Margin analysis

Wilf P (1997) When are leaves good thermometers A new case for leaf margin analysis. Paleobiology 23 373-... 

The margin analysis based on the experimental results in Table 2 suggests that the most important factor investigated is the agitation speed N and the second most important is the Vq/ w r ho, as far as the maximum initial reaction rate, normaljiso aldehyde ratio and conversion are concerned (Table 3). The effect of surfactant concentration was the least important in the selected range of reaction... 

Tables Results of marginal analysis of orthogonal tests [16].

In order to facihtate the understanding of the approach, two examples are provided to illustrate the main steps of the structural safety study. It will present how relevant parameters can be identified by means of theoretical approach hke FMECA, safety margin analysis, failure probabUity etc. These relevant parameters, say the drivers of the structural safely, will be taken into account and monitored in the manufacturing process through inspechons, control, and recording. This will enable to ensure that these parameters wiU not be missed with a probability equivalent to the safety and/or rehabihty target specified in the theoretical requirements. 

For example. Bodily and Weatherford (1995) present a generic multiple-class PARM allocation problem. They first study a simplified two-class problem without diversion. The problem assumes that there are two demand classes, full-price and discount, sharing a fixed available capacity of qo units, and that no full-price customers would pay less than their willingness to pay (i.e. the full price i o)- The purpose is to determine how many units (denoted by a decision variable qi) should be allocated to discount-price customers, paying discount price i i, before the number of full-price customers (denoted by a random number X) is realized. Through a newsboy-type marginal analysis, the authors derive the decision rule increase discount share from q to 1 if ... 

For tackling this challenge, the method based on marginal analysis can indicate true steam costs at point of use. The reason why the marginal price method (Chapter 17) can provide the true steam cost is that it is based on the last incremental amount of steam saved or generated. Determination of marginal steam prices relies on an overall steam and power balance model, which takes into account the effects from steam balances. 

Seismic margin analysis has been carried out for APIOOO safety-significant SSCs that provides assurance of seismic withstand beyond the UK Design Basis. 

From this margin analysis, it is clear that the amount of DEE produced should be optimized, because making ethylene is far less profitable. In addition, the maximum amount of DEE that the market can support is not currendy being produced. Therefore, supplementing the feed with ethanol should be considered. 

KENNEDY, R.P., Overview of Methods for Seismic PRA and Margin Analysis including Recent Innovations, Rep. EPRI261577, EPRI, Palo Alto, CA (1977). 

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