一种新型的双功能氧电极材料——Pb-Sb-Ru焦绿石型复合氧化物的合成及其性能研究

用溶液共沉淀法合成的比表面高、导电性良好的焦绿石型复合氧化物(Pb_2[Ru_(2-s-y)Sb_(?)Pb_(?)]-O_(7-s)),是一种富Pb的氧化物。其良好的导电性来源于Pb、Ru价态的可变性和多种价态的共存。用这种材料制成的多孔电极上得到的氧还原、氧析出稳态极化曲线及寿命实验结果表明,室温下这种氧化物在KOH溶液中,对氧还原及氧析出均具有很好的电催化活性和稳定性。     

高速摄影机数据记录系统研究

同时记录与高速事件相关的信息是进行胶片判读处理的必要条件,数据记录系统就是由高速摄影机的同步控制信号控制选通,将与事件相关的信息经特殊处理,由集成数据点阵头记录在胶片上,为此后的胶片判读及对拍摄事件进行更精细的分析处理提供定量、实时的依据。     

Identification of isomeric amides of itaconic acid by proton magnetic resonance spectroscopy

Two half amides of itaconic acid, ( 1 ) and ( 2 ), have been synthesized and identified by proton magnetic resonance spectroscopy as a preliminary to an interpretation of the mechanism of action of succinate thiokinase on guanosine triphosphate substrates.     

SZS型三位制景摄影机的控制系统

本文介绍了制景摄影机控制系统的主要功能和构成。包括微机实时控制系统和步进电机驱动电源两大部分,并就系统的抗干扰措施作了简要的说明。     

Angular distributions for (3,4)(Lambda)H bound states in the (3,4)He(e,e(')K+) reaction

The (3,4)(Lambda)H and (4)(Lambda)H hypernuclear bound states have been observed for the first time in kaon electroproduction on (3,4)He targets. The production cross sections have been determined at Q(2)=0.35 GeV2 and W=1.91 GeV. For either hypernucleus the nuclear form factor is determined by comparing the angular distribution of the (3,4)He(e,e(')K+)(3,4)(Lambda)H processes to the elementary cross section 1H(e,e K+)Lambda on the free proton, measured during the same experiment.     

High resolution spectroscopy of the 12Lambda B hypernucleus produced by the (e,e'K+) reaction

High-energy, cw electron beams at new accelerator facilities allow electromagnetic production and precision study of hypernuclear structure, and we report here on the first experiment demonstrating the potential of the (e,e'K+) reaction for hypernuclear spectroscopy. This experiment is also the first to take advantage of the enhanced virtual photon flux available when electrons are scattered at approximately zero degrees. The observed energy resolution was found to be approximately 900 keV for the (12)(Lambda)B spectrum, and is substantially better than any previous hypernuclear experiment using magnetic spectrometers. The positions of the major excitations are found to be in agreement with a theoretical prediction and with a previous binding energy measurement, but additional structure is also observed in the core excited region, underlining the future promise of this technique.     

Local structure and tunneling kinetics of ammonium aluminum alum by infrared hole-burning

The title compound, crystallized with a few percent of deuterium, contains some NH(3)D(+) and HOD. At low temperatures, five N-D stretch bands are observed. These belong to two ammonium sites with apparent C(s) symmetry in the low-temperature phase. The N-D bands can be hole-burned with an infrared laser. Burning bands belonging to the A-sites transforms some of them to the higher-energy B-sites. The A- and B-sites probably differ from each other by the arrangement of water and sulfate about the ammonium.     

高功率横流CO2激光器大体积放电研究

详细讨论了脉冲预电离高功横流ＣＯ２激光器的工作特性，研究了一套新型的电极结构，对其放电，注入功率，输出功率等待进行了讨论。实验结果表明，脉冲预电离可以提高高功率横率流ＣＯ２激光器的注入和输出功率，并有效地改善了放电的稳定性和均匀性。