Science Letters： Solid lipid nanoparticles loading adefovir dipivoxil for antiviral therapy

Herein, solid lipid nanoparticles (SLN) were proposed as a new drug delivery system for adefovir dipivoxil (ADV). The octadecylamine-fluorescein isothiocynate (ODA-FITC) was synthesized and used as a fluorescence maker to be incorporated into SLN to investigate the time-dependent cellular uptake of SLN by HepG2.2.15. The SLN of monostearin with ODA-FITC or ADV were prepared by solvent diffusion method in an aqueous system. About 15wt% drug entrapment efficiency (EE) and 3wt% drug loading (DL) could be reached in SLN loading ADV. Comparing with free ADV, the inhibitory effects of ADV loaded in SLN on hepatitis B surface antigen (HBsAg), hepatitis B e antigen (HBeAg) and hepatitis B virus (HBV) DNA levels in vitro were significantly enhanced.     

基于FPGA的TV-VGA设计

基于Altera Cyclone IV E FPGA设计的TV-VGA转换控制器,采用Altera Cyclone IV E FPGA将DVD输入影像信号传输到DE2-115开发板电视译码芯片（ADV7180）,经过译码转换成8位的ITU-R标准接口影像数据传输到Cyclone IV E FPGA,ITU-R 656译码器将亮度与彩度信号分开、做解交错和缩放处理,并将亮度与彩度信号转换成VGA显示的红、绿、蓝影像信号,Cyclone IV E FPGA将影像信号传输到DE2-115开发板的VGA数模转换芯片（ADV7123）,最终实现通过LCD/CRT屏幕播放画面。仿真结果表明该转换控制器设计算法是正确、有效的。     

基于FPGA的视频图像采集系统的设计

以EP2C35为核心处理器,提供了一种可行的实时图像采集系统。介绍了FP-GA在系统中的设计思想和工作内容,此设计集成了采集、存储、显示三大基本功能。针对视频解码芯片ADV7181B,实现了I2C总线配置、ITU656解码、VGA显示模块的设计。结果显示本设计具有速度高、成本低、易于集成等优点。     

基于DSP的智能视频质量诊断模块设计

视频监控系统中大量部署的摄像头为监控系统的运维工作带来巨大挑战。提出了一种基于嵌入式DSP处理器的智能视频质量诊断方案,通过对图像的分析能够自动检测视频信号丢失、图像亮度异常、图像模糊等故障并发出报警信号。