Different calculation models

MonteCarlo modeling allows calculating the detector efficiency in gamma spectrometry of environmental samples with taking into consideration both the photon selfabsorption in sample itself and absorption in all other materials between the sample and the detector’s active part. In this paper, the peak efficiencies of the Hp Ge detector (GMX) for gammas at various energies (emitted isotropically from the standard disk source and volumetric source  environmental sample, in which the different radionuclides are present) ...
6p tuanlocmuido 19122012 33 4 Download

This paper shows how to formally characterize language learning in a finite parameter space as a Markov structure, hnportant new language learning results follow directly: explicitly calculated sample complexity learning times under different input distribution assumptions (including CHILDES database language input) and learning regimes. We also briefly describe a new way to formally model (rapid) diachronic syntax change.
10p bunmoc_1 20042013 29 2 Download

(BQ) The modelling of ECM and EDM processes requires not one but several models to simulate the different phenomena that occur during machining. This paper reviews the models that have been developed to simulate each of these phenomena, e.g. potential models to calculate the current density distribution in ECM, thermal models for the plasma arc in EDM, moving boundary models to simulate the anodic dissolution in ECM and probabilistic models to determine the discharge location in EDM.
23p xuanphuongdhts 27032017 11 2 Download

(BQ)In this paper a new contribution to the simulation and modelling of the EDM process is presented. Temperature fields within the workpiece generated by the superposition of multiple discharges, as it happens during an actual EDM operation, are numerically calculated using a finite difference schema. The characteristics of the discharge for a given operation, namely energy transferred onto the workpiece, diameter of the discharge channel and material removal efficiency can be estimated using inverse identification from the results of the numerical model.
10p xuanphuongdhts 27032017 20 1 Download

The paper establishes and assesses the performance of a numerical relay SEL387 model concerning the protection of the 115/24kV transformer at Lang Co Substation by Matlab/Simulink. The paper also calculates the setting value of two actual slope characteristics (O87P = 0.3, U87P = 10, SLP1 = 25%, SLP2 = 50% and IRS1 = 3).
5p vidanh95 12122018 6 1 Download

The paper is dedicated to researching a numerical model for dambreak simulation, which is verified through a comparison between calculated results and observed data of two reference tests. The numerical model is applied to simulate the flooding wave for the Malpasset dambreak event, which occurred in southern France in 1959.
8p thihuynh3006 16032018 9 0 Download

The solubility of organic compounds in water was related to the environmental behaviors. In this work, the solubility values of 27 organic compounds were calculated by using the different molecular descriptors. The quantitative structuresolubility relationships (QSSRs) were constructed by incorporating the multivariable technique and the genetic algorithm. The important molecular descriptors such as logP, SsCH3_acnt, ABSQ, nelem, nrings, SHBa, Gmax, Gmin, Xvp6, and Xvpc4 were selected to construct the linear models QSSRs with the genetic algorithm.
8p cumeo3000 01082018 7 0 Download

In the paper, the authors present the results of the project concerning the input data, wave models and the calculated wave parameters with different returning periods for 5 sectors along the coastal line from Quang Ninh to Quang Nam. The obtained results afford the promising of using in the sea dyke design and upgrading.
9p thienthanquydu 21102018 9 0 Download

Integral model is simple in utilization, low in CPU time calculation, suitable for a lot of practical applications of turbulent diffusion jet. . However the assessment of accuracy of the model should be carried out by experimental data and by results of available multidirectional codes. The present paper shows the comparison of velocity profiles given by the integral model and the CFD FLUENT 6.0 Code. The difference in results given by the two models is lower than 10% when Reynolds number at the exit nozzle below 5000.
8p nguyenthuy1207 25102018 25 0 Download

This paper compares the DC optimal power flow (DCOPF) model and AC optimal power flow (ACOPF) that are used to calculate LMP in the wholesale electricity market. The study takes into account the pricesensitive loads and active power reserves. DCOPF model has 2 forms: DCOPF without losses and iterative DCOPF with losses.
6p trangcham1896 10122018 9 0 Download

To examine the effects of different geometries and mass specifications of a tractor operating across irregular sloping grounds on the lateral stability of this machine, a dynamic model was developed. In the proposed model, overturn and skid instabilities were studied.
9p vimb123 11012019 1 0 Download

This paper examines the difference in the value of the nuclear fuel cycle cost calculated by the deterministic and probabilistic methods on the basis of an equilibrium model. Calculating using the deterministic method, the direct disposal cost and PyroSFR (sodiumcooled fast reactor) nuclear fuel cycle cost, including the reactor cost, were found to be 66.41 mills/kWh and 77.82 mills/kWh, respectively (1 mill ¼ one thousand of a dollar, i.e., 103 $).
9p minhxaminhyeu5 30062019 0 0 Download

In this paper, three types of operational and industrial absorbers used at research reactors, including AgInCd alloy, B4C, and Hf are selected for sensitivity analyses. Their integral effects on the main neutronic core parameters important to safety issues are investigated. These parameters are core excess reactivity, shutdown margin, total reactivity worth of control rods, thermal neutron flux, power density distribution, and Power Peaking Factor (PPF). The IAEA 10 MW benchmark core is selected as the case study to verify calculations.
8p minhxaminhyeu5 30062019 0 0 Download

The reflection and transmission coefficients (S11 and S21) of planar material samples are determined using the proposed model. The complex permittivity and complex permeability are calculated from the values of S11 and S21. The proposed model is tested with different materials in the frequency range of 8.0 – 12.0 GHz. The results show that the more dielectric loss tangent, the more accuracy of complex permittivity. However, the complex permeability is slightly effected by the magnetic loss tangent.
9p thithizone 16072019 2 0 Download

When damage is identified with an index, it is difficult exactly match the index with the repair of damage. Therefore, the method is considered difficult to apply them to check the seismic risk based on definition of the changes in the process of damage and other details due to differences in design. To reach this goal, it is first necessary to calculate the design solution reflects the damage and the collapse of a structure under a uniform standard values for different seismic forces....
358p lulanphuong 24032012 47 7 Download

LYAPUNOV FUNCTIONALS CONSTRUCTION FOR STOCHASTIC DIFFERENCE SECONDKIND VOLTERRA EQUATIONS WITH CONTINUOUS TIME LEONID SHAIKHET Received 4 August 2003 The general method of Lyapunov functionals construction which was developed during the last decade for stability investigation of stochastic diﬀerential equations with aftereffect and stochastic diﬀerence equations is considered.
25p sting12 10032012 25 5 Download

We employ three different measures of performance: return on equity (ROE) which is defined as earnings before interest and tax (EBIT) divided by book value of shareholders‟ equity; return on sales (ROS), calculated as EBIT divided by total turnover; and Tobin‟s Q. 3 The latter indicator is calculated as the ratio of the firm‟s market capitalization to book value of equity. 4 We analyse the effect of IED using two definitions of variable IEit. First, we employ a dummy variable which takes the value of 1 if at least one nonexecutive director is also...
42p thamgiacongdong 02052013 31 3 Download

The topic of the paper is the problem how to define case relations by semantic predicates. A general principle is outlined, which renders it possible to "calculate" case relations for a given representation of a (verb)sememe by means of expressions. This principle is based on an assignment of case relations to primitive predicates and modification rules for nested expressions.
4p buncha_1 08052013 28 3 Download

This text is written to all chemical engineering students who are participating in courses about membrane processes and membrane technology. You are supposed to have the basic skills in mathematics and chemistry in general. Thus, this text is for students who have completed the basic engineering introduction courses. This text gives an introduction to principles behind pressure driven membrane processes. Relevant theory and models will be presented together with terms widely used in the world of membrane technology. ...
22p tuanloc_do 04122012 30 2 Download

A large number of proteins, found experimentally to have different optimum pH of maximal stability, were studied to reveal the basic principles of their preferenence for a particular pH. The pHdependent free energy of folding was modeled numerically as a function of pH as well as the net charge of the protein. The optimum pH was determined in the numerical calculations as the pH of the minimum free energy of folding. The experimental data for the pH of maximal stability (experimental optimum pH) was reproducible (rmsd¼0.73)....
13p dell39 03042013 23 2 Download