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migration
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     On F-K migration
     论F-K偏移
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     Kakka and Migration
     客家与移民
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     (4)The separation and migration of cobalt.
     钴的分离与迁移。
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     3) Synchronized Process Migration.
     3)同步进程迁移。
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  migration
PHENYLPYRUVIC ACID DERIVATIVES AS ENZYME INHIBITORS: THERAPEUTIC POTENTIAL ON MACROPHAGE MIGRATION INHIBITORY FACTOR
      
Moreover, we suppose that migration is not allowed.
      
Relative standard deviations of the relative migration times of DNA segments were >amp;lt;3.6%.
      
A highly cross-linked structure was formed in both the cores and the shells by using a cross-linking agent, which could prevent the migration of hydrophobic PS shells to the inside of particles.
      
By compensating the range migration in wideband airborne mechanic scanning radar, the proposed DBS imaging algorithm can efficiently improve the resolution of a DBS image.
      
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Creep under very small torsional stress has been investigated for 99.95% polycrystalline iron in the temperature range of 350°-525℃. The general features of the creep curves obtained are essentially the same as those previously reported for 99.991% aluminum. The creep is shown to be consisted of two parts, one occurring at lower temperatures or shorter times and the other at higher temperatures or longer times. The first part of the creep is limited in extent and is associated with the viscous behavior of grain...

Creep under very small torsional stress has been investigated for 99.95% polycrystalline iron in the temperature range of 350°-525℃. The general features of the creep curves obtained are essentially the same as those previously reported for 99.991% aluminum. The creep is shown to be consisted of two parts, one occurring at lower temperatures or shorter times and the other at higher temperatures or longer times. The first part of the creep is limited in extent and is associated with the viscous behavior of grain boundaries. The activation energy for this grain-boundary creep is 78,000 ± 4,000 calories per mole according to the present creep and stress relaxation measurements. This value is close to the activation energy for self-diffusion of iron, a correlation which indicates that, in so far as to the mechanism of atomic migration is concerned, grain boundaries may not be very different from the interior of the grains.

用99.95%的多晶纯铁作了从350°-525℃的扭转微蠕变及应力弛豫试验,所得结果的概貌与以前用多晶纯铝所得的基本上相同。从蠕变曲线上可以看出这蠕变是由两部分组成的:第一部分是在较低温度或较短时间内发生的,第二部分是在较高温度或较长时间内发生的。第一部分的蠕变是有限的,是由于晶粒间界的粘滞性滑移所引起。根据微蠕变及应力弛豫测量的结果,这一部分蠕变所包含的激活能是78,000±4,000卡/克分子。这个激活能(晶粒间界滑移激活能)的数值与纯铁自扩散的激活能很相近,表示晶粒间界与晶粒内部对于原子迁移的基本过程而言并没有显著的差异。 加碳于纯铁中对于这两部分的蠕变都有显著的影响。最值得注意的结果是含碳量少到0.0004%时已经使晶粒间界的粘滞性滑移受到显著的阻碍。这些发现在控制金属高温蠕变的问题上指出一个一般性的原则,对于以前所提出来的晶粒间界空穴模型也提供了一些新的实验证据。 根据加碳的实验结果,对于第二部分高温蠕变的机构也提出了一个初步的看法,这蠕变所包括的基本过程可能是晶粒内部的空穴中的原子重新排列。

It is suggested that during the nucleation and growth process of the ordering of migration of vacancy in the crystal lattice plays an important role. It is due to the presence of vacancy that an atom occupying a wrong site may shift to a right site. The rate of nucleation based on this mechanism has been calculated. It decreases exponentially with time. It has also been estimated that the number of embryos per unit volume, so does the number of nuclei per unit volume is very large. Hence a nucleus grows...

It is suggested that during the nucleation and growth process of the ordering of migration of vacancy in the crystal lattice plays an important role. It is due to the presence of vacancy that an atom occupying a wrong site may shift to a right site. The rate of nucleation based on this mechanism has been calculated. It decreases exponentially with time. It has also been estimated that the number of embryos per unit volume, so does the number of nuclei per unit volume is very large. Hence a nucleus grows with constant velocity only for a short interval of time. During most of time it does not grow much. As a consequence of this, the isothermal transformation curve will not be a conventional third order or fourth order time exponential curve.

本文中我们提出AuCu_3中有序化转变的机构。在有序化成核成长的过程中,我们认为孔穴起主要作用。坐错的原子依靠和孔穴换位才可以坐到对的座位上。根据这样的机构我们得出有序核的成核率。证明成核率随时间依指数下降的关系改变的。同时我们也估计了作为有序核的中心数,结果表示这种中心数是很大的,平均200个原子中就可以有一个中心。中心密度既然这样大,所以有序核以恒速长大的时间不会太长的。在计算恒温转变曲线时就不能把成长时率当做是常数。这使恒温转变曲线与时间不作3次或4次方的指数关系。 直接利用X光衍射的超点阵线的强度,我们定出恒温转变曲线。结果表示恒温转变曲线接近1次方的指数关系。

Thewoolly aphis, is one of the major insect pests of the apple in Eastern Shan-tung. Serious damage caused by the attack of the aerial form of this insect in neg-lected orchards, often caused death to the apple trees. According to observations made in Tsingtao, the woolly aphis reproduced anaverage of 8-9 generations, with a maximum of 17 generations per year. Winteris spent mainly by the 1st and the 2nd instar nymphs, hibernating in the woundsand crevices of the apple tree. Overwintering nymphs nd apterous...

Thewoolly aphis, is one of the major insect pests of the apple in Eastern Shan-tung. Serious damage caused by the attack of the aerial form of this insect in neg-lected orchards, often caused death to the apple trees. According to observations made in Tsingtao, the woolly aphis reproduced anaverage of 8-9 generations, with a maximum of 17 generations per year. Winteris spent mainly by the 1st and the 2nd instar nymphs, hibernating in the woundsand crevices of the apple tree. Overwintering nymphs nd apterous agamic femaleswere also found at the base of the trunk just below soil level, and on suckers thathad been allowed to grow around the tree, but the damage caused by the root formof this insect is negligible. By the end of April to early May (average temperature 11.0-14.3℃) newly-born nymphy were seen to crawl to the base of the young growing shoots. Thepeak of migration being in June and the early part of July, where an average ofonly 8.2 days is needed to complete a cycle. Each female may then give forth toan average of 94.2 nymphs parthenogenetically. Two gererations of winged agamic females were recorded during the wholelife history. The summer form, though not often seen, occured from May 20 to June23, these gave birth to apterous agamic females and sexuales. Towards the latterpart of August, a brood of fall winged migrants are developed. Their number in-creased as the colonies grow, reaching an average of 23.1-46.4% of winged indivi-duals per colony by September 18 to October 18. The fall migrants gave birth onlyto wingless and mouthless true males and females. After pairing, only a singlefertilized egg was laid by the female. Due to the high mortality of these sexuales,no eggs as yet was found overwintering on the apple tree. Eggs obtained in labora- tory conditions and hundreds of adult sexuales transplanted in October to previous-ly sterlized wounds on the branches of the apple tree, also failed to hatch in thefollowing year, though further works are still being needed to ascertain this fact. Early instar nymphs were also found to infest the calyx of the fruit, thoughnone of them could live up to the adult stage. According to a preliminary test on20 infested apples stored under room temperature from September to October, nonymphs were found to be alive in the calyx after 50 days storage. Studies madeon the time of calyx infestation are in accordance with those of migration. The natural enemies of the woolly aphis are in the order of their importance:a minute chalcid parasite (Aphelinus mali Hald.), the larva of a Chrysopa sp., ladybird beetles and a syrphus maggot. These played an important part in the sup-pressing of this pest in some months of the year. Based on these facts and on the lifehistory of the woolly aphis, an effective spray program has been devised in the controlof Eriosoma. These include a resin wash solution to be diluted with 20 parts ofwater plus 0.02%γ wettable BHC or 5%-6% tar distillate, to be applied in the dor-mant stage; followed by two successive sprays of 0.02-γ-0.03%γ BHC during theearly period of migration, about May 15 and June 10. At the above concentrationand time of usage, BHC proved to have no deleterious effect on the apple.

1.苹果绵蚜在青岛地区1年中最高繁殖代数为17代,平均8—9代。 2.绵蚜1年中繁殖率从6月中旬至7月中旬(22—25℃)为最高,当平均气温连续多日高达26℃以上时其繁殖率显著下降。生长季节一般低温对绵蚜总繁殖率影响不大。 3.夏季有翅蚜发生时期为5月下旬至6月下旬,为数较少,出现时期也很零散,可胎生无翅胎生绵蚜与雌雄性蚜。秋季有翅蚜自8月底开始发生,盛期在9月中旬至10月中旬,10月中旬以后即极少发生,其后代为雌雄性蚜。 4.有翅蚜无口吻,约于7—9日内脱皮4次即行交尾,雌蚜仅产卵1粒,未经交配者不产卵。性蚜自然死亡率很高(平均81.2%),在田间尚未发现有越冬卵。 5.棉蚜主要越冬场所均在其原寄生部位,如伤口、裂缝内与根部不定芽上。越冬虫态以Ⅰ、Ⅱ龄绵蚜为主。 6.绵蚜之迁移以Ⅰ龄若虫为主,5月下旬至7月中旬为主要迁移为害时期。 7.绵蚜可在苹果的萼洼内寄生为害。 8.除西洋苹果、山荆子、花红与海棠外,尚未发现绵蚜有其他寄主。 9.20倍松脂合剂加0.02%γ可湿性666或5%—6%蒽油乳剂,为防治越冬绵蚜的有效药剂。生长季节可用666乳剂或可湿性666防治。 10.666酸霉味对果实品质能引起不良影响,...

1.苹果绵蚜在青岛地区1年中最高繁殖代数为17代,平均8—9代。 2.绵蚜1年中繁殖率从6月中旬至7月中旬(22—25℃)为最高,当平均气温连续多日高达26℃以上时其繁殖率显著下降。生长季节一般低温对绵蚜总繁殖率影响不大。 3.夏季有翅蚜发生时期为5月下旬至6月下旬,为数较少,出现时期也很零散,可胎生无翅胎生绵蚜与雌雄性蚜。秋季有翅蚜自8月底开始发生,盛期在9月中旬至10月中旬,10月中旬以后即极少发生,其后代为雌雄性蚜。 4.有翅蚜无口吻,约于7—9日内脱皮4次即行交尾,雌蚜仅产卵1粒,未经交配者不产卵。性蚜自然死亡率很高(平均81.2%),在田间尚未发现有越冬卵。 5.棉蚜主要越冬场所均在其原寄生部位,如伤口、裂缝内与根部不定芽上。越冬虫态以Ⅰ、Ⅱ龄绵蚜为主。 6.绵蚜之迁移以Ⅰ龄若虫为主,5月下旬至7月中旬为主要迁移为害时期。 7.绵蚜可在苹果的萼洼内寄生为害。 8.除西洋苹果、山荆子、花红与海棠外,尚未发现绵蚜有其他寄主。 9.20倍松脂合剂加0.02%γ可湿性666或5%—6%蒽油乳剂,为防治越冬绵蚜的有效药剂。生长季节可用666乳剂或可湿性666防治。 10.666酸霉味对果实品质能引起不良影响,经初步试验其施用时期最晚不应迟于采收前1个半月至2个月。

 
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