scholarly journals SIMS prototype System 3 test results: engineering analysis

1978 ◽  
Author(s):  
Keyword(s):  
Prototype System ◽  
Test Results ◽  
Engineering Analysis

Design and Analysis of a High Power Density, Low Temperature Waste Heat Recovery System Using an Oil-Free Turboalternator

2010 ◽  
Author(s):  
James F. Walton ◽  
Andrew Hunsberger ◽  
Hooshang Heshmat
Keyword(s):  
Output Power ◽  
Waste Heat ◽  
Maximum Output Power ◽  
Output Power Level ◽  
Working Fluid ◽  
Prototype System ◽  
Low Grade ◽  
Maximum Output ◽  
Test Results ◽  
Study Results

In this paper the authors will present the design and preliminary test results for a distributed electric generating system that uses renewable energy source for economical load-following and peak-shaving capability in an oil-free, high-speed micro-turboalternator system using compliant foil bearings and a permanent magnet alternator. Test results achieved with the prototype system operating to full speed and under power generating mode will be presented. A comparison between predicted and measured electrical output will also be presented up to a power generating level of 25 kWe at approximately 55,000 rpm. The excellent correlation between design and test provides the basis for scale up to larger power levels. Based upon the turboalternator test results a thermodynamic cycle analysis of a system using low grade waste heat water at approximately 100 C will be reviewed. The tradeoff study results for a series of environmentally friendly refrigerant working fluids will also be presented including sensitivity to vaporization and condensing temperatures. Based on the cycle and pinch point analyses predicted maximum output power was determined. Finally a preliminary turbine design for the selected R134a working fluid was completed. The results of this study show that a net output power level of greater than 40 kW is possible for approximately 240 l/m flow of water at 100C is possible.

Development and Test of a Fuel Cell Based Micro-CHP System

2015 ◽  
Vol 1092-1093 ◽  
pp. 175-180
Author(s):  
Dong Lai Xie ◽  
Bing Qi Wang
Keyword(s):  
Fuel Cell ◽  
Natural Gas ◽  
Waste Heat ◽  
Thermal Power ◽  
Clean Energy ◽  
Prototype System ◽  
Test Results ◽  
Conversion Unit ◽  
Chp System ◽  
Auxiliary Unit

Fuel cell based micro combined heat and power (micro-CHP) systems are residential scale clean energy conversion unit. It employs fuel cells in a compact system that converts natural gas, propane or other fuels into both electricity and heat, which increases efficiency by simultaneously generating power and heat for one unit, on-site within a home. A prototype system consisting of a natural gas steam reforming unit, CO cleaning unit, PEM fuel cell stack, waste heat recovery unit and auxiliary unit is integrated. Test results of the prototype show that it can start within an hour and the syngas produced can meet the fuel cell’s requirements. The prototype’s electric power and thermal power are 200W and 530W respectively, while the electric and thermal efficiency are 15.4% and 40.9% respectively.

Autonomous System for Observation of QoS in Telecommunications Networks

1970 ◽  
Vol 111 (5) ◽  
pp. 15-18
Author(s):  
A. Kajackas ◽  
V. Batkauskas ◽  
A. Saltis ◽  
D. Gursnys
Keyword(s):  
Data Collection ◽  
Initial Data ◽  
Monitoring System ◽  
Autonomous System ◽  
Prototype System ◽  
Test Results ◽  
Telecommunications Networks ◽  
Software Programs ◽  
Evaluation And Monitoring ◽  
Qos Evaluation

A project of creation of a multi-dimension and autonomous QoS evaluation and monitoring system is presented in the paper. The initial data for evaluation of the QoS is collected from users using specially created software programs - iQoS modules. Singularities of the initial data collection are discussed. Test results of the prototype system are presented. Ill. 2, bibl. 14 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.111.5.347

scholarly journals SYLLABLE-BASED CHINESE TEXT/SPOKEN DOCUMENT RETRIEVAL USING TEXT/SPEECH QUERIES

2000 ◽  
Vol 14 (05) ◽  
pp. 603-616 ◽  
Author(s):  
BO-REN BAI ◽  
BERLIN CHEN ◽  
HSIN-MIN WANG
Keyword(s):  
Chinese Text ◽  
Chinese Language ◽  
Document Retrieval ◽  
Prototype System ◽  
Test Results ◽  
Spoken Document Retrieval ◽  
Novel Approach ◽  
Statistical Similarity ◽  
User Friendly ◽  
Spoken Documents

In light of the rapid growth of Chinese information resources on the Internet, this study investigates a novel approach that deals with the problem of Chinese text and spoken document retrieval using both text and speech queries. By properly utilizing the monosyllabic structure of the Chinese language, the proposed approach estimates the statistical similarity between the text/speech queries and the text/spoken documents at the phonetic level using the syllable-based statistical information. The investigation successfully implemented a prototype system with an interface supporting some user-friendly functions and the initial test results demonstrate the feasibility of the proposed approach.

scholarly journals Design of Prototype System for Temperature and Humidity Control in Flour Storage

2017 ◽  
Vol 5 (2) ◽  
pp. 59-64
Author(s):  
Annisau Saidah
Keyword(s):  
Wheat Flour ◽  
Load Cell ◽  
Sensor Data ◽  
Prototype System ◽  
Mold Growth ◽  
Test Results ◽  
Linear Formula ◽  
Temperature And Humidity ◽  
Cell Test ◽  
First In First Out

Storage of wheat flour requires good temperature and humidity to avoid mold growth that can damage the nutrients in wheat flour. The temperatures and humidity required for proper storage are above temperatures and humidity below 60% RH. The method used in flour storage is FIFO (First In First Out) using a Load cell sensor as a marker for flour input. The incoming flour will input the time, location and amount of flour, so that it can be easily determined which flour will come out first. To facilitate monitoring of temperature, humidity and stock amount in flour storage in this study, sending monitoring data wirelessly using an internet network that can be accessed anywhere. The test results of this study show that the DHT22 sensor can measure temperature and humidity well, which has a RE (Relative Error) value of 0.5% temperature and 3.9% humidity compared to the HTC-1 measuring instrument. The load cell test compared to digital scales has an accurate value using a linear formula. In the QoS test, sending sensor data to the web server has a good value according to the ITU-T standard, namely delay <150ms

scholarly journals Re-ranking the Twitter search result.

2021 ◽  
Author(s):  
Prerna Pathak
Keyword(s):  
Online Survey ◽  
Prototype System ◽  
Test Results ◽  
Good Evaluation ◽  
Search Result ◽  
User Query ◽  
Average Improvement ◽  
Other Information ◽  
Social Sharing ◽  
Feedback Data

Social Sharing Platforms, a great source of free and diverse information, have been center of attraction to many people. Users post their opinions, thoughts, life events, news and all other information. This data flowed into these systems has increased to such a limit making nearly impossible for a user to read all or even most of it, analyzing and utilize it. As a solution to this problem, we here are proposing an approach, which makes use of not only the tweets themselves but also their properties to re-rank the tweets given a user query. The proposed approach was implemented in a prototype system and test results were generated. A set of feedback data collected via online survey for those test results provides a good evaluation score, with an average improvement of around 10% on precision values after removing the outliers. It shows that our approach can generate improved results over the original ones.

scholarly journals Facial Recognition on System Prototype to Verify Users using Eigenface, Viola-Jones and Haar

2021 ◽  
Vol 3 (2) ◽  
pp. 213-222
Author(s):  
Robin Robin ◽  
Aldrick Handinata ◽  
Wenripin Chandra
Keyword(s):  
Face Recognition ◽  
Face Detection ◽  
Facial Recognition ◽  
Prototype System ◽  
Body Parts ◽  
Test Results ◽  
Haar Feature ◽  
System Prototype

Facial recognition is one of the most popular way to authenticate user into a system. This method is preferable considering the tendency of users for using the same password across multiple sites which made the user has already made his own account securities in vulnerable states. Using biometrics might supply solutions to solve this problem and facial recognition is one of the best biometric methods can be apply as a digital account security solution. This study to design a prototype system implementing facial recognition to verify users to measure how accurate these methods are. The method used here is Viola-Jones for face detection, Eigenface and Haar feature for face recognition from the OpenCV. The system was designed in Java. Based on the test results from the system designed, system can recognize user face with 100% accuracy if faces are shot in a well desirable condition. The system is able to recognize the user's face with various expressions including with or without glasses. However, the system has difficulty in recognizing user’s face in facing up, down, sideways position or blocked by accessories or body parts such as hands. After some experiment, it was proven that the system designed is accurate, reliable and safe enough to be implemented to digital authorization process.

Design and Test of a Semi-Passive Flow Control Device for Inlet Distortion Suppression

2000 ◽  
Author(s):  
Link C. Jaw ◽  
William T. Cousins ◽  
Dong N. Wu ◽  
David J. Bryg
Keyword(s):  
Stability Limit ◽  
Stability Margin ◽  
Aircraft Engine ◽  
Major Effect ◽  
Prototype System ◽  
Test Results ◽  
Inlet Distortion ◽  
Temperature And Pressure ◽  
The Stability ◽  
Suppression System

Advanced turbine engines often operate with reduced stability margin to increase performance. Aircraft engine temperature and pressure inlet distortion has a major effect upon the stability of the compression system. Suppression of inlet distortion can provide greater stability margin for the engine, thereby reducing operability restrictions on the engine by allowing closer operation to the stability limit. SMI has designed and tested a semi-passive distortion suppression system. The system uses flow injection to modify temperature and pressure inlet distortion. The prototype system was tested on a Honeywell T55 compressor rig. This paper presents both the design of the system and the test results. The test results show that this semi-passive distortion suppression system was able to reduce the surge margin degradation caused by the presence of pressure or temperature distortion. Special design considerations for this type of system are discussed, based upon the results of the prototype test. It is shown that distortion control can be a viable addition to the design of an aircraft engine.

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