In these bicyclic sesquiterpanes,the relative abundance of the rearranged drimane is regularly changed in spatial distribution,which may indicate the characteristics of petroleum migration and accumulation in QHD32-6 oilfield.
该油田双环倍半萜中重排补身烷的相对丰度在纵向上和横向上都表现出有规律的变化,这种规律性的变化可能反映了秦皇岛32-6油田油气运移与聚集的特征。
The 2- stereisoimers of podophyllotoxin and its esters can be identified by calculating the ratio of relative abundance of m/z 168,m/z 396 to molecular ion in EI-MS.
用EI-MS对鬼臼、苦鬼臼及它们的8个羧酸酯进行研究,发现通过比较图谱中的m/z 168,m/z 396和各自分子离子峰相对丰度的比值,可以区分鬼臼及其羧酸酯类2位立体异构体。
The relative abundance of phytophages,predators,parasi.
植食类、捕食类、寄生类和其它类的相对丰富度分别为78。
Seasonal dynamics of the relative abundance of arthropod communities in peach orchards;
桃园节肢动物群落相对丰盛度的季节动态研究
The results show that there are obvious differences in relative abundance of fish resources between different reefs surveyed with respect to the three fishing methods, the highest relative abundance of fish resources for gillnetting being in .
结果表明,7座珊瑚礁水域不同作业方式的鱼类资源相对丰盛度差别较大,其中刺网以永暑礁最高,手钓以华阳礁最高,延绳钓以南薰礁最高;同时,刺网和手钓不同水深区域鱼类资源的相对丰盛度也不相同,其中刺网以11～30m区域最高,手钓以10m以浅和51～80m区域较高;分析认为,造成礁区之间鱼类相对丰盛度差异的主要原因不是初级生产力,而是生态环境因素,主要是礁盘形态和大型海藻的数量。
Study on the relative abundance of arthropod community of Tall Fescue Turf in Spring was conducted from April to May,2008.
在2008年4—5月份对春季高羊茅草坪节肢动物群落的相对丰盛度进行了研究,通过对调查数据整理和分析得出高羊茅草坪节肢动物群落总群落及其各亚群落相对丰盛度的动态变化,此研究成果可为草坪害虫的综合防治提供科学的理论依据。
A Study on Evaluation of Relative Strength for Different Polymer Gels Used at Oil Fields;
油田用聚合物凝胶相对强度表征方法研究
The early-age relative strength-simplify maturity equation was concluded from this research and the relative strength when simplified maturity reached 600d was discussed.
本文基于简化成熟度理论,试验研究了粉煤灰混凝土在模拟同条件养护下的早期相对强度发展情况,得出了其早期相对强度预测公式,并按照《混凝土结构工程施工质量验收规范》(GB50204-2002)的相关要求,对该类混凝土等效养护龄期及同条件养护至600℃。
Based on the preliminary researches on tube clearance, overdistension measure, total distension measure, weld relative strength, destructive pressure test in producing copperaluminum combined columnwingtype radiator, discusses crucial skills to improve the technical and provides the basis for manufacture and standardization of the radiator.
通过对铜铝复合柱翼型散热器生产加工中的穿管间隙、过盈胀管量、总胀管量、焊接相对强度、破坏压力试验等方面的初步研究 ,探讨了改进工艺的关键技术 ,为此种散热器的推广生产和标准制订提供了依据。
Detection of Firmicutes and Bacteroidetes in the Pig Gut and the Correlation between Their Abundance and Fat Deposit
猪肠道硬壁菌门和拟杆菌门数量的检测及其相对丰度与脂肪沉积的相关性研究
relative isotope abundance determination
相对同位素丰度测量
The relative abundance ofphytophages and predators were 97.6% and 2.85% respectively.
植食类的相对丰盛度为96.7%,捕食类相对丰盛度为2.85%。
absolute isotopic abundance measurement
绝对同位素丰度测量
Because U-235 has a relatively short half-life, it is scarce today in relation to the abundant U-238.
因为U235的半衰期较短，相对于U238的丰度来说，现代的U235是稀少的。
Study on Relative Abundance of Arthropod Community of Tall Fescue Turf in Spring--A Case of Tall Fescue Turf;
春季草坪节肢动物群落相对丰盛度研究——以高羊茅草坪为例
Research on Relationship between Resource Abundance and Regional Economy Development in China:Based on Resource Curse Theory;
中国区域经济与资源丰度相关性研究
In northern feeding ground, community indices as diversity, homogeneity, abundance and simplicity were higher, and in southern feeding ground, they are to the contrary.
北部渔场群落多样度、均匀度、丰富度、单纯度较高,南部渔场则相反。
The Effects of Parallel Middle Body Length on Resistance of Full Ship Forms
平行中体长度对丰满船型阻力的影响
There is an argument to express them in ground level abundance of the respective elements.
有理由把它们用相应元素的地平丰度来表示。
Species richness was generally low in all shrub communities.
各类灌丛之间物种丰富度指数相差不大。
Species richness and evenness were unrelated to similarity in species composition.
物种丰富度和均匀度均与物种构成上的相似性没有显著相关关系。
After the comparison between abundance and density,on the top list are Zhoushan,Jiaxing and Huzhou.
INFLUENCE OF FOREST FRAGMENTATION ON THE WINTER MAMMALS′ ABUNDANCE IN A TEMPERATE FOREST
温带林的片断化对冬季兽类丰富度的影响(英文)
The Effect of Mass Accretion on Elemental Abundances of Metal-Poor Extrinsic AGB Stars;
物质吸积对贫金属外赋AGB星元素丰度的影响
The Effect of Superwind Mass Loss on Abundances of Metal-Poor AGB Stars;
星风质量损失对贫金属AGB星表面丰度的影响
Evaluation on Xinjiang Agricultural Resources based on Resources Richness Rate Index;
基于资源丰度指数对新疆农业资源的初步评价
The Influence of metal abundant on structure and evolution model of rotating stars;
金属丰度对转动恒星结构与演化模型的影响