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“人造活性物质涌现集群行为”研究的系列进展（图）
人造活性物质 集群行为 自驱动单元 非平衡体系
2023/1/6
活性物质是由自驱动单元所组成的一类重要非平衡体系，普遍地存在于自然界之中，包括从纳米尺度的马达蛋白，到微米尺度的细菌，再到宏观尺度的鸟群等。活性物质由于在单粒子层面破缺了时间反演对称性，因此经常展现出自发的集群运动行为。活性物质集群行为是非平衡统计物理的重要研究方向，也是2021年Nobel物理学奖所涵盖的领域之一。
高山森林溪流凋落叶冬季水溶性碳含量动态
凋落物分解 高山森林 溪流 水溶性碳
2016/4/14
凋落物分解过程中水溶性碳是高山森林溪流生态系统碳的重要来源,其在溪流中的流动转移不仅会影响下游水质环境,而且其含量动态受冬季季节性雪被形成及消融过程的深刻影响,但缺乏必要关注.因此,采用凋落叶分解袋法,以川西高山森林典型乔木(四川红杉Larix mastersiana、方枝柏Sabina saltuaria)和灌木(高山杜鹃Rhododendron lapponicum、康定柳Salix para...
Joint Modeling and Registration of Cell Populations in Cohorts of High-Dimensional Flow Cytometric Data
Joint Modeling Registration Cell Populations Cohorts High-Dimensional Flow Cytometric Data
2013/6/14
In systems biomedicine, an experimenter encounters different potential sources of variation in data such as individual samples, multiple experimental conditions, and multi-variable network-level respo...
Review of: Mixed Effects Models and Extensions in Ecology with R
Mixed Effects Models Extensions in Ecology R
2013/6/14
This is a review of the book "Mixed Effects Models and Extensions in Ecology with R" by Zuur, Ieno, Walker, Saveliev and Smith (2009, Springer). I was asked to review this book for The American Statis...
Factored expectation propagation for input-output FHMM models in systems biology
input output factored hidden Markov models approximate inference variational inference expectation propagation systems biology microarray data
2013/6/14
We consider the problem of joint modelling of metabolic signals and gene expression in systems biology applications. We propose an approach based on input-output factorial hidden Markov models and pro...
Investigating the relationship between biodiversity and ecosystem multifunctionality: Challenges and solutions
Investigating relationship between biodiversity ecosystem multifunctionality Challenges solutions
2013/6/14
Extensive research shows that more species-rich assemblages are generally more productive and efficient in resource use than comparable assemblages with fewer species. But the question of how diversit...
A method for generating realistic correlation matrices
method generating realistic correlation matrices
2011/7/6
Simulating sample correlation matrices is important in many areas of statistics. Approaches such as generating normal data and finding their sample correlation matrix or generating random uniform $[-1...
On tail trend detection: modeling relative risk
extreme value distribution regular variation extreme rainfall
2011/7/6
A simple and natural model is introduced for studying a trend in the tail of a probability distribution over time (or over space).
Distortion risk measures for sums of dependent losses
Coherence Dependence structure Distortion function Risk measure Risk theory
2011/7/5
We discuss two distinct approaches, for distorting risk measures of sums of dependent random variables, which preserve the property of coherence. The first, based on distorted expectations, operates o...
Poisson approximation for search of rare words in DNA sequences
Poisson approximation Chen-Steinmethod mixing processes Markov chains rare words
2009/6/12
Poisson approximation for search of rare words in DNA sequences.
Positivity of Brownian Transition Densities
Transition Densities Brownian Motion Eigenvalue Expansion Fine Topology Regular Points
2009/5/8
Let $B$ be a Borel subset of $R^d$ and let $p(t,x,y)$ be the transition densities of Brownian motion killed on leaving $B$. Fix $x$ and $y$ in $B$. If $p(t,x,y)$ is positive for one $t$, it is positiv...