Jiahong Zhao

University of Wollongong | UOW ·  School of Electrical, Computer and Telecommunications Engineering (SECTE)

This paper investigates the application of the steered response power-phase transform (SRP-PHAT) method to co-prime microphone array (CPMA) recordings to estimate the direction of arrival (DOA) of speech sources. While existing CPMA approaches for acoustics applications are limited, especially under reverberant conditions, the proposed algorithm ut...

This paper proposes the co-prime circular microphone array (CPCMA), which applies co-prime array theory to circular microphone arrays. Compared with a conventional uniform circular array (UCA) with the same number of microphones and radius, the CPCMA achieves beampatterns with a narrower main lobe and fewer side lobes, whilst also avoiding spatial...

Deep learning brought a new method for hyperspectral image (HSI) classification, in which images are usually pre-processed by reducing their dimensions before being packaged into pieces to be input to the deep network for feature extraction. However, the learning capability of convolutional kernels of fixed dimensions is usually limited, and thus t...

Campus security incidents occur from time to time, which seriously affect the public security. In recent years, the rapid development of artificial intelligence has brought technical support for campus intelligent security. In order to quickly recognize and locate dangerous targets on campus, an improved YOLOv3-Tiny model is proposed for dangerous...

This paper proposes a semi-adaptive beamforming (SAB) algorithm for the co-prime circular microphone array (CPCMA), which takes advantage of subarray-based adaptive beamforming to achieve an optimised overall beampattern. The SAB approach calculates the bearings of grating lobes or the largest side lobes in the first sub-array before setting nulls...

This paper proposes a framework for unmixing of hyperspectral data that is based on utilizing the scattering transform to extract deep features that are then used within a neural network. Previous research has shown that using the scattering transform combined with a traditional K-nearest neighbors classifier (STFHU) is able to achieve more accurat...

The scattering transform, which applies multiple convolutions using known filters targeting different scales of time or frequency, has a strong similarity to the structure of convolution neural networks (CNNs), without requiring training to learn the convolution filters, and has been used for hyperspectral image classification in recent research. T...

This paper evaluates the performance of semi-coprime microphone arrays (SCPMAs) for speech source direction of arrival (DOA) estimation based on the steered response power-phase transform (SRP-PHAT) algorithm. The SCPMA is an extension of the coprime microphone array (CPMA), which combines the outputs of three sub-arrays to reduce the impact of spa...

This paper evaluates the performance of semi-coprime microphone arrays (SCPMAs) for speech source direction of arrival (DOA) estimation based on the steered response power-phase transform (SRP-PHAT) algorithm. The SCPMA is an extension of the coprime microphone array (CPMA), which combines the outputs of three sub-arrays to reduce the impact of spa...

The application provides a kind of call management device, and device includes: fixed line module and mainboard, and mobile call module is provided on the mainboard; Wherein, the fixed line module and the mobile call module share an audio management module. The technical solution of the application shares an audio management module due to fixed lin...

Present disclose provides the method and device for determining battery electric quantity, wherein, methods described includes: Obtain the magnitude of voltage of battery; The magnitude of voltage is mapped as to the initial quantity of electricity value of the battery; Determine the target electricity section belonging to the initial quantity of e...

The utility model provides a kind of opening/closing control device and POS, and the opening/closing control device includes: First detection circuit, the second detection circuit, logical gate; The output end of first detection circuit and the input of logical gate are connected, and high level is exported when receiving power supply signal and ot...

The utility model discloses a portable satellite communication antenna control system, which comprises a single chip microcomputer, an electrically-erasable programmable read-only memory, a Wifi module, a tuner, a beacon, a GPS receiver, a button, a driver, a pitching motor, an azimuth motor, a tilt sensor, a limiting switch, a polarization motor,...

The utility model relates to an automatic testing device of a spaceflight cable network. The automatic testing device of the spaceflight cable network belongs to the technology fields, such as multi-core cable test field, computer automatic test field, electronic field, etc. and is especially used for the conduction test of the cable network in a s...

The utility model relates to a satellite beacon receiver, belonging to the technical field of satellite communication application. The receiver comprises a radio frequency signal processing module, a control module and a communication module, wherein the radio frequency signal processing module comprises a four-grade amplification module, a first f...

Based on the chaotic password theory,a new encryption method is brought forward.Firstly Arnold's cat mapping and 3D—Lorenz chaotic system are used by ameliorated algorithm to generate mixed chaotic sequences. Then the plaintext message is calculated with the sequences to generate the ciphertext message.Finally,the ciphertext is hided in audio carri...

As the air flow control system has the characteristics of delay and uncertainty, this research designed and achieved a practical air flow control system by using the hydrodynamic theory and the modern control theory. Firstly, the mathematical model of the air flow distribution of the system is analyzed from the hydrodynamics perspective. Then the m...

According to the characteristics of wind field control system such as delay and uncertainty, hydrodynamics theory and modern control theory are used to design and achieve a practical wind field control system. Firstly, the mathematical model of the wind speed distribution of the system is analyzed from the angle of hydrodynamics. Then the Galerkin...

According to the characteristics, such as delay and uncertainty, of air speed plane control system, the improved chaos optimization algorithm and intelligent PID control algorithm were adopted to design and achieve a practical intelligent air speed plane control system. Firstly, by using intelligent PID control algorithm, the output speed of the fa...