Ok-Young Jang

The Dark Matter Particle Explorer(DAMPE) mission is one of the five scientific space science missions within the framework of the Strategic Pioneer Program on Space Science of the Chinese Academy of Science(CAS) approved in 2011. The main scientific objective of DAMPE is to detect electrons and photons in the range of 5 GeV–10 TeV with unprecedented energy resolution(1.5% at 100 GeV) in order to identify possible Dark Matter(DM) signatures. It will also measure the flux of nuclei up to above 500

In this paper, a copyright protection scheme based on visual cryptography and discrete cosine transform for colour images is proposed. Note that the watermark emphasized here is a colour watermark. Instead of hiding a watermark in a colour image for identifying the ownership of the image, all that is required is to construct an ownership share according to a master share created from the colour image by applying discrete cosine transform plus a watermark used for copyright certification. By stac

A fast motion search scheme is proposed for warping prediction (WP). Because of the iterative motion search, the computational load of WP is too great to be used in practical applications. If a proper node classification scheme is used, we can restrict iterative search within a very small subset of nodes without noticeable degradation in performance.

核栽培者是聚类最近 Camastra 和 Verri 建议的方法的一个新奇的核。它证明为各种各样的数据的好性能关于流行聚类的算法有利地设定并且比较。然而，方法的主要缺点是在处理大数据集合的弱可伸缩能力，它极大地限制它的应用程序。在这份报纸，我们用核心集合建议一个可伸缩起来的核栽培者方法，它是比为聚类的大数据的原来的方法显著地快的。同时，它能处理很大的数据集合。象合成数据集合一样的基准数据集合的数字实验显示出建议方法的效率。方法也被用于真实图象分割说明它的性能。

Based on remote sensing technique , using 1990's Landsat TM data and 2000's Landsat ETM data , the authors conducts the comparative study of mainstream area of Songhua River by means of human-computer inter- action method. The results show that the area of Songhua River mainstream was 738 102 km 2 in 1990 , and was 810. 451 km 2 in 2000. From 1990 to 2000 , the increased area of river mainstream is up to 72. 349 km 2 due to er in Jilin Province based on the land TM and Landsat ETM data collected

A method is presented which permits a broadcasting mechanism to securely transmit a single ciphertext with multiple messages. These messages will only be readable by those users who have the appropriate read key(s). The other messages will be undecipherable. This is a generalization of the secure broadcasting problem stated by G. H. Chiou and W. T. Chen (1989) and C. C. Chang and C. H. Lin (1988). The proposed generalized secure broadcasting cryptosystem is based on Newton's interpolating polyno

鉴于在为连续扔的平板，温度坡度的变化和在稳固液体的接口的前面边的树枝状的间距的团结过程的稳固液体的接口的周期的弯曲变丑，并且快克的成核和繁殖进程是 studied.It 被显示出接口的弯曲变丑沿着拉 directio 在温度坡度的稳固液体的接口，和出现的前面边导致温度领域变化在团结的中间、最后的阶段期间形成的起始的裂缝可以延长到扔的平板的表面并且成为一个内部裂缝。理论分析的结果是基本上与实验的一致。

A study on flocculation control based on fractal theory was carried out. Optimization test of chemical coagulant dosage confirmed that the fractal dimension could reflect the flocculation degree and settling characteristics of aggregates and the good correlation with the turbidity of settled effluent. So that the fractal dimension can be used as the major parameter for flocculation system control and achieve self-acting adjustment of chemical coagulant dosage. The fractal dimension flocculation