搜索结果: 1-15 共查到“知识库 生物学 Stochastic”相关记录26条 . 查询时间(0.17 秒)
Evolutionary branching in a stochastic population model with distinct mutational steps
Evolutionary branching genetic drift selection adaptation
2012/5/2
Evolutionary branching is analysed in a stochastic, individual-based population model under mutation and selection. In such models, the common assumption is that individual reproduction and life caree...
Epidemics on a stochastic model of temporal network
Epidemics stochastic model of temporal network Populations and Evolution
2012/5/2
Contacts between individuals serve as pathways where infections may propagate. These contact patterns can be represented by network structures. Static structures have been the common modeling paradigm...
Robustness Against Extinction by Stochastic Sex Determination in Small Populations
Robustness Against Extinction Stochastic Sex Determination Small Populations Populations and Evolution
2012/5/2
Sexually reproducing populations with small number of individuals may go extinct by stochastic fluctuations in sex determination, causing all their members to become male or female in a generation. In...
The mechanics of stochastic slowdown in evolutionary games
mechanics of stochastic slowdown evolutionary games Populations and Evolution
2012/5/2
We study the stochastic dynamics of evolutionary games, and focus on the so-called `stochastic slowdown' effect, previously observed in (Altrock et. al, 2010) for simple evolutionary dynamics. Slowdow...
Asymptotic distribution of motifs in a stochastic context-free grammar model of RNA folding
Asymptotic distribution of motifs stochastic context-free grammar model of RNA folding Biomolecules
2012/5/2
We analyze the distribution of RNA secondary structures given by the Knudsen-Hein stochastic context-free grammar used in the prediction program Pfold. We prove that the distribution of base pairs, he...
Stochastic resonance in a self-repressing gene with transcriptional memory
Stochastic resonance self-repressing gene transcriptional memory Molecular Networks
2012/4/28
Biochemical reaction networks are subjected to large fluctuations due to small molecule numbers, yet underlie reliable biological functions. Most theoretical approaches describe them as purely determi...
Stochastic delocalization of finite populations
Stochastic delocalization finite populations Populations and Evolution
2012/4/28
Heterogeneities in environmental conditions often induce corresponding heterogeneities in the distribution of species. In the extreme case of a localized patch of increased growth rates, reproducing p...
Steady-state parameter sensitivity in stochastic modeling via trajectory reweighting
Steady-state parameter sensitivity stochastic modeling trajectory reweighting
2012/2/28
Parameter sensitivity analysis is a powerful tool in the building and analysis of biochemical network models. For stochastic simulations, parameter sensitivity analysis can be computationally expensiv...
Stochastic theory of protein synthesis and polysome: ribosome profile on a single mRNA transcript
ribosome traffic, master equation, extremum current hypothesis, distance-headway,TASEP.
2011/8/29
The process of polymerizing a protein by a ribosome, using a messenger RNA (mRNA) as the corresponding template, is called translation. Ribosome may be regarded as a molecular motor for which the mRNA...
Infinite-Period Phase Transition versus Nucleation in a Stochastic Model of Collective Oscillations
Infinite-Period Phase Transition Collective Oscillations
2011/9/2
A lattice model of three-state stochastic phase-coupled oscillators has been shown by Wood et al. [Phys. Rev. Lett. 96, 145701 (2006)] to exhibit a phase transition at a critical value of the coupling...
Exact solution of a stochastic protein dynamics model with delayed degradation
protein dynamics model
2011/9/29
We study a stochastic model of protein dynamics that explicitly includes delay in the degradation.We rigorously derive the master equation for the processes and solve it exactly. We show that the equa...
Existence and Uniqueness of the Positive Solution to a Predator-prey Model with Stochastic Perturbation
Itos formula Brownian motion existence and uniqueness
2012/9/24
In this paper, a predator-prey model is estab lished with the modified Holling-type II schemes with stochastic perturbation. We mainly use Lyapun ov function and comparison theorem to show that there ...
Stochastic analysis of a miRNA-protein toggle switch
Toggle switch, chemical master equation, stochastic versus deterministic, biochemical reactions
2011/9/5
Within systems biology there is an increasing interest in the stochastic behavior of genetic and biochemical reaction networks. An appropriate stochastic description is provided by the chemical master...
Stochastic approach and fluctuation theorem for ion transport
Stochastic approach fluctuation theorem ion transport
2011/1/5
We present a stochastic approach for ion transport at the mesoscopic level. The description takes into account the self-consistent electric field generated by the fixed and mobile charges as well as t...
This work faces the problem of the origin of the logarithmic character of the Gompertzian growth. We show that the macroscopic, deterministic Gompertz equation describes the evolution from the initial...