半导体激光纵向泵浦的光学耦合系统设计

提出了半导体激光泵浦光束在固体增益介质内的加权平均半径是影响泵浦效率的主要参数；分析了泵浦光束尺寸、椭圆率与斜率效率和阈值的关系。从分析模式匹配理论出发，提出了光学耦合系统的设计和调整应满足的条件，最后对棱镜扩束耦合系统进行了详细计算和简单的实验研究。     

Invariant integral and statistical equations of paraxial light beam transmission in free space

The statistical behavior of arbitrary paraxial light beams propagating in free space is investigated by using the Hermite-Gaussian expansion method and Fock’s representation. A series of equivalent Gaussian parameters for paraxial beam and the statistical equations for these parameters are presented. The optical transmission problem in quasi-far field region is studied. The so-called general Hermite-Gaussian beam is defined. Project partly supported by the National Hi-tech Inertial Confinement Fusion Committee, the Natural Science Foundation of Guangdong Province, the Postdoctoral Foundation of China and Guangdong Province.     

可单向和双向运转的自锁模掺钛蓝宝石环形激光器

首次报道了采用六镜环形腔结构的掺钛蓝宝石激光器，该激光器既可以实现自锁模的单向运转，也可以实现自锁模的双向同时运转。     

痕量铂的在线罗丹宁螯合纤维预富集电感耦合等离子体发射光谱法测定研究

本文利用罗丹宁整合纤维作柱材料，研究在线富集电感耦合等离子体发射光谱联用测定痕量铂的分析方法。含Pt的2mol/L HCl溶液流经罗丹宁螯合纤维柱后，所螯合的铂先由含5％硫脲的4mol/L HAc活化，继而被10％HCl（V/V)洗脱。上柱、淋洗及洗脱均由自动在线预富集装置所控制。试验了罗丹宁纤维吸附铂的条件及各种困素包括上柱酸度和流速、洗脱液组成和流速、共存物等的影响。与常规方法比较，8mL上柱体积的富集倍数为6．8倍，检测限降低5倍。     

Thermo/pH Dual Responsive Mixed‐Shell Polymeric Micelles Based on the Complementary Multiple Hydrogen Bonds for Drug Delivery

Thermo/pH dual responsive mixed‐shell polymeric micelles based on multiple hydrogen bonding were prepared by self‐assembly of diaminotriazine‐terminated poly(?‐caprolactone) (DAT‐PCL), uracil‐terminated methoxy poly(ethylene glycol) (MPEG‐U), and uracil‐terminated poly(N‐vinylcaprolactam) (PNVCL‐U) at room temperature. PCL acted as the core and MPEG/PNVCL as the mixed shell. Increasing the temperature, PNVCL collapsed and enclosed the PCL core, while MPEG penetrated through the PNVCL shell, thereby leading to the formation of MPEG channels on the micelles surface. The low cytotoxicity of the mixed micelles was confirmed by an MTT assay against BGC‐823 cells. Studies on the in vitro drug release showed that a much faster release rate was observed at pH 5.0 compared to physiological pH, owing to the dissociation of hydrogen bonds. Therefore, the mixed‐shell polymeric micelles would be very promising candidates in drug delivery systems.     

小鼠体外T淋巴细胞集落形成的研究

本文建立了一种改良的适于小鼠脾脏淋巴细胞形成 T 细胞集落的微量甲基纤维素半 固体培养系统.先将脾脏有核细胞含有m l) 的液相中培养 24 小时,然后收集非粘附细胞,将其接种到含甲基纤维和 15 % Co nA一L C M 的半固体系统中培养,细胞的终浓度为.以上培 养 条件是通过正交设计试验所获得的最优组合,可获得高集落形成率.本文还对集落形成细 胞 的性质和集落生长的动力学进行了讨论     

The Monotonicity of the Linear Complementarity Problem

The monotonicity of the linear complementarity problem (LCP) is discussed in this paper. Both the monotone property about the single element of the solution and the monotone property of the whole solution are presented. In order to illustrate the results, some corresponding numerical experiments are provided.     

Preparation of Novel Silica Nanoparticles with Controllable Fluorescence Intensity from Porphyrin-Bridged Silsesquioxane

A method for the fabrication of an improved class of controllable fluorescence intensity, highly sensitive and photostable porphyrin doped silica nanoparticles (PDSNPs) was demonstrated. The fluorescence intensity of PDSNPs could be controlled by finely tuning self‐dissociated time of the precursor of porphyrin‐bridged silsesquioxane. Porphyrin was well dispersed into the silica matrix due to the covalent attachment in the system, thus entirely avoiding the porphyrin leakage and fluorescence quenching effects. The resultant PDSNPs with a narrow size‐distributed region and a regular spherical structure can be attained.     

Effects of speaker variability and noise on Mandarin fricative identification by native and non-native listeners

Speaker variability and noise are two common sources of acoustic variability. The goal of this study was to examine whether these two sources of acoustic variability affected native and non-native perception of Mandarin fricatives to different degrees. Multispeaker Mandarin fricative stimuli were presented to 40 native and 52 non-native listeners in two presentation formats (blocked by speaker and mixed across speakers). The stimuli were also mixed with speech-shaped noise to create five levels of signal-to- noise ratios. The results showed that noise affected non-native identification disproportionately. By contrast, the effect of speaker variability was comparable between the native and non-native listeners. Confusion patterns were interpreted with reference to the results of acoustic analysis, suggesting native and non-native listeners used distinct acoustic cues for fricative identification. It was concluded that not all sources of acoustic variability are treated equally by native and non-native listeners. Whereas noise compromised non-native fricative perception disproportionately, speaker variability did not pose a special challenge to the non-native listeners.