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32% or less, have been evaluated in a full panel of 60 human cancer cell lines over a 5-log dose range at the National Cancer Institute.
      
According to the protocol of the National Cancer Institute (NCI) in vitro disease-oriented human cells screening panel assay, 13 compounds showed promising broad spectrum antitumor activity.
      
Growth Model System for National Continuous Forest Inventory
      
A Growth Model System is developed for data updating and forecasting of the national continuous forest inventory.
      
Using the new method, the roots of phytocommunities in Datong County, Qinghai Province (one of the counties selected for the national CCFG experiment), are dealt with in this paper.
      
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Fineness modulus (F. M.) has served as an index of fineness of aggregates since it was first introduced by Prof. Duff A. Abrams in 1918. In the concrete mix design, the F. M. of sand governs the sand content and hence the proportions of other ingredients. But there are undesirable features in F. M.: it does not represent the grading of sand and manifests no significant physical concept.Prof. suggested an "average diameter" (d_(cp)) in 1943 as a measure of fineness of sand. In 1944, d_(cp) was adopted in 2781-44...

Fineness modulus (F. M.) has served as an index of fineness of aggregates since it was first introduced by Prof. Duff A. Abrams in 1918. In the concrete mix design, the F. M. of sand governs the sand content and hence the proportions of other ingredients. But there are undesirable features in F. M.: it does not represent the grading of sand and manifests no significant physical concept.Prof. suggested an "average diameter" (d_(cp)) in 1943 as a measure of fineness of sand. In 1944, d_(cp) was adopted in 2781-44 as national standard to specify the fine aggregate for concrete in USSR. It was introduced to China in 1952 and soon becomes popular in all technical literatures concerning concrete aggregates and materials of construction.After careful and thorough investigation from ordinary and special gradings of sand, the equation of d_(cp) appears to be not so sound in principle and the value of d_(cp) computed from this equation is not applicable to engineering practice. The assumption that the initial average diameter (ν) of sand grains between consecutive seives is the arithmetical mean of the openings is not in best logic. The value of an average diameter computed from the total number of grains irrespective of their sizes will depend solely on the fines, because the fines are much more in number than the coarses. Grains in the two coarser grades (larger than 1.2 mm or retained on No. 16 seive) comprising about 2/5 of the whole lot are not duly represented and become null and void in d_(cp) equation. This is why the initiator neglected the last two terms of the equation in his own computation. Furthermore, the value of d_(cp) varies irregularly and even inversely while the sands are progressing from fine to coarse (see Fig. 4).As F. M. is still the only practical and yet the simplest index in controlling fineness of sand, this paper attempts to interpret it with a sound physical concept. By analyzing the F. M. equation (2a) in the form of Table 9, it is discovered that the coefficients (1, 2…6) of the separate fractions (the percentages retained between consecutive seives, a1, a2…a6) are not "size factors" as called by Prof. H. T. Gilkey (see p. 93, reference 4), but are "coarseness coefficients" which indicate the number of seives that each separate fraction can retain on them. The more seives the fraction can retain, the coarser is the fraction. So, it is logical to call it a "coarseness coefficient". The product of separate fraction by its corresponding coarseness coefficient will be the "separate coarseness modulus". The sum of all the separate coarseness moduli is the total "coarseness modulus" (M_c).Similarly, if we compute the total modulus from the coefficients based on number of seives that any fraction can pass instead of retain, we shall arrive at the true "fineness modulus" (M_f).By assuming the initial mean diameter (ν') of sand grains between consecutive seives to be the geometrical mean of the openings instead of the arithmetical mean, a "modular diameter" (d_m), measured in mm (or in micron) is derived as a function of M_c (or F. M.) and can be expressed by a rational formula in a very generalized form (see equation 12). This equation is very instructive and can be stated as a definition of mqdular diameter as following:"The modular diameter (d_m) is the product of the geometrical mean ((d_0×d_(-1))~(1/2) next below the finest seive of the series and the seive ratio (R_s) in power of modulus (M_c)." If we convert the exponential equation into a logarithmic equation with inch as unit, we get equation (11) which coincides with the equation for F. M. suggested by Prof. Abrams in 1918.Modular diameter can be solved graphically in the following way: (1) Draw an "equivalent modular curve" of two grades based on M_c (or F. M.) (see Fig. 6). (2) Along the ordinate between the two grades, find its intersecting point with the modular curve. (3) Read the log scale on the ordinate, thus get the value of the required d_m corresponding to M_c (see Fig. 5).As the modular diameter has a linear dimension with a defin

細度模數用為砂的粗細程度的指標,已有三十餘年的歷史;尤其是在混凝土的配合上,砂的細度模數如有變化,含砂率和加水量也要加以相應的調整,才能維持混凝土的稠度(以陷度代表)不變。但是細度模數有兩大缺點,一個是模數的物理意義不明,另一個是模數不能表示出砂的級配來。蘇聯斯克拉姆塔耶夫教授於1943年提出砂的平均粒徑(d_(cp))來,以為砂的細度指標;雖然平均粒徑仍不包含級配的意義,但是有了比較明確的物理意義,並且可以用毫米來度量,這是一種新的發展。不過砂的細度問題還不能由平均粒徑而得到解决,且平均粒徑計算式中的五項,僅首三項有效,1.2和2.5毫米以上的兩級粗砂在計算式中不生作用,以致影響了它的實用效果。本文對於平均粒徑計算式的創立方法加以追尋和推演,發現其基本假設及物理意義,又設例演算,以考察其變化的規律性;認為細度模數還有其一定的實用價值,不能為平均粒徑所代替。至於補救細度模數缺點的方法,本文試由模數本身中去尋找;將模數的計算式加以理論上的補充後,不但能分析出模數的物理意義,並且還發現模數有細度和粗度之別。根據累計篩餘計算出來的F.M.應稱為“粗度模數”,根據通過量計算出來的才是“細度模數”。假定兩隣篩间的顆粒是...

細度模數用為砂的粗細程度的指標,已有三十餘年的歷史;尤其是在混凝土的配合上,砂的細度模數如有變化,含砂率和加水量也要加以相應的調整,才能維持混凝土的稠度(以陷度代表)不變。但是細度模數有兩大缺點,一個是模數的物理意義不明,另一個是模數不能表示出砂的級配來。蘇聯斯克拉姆塔耶夫教授於1943年提出砂的平均粒徑(d_(cp))來,以為砂的細度指標;雖然平均粒徑仍不包含級配的意義,但是有了比較明確的物理意義,並且可以用毫米來度量,這是一種新的發展。不過砂的細度問題還不能由平均粒徑而得到解决,且平均粒徑計算式中的五項,僅首三項有效,1.2和2.5毫米以上的兩級粗砂在計算式中不生作用,以致影響了它的實用效果。本文對於平均粒徑計算式的創立方法加以追尋和推演,發現其基本假設及物理意義,又設例演算,以考察其變化的規律性;認為細度模數還有其一定的實用價值,不能為平均粒徑所代替。至於補救細度模數缺點的方法,本文試由模數本身中去尋找;將模數的計算式加以理論上的補充後,不但能分析出模數的物理意義,並且還發現模數有細度和粗度之別。根據累計篩餘計算出來的F.M.應稱為“粗度模數”,根據通過量計算出來的才是“細度模數”。假定兩隣篩间的顆粒是兩篩篩孔的幾何平均值,以代替數學平均值(即斯氏平均?

Stools of 852 inhabitants in a national farm of Hainan Island were ex- amined and the hookworm eggs were counted. A discussion of the epidemiology on the hookworm disease is made with special reference to the planting of such economic plants as coffee, Agave sisalana, Cymbopogon spp etc. Infection of Strongyloides stercoralis were recorded.

十一、1.所調查的万宁縣的一国营农埸是一新型的集体农莊。有埸員5.000人左右。經营以經济作物(香茅、咖啡、剑麻)为主,其他农作物为付。2,检查埸員658人糞便的结果,鈎蟲感染率77.7%,蛔蟲63.8%,鞭蟲43.9%。3.鈎蟲感染率以男性(81.8%)略高于女性(76.2%),蛔蟲感染率以女性(71.4%)高于男性(57.1%),鞭蟲感染率亦以女性(47.3%)略高于男性(40.9%)。4.所检查658人中全部用陈心陶氏等設計之直接塗片法作蟲卵計算的結果,每人每克糞便平均含蟲卵1,345个,若陰性者除外,則阳性者粪便每克平均含虫卵1,695个,其中以輕度感染者(虫卵数在400-2,999之間)为数最多,占总数49.4%;極輕微感染者,占17.9%;中度感染者占10.6%;嚴重感染者僅占全人数1.2%而已。5.男性鈎蟲感染率雖較女性为高,但男性平均每克粪便含蟲卵数(1,160个)遠較女性(1,550个)为低。就阳性者言,差別更大。男阳性者粪便平均每克含蟲卵1,415个,而女性則为2,035个。6.統計的結果,农業劳动者感染率(92.6%)遠较非农業劳动(70.1%)为高。就感染強度言,农業劳动者每克糞便平均...

十一、1.所調查的万宁縣的一国营农埸是一新型的集体农莊。有埸員5.000人左右。經营以經济作物(香茅、咖啡、剑麻)为主,其他农作物为付。2,检查埸員658人糞便的结果,鈎蟲感染率77.7%,蛔蟲63.8%,鞭蟲43.9%。3.鈎蟲感染率以男性(81.8%)略高于女性(76.2%),蛔蟲感染率以女性(71.4%)高于男性(57.1%),鞭蟲感染率亦以女性(47.3%)略高于男性(40.9%)。4.所检查658人中全部用陈心陶氏等設計之直接塗片法作蟲卵計算的結果,每人每克糞便平均含蟲卵1,345个,若陰性者除外,則阳性者粪便每克平均含虫卵1,695个,其中以輕度感染者(虫卵数在400-2,999之間)为数最多,占总数49.4%;極輕微感染者,占17.9%;中度感染者占10.6%;嚴重感染者僅占全人数1.2%而已。5.男性鈎蟲感染率雖較女性为高,但男性平均每克粪便含蟲卵数(1,160个)遠較女性(1,550个)为低。就阳性者言,差別更大。男阳性者粪便平均每克含蟲卵1,415个,而女性則为2,035个。6.統計的結果,农業劳动者感染率(92.6%)遠较非农業劳动(70.1%)为高。就感染強度言,农業劳动者每克糞便平均含蟲卵1,715个,非农業劳动者是770个,前者为后者的2.2倍。7.就各不同工种分別統計的結果,感染率依次排列是:牧牛(100%),咖啡(96%),飼养(94%),其它农業劳动(胡椒、霍香、蔬菜等,93%),香茅(92%),水田和水浮蓮(91%),劍麻(90%),机动雜工(89%),苗圃(84%)。感染強度依次排列是:咖啡(每克糞便平均含蟲卵2,610个),其它农業劳动(2,420个),牧牛(1,605个),机动雜工(1,580个),飼养(1,560个),香茅(1,480个),劍麻(1,380个),苗圃(1,355个),水田和水浮蓮(1,290个)。同一工种中,女性感染強度皆較男性为高。8.調查188人的血紅素的結果,男性平均达80%,與鈎蟲感染強度无顯著關系。女性血紅素平均72.3%,随鈎蟲感染的強度而降低。一般說來,无論男女,血紅素濃度都是相当高的。这是由於农民生活改善及当地瘧疾基本上被扑灭的緣故。9.在农場范圍內,雜居着少数民族,即所謂“居民点”的居民。經調查194人的糞便的結果,其鈎蟲感染率和感染強度僅畧高於农場居民,其血紅素平均也與农場場員相接近。10.鈎蟲感染因素,主要是由於当地野糞的情形極普遍,各工种中,以咖啡栽培对鈎蟲病的流行關系最大,其次胡椒栽培與鈎蟲病關系不应忽視。“居民点”居民以叢林作大便所,可能是鈎蟲感染的重要來源。11.海南島野糞在短时間內皆被金龜子甲蟲所翻埋。可能因此更有利於鈎蟲幼蟲的发育和感染。在野糞的土壤中采得金龜子甲虫共有9-10种。12.农場中糞线蟲感染率0.61%,“居民点”糞線蟲感染率是1.55%。若检查方法改善,相信其感染率不止此数。

Three new species of fleas are herewith decribed from different regions of China.A series of specimens of Frontoptylla aspiniformis sp. nov. was collected from Ochotonadaurica, Citellus dauricus and Myospalax fontanieri from Kansu and Shensi. The new speciesis named from the lack of characteristic spiniform bristle on the hind apical corner of the movablefinger. This new species is allied to Frontopsylla wagneri Ioff, 1927. A pair of Ctenophthalmus quadratus sp. nov. was taken from a nest of an undetermined...

Three new species of fleas are herewith decribed from different regions of China.A series of specimens of Frontoptylla aspiniformis sp. nov. was collected from Ochotonadaurica, Citellus dauricus and Myospalax fontanieri from Kansu and Shensi. The new speciesis named from the lack of characteristic spiniform bristle on the hind apical corner of the movablefinger. This new species is allied to Frontopsylla wagneri Ioff, 1927. A pair of Ctenophthalmus quadratus sp. nov. was taken from a nest of an undetermined wildrodent from western Yunnan. The name of the new species is used to denote the characteristic squareshape of the posterior lobe of the immovable process of the clasper. The new species is allied toCtenophthalmus yunnanus Jord. 1932 and Ct. formosana Svihla 1942. Three pairs of fleas misidentified, redescribed and figured in 1956 (egg, larval and pupal stagesdescribed) as Stenopnia sidimi Marik. collected from the nests of Apodemus agrarius in Shanghaiare recently rechecked and found to be a new species. It is named Stenoponia shanghaiensis nov. sp.and it is closely allied to S. sidimi. A table showing the differential characteristics of the two Steno-ponia is given.' Holotypes (males) and allotypes (females) of the three new species are all deposited in theCollection of the Military Academy of Medical Sciences. Paratypes of Frontopsylla aspiniformis aredeposited in the National Institute of Parasitology, Shanghai and the Northwestern AgriculturalCollege, Shensi. Paratypes of Stenponia shanghaiensis were deposited in the Division of Parasi-tology, Second Military Medical College, Shanghai.

1957年及1958年由西北农学院及中国医学科学院寄生虫病研究所先后送给我们鉴定的两批蚤类标本中,发现有30个(?8,?22)标本系额蚤属同一新种;分别采自达鸟里鼠兔(Ochotona daurica)、原?鼠(Myospalax fontanierii)及达鸟里黄鼠(Citellus dauricus)等囓齿类动物体外。

 
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