a multi-distillation residual network (MDRN) for more differential feature refinement, which has a superior trade-off between reconstruction accuracy and computation cost. Specifically, a novel feature multi-distillation residual block with a contrast-aware channel attention module was designed to make the residual features more focused on low-vision information, which maximizes the power of MDRN. Comprehensive experiments demonstrate the superiority of our MDRN over state-of-the-art methods in reconstruction quality and efficiency. Our method outperforms other existing methods in peak signal-noise ratio by up to 0.44-1.82 dB in 4× scale when GPU memory and runtime are lower than in other SR methods. The source code will be available at https://github.com/Jennieyy/MDRN.","PeriodicalId":49870,"journal":{"name":"Mathematical Biosciences and Engineering","volume":"21 10","pages":"7421-7434"},"PeriodicalIF":2.6,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142856495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Saturated lysing efficiency of CD8⁺ cells induced monostable, bistable and oscillatory HIV kinetics. CD8+细胞的饱和裂解效率诱导单稳态、双稳态和振荡HIV动力学。

IF 2.6 4区工程技术

Mathematical Biosciences and Engineering Pub Date : 2024-10-22 DOI: 10.3934/mbe.2024324

Shilian Xu

{"title":"Saturated lysing efficiency of CD8+ cells induced monostable, bistable and oscillatory HIV kinetics.","authors":"Shilian Xu","doi":"10.3934/mbe.2024324","DOIUrl":"https://doi.org/10.3934/mbe.2024324","url":null,"abstract":"Effector CD8+ cells lyse human immunodeficiency viruses (HIV)-infected CD4+ cells by recognizing a viral peptide presented by human leukocyte antigens (HLA) on the CD4+ cell surface, which plays an irreplaceable role in within-host HIV clearance. Using a semi-saturated lysing efficiency of a CD8+ cell, we discuss a model that captures HIV dynamics with different magnitudes of lysing rate induced by different HLA alleles. With the aid of local stability analysis and bifurcation plots, exponential interactions among CD4+ cells, HIV, and CD8+ cells were investigated. The system exhibited unexpectedly complex behaviors that were both mathematically and biologically interesting, for example monostability, periodic oscillations, and bistability. The CD8+ cell lysing rate, the CD8+ cell count, and the saturation effect were combined to determine the HIV kinetics. For a given CD8+ cell count, a low CD8+ cell lysing rate and a high saturation effect led to monostability to a high viral titre, and a low CD8+ cell lysing rate and a low saturation effect triggered periodic oscillations; this explained why patients with a non-protective HLA allele were always associated with a high viral titer and exhibited bad infection control. On the other hand, a high CD8+ cell lysing rate led to bistability and monostability to a low viral titer; this explained why protective HLA alleles are not always associated with good HIV infection outcomes. These mathematical results explain how differences in HLA alleles determine the variability in viral infection.","PeriodicalId":49870,"journal":{"name":"Mathematical Biosciences and Engineering","volume":"21 10","pages":"7373-7393"},"PeriodicalIF":2.6,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142856501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A holistic physics-informed neural network solution for precise destruction of breast tumors using focused ultrasound on a realistic breast model. 一个全面的物理信息的神经网络解决方案，用于乳腺肿瘤的精确破坏使用聚焦超声在一个现实的乳房模型。

IF 2.6 4区工程技术

Mathematical Biosciences and Engineering Pub Date : 2024-10-18 DOI: 10.3934/mbe.2024323

Salman Lari, Hossein Rajabzadeh, Mohammad Kohandel, Hyock Ju Kwon

{"title":"A holistic physics-informed neural network solution for precise destruction of breast tumors using focused ultrasound on a realistic breast model.","authors":"Salman Lari, Hossein Rajabzadeh, Mohammad Kohandel, Hyock Ju Kwon","doi":"10.3934/mbe.2024323","DOIUrl":"https://doi.org/10.3934/mbe.2024323","url":null,"abstract":"This study presented a novel approach for the precise ablation of breast tumors using focused ultrasound (FUS), leveraging a physics-informed neural network (PINN) integrated with a realistic breast model. FUS has shown significant promise in treating breast tumors by effectively targeting and ablating cancerous tissue. This technique employs concentrated ultrasonic waves to generate intense heat, effectively destroying cancerous tissue. In previous finite element method (FEM) models, the computational demands of handling extensive datasets, multiple dimensions, and discretization posed significant challenges. Our PINN-based solution operated efficiently in a mesh-free domain, achieving remarkable accuracy with significantly reduced computational demands, compared to conventional FEM techniques. Additionally, employing PINN for estimating partial differential equations (PDE) solutions can notably decrease the enormous number of discretized elements needed. The model employed a bowl-shaped acoustic transducer to focus ultrasound waves accurately on the tumor location. The simulation results offered detailed insights into each step of the FUS treatment process, including the generation of acoustic waves, the targeting of the tumor, and the subsequent heating and ablation of cancerous tissue. By applying a 3.8 nm displacement amplitude of transducer input pulse at a frequency of 1.1 MHz for 1 second, the temperature at the focal point elevated to 38.4 ℃, followed by another 90 seconds of cooling time, which resulted in significant necrosis of the tumor tissues. Validation of the PINN model's accuracy was conducted through FEM analysis, aligning closely with real-world FUS therapy scenarios. This innovative model provided physicians with a predictive tool to estimate the necrosis of tumor tissue, facilitating the customization of FUS treatment strategies for individual breast cancer patients.","PeriodicalId":49870,"journal":{"name":"Mathematical Biosciences and Engineering","volume":"21 10","pages":"7337-7372"},"PeriodicalIF":2.6,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142856427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0