A combined decision fusion and channel coding scheme for distributed fault-tolerant classification in wireless sensor networks

In this paper, we consider the distributed classification problem in wireless sensor networks. Local decisions made by local sensors, possibly in the presence of faults, are transmitted to a fusion center through fading channels. Classification performance could be degraded due to the errors caused by both sensor faults and fading channels. Integrating channel decoding into the distributed fault-tolerant classification fusion algorithm, we obtain a new fusion rule that combines both soft-decision decoding and local decision rules without introducing any redundancy. The soft decoding scheme is utilized to combat channel fading, while the distributed classification fusion structure using error correcting codes provides good sensor fault-tolerance capability. Asymptotic performance of the proposed approach is also investigated. Performance evaluation of the proposed approach with both sensor faults and fading channel impairments is carried out. These results show that the proposed approach outperforms the system employing the MAP fusion rule designed without regard to sensor faults and the multiclass equal gain combining fusion rule     

集成抗ESD二极管的SOI LIGBT/LDMOS器件结构及其制作方法

为探索与国内VLSI制造工艺兼容的新型SOI LIGBT/LDMOS器件与PIC的设计理论和工艺实现方法,首次提出含有抗ESD二极管的集成SOI LIGBT/LDMOS器件截面结构和版图结构,并根据器件结构给出了阻性负载时器件的大信号等效电路.探讨了该结构器件的VLSI工艺实现方法,设计了工艺流程.讨论了设计抗ESD二极管相关参数所需考虑的主要因素,并给出了结构实现的工艺控制要求.     

Analysis of mode characteristics for deformed square resonators by FDTD technique

The mode frequencies and quality factors (Q-factors) in two-dimensional (2-D) deformed square resonators are analyzed by finite-difference time-domain (FDTD) technique. The results show that the deformed square cavities with circular and cut corners have larger Q-factors than the perfect ones at certain conditions. For a square cavity with side length of 2 /spl mu/m and refractive index of 3.2, the mode Q-factor can increase 13 times as the perfect corners are replaced by a quarter of circle with radius of 0.3 /spl mu/m. Furthermore the blue shift with the increasing deformations is found as a result of the reduction in effective resonator area. In square cavities with periodic roughness at sidewalls which maintains the symmetry of the square, the Q-factors of the whispering gallery (WG)-like modes are still one order of magnitude larger that those of non-WG-like modes. However, the Q-factors of these two types of modes are of the same order in the square cavity with random roughness. We also find that the rectangular and rhombic deformation largely reduce the Q -factors with the increasing offset and cause the splitting of the doubly degenerate modes due to the breaking of certain symmetry properties.     

Analysis of mode quality factors and mode reflectivities for nanowire cavity by FDTD technique

The mode frequency and the quality factor of nanowire cavities are calculated from the intensity spectrum obtained by the finite-difference time-domain (FDTD) technique and the Pade/spl acute/ approximation. In a free-standing nanowire cavity with dielectric constant /spl epsiv/=6.0 and a length of 5 /spl mu/m, quality factors of 130, 159, and 151 are obtained for the HE/sub 11/ modes with a wavelength around 375 nm, at cavity radius of 60, 75, and 90 nm, respectively. The corresponding quality factors reduce to 78, 94, and 86 for a nanowire cavity standing on a sapphire substrate with a refractive index of 1.8. The mode quality factors are also calculated for the TE/sub 01/ and TM/sub 01/ modes, and the mode reflectivities are calculated from the mode quality factors.     

蒙特卡罗粒子输运计算自动建模程序系统的研究与发展

在广泛调研和分析现有几何建模方法特点的基础上研发了具有可视化用户界面的自动建模程序系统MCAM.它可以实现多种商用软件CAD模型与MCNP模型之间的相互转换,且提供了模型建立、预处理、属性分析等基本功能和计算结果可视化及基于医学映像建模接口等扩展功能.全面系统地介绍了MCAM的设计思想与原理、总体结构、主要功能和国际合作协议框架下的应用测试等情况.实践表明,它是一个实用的MCNP计算辅助工具和核设计与核分析质量保证工具.     

数字水印演化设计

数字水印算法中相关参数的选择是水印算法设计的一个关键问题。不同的参数选取，将直接影响到算法的有效性。该文给出一种采用演化计算进行水印参数有效选择的方法，实验结果表明，这种方法在提高水印健壮性的同时保证保真度。     

基于PC平台的多方会话的研究与实现

多方会话技术主要包括会话管理及语音处理两个部分。该文采用集中式信令和分布式媒体的多方会话模式，将会话管理和语音处理分离，研究并实现了一个基于PC的可形成一定规模的多方会话模型。该模型易于扩展，适合于公司运行。     

XBRL在银行业非现场监管中的应用

随着中国银行业改革和国际化进程的快速发展,非现场监管在银行业监管体系中的地位日益突出,而将 XBRL作为监管数据的表达和传输标准,并建立基于XBRL的监管数据采集系统是提升银行业非现场监管水平的重要手段。探讨了银行业非现场监管采用XBRL的诸多益处,并提出了通过建立联合工作组,按照规范化流程开发 XBRL分类标准等应用XBRL的若干建议,还建立了一个基于XBRL的银行业非现场监管信息系统的高层体系结构。     

高校考勤管理软件开发中若干技术问题

主要论述高校考勤管理软件的产生、设计中遇到的技术问题以及解决这些问题过程中用到的关键技术。根据具体的使用需求，该软件大体上分为数据提取、数据挖掘、数据管理这三个部分。     

多位LED串行显示电路设计与应用

74HC595A芯片具有串行输入、并行输出功能,利用该集成电路可设计多位LED(发光二极管)串行显示电路。文中介绍了利用该芯片设计的12位LED串行显示电路,详细说明了该电路的工作原理及编程思路,并给出了参考程序。该电路只占用单片机3根口线,较并行显示方式极大地节省了系统资源,已在实际系统中得到应用。