DIN EN 1142-1994 水果和疏菜汁.硫酸盐含量的测定;德文版本EN1142:1994

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【英文标准名称】:Fruitandvegetablejuices-Determinationofsulfatecontent;GermanversionEN1142:1994
【原文标准名称】:水果和疏菜汁.硫酸盐含量的测定;德文版本EN1142:1994
【标准号】:DINEN1142-1994
【标准状态】:现行
【国别】:德国
【发布日期】:1994-12-01
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:含量测定;化学分析和试验;试验;分光光度法;食品;数学计算;硫酸盐;水果汁;蔬菜汁;试验报告;非酒精饮料;饮料;饮料
【英文主题词】:Beverages;Chemicalanalysisandtesting;Determinationofcontent;Drinks;Foodproducts;Fruitjuices;Investigations;Juices(food);Mathematicalcalculations;Non-alcoholicbeverages;Spectrophotometry;Sulfatecontents;Sulphates;Testing;Vegetablejuices
【摘要】:Thedocumentspecifiesamethodforthedeterminationofthesulfatecontentoffruitandvegetablejuices.Thedeterminationismadebyprecipitation.
【中国标准分类号】:X24;X26
【国际标准分类号】:67_160_20
【页数】:5P.;A4
【正文语种】:德语

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上一篇: DIN EN 1141-1994 水果和疏菜汁.脯氨酸含量的光谱测定;德文版本EN1141:1994
下一篇: DIN 7406-1994 双行钮扣

【英文标准名称】:Evaluationoftorquepulsationsduringstartingofsynchronousmotors
【原文标准名称】:同步电动机起动过程中扭矩脉动的评定
【标准号】:IEEE1255-2000
【标准状态】:现行
【国别】:美国
【发布日期】:2000
【实施或试行日期】:
【发布单位】:美国电气电子工程师学会(IEEE)
【起草单位】:IEEE
【标准类型】:()
【标准水平】:()
【中文主题词】:脉动;扭矩;电动机;同步电动机;数学计算;测量;电气工程
【英文主题词】:Electricmotors;Electricalengineering;Mathematicalcalculations;Measurement;Pulsation;Synchronousmotors;Torque
【摘要】:
【中国标准分类号】:K20
【国际标准分类号】:29_160_30
【页数】:32P;A4
【正文语种】:英语

Product Code:SAE AIR1168/11
Title:Spacecraft Boost and Entry Heat Transfer
Issuing Committee:Ac-9 Aircraft Environmental Systems Committee
Scope:The prediction of vehicle temperatures during ascent through the earth驴s atmosphere requires an accurate knowledge of the aerodynamic heating rates occurring at the vehicle surface. Flight parameters required in heating calculations include the local airstream velocity, pressure, and temperature at the boundary layer edge for the vehicle location in question. In addition, thermodynamic and transport air properties are required at these conditions.Both laminar and turbulent boundary layers occur during the boost trajectory. Experience has shown that laminar and turbulent heating are of equivalent importance. Laminar heating predominates in importance in the stagnation areas, but the large afterbody surfaces are most strongly affected by turbulent heating. Once the local flow conditions and corresponding air properties have been obtained, the convective heating rate may be calculated for a particular wall temperature. This assumes that the boundary layer flow regime (that is, turbulent, laminar, or transitory) has also been established, so that a heating theory corresponding to the particular flow conditions may be selected.This section presents theoretical methods for computing boost vehicle surface aerodynamic heating rates. First, procedures are given for computing the local flow distributions around the vehicle. Second, methods are given for computing the convective heating rates, using the flow parameters found previously.