排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
Regression diagnostics are introduced for parameters in marginal association models for clustered binary outcomes in an implementation
of generalized estimating equations. Estimating equations for intracluster correlations facilitate computational formulae
for one-step deletion diagnostics in an extension of earlier work on diagnostics for parameters in the marginal mean model.
The proposed diagnostics measure the influence of an observation or a cluster of observations on the estimated regression
parameters and on the overall fit of the model. The diagnostics are applied to data from four research studies from public
health and medicine. 相似文献
2.
Lopes MG de Gouveia Vilela RA de Almeida IM Mioto OL Takahashi MA Perin FO 《Work (Reading, Mass.)》2012,41(Z1):3148-3154
In 2010, an accident occurred in Americana-SP, Brazil, involving two trains and one bus on a Grade Crossing, when 10 people died and 17 were injured including workers. This paper aims to analyze the accident using the Model of Analysis and Prevention of Work Accidents (MAPA). The method provides observation of work, interviews and analysis of documents to understand precedents of the event in the following stages: to understand the usual work from the involved people, the changes occurred in the system, the operation of barriers, managerial and organizational aspects. By the end, measures are suggested to avoid new occurrences. The accident took place at night in a site with insufficient lighting. The working conditions of bus drivers, train operators and watchmen are inadequate. There were only symbolic barriers (visual and acoustic signals) triggered manually by watchman upon train operator radio communication. The fragility of the barrier system associated to poor lighting and short time to trigger the signaling seem to play a critical role in the event. Contrary to the official report which resulted in guilt of the bus driver, the conclusion of the paper emphasizes the fragility of the safety system and the need of level crossing reproject. 相似文献
1