煤燃烧产生的细微粒子中重金属元素富集性的实验研究

本文详细地研究了燃烧温度，燃烧气氛及煤粉细度对几种有毒重金属的燃烧过程中的行为的影响，发现温度，气氛及煤粉细度对各重金属元素在燃烧中的行为有重要的影响，再从各元素的总量角度研究了燃烧工产史对重金属行为的影响，并比较了不同煤种燃烧时重金属行为的差异。     

电渣重熔技术的新发展

论述电渣重熔技术的新进展 ,主要介绍可控气氛电渣重熔、导电结晶器电渣重熔、快速电渣重熔、电渣重熔 冷壁感应引导等技术 ,这些技术使电渣重熔冶金焕发了新的活力 ,得以进一步的发展。     

复合高温烧结设备

介绍了高温烧结设备的开发 ,描述了哪些工艺步骤可以被结合起来 ,各个独立的部分之间如何工作以及需要考虑的问题     

水冷前烟箱常压卧式中心回焰燃油燃气锅炉的设计

简要介绍了目前常用的常压卧式中心回焰燃泊、燃气锅炉的优缺点，针对锅炉使用过程中出现的前烟箱易过热烧损的问题，充分利用常压锅炉结构灵活的特点，对锅炉的结构在原有基础上进行了改变，摒弃了一贯采用的用耐火材料填充前烟箱的方法，将前烟箱设计成水夹套的形式，并与锅筒联成一体，用锅筒内的循环水对前烟箱进行冷却，整个结构设计简单明了，安全性高，制造工艺简单，解决了前烟箱存在的问题。     

Estimating the irradiance spectrum from measurements in a limited number of spectral bands

Accurate measurement and characterisation of fluctuations in the irradiance environment is important for many areas of optical remote sensing. This paper describes a method of estimating spectral irradiance over the region 400-1000 nm from the radiance of a calibrated reference panel, measured in four narrow spectral bands (FWHM approx. 10 nm). The reproducibility of the method was found to have an average root-mean-squared error of approximately 30 mW m^− 2 nm^− 1 over the region 400-1000 nm when applied to spectra covering a range of clear-sky conditions typical of mid-latitude temperate regions. This was approximately twice as precise as the sequential method, even when the interval between target and reference panel measurements was very short (median interval 23 s). The method provides an alternative to linear interpolation between successive reference panel measurements and is particularly appropriate for conditions when irradiance is varying in a non-systematic way, for example, during the passage of sub-visual clouds.     

大学生创新意识培养初探

就在教学过程中如何培养学生创新意识进行了初步探讨,总结了从教学方法、师生关系和课堂氛围营造三个方面进行学生创新意识培养的的一些尝试。     

双端差分吸收激光雷达及其大气污染测试

本文介绍了以双脉冲双波长可调谐激光器Cr: LiSAF作为光源的双端差分吸收激光雷达系统,利用这一系统对大气中的SO2和NO2污染气体进行定标实验和浓度测试,并给出了测试结果及其分析。     

Liquid hydrogen

It would be helpful were it economically acceptable to liquefy hydrogen. However, methanol is a liquid and could be written CH₄O. The Nobel Laureate, George Olah along with two co-enthusiasts, published a book (2006) entitled “A Methanol ECONOMY”.³ If the methanol is synthesized from hydrogen and CO₂ from the atmosphere, burning it as a fuel would merely replace in the atmosphere the CO₂ taken from it and in the synthesis of the methanol.Let us, therefore, add “LIQUID HYDROGEN”³ to the subdivisions of uses of HYDROGEN.     

Electrical properties and hydrogen flux performance of Sr(Ce0.6Zr0.4)1−xYxO3−δ ceramic proton conductors

In this study, Sr(Ce_0.6Zr_0.4)_1?xY_xO_3?δ (x = 0.1, 0.15, 0.2, 0.25, 0.3, SCZY) perovskite proton-conducting ceramics were synthesized using the citrate-ethylenediaminetetraacetic acid complexing method. The effect of the Y concentration on the crystal structure, electrochemical performance and hydrogen flux of the SCZY samples in air and a H₂ atmosphere were investigated. The sintered SCZY samples showed a main perovskite crystal structure with several SrY₂O₄ impurity phases when x ≥ 0.20. The grain size of SCZY samples when x = 0.25 and 0.30 was smaller than that of other samples. The conductivity of all samples increased as the temperature increased in both air and H₂; however, the conductivity of SCZY in H₂ was lower than that in air. The results of AC impedance, demonstrated that resistance mainly derived from the charge transfer, which was apparently higher than the bulk and grain boundary resistance. Sr(Ce_0.6Zr_0.4)_0.85Y_0.15O_3-δ exhibited low charge transfer resistance in both air and the H₂ atmosphere and had a high hydrogen flux of 0.34 ml min^?1 cm^?2 μm^?1 at 800 °C. The structures of all SCZY samples were stable in 80 °C water.     

Tunable morphology of aluminum oxide whiskers grown by hydrothermal method

Hydrothermal method was used to grow α-Al₂O₃ whiskers by using hydrated aluminum sulfate, urea and poly ethylene glycol as precursors. X-ray diffraction (XRD), selected area electron diffraction (SAED), and high resolution transmission electron microscope (HRTEM) were used to characterize morphology of the whiskers. By increasing the pH of the solution (by adding extra NaOH), by adjusting calcination times and atmospheres it was possible to tune the whiskers morphology and their aspect ratio. Aspect ratio as high as 25 was obtained after hydrothermal treatment of a solution having pH 3 followed by calcination in Ar or N₂ atmosphere at 1200?°C for 6 h.