Jitian Xiao

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There has been an increased demand for understanding of web-users due to the web development and the increased number of web-based applications. Informative knowledge extracted from web user access patterns has been used for many applications, such as the prefetching of pages between clients and proxies. This paper presents an approach for measuring(More)
The cost of spatial-join processing can be very high due to the large sizes of spatial objects and the computation-intensive spatial operations. A filter-and-refine strategy is usually used to reduce the computing cost of spatial join when the number of spatial objects is large. In this paper we propose a method that aims to minimize the I/O cost at the(More)
Protocol conformance testing generally involves checking whether the protocol under test conforms to the given specification. An important issue in protocol conformance testing is the generation of test sequences in an efficient and effective way that achieves the required fault detection coverage. This paper proposed an approach for finding the shorter(More)
The spatial join is an operation that combines two sets of spatial data by their spatial relationships. The cost of spatial join could be very high due to the large sizes of spatial objects and the computation-intensive spatial operations. In spatial join processing, a common method to minimize the I/O cost is to partition the spatial objects into clusters(More)
Conformance testing using test sequences is used to ensure that a protocol implementation conforms to its specification. A commonly used technique to generate test sequences for specifications described by the finite state machines is the Wp-method with the Reset technique, which frequently results in long test sequences. In this paper, we propose a(More)
The organization of data on wireless channels, which aims to reduce the access time of mobile clients, is a key problem in data broadcasts. Many scheduling algorithms have been designed to organize flat data on air. However, how to effectively schedule semi-structured information such as XML data on wireless channels is still a challenge. In this paper, we(More)