搜索结果: 1-15 共查到“数学 population”相关记录25条 . 查询时间(0.1 秒)
Applying the Wiener-Hermite Random Technique to Study the Evolution of Excess Weight Population in the Region of Valencia (Spain)
Random SIS Type—Epidemiological Model Wiener—Hermite Expansion Perturbation Method
font style='font-size:12px;'>
2013/1/30
This paper proposes a stochastic model to study the evolution of normal and excess weight population between 24 - 65 years old in the region of Valencia (Spain). An approximate solution process of the...
Estimating Hidden Population Size using Respondent-Driven Sampling Data
Respondent-Driven Sampling Data Estimating Hidden Population Size
font style='font-size:12px;'>
2012/11/23
Respondent-Driven Sampling (RDS) is an approach to sampling design and inference in hard-to-reach human populations. Typically, a sampling frame is not available, and population members are difficult ...
People born in the Middle East but residing in the Netherlands: Invariant population size estimates and the role of active and passive covariates
Population size estimation capture-Crecapture collapsbility multiple record-systems estimation missing data structural zeros
font style='font-size:12px;'>
2012/11/23
Including covariates in loglinear models of population registers improves population size estimates for two reasons. First, it is possible to take heterogeneity of inclusion probabilities over the lev...
Posterior contraction of the population polytope in finite admixture models
latent mixing measures convex polytope population structure topic simplex
font style='font-size:12px;'>
2012/6/7
We study the posterior contraction behavior of the latent population structure that arises in admixture models as the amount of data increases. An admixture model --- alternatively known as a topic mo...
Adaptation and migration of a population between patches
Structured populations phenotypical and spatial structure Hamilton-Jacobi equation viscosity solutions Dirac concentrations stationary solutions
font style='font-size:12px;'>
2012/4/23
A Hamilton-Jacobi formulation has been established previously for phenotypical structured population models where the solution concentrates as Dirac masses in the limit of small diffusion. Is it possi...
A host-parasite model for a two-type cell population
Cell division branching within branching branching process in random environment host-parasite model
font style='font-size:12px;'>
2012/4/18
A host-parasite model is considered for a population of cells that can be of two types, A or B, and exhibits unilateral reproduction: while a B-cell always splits into two cells of the same type, the ...
Contracting Quadratic Operators of Bisexual Population
Quadratic stochastic operator fixed point trajectory contracting operators
font style='font-size:12px;'>
2012/4/18
In this paper we find a sufficient condition under which the operator of bisexual population is contraction and show that this condition is not necessary.
Historical superprocess limits for population models with past dependence and competition
Historical superprocess interacting particle system limit theorem
font style='font-size:12px;'>
2011/9/1
Abstract: We consider a population structured in trait. When a birth occurs, the trait of the parent is hereditarily transmitted to the offspring unless a mutation occurs. We associate with each indiv...
Determinants of Population Growth in Rajasthan: An Analysis
Determinants of Population Rajasthan Analysis
font style='font-size:12px;'>
2011/1/17
Rajasthan is the biggest State of India and is currently in the second phase of demographic
transition and is moving towards the third phase of demographic transition with very slow
pace.
Confidence interval for the difference of two normal population means with a known ratio of variances
Coverage probability Expected length
font style='font-size:12px;'>
2010/9/20
Motivated by the recent work of Schechtman and Sherman [The twosample t-test with a known ratio of variances. Statistical Methodology 4, 508-514, (2007).], we investigate, in this paper, a new exact c...
Convergence of numerical solutions to stochastic age-dependent population equations driven by non-Gaussian noise
stochastic age-dependent population equations compensated Poisson random measure
font style='font-size:12px;'>
2010/9/25
It presents and analyzes the Euler methods for stochastic age-dependent population equations driven by Poisson random jump measure; Under the Local Lipschitz condition, we prove that the Euler approxi...
Estimating the population mean using stratified median ranked set sampling
Simple random sampling ranked set sampling
font style='font-size:12px;'>
2010/9/26
In this paper, stratified median ranked set sampling (SMRSS) method is suggested for estimating the population mean. The SMRSS is compared with simple random sampling (SRS), stratified simple random s...
A Structured Population Model of Cell Differentiation
Structured population dynamics transport equation stem cells cell differentiation
font style='font-size:12px;'>
2011/1/18
We introduce and analyze several aspects of a new model for cell differentiation.It assumes that differentiation of progenitor cells is a continuous process. From the mathematical point of view, it is...
Time Reversal of Some Stationary Jump-Diffusion Processes from Population Genetics
Jump-Diffusion Processes Population Genetics
font style='font-size:12px;'>
2010/11/19
We describe the processes obtained by time reversal of a class of stationary jump-diffusion processes that model the dynamics of genetic variation in populations subject to repeated bottlenecks. Assu...
Mathematical analysis of a two-dimensional population model of metastatic growth including angiogenesis
2D structured populations semigroup asymptotic behavior malthus parameter
font style='font-size:12px;'>
2010/12/6
Angiogenesis is a key process in the tumoral growth which allows the cancerous tissue to impact on its vasculature in order to improve the nutrient’s supply and the metastatic process. In this paper, ...