自组建激光干涉仪测量平行板楔角

在光学实验平台上组建激光干涉仪,给出了测量微小楔角的原理和测量方法,导出了测量公式并进行了实际测量.     

纳米磷酸铁锂的制备及电化学性能研究

利用液相沉淀法合成了纳米级磷酸铁,并以此为铁源,通过碳热还原技术制备了粒径均匀的纳米级球形LiFePO4/C正极材料。经热分析(TG-DSC)、X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)以及恒电流充放电测试,研究了纳米磷酸铁及纳米磷酸铁锂材料的结构、形貌以及电化学性能。实验结果表明材料的首次放电比容量达161.8 mAh.g-1(0.1C),库仑效率为98.3%;室温下在0.2C、0.5C、1C、2C及5C倍率充放电其首次放电比容量分别为156.5、144、138.9、125.6和105.7 mAh·g-1,材料具有较好的倍率性能。     

Chaos in a Bose-Einstein condensate

It is demonstrated that Smale-horseshoe chaos exists in the time evolution of the one-dimensional Bose-Einstein condensate driven by time-periodic harmonic or inverted-harmonic potential.A formally exact solution of the time-dependent Gross-Pitaevskii equation is constructed,which describes the matter shock waves with chaotic or periodic amplitudes and phases.     

高效液相色谱法测定灭蟑膏中氯蜱硫磷

建立了灭蟑膏中1%氯蜱硫磷的超声萃取前处理方法和高效液相色谱分析方法。考查了萃取温度和萃取时间对萃取量的影响。采用μBondapak C18(150 mm×3.9 mm,5μm)色谱柱;以乙腈、水、冰乙酸的体积比为82∶17.5∶0.5为流动相;流速1.0 mL.min-1;检测波长280 nm。相对标准偏差为1.8%,回收率在97%~105%之间。     

Direct phase control method for binary phase-shift keying space coherent laser communication

An optical phase locking method based on direct phase control is proposed. The core of this method is to synchronize the carrier by directly changing the phase of the local beam. The corresponding experimental device and the supporting algorithm were configured to verify the feasibility of this method. Phase locking can be completed without cycle skipping, and the acquisition time is 530 ns. Without an optical preamplifier, a sensitivity of-34.4 d Bm is obtained, and the bit error rate is10^...     

应用于EEPROM的超薄SiO2 TDDB特性的研究

阐述了应用于EEPROM中的超薄隧道氧化层随时间的击穿特性。比较和分析了不同的可靠性测试方法，并对超薄氧化层生长工艺的优化进行了探讨。