激光等离子体空间分辨XUV光谱技术

本文描述了环面镜-掠入射光栅谱仪系统获得激光等离子体空间分辨XUV光谱的原理,系统结构参数和实验结果,并讨论了这种环面镜技术和交叉狭缝技术各自的优缺点。     

Proton-exchanged LiNbO/sub 3/ optical waveguides using stearic acid

Proton-exchanged optical waveguides have been fabricated in z-cut LiNbO/sub 3/ using a new proton source: stearic acid. These waveguides were characterized optically and were found to exhibit a step index profile with Delta n=0.118 measured at 0.633 mu m. The propagation losses were typically around 1.5 dB/cm, and the diffusion constant and the activation energy for the proton-exchange process were measured to be 5*10/sup 6/ mu m/sup 2//h and 69 kJ/mol, respectively.<>     

Ce：Nd：LN晶体的生长及光折变效应的研究

本文报道了Ce:Nd:LN晶体的生长、光折变灵敏度和位相共轭效应,并对光折变的产生机理进行了探讨。     

干涉型光纤传感技术研究

我们研究了利用零差检测技术的光纤Mach-Zehnder干涉仪,相位检测灵敏度达到了2.8×10~(-4)rad。本文将叙述光干涉相位检测的基本原理、实验装置及结果分析。     

Bao—Tio2—Sio2玻璃陶瓷的介电压电和热电性

用在温度梯度场中析晶的方法制备了BaO—TiO_2—SiO_2系统的极性玻璃陶瓷。研究了它们的介电常数,热电系数,厚度伸缩振动机电耦合系数及其温度依赖性。研究表明,这些陶瓷可望成为一类重要的压电和热电材料。     

Wettability of micron/submicron-sized particles in oilsands bitumen characterized by suspension turbidity

Determination of the wettability of micron/sub-micron sized particles remains a great challenge. The present work proposes a new approach to evaluate the particle wettability by measuring the turbidity of particle suspension. The fine solid samples with varying wettability were prepared by hydrothermal treatment of oilsands bitumen at different temperatures. The turbidity of particle-in-toluene suspension was determined and correlated to the particle surface chemical composition, i.e., C/(Al?+?Si). A good linear relationship was observed between particle wettability and suspension turbidity. The results suggest suspension turbidity can be used to characterize the wettability of organically-modified fine solids in oilsands bitumen.     

Regeneration of waste rolling oil via inorganic flocculation-adsorption process

Waste rolling oil (WRO) can be regenerated by inorganic flocculation-adsorption. Ferric hydroxide (Fe(OH)₃) colloid prepared by the double decomposition reaction of FeCl₃ and NaOH was selected as an inorganic flocculant. Fly ash, activated carbon, clay and silica gel were used as adsorbents to treat the WRO. Effects of different treatment conditions on the performance of the recycled oil were investigated. Results indicated that the recycled oil achieved optimum quality under the following conditions: flocculation time, 6?min; temperature, 60?°C; adsorption time, 20?min; and mass ratios of FeCl₃-to-WRO, NaOH-to-FeCl₃ and fly ash-to-WRO of 0.10, 3 and 0.03, respectively. NaOH combined with Fe(OH)₃ effectively removed most macromolecular impurities, organic acids, lipids, and alcohols. Fly ash exerted the best adsorption rate and adsorption effect. In addition, physicochemical properties of the recycled oils were close to those of fresh oil.     

Hydrocarbon accumulation period and geochemical discrimination of gas-bearing properties of deep tight sandstone in Kuqa depression,China

In order to clarify the hydrocarbon accumulation period of deep tight sandstone in Dabei-Keshen area of Kuqa depression, and to develop identification methods of reservoir fluid properties, a series of experiments were carried out. The results show that hydrocarbon inclusions are less distributed, and gaseous hydrocarbon is mainly methane. Hydrocarbon has been continuously charged since 12?Ma in Dabei gas field, and one main period of accumulation took place during 6–4?Ma for Keshen gas field. Late accumulation may limit the application of hydrocarbon inclusions abundance, rock soluble salt components to distinguish reservoir fluid properties. Carbon isotope composition of carbonate cement in tight sandstone is an effective indicator for gas-bearing properties. For gas layer, the carbon isotope is lighter than ?1.5‰ and ?2.5‰ for Dabei and Keshen gas field receptively.     

超声波振动切削系统幅载特性的研究

超声波振动切削是一种新型的复合加工方法，其关键之一是在切削的有载状态下能否保持一定的振幅值，本文就中置式超声波振动切削系统的幅载特性进行了理论和实验研究。     

底部排气弹射程标准化方法初探

讨论了底排弹射程标准化方法所满足的要求，分析了现行底排弹射程标准化方法存在的问题，对底排减阻模型进行了改进，并对试验数据进行了分析处理。