一种提高无线实时低传输率下传输图像质量的方法

设计并实现了一种提高无线信道中传输基于MJPEG2000格式的实时图像质量的方法,图像的压缩与解压缩采用专用硬件ADV212实现,通过配置ADV212芯片自身的寄存器实现跳场,利用FPGA实现补场,在信道速率较低的情况下,能够有效地提高传输后图像显示的质量。     

涵闸的水流特性及其对钉螺扩散的影响

为寻求消灭涵闸水流中钉螺的有效方法,从而控制血吸虫病的蔓延.采用ADV流场测量技术对涵闸水槽中的流场结构进行了精细测量;运用标准κ-ε紊流模型和有限体积法建立的数学模型对模型水槽中的流场结构进行计算并得出其流场结构,从实验和数值计算两方面对比分析得出了涵闸的水流特性,总结出涵闸对钉螺扩散的影响规律;结果表明:单纯涵闸不但不能起到阻螺的效果,而且还会引起钉螺在涵闸周围孳生扩散,涵闸首尾部是钉螺孳生的重要部位,应采取措施重点灭螺.     

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 15 wt% drug entrapment efficiency （EE） and 3 wt% 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.     

ADV7181的I2C配置接口的SOPC实现

研究一种基于SOPC的ADV7181的I2C配置接口的设计方案,该设计利用数字系统设计自动化技术实现了全硬件结构的I2C配置接口的功能.系统具有集成度高、稳定性好、设计灵活和设计效率高等优点.     

基于ADV601的数字图像压缩方案

介绍一种基于ADV601芯片的视频压缩及解压缩方案，并介绍了该方案所用的3种主要芯片的结构、特点及它们在此方案中的作用、应注意的问题。     

灵敏电流计内阻测定方法的研究

针对半偏法测定灵敏电流计内阻存在的缺点,提出了用变偏法测定电流计内阻的一种方法。     

Real-time video compression system design and hardware implementation based on multiple ADV212

In order to improve the transmission rate of the compression system , a real-time video lossy compression system based on multiple ADV 212 is proposed and achieved .Considering the CMOS video format and the working principle of ADV 212 , a Custom-specific mode is used for various video formats firstly .The data can be cached through the FPGA internal RAM and SDRAM Ping-Pong op-eration.And the working efficiency is greatly promoted .Secondly, this method can realize direct code stream transmission or do it after storage .Through the error correcting coding , the correction ability of the flash memory is highly improved .Lastly, the compression and de-compression circuit boards are involved to specify the performance of the method .The results show that the compression system has a real-time and stable performance .And the compression ratio can be changed arbitrarily by configuring the program .The compression system can be realized and the real-time performance is good with large amount of data .     

黄海潮流底边界层内湍动能耗散率与底应力的估计

利用高频流速仪ADV在青岛外海潮流底边界层内一个周日(25h)定点连续观测的三维流速资料,计算并分析了秋末冬初潮流占优的陆架浅海潮流底边界层内湍动能耗散率和底应力的特征及其潮内变化.结果表明:(1)秋末的黄海,在一个周日内湍动能耗散率与底应力的变化范围分别为1.8×10-8—3.4×10-5W.kg-1与6.6×10-4—7.5×10-1N.m-2,表明在底边界层内存在着很强的能量耗散,且湍动能耗散率与底应力在潮内的变化都非常显著;(2)在充分混合的潮流底边界层内,湍流主要由海底流速剪切生成,湍动能生成与耗散基本处于局地平衡状态;(3)对于半日潮流占优的海区,湍动能耗散率与底应力都具有明显的四分之一周日的变化规律;(4)观测期间,海底以上0.45m处的拖曳系数的平均值Cd(0.45)为0.0017(对应于海底以上1.0m处的拖曳系数的平均值Cd(1.0)为0.0015),但拖曳系数存在着显著的变化(变化范围为0.0005—0.0082);平均的海底粗糙度为2.8×10-5m.