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existence of
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  存在
     The Practice, Life and Existence of Aesthetics
     美学的实践、生命与存在
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     The Existence of Riemann-Stieltjes Integral
     黎曼—斯帝捷积分的存在条件
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     THE POSSIBILITY OF THE EXISTENCE OF AN INTERMEDIATE STRUCTURE IN THE C~(12) (d,p)C~(13) REACTIONS
     C~(12)(d,p)C~(13)反应中存在一个中间结构的可能性
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     The holographic information capacity of films in the existence of random phase fluctuations
     存在位相随机起伏时胶片的全息信息容量
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     CONDITIONS OF EXISTENCE OF THE LIMIT CYCLES OF LI(?)NARD EQUATIONS WITH ALTERNATE DAMPING
     关于具有交变阻尼的Liénard方程存在多个极限环的条件
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  存在性
     Existence of Periodic Solutions and Regularity of Global Attractors for the Derivative Ginzburg-Landau Equations
     导数Ginzburg-Landau方程周期解的存在性以及整体吸引子的正则性
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     The Studies on the Mechanism of Formation, Evolvement and Existence of Price Bubbles
     价格泡沫的形成机制、演变机理与存在性研究
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     Qualitative Analysis of Polynomial Poincaré Equation and Existence of Periodic Solutions of a Class of Ecology Equations
     多项式Poincaré方程的定性分析和一类生态方程周期解的存在性
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     SOME THEOREMS ON THE EXISTENCE OF PERIODIC SOLUTIONS FOR NON-LINEAR DIFFERENTIAL EQUATIONS
     关于二級非线性微分方程周期解存在性的定理
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     THE EXISTENCE OF SOLUTIONS FOR NONLINEAR WAVE EQUATIONS
     非线性波动方程解的存在性
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  “existence of”译为未确定词的双语例句
     CONCRETE EXAMPLES OF EXISTENCE OF THREE LIMIT CYCLES FOR THE SYSTEM dx/dt=X_2(x,y),dy/dt=Y_2(x,y)
     在平衡点附近dx/dt=P,dy/dt=Q出现三个极限环的例子(P,Q 为二次多项式)
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     A NECESSARY AND SUFFICIENT CONDITION OF THE EXISTENCE OF THE INVARIANT 1 IN THE NORMAL CLASS ■(R,S)
     规范类■(R,S)有恒1的充分必要条件
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     Four-wave mixing effect in the existence of SBS field
     有SBS场在内的四波混频过程
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     EXISTENCE OF GLOBAL SOLUTION OF A CLASS OF NONLINEAR HYPERBOLIC CONSERVATION SYSTEMS
     一类非线性双曲型方程组的大范围解
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     On the Existence of Limit Cycle for a Type of Plane Cubic System
     也论一类平面三次系统的极限环
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  existence of
We prove the existence of such a compactification for arbitraryk.
      
For such maps, we prove the existence of an algebraic (?,+)-action φ on ?n for whichF is invariant.
      
In this paper, we will formulate a general (parameter dependent) semistability concept for such triples, which generalizes the classical Hilbert--Mumford criterion, and we establish the existence of moduli spaces for the semistable objects.
      
This includes the polynomiality of the invariant subalgebra of the symmetric algebra of a (truncated) parabolic subalgebra, the existence of a slice to the regular coadjoint orbits and the construction of maximal Poisson
      
We study the general question of the existence of self-similar lattice tilings of Euclidean space.
      
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1. In order to study the distribution of the two species of bedbugs,Cimex lectularius and C. hemiptera, 81 representative localities of 23provinces and Inner Mongolia were selected for the collection ofbedbugs.2. Among the 81 localities, 55 had only C. lectularius, 11 had onlyC. hemiptera, while the remaining 15 localities had both species.3. Atmospheric temperature forms one of the most important factorslimiting the distribution of bedbugs. Consequently C. hemipteralimits itself in the North at Chian-Yang of...

1. In order to study the distribution of the two species of bedbugs,Cimex lectularius and C. hemiptera, 81 representative localities of 23provinces and Inner Mongolia were selected for the collection ofbedbugs.2. Among the 81 localities, 55 had only C. lectularius, 11 had onlyC. hemiptera, while the remaining 15 localities had both species.3. Atmospheric temperature forms one of the most important factorslimiting the distribution of bedbugs. Consequently C. hemipteralimits itself in the North at Chian-Yang of Fukien, Lo-Chang ofKuangtung, Heng-Yang of Hunan, Tsun-I of Kweichow, Ch'eng-Tuof Szechuan and Ya-An of Sik'ang. In these localities the wintertemperature is usually at 4°- 8℃. North of this belt, because thewinter temperature is much lower, the condition is not suitable forthe existence of this species. Cimex lectularius is more resistant tocold. It is, however, less resistant to extreme heat. In localities inSouth China where the summer temperature runs over 30℃, thecondition is not suitable for the survival of this species. Its southernlimit of distribution has been found to be a line connecting Amoy,Chu-Kiang of Kuangtung, Kwei-Lin of Kuangsi, P'ing-T'ang of Kwei-chow and Meng-Tze of Yunnan.4. The relationship of latitude, altitude, atmospheric pressure andhumidity to the biology of bedbugs were briefly discussed.

(一)作者在1950—1951年,曾收集中国81个地区的臭虫标本,作一系统的调查研究,这81个地区包括23省和内蒙古自治区。 (二)在81个地区所采集到的标本,有55个地区只有温带臭虫,44个地区只有热带臭虫,其余15个地区两种臭虫均有发生。 (三)气温是影响臭虫分布的重要因素之一。热带臭虫的分布,北至福建的建阳,广东的乐昌,湖南的衡阳,贵州的遵义,四川的成都(李、孟1951),西康的雅安,这些地区的冬季气温大都在4°—8℃。在这些北分布地区以北的地区,冬季气温较低,大多不适于它的生长,温带臭虫的抗寒力较强,在华北、东北、西北均有发生,它的分布南至福建的厦门,广东的曲江、广西的桂林、贵州的平塘(李、孟1951)、云南的蒙自,这些地区夏季气温均在30℃以下,仍可适于它的生长。 (四)地理上的经度与臭虫的分布并无关系,但纬度与臭虫的分布有关,热带臭虫的分布北至北纬30°41″(成都),它的发生地带以热带为主,在亚热带亦可生长,温带臭虫的分布南至北纬23°25′(蒙自),它的发生地带以亚热带及温带为主但传入部分的热带地区,亦可生长。 (五)地势过高可以影响热带臭虫的发生,在昆明、大理、昭通、丽江等地,拔海高度均在1...

(一)作者在1950—1951年,曾收集中国81个地区的臭虫标本,作一系统的调查研究,这81个地区包括23省和内蒙古自治区。 (二)在81个地区所采集到的标本,有55个地区只有温带臭虫,44个地区只有热带臭虫,其余15个地区两种臭虫均有发生。 (三)气温是影响臭虫分布的重要因素之一。热带臭虫的分布,北至福建的建阳,广东的乐昌,湖南的衡阳,贵州的遵义,四川的成都(李、孟1951),西康的雅安,这些地区的冬季气温大都在4°—8℃。在这些北分布地区以北的地区,冬季气温较低,大多不适于它的生长,温带臭虫的抗寒力较强,在华北、东北、西北均有发生,它的分布南至福建的厦门,广东的曲江、广西的桂林、贵州的平塘(李、孟1951)、云南的蒙自,这些地区夏季气温均在30℃以下,仍可适于它的生长。 (四)地理上的经度与臭虫的分布并无关系,但纬度与臭虫的分布有关,热带臭虫的分布北至北纬30°41″(成都),它的发生地带以热带为主,在亚热带亦可生长,温带臭虫的分布南至北纬23°25′(蒙自),它的发生地带以亚热带及温带为主但传入部分的热带地区,亦可生长。 (五)地势过高可以影响热带臭虫的发生,在昆明、大理、昭通、丽江等地,拔海高度均在1922米以上,热带臭虫并无发生,但对温带臭虫并不影响。 (六)气压与地势的高低有关,昆明、大理,昭通、丽

A method for the paper chromatography of aureomycin is here described. Out of 43 kinds of developing solvents studied, four have been proved satisfactory. They are: (1) n-butanol saturated with M/10 citrate buffer of pH 3.9, (2) 1% aqueous solution of boric acid, (3) M/10 citrate buffer of pH 3.9 saturated with n-butanol, and (4) n-butanol-acetic acid-water (5∶1∶4). The upward R_F values for the above four solvent systems are 0.40 ± 0.02, 0.83 ± 0.02, 0 and 1 respectively when Whatman No. 1 filter paper is...

A method for the paper chromatography of aureomycin is here described. Out of 43 kinds of developing solvents studied, four have been proved satisfactory. They are: (1) n-butanol saturated with M/10 citrate buffer of pH 3.9, (2) 1% aqueous solution of boric acid, (3) M/10 citrate buffer of pH 3.9 saturated with n-butanol, and (4) n-butanol-acetic acid-water (5∶1∶4). The upward R_F values for the above four solvent systems are 0.40 ± 0.02, 0.83 ± 0.02, 0 and 1 respectively when Whatman No. 1 filter paper is used. For general purpose the first solvent is preferred. With this solvent, the R_F values for terramycin hydrochloride, streptomycin hydrochloride-calcium chloride complex and chloromycetin are 0.32±0.03, 0 and 1 respectively. Chromatograms containing aureomycin may be easily recognized with naked eyes if the amount of the antibiotic present is not less than 5 μg/cm~2, or by fuming with HC1- vapour to give an orange stain of anhydroaureomycin hydrochloride if not less than 1.6 μg/cm~2, or by agar-plate method if not less than 0.3 μg/cm~2, or by fluorescence method if not less than 0.09 μg/cm~2. Under an UV-lamp, aureomycin hydrochloride shows a bright lemon-yellow fluorescence; terramycin, dirty yellow; and anhydroaureomycin hydro- chloride-boric acid complex, dull brown. The fluorescing chromatograms can be photo- graphed. The present method can be directly employed for qualitative as well as rough quantitative determination of the aureomycin in the beer of Streptomyces aureofaciens. It may serve as a useful aid in antibiotic screening. By means of mixing chromatography, aureomycin may be detected in the human urine collected after oral administrations. Using 1% boric acid as the developing solvent, anhydroaureomycin hydrochloride can be successfully separated from aureomycin hydrochloride by chromatography. In fact, the existence of a trace of the anhydro-compound has been detected in some crude aureomycin preparations.

本報告提供了一個金黴素的紙上層析方法。在28°用Whatman 1號濾紙研究了43種紙上層析用的顯層溶劑。用其中的四種顯層溶劑,M/10檸檬酸鹽pH 3.9緩衝液飽和的丁醇(I),1%硼酸水溶液(II),丁醇飽和的M/10檸檬酸鹽pH3.9緩衝液(III),和丁醇-醋酸-水(5∶1∶4)(IV)顯層,都可以得到較滿意的色層。它們的比移分別是0.40±0.02,0.83±0.02,0.87±0.01和0.88。這四種中尤以顯層溶劑(I)的結果最佳。用顯層溶劑(I),在同一條件下的鹽酸地黴素、鹽酸鏈黴素氯化鈣複鹽和氯黴素的比移,分別是0.32±0.03,0和1。色層辨認的方法,在超過5微克/厘米~2以上可用肉眼;1.6微克/厘米~2以上可用氯化氫氣體顯色;在0.3微克/厘米~2以上可用瓊脂平板培養基制菌法;在0.09微克/厘米~2以上可用螢光法。色層螢光可以直接攝照。 應用本法可以直接鑑定金黴菌發酵液中的金黴素,並可以初步估計含量。用混合層析法也可以鑑定尿中的金黴素。 應用1%硼酸水溶液作顯層溶劑,可以鑑別鹽酸金黴素和鹽酸脫水金黴素,用本法曾鑑定了幾批鹽酸金黴素粗製品中有微量脫水化合物的存在。

The structure of general circulation over the Asia, in the period of Jan. 1st. to Mar. 10th., 1956, is investigated using all available aerological material. It is found that:1.During thus period there existed two jet streams over the continent. This two jets combined into one jet at the meridian 140°E.2.Both jets over Eastern Asia are accelerated downstream. The southern one starts acceleration from the meridian 75°E, while the northern one was not acce 1e rated before reading Ere meridian 100°E.3.The baroclinity...

The structure of general circulation over the Asia, in the period of Jan. 1st. to Mar. 10th., 1956, is investigated using all available aerological material. It is found that:1.During thus period there existed two jet streams over the continent. This two jets combined into one jet at the meridian 140°E.2.Both jets over Eastern Asia are accelerated downstream. The southern one starts acceleration from the meridian 75°E, while the northern one was not acce 1e rated before reading Ere meridian 100°E.3.The baroclinity of the atmosphere over Eastern Asia is mainly concentrated in the vicinity of the Tibetan Plateau.It is considered that the existence of the Tibetan Plateau has the following three effects on the general circulation:1.The existence of the plateau intensifies the baroclinity (along the N-S as well as W-E directions) around the plateau, south of which a vertical circulationis formed.2.The confluence of the two jets, thus also the acceleration of them, is due to the existence of the plateau.3.The existence of plateau makes the southern jet intensified and steady.

根据1956年1月到3月上旬亚洲地区高空资料,对亚洲大陆上空的大气环流进行了探讨。作者得出了下列的事实: 1)在上述时间期限内的平均情况表明,亚洲大陆上空存在着二支急流。这二支急流在东经140°经度上已经汇合。 2)二支急流在东亚部分都表现有向东加速的现象。南支急流自东经75°就开始明显地向东加速。而北支急流的加速自东经100°附近才开始。 3)东亚大陆上大气的斜压性主要是集中在高原的附近。 另外对上述现象也作了一些初步的研究。作者认为西藏高原的存在对大气环流有下列三方面的影响: 1)高原加强了大气的斜压性,并且在高原南方形成垂直环流。因而强烈的加速了南支急流。 2)高原的存在使得南北二支急流在其东侧互相接近,显然地影响了急流的加速。 3)高原保证了南支急流强大而且稳定,这就是说每天每年同季的变化都小。

 
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