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     Positive Meta-(Semi-) Definite Self Conjugate Solutions to Matrix Equation XA=B over the Quaternion Field
     矩阵方程XA=B的亚(半)正定自共轭四元数矩阵解
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     Some Results of Generalized Positive Definite Matrix
     有关矩阵广义(半)正定的几个结果
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     CS of uppe - pole moiety of the kidney: developing interfacesbetween urine and CM(EUC9 cases), filled by CM(EVEO 6 cases), or being multiple cyst - like dilation(EVEOl case) .
     上(半)肾CS:形成液体界面(EUC9例)、充盈造影剂(EVEO6例)或为多囊状扩张(EVEO1例)。
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     Because negotiation and conflict resolution are complex and unstructured or semi-structured tasks, they need sophisticated decision support.
     由于谈判与冲突的解决是一种非(半)结构化的复杂任务,因此需要更复杂的决策支持。
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     Metapositive semidefinite quaternion matrix is defined, and necessary and sufficient conditions for the existence of and the expressions for metapositive (semi)-definite solutions and unitary solutions of the quaternioo matrix equation AX=B are derived.
     本文定义了四元数体Ω上亚半正定矩阵,给出了Ω上矩阵方程AX=B有亚(半)正定解和西矩阵解的充要条件及其解集结构.
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There are two well known combinatorial tools in the representation theory ofSLn, the semi-standard Young tableaux and the Gelfand-Tsetlin patterns.
      
Using the path model and the theory of crystals, we generalize the concept of patterns to arbitrary complex semi-simple algebraic groups.
      
The symmetric varieties considered in this paper are the quotientsG/H, whereG is an adjoint semi-simple group over a fieldk of characteristic ≠ 2, andH is the fixed point group of an involutorial automorphism ofG which is defined overk.
      
For the flag manifoldX=G/B of a complex semi-simple Lie groupG, we make connections between the Kostant harmonic forms onG/B and the geometry of the Bruhat Poisson structure.
      
Finitely generated profinitely dense free groups in higher rank semi-simple groups
      
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The absorption wavemeter investigated consists of a single loop with a variable gap which is formed by a pair of parallel plates. A calibration formula for the meter was derived on the assumption that the stray capacity could be considered constant and the stray inductance negligible. This simple and useful formula was ex perimentally checked on four different meters, covering the range from about one-and-quarter meter to one-half meter. These melors were carefully constructed and accurately calibrated with...

The absorption wavemeter investigated consists of a single loop with a variable gap which is formed by a pair of parallel plates. A calibration formula for the meter was derived on the assumption that the stray capacity could be considered constant and the stray inductance negligible. This simple and useful formula was ex perimentally checked on four different meters, covering the range from about one-and-quarter meter to one-half meter. These melors were carefully constructed and accurately calibrated with reference to a quartz oscillator by the double-heating method through the use of an auxiliary oscillator of a continuous range of wave-lengths from six to ten meters.

在吸收式波长计之理论上,以其杂储电量为常数而略其杂磁感量,得一简便之公式虽在波长一公尺左右亦可用。所研究之吸收式波长计之构造,系一黄铜制成之单圈,用二黄铜片制成之一缝隙。其缝隙之宽度,可由一螺旋调节。此种波长计,曾 在国立中央研究院物理研究所制造室制造四具,可量波长一有四分之一公尺至公尺亦曾在此研究所之实验室内,与水晶振荡器校准先制一振荡器,可在六至十公尺之间,发生无论任何波长之振荡。并将此振荡器与一水晶振荡器用拍谐法校准。再制一有四分之一公尺至公尺之振荡器,与已与水晶校准之振荡器,再用拍谐法校准,而同时以所制之吸收式波长计量之其实验与理论所得之各结果极为符合。

By surrounding a photo-neutron source of Ra+Ee with a thin spherical sbell of paraffin, a continuous spectrum of scattered neutrons, extending from zero energy to the energies of the primary neutrons is obtained. When a silver detector is exposed to such a spectrum, a part of the neutrons having just the energies at resonance with the silver nuclei is strongly absorbed by the detector and thereby produces the induced β-activity. By measuring the activity of silver and the apparent absorption coefficient of the...

By surrounding a photo-neutron source of Ra+Ee with a thin spherical sbell of paraffin, a continuous spectrum of scattered neutrons, extending from zero energy to the energies of the primary neutrons is obtained. When a silver detector is exposed to such a spectrum, a part of the neutrons having just the energies at resonance with the silver nuclei is strongly absorbed by the detector and thereby produces the induced β-activity. By measuring the activity of silver and the apparent absorption coefficient of the resonance neutrons in a thin silver absorber, the total width of the resonance levels effective to neutron capture and located in the above spectrum is estimated. Let τ He the average value of one half of the half-value width of the resonance levels, expressed in volts, and n be the number of resonance levels here concerned. We find nτ=260 volts for the silver nuclei of half period 22" if the energies of the primary neutrons are taken to be 2x 105 volts. Knowing nτ, we can evaluate the average spacing between adjacent resonance levels effective to neutron capture by giving a plausible value to τ. We find a spacing of the order 80-800 volts if τ be given the value 0.1-1.0 volt. This result is in good accord with the recent theoretical calculation of Bethe and also with observations of resonance groups in the low energy region.

把‘镭—铍’所产生的‘光中子’,穿过一层厘米厚的白蜡,我们便得到一‘连续的中子谱’。他们中间有些中子,能和银的原子核起‘共振作用’,因此可以被银片吸收,而产生‘人工放射银’先测量人工放射的强度和‘共振中子’在银片中的吸收率,再应用原子核内共振能层的宽度,我们便可以求出银的原子核内‘共振能层’的密度大约共振能在零和二十万伏特中间,平均每隔一二百伏特便有一可以吸收质子的共振能层,和理论很相符合。

Nine Marchi series of albino rats in which various points of the retina were destroyed by the method of thermocautery have been carefully studied. The courses and the terminations of the degenerated optic fibers have been determined. The results are summarized by a composite diagram (fig. 9). It shows:(1) that the fibers issuing from the upper quadrant of the retina are lying in the lateral of the optic nerve, crossed in the lower level of the chiasma passed along the medial part of the crossed optic tract and...

Nine Marchi series of albino rats in which various points of the retina were destroyed by the method of thermocautery have been carefully studied. The courses and the terminations of the degenerated optic fibers have been determined. The results are summarized by a composite diagram (fig. 9). It shows:(1) that the fibers issuing from the upper quadrant of the retina are lying in the lateral of the optic nerve, crossed in the lower level of the chiasma passed along the medial part of the crossed optic tract and terminated partly in the ventral of the posterior half of the lateral geniculate body and partly in the caudolateral part of the superior colliculus;(2) that those from the lower retina are lying in the lower part of the nerve, crossed in the higher level of the chiasma, passed along the lateral border of the crossed tract, and terminated partly in the dorsal part of the anterior half of the lateral geniculate body and partly in the medio-oral part of the superior colliculus;(3) that those from the temporal retina are lying in the lateral part of the nerve, crossed in the lower level of the chiasma, passing through the inner part of the tract and terminated partly in the medial part of the lateral geniculate body and partly in the lateral part of the superior colliculus;(4) that those from the nasal retina are lying in the medial of the nerve, crossed in the higher level of the chiasma, passing through the outer border of the tract and terminated partly in the lateral part HSIANG-TUNG CHANGof the anterior half of the geniculate body and partly in the medial part of the superior colliculus;(5) that those from the peripheral margin of the temporal retina are lying in the lateral half of the nerve, uncrossed in the chiasma, passing through the upper half of the tract, terminated in the central part of the geniculate body and never reached the superior colliculus; and(6) that the anterior and posterior accessory optic tracts composed probably of the collaterals of the crossed optic neurons are traced to the corpus Luysii and the nucleus opticus tegmenti respectively.(7) that the optic fibers also terminate in the pretectal nucleus of the thaIamus.

本實驗曾將九隻白鼠之視網膜的各處用電燒法加以毁壞,然後用马基氏染色法(Marchi's method)製成連續切片,详加研究,以斷定其枯萎的神经纖维所经之路徑及终止之點。 實驗结果如下: (一) 自網膜上部發出之神经纖維,位於視神经之外侧,由視神经叉之近尾段跨越於對面,又经對邊視神经通路之内側部,而一部终止於背外側膝體之后腹部,一部终止於上叠體之外侧部。 (二) 自網膜下部發出之纖維,位於視神经之下侧,由視神经叉之近首段跨越於對邊,再沿對邊視神经通路之外侧進行,而一部终止於背外側膝體之前背部,一部终止於上叠體之前内側部。 (三) 自網膜外侧部發出之纖维,位於視神经之外侧部,由視神经叉之近尾段跨越於對面,再沿對邊視神经通路之内側部進行,而一部终止於背外側膝體之后内側部,一部终止於上叠體之外側部。 (四) 自網膜内側部發出之纖维,位於视神经之内側,由视神经叉之近首叚跨越於對面,再经對邊視神经通路之外邊,而一部终止於背外側膝體之前外側部,一部终止於上叠體之内側部。 (五) 自網膜之外側邊緣部發出之纖维,位於视神经之外側,不到對邊,经本邊視神经通路之下部而终止於背外侧膝體之中央。無及於上叠體者。 (六)...

本實驗曾將九隻白鼠之視網膜的各處用電燒法加以毁壞,然後用马基氏染色法(Marchi's method)製成連續切片,详加研究,以斷定其枯萎的神经纖维所经之路徑及终止之點。 實驗结果如下: (一) 自網膜上部發出之神经纖維,位於視神经之外侧,由視神经叉之近尾段跨越於對面,又经對邊視神经通路之内側部,而一部终止於背外側膝體之后腹部,一部终止於上叠體之外侧部。 (二) 自網膜下部發出之纖維,位於視神经之下侧,由視神经叉之近首段跨越於對邊,再沿對邊視神经通路之外侧進行,而一部终止於背外側膝體之前背部,一部终止於上叠體之前内側部。 (三) 自網膜外侧部發出之纖维,位於視神经之外侧部,由視神经叉之近尾段跨越於對面,再沿對邊視神经通路之内側部進行,而一部终止於背外側膝體之后内側部,一部终止於上叠體之外側部。 (四) 自網膜内側部發出之纖维,位於视神经之内側,由视神经叉之近首叚跨越於對面,再经對邊視神经通路之外邊,而一部终止於背外側膝體之前外側部,一部终止於上叠體之内側部。 (五) 自網膜之外側邊緣部發出之纖维,位於视神经之外側,不到對邊,经本邊視神经通路之下部而终止於背外侧膝體之中央。無及於上叠體者。 (六) 前副視神经通路,终止於路易斯氏體(Corpus Luysii),而后副视神经通路則终止於视底巢(

 
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