Lu Dongming

Zhejiang University, Hang-hsien, Zhejiang Sheng, China

Are you Lu Dongming?

Claim your profile

Publications (6)0 Total impact

  • Xia Ming · Dong Yabo · Lu Dongming · Xue Ping · Liu Gang
    [Show abstract] [Hide abstract]
    ABSTRACT: Microclimates in many wildland cultural heritage sites are not under surveillance up to now, due to the lack of power supply and network access. However, accurate microclimate data in cultural heritage sites are very important for research and conservation. In this paper, we present a wireless sensor system for long-term microclimate monitoring in wildland cultural heritage sites, and its deployment at the Mogao Grottoes. The system integrates wireless sensor network (WSN), long-distance wireless polling network (LWPN) and Internet to fit the complex geography of the Mogao Grottoes. Both robust hardware and fault tolerance strategies have been developed to ensure long-term stable monitoring. The currently deployed system consists of 241 data sensors covering 57 typical caves. The reliability and long life-time of the system are verified through network and battery performance evaluations at the end of the paper.
    No preview · Conference Paper · Jan 2009
  • Xia Ming · Dong Yabo · Lu Dongming
    [Show abstract] [Hide abstract]
    ABSTRACT: The unstable nature of wireless communication makes it hard to maintain a reliable network organization in Wireless Sensor Networks (WSNs). Therefore, network organization repair scheme is highly required for reliability. Because of the high energy efficiency requirement, the network organization repair scheme for WSNs differs from that for traditional networks. However, existing WSN network organization repair schemes are not energy efficient due to persistent listening, and may cause sensor nodes to fail to recover from network organization error situations. This paper proposes E-NORS, Energy-efficient Network Organization Repair Scheme, to overcome the high power consumption problem. E-NORS tries to restore the network organization on a duty cycle for energy conservation. A dynamic duty cycle adjustment mechanism is further presented in E-NORS to boost the repair speed in short time network organization error conditions. Evaluation results show that E-NORS can greatly prolong the lifetime of nodes in repairing the network organization, while maintaining a considerable repair speed.
    No preview · Conference Paper · Nov 2008
  • Sun Gang · Xing Wei · Wei Ping · Lu Dongming
    [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, a robust FGS video transmission scheme is proposed for streaming video over bandwidth-constrained packet loss channel, which aims to reducing both the overall distortion and quality fluctuation at the same time. We first use channel budget and packet loss property to determine the bits of enhancement layers that should be allocated per frame. Then unequal loss protection (ULP) using forward error correction (FEC) is applied to different FGS enhancement layers based on their significance. Effects of quality fluctuations by packet loss are considered while optimizing FGS bits allocation and FGS unequal loss protection. Experimental results show that the proposed method can guarantee received video quality and efficiently reduce quality fluctuations.
    No preview · Conference Paper · Jun 2008
  • Wei Ping · Li Junli · Zhao Shanxu · Lu Dongming · Chen Gang
    [Show abstract] [Hide abstract]
    ABSTRACT: Breast cancer is one of the most common malignant diseases among women, it is important to give patients early diagnose and treatment. Mammography has become the most effective way for detection of breast cancer, and it is sensitive to clustered micro-calcification which is the key characteristic of early breast tumors. In this paper, we propose a method of detection micro-calcification. We first select the regions of interest (ROI) from the whole breast area by using wavelet and adaptive thresholds according to each mammogram, which are the doubtful micro-calcification regions; then the ROIs are further analyzed by DOG filter to reduce false positive rate. Experimental results indicate that the proposed method can provide good detection performance.
    No preview · Article · May 2008
  • Source
    Wei Ping · Li Junli · Lu Dongming · Chen Gang
    [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, we propose a fast and reliable impulse noise filter for highly corrupted images. The median filter was once the most popular nonlinear filter for removing impulse noise because of its good denoising power and computational efficiency, but the performance are unsatisfactory when noise ratio is high. So many algorithms have been proposed to improve the filter result. Recently, a switching median filter with boundary discriminative noise detection (BDND) was proposed, it is very effective and outperforms all previously proposed median-based filters, but it's very time-consuming in calculation. The proposed filter use similar scheme as in BDND, it is also very effective and much more efficient than BDND. The proposed method use a new powerful and efficient noise detection method to determine if current pixel has been corrupted by noise, if it's corrupted, a variable window median filter is used to attenuate impulse noise, while those uncorrupted pixels are remain unchanged. Results from computer simulations are used to demonstrate pleasing performance of our proposed method.
    Preview · Conference Paper · Jun 2007
  • Wei Ping · Li Junli · Lu Dongming · Chen Gang
    [Show abstract] [Hide abstract]
    ABSTRACT: A main challenge of medical image enhancement is to solve conflicts between noise resistance and detail sharpening. A multi-scale enhancement method based on fuzzy logic (MEMBFL) is presented in this paper. The proposed method can prevent noise increasing during the sharpening of the image details. With this method, the original image is filtered by the hybrid low pass filter which is designed according to local context of the image in order to remove out the impulse noise and no-impulse noise. Then the filtered image is decomposed into several band pass images. Each pixel in band pass image is adaptively assigned a different enhancement factor by evaluating the local feature. The processed band pass images can be composed into an enhanced image by the process opposite to the decomposition process. Experimental results show that the proposed technique achieves good performances while can be easily used in medical image processing systems
    No preview · Conference Paper · Dec 2006