991 resultados para 344.04
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A description is presented of a time-marking calculation of the unsteady flow generated by the interaction of upstream wakes with a moving blade row. The inviscid equations of motion are solved using a finite volume technique. Wake dissipation is modeled using an artificial viscosity. Predictions are presented for the rotor mid-span section of an axial turbine. Reasonable agreement is found between the predicted and measured unsteady blade surface static pressures and velocities. These and other results confirm that simple theories can be used to explain the phenomena of rotor-stator wake interactions.
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浮桥河水库浮游植物水柱日生产量变幅为0.34-4.99 g/(m~2-d),最低值出现在下游冬季,最高值出现在中游秋季,年平均值2.75 g/(m~2·d).季节变化:秋季>夏季>春季>冬季,与浮游植物叶绿素a含量和生物量的季节变化一致;水平分布:中游略高于上游,下游最低,与浮游植物叶绿素a含量的水平分布完全一致.表层日生产量占水柱日生产量53.81%.与1980年同期相比,浮游植物初级生产力增加了1.2倍.分析表明,磷含量增加是浮游植物初级生产力提高的关键因子.应用能量收支法估算浮桥河水库鲢鳙渔产潜力为
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新型多功能蔬菜育苗母剂多功能蔬菜育苗母剂是中国科学院沈阳应用生态研究所最新科研成果,并获国家发明专利,现已被列入辽宁省“九五”期间重点推广计划项目,几年来在全国各地应用效果明显,深受广大菜农欢迎。多功能蔬菜育苗母剂可为菜苗提供全面合理的营养,促进苗齐...
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本文介绍MAK-04型粘弹分析仪的测试方法和实验条件的选择方法,举例说明温度、扫描频率、振幅等条件对测试结果的影响。只有合理地选择测试方法和实验条件,才能得到满意的实验结果。
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依据仪器原理和实验条件的限定,介绍了MAK—04粘弹分析仪在复合材料动态力学性能方面的应用。针对各种含不同聚合物的复合材料的特点进行分析测试,得出理想的分折数据。
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2006
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2009
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Breast region measurements are important for research, but they may also become significant in the legal field as a quantitative tool for preoperative and postoperative evaluation. Direct anthropometric measurements can be taken in clinical practice. the aim of this study was to compare direct breast anthropometric measurements taken with a tape measure and a compass.Forty women, aged 18-60 years, were evaluated. They had 14 anatomical landmarks marked on the breast region and arms. the union of these points formed eight linear segments and one angle for each side of the body. the volunteers were evaluated by direct anthropometry in a standardized way, using a tape measure and a compass.Differences were found between the tape measure and the compass measurements for all segments analyzed (p > 0.05).Measurements obtained by tape measure and compass are not identical. Therefore, once the measurement tool is chosen, it should be used for the pre- and postoperative measurements in a standardized way.This journal requires that authors assign a level of evidence to each article. for a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.
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17 fotografías, dieciséis en tono de grises.
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Two page letter from Daniel D. Whedon to V.V. Haynes. Dated March 2, 1878.
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According to the diversity principle, diverse evidence is strong evidence. There has been considerable evidence that people respect this principle in inductive reasoning. However, exceptions may be particularly informative. Medin, Coley, Storms, and Hayes (2003) introduced a relevance theory of inductive reasoning and used this theory to predict exceptions, including the nondiversity-by-property-reinforcement effect. A new experiment in which this phenomenon was investigated is reported here. Subjects made inductive strength judgments and similarity judgments for stimuli from Medin et al. (2003). The inductive strength judgments showed the same pattern as that in Medin et al. (2003); however, the similarity judgments suggested that the pattern should be interpreted as a diversity effect, rather than as a nondiversity effect. It is concluded that the evidence regarding the predicted nondiversity-by-property-reinforcement effect does not give distinctive support for relevance theory, although this theory does address other results.