p耗散算子的扩张

该文研究Ｂａｎａｃｈ空间中ｐ耗散算子的极大耗散扩张．通过建立自然边界空间，将ｐ耗散算子的极大耗散扩张与自然边界空间中极大负子空间—一对应，并给出表达式．利用这一工作本文给出一类Ｓｃｈｒｏｄｉｎｇｅｒ算子的扩张应用．     

含非线性修正项的双光子Jaynes-Cummings模型中光子反聚束效应的研究

研究了一个二能级里德伯原子在计及原子散射的二级修正项时,与单模热光场双光子相互作用系统中光子的反聚束效应,着重讨论了非线性修正项,双光子失谐量以及热噪声对光子反聚束效应的影响． 关键词：     

Generation and measurement of complex laser pulse shapes in the SG-Ⅲ laser facility

The generation and measurement of complex ultraviolet laser pulse shapes is demonstrated in the SG-III laser facility. Relatively high contrast ratio of 300∶1 required by the physics experiment is achieved and successfully measured. Two continuous main shots validate the reproduction and the stability of the pulse shape, which provide solid foundation for precise physics experiment and laser power balance.     

基于电源电流和输出电压的模拟电路故障模型研究

基于模拟电路电源电流和输出电压的协同分析,研究了复数域的故障建模方法,提出了一种2D故障模型的数学表达式,该模型为复平面上的一簇圆轨迹。为了扩大故障轨迹之间的距离,在相同测量精度和元件容差条件下提高故障检测率和隔离率,进一步提出了3D复数空间的优化故障模型。两种故障模型都极大简化了测点选择算法和模拟故障状态仿真的复杂度,理论上对模拟电路单故障的覆盖率为100%。基于滤波器电路的实验仿真结果验证了两种故障模型的有效性。     

用卡尔曼滤波-分光光度法分析α-羰基烯酮环二硫代缩酮化合物

本文将卡尔曼滤波－分光光度法用于α－羰基烯酮环二硫代缩酮化合物的分析。通过对卡尔曼滤波新息序列和滤波过程中浓度变化趋势的考察，表明该方法用于该类化合物的分析是可行的和可靠的     

自离子辐照对兆伏注P+硅中二次缺陷的影响

用平面透射电子显微术和剖面透射电子显微术以及卢瑟福背散射沟道谱技术研究了兆伏注P⁺硅中的二次缺陷以及自离子辐照对它们的影响.实验结果表明，二次缺陷峰的深度稍大于平均投影射程.实验还发现，用适当能量和剂量的自离子在退火之前辐照兆伏注P⁺硅样品，可以抑制二次缺陷的生成，但如果在退火之后辐照，则会得到相反效果.对此现象的物理原因进行了讨论.另外，还给出了Si⁺，P⁺在硅中形成二次缺陷带的临界剂量，并且对临界剂量与注入能量的关 关键词：     

双模压缩真空场作用下二能级原子的偶极压缩与相干俘获

运用全量子理论研究了双模压缩真空场与二能级原子双光子作用过程中原子的量子行为,论证了原子发生相干俘获的条件,讨论了压缩参数对原子偶极压缩的影响. 关键词：     

非晶PET纤维的分子链段取向分布的研究

用对称透射法,收集在室温下不同拉伸比的非晶聚酯（ＰＥＴ）纤维之二有Ｘ射线散射（ＷＡＸＳ）强度函数Ｉ（κ,α）,采用自编ＭＰＳ９６型全谱分峰程序,将不同方位角α测得的ＷＡＸＳ强度曲线上的４个非晶重叠峰进行分解,获得分子链间原子 射引起的２个峰为：ＫＡ＝０．１４１ｎｍ＾－１,ＫＢ＝０．１７２ｎｍ＾－１;分子链内原子 射引起的２个峰为;ＫＣ＝０．３１１ｎｍ＾－１,ＫＤ＝０．５５５ｎｍ＾－１,详细分析了     

Effective sideband cooling in an ytterbium optical lattice clock

Sideband cooling is a key technique for improving the performance of optical atomic clocks by preparing cold atoms and single ions into the ground vibrational state. In this work, we demonstrate detailed experimental research on pulsed Raman sideband cooling in a $^{171}$Yb optical lattice clock. A sequence comprised of interleaved 578 nm cooling pulses resonant on the 1st-order red sideband and 1388 nm repumping pulses is carried out to transfer atoms into the motional ground state. We successfully decrease the axial temperature of atoms in the lattice from 6.5 μK to less than 0.8 μK in the trap depth of 24 μK, corresponding to an average axial motional quantum number $\langle n_z\rangle<0.03$. Rabi oscillation spectroscopy is measured to evaluate the effect of sideband cooling on inhomogeneous excitation. The maximum excitation fraction is increased from 0.8 to 0.86, indicating an enhancement in the quantum coherence of the ensemble. Our work will contribute to improving the instability and uncertainty of Yb lattice clocks.     

Universal spin-dependent variable range hopping in wide-band-gap oxide ferromagnetic semiconductors

This paper proposes a universal spin-dependent variable range hopping theoretical model to describe various experimental transport phenomena observed in wide-band-gap oxide ferromagnetic semiconductors with high transition metal concentration. The contributions of the `hard gap' energy, Coulomb interaction, correlation energy, and exchange interaction to the electrical transport are considered in the universal variable range hopping theoretical model. By fitting the temperature and magnetic field dependence of the experimental sheet resistance to the theoretical model, the spin polarization ratio of electrical carriers near the Fermi level and interactions between electrical carriers can be obtained.