重油催化裂化反应技术的新进展

近十几年来，重油催化裂化技术作为主要的重质油轻质化手段得到了迅速发展，国内外围绕催化裂化装置的提升管反应器也开发了许多新技术。综述了重油催化裂化反应技术的新进展，并对新技术的开发进行了讨论。     

Study of Desorption Agent for LADS Process

This article refers to the procedure for selection, evaluation and development of the LADS-D desorption agent associated with the LADS-A adsorbent used in the non-hydroprocessing adsorptive desulfurization (LADS) process for FCC naphtha developed by LPEC Refining Research Institute. The LADS-D desorption agent can effectively remove the sulfides adsorbed on the LADS-A adsorbent. The saturated LADS-A adsorbent can be instantly regenerated by the LADS-D desorption agent to recover its adsorption activity. The LADS-D desorption agent can not only effectively remove all impurities adsorbed on the adsorbent, but also has strong ability to dissolve the impurities to keep a stable desorption efficiency of adsorbent to be basically commensurate with fresh adsorbent after extended use.     

中国先进研究堆冷中子源核发热和冷中子增益研究

为准确计算和研究中国先进研究堆（CARR）冷中子源装置氢系统的核发热和冷中子增益，建立了一整套计算方法。对参考堆的验证计算证明了该方法的正确性和有效性。对影响CARR冷中子源核发热和冷中子增益的各种因素（如慢化剂、冷包材料、冷包形状等）进行了计算和优化选择。结果表明：在核发热量较小的条件下获得了较好的冷中子增益。     

2×750 m3高炉冷风保安系统

介绍了2×750m3高炉冷风保安系统工艺流程、设计选型计算、可行性分析及实施效果。     

防止大型筒类薄壁件冷裂的工艺措施

采取了加强铸件薄弱断面处强度和提高砂芯整体“宏观”退让性八项工艺措施，有效地防止大型筒类薄壁件冷裂纹缺陷     

莱钢冷轧轧机弯辊控制系统分析

对莱钢冷轧六辊单机架的弯辊系统进行研究与分析,介绍板形控制系统的原理和使用效果。     

SAS数据挖掘在冷轧酸洗卷质量缺陷分析中的应用

数据挖掘作为一种发现大量数据中潜在信息的数据分析技术,受到各界的密切关注。SAS数据挖掘技术是众多数据挖掘方法中的佼佼者,它在大型企业中得到很好的应用。本文介绍数据挖掘的背景知识,并利用SAS/EM工具,对该技术在冷轧酸洗卷质量缺陷原因分析作了初步尝试。     

Fabrication of Nano-TiO2 Coating for Dye-Sensitized Solar Cell by Vacuum Cold Spraying at Room Temperature

Deposition of nanocrystalline TiO₂ coating at low temperature is becoming more attractive due to the possibility for continuous roll production of the coating for assembly lines of dye-sensitized solar cell (DSC) at a low cost. In this study, porous nano-TiO₂ coating was deposited by vacuum cold spraying (VCS) at room temperature on a conducting glass substrate using commercial P25 nanocrystalline TiO₂ powder. The microstructure of TiO₂ coating was characterized by field emission scanning electron microscopy (FESEM) and nitrogen adsorption test. A commercial dye (N719) was adsorbed on the surface of TiO₂ particles within the coating to assemble a DSC. The cell performance was evaluated by employing simulated solar light at an intensity of 100 mW/cm². The results showed that TiO₂ coating was deposited by the agglomerates of nano-TiO₂ powders. The Brunauer-Emmett-Teller (BET) test of the as-sprayed TiO₂ coating yielded a porosity of 49% and an average pore size of 17 nm. The assembled solar cell yielded a short-circuit current density of 7.3 mA/cm² and an energy conversion efficiency of 2.4%. The test results indicate that VCS was a promising method to deposit nanocrystalline TiO₂ coatings at low temperature applied to DSCs. This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain Montavon, Ed., ASM International, Materials Park, OH, 2007.     

哈夫曼树的异构部分重复码构造

针对分布式存储系统中数据被访问频率的不同,提出一种基于哈夫曼树的可变重复度的异构部分重复(HVFR)码,将不同访问频率的数据块作为哈夫曼树带有确定权值的叶子节点,构造哈夫曼树并确定数据块的重复度,利用成对平衡设计构造异构部分的重复码,能够提高热数据的并行访问速度和系统存储效率. 性能分析和实验结果表明,与里所码以及简单再生码相比,HVFR码可以显著减少故障节点的修复时间及修复局部性,提高热数据的并行访问速度,达到负载均衡,且计算复杂度低.     

冷切锯片的设计及毛刺抑制试验研究

根据工厂的实际需要研究设计出新型薄壁型钢用冷切锯片.通过工厂试验研究了锯切过程中锯齿磨损、锯切断面毛刺高度和锯切功率的变化规律.在此基础上,综合考虑了锯齿的锋利性、抗冲击性能、耐磨性和切屑容积等因素,对试验锯片进行了反复改进.最终确定的狼牙齿形锯片具有良好的综合性能,能有效的抑制毛刺高度、降低锯切功率、延长使用寿命.特别适用于薄壁型钢的冷态锯切.这种锯片在抑制毛刺生成及延长寿命方面取得较好的效果.