نتایج جستجو برای: growth chart
تعداد نتایج: 843667 فیلتر نتایج به سال:
introduction: low birth weight (lbw, birth weight<2500g) is a significant health problem in children all around the world. there is a direct relationship between low birth weight and infant mortality rate. one of the most important measures to prevent childhood morbidity is growth monitoring. the present study was planned to compare the growth rate of lbw neonates with those weighing 2500g and ...
introduction junk food, due to the lack of vitamins, minerals and trace amounts of energy and protein, there is the risk that the child's stomach filled and by reducing her/his appetite, reduce the chance of nutritious foods. so it is necessary to determine the relationship between using of junk food with growth rate in children. materials and methods this cross-sectional descriptive-analy...
Two key measures of U.S. economic growth—the annual rate of change in real output and in productivity—have improved considerably in recent years.1 Between 1996 and 1998, growth in productivity in the largest segment of the economy, the private nonfarm business sector, averaged nearly 2 percent. This growth rate, the strongest sustained pace since 1983-85, appears to signal some fundamental impr...
Quality control plays an important role in increasing the product quality. Fuzzy control charts are more sensitive than Shewhart control chart. Hence, the correct use of fuzzy control chart leads to producing better-quality products. This area is complex because it involves a large scope of industries, and information is not well organized. In this research, we provide a literature review of th...
In some statistical process monitoring applications, quality of a process or product is described by more than one ordinal factors called ordinal multivariate process. To show the relationship between these factors, an ordinal contingency table is used and modeled with ordinal log-linear model. In this paper, a new control charts based on ordinal-normal statistic is developed to monitor the ord...
The performance of an X-bar chart is usually studied under the assumption that the process standard deviation is well estimated and does not change. This is, of course, not always the case in practice and X-bar charts are not robust against errors in estimating the process standard deviation or changing standard deviation. In this paper, the use of an exponentially weighted moving average (EW...
introduction: vitamin deficiency and iron deficiency anemia are common nutritional problems, at least in children under 5. these materials shortage, especially in the first two years of life, impair physical and brain growth, reduces the child's learning ability, reduces body resistance against infections, behavioral changes, apathy and finally social and economic adverse consequences woul...
In many quality control applications, the necessary distributional assumptions to correctly apply the traditional parametric control charts are either not met or there is simply not enough information or evidence to verify the assumptions. It is well known that performance of many parametric control charts can be seriously degraded in situations like this. Thus, control charts that do not requi...
In statistical process control, the primary method used to monitor the number of nonconformities is the c-chart. The conventional c-chart is based on the assumption that the occurrence of nonconformities in samples is well modeled by a Poisson distribution. When the Poisson assumption is not met, the X-chart (individuals chart) is often used as an alternative charting scheme in practice. In thi...
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