现场光热光谱法研究银电极行为

利用聚偏二氟乙烯(PVDF)热释电膜作为热传感器, 本文首次独立设计了现场光热光谱研究用的电解池, 对电解池的光热信息进行了理论分析, 并用该法研究了碱性溶液中银电极表面氧化层的性质。从光谱的变化证实: Ag表面Ag~2O层的生成与循环伏安曲线上阳极电流增长(约0.22V)同步。类似情况亦发生在AgO层的生成过程。     

多指示剂标记适体探针卡那霉素传感器的电化学行为与分析性能

以三分子亚甲基蓝(MB)标记适体探针为分子识别元件,构建了一种卡那霉素生物传感器。该传感器采用目标物诱导探针构型变化的信号转导机制。以Au-S化学法将适体探针自组装于金电极表面形成稳定的单分子层传感界面,利用交流伏安法和循环伏安法考察了传感过程的基础电化学行为和传感器分析性能。在优化条件下,相比于单分子MB标记,该传感器的界面电活性和电流输出效率获得了明显提升。在PBS中用于目标物卡那霉素检测,检出限为3.3 nmol/L,电流响应平衡时间为15 s,同时具有高选择性、强抗污检测能力和好的平行构建稳定性。该方法检测过程免样品前处理,无需添加辅助试剂。     

Kinetics of Nitrogen Indiffusion in Czochralski Silicon Annealed in Nitrogen Ambient

By means of low-temperature （10 K） Fourier transform infrared absorption spectroscopy, the kinetics of nitrogen indiffusion in Czochralski （CZ） silicon annealed at 1150-1250℃ in nitrogen ambient is investigated. Moreover, the nitrogen diffusivities in CZ silicon at elevated temperatures deduced herein are in good agreement with those previously obtained in float-zone silicon, thus leading to the conclusion that the nitrogen indiffusion in CZ silicon at elevated temperatures is via nitrogen pairs.     

城市公共交通复合系统抗毁性仿真研究

运用复杂网络理论,对以成都市为例的城市公共交通复合系统网络以及两子系统网络进行了相关拓扑特性与抗毁性分析。分析结果显示,以成都市为例的地铁-公交复合网络及其子网络均为具有无标度特性的小世界网络,在L、P两种空间中均表现出随机袭击下的鲁棒性与蓄意袭击下的脆弱性,且节点的抗毁性低于边的抗毁性;同时在相同袭击条件下,复合网络的抗毁性均优于地铁子网络与地面公交子网络。     

The relation between Hardy’s non-locality and violation of Bell inequality

We give an analytic quantitative relation between Hardy’s non-locality and Bell operator. We find that Hardy’s non-locality is a sufficient condition for the violation of Bell inequality, the upper bound of Hardy’s non-locality allowed by information causality just corresponds to Tsirelson bound of Bell inequality and the upper bound of Hardy’s non-locality allowed by the principle of no-signaling just corresponds to the algebraic maximum of Bell operator. Then we study the Cabello’s argument of Hardy’s non-locality (a generalization of Hardy’s argument) and find a similar relation between it and violation of Bell inequality. Finally, we give a simple derivation of the bound of Hardy’s non-locality under the constraint of information causality with the aid of the above derived relation between Hardy’s non-locality and Bell operator.     

Entanglement Fidelity as a Measure of Preservation of Entanglement in Local Noisy Process

A new formula of entanglement fidelity has been introduced, which can serve as a measure of the preservation of entanglement between two initially entangled subsystems exposed to local noisy environments. For a simple model we derive analytic expressions of concurrence and entanglement fidelity and draw the relationship between them. We find that such entanglement fidelity exhibits the behavior similar to that of the concurrence in quantum evolutions.     

鼻黏膜纤毛显微内窥镜光学系统设计

为了实现从前鼻孔进镜对鼻黏膜表面进行直接显微成像，从而进行无创性观察和测量在体鼻纤毛运动，设计了一种能够分辨鼻纤毛，并且带有30°视向角的变倍硬性显微内窥镜。所设计的硬性内窥镜系统物方数值孔径为0.15，分辨率为272 lp/mm，工作距离为3.00 mm，视向角为30°，物面高度为0.40 mm，系统总长度为205.62 mm，物方口径为4.65 mm，放大倍率为6×～10×。此鼻黏膜纤毛显微内窥镜将可以避免取材造成的纤毛功能损害和受试者痛苦，极大地提高纤毛相关疾病的临床诊断能力，成为助益纤毛领域科研和临床工作的重要突破。