查询词典 Mev

In chapter 4, by AREELS, the Generalized Oscillator Strength Density Spectra were measured in the energy region from 56 to 66eV, with the incident energy 2. 5 keV and energy resolution 80 meV, at scattering angles from 0°to 6°, corresponding to the momentum transfer K〓=0.03~2. 01 a. u. The Fano profile parameters f〓 and q for the optically allowed transition 〓(0, 1)〓P°and the optically forbidden transitions 〓(1, 0)〓S〓and 〓(1, 0)〓D〓 were obtained as a function of K〓. With the hyperspherical coordinate wavefunctions, the dynamical correlation are discussed qualitatively. So, a new experimental way to study dynamical electron correlation effect is opened.In chapter 5, the widely used R-matrix theory was introduced. Then, the GOSDS for the optically allowed excitation series (1s〓)〓S〓→〓(0, 1)〓P°(n=2-4) were calculated by this method, and the Fano profile parameters f〓 and q were obtained sequently. So the electron correlation effect can be described by these parameters quantitatively, and the theoretical results were compared with our AREELS experimental results.

在第四章中，实验上，同样使用角分辨的高能量分辨快电子能量损失谱仪，在2.5keV电子入射能量和80meV的能量分辨下，测量了0°到6°散射角下的He原子双电子激发态在56~66eV的广义振子强度密度谱，这种情况，0°~6°对应的动量转移范围K〓=0.03~2.01a.u。，得到了光学允许跃迁的双电子激发态〓（0，1）〓P〓和光学禁戒跃迁的双电子激发态〓（1，0）〓S〓、〓（1，0）〓D〓的Fano线形参数f〓，q等随动量转移变化的曲线；观测到了几个强度很弱、能级很窄的光学允许和禁戒跃迁双电子激发态，用前人准确的理论结果进行了标识；通过比较弱共振〓（1，0）〓S〓和〓（-1，0）〓S〓的强度随动量转移K〓的变化规律，结合超球坐标理论计算的波函数，定性地阐述了在电子碰撞散射过程中它们各自不同的动力学电子关联效应，发展了一套在实验上研究电子关联效应的新方法。

The CSIRO-GEMOC Nuclear Microprobe is an advanced microanalytical probe based on MeV energy ion beams, designed for geological applications and featuring ）.

澳大利亚联邦科学与工业研究组织的原子微探针是先进的微量分析的探测器，主要研究地质学应用软件。

By applying the above mentioned theoretical approaches in the secondhalf of this thesis, we study several phenomenologically interesting problems including the B meson nonleptonic decays, rare decays and the extractionof the CKM matrix element 〓. With the hypothesis of factorization, thetwo-body nouleptonic decays of B mesons are analyzed.

本文的后半部分应用上述理论进展，分别探讨与研究了B介子的非轻衰变，稀有衰变以及CKM矩阵元Vub的抽取等问题，在因子化假设下，我们分析了B介子的二体非轻衰变，并得到〓介子的衰变常数约为280 MeV。

Methods The H gene was amplified and cloned from the passages of MeV23,MeV26,MeV27, MeV29,MeV32 and MeV37 of the attenuated strain of MeV vaccine strain S191 by reverse tran- scription potymerase chain reaction.

方法利用逆转录—聚合酶链反应方法扩增S191减毒株MeV23、MeV26、MeV27、MeV29、MeV32和MeV37代H基因，测序后与GenBank上U03663的序列进行比对分析。

We report the detection of gamma-ray emissions above 200 megaelectron volts at a significance level of 17sigma from the globular cluster 47 Tucanae, using data obtained with the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope.

根据Fermi伽玛射线空间望远镜的大面积望远镜数据，我们报道对于球状星团47 Tucanae的伽玛射线发射的探测，Fermi的探测结果在200 MeV以上达到17sigma的显著性。

The differential cross section, the polarisation and the spin-rotationparameter in elastic scattering of 180 MeV antiproton by 12C are calculated by means ofGlauber s multiple scattering theory and Pauli-correlated wavefunction .

在Glauber多重散射理论近似下，采用泡里关联的核波函数，使用一种唯象的湮灭势，对180MeV的在12C上的弹性散射微分截面，极化角分布和自旋旋转参数进行了计算。

On the other hand, theenergy of -5(41)〓 state is also a bound state compared with the massof 〓 two baryons, but the binding energy is only few MeV.

而〓的态的能量只接近于〓阈能，结合能为0-10MeV。

The seed embryoes were penetrated by 〓 ion beams of 75 MeV/u and the seed endosperms were implanted by the proper degraded 〓 ions, and soluble protein of the seedling in M1 generation was divided into 5 sections to analyze their changes at different molecular weight. 1 In comparison with control, the relative content of the second section (molecular weight is heavier in all sections) of all irradiated materials got down, while the relative content of the fifth section (molecular weight is the lightest) of those went up. 2 The penetrating seeds made the relative content of the first section (molecular weight is the heaviest) and the third section (mid-molecular weight) drop, while the fourth section went up. Moreover, the changes of the third section and the fourth section of the penetrated materials were clearly different from those of the implanted materials. 3 The difference between implanted embryo and implanted endosperm existed in deeper dropping of the first section and higher rising of the fifth section on relative content of soluble protein of the latter. 4 On irradiated materials at lower doses, there were exceptional changes of soluble protein, it may be thought that there was excited effect of low dose.

1.75MeV／u 〓O〓离子经过适当降能后注入小麦种子的不同部位和贯穿整个种子，对其M1代幼苗的可溶性蛋白质组分以及电泳中不同区段蛋白质组分相对含量加以分析，结果表明：1）同对照相比，随着辐照剂量的增加，所有辐照材料第二区段蛋白质组分的相对含量下降；而第五区段蛋白质组分的相对含量升高。2）种子的贯穿处理，同时也引起第一区段和第三区段蛋白质组分相对含量的下降以及第四区段的升高；其中第三、四区段的变化明显区别于注入效应。3）注入胚和胚乳的区别在于后者第一区段蛋白质组分相对含量的较大下降和第五区段的较大提高。4）小剂量辐照的材料，可溶性蛋白质组分的变化异常，可能与低剂量辐射兴奋效应有关。

Transmitting energy spectra of 500keV―1 MeV He+ ions penetrating 50―90μm thick seed coat of maize,fruit peel of grape and of tomato are measured.

测量了500keV―1MeV的He+离子穿过50―90μm厚度的玉米种皮、葡萄果皮和西红柿果皮的透射能谱。

36Cl and 36S particles were successfully separated in the TOF spectra from the GF-TOF detector for the ion with the energy of 64, 48 and 33 MeV, respectively. The comparison of the separation power of isobars between the GFTOF method and the ΔE-E method was carried out.

在不同能量（64、48和33MeV）下，利用充气飞行时间探测方法对同量异位素36S和36Cl进行鉴别，并与用传统的△E-E方法在相同能量下的鉴别结果进行比较。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。