一种声呐仿真系统设计中的舰船辐射噪声仿真方法研究

结合线性预测技术,以AR模型拟合指定功率谱的方法,介绍了基于TMS320LF2407A实现舰船辐射噪声实时仿真的方法,并对仿真结果进行了分析说明.实践证明,对舰船辐射噪声的仿真是成功的.该仿真方法具有计算过程简单,仿真精度高的特点,更适合于工程应用.     

相机视频图像自适应对比度增强系统的研制

介绍了基于图像处理方法的自适应对比度增强系统的组成、工作原理、硬件电路设计与软件设计.针对监察相机工作环境照度变化范围大的特点,提出一种改进的灰度直方图均衡化方法.应用此方法所研制的系统,能够自适应于多种光照条件下获得的低对比度图像,自动进行对比度调整,改善监察相机输出视频图像的质量.对于清晰图像,经调整后图像质量至少无明显降低.     

Experimental study on cyclosporine A drug delivery system in prevention of posterior capsule opacification after intraocular lens implantation in rabbits

Objective To study the effect of cyclosporine A drug delivery system (CsA-DDS) on the prevention of posterior capsule opacification (PCO) after experimental intraocular lens implantation in rabbit eyes. Methods Twenty healthy New Zealand white rabbits, whose left eyes and right eyes were used respectively as experiment eyes and controls, were subjected to extracapsular lens extraction and artificial lens implantation. During the operation, CsA-DDS with poly (lactideco-glycolide) as carriers or empty DDS was implanted in the capsular bag for the experimental eyes and controls respectively. After the operation, anterior chamber reaction, intraocular pressure (IOP) and CsA concentration were monitored and twelve weeks after the operation, the eyes were extracted for histopathological and morphological examinations. Results There were no differences between the two groups in conjunctival congestion,IOP change and anterior chamber reaction. PCO was less severe in the experimental eyes than in the controls. Light microscopy revealed that posterior capsular membrane in the experimental eyes was slick, with no obvious proliferation,whereas in the controls, there were lens epithelial cell proliferation and cortex regeneration of different degrees.Morphological examination with electron microscope showed that in the experimental eyes, lens epithelial cells did not function actively and apoptosis occurred, whereas in the controls, epithelial cells presented active function. No marked ultrastructural changes were found in either group. Conclusion Cs-DDS can inhibit PCO after intraocular lens implantation in rabbit eyes and does not have toxic effects on the surrounding ocular tissues. Therefore, it has a good potential for clinical use in prevention of PCO.     

船用扭矩仪超小型A/D转换器的应用

本文详细阐述了作为船用扭矩仪的核心部件A/D转换器,超小型A/D转换器ADS1110可替代传统发射机的模拟电压频率变换器.拓展了广阔的实船扭矩测量应用前景.ADS1110是精密的连续自校准模/数A/D转换器,带有差分输入和高达16位的分辨率,封装为小型SOT23-6片内2.048V的基准电压提供范围为2.048V的输入差分电压.ADS1110使用可兼容的I2C串行接口适合于2.7V至5.5V的低单电源下工作.     

油田流动污水介质中溶解氧对A3钢腐蚀行为的影响

通过腐蚀管流动态模拟装置,模拟现场工艺条件,研究了暴氧和除氧条件下,油田流动污水介质中A3钢的腐蚀行为。用失重法和交流阻抗、极化曲线方法,揭示了A3钢在油田污水介质中腐蚀的电化学规律。结果表明:A3钢在油田污水介质中的腐蚀受阴极氧的去极化控制,流动过程和溶解氧共同作用,极大地加速了油田污水介质对A3钢的腐蚀性。     

分组问题与球盒模型

本文通过分组问题研究,构建球盒模型,从而完善分组算法理论。     

无人帆船自主避障算法

针对无人帆船短途航行的避障需求构建了无人帆船自主避障系统,提出了基于A*的帆船避障路径规划算法以及基于LOS的帆船循迹控制算法。案例帆船的仿真测试和航行测试均成功实现多个障碍物场景下的自主避障航行,较为充分地证明了方法的可行性与实时性,对无人帆船应用具有重要意义。     

三亚市某小规模水质净化厂二期扩建工程设计经验

小规模水质净化厂二期扩建工程规模为1.5万m3/d,采用改良A2O+混凝沉淀池+纤维转盘过滤的主体工艺,设计出水水质满足GB 18918-2002《城镇污水处理厂污染物排放标准》中的一级A标准并满足GB/T 18921-2002《城市污水再生利用城市景观环境用水水质》的观赏性景观环境用水水景类标准;对二期扩建工程的工艺设计进行了总结和归纳,阐述了进出水水质及主要处理构筑物的设计方案,同时附有运行一段时间的情况及改进经验总结,可为同类型工程提供参考。     

机车视频与LKJ数据联动分析软件设计研究

随着轨道交通行业对安全方面的要求越来越高,以及大数据,数据挖掘应用越来越广泛,地面人员了解并掌握分析机车基本运行情况越来越有必要.介绍了机车6A视频与LKJ运行数据联动播放器软件,该软件是用于离线状态下分析机车行车视频及运行数据信息的专业视频解析软件,该软件展示并分析了机车行驶状态,机车行驶监控数据,机车项点等信息,提...     

基于DS18820的多路温度采集系统

提出了基于采用DS18820和AT89C51单片机组成的单总线多路温度检测系统,详细给出了硬件和软件系统的设计过程。该系统设计可靠性高、性价比高,在智能化自动检测和控制系统中具有广阔的前景。