calculation of lv suorce

... detector efficiency based on theoretical calculations. Nowadays, the numerical calculation of efficiency of various types of gamma detectors has been a field of research. The Monte-Carlo modeling ... VNU Journal of Science, Mathematics - Physics 23 (2007) 99-104 99 Study on Monte-Carlo calculation of peak efficiencies of the superpure Hp Ge detector (Gmx) in ... 5.57 4. Conclusion The problem of photon self-absorption in gamma spectrometry of environmental samples has no simple solution because of the attenuation of photons depending on many various...

Ngày tải lên: 13/02/2014, 04:20

... 147 Calculation of Lindemann’s melting Temperature and Eutectic Point of bcc Binary Alloys Nguyen Van Hung * , Nguyen Cong Toan, Hoang Thi Khanh Giang Department of Physics, University of ... center of the bcc are localized in an elementary cell. Hence, the total number of atoms in an elementary cell is 2. Then if on average s is atomic number of type 1 and (2 - s) is atomic number of ... mean energy of the crystal consisting of N lattice cells is given by ( ) ∑ −+= ∑ = q qqqqq uMsusMN q 2 2 2 2 2 1 2 1 )2( ωωεE , (6) where, M 1 , M 2 are the masses of atoms of types 1 and...

Ngày tải lên: 14/03/2014, 13:20

... and phase of real vibration of atomic chain containing dopant atom have been derived. They contain Morse potential parameters characterizing vibration of each pair of atoms. Numerical calculations ... Trung Department of Physics, College of Science, VNU, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam Received 16 June 2008 Abstract. A new procedure for calculation and analysis of dispersion relation ... VNU Journal of Science, Mathematics - Physics 24 (2008) 223-230 223 Calculation of dispersion relation and real atomic vibration of fcc crystals containing dopant atom...

Ngày tải lên: 14/03/2014, 13:20

... contained in the expressions of equation of state [1]. Therefore, calculation of the Morse potential is very actually desired, especially in XAFS theory. The calculation of Morse potential has been ... the efficiency and reliability of the present procedure in computation of the VNU Journal of Science, Mathematics - Physics 24 (2008) 125-131 125 Calculation of Morse Potential for Diamond ... The purpose of this work is to develop a method for calculation of Morse potential parameters of Diamond, an interesting crystal structure. Analytical expressions for the parameters of this potential...

Ngày tải lên: 14/03/2014, 13:20

... simulations often require high calculation cost. The most intensive part of MD is calculation of Coulombic force among particles (i.e. atoms and ions). In naive direct- summation algorithm, cost of the ... performance of FMM on GRAPE. In this paper we describe our new formulation to speed up far field force calculation – a sig- nificant calculation part of FMM on GRAPE. Remaining parts of the paper ... evaluation of it takes rather big fraction of the overall calculation time [10]. If we can convert a set of potential values into a set of pseudoparticles at marginal calculation cost, force from those...

Ngày tải lên: 22/03/2014, 11:20

... forms of EOS. Molecular Dynamics Calculation of Critical Point of Nickel 11 In Eq. (1), D is the total dissociation energy, r ε is the equilibrium distance, and b is a constant, with values of 0.4205 ... axis of the calculation domain (39.66 nm at room temperature). It is seen that the fluctuation of density at state b is larger than those at the other two states, indicating the coexistence of gas ... are calculated from the statistical analysis of positions, velocities, and forces of the molecules at locations of interest. With very few assumptions of the material properties and the pro- cess,...

Ngày tải lên: 06/05/2014, 08:54

... viii PREFACE or steep wave fronts, thereby limiting the usefulness of the theoretical investigation, and makes the calculation of many im- portant phenomena, such as the determination of the danger zone of steep wave fronts, the conditions of circuit design limit- ing the danger ... of these transient phenomena were observed and experi- mentally investigated in the early clays of electrical engineering for instance, the building up of the voltage of direct-current generators from the remanent magnetism. Others, such a,s the investigation of the rapidity of the response of a compound generator or a booster to a change of load, have become of impor- tance with the stricter requirements now made on electric totems Iransient phenomena ... circuit. . 131 78. Capacity shunting a part of the continuous-current circuit. Derivation of equations. 133 79. Calculations of numerical example. 136 80. Discussions of the elimination of current pulsations by shunted capacity. 137 81. Example of elimination of pulsation from...

Ngày tải lên: 04/06/2014, 12:34

... Bayramov Journal of Inequalities and Applications 2011, 2011:113 http://www.journalofinequalitiesandapplications.com/content/2011/1/113 Page 7 of 9 RESEARCH Open Access On calculation of eigenvalues ... Bayramov: On calculation of eigenvalues and eigenfunctions of a Sturm-Liouville type problem with retarded argument which contains a spectral parameter in the boundary condition. Journal of Inequalities ... λ n )=O  1 n  . Şen and Bayramov Journal of Inequalities and Applications 2011, 2011:113 http://www.journalofinequalitiesandapplications.com/content/2011/1/113 Page 6 of 9 Proof. To prove this, it is enough...

Ngày tải lên: 20/06/2014, 22:20

... evaluation of the influence of jitter (as well of other levels of noise and their combinations) in the performance of the PDA and HNRSr would require extensive tests and is out of the scope of this ... implementation of (28)wasperformedby setting a sampling frequency of 22050 Hz, a fundamental frequency of 150 Hz (yielding 147 samples per period), and M = 300, to produce an approximate of 2 seconds of synthesized ... spite of using estimated values for the pulse amplitudes. Both facts can be explained by the presence, in any pulse of the signal, of the decaying tails of previous pulses. This summation of tails...

Ngày tải lên: 21/06/2014, 20:20

... involves the assessment of both memory occupation and time processing as the number of leads n varies. The computational complexity of Selvester score should also be calculated as a function of ... the group of rules in Selvester table (see Ta bl e 6). This step involves the knowledge of the maximum peaks associated with Q, R,andS,aswellasthedurationofQ- wave and R-wave. From Selvester table, ... n = 0 200 400 600 800 1000 Number of operations 10 20 30 40 50 Number of leads (n) Selvester Anderson-Wilkins Aldrich Aldrich score Selvester score Anderson-Wilkins score Figure 2: Theoretical computational complexity of (5a)-(5b),...

Ngày tải lên: 21/06/2014, 22:20

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 29/06/2014, 09:20

Ngày tải lên: 17/09/2013, 21:00

... 25km 2 in offshore region. The domain includes 2879 nodes with the coarse resolution of 5000m for offshore and the fine resolution of 50m for nearshore areas. Figure 1. a) Bathymetry of the ... avoid problem of filling in Day river mouth. Calculations show an agreement with recent other studies. Results also provide evidence for the importance of annual dredging of Day river mouth ... increasing trend of water level (red line). Magnitude of the increase is consistent with the increase projected in the sea level rise scenarios in section 4. 5.4. Calculation of sediment distribution...

Ngày tải lên: 10/03/2014, 18:20

... with these software parameters, a cost accountant delves into details on material, manufacturing and labor costs. He includes analyses of costs versus profitability in all areas of operation. ... words, it is a system of accounting, which provides the information about the ascertainment, and control of costs of products, or services. It measures the operating efficiency of the enterprise. ... research focuses on the cost accounting system of one of the biggest company in Vietnam, Ba Dinh Printing Company, which is under the control of Ministry of Public Security. As its name, the company...

Ngày tải lên: 13/03/2014, 14:20

... or EM2OH was dissolved in 0.7 mL of TFE Fig. 9. Stereoscopic view of possible dock- ing of rS-type open conformer of EM2 (ball and stick model) on the agonist binding site of the l-opioid receptor ... His297. The fitting of the overall conformation of EM2 to the spatial area of the l-opioid receptor pocket showed a high preference for the accommodation of the open conformer of EM2 over the folded ... positions of H atoms of amino and hydroxyl groups of EM2OH and water molecules were determined from a difference Fourier map, while those of the other H atoms were calculated on the basis of their...

Ngày tải lên: 30/03/2014, 20:20

Ngày tải lên: 23/06/2014, 01:20