基于MPEG-4标准的VOD业务探讨

MPEG-4是动态图像专家组(MPEG)标准家庭中的一员，是国际化标准组织为多媒体通信制定的一种解决方案。介绍了MPEG-4支持的新功能和特点，并阐述了MPEG-4的关键技术，在此基础上对MPEG-4在视频点播业务中的应用问题进行了探讨。     

复合多功能通风管道的性能及在空调系统中的应用

详细介绍了复合多功能通风管道的各种性能,并与薄钢板通风管道作了比较,指出了其在空调系系统中的推广应用具有广阔的发展前景。     

SDI接口数字监视设备的设计与实现

介绍了一种对SDV(串行数字视频)信号进行解码的设备设计方案，提出了该系统的总体构架，并对该系统的硬件设计、软件设计进行了全面的论述。设计的产品具有较高的性能价格比，已进入了推广阶段。     

C/C + +源代码风格检测工具的实现

文中给出了评价C／C 源代码风格的规则分类和检查工具的总体结构，阐述了代码检查工具的核心技术——扩展词法分析和扩展语法分析，给出了代码检测工具的应用实例。     

提高中高含水期油井压裂经济效益的方法

为提高葡北油田中高含水期油井压裂经济效益，合理选择压裂井层尤为重要。应用水驱特征曲线预测出油井压裂前可采储量，从而计算出剩余可采储量及可采储量采出程度，通过绘制油井压裂前剩余可采储量及可采储量采出程度与油井压裂后所创经济效益之间关系曲线，寻找出相关规律，进行优选压裂井，再根据精细地质研究成果，在剩余油富集区选择具体压裂层位。经实际应用，取得了较好效果，提高了油井压裂方案符合率，提高了经济效益，进而总结出一套适合葡北油田中高含水期油井压裂选井选层方法，对今后进一步搞好油井压裂增产工作具有指导意义。     

ROI-based Watermarking Scheme for JPEG 2000

A new region of interest (ROI)-based watermarking method for JPEG 2000 is presented. The watermark is embedded into the host image based on the characteristics of the ROI to protect rights to the images. This scheme integrates the watermarking process with JPEG 2000 compression procedures. Experimental results have demonstrated that the proposed watermark technique successfully survives JPEG 2000 compression, progressive transmission, and principal attacks.     

电话防盗报警器

详细介绍了电话通讯技术以及安全报警技术的应用，二者如何有效地结合起来形成综合联网报警系统。分析了HT9200A和MT8870DC的电路结构，及与AT89C51的接口电路。     

Impact of QOS requirements on video coding for ATM networks

The broadband integrated services digital networks (B-ISDN) based on asynchronous transfer mode (ATM) technology can support a wide range of applications such as voice, video, still images, and data. Compression techniques increase the effective bandwidth utilization, but the bursty and asynchronous nature of the traffic can still lead to congestion in the network, and degradation of image quality and quality of service (QOS). Some of the features to provide better coding schemes for ATM networks are layered coding, resynchronization, buffering, interleaved schemes, constrained bit rate due to buffers, encapsulation with the RTP or AAL1 for clock recovery, lapped transforms, motion compensation, and optimal bit allocation for coders based on wavelet transforms. We review various techniques forimage and video coding such as transforms, motion compensation, vector quantization, and subband coding. We outline the impact of the cell loss ratio (CLR), delay and cell delay variation (CDV) on video coding: blocking effects, loss of frame synchronization, motion vectors, and vector quantization codewords. The open problems include tuning coding parameters to the available QOS provided by the network.     

K418B合金细晶铸造整体涡轮真空热处理工艺研究

通过力学性能评估和金相组织观察，研究五种热处理制度，两个周期的试验结果，确定了Ｋ４１８Ｂ合金细晶铸造整体涡轮的真空热处理工艺。