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Massive Open Online Courses (MOOCs) are growing substantially in numbers, and also in interest from the educational community. MOOCs are online courses aimed at large-scale interactive participation and open access via the Web that made them possible for anyone with an internet connection to enroll in free, university level courses. In this paper, we propose a novel method to discover various types...
In this paper, we study system performance in passivity based control designs. In particular, we consider the passivation method of [1], we extend it so to use non-positive passivation parameters and transfer functions, and present results to passivate systems that are not finite-gain stable. The passivation parameters are selected according to non-derivative based optimization methods when the system...
This paper focuses on the RFI signal in the impulse UWB system with equivalent time sampling. RFI signals in the equivalent time sampling cannot be completely recovered. To reveal the properties of the aliased RFI signals, we setup a simple mode of the RFI signal with time-varying phase and analyze the effect of the classical average operation. Simulations about the random and periodic equivalent...
Multi-terminal HVDC refers to an HVDC system that consists of three or more converter stations. When power is to be transmitted from different remote generation locations to different load areas, it may be economically and flexible using Multi-terminal HVDC. In this paper, based on the RTDS and the MTDC control and protection equipment developed by Nari-relays Electric CO.,LTD., the real time closed...
Negative refraction through a fishnet related metamaterial is demonstrated at 0.5 THz. This characterization is based on refraction angle determination through a prism-like structure. The measurements are performed by means of a goniometric time-domain spectroscopy system while a numerical assessment is carried out by full wave electromagnetic analysis.
Two-dimensional index profile reconstruction with differential near-field images measured by end-fire coupling is presented. Single mode fiber with a step-index profile measured at 632.8 nm is demonstrated.
Thesaurus alignments play an important role in realizing efficient access to heterogeneous cultural-heritage data. Current technology, however, provides only limited value for such access because it fails to bridge the gap between theoretical study and practical application requirements. This article explores common real-world library problems and identifies solutions that focus on the application-embedded...
As mainstream data warehouses are growing into the multi-terabyte range, adequate performance for decision support queries remains challenging for database query processors. Proper choice of query plan is essential in data warehouses where fact tables often store billions of rows. This paper discusses query optimization and execution strategies that Microsoft SQL Server employs for decision support...
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