【摘 要】
:
This article studies the limiting spectral distributions of random birthdeath Q matrices.Under the strictly stationary ergodic conditions,we prove that the empirical spectral distribution converges we
【机 构】
:
Shanghai Jiao Tong Univ.
论文部分内容阅读
This article studies the limiting spectral distributions of random birthdeath Q matrices.Under the strictly stationary ergodic conditions,we prove that the empirical spectral distribution converges weakly to a non-random probability distribution.
其他文献
The roots of a rational function in quotient form are simply those of the numerator polynomial,which can be computed via linearization.
现代工业的飞速发展,使得生产过程中排放的重金属污染物急剧增加.重金属由于其易富集和难降解,对水体和土壤中存在的生物和微生物乃至人类健康均带来了严重的威胁.蒙脱石作为一种廉价丰富、环境友好的天然矿物材料,对水体中的重金属阳离子具有极佳的吸附效果.而如何对吸附了重金属阳离子的废弃蒙脱石进行安全合理的处理,成为了蒙脱石被广泛用于重金属污染控制的重要前提.
现如今突发危机事件层出不穷,给人们的生命财产带来了重大的损失,给人们的心理造成了严重的影响。本文以风险感知作为风险事件中人群心理研究的重要切入点,选取川东北地区普光气田作为调查研究区域,将毒气泄漏事件、火灾爆炸事件和突发性环境污染事故等三种在该区域发生概率较高的事件作为重点调查研究事件,重点针对人群的风险感知过程、风险感知的影响因子剖析以及感知风险的定量化计算,文中应用的核心方法是心理测量范式。通
来自于不同排放源的气溶胶会对大气细颗粒物的物理化学性质产生不同影响.由于气象条件、经济布局等因素,作为国内大气污染最严重的区域之一,长三角区域受到多种排放源的影响,生物质燃烧源和工业排放是其中非常重要的气溶胶来源.本文利用单颗粒飞行时间质谱仪(SPAMS)和在线气体组分及气溶胶分析仪(MARGA)对南京市郊区的细颗粒物进行了外场观测,对比研究不同类型颗粒物的混合状态.
:环境中天然的孕激素主要来源于人类日常生活、畜牧养殖和水产养殖的代谢物(粪便和尿液)[1,2]。此外,为了防治疾病、避孕以及促进动物生长并提高产肉率,天然的和人工合成的孕激素还广泛应用于人体和动物体[3,4]。这些激素物质及其代谢产物不断释放到环境中,可能给陆生生物和水生生物带来生态风险。本研究选取中国南方的两个典型养猪场,采用UHPLC-MS/MS法检测了猪场及周边环境中孕激素的污染现状,考察了
We study the weak approximation for non-smooth functionals of(reflected)stochastic differential equations with irregular drift and constant diffusion coefficient,when their solution is approximated by
To test regression coefficients of linear panel models,the FW-test based on within estimation of regression coefficients often is suggested.
The linear assumption between the non-parametrically transformed response and the covariates in the traditional linear transformed models may not be satisfied in practice.
For a ROM to be stable and accurate,the dynamics of the truncated subspace must be accounted for.This talk proposes an approach for stabilizing and fine-tuning projection-based fluid ROMs in which tru
Energy corrected schemes compensate the pollution effect for finite element problems where local point singularities otherwise lead to a globally reduced order of convergence.