Effects of sampling methodologies on FT-IR data base searching

The sampling methodologies employed in Fourier Transform Infrared (FT-IR) spectroscopy tend to distort to a degree the data obtained relative to that which would be obtained via transmittance. This distortion complicates data base searching. A standard sample of polystyrene was investigated using the techniques of transmittance, attenuated total reflectance (ATR), diffuse reflectance (DRIFT) and photoacoustic spectroscopy (PAS). Several types of corrections are employed to minimize the distortions due to sampling methodologies.These corrections are evaluated with respect to four distinct search algorithms. The results obtained indicate that proper mathematical treatment of the data prior to data base searching enhances the discrimination value of a data base search.     

基于微处理器核的媒体系统芯片结构设计

围绕基于微处理器核的AAC解码器结构设计展开讨论，对IP定制、数据通路及存储设计进行了研究，并成功开发了一个基于微处理器核的MPEG-4AAC解码系统芯片。     

TDMA卫星通信技术在实际中的应用

以一个较成功的案例，探讨了TDMA卫星通信技术在会议电视、数据通信、话音等综合业务中的应用。     

Extending the GGobi pipeline from R

This paper describes progress towards developing a platform for rapid prototyping of interactive data visualizations, using R, GGobi, rggobi and RGtk2. GGobi is a software tool for multivariate interactive graphics. At the core of GGobi is a data pipeline that incrementally transforms data through a series of stages into a plot and maps user interaction with the plot back to the data. The GGobi pipeline is extensible and mutable at runtime. The rggobi package, an interface from the R language to GGobi, has been augmented with a low-level interface that supports the customization of interactive data visualizations through the extension and manipulation of the GGobi pipeline. The large size of the GGobi API has motivated the use of the RGtk2 code generation system to create the low-level interface between R and GGobi. The software is demonstrated through an application to interactive network visualization.     

Approximate colored range and point enclosure queries

In this paper, we formulate two classes of problems, the colored range query problems and the colored point enclosure query problems to model multi-dimensional range and point enclosure queries in the presence of categorical information. Many of these problems are difficult to solve using traditional data structural techniques. Based on a new framework of combining sketching techniques and traditional data structures, we obtain two sets of results in solving the problems approximately and efficiently. In addition, the framework can be employed to attack other related problems by finding the appropriate summary structures.     

A Novel Rule Induction Algorithm

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ｋｎｏｗｌｅｄｇｅｄｉｓｃｏｖｅｒｙｉｎｄａｔａｂａｓｅｓ (ＫＤＤ)ｉｓｃｏｎｃｅｒｎｅｄｗｉｔｈｅｘｔｒａｃｔｉｎｇｕｓｅｆｕｌｉｎｆｏｒｍａｔｉｏｎｆｒｏｍｄａｔａｂａｓｅｓ.Ｔｈｅｔｅｒｍｄａｔａｍｉｎｉｎｇｈａｓｈｉｓｔｏｒｉｃａｌｌｙｂｅｅｎｕｓｅｄｉｎｔｈｅｄａｔａｂａｓｅｃｏｍｍｕｎｉｔｙａｎｄｉｎｓｔａｔｉｓｔｉｃｓ (ｏｆｔｅｎｉｎｔｈｅｌａｔｔｅｒｗｉｔｈｎｅｇａｔｉｖｅｃｏｎｎｏｔａｔｉｏｎｓｔｏｉｎｄｉｃａｔｅｉｍｐｒｏｐｅｒｄａｔａａｎａｌｙ…     

卷积码纠错法在校园多媒体广播系统中的应用

论述了校园多媒体广播系统中数据通信的又一差错纠错方法--卷积码，其编码器和大数逻辑译码器较简单，纠错性能更好。     

带有缺失数据的广义半参数模型的均值借补估计

本文在响应变量随机缺失时, 给出了广义半参数模型中响应变量的2个均值拟似然借补估计.证明了它们具有渐近正态性, 给出了估计的渐近偏差与渐近方差, 并进行模拟比较.     

X射线衍射仪功能扩展的研究

通过软件实现了用 Ｐ Ｃ 机调用日本 Ｒｉｇａｋｕ 公司生产的 Ｄ／ ｍａｘ 一类 Ｘ 射线衍射仪测量数据，利用 Ｐ Ｃ 机的复杂计算功能，使原有仪器也可以进行新的结构分析工作，扩展了仪器的功能。     

Asymptotic normality of a covariance estimator for nonsynchronously observed diffusion processes

We consider the problem of estimating the covariance of two diffusion-type processes when they are observed only at discrete times in a nonsynchronous manner. In our previous work in 2003, we proposed a new estimator which is free of any ‘synchronization’ processing of the original data and showed that it is consistent for the true covariance of the processes as the observation interval shrinks to zero; Hayashi and Yoshida (Bernoulli, 11, 359–379, 2005). This paper is its sequel. Specifically, it establishes asymptotic normality of the estimator in a general nonsynchronous sampling scheme.