浅析美国与日本质量管理的差异

美国和日本的质量管理是目前质量管理领域影响最大的两大流派,本文从文化、管理思想、观念、活动、领导作用、教育、质量改进、激励、学习与创新等方面较为深入地分析了它们的特点和异同及其产生的根源,对深入理解质量管理的本质和思想提供了一定的借鉴。     

Quantum speed limit time of a two-level atom under different quantum feedback control

We investigate the quantum speed limit time(QSLT) of a two-level atom under quantum-jump-based feedback control or homodyne-based feedback control. Our results show that the two different feedback control schemes have different influences on the evolutionary speed. By adjusting the feedback parameters, the quantum-jump-based feedback control can induce speedup of the atomic evolution from an excited state, but the homodyne-based feedback control cannot change the evolutionary speed. Additionally, the QSLT for the whole dynamical process is explored. Under the quantum-jump-based feedback control, the QSLT displays oscillatory behaviors, which implies multiple speed-up and speed-down processes during the evolution. While, the homodyne-based feedback control can accelerate the speed-up process and improve the uniform speed in the uniform evolution process.     

纳米TiO2的有机酸改性

纳米TiO2粉体独特的光催化作用、颜色效应以及紫外屏蔽等功能使其在汽车工业、防晒化妆品、环保等方面有着广阔的应用前景。未经表面处理的纳米TiO2表面疏油,不易在有机介质中分散,直接影响到TiO2性能的发挥。     

Discord and entanglement in non-Markovian environments at finite temperatures

The dynamic evolutions of the discord and entanglement of two atoms immersed in two independent Lorentzian reservoirs at zero and finite temperatures have been investigated by using the time-convolutionless master-equation method.Our results show that,nonzero temperature can induce the entanglement sudden death and accelerate the decays of discord and entanglement.The discord and the entanglement have different robustness for different initial states and their robustness may change under certain conditions.When both the non-Markovian effect and detuning are present simultaneously,due to the memory and feedback effect of non-Markovian reservoirs,the discord and entanglement can be effectively protected even at nonzero temperature by increasing the non-Markovian effect and the detuning.     

q形变的非谐振子广义偶奇相干态的特性

构造了q形变的非谐振子广义偶奇相干态,并研究了其高阶压缩和高阶反聚束特性.结果表明,广义偶奇q- 相干态都在不同的参数区存在压缩效应,随q变形的增大,偶 q-相干态的高阶压缩效应减弱而奇q- 相干态的高阶压缩效应增强.在一定参数范围内,广义偶q- 相干态出现高阶(N≥2) 反聚束特性而广义奇q- 相干态则出现聚束效应.随 q形变增大,广义(偶) q- 相干态的高阶反聚束(聚束) 效应都增强.     

阐释学视角下的斯坦纳译者主体观——以《吉檀迦利》为例谈译者主体性研究

传统的翻译理论研究往往容易忽略译者的主体性地位。本文试从哲学阐释学理论出发，探讨斯坦纳的阐释学翻译，以关注和审视翻译过程中的译者主体性的发挥。     

Collapse–revival of squeezing of two atoms in dissipative cavities

Based on the time-convolutionless master-equation approach, we investigate the squeezing dynamics of two atoms in dissipative cavities. We find that the atomic squeezing is related to initial atomic states, atom–cavity couplings, nonMarkovian effects and resonant frequencies of an atom and its cavity. The results show that a collapse–revival phenomenon will occur in the atomic squeezing and this process is accompanied by the buildup and decay of entanglement between two atoms. Enhancing the atom–cavity coupling can increase the frequency of the collapse–revival of the atomic squeezing.The stronger the non-Markovian effect is, the more obvious the collapse–revival phenomenon is. In particular, if the atom–cavity coupling or the non-Markovian effect is very strong, the atomic squeezing will tend to a stably periodic oscillation in a long time. The oscillatory frequency of the atomic squeezing is dependent on the resonant frequency of the atom and its cavity.