Equivalent Winding Capacitance Network for Transformer Transient Analysis Based on Standard Test Data

2017 ◽  
Vol 32 (4) ◽  
pp. 1899-1906 ◽  
Author(s):  
Afshin Rezaei-Zare
Keyword(s):  
Test Data ◽  
Transient Analysis ◽  
Standard Test

Test & Research on the Shearing Strength of the Continuous Seams in the Mortar-Less Fabricated Block & Masonry

2015 ◽  
Vol 777 ◽  
pp. 194-200
Author(s):  
Xi Xi He ◽  
Ye Lin
Keyword(s):  
Test Data ◽  
Concrete Block ◽  
Standard Test ◽  
Shear Loading ◽  
Shearing Strength ◽  
Loading Methods

Test & research on the shearing strength of the hollow mortar-less fabricated concrete block & masonry has been done in this article. A proposed formula has been put forward in this article by analyzing the influence of the shear loading methods on the shearing strength using the shearing test data of 27 standard test specimens’ continuous seams divided into 9 groups with 100% concrete infill ratio.

Enhancement of Voltage Profile By Using Static Synchronous Compensator (Statcom) in Power System Networks

2016 ◽  
Vol 8 (02) ◽  
pp. 109-120 ◽  
Author(s):  
Ziaur Rahman ◽  
Amit Tiwari
Keyword(s):  
Power System ◽  
Test Data ◽  
Reactive Power ◽  
Power Transmission ◽  
Standard Test ◽  
Transmission System ◽  
Load Flow ◽  
Voltage Profile ◽  
Static Synchronous Compensator ◽  
Bus System

Voltage profile is one of the concerned issues in power system network studies. The voltage profile decay can be experienced by the system when system is subjected to load increment or disturbances. Unscheduled increment of load variation in a power transmission system has driven the system to be stressful, leading to potential cascading trip on the entire system. and capacitor placement. In this paper we introduced the Static Synchronous Compensator (STATCOM), a shunt connected Flexible AC Transmission System (FACTS) device which is capable to regulate the voltage profile by generating or observing the reactive power. Our objective has been tested with different size and different location of STATCOM on IEEE-4 Bus System and IEEE-9 Bus System by using the Newton-Raphson load flow method in MATLAB environment. In this work, firstly we have analysed IEEE-4 bus system and IEEE-9 bus system under the standard test data and after that analysed IEEE- 4 bus system and IEEE-9 bus system with STATCOM under the standard test data. After that, we have compared all the load flow results and observed the effect of STATCOM on voltage profile The different sizes of STATCOM used in the test systems are 20,40,60,80and 100MVAr.

Aeroelastic Flutter Analysis of Linear Cascade Blades: STC5

2017 ◽  
Author(s):  
Kirubakaran Purushothaman ◽  
Sankar Kumar Jeyaraman ◽  
Sasikanta Parida ◽  
Kishore Prasad Deshkulkarni
Keyword(s):  
Test Data ◽  
Aerodynamic Force ◽  
Damping Ratio ◽  
Pressure Coefficient ◽  
Axial Compressor ◽  
Sensitivity Study ◽  
Standard Test ◽  
Test Configuration ◽  
Linear Cascade ◽  
Aerodynamic Damping

Study of aerodynamic flow and aeroelastic stability in vibrating blades of cascade is the main objective of this study. Standard test configuration (STC-5) was chosen for this study as it involves transonic flow regime in compressor blade cascades. CFD analysis were carried out for 11 test cases of STC-5 configuration and pressure coefficient values were compared with test data. The range of incidence angles vary from 2° to 10° and reduced frequency varies from 0.14 to 1.02. Inflow Mach number was fixed at 0.5 and Reynolds number was fixed at 1.4 × 106. Analysis of vibrating blades and comparison of test data results of axial compressor with linear cascade stator blades of fifth standard configuration at high subsonic speed is compared with CFD results. While doing this vibration of only the center blade is concerned when all the other blades in the cascade are fixed. Fluid structure interaction approach is used here to evaluate the unsteady aerodynamic force and work done for a vibrating blade in CFD domain. Energy method and work per cycle approach is adapted for aerodynamic damping prediction. A framework has been developed to estimate the work per cycle and aerodynamic damping ratio. Final sensitivity study was carried out to evaluate the influence of blade incidence and frequency on blade damping values.

Towards a Test Definition Language for Integrated Circuits

2015 ◽  
Vol 24 (03) ◽  
pp. 1550027
Author(s):  
Mohammad Alshayeb ◽  
Muhammad E. S. Elrabaa ◽  
Ayman Hroub ◽  
Amran Al-Aghbari ◽  
Aiman H. El-Maleh ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Programming Languages ◽  
Test Data ◽  
Standard Test ◽  
Pattern Generation ◽  
Test Equipment ◽  
Automatic Test ◽  
Test Procedures ◽  
Input Language ◽  
Extensible Markup

The Standard Test Interface Language (STIL) is the de-facto standard for transferring test data between the test generation environment and the test equipment. STIL's flexibility and extensibility facilitates its use as the sole input language for automatic test-pattern generation (ATPG). However, STIL format is complex and does not provide support for algorithmic interactive testing which necessitate the use of additional programming languages to do that. In this paper, we propose a new Test Definition Language for Integrated Circuits (TDLIC) based on the Extensible Markup Language (XML). TDLIC is a description language for defining tests of digital ICs in a precise and reusable form. The proposed TDLIC provides a common platform for specifying test data as well as complex test procedures. A case study that includes a validation platform is used to show the full capabilities of TDLIC. The validation platform is an FPGA-based system that emulates the automatic test equipment and a prototype IC with four circuits to be tested.

scholarly journals Effect of environment on HL parameter

1997 ◽  
Vol 78 (1) ◽  
pp. 58-59
Author(s):  
P. Kh. Dzhanashiya ◽  
V. A. Semenov ◽  
S. M. Zuev ◽  
V. K. Kornienkov ◽  
S. O. Nazlukhanyan ◽  
...  
Keyword(s):  
Test Data ◽  
Standard Test

The method of possible estimation of HL parameter according to the standard test data of tolerance to glucose or sugar curves as well as possible effect of environment is described.

scholarly journals Clinical Term Normalization Using Learned Edit Patterns and Subconcept Matching (Preprint)

2020 ◽  
Author(s):  
Rohit Kate
Keyword(s):  
Test Data ◽  
Edit Distance ◽  
Standard Test ◽  
Training Data ◽  
Shared Task ◽  
Clinical Text ◽  
System A ◽  
Semantic Types ◽  
The Given ◽  
Clinical Terminologies

BACKGROUND Clinical terms mentioned in clinical text are often not in their standardized forms as listed in clinical terminologies due to linguistic and stylistic variations. However, many downstream automated applications require clinical terms mapped to their corresponding concepts in clinical terminologies thus necessitating the task of clinical term normalization. OBJECTIVE In this paper, a system for clinical term normalization is presented which utilizes edit patterns to convert clinical terms into their normalized forms. METHODS The edit patterns are automatically learned from UMLS as well as from the given training data. The edit patterns are generalized sequences of edits which are derived from edit distance computations. The edit patterns are both character-based as well as word-based and are learned separately for different semantic types. Besides these edit patterns, the system also normalizes clinical terms through the subconcepts mentioned in them. RESULTS The system was evaluated on the MCN corpus as part of the 2019 n2c2 Track 3 shared task of clinical term normalization. It obtained 80.79% accuracy on the standard test data. The paper includes ablation studies to evaluate contributions of different components of the system. A challenging part of the task was disambiguation when a clinical term could be normalized to multiple concepts. CONCLUSIONS The learned edit patterns led the system to perform well on the normalization task. Given that the system is based on patterns, it is human-interpretable and is also capable of giving insights about common variations of clinical terms mentioned in clinical text that are different from their standardized forms. CLINICALTRIAL

Prediction of Perforation Efficiency in Gas Well Using Machine Learning

2021 ◽  
Author(s):  
Sukotrihadiyono Tejo ◽  
Yasutra Amega ◽  
Irawan Dedy
Keyword(s):  
Machine Learning ◽  
Test Data ◽  
Transient Analysis ◽  
Empirical Relation ◽  
Skin Damage ◽  
Gas Well ◽  
Pressure Transient Analysis ◽  
Pressure Transient ◽  
Rate Test ◽  
Short Time

Abstract The efficiency of perforation is an important aspect in gas well since it affects near wellbore pressure drop related to turbulent flow. The perforation efficiency is correlated with non-Darcy skin that is able to be distinguished by pressure transient analysis of isochronal test (Swift et al., 1962), or evaluated from multi-rate flow test data plot coefficients (Jones et al., 1976), or type curve of single build up test following constant-rate production (Spivey et al., 2004). A simple single rate pressure transient analysis which is supported by parameters derived from historical multi rate test data was also proven to differentiate skin damage and non-Darcy skin (Aminian et al., 2007). Unfortunately there are trade-offs between accurateness and analysis time in these aforementioned methods. Quick analysis of perforation efficiency is often needed during well completion and workover activities, to decide whether re-perforation job is required or not. To overcome the challenges of limited time for data acquisition and evaluation, an empirical relation between actual perforation length, skin damage, and laminar-turbulence flow coefficients that are obtained from short-time multi rate test is important to predict the perforation efficiency. The empirical relation will be developed using machine learning. A simple gas reservoir model is built and then run with variations of reservoir permeability, perforation interval length, near wellbore permeability, and vertical anisotropy to generate large numbers of hypothetical multi rate test data. The data set of laminar coefficient, turbulence coefficient, absolute open flow, skin damage, and perforation length will then be trained and tested to create empirical relation using supervised regression method which will afterwards be applied to several actual field cases. This study will elaborate the development of empirical relation of perforation efficiency with the distinct parameters obtained from simple short-time multi rate test data, what other factors will influence the empirical relation, as well as become the possible condition limit of the field application of the developed empirical relation.

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