摄像定尺系统在莱钢连铸机中的应用

介绍了摄像定尺系统的组成、控制原理、系统功能以及在连铸机中的应用效果。有效的提高了连铸机生产线板坯长度的精确性。     

网络中间件和NGN

未来的网络是开放的、具有统一结构的网络，中间件在未来的网络中将扮演重要的角色。在分析全球信息基础设施(GII)、信息通信架构(ICA)以及软交换系统的基础上。进一步把GII中的中间件功能分为网络中间件和面向应用的中间件，并分析了网络中间件和NGN的关系。     

基于共振隧穿二极管的蔡氏电路设计研究

首次提出一种基于共振隧穿二极管的蔡氏电路.利用共振隧穿二极管(RTD)的负微分电阻特性,采用驱动点特性合成的方法,实现了蔡氏电路中的分段线性电阻,通过一组参数的选取,进而实现了蔡氏电路,并用PSpice模拟软件进行了仿真验证.相对于用传统方法实现的蔡氏电路,基于RTD的蔡氏电路具有电路结构更加简洁、便于集成的特点.     

Modelling of Drop Size Distribution of Rain from Rain Rate and Attenuation Measurements at Millimeter and Optical Wavelengths

This paper describes a technique for modelling of rain drop size distributions at Calcutta in terms of negative exponential function, from the measurements of rain rate and attenuation over a dual wavelength LOS link at millimeter and optical frequencies. The DSD model obtained is then used to determine the attenuation at 94 GHz, for comparison with experimentally obtained attenuation at 94 GHz. This is also compared with the attenuation calculated by considering other experimentally obtained DSD models. The best fit negative exponential distribution function (modified M-P model) is presented along with some other experimentally obtained and reference models.     

基于多特征综合模糊识别方法的弹道中段目标识别

弹道导弹中段目标识别是中段反导作战的核心技术之一,也是反导指控系统指挥拦截作战的关键依据和成功拦截威胁弹头的保证。文中采用多特征综合模糊识别方法对中段多目标群进行识别研究,首先提取出具有明显物理意义的目标窄/宽带特征并对其进行模糊描述,在此基础上,对多目标进行综合模糊评判并给出评判准则,最后通过构建由三个目标组成的目标群开展仿真试验并给出仿真结果。结果表明,采用此方法能够快速准确的将真弹头从目标群中分离出来,具有较高的应用价值。     

某型舰炮环形薄壁结构件加工质量控制

针对某型舰炮环形薄壁结构件加工质量不稳定问题,从该环形薄壁结构件的加工方法、数控编程、刀具选择、切削用量选择及校正等多方面进行了探讨,提出了解决问题的工艺措施与途径,提高了该零件的加工质量。     

多视角红外图像目标识别方法

随着红外传感器的性能提升和应用普及,获取同一场景下同一目标的多视角图像成为可能。为此,提出联合多视角红外图像的目标识别方法。首先对多视角红外图像进行聚类分析,获取多个视角子集。在每个视角子集中,红外图像具有较强的相关性。对于不同的视角子集,它们相对独立。为充分利用这种相关性和独立性,采用联合稀疏表示（JSR）对单个视角子集进行决策。特别地,对于只包含一个视角的子集,则直接采用经典的稀疏表示分类（SRC）进行处理。对于不同视角子集获取的决策结果,基于线性加权的思想进行融合处理,并根据融合后的决策变量判决多视角红外图像所属的目标类别。因此,所提方法在分析多视角红外图像内在关联性的基础上,分别对局部相关性和整体的独立性进行考察,并通过决策层的融合将两者融为一体,提高了最终决策的可靠性。实验中,在采集的多类交通车辆红外图像上进行识别,分别在原始图像、加噪声图像以及部分遮挡图像上对方法进行测试和验证,经过对比分析验证了提出方法的有效性。     

G/S模式下Android地理信息浏览器缓存技术研究

为了研究G/S(geographic information browser/ distributed spatial data servers)模式客户端动态聚合服务,提出了一种在Android系统下基于G/S模式的地理信息浏览器缓存技术。利用移动终端硬件与软件技术的发展优势,将缓存结构分为3部分：用于存储显示地图瓦片的显示缓存,用于预存取的预存取缓存和由SQLite数据库管理的外部缓存。测试结果表明,该技术在提高地图瓦片加载速度的同时消除了移动终端在访问空间数据时的网络瓶颈。     

一种高可靠性、低功耗单节锂电池保护电路

A single lithium-ion battery protection circuit with high reliability and low power consumption is proposed.The protection circuit has high reliability because the voltage and current of the battery are controlled in a safe range.The protection circuit can immediately activate a protective function when the voltage and current of the battery are beyond the safe range.In order to reduce the circuit’s power consumption,a sleep state control circuit is developed.Additionally,the output frequency of the ring oscillation can be adjusted continuously and precisely by the charging capacitors and the constant-current source.The proposed protection circuit is fabricated in a 0.5 m mixed-signal CMOS process.The measured reference voltage is 1.19 V,the overvoltage is 4.2 V and the undervoltage is 2.2 V.The total power is about 9 W.     

Concurrent Blind Channel Equalization in Impulsive Noise Environments

In some communication systems the trans- mitted signal is contaminated by impulsive noise with a non-Gaussian distribution. Non-Gaussian noise caused significant performance degradation to communication re- ceivers. The new constant modulus blind equalizer based on Fractional lower-order statistics of the equalizer input, which is defined as FLOS_CMA, is able to mitigate impul- sive channel noise while restoring the constant modulus character of the transmitted communication signal. How- ever, like the Constant modulus algorithm （CMA）, the steady-state Mean square error （]VISE） of the FLOS_CMA algorithm may not be sufficient low for the system to ob- tain adequate performance. This paper proposes a con- current equalizer, in which a Decision-directed least mean p norm （DD_LMP） equalizer operates cooperatively with a FLOS_CMA equalizer, controlled through a non-linear link. Simulation results using M-QAM and 8-PSK signal- ing have shown that besides the capability of compensating the phase offset, the proposed concurrent FLOS_CMA and DD_LMP blind equalizer has faster convergence rate and lower steady-state MSE than the FLOS_CMA approach.