非线性Mathieu方程1／2亚谐分叉解的实验研究

本文对一类Mathieu方程的1/2亚谐分叉特性进行了实验研究,得出了在整个参数平面上具有不同拓朴结构分叉图的实验曲线,研究了确定非线性系统衰减参数的方法。并对各种特定的物理系统,可能出现的不同拓朴结构的分叉图和所具有的不同参数区域进行了讨论。     

单光束楔形镜云纹干涉法

本文利用单光束楔形镜云纹干涉法代替传统的双光束云纹干涉法进行位移场和应变场的测量.单光束云纹干涉法具有光路简单,不受环境干扰等特点.本文将云纹干涉法的波前理论与近代光学信息技术有机地结合起来,对单光束干涉系统进行了分析,得到了记录的光强和再现的位移应变公式.利用该系统,得到了三点弯矩形梁的全场位移条纹图和应变条纹图.     

Exotic Behaviour of Angular Dispersion of Weakly Bound Nucleus ^17F at Small Angles

The differential cross sections of ^17F and ^17O elastic scattering products on ^208Pb have been measured at the Radioactive Ion Beam Line at Lanzhou （RIBLL）. Two angular dispersion plots of In（ dσ/ dθ ） versus 02 are obtained from the angular distribution of the elastic scattering differential cross sections. The angular dispersion plot exhibits a clear turning point for ^17F in the range of small scattering angles 6°-2° due to its exotic structure, but for ^17O, the turning point is not observed in the same angular range. The experimental results have been compared with previous data of other groups. Systematical analysis on the available data supports the above conclusion that there is an exotic behaviour of the angular dispersion plot of weakly bound nuclei with halo or skin structure as compared with that of the ordinary nuclei near stable line. Therefore the turning point of the angular dispersion plot appears at small angle for weakly bound nuclei with halo or skin structure, and can be used as a new probe to investigate the halo and skin phenomena of weakly bound nuclei.     

图书质量评估定量分析探讨

本文应用数量化理论———成对比较、九级分制和相关分析法,探讨了图书质量评估的问题, 为今后的 图书质量评估实践提供了一些理论依据     

维吾尔文TrueType字型技术

本文介绍了ＴｒｕｅＴｙｐｅ字型技术，在分析ＴＴＦ文件格式的基础上提出了一种制作及转换ＴｒｕｅＴｙｐｅ字型的方法及程序，并描述了维吾尔文ＴｒｕｅＴｙｐｅ字符制作的具体程序及结果。     

Effects of Ti and Co on the Electrochemical Characteristics of MgNi-Based Alloy Electrodes

Mg-based hydrogen storage alloys MgNi, Mg0.9Ti0.1Ni and Mg0.9Ti0.1Ni0.9Co0.1 were successfully prepared by means of mechanical alloying （MA）. The structure and the electrochemical characteristics of these Mg-based materials were also studied. The results of X-ray diffraction （XRD） and scanning electron microscopy （SEM） show that the main phases of the alloys exhibit amorphous structures, and trace of Ni co-exists. The charge-discharge cycle tests indicate these alloys have good electrochemical active characteristics. And the cycle stability of Ti and Co doped alloy was better than that of MgNi alloy. After 50 cycle charge-discharge, the discharge capacity of the Mg0.9Ti0.1Ni0.9Co0.1 alloy was much better than that of MgNi and Mg0.9Ti0.1Ni alloys. The discharge capacity of Mg0.9Ti0.1Ni0.9Co0.1 was 102.8% higher than that of MgNi alloy, and 45.49% higher than that of the Mg0.9Ti0.1Ni alloy. During the process of charge-discharge cycle test, the main reason for the electrode capacity fading is the corrosion of Mg to Mg（OH）2 on the surface of alloys. The Tafel polarization test indicates Ti and Co improve the anticorrosion in an alkaline solution. The EIS results suggest that proper amount of Ti and Co doping improve the electrochemical catalytical activity on the Mg-based alloy surface significantly.     

去氢氨基酸衍生物异构体的高效液相色谱分析

１前言血管紧张素转移酶（ＡＣ巳）抑制剂是治疗高向见的一线约物，其发展速度远远超过其他高血．压治疗药物。本基Ｊ氨酸衍生物是合成ＡＣＥ抑制剂的一种十分有用的前体。在合成该前体的过程中会产生异构体，所以建立测定）一物中各异构体比例的分析方法成为必须。其中这类化合物顺反异构体的测定分析已有报道ｈ’，但顺反异构体、以键异构体「ｕ｝分离测定还未见报道。液相吸附色谱是分离异构体的有效手段ｌ’］，所以本文利）．ｒＪ高效液相吸附色谱进行拆分和测定。所拆分的母基ｈａ酸衍生物的结构为１和２。２实验部分２．１仪器与试剂…     

β-Tosylamino and/3-Hydroxyl Substituted α-Diazocarbonyl Compounds： X-ray Structure and 1,2-Migrations under Photochemical Condition

As a continuation of the investigation on 1,2-migration of metal carbene and free carbene, two X-ray structures of β-substituted α-diazocarbonyl compounds were obtained. The relationship between the structure and 1,2-migratory aptitude was discussed and an exploratory photochemical study of the diazo compounds presented.     

红外波段单光子探测器及其在量子通信领域中的应用

本文简要介绍了红外波段单光子探测器的种类，分析了InGaAs／InP雪崩光电二极管（InGaAs／InPAPD）与超快超导单光子探测器（SSPD）的相关性能，并概述了二者在量子通信中的应用。     

Low Power-Consumption and High Response Frequency Thermo-Optic Variable Optical Attenuators Based on Silicon-on-Insulator Materials

A novel silicon-on-insulator thermo-optic variable optical attenuator with isolated grooves based on a multimode interference coupler principle is fabricated by the inductive coupled plasma etching technology. The maximum fibre-to-fibre insertion loss is lower than 2.2 dB, the dynamic attenuation range is from 0 to 30 dB in the wavelength range 1500-1600nm, and the maximum power consumption is only 140roW. The response frequency of the fabricated variable optical attenuator is about 30kHz. Compared to the variable optical attenuator without isolated grooves, the maximum power consumption decreases more than 220roW, and the response frequency rises are more than 20 kHz.