PROGRESS IN PHYSIOLOGICAL ACOUSTICS

2013 ◽  
Vol 13 (05) ◽  
pp. 1340007 ◽  
Author(s):  
FUYIN MA ◽  
JIU HUI WU ◽  
HAIYUN HOU
Keyword(s):  
Experimental Testing ◽  
Critical Band ◽  
Simulation Methods ◽  
Acoustic Model ◽  
Analysis Method ◽  
Biological Factors ◽  
Physical Acoustics ◽  
Physiological Acoustics ◽  
Numerical Simulation Methods ◽  
Evaluation Survey

Physiological acoustics is a very hot topic in modern acoustic research, which is to study the hearing mechanism and the utterance of both humans and animals. It could be divided into two main aspects: physical acoustics of the ear and physiological acoustics. In physiological acoustics, there are some common research methods, such as objective experimental testing, subjective feelings evaluation survey statistical method, building the physical acoustic model and numerical simulation methods, etc. The authors are researching the accurate mathematical model of equal loudness curves, critical band and masking effects, by applying the holographic concept with several biological factors which are required to build a standard model. The cochlear emission information should be extracted from wavelet analysis method and two hearing protection technologies are being developed by band shielding.

Methodology for Designing Low-Vibration Structures for Movable Mechanisms

1999 ◽  
Author(s):  
Shinobu Yoshida ◽  
Yoshiko Kawabe
Keyword(s):  
Numerical Simulation ◽  
Vibration Analysis ◽  
Simulation Method ◽  
Optimization Method ◽  
Structural Vibration ◽  
Simulation Methods ◽  
Analysis Method ◽  
Module Design ◽  
Numerical Simulation Methods ◽  
Design Steps

Abstract The methodology dealt with here is the way how to use numerical simulation methods corresponding to different design steps. The methods are a budget simulation method for mechanical specification design step, a structural vibration analysis method using a finite element method and an optimization method. The latter two methods are used for the module design and parts design steps. Case studies reviewing the works of authors show the effectiveness of the methodology.

An Implicit Algorithm of Solving Nonlinear Filtering Problems

2014 ◽  
Vol 16 (2) ◽  
pp. 382-402
Author(s):  
Feng Bao ◽  
Yanzhao Cao ◽  
Xiaoying Han
Keyword(s):  
Kalman Filter ◽  
Particle Filter ◽  
Nonlinear Filtering ◽  
State Equation ◽  
Nonlinear Filter ◽  
Filter Method ◽  
Simulation Methods ◽  
Current State ◽  
Numerical Simulation Methods ◽  
Kalman Filter Method

AbstractNonlinear filter problems arise in many applications such as communications and signal processing. Commonly used numerical simulation methods include Kalman filter method, particle filter method, etc. In this paper a novel numerical algorithm is constructed based on samples of the current state obtained by solving the state equation implicitly. Numerical experiments demonstrate that our algorithm is more accurate than the Kalman filter and more stable than the particle filter.

scholarly journals CELTA Course from the Perspective of EFL Instructors: A Case Study

2021 ◽  
Vol 4 (4) ◽  
Author(s):  
Tolga Çay ◽  
◽  
Cenk AKAY ◽  
Keyword(s):  
Qualitative Data ◽  
Single Case ◽  
Descriptive Analysis ◽  
Private University ◽  
Course Evaluation ◽  
Single Case Study ◽  
Analysis Method ◽  
Content Analysis Method ◽  
Evaluation Survey

The aim of this study is to explore the CELTA course from the perspective of EFL instructors. A single case study of qualitative research methods is employed in the study. The sample consists of 6 EFL instructors working for a private university in Turkey. The quantitative data of the research was obtained through course evaluation survey. Qualitative data was gathered by open-ended questions and interview forms developed by the researcher and also with the documents. Descriptive analysis was performed to show evaluation of the course in the quantitative phase of the research. On the other hand, the content analysis method was applied in the analysis of qualitative data. As a result of the study, the CELTA course is useful for EFL instructors’ careers; nevertheless the course components and content should be redesigned considering andragogic principles. Moreover, EFL instructors were pleased to take the course at the end of the course although the course’s weaknesses.

Analysis of Droplet Impingement Characteristics of Aero-Engine Nose Cone With Hot Air Film

2016 ◽  
Author(s):  
Huiyun Yang ◽  
Peng Ke ◽  
Chunxin Yang
Keyword(s):  
Droplet Diameter ◽  
Simulation Methods ◽  
Droplet Impingement ◽  
Blowing Ratio ◽  
Hot Air ◽  
Impingement Heat Transfer ◽  
Aero Engine ◽  
Nose Cone ◽  
Numerical Simulation Methods ◽  
Air Film

A new nose cone ice protection configuration with hot air film slot was investigated, where the surface need to be protected could be heated with interior impingement heat transfer and exterior hot air film. Numerical simulation methods using computational fluid dynamics code were developed and validated to find the effects of the jetted air film on the droplet impingement characteristics. Combination of two-dimensional axisymmetric algorithm and Lagrangian method were adopted to solve the air flow field and the droplet trajectories. The simulation methods were validated with the results from the experimental data. The droplet impingement characteristics on two structures were investigated respectively, the intact cone without film slot and the slotted cone. Results show that the surface local collection coefficient changes significantly behind the film slot because of the blowing effect of the air film on the incoming droplets, and the variation of the local collection coefficient is very dependent on the droplet diameter for a given blowing ratio, or the blowing ratio for a given droplet size. Some different effects, such as “fully blowing-off”, “blowing behind” and “limited blowing-off”, may happen for different combination of droplets size and blowing ratio. Compared with the cone without film slot, the blowing effect is more significant for smaller droplets or higher blowing ratio. Besides that, the total collection coefficient maybe only half of those without film for some conditions.

Achieving better cooling of turbine blades using numerical simulation methods

2013 ◽  
Vol 60 (2) ◽  
pp. 92-97
Author(s):  
A. A. Inozemtsev ◽  
A. S. Tikhonov ◽  
C. I. Sendyurev ◽  
N. Yu. Samokhvalov
Keyword(s):  
Numerical Simulation ◽  
Turbine Blades ◽  
Simulation Methods ◽  
Numerical Simulation Methods
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