An approximate method dealing with the spectral-density function in the system of randomly distributed spins is presented, assuming a general interaction with distance dependence of R. This method allows us to cover the whole range of concentration and accordingly to interpolate two existing theories ...
2. ui 部分 用R自带的 faithful 数据集,给出了老忠泉(Old Faithful geyser 喷泉)喷发之间的等待时间和喷发的持续时间. 部分数据 library(shiny) shinyUI(bootstrapPage( # 这里用 bootstrapPage( ) selectInput("n_breaks", # n个条 "Number of bins in histogram(approximate):", c(10, 20, 35, 50)...
the concept of the DFT method is to reduce the computational cost by defining a relation between the single-particle densityρ(r) that relies only on the spatial coordination and the wave-function Ψ({r}). Thus, DFT converts the many-particle equation (Eq.9.3), to a single particle equat...
Since we cannot measure the function n(x) directly in experimental crowds, we instead consider discrete counts of individuals within equal area bins (quadrats)26. Thus, to make contact with experiments we discretize Eq. 1 as \(H = \mathop {\sum}\nolimits_b \left( {f_{N_b} + v_bN...
Carroll,Glenn,R.,Hannan,Michael,T.摘要: A model of density dependence is proposed to explain regularities in the growth and decline of organizational populations. Density--the number of organizations--assumed to be a function of the social processes of legitimation and competition. At low density...
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A formally exact expression for the interaction density response function χ(r,r,ω) exists in terms of (i) its noninteracting counterpart χ(r,r,ω) and (ii) an exchange (x)-correlation (c) kernel f(r,r,ω). In the absence of a first-principles theory for the ω dependence of f...
Nowadays, the search for a distribution capable of modeling the probability density function (PDF) of irradiance data under all conditions of atmospheric t... R Barrios,F Dios - 《Optics Express》 被引量: 91发表: 2012年 Exponentiated Weibull distribution family under aperture averaging for Gaussia...
Here, the R function skerd(x,op=TRUE,kernel=‘gaussian’) is supplied in the event there is a desire to plot the data based on this collection of estimators. When op=TRUE, the function uses the default density estimator employed by R; otherwise, it uses the method recommended by ...
along with the relative energy errors for DFT compared to CC for each conformer (bottom). Note that the DFT energy errors are not a simple function of the energy relative to the minimum energy geometry (see Supplementary Fig.2), as short O–H bond lengths tend to be too high in energy...