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We consider some remarkable central elements of the universal enveloping algebraU(gl(n)) which we call quantum immanants.


They result in many nontrivial properties of quantum immanants.


Quantum integrable systems and differential Galois theory


This paper is devoted to a systematic study of quantum completely integrable systems (i.e., complete systems of commuting differential operators) from the point of view of algebraic geometry.


We study the tensor category of tilting modules over a quantum groupUq with divided powers.

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We study the tensor category of tilting modules over a quantum groupUq with divided powers.


Using the theory of crystal bases as the main tool, we prove a quantum analogue of Richardson's theorem.


A Fock space is introduced that admits an action of a quantum group of type A supplemented with some extra operators.


In this article, we focus on a quantum detection problem, where the goal is to construct a tight frame that minimizes an error term, which in quantum physics has the interpretation of the probability of a detection error.


The coincidence image with coherent Gaussian beams is due to intensityintensity correspondence, a classical nature, while that with entangled photon pairs is due to the amplitude correlation a quantum nature.

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This will be largely due to the advanced techniques related to single quanta, especially infrared single photons.


The original wave function of the excitation state of single particles has been replaced by a new wave function of the twoquanta quasicoherent state.


Caffeine and RyanodineInduced Changes in the Spectrum of Spontaneously Secreted Quanta of the Mediator in the Neuromuscular Sy


The stability of weakly ionized Dtype waves is discussed in the case of a layer of plasma behind the front of a Lyman continuum of hydrogen which is optically thick for quanta.


The degradation of the azo dye Acid Yellow 99 under irradiation with γquanta and vacuum UV radiation was compared.

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Since the discovery of CNTs, people have employed more serious quantum mechanical methods, including the electronic band theory, tightbinding theory, scattering theory and density function theory, to investigate FE of CNTs.


They are attractive because they are deterministic, in particular, the QSDC protocol is fully quantum mechanical.


Selective control of the observables in the ensemble of quantum mechanical molecular systems


A new approach to synthesize algorithms for selective control of the observables in quantum mechanical systems in the presence of additional constraints during the whole period of control is proposed.


Modeling ethylene and propylene homopolymerization by latetransitionmetal catalysts: A combined quantum mechanical and stochas

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 The antibiotic properties of a series of hydroquinones were examined in an effort to study the quantitative structure activity relationship with the application of Topliss, Hansch and FreeWilson methods.It seems likely that the pharmacological activity of the substituted hydroquinones. is realized by the charge transfer complex which is formed by the transfer of electrons from receptor site to the specific hydroquinone. In Hansch analysis, the parameter LEMO was calculated by molecular orbital technique and... The antibiotic properties of a series of hydroquinones were examined in an effort to study the quantitative structure activity relationship with the application of Topliss, Hansch and FreeWilson methods.It seems likely that the pharmacological activity of the substituted hydroquinones. is realized by the charge transfer complex which is formed by the transfer of electrons from receptor site to the specific hydroquinone. In Hansch analysis, the parameter LEMO was calculated by molecular orbital technique and a better correlation was found in combination with othet parameters.The experimental values of lg(1/C) agree fairly with the values calculated by both Hansch and FreeWilson equations.  本文用Topliss,FreeWilson和Hansch方法对氢醌类化合物的抗菌活性进行了QSAR研究。取代氢醌的抗菌活性可能是通过药物与受体间的电子转移所生成的电荷转移复合物而实现的。在Hansch分析中,应用了表征药物与受体间化学反应性的量子化学参数LEMO。三种方法配合取得了一致的良好结果。  In this work we studied systematically the correlation between the electronegativity, n/r or n*/r*, and the vibrational frequency of the chemical bond XH, vXH, in the covalent molecular hydrides. The results showed that there is good linear relationship between them.For the molecules of the type HnXH, two cases were discussed.Case I, when the elements (X)are situated in the same group in the periodic table, the linear relation may be expressed in the following formala:(1)Here K is a constant which varies... In this work we studied systematically the correlation between the electronegativity, n/r or n*/r*, and the vibrational frequency of the chemical bond XH, vXH, in the covalent molecular hydrides. The results showed that there is good linear relationship between them.For the molecules of the type HnXH, two cases were discussed.Case I, when the elements (X)are situated in the same group in the periodic table, the linear relation may be expressed in the following formala:(1)Here K is a constant which varies with the number of valence electrons on the atom X.Case II , when the elements(X) are situated in the same period in the periodic table, the empirical equation can be written as follows:(2)Here A and B are constants determined by the principle quantum number and the number of valence electrons in atom X respectively.For the molecules of the type YnXH there is also a good linear relationship between vXH and ∑n*/r*(Y), that is,vXH×102=a + b∑n*/r*(Y)(3)Here a and b are constants determined by the position of the atom(X) in the periodic table.Using the above equations we have calculated the vibrational frequences, vXH The values obtained are close to those obtained by other authors. Therefore, the results also confirm that the values of electronegativty calculated by our methods published in the previous papers(11) are trustworthy.In addition some characteristics of these equations were analyzed and discussed preliminarily.  本文系统地对共价型分子氢化物中ν_(XH)与电负性n/r(X)或n~*/r~*(Y)的关系进行了研究。发现二者之间存在良好的线性关系。在HnXH型分子中,若X为周期表中的同族元素时,其线性方程为:υ_(XH)×10~(2)=Kn/r(X),式中K为与原子X的价电子数有关的常数;若X为同周期元素时,其线性方程为:υ_(HX)×10~(2)=A+B n/r(X),其中A、B为常数,其值分别由原子X的主量子数与价电子数所决定。在YnXH型分子中,υ_((HX)与n~*/r~*(Y)也存在线性关系:υ_(XH)×10~(2)=a+b∑n~*/r~*(Y),式中a、b为常数,其值与元素X在周期表中的位置有关。根据本文所提出的方程式所计算的γ_(XH)值与已发表的数据相符或相近。因此,这些公式可作为应用红外光谱测定原子或基团电负性的依据,从而也验证了作者之一于前文所提出的计算电负性的方法的合理性。此外,还对这些方程式的特性作了初步的分析与讨论。  On the isolated rat phrenic nervediaphragm preparations, sparteine sulfate inhibited the twitch response of the diaphragm elicited by electrical stimulation of the phrenic nerve in a concentration dependent manner. In some preparations, a temporal increase of the twitch response was observed at a lower concentration.Higher concentration of sparteine sulfate also had some inhibitory action on the directly elicited twitch of the diaphragm. The action of sparteine sulfate could not be antagonized by neostigmine... On the isolated rat phrenic nervediaphragm preparations, sparteine sulfate inhibited the twitch response of the diaphragm elicited by electrical stimulation of the phrenic nerve in a concentration dependent manner. In some preparations, a temporal increase of the twitch response was observed at a lower concentration.Higher concentration of sparteine sulfate also had some inhibitory action on the directly elicited twitch of the diaphragm. The action of sparteine sulfate could not be antagonized by neostigmine methylsulfate, 4aminopyridine or CaCl2·At a concentration of 4 × 104 M, sparteine sulfate did not significantly alter the resting membrane potential of muscle cells. However, concentration of 2×103 M, it had a tmarked depolarizing action. Sparteine sulfate increased at first, and then decreased the frequency and amplitude of miniature end plate potential (mepp). It also reduced he amplitude of end plate potential (epp), and resulted in an initially excitatory and then inhibitory change of epp quantal content. In conclusion, sparteine sulfate had both the presynaptic and postsynaptic action on the neuromuscular transmission.  硫酸无叶豆碱(SP)对离体大鼠膈神经膈肌标本的作用,可使电刺激膈神经所致膈肌收缩产生浓度依赖性抑制。在较低浓度时使部分膈肌标本出现收缩短暂增强的现象。较高浓度时对直接刺激膈肌所致收缩,也有一定抑制作用。SP于4×10~(4)M时,不引起膈肌细胞膜电位的明显变化;但浓度增至2×10~(3)M时,则有明显去极化作用。SP先使小终板电位(mepp)出现短暂的兴奋,频率增加和幅度增大,然后转为抑制。SP也能降低终板电位(epp)幅度;使epp量子含量发生先兴奋后抑制的双相变化。以上结果提示SP对神经肌肉传递的作用,有突触前和突触后两种因素参与。   << 更多相关文摘 
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