Oscillations

Để đánh giá vai trò của hệ thống dao động xung lực IOS (Impulse oscillation system) đo sức cản đường thở trong chẩn đoán hen phế quản ở trẻ em. Đối tượng và phương pháp: Nghiên cứu mô tả loạt ca bệnh trên 156 trẻ được chẩn đoán hen phế quản theo GINA (Global Initiative for Asthma) 2016 đã được lựa chọn.

7p visoros 01-11-2023 1 1   Download

Continued part 1, part 2 of ebook "Introduction to Mathematica for Physicists" provides readers with contents including: Chapter 13 - Packages; Chapter 14 - Plots; Chapter 15 - Trigonometric functions; Chapter 16 - Quantum oscillator; Chapter 17 - Spherical harmonics; Chapter 18 - Adding angular momenta in quantum mechanics; Chapter 19 - Classical nonlinear oscillator; Chapter 20 - Quantum nonlinear oscillator; Chapter 21 - Riemann curvature tensor; Chapter 22 - Multi-functions;...

106p dangsovu 20-10-2023 3 2   Download

Continued part 1, part 2 of ebook "Introduction to particle and astroparticle physics: Multimessenger astronomy and its particle physics foundations" provides readers with contents including: interactions and field theories; the higgs mechanism and the standard model of particle physics; the standard model of cosmology and the dark universe; the properties of neutrinos; messengers from the high-energy universe; astrobiology and the relation of fundamental physics to life;...

465p dangsovu 20-10-2023 1 1   Download

Part 1 of ebook "Introductory quantum mechanics: A traditional approach emphasizing connections with classical physics" provides readers with contents including: mathematical preliminaries; free-particle Schrödinger equation - wave packets; Schrödinger's equation with potential energy - introduction to operators; postulates and basic elements of quantum mechanics - properties of operators; simple harmonic oscillator - one dimension; problems in two and three-dimensions - general considerations;...

317p dangsovu 20-10-2023 2 1   Download

Part 1 of ebook "Physics of oscillations and waves: With use of Matlab and Python" provides readers with contents including: Chapter 1 - Introduction; Chapter 2 - Free and damped oscillations; Chapter 3 - Forced oscillations and resonance; Chapter 4 - Numerical methods; Chapter 5 - Fourier analysis; Chapter 6 - Waves; Chapter 7 - Sound; Chapter 8 - Dispersion and waves on water; Chapter 9 - Electromagnetic waves;...

304p dangsovu 20-10-2023 4 4   Download

Continued part 1, part 2 of ebook "Physics of oscillations and waves: With use of Matlab and Python" provides readers with contents including: Chapter 10 - Reflection, transmission and polarization; Chapter 11 - Measurements of light, dispersion, colours; Chapter 12 - Geometric optics; Chapter 13 - Interference diffraction; Chapter 14 - Wavelet transform; Chapter 15 - Coherence, dipole radiation and laser; Chapter 16 - Skin depth and waveguides;...

280p dangsovu 20-10-2023 4 2   Download

Ebook "Quantum mechanics for pedestrians 2: Applications and extensions" provides an introduction to the basics of nonrelativistic quantum mechanics. Originally written as a course for students of science education, the book addresses all those science students and others who are looking for a reasonably simple, fresh and modern introduction to the field.

587p dangsovu 20-10-2023 3 2   Download

Ebook "Problems in classical electromagnetism: 157 exercises with solutions" comprises 157 problems in classical electromagnetism, originating from the second-year course given by the authors to the undergraduate students of physics at the University of Pisa in the years from 2002 to 2017. Our course covers the basics of classical electromagnetism in a fairly complete way. In the first part, we present electrostatics and magnetostatics, electric currents, and magnetic induction, introducing the complete set of Maxwell’s equations.

452p dangsovu 20-10-2023 1 1   Download

In this ebook "Quantum mechanics for pedestrians 1: Fundamentals" the first in a two-volume set, provides an introduction to the fundamentals of (mainly) non-relativistic quantum mechanics. This first volume chiefly focuses on the essential principles, while applications and extensions of the formalism can be found in volume 2.

525p dangsovu 20-10-2023 2 1   Download

Ebook "Digital electronics demystified" includes content: The underpinnings of digital electronics, effectively optimizing combinatorial circuits, number systems, binary arithmetic using digital electronics, practical combinatorial circuit implementation, feedback and sequential circuits, oscillators,... and other contents.

385p haojiubujain07 20-09-2023 1 1   Download

Ebook "Electronics demystified" includes content: Direct current, alternating current, impedance and admittance, power supplies, emiconductor diodes, transistors and integrated circuits, signal amplifiers, signal oscillators, radio frequency transmitters, radio frequency receivers, telecommunications, communications antennas,... and other contents.

417p haojiubujain07 20-09-2023 1 1   Download

Ebook "Starting electronics" includes content: The very first steps; on the boards; measuring current and voltage; capacitors; ICS oscillators and filters; diodes I; diodes II; transistors; analogue integrated circuits; digital integrated circuits I; digital integrated circuits II.

289p haojiubujain07 20-09-2023 1 1   Download

In the paper, a black knifefish-inspired robot with an elongated undulating fin is investigated for locomotion control using an improved CPG model. The proposed CPG network has sixteen fin rays connected Hopf oscillators for creating fish-like swimming gaits. To identify a set of optimal parameters for the modified CPG network, mutant particle swarm optimization (MPSO), an improved form of particle swarm optimization (PSO), is introduced.

9p giangnhanly 02-10-2023 1 1   Download

This paper presents a solution to mitigate the influences of oscillations without the modification of the electric drives based on the utilization of the nonlinear control technique known as feedback linearization. The advantages of the proposed control method are low cost and straightforward to implement with the microcontroller unit. The effectiveness and robustness of this proposed control are verified through the analysis of simulation results and the comparison with PI control.

7p giangnhanly 02-10-2023 1 1   Download

Part 1 book "Practical electronics for inventors" includes content: Operational amplifiers, filters, oscillators and timers, voltage regulators and power supplies, digital electronics, programmable logic, microcontrollers, motors, audio electronics, modular electronics.

393p oursky03 21-08-2023 1 1   Download

Continued part 1, part 2 of ebook "Fundamentals of physics" provides readers with contents including: capacitance; current and resistance; magnetic fields; magnetic fields due to currents; induction and inductance; electromagnetic oscillations and alternating current; maxwell’s equations; magnetism of matter; electromagnetic waves; photons and matter waves; more about matter waves; conduction of electricity in solids; nuclear physics; energy from the nucleus;...

708p lytamnguyet 04-08-2023 4 1   Download

Part 1 of ebook "Problems in general physics" provides readers with content including: physical fundamentals of mechanics; elastic deformations of a solid body; thermodynamics and molecular physics; electrodynamics; motion of charged particles in electric and magnetic fields; oscillations and waves; the first law of thermodynamics, heat capacity; the second law of thermodynamics entropy; relativistic mechanics;...

205p lytamnguyet 04-08-2023 1 1   Download

The coexistence of the transverse and fast sounds of liquid metals in the terahertz range near the melting point is explained. These sound modes are phonon polaritons arisen from the interaction between the transverse collective ionic oscillations, known as phonons, and the electromagnetic wave radiated by the ions in vibration at high enough frequencies, for instance, in liquid Zn, Cu, and Fe.

7p viberkshire 09-08-2023 3 2   Download

This paper presents the finite element algorithm and results on dynamic response of cracked plate structure on elastic foundation subjected to moving oscillator with a constant velocity and any motion orbit. The response to a single moving oscillator is first investigated and then the effects of crack, velocity, elastic foundation stiffness, and stiffness of the spring of moving oscillator are studied.

7p viannee 04-08-2023 2 2   Download

This article presents the pseudospectral method to calculate numerical solutions for nonlinear Duffing differential equations on the interval [–1, 1]. This method is based on the differential matrix using the Chebyshev Gauss – Lobatto points. To find numerical solutions of the nonlinear Duffing differential equations, we have built an iterative procedure. The software is used in calculating in this study is Mathematica 10.4. The obtained results show that this method has high accuracy with very small errors.

9p nhanchienthien 25-07-2023 3 2   Download