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Identifying the major contributing factors to traffic collisions and their severity will assist highway safety improvement initiatives by improved facility design and educational program to address the needs due to the changes in demographics. The traffic collision data used in this study has been collected over the last 20 years on the rural highways and urban streets from Saskatchewan, Canada. In...
P-sets are composed of internal P-sets and outer P-sets. The P-sets structure is given in this paper, and P-sets have dynamic characteristics. By using P-sets, integration knowledge and its Generation, as well as the applications of integrated Knowledge in dynamic knowledge discovery are given.
Distributed Denial of Service (DDoS) attacks pose a major threat to today's cyber security. Defense against these attacks is complicated by source IP address spoofing, which is exploited by attackers to conceal source IP addresses and localities of malicious traffic. In this paper, we propose HPi (Hash-based Path Identification), a novel packet marking scheme to defeat DDoS attacks regardless of forged...
On Dec 8th, 2003, the top price levels showed in the limit order book were enlarged from three to live in Chinese stock market, and the transparency was largely increased. The paper studies on the contribution of every quote price to price discovery, and compares with contribution of before and after transparency was increased. The results show that there exists significant difference of information...
In adaptive observer methods for actuator fault estimation, the system has to satisfy the condition of the Strictly Positive Realness (SPR). However, some practical systems may fail to satisfy the SPR condition. This paper proposes two methods for actuator fault estimation without the need of the SPR condition, based on the adaptive observer technique with the same structure. At first, for a class...
This paper deals with specific problems encountered when full digital control is applied for the boost-type power factor correction (PFC) converter. The robust performance, voltage regulation and sample frequency of the proposed controller are highlighted. Compared with traditional design, a novel input voltage feed-forward control algorithm is proposed to reduce the closed-loop time constant and...
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