世界原油质量趋势及我国面临的挑战

评述了世界原油质量趋势、我国重质油现状以及我国加工含硫原油的现状和前景。     

Layered Wyner-Ziv video coding.

Following recent theoretical works on successive Wyner-Ziv coding (WZC), we propose a practical layered Wyner-Ziv video coder using the DCT, nested scalar quantization, and irregular LDPC code based Slepian-Wolf coding (or lossless source coding with side information at the decoder). Our main novelty is to use the base layer of a standard scalable video coder (e.g., MPEG-4/H.26L FGS or H.263+) as the decoder side information and perform layered WZC for quality enhancement. Similar to FGS coding, there is no performance difference between layered and monolithic WZC when the enhancement bitstream is generated in our proposed coder. Using an H.26L coded version as the base layer, experiments indicate that WZC gives slightly worse performance than FGS coding when the channel (for both the base and enhancement layers) is noiseless. However, when the channel is noisy, extensive simulations of video transmission over wireless networks conforming to the CDMA2000 1X standard show that H.26L base layer coding plus Wyner-Ziv enhancement layer coding are more robust against channel errors than H.26L FGS coding. These results demonstrate that layered Wyner-Ziv video coding is a promising new technique for video streaming over wireless networks.     

实时Motion JPEG2000视频编码系统设计

介绍了基于ADV202 JPEG2000编码芯片的Motion JPEG2000视频编码系统,该系统可实现SMPTE274M的实时编码,支持失真/无失真编码,与标准完全兼容.给出了系统硬件结构和软件流程设计,提出了一种利用帧间相关性减少编码计算量的码率控制方法.     

提高EDA实验教学质量的实践与探索

介绍了一种在教学实践中总结出的行之有效的实验教学实施方式。一方面，将EDA实验教学过程分为实验预习、实验和总结提高三个阶段，为每个阶段规定了任务和要求。另一方面，为确保实验教学质量，需要明确实验任务，严格考核标准，做好讨论与总结。另外还讨论了网站等手段在EDA实验教学中的作用。     

Gamma-irradiation-induced Ag/SiO2 composite films and their optical absorption properties

Small Ag particles or clusters dispersed mesoporous SiO₂ composite films were prepared by a new method: First the matrix SiO₂ films were prepared by sol-gel process combined with the dip-coating technique, then they were soaked in AgNO₃ solutions followed by irradiation of γ-ray at room temperature and in ambient pressure. The structures of these films were examined by X-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), and optical absorption spectroscopy. It has been shown that the Ag particles grown within the porous SiO₂ films are very small, and they are isolated and dispersed from each other with very narrow size distributions. With increasing the soaking concentration and an additional annealing, an opposite peakshift effect of the surface plasmon resonance (SPR) was observed in the optical absorption measurements.     

含辣椒碱的抗菌高吸水树脂的合成

以过硫酸铵、亚硫酸氢钠作引发剂，N，N’-亚甲基双丙烯酰胺作交联剂，将木薯淀粉与丙烯酸、辣椒碱在水溶液中接枝共聚，合成了具有抗菌性的高吸水性树脂。考察了添加辣椒碱形式、反应温度、反应时间、丙烯酸中和度、引发剂和交联剂用量对产物吸水性能的影响，结果表明，添加辣椒碱提取母液，在70℃下反应2．5h，丙烯酸中和度85％，引发剂和交联剂用量分别为0．6％和0．04％时，合成的吸水树脂有较高的吸水倍率。     

光通信技术发展的新亮点

自光通信问世以来，经历了研究探索、实用化、推广应用、快速发展等时期，直至2001年，达到急剧发展的高潮。随着世界经济的滑坡，通信行业的不景气，使光通信也进入了寒冷的冬天。实际上，即使在经济低速的时期，光通信的技术依然没有停止发展，而且出现了不少继续将光通信推向前进的新亮点。从技术和应用的角度，简要介绍一些光通信的新技术。     

分布式光纤拉曼放大器的增益平坦设计

介绍了在波分复用（WDM）系统中分布式光纤拉曼放大器（FRA）的理论分析模型。在此基础上，对增益平坦设计所需考虑的因素进行了分析；最后通过试验证明了它的有效性。     

欠平衡钻井过程中的井控新设备

文章简述了欠平衡钻井中不压井操作的设备和方法,介绍了威得福公司的井下套管阀和海底泥浆举升钻井工业联合项目在深水钻井中研发的新钻杆阀在欠平衡钻井中的应用。通过在钻杆上安装钻杆阀和在套管上安装套管阀解决接单根及起下钻操作时因压井可能破坏欠平衡状态的问题,使全过程的欠平衡钻井得以实现。     

掺杂聚苯胺导电膜的制备及对核设施表面铀的去污

制备了掺杂导电聚苯胺可剥离膜，首次采用涂膜、电解联用去污方法，进行涂膜电解去除渗透到核设施金属材料内部形成氧化物的铀。在膜中，聚苯胺、盐酸、EDTA-2Na含量各为4％、0．5％～1%、1％；电解电压2．3V、电解时间25min～30min时，其去污率可达99％，优于其它的方法。