Xinzhong Zhu

A Digital Watermarking Algorithm and Implementation Based on Improved SVD

An improved digital watermarking algorithm based on block-SVD (singular value decomposition) is put forward, which has better robustness. It can deal with the rectangle matrices directly and can extract better-quality watermarks. It takes little time to embed and extract the watermark in large images and this method can avoid some disadvantages such as the distortion caused by the computing error when extracting the watermark in the diagonal direction. Robustness testing results and time comparing analysis between SVD and block-SVD are presented in this paper. Compared with traditional Cox method, this algorithm has better robustness, faster speed and is more practical

A Research of Collaborative CAD System Based on Multi-Agent

To improve the features of cooperative design of products in distributed heterogeneous cooperation, methods of building cooperation interface and integration of heterogeneous design environment are presented with multi-agent technology. In products development, designs at various levels, stages and different places can cooperate and communicate with each other. So it takes a shorter time to develop a new product and high-quality of the product is improved. A system framework was put forward and a software environment supporting the remote collaborative design of product was developed and implemented to use

Web Services Based On Grid Technology

Creating an integrated virtual computing environment based on grid will provide a technical platform and supporting environment for realizing a seamless access and full share of entire resources on the Internet. This text has introduced a kind of Web service (grid-based Web service, GRWS) based on grid mainly. This paper discusses the concept, architecture, working mechanism and security of the grid based on Web services, and finally gives a brief summary

A fuzzy quantization approach to image retrieval based on color and texture

This paper presents a new image retrieval method which is based on color and texture features. By using fuzzy quantization (which is based on a linear subjection function in the quantization of HSV color space), this method attempts to make the quantization results more accessible to human perception; furthermore, according to the information of the extracted dominant color of partition, we introduce a neighborhood color matrix which is used to describe the relative color spatial distribution, for the purpose of improving the robustness of image transfiguration. With the supplementary information of image textures, our method combines both the image and texture features to conduct composite image retrieval. Our experimental results show that this method can greatly improve the retrieval accuracy.

New knowledge acquisition method in incomplete information system based on rough set and self-adaptive genetic algorithm

In this paper, a knowledge acquisition method is proposed in incomplete information system. Firstly, according to the rough set theory some improvement is made to the discernible matrix; then with integration of the self-adaptive genetic algorithm, a new knowledge acquisition algorithm to mine the consistent rules and inconsistent rules from the incomplete information system is presented. Furthermore, according to the study of confidence degree and support degree of association rule in complete information system, the rule confidence degree and support degree is defined within the framework of incomplete information system. Through the examination of experimental results, this algorithm is proved effective, especially to large incomplete information systems.

A New Communication Mechanism Based on Virtual Agent for Mobile Agent

Mobile agent technology can be used as one of the key technologies for new componentware frameworks. Communication mechanism of mobile agent plays a very important role in mobile agent systems. Communication mechanism could satisfy some requirements, such as location-transparency, reliability and high-efficiency. This paper introduces the current various communication algorithms and mechanisms for mobile agent, and summarizes their advantages and disadvantages. Subsequently, a new communication mechanism for mobile agent with the conception of virtual agent is put forward in this paper. This communication mechanism could implement the synchronism of communication and migration to a great extent, which could greatly improve the communication efficiency and reliability of the whole net

Image Retrieval Based on PCA-LPP

In many areas of image retrieval, pattern recognition and data mining, one is ofen confronted with some form of dimensionality reduction. In this paper, we introduce a algorithm of Principal Components Analysis-Locality Preserving Projections ( PCA-LPP ). This algorithm can compute the principal components of a sequence of data set and at the time optimally preserves the neighborhood structure of the data set. This procedure is done by merging the runs of two algorithms based on principal component analysis (PCA) and Locality Preserving projections (LPP) running sequentially. This algorithm is applied to image retrieval problem. Simulation results on Corel image database showed better accuracy rate of this algorithm compared to PCA and LPP algorithms.

A personalized multimedia retrieval frame based on user interest

This paper describes a personalized multimedia retrieval frame based on user interest through the multi-model cross-mutual knowledge base. The most important feature of the frame is to integrate the multi- model data into a seamless retrieval system. It calculates both the semantic and content level similarity between media object and the query condition. And, using user interest model to push interesting information and sort the inquiry results, so that users can easily and quickly find interesting objects.

Study on agile logistics distribution optimization model based on multi-agent

Combined with intelligent algorithms and dynamic multi-agent technology, this paper proposes an agile logistics distribution optimization model for scheduling vehicle routing problem (VRP) timely. This model uses frame structures to describe symbolic knowledge for models target function and constraints, so that some issues involved in the logistics scheduling optimization can be done away with. The results of simulation experiments prove that this model has mighty efficiency and bright future.

Online image information retrieval strategy based on the color preference of the user profile

The sustained growth of online image information brings more and more challenges to information retrieval. This promotes the remarkable process of image information retrieval strategy. This thesis puts forward a new kind of retrieval strategy based on the color preference of the user profile, which greatly increases the intelligence and accuracy of image information retrieval.