SIMULATION, DESIGN, CONTROL AND OPTIMIZATION OF THERMAL PROCESSES

2010 ◽  
pp. 121-138
Keyword(s):  
Thermal Processes ◽  
Simulation Design

Forced Zero Cross-Loading Misspecifications in Measurement Component of Structural Equation Models

Methodology ◽  
2014 ◽  
Vol 10 (4) ◽  
pp. 138-152 ◽  
Author(s):  
Hsien-Yuan Hsu ◽  
Susan Troncoso Skidmore ◽  
Yan Li ◽  
Bruce Thompson
Keyword(s):  
Structural Equation ◽  
Structural Model ◽  
Structural Equation Models ◽  
Equation Model ◽  
Model Fit ◽  
Model Specification ◽  
Simulation Design ◽  
Measurement Models ◽  
Fit Statistics ◽  
Path Coefficients

The purpose of the present paper was to evaluate the effect of constraining near-zero parameter cross-loadings to zero in the measurement component of a structural equation model. A Monte Carlo 3 × 5 × 2 simulation design was conducted (i.e., sample sizes of 200, 600, and 1,000; parameter cross-loadings of 0.07, 0.10, 0.13, 0.16, and 0.19 misspecified to be zero; and parameter path coefficients in the structural model of either 0.50 or 0.70). Results indicated that factor pattern coefficients and factor covariances were overestimated in measurement models when near-zero parameter cross-loadings constrained to zero were higher than 0.13 in the population. Moreover, the path coefficients between factors were misestimated when the near-zero parameter cross-loadings constrained to zero were noteworthy. Our results add to the literature detailing the importance of testing individual model specification decisions, and not simply evaluating omnibus model fit statistics.

Simulation Design: Negotiation Learning Gains

2012 ◽  
Author(s):  
Noam Ebner ◽  
Daniel Druckman
Keyword(s):  
Learning Gains ◽  
Simulation Design

Research and Modelling on Electrical and Thermal Mode of LEDs Operation in the Luminaire

2018 ◽  
pp. 155-162 ◽  
Author(s):  
Sergei S. Kapitonov ◽  
Anastasia V. Kapitonova ◽  
Sergei Yu. Grigorovich ◽  
Sergei A. Medvedev ◽  
Taher Sobhy
Keyword(s):  
Thermal Conditions ◽  
Operating Mode ◽  
Thermal Processes ◽  
Thermal Mode ◽  
Crystal Temperature ◽  
Premature Failure ◽  
Model Based

In the article, the electrical and thermal processes in the LED lamp with varied parameters are investigated. Voltage and current measurements on all LEDs of the luminaire are carried out in the nominal operating mode. The power allocated to each LED is determined. The calculation of the LED crystal temperature was carried out using the developed thermal LED model based on the results of the measurements and by using “Multisim” program. It has been established that the temperature of the crystals of individual LEDs in the luminaire differ significantly, which leads to unfavourable thermal conditions for them and an increased likelihood of premature failure.

Simulation Design of Economic Processes

2011 ◽  
Vol 7 (1) ◽  
pp. 16-25
Author(s):  
O.Ye. Kuz'min ◽  
◽  
V.V. Kozik ◽  
Yu.I. Sidorov ◽  
V.E. Yerashok ◽  
...  
Keyword(s):  
Simulation Design

INFLUENCE OF HEAT TREATMENT OF MOUNTAIN MASSIVE ON TEMPERATURE MODE OF GEOTHERMAL CIRCULATION SYSTEM

2018 ◽  
pp. 44-50
Author(s):  
Yu. P. Morozov
Keyword(s):  
Heat Transfer ◽  
Operating Time ◽  
Fluid Motion ◽  
Coolant Temperature ◽  
Circulation System ◽  
Thermal Processes ◽  
Temperature Mode ◽  
Heat Influx ◽  
Stationary Heat Transfer

Based on the solution of the problem of non-stationary heat transfer during fluid motion in underground permeable layers, dependence was obtained to determine the operating time of the geothermal circulation system in the regime of constant and falling temperatures. It has been established that for a thickness of the layer H <4 m, the influence of heat influxes at = 0.99 and = 0.5 is practically the same, but for a thickness of the layer H> 5 m, the influence of heat inflows depends significantly on temperature. At a thickness of the permeable formation H> 20 m, the heat transfer at = 0.99 has virtually no effect on the thermal processes in the permeable formation, but at = 0.5 the heat influx, depending on the speed of movement, can be from 50 to 90%. Only at H> 50 m, the effect of heat influx significantly decreases and amounts, depending on the filtration rate, from 50 to 10%. The thermal effect of the rock mass with its thickness of more than 10 m, the distance between the discharge circuit and operation, as well as the speed of the coolant have almost no effect on the determination of the operating time of the GCS in constant temperature mode. During operation of the GCS at a dimensionless coolant temperature = 0.5, the velocity of the coolant is significant. With an increase in the speed of the coolant in two times, the error changes by 1.5 times.

Physical-Mathematical Modeling of Thermal Processes in Cold Systems

2009 ◽  
Vol 40 (2) ◽  
pp. 117-126
Author(s):  
E. A. Lesyuk
Keyword(s):  
Mathematical Modeling ◽  
Thermal Processes

Konsep Kapal Pengumpan Reguler untuk Mendukung Angkutan Laut Perintis di Wilayah Pulau-Pulau Terpencil

2019 ◽  
Vol 4 (1) ◽  
pp. 12
Author(s):  
Dany Hendrik Priatno ◽  
Samudro
Keyword(s):  
Simulation Design ◽  
Feeder Vessel

Keterbatasan sarana dan prasarana transportasi di wilayah pulau-pulau terpencil masih menjadi kendala dalam mengembangkan sektor transportasi di wilayah tersebut. Di sisi lain, wilayah ini diharapkan dapat menjadi faktor pemicu dalam peningkatan perekonomian, membuka keterisolasian, dan menjaga stabilitas dan keamanan wilayah. Pola penerapan jaringan transportasi angkutan laut dengan sistem subsidi (angkutan laut perintis) dari pemerintah sudah berjalan meski dengan berbagai kendala yang memerlukan pemikiran dan solusi tepat dalam mendukung program transportasi angkutan laut bersubsidi tersebut dalam hal efektifitas angkutan, efisiensi dan pemerataan dalam pemanfaatannya. Keterbatasan pelayanan pada rute operasional angkutan laut perintis dapat dijembatani dengan menerapkan konsep pengumpan (feeder) regular pada titik – titik singgah kapal perintis, sehingga dengan demikian rute eksisting angkutan laut perintis dapat tetap dioptimalkan, tanpa menambah jumlah titik singgah (yang berarti menambah time voyage), bahkan hal ini dapat mengurangi jumlah titik singgah kapal perintis laut. Simulasi penerapan konsep feeder pada jalur angkutan laut perintis dilakukan dan dilengkapi dengan kajian kebutuhan desain sarana kapal feeder perintis yang tepat untuk mendukung konsep sistem feeder tersebut.Keywords : feeders pioneer, operational simulation, design feeder vessel

Inter Layer Dielectric Defect Induced High Contact Resistance

2010 ◽  
Author(s):  
Re-Long Chiu ◽  
Jason Higgins ◽  
Toby Kinder ◽  
Juha Tyni ◽  
Sharon Ying ◽  
...  
Keyword(s):  
Contact Resistance ◽  
Failure Analysis ◽  
Failure Mode ◽  
Phosphorus Content ◽  
Moisture Absorption ◽  
Thermal Processes ◽  
Analysis Methods ◽  
Low Phosphorus

Abstract High contact resistance can be caused by moisture absorption in low phosphorus content BPTEOS. Moisture diffused through the TiN glue layer is absorbed by the BPTEOS during subsequent thermal processes resulting in increased contact resistance. This failure mode was studied by combining different failure analysis methods and was confirmed by duplication on experimental wafers.

Sign in / Sign up

Export Citation Format

Share Document