Qian, S.S., An illustration of model structure identification, Water Resources Bulletin (in press), 1997. Home/Search Document Details and Download
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Career Development Plan in Environmental Statistics: Curriculum.. - Page (Correct)
....Markov random field models have been used for predicting oceanic temperature on a regional scale (Lavine and Lozier, 1997) These applications will also provide the needed innovation in environmental and ecological spatial data analysis (currently dominated by a variety of kriging techniques. See Qian, 1997a) A noteworthy feature of the proposed research is the emphasis on the use of noninformative prior distributions when possible. This is achieved by using various nonparametric methods or hierarchical models. As a result, we are freed from the restriction of using computationally convenient prior ....
.... of the model does not match the structure of the observed patterns of behavior (Beck, 1983) The limit of the commonly use recursive parameter estimation methods (the Kalman filter and its modifications) is that they are dependent on assumed normality of model error (Beck and Young, 1976; Qian, 1997b, 1997c; West and Harrison, 1989) In Beck and Young (1976) the extended Kalman filter (EKF) was used. EKF (and its modifications) uses a first order Taylor expansion to linearize the relationship between model parameters and state variables. This linearization process is replaced by a maximum ....
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Qian, Song S. (1997). "An illustration of model structure identification", Journal of American Water Resources Association 33(4), 811-824.
Estimating the Long-Term Phosphorus Accretion Rate in the.. - Qian, Richardson (1997) (1 citation) Self-citation (Qian) (Correct)
....coefficient can be considered as a constant, in order to estimate the rate coefficient, one must be able to describe the hydraulics of wetlands, which can be proven to be quite challenging. If the flow pattern of a wetland is not correctly described, the estimated rate coefficient may be biased (Qian, 1997). Because of the difficulty in modeling the hydraulics of wetlands, using statistical models for predicting phosphorus retention in wetlands is a good practical alternative. For this purpose, Reckhow and Qian (1994) developed a nonparametric regression model from a cross sectional data set. The ....
.... A description of the study area and data can be found in Reckhow and Qian (1994) In this study, the unit of phosphorus mass loading rate was converted from kg month to g m Gamma2 yr Gamma1 , using the estimated area (size) of the portion of WCA2A that is affected by agriculture runoff in Qian (1997). 5 The Long Term Phosphorus Accretion Rate of WCA2A The Bayesian parameter estimation method discussed in section 3 was applied to the WCA2A data set, to estimate the long term phosphorus accretion rate of WCA2A. The first step of parameter estimation is to define the prior distributions of the ....
Qian, S.S., An illustration of model structure identification, Water Resources Bulletin (in press), 1997.
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