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881.
Charles N. Haas 《Risk analysis》1994,14(6):1097-1100
The task of fitting dose-response models to experimental data can be performed using a spreadsheet with a built-in optimization engine. This paper shows how the task of point and interval estimation can be performed using Microsoft EXCEL. A case study is presented on the carcinogenic dose-response behavior of chloroform. 相似文献
882.
In this paper, we focus on models for recovery data from birds ringed as young. In some cases, it is important to be able to include in these models a degree of age variation in the reporting probability. For certain models this has been found, empirically, to result in completely flat likelihood surfaces, due to parameter redundancy. These models cannot then be fitted to the data, to produce unique parameter estimates. However, empirical evidence also exists that other models with such age variation can be fitted to data by maximum likelihood. Using the approach of Catchpole and Morgan (1996b), we can now identify which models in this area are parameter-redundant, and which are not. Models which are not parameter-redundant may still perform poorly in practice, and this is investigated through examples, involving both real and simulated data. The Akaike Information Criterion is found to select inappropriate models in a number of instances. The paper ends with guidelines for fitting models to data from birds ringed as young, when age dependence is expected in the reporting probability. 相似文献
883.
Philip N. Kokic Lynelle Moon Jane Gooday Ray L. Chambers 《Australian & New Zealand Journal of Statistics》1995,37(2):129-143
The Australian Bureau of Agricultural & Resource Economics (ABARE) has conducted the annual Australian Agricultural and Grazing Industries Survey, covering the broadacre sector, in a consistent format since 1978/79. In this period the incomes of farmers have fluctuated considerably. Interest has focused on temporal income variation because of its relationship to the inherent riskiness of farming. Part of these income fluctuations can be explained by changing commodity prices and by highly variable climatic conditions. This paper outlines a method of measuring the magnitude of this income variation and how it relates to other variables. Due to rotation within the sample of farms surveyed, data are limited for determining the income variability of any particular farm. This paper, using spatial locations of surveyed farms, shows how kernel smoothing techniques can be adapted to estimate the distribution of a farm's income. This analysis uses data collected from 1978/79 to 1991/92. Summary information from these distributions is cross-tabulated against several other variables. This shows that income variability is strongly related to the production mixture of farming businesses. 相似文献
884.
885.
Review of the use of context in statistical image analysis 总被引:1,自引:0,他引:1
SUMMARY This paper is a review of the use of contextual information in statistical image analysis. After defining what we mean by 'context', we describe the Bayesian approach to high-level image analysis using deformable templates. We describe important aspects of work on character recognition and syntactic pattern recognition; in particular, aspects of the work which are relevant to scene understanding. We conclude with a review of some work on knowledge-based systems which use context to aid object recognition. 相似文献
886.
ANDREW J. COOK KEVIN MOORE GARY D. STEEL 《Journal for the theory of social behaviour》2004,34(4):315-331
This article explains how data associated with attitude change and persuasion in mainstream psychology and social psychology can be reinterpreted as evidence of the agentive ability of taking a position. A critical review is made of the elaboration likelihood model and a position model is adapted from positioning theory. The postulates of the elaboration likelihood model are then subjected to critical scrutiny by means of comparison with our position model. In this way regularities associated with attitude change and persuasion are interpreted as evidence of a deliberative process, involving negotiation and the use of supporting and opposing arguments. We present this as evidence of the commonly held agentive ability to position oneself and anticipate the positions of others. 相似文献
887.
888.
K.N. Atkinson 《Long Range Planning》1985,18(3):26-32
The importance of education and training to this country's national performance is increasingly recognized. The introduction of the Youth Training Scheme, offering a year's workbased foundation training to 16- and 17-year-old entrants to the labour market, marks a major advance on Britain's poor record in this field. This article describes the Scheme's aims and mode of operation, traces its long gestation and reviews the progress during its first year. It relates the Scheme to wider national objectives for the development of training and to complementary initiatives in education, and discusses how it might be evaluated. 相似文献
889.
Child sexual abuse prevention programs designed to teach children ways to recognize, resist, and report sexual abuse have proliferated in the past five years. The authors evaluate one such program to find out what children know before instruction, if they learn how to prevent sexual abuse, and how they and their parents and professionals who work with children react to such a program. 相似文献
890.