Now showing items 1-20 of 721

    • Signal handling in the use of CCD in multichannel spectral detection 

      Chen, WX; 陈伟翔 (P SOC PHOTO-OPT INS, 2000)
      When CCD is used in multichannel spectral detector, it's output accompanied with noises and distortion because of the device working in the condition of lower lighting, and because of the sensitivity of CCD different from ...
    • Managing dynamic shared state in virtual space for collaborative design 

      Li, L; Yang, CH; Li, TQ; 李琳 (NATL RESEARCH COUNCIL CANADA, 2001)
      In building the virtual world for distributed collaborative design, the senses of sharing the world and cooperation between physically distributed hosts and users are usually achieved by maintained dynamic shared state. ...
    • Novel method for the demodulation of wavelength shift of fiber Bragg gratings 

      Dong, XP; Chu, BCB; Yi, B; Chiang, KS; 董小鹏 (P SOC PHOTO-OPT INS, 2001)
      A novel method to detect the small wavelength shift of the fiber Bragg grating used in an electric current sensor with a comb like fiber filter is proposed in this paper. The wavelength filter was constructed by jointing ...
    • Holographic optical element for clock distribution in optical interconnection 

      Zhang, XS; Liu, S; Li, SS; 李森森 (P SOC PHOTO-OPT INS, 2002)
      The novel method of using holographic optical element (HOE) to realize optical clock distribution for optical interconnection is presented. Polarization holographic technique is adopted to fabricate the HOEs. 4-fan-out ...
    • A postprocessing method for the directional field of fingerprint 

      Ke, Y; Li, CH; 李翠华 (WORLD SCIENTIFIC PUBL CO PTE LTD, 2003)
      An efficient method for postprocessing of the directional field is presented. Utilizing the coherence of the squared gradients, our algorithm firstly clears off the background/noise block in the directional field and then ...
    • Fabrication of blazed holographic gratings two-step technique 

      Li, SS; Liu, S; Zhang, XS; 李森森 (PROC SPIE, 2004)
      A two-step technique of fabricating blazed holographic grating is presented. The grating fabrication includes two exposures and two developments. In the first step, two collimated laser beams with symmetrical incidence ...
    • A new dynamic indexing structure for searching time-series patterns 

      Ziyu Lin; 林子雨; Yongsheng Xue; 薛永生; Xiaohua Lv; 吕晓华 (2004)
      We target at the growing topic of representing and searching time series data. A new MABI (Moving Average Based Indexing) technique is proposed to improve the performance of the similarity searching in large timeseries ...
    • Fabrication of holographic photonic crystal template with back incident interference beams 

      Liu, Y; Liu, S; Zhang, XS; Li, SS; Ren, XC; 李森森 (P SOC PHOTO-OPT INS, 2005)
      Photonic crystal template can be fabricated by holographic lithography in photoresist. A method for enhancing the quality of holographic photonic crystal template is mentioned in this paper. Because light energy is absorbed ...
    • Study on optimization of deflection routing in optical burst switched networks 

      Wang, JX; Song, Y; Wang, SH; Zeng, QJ; 王建新 (P SOC PHOTO-OPT INS, 2005)
      Deflection routing is one of contention resolution of optical burst switching networks. But the offset time maybe not enough for reserve resource if deflection routing adopted. Too much deflection adopted will deteriorate ...
    • A system for moving object detection and shadow extermination 

      Wang, HW; Bai, JH; Li, CH; Wu, QY; 王华伟; 白建华; 李翠华 (IEEE, 2005)
      A system for moving object detection and shadow extermination is described in this paper. In this system, an adaptive background model is built, which can achieve the process of initialization automatically. With an improved ...
    • Influence of fabrication parameters on groove profile of blazed gratings made with two-step holographic technique 

      Li, SS; Liu, S; Zhang, XS; Liu, Y; Ren, XC; 李森森 (P SOC PHOTO-OPT INS, 2005)
      The two-step holographic technique of fabricating blazed gratings has been successfully applied to common positive photoresist. Influence of three fabrication parameters in the second step on groove profile of blazed ...
    • Research on Virtual Chinese Human Eye and its application 

      Xie Jie-zhen; Wang Bo-liang; Ju Ying; Liu Zhuo; Huang Shao-hui; Wu Shi-hui; Zhang Ye; Wang Jia-xun; 鞠颖; 黄绍辉 (P ANN INT IEEE EMBS, 2005)
      In this paper a method to establish Virtual Chinese Human Eye was presented. In this method, five datasets were established base on eye tissue slices. 3-D structure model, physical model, and physiological model of eyeball ...
    • Using GVF snake to segment liver from CT images 

      Huang, Shaohui; Wang, Boliang; Huang, Xiaoyang; 黄绍辉; 黄晓阳 (IEEE, 2006)
      Liver segmentation on computed tomography (CT) images is a challenging task because the images are often corrupted by noise and sampling artifacts. Thus we choose GVF snake to perform the task. Unfortunately, GVF snake use ...
    • Mathematical analysis of active DDoS Defense systems 

      Li, Zhongwen; Xiang, Yang; 黎忠文 (IEEE, 2006)
      Based on the idea of active DDoS defense system, we discuss designing aims and characteristics of DDoS analytical model. Then we set up a model to describe the combat between attackers and defenders, which quantitatively ...
    • A heuristic algorithm for the container loading problem with heterogeneous boxes 

      Zhoujing Wang; Li, Kevin W.; Xiaoping Zhang; 张晓平 (IEEE SYS MAN CYBERN, 2006)
      The container loading problem (CLP) is notoriously known to be NP-hard, an intrinsically difficult problem that is too complex to be solved in polynomial time on a system of serial computers. Heuristic algorithms are often ...
    • Error-tolerant image coding for underwater acoustic transmissions 

      Zhao, Caidan; Cheng, En; 赵彩丹; 程恩 (INT C COMMUN CIRCUIT, 2006)
      In order to achieve the image transmission through a shallow underwater acoustical channel, an efficient error-resilient still image compression algorithm is proposed. Lower signal-to-noise ratio and strongly fast varying ...
    • Performance optimization of checkpointing schemes with task duplication 

      Li, Zhongwen; Xiang, Yang; Chen, Hong; 黎忠文 (IEEE, 2006)
      Using store-checkpoints (SCPs) and compare-checkpoints (CCPs), we present an adaptive checkpointing scheme that dynamically adjusts the checkpointing interval on line in this paper With additional SCPs and CCPs, we can use ...
    • Origin-destination network tomography with Bayesian inversion approach 

      Zhang,JZ; 张建中 (IEEE COMPUTER SOC, 2006)
      Origin-destination (OD) network tomography problem is the estimation of OD traffic counts from measurable traffic counts at router interfaces. In this paper the problem is formulated as a linear inverse problem with additive ...
    • An authentication model for multi-type domains in active networks 

      Rong Rong; Li Zhong-wen; Jiang Ye-feng; 黎忠文 (IEEE, 2007)
      Because of the coexistence of multi-PKI in multi-domains of active networks, the implementation of authentication for such multi-domains becomes one of the most important issues in active network security This paper proposes ...
    • Anti-interference performance analysis in Bluetooth frequency hopping system 

      Wu, Xiaofang; Shi, Jianghong; 吴晓芳; 石江宏 (IEEE, 2007)
      The main goal of this paper is to evaluate the anti-interference performance of a Bluetooth piconet in a multi-Bluetooth piconets environment. An overview of the frequency hop selection mechanism is presented and the basic ...