计算全息半色调编码技术的研究

论述了计算全息的基本原理及常用的编码方法，在罗曼型和博奇型编码的基础上，运用空间脉冲调制技术，提出了新型的编码技术－－半色调位相型和标准型编码，半色调型编码用圆形通光孔代替矩形孔，以圆孔面积及位置来记录全息信息，改变了输出模式，减少了编码参数，为全息图的后期作提供了一种新的方法，同时通过理论计算和结果分析分析证明了半色调位相型编码具有和罗曼型同样好的衍射效率，半色调标准型编码具有和博奇型一样大的带宽，但综们的图形数据减少一倍。     

HDTV视频同步与消隐时序控制信号的CPLD设计

ATSC HDTV视频输出采用了SMPTE的相应标准．将像素计数与行计数相结合，采用统计行分类编码的算法对SMPTE274M、SMPTE296M、SMPTE293M和SMPTE295M标准的同步与消隐时序控制信号进行了多平台的仿真分析，并在ALTERA公司的EPM7128上最终实现了本设计．     

EPON上行方向物理编码子层的FPGA实现

目前EPON的物理层(其中包含物理编码子层)在上行方向尚无ASIC芯片可以直接使用，该文提出了EPON物理编码子层在上行方向的设计思想，并用FPGA实现，功能仿真的结果验证了该设计逻辑功能的正确性。     

XT-14型电视信号发生器的改进

在XT-14型彩色电视信号发生器的电路基础上,增加了U分量逐行倒相、色度逐行倒相、非逐行倒相和隔行色度四种编码方式,给出对应电路和调整方法。改进后电视信号发生器效果良好,具有更为广泛的使用范围。     

基于UDP协议的语音传输系统设计及实现

文中讨论了基于UDP协议的语音传输系统的设计及实现。比较详细的阐述了语音信息的录制和播放、发送接收、压缩和解压缩以及语音传输过程的缓冲机制。由于采用了压缩技术，减小了语音信息对网络带宽的要求，故较好的实现了语音信息实时录制、传输和播放。     

IFA诊断巴尔通体感染

目的：了解间接免疫荧光抗体测定法(IFA)的技术路线及其在巴尔通体(Bartonella)诊断中的应用。方法：查阅相关文献，认识IFA的敏感性及特异性、交叉反应。结果：IFA对巴尔通体感染的诊断尤其是在属的水平上的敏感性及特异性均较高。结论：IFA通过抗原抗体的特异性反应而对感染病原作出诊断，尽管有部分交叉反应存在，IFA仍以其高度的敏感性及特异性，以及操作简便而成为诊断巴尔通体感染最实用的方法。     

一种基于SPIHT的分层图像压缩方法

提出一种利用SPIHT算法进行图像分层压缩的编码方法,该方法首先利用图像平滑技术将图像分解为平滑部分和轮廓部分,然后以一定的编码率分别对它们进行编码.实验结果表明,合理分配各层的编码率,能够获得视觉效果比单独采用SPIHT编码更好的编码图像.     

时间选择性莱斯衰落信道条件下的OFDM系统

给出了时间选择性莱斯无线衰落信道条件下一种64—QAM 0FDM系统的理论论证，并给出了仿真结果。首先，对波形形成技术和TCM编码使AWGN(加性高斯噪声信道)条件下的0FDM系统性能得到改善进行了探讨；其次，讨论了COFDM(编码0FDM调制)系统抗时间选择性莱斯衰落性能。选择有效的信道编码和波形形成方法可以得到系统的理想抗衰落性能。     

Advances in identification and application of tumor antigen inducing anti-cancer responses

Tumor antigen is one of the important bases of tumor immunotherapy . With the discovery of novel tumor antigens, interest in specific immunotherapy for treatment of malignancies has increased substantially. Nowadays more and more scientists paid close attention to various tumor antigens with their roles or/and applications in anti-cancer immune responses, immune tolerance, tumor markers,     

N-terminal of L protein of vesicular stomatitis virus contains a new signal sequence

The L protein (241kD) of vesicular stomatitis virus (VSV) is the most important snbnnit of the replication complex. The existence of specific localization signal in the L protein was investigated by making recombinant constructs expressing truncated mutants of the L protein fused to green fluorescent protein (GFP) in transient transfection assays. The chimeric genes encoding varied N-terminal of L and GFP gene were put under the control of T7 promoter or CMV promoter. The fusion proteins were transiently expressed in BHK-21, COS-7, CHO or Hep G2 cells. When more than 120 residues were deleted or only 96 residues were kept on the N-terminal, the fusion proteins were shown to be distributed throughout the cells, cytoplasm and nucleus under the confocal microscope. However, other chimeric proteins with 120 or more amino acids were dotted and distributed in the perinuclear regions. And the fusion protein with 96—120 aa has the similar distribution. A thirteen-residue peptide QGYSFLHEVDKEA (108—120) was identified as localization signal, whose function would be absolutely distributed with the deficiency of D or V. Our results show that there is an independent localizing signal in N-terminal domain of L protein of VSV and this functional signal is conserved in different cell lines.