Characterization of CuInS2 thin films for solar cells prepared by spray pyrolysis

We have made a study of the chemical composition, the electrical, the optical and the structural properties of polycrystalline CuInS₂ thin films prepared by spray pyrolysis to be used for thin film solar cells. These films were deposited starting from aqueous solutions with different chemical compositions ([Cu]/[In] and [S]/[Cu] ratios) and at different substrate temperatures. In all cases, the material is p-type with grains preferentially oriented in the (112) direction of the sphalerite structure. The electro-optical properties show a very strong dependence on the [Cu]/[In] ratio in the solution. Films with copper excess have smaller resistivity and better crystallinity than those which are stoichiometric or have indium excess. The results obtained in this work show the possibility of having CuInS₂ thin films with a wide range of resistivity, a fact that could be important for making solar cells based on this material.     

原料对铁合金冶炼过程的影响

介绍了铁合金冶炼时需要准备的原料，对不合格原料需要进行加工处理，达到合格粒度。并提出了影响铁合金冶炼过程有原料的粒度，配料称量，混合等重要因素。     

纳米塑料研制进展(续)

综述了纳米塑料（包括PE、PP、PVC、PET、PBT、PA）的研制、性能、应用和展望。     

树状大分子/金属纳米复合物的制备与催化作用

综述了一类新的有机/无机杂化纳米材料———树状大分子/金属纳米复合物的制备及其催化作用。树状大分子/金属纳米复合物是以树状大分子为模板或稳定剂,通过还原树状大分子内或树状大分子间螯合金属离子制备。讨论了树状大分子/金属纳米复合物在水、有机溶剂、氟/有机两相溶剂和超临界CO2中的催化作用。     

Enzymatic modification of selected functional properties of myofibril preparation obtained from mechanically recovered poultry meat

The effect of addition of 3 g/L of commercially available transglutaminase preparation to protein extracts obtained from mechanically recovered poultry meat was studied. The content of free thiol groups (–SH), thermal drip and gel texture were determined. After pre-incubation at 7–8 °C for 1, 3, 5 and 24 h, the samples were subjected to one-step heating at 50, 60, 70 and 80 °C and two-step heating at 50/80, 55/80 and 60/80 °C. The addition of preparation and the extension of pre-incubation time led to decrease of free -SH groups content. After heating, the number of thiol groups decreased, the texture was improved, but thermal drip from gels increased. The amount of –SH groups in gel extracts subjected to one-step heating decreased with simultaneous increase of mechanical strength of gels. Protein gels subjected to two-step heating exhibited higher firmness than gels subjected to one-step heating. Thus, the 3 g/L addition of transglutaminase preparation in combination with one-step thermal processing at 70 °C and pre-incubation for 3 h contributed to improvement of texture properties of model gels and low thermal drip.     

基于微机的X射线分析自动测量系统

本文介绍了一个基于微机的X射线分析自动测量系统。该系统有三个基本功能:自动获取数据、自动换样和处理谱数据。     

制备低硫可膨胀石墨的研究

研究了以过二硫酸铵作氧化剂低硫可膨胀石墨的制备，找到了在较低温度下，制备低硫可膨胀石墨的最佳条件。即过二硫酸铵和石墨的重量比为１５％；反应温度为５５℃；反应时间为４０ｍｉｎ；硫酸浓度为９８％；硫酸与石墨的重量比为４∶１，草酸和硝酸（浓度为６５％）的重量比为７．５％时，所制得的可膨胀石墨含硫量为０．６５％，膨胀容积为２００ｍＬ／ｇ可膨胀石墨。并且，其终端产品柔性石墨具有优良的力学性能和抗氧化性能。     

乳状液膜法制备草酸稀土

系统研究了在乳状液膜内水相直接制备草酸稀土的方法，讨论了内水相草酸浓度、表面活性剂浓度、载体浓度、外水相酸度和外水相稀土浓度对迁移率的影响，找到了制备草酸稀土的最佳条件，草酸稀土经灼烧所得的氧化物含ＲＥ２Ｏ３〉９９．５％，与萃取法相比，此方法具有成本低、能耗少、污染程度低的特点，具有工业化前景。     

影响ETM影像土地利用/覆盖分类精度因素的研究

训练样本量、辅助数据和分类法是影响土地利用/覆盖分类精度的3个主要因素,通过找到这3个因素的最佳组合方式以提高分类精度,分别在25%、50%、75%、100%样本量下,加入NDVI、DEM和纹理均值特征作为辅助数据,比较了分类回归树、支持向量机、最大似然法3种分类法的效果,探讨了训练样本、辅助数据以及分类技术对土地利用/覆盖分类精度的影响。结果表明：支持向量机总体分类精度较高,在相同样本量和没有有效辅助数据的情况下,SVM可以获得最佳的分类结果,总体分类精度在85%以上;在进行分类时,加入NDVI和纹理均值特征使分类回归树分类精度提高了2.82%,说明该方法对有效辅助数据的加入较为敏感;在获取的训练样本集有限而可获取有效的辅助数据时,应优先考虑利用分类回归树进行土地利用/覆盖分类。     

智能力敏传感器的研制

针对传统的差压密度计和压力式液位计分别存在可靠性不高、不适用于介质密度经常变化的场合的问题,设计了一种基于Freescale MC9S08AW60微控制器的智能力敏传感器,详细介绍了该传感器主要电路的设计。该智能传感器实现了数据采集、信号处理、数据通信和电流环输出式数模转换功能。实际应用表明,在-20～+80℃的工作温度范围内,密度测量精度可达±5kg/m3,液位测量不受悬浮液回流和液位波动的影响,很好地满足了工业现场的应用。