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This paper introduces a physical method to increasing the energy efficiency of time-modulated reflector-arrays (TMRA) using double layer designs. TMRAs are proposed to reproduce functions of conventional time-modulated arrays without complex feeding networks. Conventional TMRAs consist of a layer of reconfigurable scattering elements which ‘waste’ the energy when they are not scattering. In this contribution,...
Optimal transmission switching (OTS) exploits the flexibility in grid topology to reduce the system dispatch cost. However, DC-power-flow-based OTS solution cannot guarantee a feasible AC dispatch, which is one of the challenges in practical implementation. To bridge the gap between the theoretical basis and practical implementation of OTS, this paper proposes a conic programming approach to the OTS...
The conventional PSFB converter has received considerable attentions for medium- or high-power applications, which is because it features high conversion efficiency and high power density. However, the hold-up-time requirement limits its operating duty ratio in nominal state and it increases the conduction loss caused by circulating current. Therefore, by introducing an auxiliary coupled inductor...
The problem of a flight vehicle intercepting an unknown maneuvering target is investigated. Interceptor's possible guidance laws are considered while target's limited maneuver forms are assumed. The terminal guidance is divided into several phases and system information is expressed by a few matrices. We describe the pursuit-evasion scenario as an evolutionary game process. An approach to formulation...
An adaptive nulling scheme for a time-modulated reflector-array (TMRA) based on Minimum Variance Distortionless Response (MVDR) beamforming is introduced and investigated. Compared to conventional phased arrays or reflector arrays, a TMRA is potentially simpler to apply in hardware as it does not require a complex feed network or the use of phase shifters. Minimum variance distortionless response...
Virtual basestation (vBS) live migration is an enabling technology for reducing the power consumption of the baseband unit (BBU) pool of the cloud radio access network (Cloud RAN). Our previous work shows that using the existing virtual machine live migration solutions for vBS migration will introduce a service interruption time of several seconds, which is unacceptable for real-time services carried...
This paper examines various topologies for the gate-drive circuit for power semiconductors used in high-frequency high-temperature applications. Particular emphasis is placed on transformer-isolated topologies and their implementation using commercially available high-temperature components. Low temperature circuits are built and tested for all candidate configurations. One candidate topology was...
A new form of RFID tag based on the concept of a phase-modulating surface is presented. The tag consists of a two by two array of pin diode controlled dipole elements. By applying individual d.c. control signals to each of the diodes, it is possible modulate RF energy scattered from the tag. An experimental system is described and measurements made at 10GHz are presented to show that the tag can impart...
In our previous work, a SDH Synchronous Links Organization Testing, Optimizing and Evaluating (SDH-SLOTOE) platform focusing on power communication networks has been founded supported by China Electric Power Research Institute (CEPRI). In this paper, SDH-SLOTOE is expanded to a PTN-SLOTOE platform. The Ethernet Synchronization Messaging Channel (ESMC) defined in ITU-T G.8264 is supported, and multi-standby...
This article established the SV-MTVP (time-varying parameters of SV-M model) model to describe the crude oil price volatility. Based on Bayesian principle, this paper used of the MCMC methods to estimate the parameter of the SV-MTVP model. And then established the MS model and analyzed the change-point of crude oil price volatility which based on the estimated results of the time-varying parameters...
In this paper, a novel proportional-integral (PI) switching surface is introduced for determining the synchronization performance of systems in the sliding mode motion. Based on the sliding mode controller, the system is established by a robust control scheme which guarantees the occurrence of a sliding motion of error states even when the parameter uncertainty and external disturbance are present...
We derive conditions under which a d-ary multilog network is f-cast strictly nonblocking under the general crosstalk constraint that no active route can share more than c switching elements with other active routes. The problem setting is very general and thus challenging in many ways: (1) f-cast covers both unicast (f = 1) and multicast/broadcast (f = N), (2) d-ary networks are much more general...
In this paper a novel algorithm for detecting voltages of capacitors of cascade shunt active power filter (CSAPF) is presented based on Carrier Phase Shift-SPWM (CPS-SPWM). This work is motivated by the fact that the number of voltage sensors is largely increased by CSAPF with cascade topology which has been put into practical use for years especially in high voltage and high power drivers. Following...
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