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Vessel lumen centerline extraction is an important issue for the intra-operative guidance of endovascular instruments; furthermore, vessel centerline is often used as a reference position in many hemodynamic studies, especially in carotid arteries. In this work we propose an innovative method for the extraction of carotid vessels centerline from three-dimensional Color Doppler ultrasound images. The...
This paper considers the dissipative filter design problem for Takagi-Sugeno (T-S) fuzzy descriptor system with time-varying delay whose state is selected as premise variable when the state is immeasurable or measurable. Solvable conditions of the fuzzy dissipative filters involved in both cases are proposed, which can ensure that the error systems are admissible and strictly dissipative. This means...
This letter proposes a novel differential protection scheme for transmission lines based on skewness. The skewnesses of the differential current and restraining current are used jointly to identify the fault in transmission lines. The proposed scheme does not need to compensate the distributed capacitive current and is immune to noise. The feasibility of proposed scheme has been verified on a 1000...
Thanks to their advantages, such as high storage density and short response time to customers' requests, puzzle-based compact storage systems have been increasingly installed in warehouses and distribution centers recently. This study addresses zone boundary optimization for puzzle-based compact storage systems when a three-class-based storage policy is implemented, in attempting to facilitate system...
This paper presents a risk constrained economic dispatch model incorporating both the wind power and units' forced outage. The operation cost objective includes the costs of generation, spinning reserve, load shedding and wind spillage and the risk index is chosen as the expected load not served. A test system is adopted for illustration. The simulation results show that to decrease the cost (risk)...
Angstrom and attosecond control of free electron wave packets is one of the pinnacles of attosecond science. Orthogonally polarized two-color (OTC) laser fields allow to control the motion of field-ionizing electronic wave packets both in time and space[1]. In OTC pulses time and space are connected and thus an attosecond time scale is established in the polarization plane for both the emitted and...
Planning process families in relation to product families has been well recognized as a promising approach to achieving production stability and efficiency, where diverse customized products are involved. As with generic products accommodating product family design, generic processes facilitate process family planning in producing the corresponding product families. In view of the fact that a production...
The latest experimental results of a W-band (75–110 GHz) gyrotron traveling wave amplifier [1] with a helically corrugated waveguide and cusp electron gun is presented. A waveguide with a helical corrugation on its inner surface has ideal dispersive properties which improve the bandwidth of the amplifier whilst maintaining the already good efficiency of operation [2,3]. The large orbit annular electron...
Harmonic characteristics of a number of widely used appliances are investigated. Their cumulative effect on a 3-phase 4-wire distribution network, in terms of severity of harmonic disturbance and current unbalance, is explored. This data is used in designing an active power filter based on a 3-phase 4-leg flying capacitor multilevel converter to eliminate the harmonics and current unbalance. The controller...
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