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nd
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  nd
     High Repetition-rates Nd:YAG Laser of Ce-doped Xenon tube pump
     掺铈氙灯泵浦的高重复频率Nd∶YAG激光器
短句来源
     Short-pulsed Nd:YAG laser microsurgery of the eye:biophysical considerations
     短脉冲Nd∶YAG激光对眼睛微外科手术的生理效应
短句来源
     The Physical Design of the Paramters of the Nd:YAG Disk Laser
     Nd∶YAG片状激光器的物理参数设计
短句来源
     Q-switched Nd:YAG Laser Iridotomy
     Q-开关Nd∶YAG 激光虹膜切除术
短句来源
     ND:YAG LASER TREATMENT COMPLICATIONS OF AFTER-CATARACT
     Nd∶YAG激光治疗后发性白内障的并发症
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  nd doped
     Growth of Diode pumped Crystals of 4% Nd Doped YAG by the Flux Method
     熔盐法生长Nd∶YAG晶体
短句来源
     GROWTH OF Nd DOPED NaBi(WO_4)_2 CRYSTAL
     Nd∶NaBi(WO_4)_2晶体生长
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     The laser characteristics comparative experiments of highly doped Nd∶YAG and Nd∶YVO 4 crystals pumped by a Ti∶sapphire laser were demonstrated. The mole fractions of concentration of Nd doped YAG crystals were 0.020 and 0.025, and the laser slope efficiency was 29.7% and 32% respectively.
     进行了钛宝石激光抽运高掺杂浓度Nd∶YAG和Nd∶YVO4 晶体的激光性能对比实验 ,所用Nd∶YAG晶体摩尔分数为 0 0 2 0和 0 0 2 5 ,激光斜率效率分别为 2 9 7%和 32 % ;
短句来源
     The mole fraction of concentraction of Nd doped YVO 4 was 0.030, and its laser slope efficiency was 34.7%. It suggested that high doped Nd∶YAG crystal was comparable in laser characteristics to high doped Nd∶YVO 4 crystal.
     Nd∶YVO4 晶体摩尔分数为 0 0 30 ,激光斜率效率为 34 7% ,表明了高浓度Nd∶YAG晶体在激光性能上与高浓度的Nd∶YVO4 晶体相当
短句来源
     Preparation of Nd doped YAG nano-sized powders by co-precipitation method and synthesis mechanics
     共沉淀法制备Nd∶YAG纳米粉体与机理探讨
短句来源
  “nd∶”译为未确定词的双语例句
     Optical Characterization of α-Nd∶Ba_3Y(BO_3)_3 Crystal
     新型激光晶体α-Nd∶Ba_3Y(BO_3)_3光谱性能研究
短句来源
     The output power of 13.17W,13.26W and 8.43W is obtained inspectively using the three crystals of 1mm length in 25W pumping power,and the optimal transmission rate inspectively is 24%,44% and 16%.
     在25W泵浦功率下,利用1mm长的Nd∶GdVO4,Nd∶YVO4和Nd∶YAG晶体可分别得到13.17W,13.26W和8.43W的输出功率,相应的输出镜最佳透过率分别为24%,44%和16%。
短句来源
     Application of ~(127)I_2 Doppler-broadened FM Spectroscopy to Frequency Stabilization of Mini-Nd∶YVO_4 Laser
     ~(127)I_2频率调制光谱在微型Nd∶YVO_4激光稳频中的应用
短句来源
     Laser Welding of 8 mm Thick Stainless Steel Plates
     8mm厚不锈钢板的Nd∶YAG激光焊接
短句来源
     KTP-Nd∶YAG laser uniting drug poured into for obstruction of various lacrimal ducts
     KTP-Nd∶YAG激光联合药物灌注治疗各种泪道阻塞
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  nd
They were confirmed to be as LnL2(NO3)·4H2O (Ln=La, Pr, Nd, Sm, Y) and LnL2(NO3)·3H2O (Ln=Gd, Tb, Dy, Er, Yb), respectively.
      
The rare earth Schiff base complex Nd (H2Salen)2Cl3·2C2H5OH was synthesized by a simple and convenient method and characterized by IR and elemental analysis.
      
The catalyst system composed of Nd (H2Salen)2Cl3·2C2H5OH/Al(i-Bu)3/CCl4 is effective for the polymerization of styrene (St).
      
The optimum conditions are as follows: [St]/[Nd] = 1000, [CCl4]/[Nd] = 9, [Al]/[Nd] = 30, and polymerization at 50°C for 20 h.
      
The surface of TC4 titanium alloy welding line by electron beam welding (EBW) was processed by high power Q-switched and repetition-rate Nd: glass laser.
      
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Mental and mandibular foramen of 250 Chinese mandibles were studied. It wasfound that the mental foramina wer located as follows: below apex of the lst premolar--1.2% on the right, 0.4% on the left; between the lst and 2nd premolar--18.8% on theright, 7.6% on the left; below apex of the 2nd premolar--74.4% on the right,82.4% on the left; between the 2nd premolar and lst molar--5.6% on the right,8.8% on the left; below apex of the lst molar--none on the right, 0.8% on the left. Theaverage distance...

Mental and mandibular foramen of 250 Chinese mandibles were studied. It wasfound that the mental foramina wer located as follows: below apex of the lst premolar--1.2% on the right, 0.4% on the left; between the lst and 2nd premolar--18.8% on theright, 7.6% on the left; below apex of the 2nd premolar--74.4% on the right,82.4% on the left; between the 2nd premolar and lst molar--5.6% on the right,8.8% on the left; below apex of the lst molar--none on the right, 0.8% on the left. Theaverage distance of the anterior margin of the foramen to the mental symphysis was26.5 mm. on the right, 26.8 mm. on the left; to the posterior border of the ramus, 70.0 mm.on the right, 69.0 mm. on the left; to the alveolar border, 15.5 mm. on the right, 15.2 mm.on the left; to the basal margin, 15.6 mm. on the right, 15.5 mm. on the left.With regard to the occurrence of the multiple mental foramina, it was found tobe 1.2% on the left 1.8% on the right, and 0.4% on both sides simultaneously. Theapproximate position of the mandibular foramen was slightly higher than the midpointof the ramus and is a little to the posterior border of the ramus. The average distanceof the lowest margin of the foramen to the mandibular notch was 22.5 mm. on the right,25.1 mm. on the left; to the basal margin, 25.5 mm. on the right, 27.6 mm. on the left;to the posterior border, 15.8 mm. on both sides; to the anterior border, 20.0 mm. on theright, 20.6 mm. on the left. Various observations on this subject by other authors wereintroduced and discussed.

观察250个中国人颏孔及下颌孔的位置所得到的结果如下:1.78.4%的颏孔是在第2前臼齿的下方。2.多颏孔以下颌骨数计算有5.2%,以侧计算有2.8%。3.颏孔大致是在下颌体长的前1/4的地点,下颌体高的中间。4.下颌孔大致是在下颌支高的中央,稍靠後缘。

European corn borer is cosmoplitan in distribution. It causes a considerable damage in Cheking province, especially in mountainous regions where corn being grown as a main crop. The present paper deals with the biological investigation of the corn borer and its proper control measures aganist the pest. The biological studies and field experiments were conducted at Chekiang Agricultural college, Hanchow during the year 1954-1955. The general morphology of the insect is well studied. The setal arrangement of the...

European corn borer is cosmoplitan in distribution. It causes a considerable damage in Cheking province, especially in mountainous regions where corn being grown as a main crop. The present paper deals with the biological investigation of the corn borer and its proper control measures aganist the pest. The biological studies and field experiments were conducted at Chekiang Agricultural college, Hanchow during the year 1954-1955. The general morphology of the insect is well studied. The setal arrangement of the different instars of the larvae is illustrated in plates. This insect has four gerenations annually at Hanchow and overwinters in larval stage. The adults emerge at late May or early June. The females deposite their egg masses on the underside, and along the mid-rib of the leaf. There are about 48 eggs of a simple egg mass in average. The eggs mostly hatch at 9-11 a.m. and after hatching young larvae feed to some extent on the leaves, but soon bore into the leaf stems, the stalks, or the ears of the corn plants. The larvae move from one plant to another at their first three instars. The concentrated spray of 1% wettable DDT and 0.125% of wettable 666 suspension applied at a rate of 100 catties per mow in the 1st spray and 150 catties per mow in the 2nd spray, shows quite promising. The experiment of planting date of corn in relation to the infestation of European corn borer, shows that the most suitable date for planting corn is in the middle of July, in which infestation is lighter. The lighter infestation of late planting of corn is mainly due to the egg masses of European corn borer being heavily parasitized by Trichogramma evenescens Westw. since middle of July.

1.本試驗于1954—1955年在杭州華家池浙江農学院農場進行。2.玉米螟一般形态作了簡單的記述。幼虫各分期形态的記載可供作区別令期的資料。3.玉米螟在杭州地区一年發生四代,以老熟幼虫在玉米稈越冬,越冬死亡率在5月中旬为最高达27.27%,成虫都在晚上活动,產卵在玉米叶背面主脈附近,离叶尖20—30厘米处最多,幼虫孵化在上午9—11时左右。4.春玉米可用1%可湿性DDT乳剂和0.125%r可湿性六六六噴射。第一次每畝用100市斤,第二次每畝用150市斤。在螟蛾盛發期施用效果顯著。5.玉米播种試驗說明在7月中旬播种的螟災比較輕,主要原因是由于7中旬以后玉米螟卵塊赤眼蜂的寄生率提高至97%以上。

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...

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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