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In order to improve the detection accuracy of the Ultra High Frequency (UHF) method for the actual transformer partial discharge detection, Finite Difference Time Domain (FDTD) method is used to simulate the propagation progress of UHF signals excited by partial discharge in the power transformer. A simulation model of an actual single phase power transformer is established and an actual excitation...
In order to study the propagation characteristics of Ultra High Frequency (UHF) signals excited by partial discharge in an actual power transformer, a simulation model of the power transformer is established using Finite Difference Time Domain (FDTD) method to simulate the propagation progress of the UHF signals. The receiving signals in different points and planes are analyzed by time domain and...
Estimation of the steady state temperature rise of an industrial manipulator and its key components is often desired in the design of a manipulator. This paper presents and compares three model-based methods which aim to achieve the temperature estimation in early design phase before prototype test. The basic idea of each method is introduced along with the results of corresponding experimental verifications...
Duo to the TSV fabrication process, the void or stream often exists in the TSV. As we all know the void and stream cannot easily being avoided, the thermal mechanical reliability of TSV integrated circuit (IC) shall be studied deeply for evaluating the fatigue life of the IC products and rearranging the location of TSVs to relieving thermal issues. In addition, the thermal mechanism of void model...
Short utterance is a great challenge for speaker recognition, for there is very limited data can be used for training and testing. To give a robust estimation, the amount of model parameters for the short utterance should be less than that for the long utterance; however, this may impede the models descriptive capability. In this paper, we propose a multi-scale kernel (MSK) approach to solve this...
In this paper, we propose a method to improve detecting the mispronunciation type of the non-native learners. In order to cope with the low-resource condition of non-native speech and the difference of native and non-native speech, the following efforts are made: 1) train acoustic model with the low-resource non-native data; 2) introduce the articulatory-based tandem feature; 3) pool auxiliary native...
In second language learning, unawareness of the differences between correct and incorrect pronunciations is one of the largest obstacles for mispronunciation correction. In order to make the feedback more discriminatively perceptible, this paper presents a novel method for corrective feedback generation, namely, exaggerated feedback, for language learning. To produce exaggeration effect, the neutral...
In prosody event detection field, many local acoustic features have been proposed for representing the prosody characteristics of speech unit. The context information that represents some possible regularities underlying neighboring prosody events, however, hasn't been used effectively. The main difficulty to utilize prosodic context is that it's hard to capture the long-distance sequential dependency...
This paper presents a method to improve the mispronunciation detection performance for low-resource acoustic model. The 1h speech data is randomly selected from CU-CHLOE to imitate the low-resource non-native English situation. The Tandem feature derived from articulatory based Multi-Layer Perception (MLP) is employed to replace the traditional spectral feature (e.g. PLP). Further, motivated by similar...
This paper proposes two protection algorithms, Segment-Based Protection (SBP) and Path-Based Protection (PBP), in fault-tolerant multi-domain optical networks to support waveband grouping with the layered auxiliary graph concept. To the best of our knowledge, this paper is the first study to achieve the fault-tolerance and waveband switching in multi-domain optical networks. Simulation results show...
The work presented in this paper is about the design of current-controlled oscillators (ICO). Two ICOs are proposed. Aiming at reducing the duration of the short-circuit currents caused by slowly-changing voltages in the circuits, signal conversion blocks are introduced to generate sharp pulses. In this way, the power efficiency of the circuits is improved, which leads to an extensive performance...
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