单嘴精炼装置真空室内卷渣水模型研究

本文针对长城特殊厂单嘴精炼装置进行了真空室内加渣精炼的卷渣水模型研究。在试验的基础上，首先讨论了真空室内卷渣现象的工艺过程，然后进一步得出了临界吹气量的表达式。研究结果为工业性生产进一步提高钢的质量打下了基础。     

Investigation on Ballistic Performance of Armor Ceramics against Long-Rod Penetration

A series of depth-of-penetration (DOF) tests are carried out to investigate the ballistic performance of armor ceramics. Based on the experimental results, an improved differential efficiency factor (DEF) is presented, which demonstrates that the general ballistic efficiency index is independent of the ceramic thickness. It is also shown that the density, internal friction, and compression strength of ceramics are crucial factors that affect the ballistic performance of ceramics significantly through the interaction between the long-rod projectiles and thick-tile armor. This article is based on a presentation made in the symposium entitled “Dynamic Behavior of Materials,” which occurred during the TMS Annual Meeting and Exhibition, February 25–March 1, 2007 in Orlando, Florida, under the auspices of The Minerals, Metals and Materials Society, TMS Structural Materials Division, and TMS/ASM Mechanical Behavior of Materials Committee.     

Guest Editors' Introduction: Human-Centered Computing--Toward a Human Revolution

Human-centered computing studies the design, development, and deployment of mixed-initiative human-computer systems. HCC is emerging from the convergence of multiple disciplines that are concerned both with understanding human beings and with the design of computational artifacts.     

A region-based selective optical flow back-projection for genuine motion vector estimation

Motion vector plays one significant feature in moving object segmentation. However, the motion vector in this application is required to represent the actual motion displacement, rather than regions of visually significant similarity. In this paper, region-based selective optical flow back-projection (RSOFB) which back-projects optical flows in a region to restore the region's motion vector from gradient-based optical flows, is proposed to obtain genuine motion displacement. The back-projection is performed based on minimizing the projection mean square errors of the motion vector on gradient directions. As optical flows of various magnitudes and directions provide various degrees of reliability in the genuine motion restoration, the optical flows to be used in the RSOFB are optimally selected based on their sensitivity to noises and their tendency in causing motion estimation errors. In this paper a deterministic solution is also derived for performing the minimization and obtaining the genuine motion magnitude and motion direction.     

10Gbit/s甚短距离传输系统接收模块研究

本文研究了符合OIF—VSR4—01．0规范的甚短距离（VSR）并行光传输系统转换器集成电路，实现了接收部分转换器集成电路中帧同步、8B／10B解码、12路通道去斜移、检错纠错等模块的设计。在Altera的Stratix GX系列的FPGA上实现了接收部分转换器集成电路。仿真分析的结果表明所设计的各个模块能正确的实现接收部分转换器集成电路的功能，给出了仿真结果。     

65钢冶炼浇铸工艺实践

介绍了采用转炉-LF炉-连铸生产65高碳钢的生产工艺，对铸坯质量及相关工序效果进行了分析。生产实践表明，采用的65钢工艺生产是可行的，铸坯质量能满足用户要求。     

转炉冶炼20管坯钢生产实践

介绍了20#管坯钢的生产试验工艺，采取了拉碳法脱碳、钢包底吹氩及喂丝、保护浇铸、合理控制拉速等有效措施，解决了生产中存在的质量问题，为下一步的生产提供了理论和实践依据。     

零功率堆反应性精密调节小型传动系统研制

建立了包括电动推杆机械传动装置、旋转变压器、角位显示器、控制系统、驱动电路等相关内容的小型精密传动系统,在实验室进行了长时间运行考验和传动精度的测量。实验结果表明:小型精密传动系统不仅在体积、传动精度上,同时在控制技术上均能够满足作为零功率堆上反应性连续调节装置的要求。对研制过程做了较详细的阐述。     

第三方物流企业信息化问题研究

探讨了物流信息化的基本概念及其主要内容，并就其对第三方物流企业的作用进行了阐述。最后以安泰物流信息化建设为案例讲述了具体的第三方物流企业信息化建设。     

肝癌门静脉支架植入术对门静脉压力的影响

目的研究肝癌门静脉支架植入术对门静脉压力的影响。方法１２例肝癌门静脉主干癌栓患者依次接受食管胃底曲张静脉栓塞和门静脉支架植入治疗，分别测量曲张静脉栓塞前（P１）、栓塞后（P２）和支架植入后（P３）门静脉主干（PV）、未累及的门静脉分支（PVB）、脾静脉（SV）、肠系膜上静脉（SMV）压力并进行统计学分析。结果PV组P１为（４５．１７±２．２５）cm H ２ O，P２为（４８．３３±２．２０）cm H ２ O（P＜０．０１），P３为（３９．３３±２．４４）cm H ２ O，与P２比较差异有显著性（P＜０．０１）。PVB组P１为（３８．０８±２．９７）cm H ２ O，P２为（３８．８３±２．９４）cm H ２ O（P＞０．０５），P３为（３７．４１±２．３７）cm H ２ O，与P２比较差异无显著性（P＞０．０５）。SV组P１为（４４．６７±２．１３）cm H ２ O，P２为（４８．１７±２．２０）cm H ２ O，（P＜０．０１），P３为（４１．６７±２．２０）cm H ２ O，与P２比较差异有显著性（P＜０．０１）。SMV组P１为（４５．２５±２．２１）cm H ２ O，P２为（４８．４２±２．１９）cm H ２ O（P＜０．０１），P３为（４１．２５±２．２４）cm H ２ O，与P２比较差异有显著性（P＜０．０１）。结论门静脉主干癌栓患者食管胃底曲张静脉栓塞可使门静脉压力升高，门静脉支架植入可降低门静脉压力。