搜索结果: 1-15 共查到“理学 SIR”相关记录17条 . 查询时间(0.106 秒)
随机SIR流行病模型解的渐近性态
It公式 Lyapunov函数 随机干扰 SIR模型 渐近行为
2018/10/8
研究了一类随机SIR流行病模型.构建合适的Lyapunov函数,利用It公式,得出了该模型正解的全局存在唯一性；在该结论的基础上,讨论了随机模型的无病平衡点的渐近行为.在一些条件下,得出随机模型解的上确极限的最大值.
2015年7月31日，美国西北大学Sir Fraser Stoddart教授应邀访问化学所，并作题为“The Nature of the Mechanical Bond”的分子前沿报告。张德清所长主持报告会，并向Sir Fraser Stoddart教授颁发“分子前沿讲座”荣誉证书。
网络上SIR型传播的随机建模与极限定理
密度依赖群体过程 收敛速度 一致收敛 ssize L1收敛
2013/10/18
复杂网络本身及其上的传播过程是最近以来的研究热门,但是多数的工作都只有宏观模型,没有微观基础.本文中,我们将边与边之间的连接与个体的状态变化看作为基本的泊松流,从微观角度构造了网络上SIR型传播的随机模型. 对任意有限的固定时间区间, 在热力学极限下,从随机系统可以得到一个确定性动力系统---所谓的“水动力极限”.这样,本文为这一领域的唯象的动力学模型建立了一个合理的微观基础.同时,我们得到了收敛...
基于BB-SIR方法的结肠癌特征基因提取
特征基因 结肠癌 BB-SIR
2011/11/9
结合复杂数据分析(Complex Data Analysis)理论和充分降维的思想，本文在有效提取结肠癌特征基因研究的基础上，建立结肠癌特征基因提取的BB-SIR模型。该模型方法简洁易懂且有较高的识别率。本文依据BB-SIR模型和所给数据找到了两个结肠癌亚型，并确定了该亚型的特征基因。实验结果表明，BB-SIR方法选出的特征基因能够识别出结肠癌亚型，并且识别正确率达到96%以上。
Distributed SIR-Aware Scheduling in Large-Scale Wireless Networks
Distributed SIR-Aware Large-Scale Wireless Networks Information Theory
2011/8/31
Abstract: Opportunistic scheduling and routing can in principle greatly increase the throughput of decentralized wireless networks, but to be practical they must do so with small amounts of timely sid...
SIR epidemics on a scale-free spatial nested modular network with a non-trivial threshold
Epidemics SIR Reed-Frost percolation long-range directed scale-free modular nested communities hierarchical
2011/8/30
Abstract: We propose a class of random scale-free spatial networks with nested community structures and analyze Reed-Frost epidemics with community related independent transmissions. We show that the ...
一类SIR流行病数学模型稳定性的讨论
传染病 传染病平衡点 局部稳定性 全局稳定性
2012/11/23
介绍了一类SIR流行病数学模型，并对其平衡点的局部和全局稳定性进行了讨论.
A note on Exact solution of SIR and SIS epidemic models
SIR and SIS Epidemiology Exact Solution
2011/2/25
In this article we have successfully obtained an exact solution of a particular case of SIR and SIS epidemic models given by Kermack and Mckendrick [1] for constant population, which are described by ...
We propose and analyze a heterogeneous, multigroup, susceptibleinfectiverecovery (SIR) sexually transmitted disease (STD) model where the desirability and acceptability in partnership formation are fu...
建立一类具有饱和传染率的脉冲免疫接种SIR模型,结合具有常数移民和垂直传染的情况对模型进行分析研究,得到无病周期解,给出此周期解的全局稳定性分析，并获得系统一致持续生存的条件。
1977年诺贝尔物理得奖主Sir Nevill Francis Mott（图）
the electronic structure magnetic disordered systems
2009/8/21
The Nobel Prize in Physics 1977, Sir Nevill Francis Mott, for the fundamental theoretical investigations of the electronic structure of magnetic and disordered systems.
The Nobel Prize in Chemistry 1904，Sir William Ramsay,in recognition of his services in the discovery of the inert gaseous elements in air, and his determination of their place in the periodic system.W...
The Nobel Prize in Chemistry 1947，Sir Robert Robinson，for his investigations on plant products of biological importance, especially the alkaloids.Sir Robert Robinson was born at Rufford, near Chesterf...
1956年诺贝尔化学奖得主Sir Cyril Norman Hinshelwood（图）
Sir Cyril Norman Hinshelwood chemical reactions
2009/8/21
The Nobel Prize in Chemistry 1956，Sir Cyril Norman Hinshelwood，for his researches into the mechanism of chemical reactions.Sir Cyril Norman Hinshelwood was born in London on June 19, 1897. He was educ...
The Nobel Prize in Chemistry 1996，Sir Harold W. Kroto，for his discovery of fullerenes.