Yongsheng Zhao

Learn More
In this paper, a novel blind image watermarking scheme based on QR decomposition is proposed to embed color watermark image into color host image, which is significantly different from using the binary or gray image as watermark. When embedding watermark, the 24-bits color host image with size of 512 × 512 is divided into non-overlapping 4 × 4 pixel blocks(More)
Complex dynamical systems, such as aircraft, chemical processes, power plants, shipboard equipment, etc., are required to maintain an acceptable level of operational integrity and availability. Current research aims to maximize uptime by maintaining such systems only when required. A viable and cost-effective diagnostic/prognostic system architecture must(More)
This paper develops an adaptive robust control design strategy for automatic steering of ships with unknown parameters under unknown environmental disturbances induced by wave, wind, and ocean current. Based on the incorporation of the Nussbaum-type function into backstepping design and some technical lemmas, the proposed design method does not require a(More)
In this paper, we consider a certain class of Markov renewal processes where the matrix of the transition kernel governing the Markov renewal process possesses some block-structured property, including repeating rows. Duality conditions and properties are obtained on two probabilistic measures which often play a key role in the analysis and computations of(More)
BACKGROUND To conserve laryngeal function and elevate living quality of laryngeal squamous cell carcinoma (LSCC) patients, we designed antisense oligodeoxynucleotides (AS-ODNs) to reduce expression of ATM and to enhance the apoptosis of hep-2 (Human epidermoid laryngeal carcinoma) cells to radiation in vitro and in vivo. METHODS The expression of ATM mRNA(More)
The successfulness of fuzzy application depends on a number of parameters, such as fuzzy membership functions, that are usually decided upon subjectively. In this paper, we propose a new method utilizing ant colony algorithm (ACA) to optimize the fuzzy membership function's parameters, which overcoming the subjectivity and blindness in the process of(More)
In the deoxygenating section of a hydrogen purification process, the oxygen content of hydrogen contained by-production gas from chlorate process and the temperature inside the deoxygenating tower need to be controlled. The requirements of the safety and high production yield of the process are controversy. For safety, these two parameters must be(More)
Trajectory prediction is a key issue to a ping-pong robot, many algorithms have been developed. To get more robust and accuracy prediction under different serving conditions, this paper presents a new prediction method. The proposed method establishes two equivalent forms of the dynamic model of flying ball, where the discrete form for state estimation and(More)