PERFORMANCE EVALUATION OF VENTILATION SYSTEM OF EXISTING HOUSES BY VENTILATION EFFECTIVENESS : Study on simple measurement method of age of air, assuming uniform mixture model

The present paper aims at performance evaluation of Doubly Truncated Generalized Laplace Mixture Model and K-Means clustering (DTGLMM-K) for image analysis concerned to various practical applications like security, surveillance, medical diagnostics and other areas. Among the many algorithms designed and developed for image segmentation the dominance of Gaussian Mixture Model (GMM) has been predominant which has the major drawback of suiting to a particular kind of data. Therefore the present work aims at development of DTGLMM-K algorithm which can be suitable for wide variety of applications and data. Performance evaluation of the developed algorithm has been donethrough various measures like Probabilistic Rand index (PRI), Global Consistency Error (GCE) and Variation of Information (VOI). During the current work case studies forvarious different images having pixel intensities has been carried out and the obtained results indicate the superiority of the developed algorithm for improved image segmentation.

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An Efficient Volumetric-Error Measurement Method for Five-Axis Machine Tools

Manufacturing Engineering and Materials Handling, Parts A and B ◽

10.1115/imece2005-83000 ◽

2005 ◽

Author(s):

Shih-Ming Wang ◽

Han-Jen Yu ◽

Hung-Wei Liao

Keyword(s):

Machine Tools ◽

Measurement Method ◽

Degrees Of Freedom ◽

High Efficiency ◽

Low Cost ◽

Volumetric Errors ◽

Different Types ◽

Measurement Methodology ◽

Simple Measurement ◽

Five Axis

Accurate measurement of volumetric errors plays an important role for error compensation for multi-axis machines. The error measurements for volumetric errors of five-axis machines are usually very complex and costly than that for three-axis machines. In this study, a direct and simple measurement method using telescoping ball-bar system for volumetric errors for different types of five-axis machines was developed. The method using two-step measurement methodology and incorporating with derived error models, can quickly determine the five degrees-of-freedom (DOF) volumetric errors of five-axis machine tools. Comparing to most of the current used measurement methods, the proposed method provides the advantages of low cost, high efficiency, easy setup, and high accuracy.

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Coupling Coefficient Measurement Method with Simple Procedures Using a Two-Port Network Analyzer for a Multi-Coil WPT System

Energies ◽

10.3390/en12203950 ◽

2019 ◽

Vol 12 (20) ◽

pp. 3950

Author(s):

Seon-Jae Jeon ◽

Dong-Wook Seo

Keyword(s):

Coupling Coefficient ◽

Measurement Method ◽

Simple Procedure ◽

Measurement Procedure ◽

Network Analyzer ◽

Wireless Power ◽

S Parameter ◽

Coefficient Measurement ◽

Simple Measurement ◽

Definition Of

In this paper, we propose a measurement method with a simple procedure based on the definition of the impedance parameter using a two-port network analyzer. The main advantage of the proposed measurement method is that there is no limit on the number of measuring coils, and the method has a simple measurement procedure. To verify the proposed method, we measured the coupling coefficient among three coils with respect to the distance between the two farthest coils at 6.78 and 13.56 MHz, which are frequencies most common for a wireless power transfer (WPT) system in high-frequency band. As a result, the proposed method showed good agreement with results of the conventional S-parameter measurement methods.

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