Theoretical Prediction of Muscle Forces on the Mandible During Bite

1990 ◽  
Vol 112 (4) ◽  
pp. 432-436 ◽  
Author(s):  
Q. S. Kang ◽  
D. P. Updike ◽  
Eric P. Salathe
Keyword(s):  
Mathematical Model ◽  
Theoretical Prediction ◽  
Maximum Stress ◽  
Optimization Technique ◽  
Bite Force ◽  
Experimental Results ◽  
Muscle Forces ◽  
Capsular Ligament ◽  
Predicted Values

We present a mathematical model to determine the contribution of each muscle acting on the mandible in the development of a given bite force. We give special attention to the representation of the widely radiated temporalis and account for the attachment of the external pterygoid to the capsular ligament. An optimization technique based on minimizing the maximum stress occurring in the muscles is used to resolve the statically indeterminant nature of the problem formulated. The theoretically predicted values of the muscle forces are compared to experimental results taken from the literature.

scholarly journals Hybrid thermoelectric ejector - refrigeration system

2017 ◽  
Author(s):  
◽  
Baffoe Obeng
Keyword(s):  
Mathematical Model ◽  
High Temperature ◽  
Theoretical Prediction ◽  
Nozzle Exit ◽  
Cooling System ◽  
Experimental Results ◽  
Working Fluid ◽  
Thermoelectric Cooler ◽  
Refrigeration System ◽  
Waste Energy

A mathematical model is developed to predict the refrigeration performance of an ejector powered by waste energy from a thermoelectric cooler. The model is based on constant pressure mixing process and considers the effect of frictional loss, viscous effect and shock wave phenomenon. Using this model, effects of nozzle exit position, temperatures of low and high temperature evaporators, area ratios, and working fluid on the system performance can be predicted. The components of the ejector were fabricated and an experiment was set up using water as working fluid. At steady state, effects such as operational conditions, nozzle exit position and critical condensing pressure on performance of the system were studied. The experimental results were compared with investigations conducted by other researchers and also with theoretical prediction. Based on the experimental results and theoretical prediction, the performance of a miniature thermoelectric ejector cooler can be determined. While a pump is needed for a conventional ejector cooling system, the investigated system is to utilize the capillary force generated by thermal energy to produce the pumping capability to pump the working fluid from the condenser to both low-temperature evaporator and high-temperature evaporator. A mathematical model is developed to predict the capillary flow and ensure the circulation through the entire system from the condenser, through the lowtemperature evaporator to the high-temperature evaporator. The model can consider the effects of wick structure, vapor pressure, liquid pressure, temperature and flow rate. Using this model, the hybrid ejector system is designed and fabricated. The experimental system to test the prototype is developed and an experiment is conducted subsequently. Using the waste energy generated from the hot side of the thermoelectric cooler, the coefficient of performance (COP) of the hybrid system, i.e., thermoelectric cooler integrated with ejector refrigeration system, can be highly increased. The investigation will result in highly efficient cooling system for electronic cooling.

Analysis of Surface Properties of Diamond-Like Carbon Films by a Sputtering Deposition

2013 ◽  
Vol 662 ◽  
pp. 505-510 ◽  
Author(s):  
Jium Fang ◽  
Maw Tyan Sheen ◽  
Ming Der Jean
Keyword(s):  
Photoelectron Spectroscopy ◽  
Fuzzy Inference ◽  
Carbon Films ◽  
Experimental Results ◽  
Wear Volume ◽  
Diamond Like Carbon ◽  
Sputtering Deposition ◽  
Tribological Behaviors ◽  
Predicted Values ◽  
Inference Systems

A new approach with adaptive network-based fuzzy inference systems (ANFIS) based on experimental designs was used to model and characterize the tribological behaviors of diamond-like carbon (DLC) films deposited by a magnetron sputtering system. An orthogonal array experiment was introduced and the effects of deposited parameters on the films were systematically explored. The films were analyzed by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). In this study, a group of highly developed hillock-like textures appeared and a lower wear volume loss became visible in the DLC films. Furthermore, the predicted values and experimental results, in which the ANFIS effectively predicts the tribological behaviors of the DLC films, are similar. It was experimentally confirmed the ANFIS predictions agreed with the experiments. Therefore, the experimental results demonstrate the tribological properties on DLC multilayer films are accurately predicted by ANFIS, thereby justifying the reliability and feasibility of the approach.

Friction and Tribological Considerations for Nanometer Range Machining

2001 ◽  
Author(s):  
Som Chattopadhyay
Keyword(s):  
Mathematical Model ◽  
High Precision ◽  
Local Deformation ◽  
Experimental Results ◽  
Precision Machining ◽  
Complex Motion ◽  
Positioning Accuracy ◽  
Nanometer Range ◽  
Motion Characteristic ◽  
Low Speeds

Abstract Positioning accuracy within the range of nanometers is required for high precision machining applications. The implementation of such a range is difficult through the slides because of (a) irregular nature of friction at the slider-guideway interface, and (b) complex motion characteristic at very low speeds. The complexity arises due to the local deformation at the interface prior to breakaway, which is known as microdynamics. In this work prior experimental results exhibiting microdynamics have been appraised, and mathematical model developed to understand this behavior.

Design and Experimental Analysis of Novel Refractometer Based on Photoelectric Sensor Technology

2011 ◽  
Vol 383-390 ◽  
pp. 5211-5215
Author(s):  
Yin Lin Li ◽  
Zhong Hua Huang ◽  
Kai Bo Hu
Keyword(s):  
Mathematical Model ◽  
Experimental Analysis ◽  
Differential Method ◽  
Theoretical Solution ◽  
Experimental Results ◽  
Sensor Technology ◽  
Photoelectric Sensor ◽  
Better Than

A novel refractometer based on photoelectric sensor technology and differential method is proposed. Sensing principle and mathematical model are introduced; structure and key parameters of sensing probe are designed through detail calculation. Theoretical solution shows resolution reaches order of 10-5. Preliminary experiments verify the feasibility of the design, experimental results show stability error better than ±1.02×10-4, error caused by temperature is 6.65×10-6/°C.

An Improved Trace Method for Moving Target under Occlusion

2014 ◽  
Vol 672-674 ◽  
pp. 1931-1934
Author(s):  
Yu Bing Dong ◽  
Guang Liang Cheng ◽  
Ming Jing Li
Keyword(s):  
Mathematical Model ◽  
Target Tracking ◽  
Difficult Problem ◽  
Block Matching ◽  
Experimental Results ◽  
Polar Coordinates ◽  
Moving Target ◽  
Trajectory Prediction ◽  
Tracking Method

Occlusion is a difficult problem to be solved in the process of target tracking. In order to solve the problem of occlusion, a new tracking method combined with trajectory prediction and multi-block matching is presented and studied,and a mathematical model of trajectory prediction of moving target is established in polar coordinates and verified through some experiments. The experimental results show that the new tracking method can be better to trace and forecast the moving target under occlusion.

scholarly journals Modelling simultaneous removal of trichlorfon and glucose in a hybrid bioreactor containing magnetically immobilized biomass

1998 ◽  
Vol 38 (4-5) ◽  
pp. 179-186 ◽  
Author(s):  
Guang Hao Chen ◽  
Hiroaki Ozaki ◽  
Yutaka Terashima
Keyword(s):  
Mathematical Model ◽  
Carbon Source ◽  
Experimental Results ◽  
Simultaneous Removal ◽  
Industrial Wastewaters ◽  
Suspended Biomass ◽  
Immobilized Biomass

This paper focuses on a simultaneous removal of trichlorfon and glucose that was added as carbon source for degradation requirement of trichlorfon. A hybrid bioreactor, having both suspended and magnetically immobilized biomass, was used for investigating this removal of both substances. To evaluate the respective roles of these two types of biomass, a mathematical model was developed and also verified well with experimental results. It has been found that the suspended biomass plays a key role in removing both substances in the system. This is due to complete coexistence of both trichlorfon-degrading and glucose-removing bacteria completely in each type of the biomass. Such a system would be applicable to the treatment of complex industrial wastewaters that contain easily biodegradable organics as well as refractory pollutants.

scholarly journals Trajectory planning method of mobile piezorobot

2009 ◽  
Vol 50 ◽  
Author(s):  
Ramutis Bansevičius ◽  
Asta Drukteinienė ◽  
Genadijus Kulvietis
Keyword(s):  
Mathematical Model ◽  
Mobile Robots ◽  
Trajectory Planning ◽  
Simultaneous Equations ◽  
Planning Method ◽  
Experimental Results

This paper presents analysis of trajectory planningmethods for mobile robots and new trajectory planning method research for mobile piezorobots. Here are deduced motional simultaneous equations for this kind of robots that describe point-to-pointmotion by given function. Preliminary experimental results prove the feasibility of proposed mathematical model.

Feeding Mathematical Modeling of Superalloy Vacuum-Electromagnetic Casting and its Application

2012 ◽  
Vol 629 ◽  
pp. 171-175
Author(s):  
Wen Zhong Jin ◽  
Su Fang Li ◽  
Wei Zhang
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
New Technology ◽  
Experimental Results ◽  
Electromagnetic Stirring ◽  
Shrinkage Cavity ◽  
Vacuum Casting ◽  
Electromagnetic Casting ◽  
Wide Range

The new technology of superalloy vacuum-electromagnetic casting was developed and the feeding mathematical model melt in vacuum-electromagnetic casting was established. The availability of mathematical model was approved by the experiments of the IN100 superalloy. The experimental results indicate that the feeding capacity of melt in vacuum casting can be greatly increased by imposing the 50Hz, 60A rotating electromagnetic stirring, which can decrease the central shrinkage cavity in superalloy ingots, so the quality of the superalloy ingots can be wide-range improved.

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