The accident history of a crossing is assumed to be a Poisson process, with its parameter a linear function of certain predictor variables. This parameter, the hazard index, is formed by solving maximum likelihood normal equations using an iterative process. Test procedures are given for the ...
cindex = makeMeasure(id = "cindex", minimize = FALSE, best = 1, worst = 0, properties = c("surv", "req.pred", "req.truth"), name = "Harrell's Concordance index", note = "Fraction of all pairs of subjects whose predicted survival times are correctly ordered among all subjects th...
The Dow Fire and Explosion Index (F&EI) is universally used in evaluating the hazard category of a process plant, area of exposure, expected losses in case of fire and explosion, etc. In the current procedure, the effects of the loss control measures (LCMs) on the F&EI value are not ...
Hypoxia is an important natural hazard threatening the health and economic development of the QTP’s population (Zhang et al., 2018). Against the background of global warming, the oxygen concentration in the global atmosphere has significantly declined by 4 ppm per year (1 ppm=1 μL...
val maxMinutelyIndex = minOf(currentMinutelyIndex + 8, minutelyFifteen.time.size - 1) val precipitationMinutely = minutelyFifteen.precipitation?.slice(currentMinutelyIndex until maxMinutelyIndex) //val precipitationProbabilityMinutely = minutelyFifteen.precipitationProbability?.slice(currentMinutelyIndex until ...
Anon I would not change the stair riser height - that's a trip hazard. Rather you'd want to make an intermediate landing. That seems to me the only choice if you've already built a portion of the stairway. Better would have been an original calculation of the total number of steps an...
These trends make it all more necessary for South Africa to initiate the development and implementation of the national Disaster Hazard and Vulnerability Atlas. This is a database-driven, web-enabled interactive 'virtual book'. It consists of various 'chapters', such as drought, flood, cyclones,...
The analysis allows the assessment of the hazard index, which could be used in decisionmaking processes. A case study is presented to analyse roadsides of a 995 km long road network, using the cost-benefit analysis, and to prioritize possible rehabilitation work. The results highlighted that it...
In the ACEE calculation, the index data of its input elements exhibit the characteristics of high dimensionality, uncertainty, and noise (Han et al., 2021). Therefore, more sample data are needed to increase the model calculation efficiency; if the input factor indicators are not reasonably ...
A modeling approach to account for toxicokinetic interactions in the calculation of biological hazard index for chemical mixtures. Toxicol Lett 1999 ; 108 : 303-8.Haddad S, Tardif R, Viau C, Krishnan K (1999)A modeling approach to account for toxicokinetic interactions in the calculation of ...