In this paper, a consistent pattern with the optimal coordinated design of PSS and SSSC controller to improve the damping of low frequency oscillations is shown. In this design, sensing and signal transmission time delays are considered as effectiveness parameters. The design problem has been considered an optimization problem and biogeography-based optimization (BBO) algorithm is used for sear...

Domain-specific modelling (DSM) environments enable experts in a certain domain to actively participate in model-driven development. Developing DSM environments need to be cost-efficient, since they are only used by a limited group of domain experts. Different modeldriven technologies promise to allow this cost-efficient development. [1] presented experiences in developing a DSM environment for...

In this research, we investigated whether a learning process has unique information searching characteristics. The results of this research show that information searching is a learning process with unique searching characteristics specific to particular learning levels. In a laboratory experiment, we studied the searching characteristics of 72 participants engaged in 426 searching tasks. We cl...

This is the 8th year that IR group of Tsinghua University (THUIR) participates in TREC. This year we focus on Web track, which contains two tasks, namely ad hoc and diversity. On ad hoc task, we improved the efficiency of our distributed retrieval system TMiner to handle terabytes of Web data. Then three studies have been done, namely page quality estimation, ranking feature analysis, and model...

this paper is a survey of recent contributions to and developments in the relationship between efficiency and productivity via the production function. the objective is to provide a brief discussion on data and on the methods of measuring efficiency and productivity. first, we introduce the reader to the measurement of partial and total factor productivity in the context of static and firm - sp...

This paper addresses issue of sensitivity of efficiency classification of variable returns to scale (VRS) technology for enhancing the credibility of data envelopment analysis (DEA) results in practical applications when an additional decision making unit (DMU) needs to be added to the set being considered. It also develops a structured approach to assisting practitioners in making an appropria...

Due to the ability simultaneously interrogate multiple tags with a far operating distance, radio frequency identification (RFID) has been widely used in modern farms improve management efficiency. In smart farm applications, how quickly locate and search some specified items (e.g., animals) is critical problem, for which tag searching can be solve problem. While there are works on searching, th...

There are proposed method of acceleration of large string search in database of learning management system.

We present a linear-space data structure that maintains a dynamic set of n points with coordinates of real numbers on the plane to support orthogonal range counting, as well as insertions and deletions, in O(( lgn lg lgn )) time. This provides faster support for updates than previous results with the same bounds on space cost and query time. We also obtain two other new results by considering t...