scholarly journals DEVELOPMENT OF WOOD GRINDING 1. GRINDING MODEL

2020 ◽  
Vol 54 (9-10) ◽  
pp. 939-941
Author(s):  
BRUNO LÖNNBERG
Keyword(s):  
Theoretical Model ◽  
Energy Balance ◽  
Power Ratio ◽  
Specific Production ◽  
Set Up ◽  
Balance Set

The aim of this study was to develop and test a model expected to be useful in interpretation of stone grinding of wood. Since stone grinding has been in use for about two centuries, it is surprising that some grinding mechanisms still remain undiscovered. The application of an energy balance set-up for the wood and grindstone surfaces, valid for wood grinding under conditions presenting continuity, resulted in a useful model. The theoretical model developed suggests that the ratio of the compression and tension powers, called the power ratio, depends linearly on the specific production. The experimental grinding data tested in this context follow the theoretical model. Hence, it would be a valuable tool in further evaluation of grinding and groundwood data.

A Model for Calculating the Outlet Flue Gas Temperature of FGD Absorption Tower

2011 ◽  
Vol 130-134 ◽  
pp. 3812-3816
Author(s):  
Gang Xu ◽  
Yao Tian ◽  
Xing Yuan ◽  
Yong Ping Yang
Keyword(s):  
Theoretical Model ◽  
Energy Balance ◽  
Water Consumption ◽  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Gas Temperature ◽  
Significance Analysis

Theoretical model for calculating the outlet flue gas temperature of limestone-gypsum wet flue gas desulfurization (FGD) absorption tower is important for water consumption calculation. In this paper, the energy balance in the spray zone is analyzed and a model for calculating the outlet flue gas temperature of FGD absorption tower is proposed. An example computation of the outlet flue gas temperature of a typical 600MW class unit’s operation data is introduced, the result has verified the model. A further study of significance analysis has then been made to analyze and simplify the model.

Damage Detection Using Piezoelectrics Modal Analysis and PSD Technique

2000 ◽  
Author(s):  
Sauro Liberatore ◽  
Gregory P. Carman
Keyword(s):  
Theoretical Model ◽  
Damage Detection ◽  
State Space Model ◽  
Piezoelectric Sensor ◽  
Simply Supported Beam ◽  
Simply Supported ◽  
Power Spectral ◽  
Frequency Changes ◽  
Set Up ◽  
Aluminum Beam

Abstract A damage detection method has been implemented on a simply supported beam structure. The method is developed with both a theoretical model and experimental results. The simply supported beam contains one piezoelectric actuator and one piezoelectric sensor. The theoretical model was obtained from an energy formulation and a Rayleigh-Ritz approach. Matrices were composed in a State Space model to reproduce the input-output system between actuator and sensor. The damage was modeled with material properties variations. The experimental set up consisted of an aluminum beam with damage introduced by adding different weights in various locations. The dynamic changes produced were investigated and compared with theoretical prediction with reasonable agreement obtained. In order to quantify the size of damage, Power Spectral Density approach was used. To locate damage, frequency changes were used.

Inclusive leadership: new age leadership to foster organizational inclusion

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sunaina Chetan Kuknor ◽  
Shubhasheesh Bhattacharya
Keyword(s):  
Theoretical Model ◽  
Literature Review ◽  
Human Resources ◽  
Design Methodology ◽  
Human Resources Development ◽  
Inclusive Leadership ◽  
Content Type ◽  
Set Up ◽  
The Relationship ◽  
Practical Implications

Purpose This paper aims to investigate the relationship between inclusive leadership (IL) and organizational inclusion (OI) in literature and explores the contribution of IL and OI in human resources development (HRD). Design/methodology/approach The systematic literature review was undertaken from peer-reviewed journals. In total, 68 articles were critically analyzed to be included in the review highlighting the relationship between IL and OI. Findings The paper provides insights into leader behaviors that foster IL and how it differs from other styles of leadership. The paper also proposes a theoretical model to show the relationship between IL and OI. Practical implications The study will facilitate creating awareness in practitioners and academicians who think inclusion is mostly concerned with disabled learners, which is misleading. The paper will help the concerned stakeholders to formulate HRD practices to foster an inclusive culture at work. Originality/value The paper explores an area less researched and is among the few review papers investigating through the relationship between IL and OI and how they impact HRD practices in an organizational set-up.

scholarly journals WAVES OVERTOPPING A WIDE-CRESTED DIKE

2011 ◽  
Vol 1 (32) ◽  
pp. 7 ◽  
Author(s):  
Toon Verwaest ◽  
Philippe Vanpoucke ◽  
Marc Willems ◽  
Tom De Mulder
Keyword(s):  
Theoretical Model ◽  
Energy Balance ◽  
Kinetic Energy ◽  
Scale Model ◽  
Coastal Protection ◽  
Model Concept ◽  
Wave Overtopping ◽  
Model Research ◽  
Physical Scale ◽  
Semi Empirical

If a coastal dike has a crest width of more than say a few meters, then wave overtopping will be significantly reduced due to the crest width, because kinetic energy can be dissipated on the crest and water on the crest can flow back towards the seaside. In coastal towns built on dune belts often a wide-crested coastal dike was constructed as both coastal protection and sea promenade. However, quantifying the effect of such a wide crest on wave overtopping is not straightforward because no empirical overtopping formulas are given in literature for this kind of configuration. Therefore physical scale model research was carried out. Also a simplified theoretical model concept was used based on an energy balance formulation of a single overtopping wave. Combining the scale model measurements with the theoretical model, a semi-empirical formula was developed and calibrated.

scholarly journals Sensitivity of edge illumination X-ray phase-contrast imaging

2014 ◽  
Vol 372 (2010) ◽  
pp. 20130128 ◽  
Author(s):  
P. C. Diemoz ◽  
M. Endrizzi ◽  
A. Bravin ◽  
I. K. Robinson ◽  
A. Olivo
Keyword(s):  
Theoretical Model ◽  
Phase Contrast ◽  
Angular Resolution ◽  
Signal To Noise Ratio ◽  
Phase Contrast Imaging ◽  
High Angular Resolution ◽  
Contrast Imaging ◽  
Signal To Noise ◽  
X Ray ◽  
Set Up

Recently, we developed a theoretical model that can predict the signal-to-noise ratio for edge-like features in phase-contrast images. This model was then applied for the estimation of the sensitivity of three different X-ray phase-contrast techniques: propagation-based imaging, analyser-based imaging and grating interferometry. We show here how the same formalism can be used also in the case of the edge illumination (EI) technique, providing results that are consistent with those of a recently developed method for the estimation of noise in the retrieved refraction image. The new model is then applied to calculate, in the case of a given synchrotron radiation set-up, the optimum positions of the pre-sample aperture and detector edge to maximize the sensitivity. Finally, an example of the extremely high angular resolution achievable with the EI technique is presented.

scholarly journals Last minute panic in zero sum games

2019 ◽  
Vol 25 ◽  
pp. 25
Author(s):  
Stefan Ankirchner ◽  
Christophette Blanchet-Scalliet ◽  
Kai Kümmel
Keyword(s):  
Nash Equilibrium ◽  
Theoretical Model ◽  
Unique Solution ◽  
Numerical Experiments ◽  
Strong Impact ◽  
Isaacs Equation ◽  
Sports Teams ◽  
Zero Sum Games ◽  
Set Up ◽  
Zero Sum

We set up a game theoretical model to analyze the optimal attacking intensity of sports teams during a game. We suppose that two teams can dynamically choose among more or less offensive actions and that the scoring probability of each team depends on both teams’ actions. We assume a zero sum setting and characterize a Nash equilibrium in terms of the unique solution of an Isaacs equation. We present results from numerical experiments showing that a change in the score has a strong impact on strategies, but not necessarily on scoring intensities. We give examples where strategies strongly depend on the score, the scoring intensities not at all.

Theoretical Model and Application of Nodal Analysis in Layered Water Flooding Regime - Take Bi-Layer Reservoir as an Example

2014 ◽  
Vol 522-524 ◽  
pp. 1552-1557
Author(s):  
Lei Wang ◽  
Guo Wei Qin ◽  
Rui Wang ◽  
Wen Bo Xu ◽  
Rui Gao ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Theoretical Model ◽  
Optimum Condition ◽  
Water Flooding ◽  
Horizontal Flow ◽  
Vertical Flow ◽  
Nodal Analysis ◽  
Flooding Regime ◽  
Set Up ◽  
Inflow Performance

A bi-layer mathematical model of nodal analysis under the condition of separate layer injection-production has been set up on the study of inflow performance relationship between injectors and producers, horizontal flow, vertical flow, choke flow etc., according to nodal analysis principle. In theory, this method can be used to determine reasonable working system of injectors and producers, and can be optimized the allocation and injection allocation, and can also be made water flooding regime in its optimum condition.

A Computer Method for Thermal Power Cycle Calculation

1991 ◽  
Vol 113 (2) ◽  
pp. 184-189 ◽  
Author(s):  
E. Perz
Keyword(s):  
Energy Balance ◽  
Input Data ◽  
Thermal Power ◽  
Computer Method ◽  
Algebraic Equations ◽  
Balance Equations ◽  
Power Cycle ◽  
Convergence Method ◽  
Set Up ◽  
And Storage

This paper describes a highly flexible computer method for thermodynamic power cycle calculations (PCC). With this method the user can model any cycle scheme by selecting components from a library and connecting them in an appropriate way. The flexibility is not restricted by any predefined cycle schemes. A power cycle is mathematically represented by a system of algebraic equations. The structure of mathematical cycle models as well as different approaches to set up and solve the resulting equations with computer programs are discussed in the first section. The second section describes the developed method. The mass and energy balance equations are set up and solved with a semiparallel algorithm. As input only the cycle’s topology and component parameters must be entered. Information about the calculation sequence and the convergence method can be omitted completely. The example of two simple steam cycles demonstrates the applied technique. The method requires only a few, if any, iterations. Calculation time and storage requirements can be kept low enough to calculate even very complex cycles on personal computers. At the end of the paper input data and results for a complex cycle scheme as it may occur in reality are given to demonstrate the performance finally.

scholarly journals A simple model to study wave-surge interaction

MAUSAM ◽  
2021 ◽  
Vol 48 (2) ◽  
pp. 323-328
Author(s):  
P.S. MUKHOPADHYAY ◽  
G. K. MANDAL ◽  
G. K. SEN ◽  
D. K. SINHA
Keyword(s):  
Energy Balance ◽  
Balance Equation ◽  
Wind Waves ◽  
Energy Balance Equation ◽  
Integration Scheme ◽  
Hydrodynamic Equations ◽  
Energy Contribution ◽  
Shallow Basin ◽  
Grid Points ◽  
Set Up

ABSTRACT. In this paper we have tried to set up a mathematical model that will show the contribution of wind-induced surface waves of the ocean, on surges in shallow basin of Bay of Bengal. For this, the energy balance equation, excluding non-linear forcing term, is considered and solved by Lax-Wendroff integration scheme. Wind is specified over all the grid points following Cardone' s formulation. The hydrodynamic equations in linearised form as used by Jelesnianski have been considered and using Shuman's algorithm, those equations have been solved. In the process of solving these equations, the output of the energy balance equation is included as wave set up term to incorporate energy contribution of wind waves to surges. The estimated surge height is compared with and without considering wave contribution.      

scholarly journals Characteristics of Spiral Patterns Formed by Coaxial Interference between Two Vortex Beams with Different Radii of Wavefront Curvatures

Photonics ◽  
2021 ◽  
Vol 8 (9) ◽  
pp. 393
Author(s):  
Jingbo Ma ◽  
Peng Li ◽  
Yuzong Gu
Keyword(s):  
Theoretical Model ◽  
Phase Difference ◽  
Spherical Wave ◽  
Spiral Pattern ◽  
Absolute Value ◽  
The Core ◽  
Vortex Beams ◽  
The Difference ◽  
Set Up ◽  
Topological Charges

Spiral pattern is formed for coaxial interference between two vortex beams with different radii of wavefront curvatures and different topological charges (TCs). A theoretical model considering various parameters (such as phase difference, radius of wavefront curvature, and TCs) is established to predict all kinds of interference patterns. An improved Mach-Zehnder interferometer is set up in an experiment to generate different kinds of spiral patterns and verify the theoretical model. The number of spiral lobes is determined by the absolute value of TCs’ difference between two vortex beams, and the twist direction relates to the sign of TCs’ difference and the difference of reciprocals for the radii of wavefront curvature, clockwise for the same sign, and counterclockwise for the opposite signs. The twist direction of the spiral pattern reverses and the lobes direction near the core of the pattern changes obviously when the spherical wave changes from convergence to divergence.

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