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Music Recognition System has becoming popular these days. They are based on either audio or symbolic method, which compares the user's query with the existing music database. The investigation has shown that the audio-based method system is good for storing sound waves. However, the limitation is to illustrate the content of the music. The symbolic-based method system doing well in representing the...
There are a number of existing music data storage formats and a number of existing music manipulating formats, each of which possess certain features and limitations. Thus, for the new coding scheme introduced, Music Definition Language (MDL) and Music Manipulation Language (MML), we analyse how well it can act as storage media. We carried out experiments on whether the new coding scheme can make...
Local gear faults will generate impact torques in the gear transmission system. Previous studies indicated that the fluctuating torque leads to a multicomponent modulation in stator current. So the motor current signature analysis can realize the non-invasive and remote diagnosis of gear faults. Instead of using the traditional methods which decompose a signal based on the frequency, this paper puts...
Wind generation forecast approaches are typically based on fixed model structures, which might fit well with existing data but fall short in forecasting out-of-sample data. The reason lies in that predetermined models cannot always capture the actual dynamic features of wind farms, resulting in unavoidable model errors. In this paper, a novel ultra-short-term wind generation forecast approach based...
The gaze tracker has been considered as an important human machine interface for consumer electronics. High accuracy/precision results are reported for some gaze trackers, but the experiments are conventionally evaluated by fixing the head position with a head support. Compared with infra-ray (IR) gaze tracker, the head movement problem becomes more complicated for a visible light gaze tracker (VLGT),...
High-stiffness servo system is easy to cause mechanical resonance in elastic coupling servo system. Although on-line adaptive notch filter is effective in most cases, it will lead to a severer resonance when resonance frequency deviated from the natural torsional frequency. To explain this phenomenon, an improved discrete system model is proposed. This paper quantitatively analyzes the influence of...
A deadbeat predictive control based current sensorless control method is proposed as a backup method in this paper, by replacing the current feedback with the predicted current at one sampling period ahead, the feedback current information is not needed, thus current sensors can be omitted. Noticing that parameter mismatch will largely influence the control performance of predictive control, q axis...
This paper proposes a novel on-line algorithm to obtain knowledge of moment of inertia by iteratively computing. Since load torque and moment of inertia are variables which cannot be decoupled, so it is hard to achieve good performance when load torque varies. This paper eliminates this problem and realizes ideal online inertia identification regardless of load condition. The algorithm in this paper...
For motor control applications, the speed loop performance is largely depended on the accuracy of speed feedback signal. M/T method, due to its high theoretical accuracy, is the most widely used in incremental encoder adopted speed measurement. However, the inherent encoder optical grating error and A/D conversion error make it hard to achieve theoretical speed measurement accuracy. In this paper,...
With the extensive application of machine learning algorithms in bioinformatics, more and more computer researchers are beginning to focus on this field. Polyadenylation of messenger RNA (mRNA) is one of the key steps of gene expression in eukaryotes, polyadenylation site marks the end of transcription, it is of great significance to explore prediction of the site of gene sequences encoding gene....
We established a platform for structure inspection with a microwave mesh and wireless heterodyne frame. Under a high radio-frequency regime, we are able to precisely resolve the ultrasonic vibration frequency from the measurement of the Doppler frequency shift. In the ultrahigh radio-frequency regime, the polarization-dependent heterodyne detection of the electromagnetic waves is performed. With the...
In view of problems of the current statistical (CS) model for weak maneuvering targets tracking, this paper combines it with constant velocity (CV) model, using the interacting multiple model (IMM) algorithm to estimate target states. The traditional algorithm with fixed transition probability matrix is improved by using an adaptive method, and it can adjust transition probabilities according to the...
Capacitance macromodel is a novel idea recently proposed for encrypting sensitive structures and bringing acceleration in the capacitance extraction of integrated circuits. The existing technique of macromodeling employs boundary element method (BEM), but may lead to unreliable results due to computational error. In this work, we present the technique of generating the capacitance macromodel based...
Based on a broadband near-zero refractive index metamaterial, the unit structure is simulated by electromagnetic software HFSS, and its reflection-transmission parameters are extracted. And the classical inversion algorithm is used to derive the band in the 16–17.5GHz with the same permeability and permittivity. However, the effect of near zero effect is not ideal and the refractive index is zero...
Based on the traditional I-shaped metamaterial structure, a new type of notched I-shaped structure is designed, and the reflection — transmission parameters are extracted by electromagnetic software HFSS. And the classical inversion algorithm shows that the structure can obtain the properties of permeability and dielectric constant in the range of 9.89 ∼ 10.24GHz.
Polarisation purity becomes increasingly important in modern radio sciences. Accurate measurement of the state of polarization of the sources is crucial for pulsar timing and cosmic magnetism in radio astronomy. A polarization purity of-40 dB is expected ideally across the entire scan range as wide as ±60o from the zenith. With aperture array technologies for such applications, it is a demanding requirement...
Microbubbles have been widely studied as ultrasound contrast agents and drug/gene carriers. However, their short lifetime and micron-sized would hamper their applications. Mesoporous silica nanoparticles (MSNPs) with large surface areas and pore volume allow for high drug payload and controllable release feature. Our previous studies showed that superhydrophobic MSNPs can adsorb surface bubbles, which...
Point set registration is a long addressed problem in lots of pattern recognition tasks. This paper presents a robust point set registration algorithm based on optimization of distance between two probability distributions. A major problem encountered in the point to point algorithms is the definition of correspondence between two point sets. This paper follows the idea of some probability based point...
The mechanism and morphological evolution of a thermal interface material prepared by pressureless sintering of a paste containing bimodal silver nanoparticles (AgNPs) were investigated. A high thermal conductivity (232 Wm−1K−1) was obtained from the material sintered at 250 °C for 30 min. These results could be ascribed to decrease of the defect densities and sintered densities of the sintered structures.
Motor current signature analysis (MCSA) provides a non-invasive approach to diagnose the gear fault. The performance of MCSA at different speed and load torque conditions is studied using Fast Fourier Transform (FFT) to extract fault features. The results show that it would be better to perform fault diagnosis under low speed and heavy load conditions. And it fails when adopting FFT to diagnose the...
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