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     By means of these methods, new orthogonal transforms having good properties in the spectrum domain can be generated from known orthogonal transforms.
     应用这些方法,可以由已知的正交变换生成新的正交变换。
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     The whole solar spectral region from 0.2 to 4.0μm is divided into three broad spectral intervals. The effective broad-band optical depths and single scattering albedos in the atmosphere in each spectral interval can be obtained using parameterized formulae from known atmospheric parameters.
     整个从0.2—3.58μm的太阳光谱区分成三个宽光谱间隔,各波段上的宽带等效光学厚度和单次散射反照率由已知的大气参数直接算出。
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     Structures of the integral invariants of higher-order nonholonomic systems are studied and it is proved that the integral invariants can be obtained from known first integrals.
     研究了高阶非完整系统的积分不变量的构造,证明由已知的第一积分可以得到相应的积分不变量;
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     The method using microcomputer to draw the phase graph of autonomous system on plane of ordinarily differential equation is studied,first a large number of data of orbit are obtained by an appropriate method of numerical calculation from known initial condition,then computer draw the curve of orbit on screen by these data.
     研究利用微机绘制常微分方程平面自治系统相图的方法 ,首先用一种合适的数值算法由已知的初始条件得到轨线的大量数据 ,再利用这些数据在计算机屏幕上画出轨线的图形。
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  “由已知的”译为未确定词的双语例句
     The result 1°K = (1.0000007±0.0000002)K has been obtained by known experimental data;
     由已知的实验数据得出:1°K=(1.0000007±0.0000002)K;
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     In this paper, the mathematical relation between strain fatigue strength distribution and fatigue life distribution is theoretically established by probabilistic approach.
     利用概率论方法建立了应变疲劳强度概率分布与应变疲劳寿命概率分布之间的数学关系式,并根据应变——寿命转换关系,由已知的给定应变水平下的疲劳寿命概率分布求出给定寿命下的应变疲劳强度分布函数,便于进行可靠性分析。
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     The amplitude and the complex propagation constant of every current mode on interconnection lines were investigated in the third chapter of the thesis, and the method of Generalized Pencil-of-Function was used to estimate the unknown current on interconnection lines.
     文章的第三章主要研究了互连线上电流各模幅度和传播常数的参数提取,由已知的离散电流值,应用广义函数束(GPOF)法提取互连线上电流各个模的幅度与传播常数,并对互连线上未知电流分布进行了预测。
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     The primordial tritium formed in the Earth 4.6 billion years ago already decayed to a negligible level in the Earth history. 3H concentration from any known nuclear reactions has been estimated to be less than 0.01 TU (1 TU means 3H/H=10 -18 ),below detection limit.
     地球深处由已知的常规核反应生产的氚含量小于0.01TU(1TU相当3H/H=10-18),处于探测限以下。 地球深处释放的氚表明其可能来源于核聚变。
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     So estimating the independentsources only from the observation is the task of blind source separation(for shortBSS).
     盲信号分离的任务是仅由已知的观测信号估计传输系统和分离出统计独立的信号源。
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     Its concept was first presented by O.
     O.
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     According to the experience formula of Feng Naiqian and N.
     N.
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     Theboundary stress can be get by the PE.
     已知的边界应力光弹性实验给出。
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     The controller consists of multiple fixed controllers with two adaptive controllers.
     该控制器多个参数已知的固定控制器和2个自适应控制器构成.
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     Intelligence: the known and the unknown
     智力:已知的和未知的
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  from known
According to polyacrylamide gel electrophoresis data, the molecular weight of TPDO is around 167 kD, the enzyme consisting of two subunits of 77 and 73 kD, which differentiates TPDO from known enzymes of SH/SS-metabolism of wheat caryopses.
      
The volume of the active site cavity is about 2700 ?3 (8% of the volume of the approximating sphere) as computed by the Monte-Carlo method from known X-ray data.
      
Special curves, called shock polars, are frequently used to determine the state of the gas behind an oblique shock wave from known parameters of the oncoming flow.
      
Expressions that provide the estimation of errors in characteristics of the titration curve from known errors in measurement are obtained.
      
Reconstruction of a function from known integrals of it that are taken along linear manifolds
      
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In this paper the direct moment diatribution method has been developed to determine the natural frequencies of rigid frame structures.

在过去曾在刚构的静力计算里面被广泛应用的弯矩分配法至今逐未见完整的应用于刚构 的自然振动计算中。原因第一是如何用分配法来判别自然振动还不够明确,第二是在振动计 算时分配传递收钦很慢甚至于发散,使计算繁难。本文中对节点没有位移的情况采用在刚架 任一节席 ∑K'=0 的判别式(其中E'代表动力修正刚劲度),如此可以利用连分式由已知 的边界向另一端推算,给出了简单明了的概念和计算方法。对节点有位移的情况应用了干扰 力等于零的判别方法,用直接分配法进行运算,避免了收钦很慢的缺席。这样就使得过去在 刚构静力计算里面能用分配法解决的问题也可同样的在振动计算上得到解决。

The synthesis of a protected N-terminal nonapeptide of the A-chain of bovine insulin N-carbobenzoxy-glycyl-L-leucyl-L-valyl-γ-t-butyl-glutaminyl-S-benzyl-L-cysteinyl-S-benzyl-L-cysteinyl-L-alanyl-O-acetyl-L-serine (IIa) and its methyl ester (I) and hydrazide (II) are described.

本文报告带保护基的牛胰岛素A链氨端九肽酯■和相应的九肽酰肼■与九肽酸■的合成.苄氧羰基甘氨酰-异亮氨酰-缬氨酰-γ-叔丁酯谷氨酸乙酯(III)分别由已知的苄氧羰基缬氨酰-γ-叔丁酯谷氨酸乙酯经催化氢解法脱去N-保护基后与苄氧羰基甘氨酰-异亮氨酰肼(VIII)按迭氮化合物法缩合,以及由已知的苄氧羰基甘氨酰-异亮氨酰-缬氨酸(VIII)与γ-叔丁酯谷氨酸乙酯按碳二亚胺法合成.III经肼解或皂化分别得四肽酰肼■和四肽酸■.苄氧羰基谷氨酰胺酰-S-苄基半胱氨酰-S-苄基半胱氨酰-丙氨酰-O-乙酰丝氨酸甲酯(V)分别由已知的苄氧羰基-S-苄基半胱氨酰-S-苄基半胱氨酰-丙氨酰-丝氨酸甲酯XII_a或苄氧羰基-S-苄基半胱氨酰-S-苄基半胱氨酰-丙氨酰-O-乙酰基丝氨酸甲酯XII以溴化氢-乙酸脱去N-保护基后与苄氧羰基谷氨酰胺对硝基苯酯(XIII)按活化酯法缩合而得.如以溴化氢-三氟乙酸脱去XIIa的N-保护基后与XIII按活化酯法缩合则得Va,合成Va的另一方法是将已知的苄氧羰基谷氨酰胺酰-S-苄基半胱氨酰-S-苄基半胱氨酰肼XIV通过迭氮化物法与丙氨酰-丝氨酸甲酯(X)缩合而得.五...

本文报告带保护基的牛胰岛素A链氨端九肽酯■和相应的九肽酰肼■与九肽酸■的合成.苄氧羰基甘氨酰-异亮氨酰-缬氨酰-γ-叔丁酯谷氨酸乙酯(III)分别由已知的苄氧羰基缬氨酰-γ-叔丁酯谷氨酸乙酯经催化氢解法脱去N-保护基后与苄氧羰基甘氨酰-异亮氨酰肼(VIII)按迭氮化合物法缩合,以及由已知的苄氧羰基甘氨酰-异亮氨酰-缬氨酸(VIII)与γ-叔丁酯谷氨酸乙酯按碳二亚胺法合成.III经肼解或皂化分别得四肽酰肼■和四肽酸■.苄氧羰基谷氨酰胺酰-S-苄基半胱氨酰-S-苄基半胱氨酰-丙氨酰-O-乙酰丝氨酸甲酯(V)分别由已知的苄氧羰基-S-苄基半胱氨酰-S-苄基半胱氨酰-丙氨酰-丝氨酸甲酯XII_a或苄氧羰基-S-苄基半胱氨酰-S-苄基半胱氨酰-丙氨酰-O-乙酰基丝氨酸甲酯XII以溴化氢-乙酸脱去N-保护基后与苄氧羰基谷氨酰胺对硝基苯酯(XIII)按活化酯法缩合而得.如以溴化氢-三氟乙酸脱去XIIa的N-保护基后与XIII按活化酯法缩合则得Va,合成Va的另一方法是将已知的苄氧羰基谷氨酰胺酰-S-苄基半胱氨酰-S-苄基半胱氨酰肼XIV通过迭氮化物法与丙氨酰-丝氨酸甲酯(X)缩合而得.五肽V经溴化氢-乙酸脱去N-保护基后与四肽酰肼IV或四肽酸IV_a分别通过迭氮化物法和碳二亚胺法缩合得到同一的九肽甲酯(I).化合物I用三氟乙酸脱去叔丁酯后肼解得九肽肼(II).化合物I经皂化得相应的九肽酸IIa.

The present paper deals with the synthesis of peptide Ⅰ(N-carbobenzoxyglycyl-L-isoleucyl-L-valyl-γ-tert-butyl-L-glutamyl-L-glutamine carbo-tert-butoxyhydrazide) and peptide Ⅱ (N-carbobenzoxyglycyl-L-isoleucyl-L-valyl-L-glutamyl-L-glutaminyl-S-benzyl-L-cysteinyl-S-benzyl-L-cysteinyl-L-alanyl-L-serine hydrazide), which are protected N-terminal penta-and nona-peptides of the A-chain of bovine insulin respectively. Peptide Ⅰ was prepared from the known tripeptide Ⅲ (N-carbobenzoxy-L-isoleucyl-L-valyl-γ-tert-butyl-L-glutamic...

The present paper deals with the synthesis of peptide Ⅰ(N-carbobenzoxyglycyl-L-isoleucyl-L-valyl-γ-tert-butyl-L-glutamyl-L-glutamine carbo-tert-butoxyhydrazide) and peptide Ⅱ (N-carbobenzoxyglycyl-L-isoleucyl-L-valyl-L-glutamyl-L-glutaminyl-S-benzyl-L-cysteinyl-S-benzyl-L-cysteinyl-L-alanyl-L-serine hydrazide), which are protected N-terminal penta-and nona-peptides of the A-chain of bovine insulin respectively. Peptide Ⅰ was prepared from the known tripeptide Ⅲ (N-carbobenzoxy-L-isoleucyl-L-valyl-γ-tert-butyl-L-glutamic acid ethyl ester) through two alternative routes. Peptide Ⅱ was obtained by the hydrazinolysis of peptide Ⅸ (N-carbobenzoxyglycyl-L-isoleucyl-L-valyl-L-glutamyl-L-glutaminyl-S-benzyl-L-cysteinyl-S-benzyl-L-cysteinyl-L-alanyl-O-acetyl-L-serine methyl ester), which was synthesized from peptide Ⅰ by removing the tert-butyl groups and carbo-tert-bytoxyl group with trifluoroacetic acid and coupling with the known tetrapeptide Ⅷ (S-benzyl-L-cysteinyl-S-benzyl-L-cysteinyl-L-alanyl-O-acetyl-L-serine methyl ester hydrobromide) by means of the azide method. The results from elementary analyses, component amino acid determination, paper chromatography and paper electrophoresis indicated that peptides Ⅰ, Ⅱ, Ⅴ, Ⅵ and Ⅸ are chemically pure and homogeneous. The optical purity of these peptides (except Ⅱ and Ⅸ) has been proved by quantitative enzymic hydrolysis by leucine aminopeptidase. Peptide Ⅸ and therefore, peptide Ⅱ are most probably also optically pure L-peptides, because they were prepared from optically pure L-peptides Ⅰ and Ⅷ by the azide method.

本文叙述带保护基的牛胰岛素A链氨端五肽Ⅰ(N-苄氧羰基甘氨酰-异亮氨酰-缬氨酰-γ-叔丁酯谷氨酰-谷氨酰胺酰肼基甲酸叔丁酯)及九肽Ⅱ(N-苄氧羰基甘氨酰-异亮氨酰-缬氨酰-谷氨酰-谷氨酰胺酰-S-苄基半胱氨酰-S-苄基半胱氨酰-丙氨酰-丝氨酰脐)的合成。Ⅰ是由已知三肽Ⅲ(N-苄氧羰基异亮氨酰-缬氨酰-γ-叔丁酯谷氨酸乙酯)经二种不同的合成步骤分别缩合而得,五肽Ⅰ经三氟乙酸脱去γ-叔丁基和N-叔丁氧羰基后与已知四肽Ⅷ(S-苄基半胱氨酰-S-苄基半胱氨酰-丙氨酰-O-乙酰丝氨酸甲酯溴氢酸盐)借迭氮法缩合而得九肽酯Ⅸ再经肼解而得九肽肼Ⅱ。合成的三肽、四肽、五肽和九肽的化学纯度曾经纸层析、纸电泳、元素分析及氨基酸组成分析证明,其光学纯度(除九肽Ⅱ和Ⅸ外)皆曾经亮氨酸氨肽酶水解及水解物的氨基酸组成测定证明为L型,九肽Ⅸ是由光学纯L型的肽Ⅰ与Ⅷ经迭氦法缩合而成,因此Ⅸ以及Ⅱ很可能为光学纯L型。

 
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