Emotion Recognition From Speech Using Perceptual Filter and Neural Network

This chapter on multi speaker independent emotion recognition encompasses the use of perceptual features with filters spaced in Equivalent rectangular bandwidth (ERB) and BARK scale and vector quantization (VQ) classifier for classifying groups and artificial neural network with back propagation algorithm for emotion classification in a group. Performance can be improved by using the large amount of data in a pertinent emotion to adequately train the system. With the limited set of data, this proposed system has provided consistently better accuracy for the perceptual feature with critical band analysis done in ERB scale.

Identifikasi Jenis Kayu Berdasarkan Fitur Tekstur Local Binary Pattern Menggunakan Metode Learning Vector Quantization

Pada umumnya pengenalan jenis kayu masih dilakukan dengan menggunakan indera penglihatan dan penciuman. Hal tersebut dapat mempengaruhi proses jual beli dimana waktu yang dibutuhkan untuk pengenalan kayu menjadi lebih lama sehingga menyebabkan proses bisnis menjadi kurang efektif. Penelitian ini bertujuan untuk membangun suatu model machine learning untuk proses identifikasi jenis kayu berdasarkan fitur teksur citra pada kayu. Metode Local Binary Pattern (LBP) digunakan dalam proses ekstraksi ciri untuk menghasilkan vektor ciri yang dijadikan data input pada proses klasifikasi citra dengan menggunakan metode Learning Vector Quantization (LVQ). Parameter yang digunakan pada metode LBP meliputi numpoint dan radius dengan nilai 1 sampai 10. Hasil penelitian dari metode ini didapatkan akurasi tertinggi 68,33% pada numpoint 2 dan radius 1. Hasil pengujian yang cukup rendah dapat dipengaruhi oleh beberapa faktor yaitu jumlah citra latih dan terdapat beberapa citra kayu memiliki pola yang hampir sama.

HHO-Based Vector Quantization Technique for Biomedical Image Compression in Cloud Computing

In the present digital era, the exploitation of medical technologies and massive generation of medical data using different imaging modalities, adequate storage, management, and transmission of biomedical images necessitate image compression techniques. Vector quantization (VQ) is an effective image compression approach, and the widely employed VQ technique is Linde–Buzo–Gray (LBG), which generates local optimum codebooks for image compression. The codebook construction is treated as an optimization issue solved with utilization of metaheuristic optimization techniques. In this view, this paper designs an effective biomedical image compression technique in the cloud computing (CC) environment using Harris Hawks Optimization (HHO)-based LBG techniques. The HHO-LBG algorithm achieves a smooth transition among exploration as well as exploitation. To investigate the better performance of the HHO-LBG technique, an extensive set of simulations was carried out on benchmark biomedical images. The proposed HHO-LBG technique has accomplished promising results in terms of compression performance and reconstructed image quality.

Fault Diagnosis for PEMFC Water Management Subsystem Based on Learning Vector Quantization Neural Network and Kernel Principal Component Analysis

To solve the problem of water management subsystem fault diagnosis in a proton exchange membrane fuel cell (PEMFC) system, a novel approach based on learning vector quantization neural network (LVQNN) and kernel principal component analysis (KPCA) is proposed. In the proposed approach, the KPCA method is used for processing strongly coupled fault data with a high dimension to reduce the data dimension and to extract new low-dimensional fault feature data. The LVQNN method is used to carry out fault recognition using the fault feature data. The effectiveness of the proposed fault detection method is validated using the experimental data of the PEMFC power system. Results show that the proposed method can quickly and accurately diagnose the three health states: normal state, water flooding failure and membrane dry failure, and the recognition accuracy can reach 96.93%. Therefore, the method proposed in this paper is suitable for processing the fault data with a high dimension and abundant quantities, and provides a reference for the application of water management subsystem fault diagnosis of PEMFC.