Optical system

For secure communications, the authors propose a underwater wireless optical communications code-division multiple-access (UOWC/CDMA) system with multiple relay assistance. Relay nodes employ the Chip Detect-and-Forward (CDF) technique to prevent the difficult multiuser decoding procedure. The proposed system performance, in terms of bit-error rate (BER) and transmission confidentiality, is analyzed in our study over fading channel.

11p vithomson 02-07-2024 0 0   Download

In this study, we suggested an FSO system with RIS assistance to mitigate the effects of signal blockage in the communication system, atmospheric turbulence, and UAV’s misalignment-induced fading. In a free-space environment with obstacles, the probability density function and cumulative distribution functions of an FSO system made up of RIS are derived.

8p vithomson 02-07-2024 0 0   Download

Part 1 book "LAN wiring" included contents: Designing LAN wiring systems; popular LAN topologies; structured cabling systems, LAN wiring for future needs; wire and cable technology for LANs; work area outlets; telecommunication room terminations; patch panels, cross connects, and patch cords; user cords and connectors; open office wiring; fiber optic techniques; gigabit and 10 gigabit cabling technology; wireless LANs

370p dianmotminh04 12-07-2024 1 1   Download

Part 2 of ebook "Experimental and theoretical advances in fluid dynamics" provides readers with contents including: multiphase flow and porous media; convection, diffusion and heat transfer; rheology and granular media; viscous flow; gallery of fluids; visualization of structures in non homogeneous flows; oil filaments produced in a stirred tank; fiber optic micro-bubble generator; dipolar vortex in a rotating system; super free fall of liquids in conical containers;...

266p tuongmothua 11-07-2024 0 0   Download

Part 2 of ebook "Medical imaging systems: An introductory guide" provides readers with contents including: Chapter 7 - X-ray imaging; Chapter 8 - Computed tomography; Chapter 9 - X-ray phase contrast, research on a future imaging modality; Chapter 10 - Emission tomography; Chapter 11 - Ultrasound; Chapter 12 - Optical coherence tomography;...

142p daonhiennhien 03-07-2024 2 1   Download

Part 2 book "Vehicle and automotive engineering" includes content: Intelligent transportation systems to support production logistics, a new scheduling software for supporting automotive component manufacturing, an overview of autonomous intelligent vehicle systems, software reliability of complex systems focus for intelligent vehicles, usage of an optical flow sensor in robotics to define orientation,... and other contents.

260p dianmotminh03 17-06-2024 0 0   Download

We present a novel low-power architecture for the generation of multilevel pulse amplitude modulation (PAM-4) signal generation. A new structure of a micro-ring resonator based on a 44 MMI (Multimode interference) coupler is proposed to control the coupling coefficient and Fano shapes.

11p viambani 18-06-2024 1 1   Download

Part 1 of ebook "Theory and design of charged particle beams" provides readers with contents including: Chapter 1 - Introduction; Chapter 2 - Review of charged particle dynamics; Chapter 3 - Beam optics and focusing systems without space charge; Chapter 4 - Linear beam optics with space charge;...

326p giangdongdinh 28-05-2024 3 2   Download

The purpose of this Encyclopedia of Multimedia Technology and Networking is to offer a written compendium of human knowledge related to the emerging multimedia digital metamarket. Multimedia technology, networks and online interactive multimedia services are taking advantage of a series of radical innovations in converging fields, such as the digitization of signals, satellite and fibre optic based transmission systems, algorithms for signal compression and control, switching and storage devices, and others, whose combination has a supra-additive synergistic effect.

1637p zizaybay1103 29-05-2024 2 2   Download

The encyclopedia provides valuable reference material for those working in the field who wish to know more about a topic outside their area of expertise, as well as providing an authoritative reference source for students and researchers. Undergraduate students should find it a useful source of material, as will teachers and lecturers.

2285p vimeyers 29-05-2024 4 2   Download

Part 1 of ebook "Device applications of nonlinear dynamics" provides readers with contents including: opening plenary talk; nonlinear dynamics, materials and sensing devices; noise induced switching between oscillation states in a nonlinear micromechanical oscillator; nonadiabaticity in modulated optical traps; signal processing and control in nonlinear nanomechanical systems; signal modulation by martensitic control of shape memory alloy thin film actuator architectures;...

146p dongmelo 26-05-2024 3 2   Download

Part 2 book "Electrical wiring industrial" includes content: Motor installation, power factor, ventilating, air conditioning, and other facilities, system protection, lightning protection, site lighting, programmable logic controllers, developing a program for a plc, fiber optics, hazardous locations, harmonics

181p dianmotminh01 20-05-2024 5 2   Download

Part 2 of ebook "Random light beams: Theory and applications" provides readers with contents including: Chapter 4 - Electromagnetic stochastic beams theory; Chapter 5 - Interaction of random electromagnetic beams with optical systems; Chapter 6 - Random beams in linear random media; Chapter 7 - Mitigation of random media effects with random beams; Chapter 8 - Weak scattering of random beams;...

241p dongmelo 21-05-2024 1 1   Download

Part 1 book "Automotive exhaust emissions and energy recovery" includes contents: Emissions mitigation and control systems, experimental investigation of in cylinder nox and soot formation by means of optical techniques in a CR diesel engine fuelled with oxygenated fuel, emissions in diesel engine with different rates of EGR, particulate matter emissions during transient diesel engine operation with various diesel/biofuel blends (Biodiesel, Ethanol and N-Butanol).

142p dianmotminh01 14-05-2024 0 0   Download

In this paper, we present an in-house flexible and portable lidar system integrating an inexpensive, passively Q-switched laser Nd: YAG and a detection module operating in both analog and photon counting mode. This system is designed to study the atmospheric boundary layer (BL) and cirrus clouds (CC). The passively Q-switched Nd:YAG pulsed laser, operating at a second-harmonic generation (SHG) wavelength of 532 nm, features a pulse energy up to 200 mJ, a repetition rate of 1 Hz to 15 Hz, and a pulse duration of 15 ns.

14p dianmotminh02 03-05-2024 6 1   Download

Ebook "Ultrashort laser pulses in biology and medicine" gives an overview of biological and medical applications of these laser pulses. The briefness of these laser pulses permits the tracing of the fastest processes in photo-active bio-systems, which is one focus of the book. The other focus is applications that rely on the high peak intensity of ultrashort laser pulses. Examples covered span non-linear imaging techniques, optical tomography, and laser surgery.

326p ladongphongthanh1008 22-04-2024 3 2   Download

Part 2 book "Electrical and electronics measurements and instrumentation" includes content: Cathode ray oscilloscope, electronic instruments, sensors and transducers, magnetic measurements, signal generators and analysers, data acquisition system, recording, storage and display devices, programmable logic controllers, microwave and RF measurement, fibre optic measurements.

346p dianmotminh00 22-04-2024 6 3   Download

Part 1 book "Introduction to quantum optics - From the semi-classical approach to quantized light" includes content: The evolution of interacting quantum systems; the semi classical approach - atomsinteracting with a classical electromagnetic field, principles of lasers, quantization of free radiation.

372p muasambanhan10 11-04-2024 3 1   Download

Ebook "Stochastic chemical kinetics: Theory and (mostly) systems biological applications" reviews the theory and simulation methods of stochastic kinetics by integrating historical and recent perspectives, presents applications, mostly in the context of systems biology and also in combustion theory. In recent years, due to the development in experimental techniques, such as optical imaging, single cell analysis, and fluorescence spectroscopy, biochemical kinetic data inside single living cells have increasingly been available.

174p tudohanhtau1006 29-03-2024 4 1   Download

Ebook "Calculations on nonlinear optical properties for large systems: The elongation method" describes the quantum-mechanical treatment of the response to one or more external oscillating electric fields for molecular and macroscopic, crystalline systems. To calculate NLO properties of large systems, a linear scaling generalized elongation method for the efficient and accurate calculation is introduced.

106p tudohanhtau1006 29-03-2024 3 1   Download