格兰-汤普森棱镜胶合层的膜效应分析

将格兰-汤普森棱镜两半块之间的光学胶合层作为一层薄膜,利用薄膜光学理论,分析了胶合层对棱镜透射比的影响。通过研究胶合层的厚度以及光学胶折射率对入射光在胶合界面上反射率的影响,得出了s偏振光经过格兰-汤普森棱镜后的透射比。结果表明：胶合层的厚度以及光学胶折射率对棱镜的透射比均有影响,且厚度对棱镜透射比的影响呈现周期性变化;而光学胶折射率则对透射比的振荡幅度产生影响。以长度孔径比为3的格兰-汤普森棱镜为例,光学胶折射率为1．510时,棱镜的透射比在92．5％～90．8％之间振荡;光学胶的折射率在接近e光主折射率1．475～1．495之间取值时,棱镜透射比的振荡幅度较小。这一结果有利于对格兰-汤普森棱镜性能的优化。     

生态水泥

介绍了生态水泥的新概念,并对城市垃圾、污泥等废弃物的处理现状、生态水泥的生产工艺和国内外生态水泥的现状进行了论述.用城市垃圾和污泥来生产生态水泥拓宽了原材料来源,减少了天然资源的消耗,降低了水泥生产的成本,是一条很有前途的、有利于水泥工业可持续发展的途径.     

油水井水泥环在冲击载荷作用下的损伤分析

冲击整形扩径工艺是修复油水井套管损坏的常用技术,根据冲击整形的施工工艺和波动理论,建立了套损局部位置处水泥环的损伤力学模型,以有限变形理论为基础,采用悬臂梁力学模型,分段研究了冲击整形时钻杆屈曲的平衡位形及对套管、水泥环产生的冲击力. 结合水泥环的应力状态, 根据脆性材料的Mazars损伤模型,建立了水泥环的损伤力学模型. 并分析了水泥环的损伤状态. 通过与现场测试结果对比,理论计算与实测结果误差在2.7%左右.     

水泥砂浆石在准一维应变下的动态力学性能研究

以改进的SHPB被动围压试验方法 ,研究了水泥砂浆石在准一维应变下的动态力学响应。分析讨论了试验结果与围压套筒材料性质、几何尺寸等的关系。得到了水泥砂浆石的动态泊松比、动态杨氏模量、动态压缩强度。分析了试验中的摩擦力效应及其对围压下轴向应力应变关系的影响 ,完成了对材料弹性常数的修正。     

胶结充填计算机自动控制系统的研制

研制了一套用于矿山开采胶结充填生产工艺的计算机自动控制系统．介绍了该系统的工作原理，硬件电路组成，软件结构框图，以及系统的抗干扰措施、特点和功能．实践证明，该系统控制精度高，调节速度快，工作稳定可靠．     

大口径,高精度光学透镜的光胶工艺技术

介绍大口径，高精度光学透镜光胶我对光学元件的技术要求，光胶环境要求，光胶的偏心调整原理及工艺技术方法，并给出实验结果。     

Application of time series analysis and modern control theory to the cement plant

Cement plant process is full of internal noise sources and feedback loops. Therefore, statistical approach is required to understand its dynamic characteristics. Time series analysis has been applied to some important subprocesses of a cement plant process. These are the vertical mill process, calcining process and clinker cooling process. Based on the AR models of these, a set of optimum controllers have been designed by modern control theory. Successful results of application are reported in this paper. A method of determining optimal production level is also discussed.     

USE OF CONSTRUCTION AND DEMOLITION WASTES AS RAW MATERIALS IN CEMENT CLINKER PRODUCTION

The aim of the present paper was to investigate the possibility of utilizing Construction and Demolition （C＆D） wastes as substitutes of Portland cement raw meal. The C＆D wastes that were so used, were the Recycled Concrete Aggregates （RCA） and the Recycled Masonry Aggregates （RMA） derived from demolished buildings in Attica region, Greece. RCA and RMA samples were selected because of their calcareous and siliceous origin respectively, which conformed the composition of the ordinary Portland cement raw meal. For that reason, six samples of cement raw meals were prepared： one with ordinary raw materials, as a reference sample, and five by mixing the reference sample with RCA and RMA in appropriate proportions. The effect on the reactivity of the generated mixtures, was evaluated on the basis of the free lime content （fCaO） in the mixtures sintered at 1350℃, 1400℃ and 1450℃. Test showed that the added recycled aggregates improved the burnability of the cement raw meal without affecting negatively the cement clinker properties. Moreover, the formation of the major components （C3S1 C2S1 C3A and C4AF） of the produced clinkers （sintered at 1450℃） was corroborated by X-Ray Diffraction （XRD）.     

Thermokinetic analysis of the hydration process of calcium phosphate cement

A microcalorimeter (Setaram c-80) was used to study the thermokinetics of the hydration process of calcium phosphate cement (CPC), a biocompatible biomaterial used in bone repair. The hydration enthalpy was determined to be 35.8 J g^–1 at 37.0°C when up to 80 mg CPC was dissolved in 2 mL of citric buffer. In the present study, parameters related to time constants of the calorimeter were obtained by fitting the recorded thermal curves with the function θ=Ae^–?t(1– e^–?2t). The real thermogenetic curves were then retrieved with Tian function and the transformation rate of the hydration process of CPC was found to follow the equation α=1–[1–(0.0075t)³]³. The microstructures of the hydrated CPC were examined by scanning electron microscopy. The nano-scale flake microstructures are due to crystallization of calcium phosphate and they could contribute to the good biocompatibility and high bioactivity.     

水溶性聚合物改性水泥的研究I.水溶性聚合物改进水泥流动性

制备了水解聚丙烯酰胺（ＨＰＡＭ）、磺甲基化聚丙烯酰胺（ＳＰＡＭ）及磺化聚苯乙烯（ＳＰＳ）等几种水溶性聚合物。研究了水溶性聚合物的种类、阴离子度、分子量、表面活性、掺量、ｐＨ值等因素对水泥净浆流动性的影响。结果表明阴离子聚合物及适中的阴离子度、分子量、掺量、ｐＨ值有利于水泥的分散，从而改善水泥的流动性。聚合物的电荷保护作用是影响水溶性聚合物改性水泥分散的主要因素。提出了聚合物分散水泥粒子与分子链性质相关的作用机理。