搜索结果: 1-15 共查到“管理学 presence”相关记录23条 . 查询时间(0.046 秒)
Inference from presence-only data;the ongoing controversy
presence-only data ongoing controversy
2015/8/21
Presence-only data abounds in ecology, often accompanied by a background sample. Although many interesting aspects of the species’ distribution can be learned from such data, one cannot learn the over...
Simulation-based Response Surface Estimation in the Presence of Monotonicity
Simulation-based Response Surface Estimation Presence Monotonicity
2015/7/6
In many stochastic models, it is known that the response surface corresponding to a particular performance measure is monotone in the underlying parameter. For example, the steady-state mean waiting t...
Trapped bright matter-wave solitons in the presence of localized inhomogeneities
Solitary wave dynamics condensate power soliton dynamics
2014/12/25
We examine the dynamics of a bright solitary wave in the presence of a repulsive or attractive localized “impurity” in Bose–Einstein condensates (BECs). We study the generation and stability of a pair...
Matter-wave solitons in the presence of collisional inhomogeneities: Perturbation theory and the impact of derivative terms
Dynamic soliton atomic scattering length nonlinear dynamic
2014/12/24
We investigate the dynamics of matter-wave solitons in the presence of a spatially varying atomic scattering length and nonlinearity. The dynamics of bright and dark solitary waves is studied using th...
Stability and dynamics of matter-wave vortices in the presence of collisional inhomogeneities and dissipative perturbations
Spectral properties vortex bose-einstein condensate harmonic trap negative energy pattern precession vortex power trap
2014/12/24
In this work, the spectral properties of a singly charged vortex in a Bose–Einstein condensate confined in a highly anisotropic (disc-shaped) harmonic trap are investigated. Special emphasis is placed...
A General Family of Estimators for Estimating Population Mean in Systematic Sampling Using Auxiliary Information in the Presence of Missing Observations
Family of estimators Auxiliary information Mean square error Non-response Systematic sampling
2013/6/14
This paper proposes a general family of estimators for estimating the population mean in systematic sampling in the presence of non-response adapting the family of estimators proposed by Khoshnevisan ...
Bayesian Modeling and MCMC Computation in Linear Logistic Regression for Presence-only Data
Bayesian modeling case-control design data augmentation logistic regres-sion Markov Chain Monte Carlo population prevalence presence-only data simulation
2013/6/13
Presence-only data are referred to situations in which, given a censoring mechanism, a binary response can be observed only with respect to on outcome, usually called \textit{presence}. In this work w...
Volatility Inference in the Presence of Both Endogenous Time and Microstructure Noise
It^o Process Realized Volatility Integrated Volatility Time Endogeneity Market Microstructure Noise
2013/5/2
In this article we consider the volatility inference in the presence of both market microstructure noise and endogenous time. Estimators of the integrated volatility in such a setting are proposed, an...
Testing in the Presence of Nuisance Parameters: Some Comments on Tests Post-Model-Selection and Random Critical Values
Nuisance Parameters Post-Model-Selection Random Critical Values
2012/11/22
We point out that the ideas underlying some test procedures recently proposed for testing post-model-selection (and for some other test problems) in the econometrics literature have been around for qu...
Unified Analysis of Transmit Antenna Selection/Space-Time Block Coding with Receive Selection and Combining over Nakagami-m Fading Channels in the Presence of Feedback Errors
Space-Time Block Coding (STBC) Transmit Antenna Selection (TAS) Receive Antenna Selection (RAS) Maximal-ratio Combining (MRC) Selection Combining (SC) Nakagami-m fading Feedback Errors
2012/9/18
Examining the effect of imperfect transmit antenna selection (TAS) caused by the feedback link errors on the performance of hybrid TAS/space-time block co ding (STBC) with selection combining (SC) (i....
Statistical Inference of Allopolyploid Species Networks in the Presence of Incomplete Lineage Sorting
Allopolyploid hybridization Bayesian phylogenetics network
2012/9/18
Polyploidy is an important speciation mechanism, particularly in land plants. Allopolyploid species are formed after hybridization betweenother-wise intersterile parental species. Recent theoretical p...
Testing instantaneous causality in presence of non constant unconditional variance
VAR model Unconditionally heteroscedastic errors Instantaneous causal-ity.
2012/9/19
The problem of testing instantaneous causality between variables with time-varying unconditional variance is investigated. It is shown that the classi-cal tests based on the assumption of stationary p...
Compound decision in the presence of proxies with an application to spatio-temporal data
Statistics Theory (math.ST) Methodology (stat.ME)
2010/12/17
We study the problem of incorporating covariates in a compound decision setup. It is desired to estimate the means of $n$ response variables, which are independent and normally distributed, and each i...
TESTING THE NULL OF CO-INTEGRATION IN THE PRESENCE OF VARIANCE BREAKS
Co-integration tests variance shifts fixed regressor bootstrap
2010/11/5
We show that changes in the innovation covariance matrix of a vector of
series can generate spurious rejections of the null hypothesis of co-integration when
applying standard residual-based co-inte...
ASYMPTOTIC DISTRIBUTION OF UNBIASED LINEAR ESTIMATORS IN THE PRESENCE OF HEAVY-TAILED STOCHASTIC REGRESSORS AND RESIDUALS
Asymptotic distribution rate of convergence stochastic regressor stable non-Gaussian
2009/9/18
Under the symmetric a-stable distributional assumption
for the disturbances, Blattberg and Sargent [3] consider unbiased linear
estimators for a regression model with non-stochastic regressors.
We ...