Quantization

Part 1 of book "Introduction to Data Compression (Third edition)" provide with knowledge about: introduction; mathematical preliminaries for lossless compression; huffman coding; arithmetic coding; dictionary techniques; context-based compression; lossless image compression; mathematical preliminaries for lossy coding; scalar quantization; vector quantization;...

347p britaikridanik 05-07-2022 1 1   Download

We developed a chemical cleavage method that releases single nucleosome dyad-containing fragments, allowing us to precisely map both single nucleosomes and linkers with high accuracy genome-wide in yeast.

20p vialfrednobel 29-01-2022 5 0   Download

Mục tiêu của đề tài là xây dựng một hệ thống nhận dạng mặt hoàn toàn tự động với dữ liệu đầu vào là các ảnh mặt người sử dụng LPQ, một phương pháp trích chọn đặc trưng ảnh mặt có khả năng làm việc tốt với các ảnh bị mờ hay bị ảnh hưởng bởi ánh sáng. Hệ thống sẽ gồm các module thực hiện: phát hiện vùng ảnh mặt, tiền xử lý, trích chọn đặc trưng, học và nhận dạng.

43p bobietbay 22-12-2021 9 2   Download

This paper investigates the performance of the 1-bit ADC in the wireless coded communication systems where the robust channel coding, protograph low-density parity-check code (LDPC), is employed. The investigation reveals that the performance of the conventional 1-bit ADC with the truncation limit of 3-sigma is severely destroyed by the quantization distortion even when the number of antennas increases to 100.

10p spiritedaway36 28-11-2021 2 0   Download

Lecture Data Communication: Lesson 16 present the content: analog-to-digital conversion, pulse amplitude modulation (PAM), pulse code modulation (PCM), quantization, binary encoding, digital-to-digital conversion,...

30p bachdangky 06-09-2021 3 0   Download

Lecture Physics A2: Wave-Particle Duality - Huynh Quang Linh. After studying this section will help you understand: photoelectric effect - light as particles (“Quantization of EM waves”), photon momentum/compton scattering, wave-particle duality, weird quantumness,...

42p gongyuefei 10-08-2021 10 0   Download

Fast matching is a crucial task in many computer vision applications due to its computationally intensive overhead, especially for high feature spaces. Promising techniques to address this problem have been investigated in the literature such as product quantization, hierarchical clustering decomposition, etc.

7p viaespa2711 31-07-2021 1 0   Download

This paper investigates the performance of the 1-bit ADC in the wireless coded communication systems where the robust channel coding, protograph low-density parity-check code (LDPC), is employed. The investigation reveals that the performance of the conventional 1-bit ADC with the truncation limit of 3-sigma is severely destroyed by the quantization distortion even when the number of antennas increases to 100.

10p nguaconbaynhay11 07-04-2021 11 0   Download

Intersubband optical absorption spectrum was studied in quantum well structures in quantizing magnetic field tilted with respect to the structure layers. Violation of the selection rule forbidding optical intersubband transitions in structures made of quantum wells with an asymmetric potential is proposed. The importance of asymmetric structure design to achieve considerable values of optical absorption is demonstrated.

7p trinhthamhodang1217 12-01-2021 26 1   Download

In this paper we use the method of the second quantization to investigate possibility of superfluidity formation in the asymmetric nuclear matter. Using quasi-spin formalism to study the problem of deuteron condensation and applying the Hatree - Fock - Bogoliubov approximation to investigate the exceeding neutron system in the deuteron condensation.

13p larachdumlanat127 20-12-2020 3 0   Download

This paper studies the effects of nonlinear distortion of Low Noise Amplifier (LNA) in the multichannel direct-RF sampling receiver (DRF). The main focus of our work is to study and compare the effectiveness of the different adaptive compensation algorithms, including the inverse-based and subtract-based Least Mean Square (LMS) algorithm with a fixed and variable step size. The models for the compensation circuits have been analytically derived. As the major improvements, the effectiveness of the compensation circuits under the ADC quantization noise effect is evaluated.

12p trinhthamhodang9 10-12-2020 5 1   Download

In this paper, a new classification framework based on SOM is introduced. In this approach, SOM is combined with the learning vector quantization (LVQ) to form a modified version of the SOM classifier, SOM-LVQ. The classification system is improved by applying an adaptive boosting algorithm with base learners to be SOM-LVQ classifiers.

6p kequaidan8 02-11-2020 3 0   Download

By means of the second quantization formalism, the condensate density of an infinite Bose gas and finite Bose gas is studied in the broken phase. Our results show that the compactification in one-direction makes the remarkable changes in the condensate density.

8p koxih_kothogmih5 04-09-2020 6 0   Download

After studying this chapter you will be able to understand: Frequency spectrum of an image, explain the sampling of the 2 dimension image, the second stage of the digitization process, in the first sampling and in the second quantization of each of the samples, optimum mean square error or lloyd-max quantizer, designing of an optimum quantizer with the given signal probability density function.

45p nanhankhuoctai8 23-06-2020 9 2   Download

After studying this chapter you will be able to understand: Need for the digitization, to digitize the image, sampling, quantization, how to digitize an image? Why do we need to digitization? What is digitization? How to digitize an image?

47p nanhankhuoctai8 23-06-2020 8 0   Download

Water is one of the most essential commodities for mankind and the largest available source of fresh water lays underground. Tremendous increase in the agricultural, industrial and domestic activities in recent years has increased the demand for good quality water to meet the growing needs. Groundwater is mostly preferred to meet this growing demand because of its lower level of contamination and wider distribution. The occurrence of groundwater is a consequence of the interaction of the climatic, geological, hydrological and physiographical factors.

8p quenchua6 15-06-2020 11 0   Download

We consider a mechanism for removing tachyon field in bosonic string based on some modification of the structure of the commutation relations between coordinate orbital oscillators. This change causes the shifting of the mass spectrum for the component fields of the string field functional.

6p 12120609 01-06-2020 9 2   Download

In this work, 73 cervical cell images that consist of 50 normal images and 23 cancer images are used. 35 normal images and 14 cancer images are used to train the LVQ. Then, 23 normal images and 9 cancer images are used in the testing process. Our results show 88.89 % cancer image can be detected correctly (sensitivity), 100 % normal image can be detected correctly (specificity), and 95.83% for overall detection (accuracy).

5p lucastanguyen 28-05-2020 4 0   Download

Bài báo đề xuất một hệ thống nhận dạng giới tính từ ảnh mặt người hoàn toàn tự động dựa trên việc sử dụng phương pháp trích xuất đặc trưng LPQ (Local Phase Quantization). Từ ảnh input, phần ảnh khuôn mặt người sẽ được phát hiện tự động bằng cách sử dụng các đặc trưng HOG (Histogram of Oriented Gradients). Tiếp đến, các ảnh mặt sẽ được chuẩn hóa về cùng điều kiện ánh sáng bằng kỹ thuật retinal filter. Ở bước trích chọn đặc trưng, phương pháp LPQ sẽ được sử dụng nhằm trích chọn các đặc trưng cục bộ quan trọng nhất của khuôn mặt.

8p quenchua5 17-05-2020 43 1   Download

Speaker recognition is a biometric technique to recognize people’s identity based on their voice signal. A recognition system has two main requirements, which are high accuracy recognition rate and short processing time under large amount of training data. This paper propose a method to solve the two above requirements by performing a combination of two advantages of each VQ and GMM model to provide a new model can be called a “Hybrid VQ/GMM-UBM model”.

8p covid19 11-05-2020 17 0   Download