scholarly journals Conflict Resolution for Product Performance Requirements Based on Propagation Analysis in the Extension Theory

2014 ◽  
Vol 6 ◽  
pp. 589345 ◽  
Author(s):  
Yanwei Zhao ◽  
Huanhuan Hong ◽  
Gaochao Jiang ◽  
Weigang Chen ◽  
Hongwei Wang
Keyword(s):  
Extension Theory ◽  
Strategy Development ◽  
Prototype System ◽  
Performance Requirements ◽  
Static Data ◽  
Propagation Analysis ◽  
Before And After ◽  
Compressor Performance ◽  
Intake Pressure ◽  
Design Conflicts

Traditional product data mining methods are mainly focused on the static data. Performance requirements are generally met as possible by finding some cases and changing their structures. However, when one is satisfied with the structures changed, the other effects are not taken into account by analyzing the correlations; that is, design conflicts are not identified and resolved. An approach to resolving the conflict problems is proposed based on propagation analysis in Extension Theory. Firstly, the extension distance is improved to better fit evaluating the similarity among cases, then, a case retrieval method is developed. Secondly, the transformations that can be made on selected cases are formulated by understanding the conflict natures in the different performance requirements, which leads to the extension transformation strategy development for coordinating conflicts using propagation analysis. Thirdly, the effects and levels of propagation are determined by analyzing the performance values before and after the transformations, thus the co-existing conflict coordination strategy of multiple performances is developed. The method has been implemented in a working prototype system for supporting decision-making. And it has been demonstrated the feasible and effective through resolving the conflicts of noise, exhaust, weight and intake pressure for the screw air compressor performance design.

scholarly journals Simulation of Compressor Performance Deterioration due to Erosion

1989 ◽  
Author(s):  
W. Tabakoff ◽  
A. N. Lakshminarasimha ◽  
M. Pasin
Keyword(s):  
Fault Model ◽  
Experimental Results ◽  
Performance Tests ◽  
Individual Stage ◽  
One Stage ◽  
Before And After ◽  
Performance Deterioration ◽  
Compressor Performance ◽  
Multistage Compressor ◽  
The Individual

Experimental results obtained from cascades and one stage compressor performance tests before and after erosion were used to test a fault model to represent erosion. This model was implemented on a stage stacking program developed to demonstrate the effect of erosion in a multistage compressor. The effect of the individual stage erosion on the overall compressor performance is also demonstrated.

Study on Characteristics of the Linear Air-Conditioner Compressor at Varied Operating Conditions

2011 ◽  
Vol 201-203 ◽  
pp. 632-636 ◽  
Author(s):  
Jie Fei Xie ◽  
Xin Hua Li ◽  
Hong Zhang
Keyword(s):  
Engineering Application ◽  
Axial Direction ◽  
Operating Conditions ◽  
Air Conditioner ◽  
Design Development ◽  
Runge Kutta Method ◽  
Moving Body ◽  
Cylinder Piston ◽  
Compressor Performance ◽  
Intake Pressure

This paper mainly introduces a novel linear air conditioner compressor which is driven by the linear oscillatory motor with two divided moving body, of which the Cylinder-piston assembly presents symmetrical distribution along the axial direction. The compressor dynamics equations were built and solved numerically with the fourth order Runge-Kutta method. in the meantime, this paper emphatically analyzes the influence of those factors, such as the intake pressure, the exhaust pressure, the suction gas superheat, the cooling degree, on the compressor performance at varied operating conditions. These works shows that improving the suction gas pressure and reducing the exhuast pressure can help to increase the refrigeration capacity and energy efficiency ratio of the air conditioner compressor. Those analysis results provide theory foundation for design,development, and engineering application of this linear air-conditioner compressor.

Development of a J2EE Web Application for STEP-Based Design Conformance Checking

2004 ◽  
Author(s):  
Q. Z. Yang ◽  
W. F. Lu
Keyword(s):  
Problem Solving ◽  
Collaborative Design ◽  
Web Application ◽  
Collaborative Problem Solving ◽  
Prototype System ◽  
Conformance Checking ◽  
3D Cad ◽  
Functional Teams ◽  
Process Detection ◽  
Design Conflicts

Product design needs great team efforts from multi-disciplinary participants, even external partners, for collaborative problem solving. Design conflicts within and between functional teams do occur in such a collaborative design process. Detection and resolution of design conflicts through design conformance checking therefore becomes a critical activity in the joint design problem solving. This paper presents the development of a J2EE application prototype to support the STEP-based design conformance checking. A STEP-compliant information model has been specified to represent 3D CAD objects and other design information, while a knowledge representation model been proposed to describe design rules and constraints. The STEP objects and rule objects are managed and processed by the enterprise Java beans of a J2EE application server, which continuously applies the rule objects to the STEP objects and finally draws a conclusion for the design conformance checking. Application scenarios are discussed in the paper to illustrate the effectiveness of both the STEP/rule objects modeling approaches and the prototype system for support of the design compliance checking in distributed environment.

scholarly journals Digital image display station performance requirements based on physician experience with a prototype system

1989 ◽  
Vol 2 (3) ◽  
pp. 150-155 ◽  
Author(s):  
Paul Fisher ◽  
Brent Grover ◽  
Gerhard Brauer ◽  
Gordon Ritchie
Keyword(s):  
Digital Image ◽  
Image Display ◽  
Prototype System ◽  
Performance Requirements ◽  
Display Station

Improved Medical Student Engagement with EHR Documentation following the 2018 Centers for Medicare and Medicaid Billing Changes

2021 ◽  
Vol 12 (03) ◽  
pp. 582-588
Author(s):  
Lindsay A. Stevens ◽  
Natalie M. Pageler ◽  
Jin S. Hahn
Keyword(s):  
Medical Student ◽  
Student Engagement ◽  
Medical Students ◽  
Writing Process ◽  
Health Record ◽  
Training Process ◽  
Performance Requirements ◽  
Physical Presence ◽  
Before And After ◽  
Attending Physicians

Abstract Background Medical student note writing is an important part of the training process but has suffered in the electronic health record (EHR) era as a result of student notes being excluded from the billable encounter. The 2018 CMS billing changes allow for medical student notes to be used for billable services provided that physical presence requirements are met, and attending physicians satisfy performance requirements and verify documentation. This has the potential to improve medical student engagement and decrease physician documentation burden. Methods Our institution implemented medical student notes as part of the billable encounter in August 2018 with support of our compliance department. Note characteristics including number, type, length, and time in note were analyzed before and after implementation. Rotating medical students were surveyed regarding their experience following implementation. Results There was a statistically significant increase in the number of student-authored notes following implementation. Attending physicians' interactions with student notes greatly increased following the change (4% of student notes reviewed vs. 84% of student notes). Surveyed students reported that having their notes as part of the billable record made their notes more meaningful and enhanced their learning. The majority of surveyed students also agreed that they received more feedback following the change. Conclusion Medical students are interested in writing notes for education and feedback. Inclusion of their notes as part of the billable record can facilitate their learning and increase their participation in the note writing process.

Performance Degradation due to Fouling and Recovery After Washing in a Multistage Test Compressor

2020 ◽  
Author(s):  
Nicola Casari ◽  
Michele Pinelli ◽  
Pier Ruggero Spina ◽  
Alessio Suman ◽  
Alessandro Vulpio
Keyword(s):  
Characteristic Curve ◽  
Pressure Ratio ◽  
Performance Curve ◽  
Internal Surfaces ◽  
Gradual Loss ◽  
Before And After ◽  
Stator Vane ◽  
Compressor Performance ◽  
Multistage Test ◽  
Dust Ingestion

Abstract Land-based power units have to fulfill even more high levels of production and reliability. In harsh environments (desert and tropical installations, typically), the power unit ingests high amounts of dust that might deposit inside the compressor. In this paper, the analysis of a multistage compressor performance that operates under sandy and humid conditions has been assessed. The compressor units, that equips the Allison 250 C18 compressor, has been subjected to multiple runs under severe conditions of soil dust ingestion. The compressor has been operated according to subsequent runs and at the end of each run, the performance curve was recorded and the performance losses, in terms of pressure ratio, have been measured during the operations. The characteristic curve of each run is representative of the level of contamination of the unit. Finally, the compressor has been washed and the performance curve, in the recovered conditions, has been recorded. The results show the modification and the downward shift of the characteristic curves which lead to a gradual loss of the compressor performance. The curves realized after dust ingestion have been compared with the recovered curve after online washing. The measurement shows a promising recovery of the performances, even if, the compressor flow path appears affected by localized deposits able to resist to the droplet removal action. Detailed photographic reports of the IGV and the first compressor stages have been included in this analysis. After each run, the IGV, the rotor blade and stator vane of the first stage and the hub and the shroud surfaces have been photographed. The pictures show the deposition patterns on the blades and the compressor surfaces. The comparison of the pictures of the internal surfaces, before and after the washing, highlights the parts that are more critical to clean and needy of attention during offline washing and overhaul.

scholarly journals Perancangan sistem pemantauan surat izin praktik (SIP) tenaga kesehatan di Dinas Kesehatan Kabupaten Pringsewu Provinsi Lampung

2017 ◽  
Vol 33 (8) ◽  
pp. 417 ◽  
Author(s):  
Faridz Ramadan ◽  
Eko Nugroho
Keyword(s):  
Monitoring System ◽  
Health Workers ◽  
Employee Performance ◽  
Professional Organizations ◽  
Testing System ◽  
Prototype System ◽  
Functional Testing ◽  
District Health ◽  
Before And After ◽  
Improved Performance

The design of monitoring system of health workers’ practice license in health office in Pringsewu LampungPurposeThe purpose of this study was to design a prototype of a monitoring system of health practice licenses (SIP) of health workers in Pringsewu’s local government. MethodsAn action research was conducted with 15 subjects. Data collection was done through in-depth interviews, observations and focus group discussions.ResultsBy order of priority issues, value urgency showed 70%, seriousness 75% and growth 75%, and the ultrasound matrix (urgency, seriousness and growth) showed that it is necessary to design a prototype monitoring SIP (100%), access to online or offline (66.66%), mapping of health workers (60%), and integration and communication with professional organizations and the Ministry of Health of Indonesia (60%). One of the functional testing systems that can be used is the SIP monitoring system. Furthermore, considering the system functional testing system the results showed 58% strongly agreed and 42% agreed with the use of the SIP designed monitoring system. The evaluation of the feasibility of the system shows that the aspect ratio before and after using the prototype was 5 times faster than before using the system. This system provides a positive effect on employee performance and can simplify management of managerial data licensing health professionals. ConclusionThe designed prototype system for monitoring practice licenses has overcome one of the problems in the regulatory process concerning the licensing of health personnel, although it is not developed fully, but the prototype is enough to give change and improved performance at the district health office in Pringsewu.

Performance Degradation Due to Fouling and Recovery After Washing in a Multistage Test Compressor

2021 ◽  
Vol 143 (3) ◽  
Author(s):  
Nicola Casari ◽  
Michele Pinelli ◽  
Pier Ruggero Spina ◽  
Alessio Suman ◽  
Alessandro Vulpio
Keyword(s):  
Guide Vane ◽  
Characteristic Curve ◽  
Pressure Ratio ◽  
Inlet Guide Vane ◽  
Performance Curve ◽  
Internal Surfaces ◽  
Before And After ◽  
Stator Vane ◽  
Compressor Performance ◽  
Dust Ingestion

Abstract Land-based power units have to fulfill even more high levels of production and reliability. In harsh environments (desert and tropical installations, typically), the power unit ingests high amounts of dust that might deposit inside the compressor. In this paper, the analysis of a multistage compressor performance that operates under sandy and humid conditions has been assessed. The compressor units, which equips the Allison 250 C18 compressor, has been subjected to multiple runs under severe conditions of soil dust ingestion. The compressor has been operated according to subsequent runs, and at the end of each run, the performance curve was recorded; the performance losses, in terms of pressure ratio, have been measured during the operations. The characteristic curve of each run is representative of the level of contamination of the unit. Finally, the compressor has been washed, and the performance curve, in the recovered conditions, has been recorded. The results show the modification and the downward shift of the characteristic curves which lead to a gradual loss of the compressor performance. The curves realized after dust ingestion have been compared with the recovered curve after online washing. The measurement shows a promising recovery of the performances, even if the compressor flow path appears affected by localized deposits able to resist to the droplet removal action. Detailed photographic reports of the inlet guide vane (IGV) and the first compressor stages have been included in this analysis. After each run, the IGV, the rotor blade and stator vane of the first stage, and the hub and the shroud surfaces have been photographed. The pictures show the deposition patterns on the blades and the compressor surfaces. The comparison of the pictures of the internal surfaces, before and after the washing, highlights the parts that are more critical to clean and needy of attention during offline washing and overhaul.

Reaction Mechanisms in Organic Binder Removal During Ceramic Processing: PMMA/Cordierite as a Prototype System

1987 ◽  
Vol 108 ◽  
Author(s):  
William E. Farnethe ◽  
Ralph H. Staley ◽  
Theodore Budzichowski
Keyword(s):  
Small Molecules ◽  
Tape Casting ◽  
Prototype System ◽  
Extensive Literature ◽  
Ceramic Processing ◽  
Binder Removal ◽  
Performance Requirements ◽  
Ceramic Surfaces ◽  
Ceramic Components ◽  
Materials Used

As the performance requirements of ceramic components are refined, the demands placed on the materials used in their processing also become more stringent. For example, in advanced ceramic packaging applications, it is increasingly important that the organic polymers used as binders be capable of degradation and removal at low temperatures and in non-oxidizing atmospheres. This paper examines the chemistry that can occur during two fundamental stages of the binder removal process, (1) the breakdown of the C–C backbone of the polymer during pyrolysis, and (2) the interaction of the small molecules that are produced during pyrolysis with ceramic surfaces. The work has focused on acrylate and methacrylate systems, both because this is an important family of polymers for applications in tape casting, and because there is a relatively extensive literature on their pyrolysis chemistry.

Aerodynamic Development of a Radial Compressor for a 10-kw Turboalternator

1970 ◽  
Author(s):  
Colin Rodgers
Keyword(s):  
High Speed ◽  
Radial Compressor ◽  
Us Army ◽  
Design Performance ◽  
Performance Requirements ◽  
The Us ◽  
Compressor Performance ◽  
Axial Clearance

The aerodynamic development of a small high-speed radial compressor for the US Army 10-kw turboalternator is discussed, including initial performance deficiencies arising from blade contour discrepancies. Design performance requirements were attained by correcting these discrepancies and subsequently were exceeded with further geometry refinements. Aerodynamic testing included an investigation concerning the effect of shroud axial clearance on compressor performance and showed that abradable shrouds are desirable for small compressors.

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