Analysis of variance based on fuzzy observations

Analysis of variance (ANOVA) is an important method in exploratory and confirmatory data analysis. The simplest type of ANOVA is one-way ANOVA for comparison among means of several populations. In this article, we extend one-way ANOVA to a case where observed data are fuzzy observations rather than real numbers. Two real-data examples are given to show the performance of this method.     

Adaptive Discretization for Computerized Tomography

Two adaptive discretization frameworks are tested for computerized tomography (CT) data reconstruction. Removal of inactive pixels is primary motivation. Efficient and user independent entropy optimized masking is employed for spatial filtering purposes. Density of nodes at high gradient of reconstructed physical property is used as adaptation criterion. An alternative option, independent from noisy projection data and nature of the physical properties, is also discussed. Sensitivity analysis between the uniform and nonuniform (evolved via adaptive route) reconstruction grid reveals the utility of nonuniform grids. Iterative and transform based reconstruction techniques are used. Outcomes are tested successfully on three real world projection data from two different compact CT setups and one commercial high-resolution micro-CT scanner.     

高分辨率卫星遥感影像立体像对量测的实验——精度统计、分析总结和可行性分析

对0.31 m分辨率Worldview3立体像对带RPC参数的立体量测实验,采用不同的作业平台对立体像对进行量测实验,进行精度统计、分析总结和可行性分析。最终得出0.31 m分辨率Worldview3立体像对在1∶2 000比例尺3D产品生产的可行性,为生产服务打下基础和实践。     

Mass spectrometry of peptides and proteins from human blood

It is difficult to convey the accelerating rate and growing importance of mass spectrometry applications to human blood proteins and peptides. Mass spectrometry can rapidly detect and identify the ionizable peptides from the proteins in a simple mixture and reveal many of their post‐translational modifications. However, blood is a complex mixture that may contain many proteins first expressed in cells and tissues. The complete analysis of blood proteins is a daunting task that will rely on a wide range of disciplines from physics, chemistry, biochemistry, genetics, electromagnetic instrumentation, mathematics and computation. Therefore the comprehensive discovery and analysis of blood proteins will rank among the great technical challenges and require the cumulative sum of many of mankind's scientific achievements together. A variety of methods have been used to fractionate, analyze and identify proteins from blood, each yielding a small piece of the whole and throwing the great size of the task into sharp relief. The approaches attempted to date clearly indicate that enumerating the proteins and peptides of blood can be accomplished. There is no doubt that the mass spectrometry of blood will be crucial to the discovery and analysis of proteins, enzyme activities, and post‐translational processes that underlay the mechanisms of disease. At present both discovery and quantification of proteins from blood are commonly reaching sensitivities of ～1 ng/mL. © 2010 Wiley Periodicals, Inc., Mass Spec Rev 30:685–732, 2011     

摇珠法在工程招投标过程中的报价分析

按照综合评估法中摇珠法的运作原则对投标竞争环境进行了分析,利用概率统计的方法研究并得出了各个不同级别的投标单位的最佳投标报价策略,以期为相关单位的竞标提供一些参考。     

DEM在风电场风机点位优化设计中的应用

本文基于DEM,通过Arc GIS10.0软件,采用空间分析工具提取出风电场测区内风机点位的坡度图,通过对坡度图进行分级统计分析,设计出风电场中风机点位的最优位置,从而提高工程项目的质量和效率。     

码分无线射频识别系统空中接口协议设计及性能分析

为进一步提高无线射频识别系统单个读写器识别电子标签的速率,设计了一种将码分与统计时分技术相结合的新型无线射频识别系统的空中接口协议,并分析了系统的抗噪声性能、识别速率等主要性能指标。仿真结果表明,新型无线射频识别系统在抗噪声性能和识别速率等方面均优于基于现有国际标准ISO/IEC 18000-6C的无线射频识别系统。     

基于二阶矩的雷达信号盲分离

针对雷达接收机在现代战场复杂电磁环境下接收到的混叠信号,提出了一种基于二阶矩的信号盲源分离方法。在混合信号球化过程中,对于具有加性白噪声的模型,构造了一组新的协方差矩阵,在信噪比不是很高的情况下,使其不会影响分离结果。在协方差矩阵对角化过程中,采用自然梯度的方法,避免分离矩阵更新过程中的求逆问题,提高了算法的实时性。仿真实验证明,在信噪比为-10 dB的条件下,对比FastICA算法,所提算法分离精度高,收敛速度快,为进一步的信号识别提供可靠依据。     

通信信号的单通道盲分离和码元序列盲估计

针对被单根天线接收的多个通信信号的单通道盲分离问题,提出了一种新算法.该算法利用各个通信信号的周期性差异和波形差异,应用过采样技术和高阶统计量分析技术来构造适用于独立分量分析的多通道混合模型,从而将多信号盲分离问题转化成波形和码元序列的估计问题.仿真证实了新算法的可行性和优越性.     

2014年建筑业发展统计分析

在翔实的统计数据基础上,从固定资产投资和产业规模、企业数量和从业人员、支柱产业地位、企业经营状况、合同总额和新签合同额、房屋建筑施工竣工面积、对外承包工程等方面对2014年建筑业总体情况进行了分析。总结出2014年中国建筑业江浙两省仍雄居龙头、中西部地区新签合同额增速较快等5个特点。从专业类别、资质等级、注册地区和登记类型4个角度,对2014年建筑业特、一级企业的总产值、总收入、利润和新签合同额等主要指标完成情况进行了分析。