a-type

• In this chapter , a - type positive homogeneous operators are generalized as e - a type positive homogeneous operators . moreover , the continuity , properties of norm , and completeness of operator space are investigated for e - a type positive homogeneous operators
  本章将正齐次算子推广为?正齐次算子，并讨论了?正齐次算子的连续性、范数性质、以及算子空间的完备性等。
• As a special case of mixed monotone operators with a - t type convexity and concavity , the mixed monotone operators with a - type positive homogeneity have similar results on the sufficient and necessary conditions for existence and uniqueness of their fixed points
  由于?正齐次算子的讨论，结果比较完善，混合单调的?正齐次算子作为? t型凹凸混合单调算子的特殊情况，我们自然有其存在不动点的充要条件。
• 4 . the dipole squeezing of a a - type three - level atom interacting with a strong coherent field in a high - q kerr cavity is investigated . the effects of the kerr medium , the field - atom coupling coefficient and the detuning on the atomic dipole squeezing are discussed by numerical calculation
  4 .研究了充满高qkerr介质腔内强相干光场与a型三能级原子相互作用中原子的偶极压缩效应，着重讨论了kerr介质、原子与光场间的藕合系数以及失谐量对原子偶极压缩的影响。
• The state function for the interaction of a a - type three - level atom with two - mode squeezing vacuum field is derived in the paper . the influences of detuning 8 and initial squeezed light - field factor r on the cauchy - schwartz inequality , light squeezing and nonclassical properties are investigated
  本文还导出了双模压缩真空场与型三能级原子非共振相互作用系统的态函数，研究了场模失谐量和场的初始压缩因子r对原子布居概率、光场压缩和非经典特性的影响。
• According to the constructive principles of these diagrams , the following aspects must be thought carefully : the rock types to be studied must be the same or nearly the same as those that can be discriminated by the diagram ; to avoid mixed or incorrect signals that could be produced , two or more such diagrams shall have to be jointly used ; for special rock types , such as a - type granites or potassic igneous rocks , special discriminative diagrams have to be determined and selected respectively ; the samples to be studied can not be altered ; in general , the diagrams must be used carefully with archean samples ; the petrotectonic assemblage or an expert system are recommended to be used together with the discrimination diagrams
  强调指出：所采集的样品必须新鲜（无蚀变或极弱蚀变） 、非堆晶的岩石；选择的判别图解必须与判别的岩石类型相一致，即对花岗岩类要用花岗岩的判别图解，不能用玄武岩的判别图解；对特殊类型岩石要选择专门用于该类型岩石的判别图解，如碱性花岗岩，钾质火成岩；要应用多种图解综合判断；不能用单个样品，而应作多个样品分析；要注意所选择判别图解的特别说明等。
• Geochronological , geochemical and sr - nd isotopic data are reported for the alkaline igneous rocks ( syenites and zhaibei aluminous a - type granite ) and chebu gabbro in southern jiangxi province . shrimp zircon u - pb dating results indicate that the quannan syenite , zhaibei a - type granite and chebu gabbro formed during the early yanshanian period
  对赣南燕山早期的富碱火成岩(正长岩和寨背铝质a型花岗岩)和车步辉长岩进行了详细的年代学、元素和sr - nd地球化学研究。
• We clarified that if the three - level atom and the two - mode cavity field are all in the coherent superposition state , the different transition processes interfere each other , the emission spectrum exhibits phase sensitivity . second , the phase properties of the two - mode su ( 2 ) coherent field interacting with a - type three - level atom and the two - mode su ( 1 , 1 ) coherent field interacting with two atoms are investigated
  我们考察了双模su ( 2 )相干场与型三能级原子相互作用系统以及双模su ( 1 ， 1 )相干场与双原子相互作用系统中双模光场的相位性质，证明了光场每个j迄凶博士学位论文docioraldisser ” i人lion
• It is derived the hamiltonian for the interaction of a - type three - level atom with a two - mode quantum cavity field from the general interaction hamiltonian between a multi - level atom and a multi - mode radiation field , and reduce it into an effective two - mode raman - coupled mode under large detuning condition . it is proposed a modified effective hamiltonian for the two - mode raman - coupled model . it is found the time - dependent state vectors and present validity conditions for the involved interaction hamiltonians . it is shown that in the study of the two - mode raman - coupled model it is not enough to retain only the usually used effective hamiltonian , one must also take into account the ac stark shift of the atomic levels ( at least one of the levels ) . finally , it is studied the atomic dynamics in the interaction of a - type three - level atom with a two - mode quantum cavity field and in the two - mode raman - coupled model . it is found that the number of collapse - revivals , the collapse time and the revival time show new characteristics
  从多能级原子与多模光场的相互作用哈密顿量出发，导出了型三能级原子与双模光场的相互作用哈密顿量.在大失谐条件下将其化成等效的二能级形式双模喇曼耦合模型.提出了该模型的一个改进型等效哈密顿量.该哈密顿量由两部分构成：一部为通常所谓的等效哈密顿量，另一部分描述原子能级的动态斯塔克移动.研究表明，在双模喇曼耦合模型的研究中，只考虑前者是不够的，还必须考虑后者.最后，我们研究了该系统中原子的动力学行为，发现崩塌-复苏的数目、崩塌时间和复苏时间均呈现新的特性
• In this paper , the system of a a - type three - level atom interacting with two - mode su ( 1 , 1 ) coherent states in a kerr - like medium is studied by means of the quantum theory , and the state function for the resonant or non - resonant interaction is derived . using the state function , the kerr effect on the quantum dynamics and nonclassical properties in the system is investigated ; and the influences of the detuning and initial atomic on the quantum and nonclassical properties in the non - resonant interaction study system
  本文运用全量子理论，研究了类kerr介质中双模su ( 1 ， 1 )相干态场与型三能级原子相互作用系统，分别导出了该系统在共振及非共振相互作用时的态函数，并以此为出发点，研究了kerr效应对系统的量子动力学和非经典特性的影响，场模失谐量、原子初态对非共振作用系统的量子动力学和非经典特性影响。
• Abstract : in view of the application of calculation formulae on clamping force of circular eccentric , this paper presents classification by self - locking degree and corresponding calculation of clamping force . on the basis of analyzing an comparing a - type and b - type eccentrics , it is concluded that the former has an advantage over the latter . and then the reasonableness of the standard eccentricity and tolerances is discussed and some revisions are suggested . this offers a dependable theoretical foundaation for design and application of the device
  文摘:针对圆偏心夹紧机构夹紧力计算公式的应用问题，提出了按圆偏心自锁程度不同的分类方式及其相应的夹紧力计算方法；分析比较了a 、 b两类偏心的夹紧特性，得出了前者优于后者的正确结论；讨论了标准偏心轮的偏心距及其公差取值的合理性问题，并提出了相应的修改建议，为正确设计和应用该机构提供了可靠的理论依据。