scholarly journals Electromagnetic calorimeter of the trigger system for the COMET experiment.

2019 ◽  
Vol 55 (1) ◽  
pp. 97-109
Author(s):  
D. V. Shoukavy ◽  
D. N. Grigoriev ◽  
L. B. Epshteyn ◽  
Yu. V. Yudin
Keyword(s):  
Monte Carlo Simulation ◽  
Electron Beam ◽  
Real Time ◽  
Electromagnetic Calorimeter ◽  
Trigger System ◽  
Signal Processing Algorithm ◽  
Simulation Results ◽  
Background Events ◽  
Better Than

In this paper, on the basis of the Monte-Carlo simulation results a signal processing algorithm for determination of the energy deposited in real time by incident particles has been developed and implemented in the created electronics prototype of the trigger system for an electromagnetic calorimeter of the COMET experiment. The energy thresholds for trigger cells are determined which make it possible to select signal events – an electron with a momentum of 105 MeV/c, and significantly reduce a rate of background events. The electronics prototype of the trigger system has been verified by testbench measurements and electron beam experiments. The obtained results satisfy the key requirement of the calorimeter – the energy resolution in real time is better than 5 % for the signal electron energy.

scholarly journals DIGITAL HEARING AID SIGNAL PROCESSING SYSTEM USING ANDROID PHONE

2019 ◽  
pp. 177-181
Author(s):  
YEH-HUANN GOH ◽  
YOON-KET LEE ◽  
MUM-WAI YIP ◽  
KOK-SENG EU ◽  
YANN LING GOH ◽  
...  
Keyword(s):  
Signal Processing ◽  
Hearing Loss ◽  
Frequency Response ◽  
Real Time ◽  
Hearing Aid ◽  
Processing Algorithm ◽  
Signal Processing Algorithm ◽  
Digital Hearing Aid ◽  
Simulation Results ◽  
Digital Algorithm

Objective: The objective of this research is to propose an Android-based digital hearing aid signal processing algorithm with following key features:(1) Regenerated audio match the patient-specific pattern of hearing loss, (2) noise reduction, and (3) provide flexibility to the users.Methods: The proposed signal processing algorithm is designed based on the specific hearing loss of the hearing disorder patient using inverse Fouriertransform; besides, noise reduction feature is included in the digital algorithm design as well. Proposed digital algorithm has been implemented intoan Android-based smartphone and its performance has been tested under real-time condition.Results: Simulation results show that the frequency response of the proposed digital hearing aid signal processing algorithm is in agreement withthe initial theoretical design that was carried out based on the hearing impaired patient’s audiogram. The proposed algorithm has been implementedin the Android-based smartphone and tested in real time. Results show that most of the patients are satisfied with the regenerated audio quality.According to patient’s comments, the regenerated audio is clear and the users are allowed to control the volume level. Besides, no obvious hearinglatency can be detected.Conclusion: Audio signals generated by the proposed digital signal processing algorithm show similar audio signal frequency response in boththeoretical design and MATLAB simulation results. The only difference between the design and simulation results is the amplification levels. Theproposed algorithm provides flexibility to the users by allowing them to choose the desired amplification level. In real-time testing, the proposedAndroid-based digital hearing aid is able to reduce noise level from the surrounding and the output processed speech match the patient-specifichearing loss.

scholarly journals Resource allocation procedures for unknown sales response functions with additive disturbances

2021 ◽  
Author(s):  
Daniel Gahler ◽  
Harald Hruschka
Keyword(s):  
Monte Carlo Simulation ◽  
Planning Horizon ◽  
Response Functions ◽  
Econometric Methods ◽  
Rules Of Thumb ◽  
Random Disturbances ◽  
Simulation Results ◽  
Sales Response ◽  
Exploration Exploitation ◽  
Better Than

AbstractWe develop a modified exploration–exploitation algorithm which allocates a fixed resource (e.g., a fixed budget) to several units with the objective to attain maximum sales. This algorithm does not require knowledge of the form and the parameters of sales response functions and is able to cope with additive random disturbances. Note that additive random disturbances, as a rule, are a component of sales response functions estimated by econometric methods. We compare the developed algorithm to three rules of thumb which in practice are often used to solve this allocation problem. The comparison is based on a Monte Carlo simulation for 384 experimental constellations, which are obtained from four function types, four procedures (including our algorithm), similar/varied elasticities, similar/varied saturations, high/low budgets, and three disturbance levels. A statistical analysis of the simulation results shows that across a multi-period planning horizon the algorithm performs better than the rules of thumb considered with respect to two sales-related criteria.

scholarly journals MC simulation results for projective geometry version of MPD ECAL at NICA collider

2019 ◽  
Vol 204 ◽  
pp. 07015 ◽  
Author(s):  
B. Dabrowska ◽  
V.V. Kulikov ◽  
M.A. Martemianov ◽  
M.A. Matsyuk ◽  
I.A. Tyapkin
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Projective Geometry ◽  
Simulation Software ◽  
Electromagnetic Calorimeter ◽  
Simulation Results ◽  
Mc Simulation ◽  
Nica Collider

The report describes the Monte-Carlo simulation software developed for the projective geometry version of the electromagnetic calorimeter of the MPD detector. The results of software tests and some characteristics of the calorimeter are presented.

A new method for QRS detection in ECG signals using QRS-preserving filtering techniques

2018 ◽  
Vol 63 (2) ◽  
pp. 207-217 ◽  
Author(s):  
Tanushree Sharma ◽  
Kamalesh K. Sharma
Keyword(s):  
Real Time ◽  
Wavelet Transforms ◽  
State Of The Art ◽  
Qrs Detection ◽  
Detection Techniques ◽  
Ecg Signals ◽  
Mode Decomposition ◽  
Improved Performance ◽  
Better Than

AbstractDetection of QRS complexes in ECG signals is required for various purposes such as determination of heart rate, feature extraction and classification. The problem of automatic QRS detection in ECG signals is complicated by the presence of noise spectrally overlapping with the QRS frequency range. As a solution to this problem, we propose the use of least-squares-optimisation-based smoothing techniques that suppress the noise peaks in the ECG while preserving the QRS complexes. We also propose a novel nonlinear transformation technique that is applied after the smoothing operations, which equalises the QRS amplitudes without boosting the supressed noise peaks. After these preprocessing operations, the R-peaks can finally be detected with high accuracy. The proposed technique has a low computational load and, therefore, it can be used for real-time QRS detection in a wearable device such as a Holter monitor or for fast offline QRS detection. The offline and real-time versions of the proposed technique have been evaluated on the standard MIT-BIH database. The offline implementation is found to perform better than state-of-the-art techniques based on wavelet transforms, empirical mode decomposition, etc. and the real-time implementation also shows improved performance over existing real-time QRS detection techniques.

Determination of Optimal Parameters of the X-Ray Source on the Basis of Compact Electron Accelerators

2015 ◽  
Vol 1084 ◽  
pp. 111-114
Author(s):  
Yury Cherepennikov ◽  
Alexey Gogolev ◽  
Alexander Wagner ◽  
Alexander Yuzhakov
Keyword(s):  
Electron Beam ◽  
Radiation Intensity ◽  
Electron Accelerator ◽  
Medical Diagnostics ◽  
Optimal Parameters ◽  
X Ray ◽  
Electron Accelerators ◽  
Simulation Results

The paper discusses the issue of creating a monochromatic X-ray source based on a small-size electron accelerator to be used for the purposes of medical diagnostics. We carried out the simulation of X-ray spectra generated by an electron beam with the energy of 4-10 MeV in the targets of different materials and thicknesses and determined the optimal parameters of the target. The radiation intensity was estimated and sources based on different accelerators were compared, with due consideration of the simulation results.

Automatic determination of primary electron beam parameters in Monte Carlo simulation

2007 ◽  
Vol 34 (3) ◽  
pp. 1076-1084 ◽  
Author(s):  
Javier Pena ◽  
Diego M. González-Castaño ◽  
Faustino Gómez ◽  
Francisco Sánchez-Doblado ◽  
Guenther H. Hartmann
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Electron Beam ◽  
Primary Electron ◽  
Automatic Determination ◽  
Primary Electron Beam ◽  
Beam Parameters

Time and Latitude in South Africa

1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers
Keyword(s):  
South Africa ◽  
Cape Town ◽  
Astronomical Observations ◽  
Royal Observatory ◽  
The Republic ◽  
Astronomical Determination ◽  
Limited Accuracy ◽  
Better Than

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.

The Analysis of Dislocations Using a Symmetry Criterion

1972 ◽  
Vol 30 ◽  
pp. 660-661
Author(s):  
J. C. Ingram ◽  
P. R. Strutt ◽  
Wen-Shian Tzeng
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Displacement Field ◽  
Standard Technique ◽  
Residual Image ◽  
Symmetry Criterion

The invisibility criterion which is the standard technique for determining the nature of dislocations seen in the electron microscope can at times lead to erroneous results or at best cause confusion in many cases since the dislocation can still show a residual image if the term is non-zero, or if the edge and screw displacements are anisotropically coupled, or if the dislocation has a mixed character. The symmetry criterion discussed below can be used in conjunction with and in some cases supersede the invisibility criterion for obtaining a valid determination of the nature of the dislocation.The symmetry criterion is based upon the well-known fact that a dislocation, because of the symmetric nature of its displacement field, can show a symmetric image when the dislocation is correctly oriented with respect to the electron beam.

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