After four decades, the Standing-Katz Z-factor chart is still widely used as a practical source for obtaining natural gas compressibility factors. The chart is based on experimental data on gas mixtures at pr...
Hall and Yarborough’s correlation is a modification of the hard sphere Carnahan–Starling equation of state, with constants developed through regression, and 1500 data points extracted from Standing and Katz’s original z-factor chart, as shown in Fig.2. z=A1Ppry, (7) whereyis the root o...
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、 我想对geom_boxplot做一些修改:aa <- as.factor(aa)per <- trunc(per)z$ch <- NAz[ 浏览2提问于2011-12-12得票数 1 回答已采纳 1回答 R-图Y,X在范畴Z上,有些类别是点,另一些是线。 、、、 在类别Z上的Y和X图中,我希望类别用不同的collor点来表示,除了一个类别,我希望显示为连接这些点...
bar chart 条形图 beta-distribution 贝塔分布 between groups 组间的 bias 偏倚 binomial distribution 二项分布 binomial test 二项检验 C组32个 calculate 计算 case 个案 category 类别 center of gravity 重心 central tendency 中心趋势 chi-square distribution 卡方分布 ...
In such cases, use of the Standing-Katz Z-factor chart, or its tabulated form, is generally accepted. This article evaluates eight methods that have been devised to make the original Standing-Katz chart of supercompressibility, or Z-factor, readily usable in complex calculations. A chart and ...
Some of the following z-table methods allow you to use a test statistic from a z-test to find thep-value. The procedure for using z-tables to find p-values depends on whether you’re using a one- or two-tailed test. For one-tailed tests, the directionality is also afactor. In the...
Candlestick chart 阴阳烛图表 日本传统使用的图表方法,最早用于稻米期货市场。个别表示价格的条状看似一根两端露出烛芯的蜡烛。蜡烛本身代表从开市到收市的价格差异,烛芯代表最高和最低位,而蜡烛颜色则显示收盘价比开盘价高开还是低开。一般是白色或绿色代表有较高的收盘价,红色...
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bar chart 条形图 beta-distribution 贝塔分布 between groups 组间的 bias 偏倚 binomial distribution 二项分布 binomial test 二项检验 C组32个 calculate 计算 case 个案 category 类别 center of gravity 重心 central tendency 中心趋势 chi-square distribution 卡方分布 ...