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Power transformer is one of the most expensive equipment and plays a vital role in power transmission and distribution (T&D) systems. This paper presents a comprehensive risk assessment method of transformers, which integrates the operating condition of transformer and the consequences of transformer failure. Health index provides a practical tool for evaluating the state of transformers. Meanwhile,...
The highway electromechanical system is an important support to ensure normal operation of the highway. Currently, the cyclical and integral maintenance strategy was mainly adopted. In order to improve the equipment utilization and economic performance, a key equipment search algorithm based on complex network structure is presented in this paper, which gives a new way with differentiation for highway...
Structure references are commonly-used at the core of applications in a multitude of domains such as image processing, signal processing, especially the scientific and engineering applications. SIMD instruction sets, as SSE, AVX, AltiVec and 3DNow, provide a promising and widely available avenue for enhancing performance on modern processors. However existing memory accessing shackles limit the achieved...
In modern industrial process control, most traditional fault detection and diagnosis methods have been researched and applied widely. Recently, a novel MSPC method known as DISSIM has been developed focusing on continuous processes and batch processes, the result is significant. Firstly, this paper describes a progressive multiple variables fault detection and diagnosis method based on dissimilarity...
To cope with the complex, diverse and rapidly changing battlefield environment sensing needs, a mission-oriented adaptive management system for multi-sensors network in the network centric warfare is proposed. Based on the principle of openness, adaptivity and robustness, the mission decomposition model, Meta-task sequence diagram construct method, sensor management plan optimization, and strategic...
This paper mainly makes an empirical research on the influencing factors of competitiveness of China's undertaking information technology outsourcing and the relationship between them. Based on Porter's competitiveness diamond model and relative domestic and foreign researches, this paper selects seventeen indicators as influencing factors and classifies them into six groups. Then through factor analysis,...
The state-of-the-art large scale image retrieval systems have mainly relied on two seminal works: the SIFT descriptor and bag-of-features (BOF) model. However, with the growth of image dataset, the discriminative power of SIFT descriptors was weakened rapidly when mapped to visual words. In this paper, we present a new approach to generate visual word pairs for image retrieval. Two different descriptors...
Three stationary Copula and time - varying SJC Copula functions and MLE based on ranks are used in tail dependence between stock return and volume in China and Hong Kong. We find evidence that the tail dependence between return and volume is asymmetry, the upper tail dependence is stronger and the lower tail is close to zero. The upper tail dependence is stronger in China than Hong Kong.
The task decomposition and allocation is a critical problem in the process of combat. Effective task decomposition and allocation strategy will help to improve the battle effectiveness. With the condition of tactical team, a new architecture of tactical team based on layered Agent is put forward in this paper according to the role and function of the combat entity in combat team. The function of different...
In view of the adverse engineering characteristics of saline soil such as collapsibility, salt expansion and corrosion, cement, cement-lime and KD curing agent have been respectively used to modify the saline soil in the coastal areas for engineering application. Unconfined compressive strength test of the modified soil has been conducted to analyze the reasons why the two previous modified materials...
In this paper, we investigate the mobile P2P file-sharing problem, and proposed a mobile P2P content distribution architecture. Due to mobile specific influence factors, a hybrid architecture has been employed. We assume that the P2P mobile terminal can publish, index and retrieve resources on the Index Server, and collect the real-time state and cache content resource through Resource Management...
This paper proposes an optimal Var resource allocation framework for power transmission system in such a manner that both voltage profile and security margin for future operation is considered. The risk index is used to represent the uncertainty in this framework. The conception of Var gap is proposed to cover the voltage profile issue and the security margin issue when the Var allocation is performed...
In this paper, the risk-based optimal power flow is proposed, which minimizes the economic cost considering the system reliability, and a refined system operation state is provided to clarify this approach. In order to obtain better economic benefit than traditional security-constrained optimal power flow, the corrective optimal power flow is used in this work. The reliability is represented by the...
In this paper, a systematic risk-based transmission line expansion approach is studied. The approach addresses three objectives: load-driven expansion, security-enhancement expansion and risk-based expansion. The first problem identifies transmission expansions necessary to correct inadequacy; the second problem identifies transmission expansion necessary to correct insecurity; the third problem balances...
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