Within the life sciences switching mechanisms are pervasive at all levels, from molecules to cells and tissues. Their operation can be a key determinant of health or disease. Whilst the existence and importance of swi...
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Within the life sciences switching mechanisms are pervasive at all levels, from molecules to cells and tissues. Their operation can be a key determinant of health or disease. Whilst the existence and importance of switches is widely acknowledged within the biological literature, many life scientists do not deal explicitly with the switching behaviour. Frequently, steady-state behaviour before and after switching is the primary focus. Here methods for analysis of switched systems from control engineering are applied to the modelling and analysis of a riboswitch. The model has been developed by studying the dynamics of the vitamin B 12 riboswitch. The simulation results have been validated using in vivo experiments by checking the bacterial growth when using Escherichia coli and Salmonella enterica where the action of the vitamin B 12 riboswitch is known to be a determinant of system behaviour. The paper first describes a simple model for the B 12 -riboswitch regulatory network in E. coli and applies the same analysis when changing the strain to S. enterica. Validation of the simulation results has been undertaken by linking the dynamics of the riboswitch to bacterial growth.
This paper presents a mathematical model of the dynamic behaviour of a passive heave compensation system. The main purpose is to develop a model that enables cost-efficient prototyping and testing of the control syste...
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This paper presents a mathematical model of the dynamic behaviour of a passive heave compensation system. The main purpose is to develop a model that enables cost-efficient prototyping and testing of the control system in an active heave compensator. The physics are described by first principles, and result in 21 ordinary differential equations. Temperature calculations are included as an option during simulation in order to investigate its effect on the results. Similarly is a non-ideal gas law (Redlich-Kwong equation) implemented and compared to the ideal gas law. Verification against field data shows that the model is in good accordance with real-life drilling operations. It is further shown that simulation with ideal gas law only gives small deterioration of the results, while neglecting temperature variations has a bigger impact on the dynamics.
The paper reports findings on mathematicalmodelling of ingots of different geometry. It is established that V-shaped cracks concentrated in the ingot bottom are gradually removed through upset, while arch-shaped crac...
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The paper reports findings on mathematicalmodelling of ingots of different geometry. It is established that V-shaped cracks concentrated in the ingot bottom are gradually removed through upset, while arch-shaped cracks located around the sedimentation cone top open up. A computer simulation made it possible to calculate efficient deformations in the workpiece axial zone. An alteration of the ingot geometry leads to an increase in efficient deformation and, consequently, a better treatment of axial areas and elimination of the axial defects of the ingot metal.
human Silhouette Extraction is one of the vital task in human abnormality gait detection. Hence in this study, extraction of human gait silhouette using Haar Cascade classifier is developed. This is done by detecting ...
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ISBN:
(纸本)9781538627358
human Silhouette Extraction is one of the vital task in human abnormality gait detection. Hence in this study, extraction of human gait silhouette using Haar Cascade classifier is developed. This is done by detecting the region of interests (ROI) and by cropping the selected areas followed by background subtraction to eliminate unwanted background and further convert the images to silhouettes form based on human gait sequences acquired. Next, human abnormality gait detection is conducted based on front view markerless model. Classification results attained showed that the developed Haar cascade classifier is indeed suitable and robust in extracting front view gait features for abnormality gait detection with detection time of KNN surpass the SVM classifier.
In recent years, there has been a move from monoventricular or biventricular models of the heart, to more complex models that incorporate the electromechanical function in all 4 chambers. However, the biophysical foun...
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In recent years, there has been a move from monoventricular or biventricular models of the heart, to more complex models that incorporate the electromechanical function in all 4 chambers. However, the biophysical foundation is still underdeveloped, with most work in atrial cellular models having focused on electrophysiological properties. Here, we present a biophysical model of human atrial contraction at body temperature and use it to study the effects of atrial contraction on whole organ function and a study of the effects of remodelling due to atrial fibrillation on atrial and ventricular function.
In this paper we analyse the kinematics and dynamics of the human upper limb to determine the position and the orientation of the shoulder and elbow joints in accordance with the forward and reverse kinematic mathemat...
In this paper we analyse the kinematics and dynamics of the human upper limb to determine the position and the orientation of the shoulder and elbow joints in accordance with the forward and reverse kinematic mathematical model and the Jacobian forward and reverse kinematic mathematical model. We also developed a 3D human arm model in a computer aided-design software based on the result determined from mathematical models and in accordance with five degrees of freedom offered by anatomical position of human arm revolute joints associated to the shoulder and elbow. We simulated the entire dynamics of human arm in Matlab-Simulink in order to control the movement according to different predefined trajectories.
The article represents the results of mathematicalmodelling of behaviour of the granular medium on an oscillating rough surface. Granular medium under the action of vibration is considered as a non-Newtonian (dilatan...
The article represents the results of mathematicalmodelling of behaviour of the granular medium on an oscillating rough surface. Granular medium under the action of vibration is considered as a non-Newtonian (dilatant) fluid. The system of differential equations of continuum mechanics is solved using the modified large particles method. An algorithm for solving the problem for granular media with different properties under external influences is proposed.
Electricity generation from conventional fuel fired power plant is in threat due to rising demand of fossil fuel, inefficient power conversion technology, CO 2 emission to environment. Also Energy security, global en...
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Electricity generation from conventional fuel fired power plant is in threat due to rising demand of fossil fuel, inefficient power conversion technology, CO 2 emission to environment. Also Energy security, global environment concern, fastest development of technology are driving countries towards clean fuel, alternative technology for efficient and reliable power generation. An externally fired micro gas turbines (EFmGT) are novel technology that opens a new possibility to use alternative fuel like renewable energy for small and medium scale power and heat (CHP) generation in distributed system with micro gas turbine technology. In literature simple model of externally fired micro gas turbine to study the dynamic behaviour is absent. In this study the aim is to develop a simple model of externally fired micro gas turbine based on poly generation system in Matlab/Simulink environment and derived model used to analyse the effect of operational parameters and forecast performance of real EFmGT configurations.
In this paper the methodological basis and model of cognitive user interface are *** cognitive user interface is defined as the interface that implements part of human cognitive functions and provides a quick and corr...
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In this paper the methodological basis and model of cognitive user interface are *** cognitive user interface is defined as the interface that implements part of human cognitive functions and provides a quick and correct formation of the user concepts based on the generated *** main stages of the geoinformation perception process are listed and example of using the cognitive interface for the visualization of geodata is given.
Analytical modeling of the flow of manufacturing process of the cement is difficult because of their complexity and has not resulted in sufficiently precise mathematical models. In this paper, based on a statistical m...
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Analytical modeling of the flow of manufacturing process of the cement is difficult because of their complexity and has not resulted in sufficiently precise mathematical models. In this paper, based on a statistical model of the process and using the knowledge of human experts, was designed a fuzzy system for automatic control of clinkering process.
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