Transmission studies

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

Part 2 book "Hybrid electric power train engineering and technology - Modeling, control, and simulation" included contents: Basic design requirements of an energy storage unit equipped with battery, basic hybrid power trains modeling and simulation, fundamentals of hybrid power trains equipped with planetary transmission, basic simulation study during the process of designing the hybrid power train equipped with planetary transmission,... and other contents.

229p dianmotminh04 12-07-2024 1 0   Download

Part 2 book "An introduction to - Modern vehicle design" included contents: Occupant accommodation - an ergonomics approach; suspension systems and components; control systems in automobiles; the design of engine characteristics for vehicle use; transmissions and driveline; braking systems; failure prevention - The role of endurance and durability studies in the design and manufacture of reliable vehicles; future trends in automobile design.

353p dianmotminh04 12-07-2024 0 0   Download

Transforming growth factor-β (TGF-β) is a cytokine with multiple functions, including cell growth regulation, extracellular matrix production, angiogenesis homeostasis adjustment and et al. TGF-β pathway activation promotes tumor metastasis/progression and mediates epithelial-mesenchymal transmission suppressing immunosurveillance in advanced tumors.

13p vishanshan 27-06-2024 2 1   Download

The aim of the present study was to assess whether the e-mail transmission of photographs of suspected melanoma lesions between general practitioners (GPs) and dermatologists reduces the time to dermatological consultation for patients whose suspicious skin lesions ultimately require resection.

9p vishanshan 27-06-2024 3 1   Download

The magnetic properties of core/shell nanoparticles (NPs) depend on the various parameters, including the magnetic interactions, but these effects have not been well studied. Here, we systematically investigated the structure and magnetic properties of Fe3O4@CoFe2O4 core/shell NPs. X-ray diffraction (XRD), scanning electron microscopy (SEM), and scanning transmission electron microscopy (STEM) confirmed the formation of Fe3O4@CoFe2O4 core/shell NPs.

6p visergeyne 18-06-2024 0 0   Download

This study proposes a solution that allows quick test firing and conserves rounds when directly testing ground artillery targets via the VRP712/S data transmission systems developed by the group that serves the Viettel defence industry. As a result, the authors have built a software system for quick test firing at the ground artillery company.

11p viambani 18-06-2024 5 1   Download

Part 1 book "Energy systems - Intelligent solutions for electricity transmission and distribution networks" includes content: A methodology for web based power systems simulation and analysis using PHP programming; integration of dispersed power generation, islanding detection methods for distributed pv systems overview and experimental study, the use of plc technology for smart grid applications over the MV grid - the dg paradigm,... and other contents.

156p dianmotminh03 11-06-2024 9 4   Download

Part 2 book "Motor vehicle engineering" includes content: Lubrication; transmission; suspension; brakes; steering, wheels and tyres; electrical and electronic systems; body, chassis and fittings; preparing vehicles; servicing; the business; background studies; evision, the web and what next.

173p dianmotminh03 11-06-2024 2 1   Download

This paper explores the spillover effect and trading volume of Financial, Technology, and FinTech Exchange Traded Funds (ETFs) by using ARMA-GARCH model. The study finds significant interconnectedness and interdependencies between these ETF sectors and the stock market index, indicating the transmission of shocks and volatility. Market fluctuations plays a crucial role in influencing the ETF sectors, with negative shocks impacting volatility more prominently.

21p dathienlang1012 03-05-2024 0 0   Download

A theoretical study of sound transmission loss across a simply supported double-composite sandwich plate filled with poroplastic material is formulated. Biot's theory is employed to describe wave propagation in elastic porous media. The two face composite plates are modeled as classical thin plates. By using the modal superposition theory, a double series solution for the sound transmission loss of the structure is obtained with the help of the Galerkin method.

10p dathienlang1012 03-05-2024 0 0   Download

Nano-hydroxyapatite/starch composite was synthesized using in situ precipitation. Starch concentration effect on the structure of composite was examined. Characterization of the obtained samples, The X-ray diffraction and Fourier transform infrared spectroscopy demonstrated the purity of the formed nano-HA in the starch matrix. Morphology studies of the samples, checked by field emission scanning electron microscope and transmission electron microscope, show the effects of starch on the size, shape, and morphology of hydroxyapatite nanoparticles.

6p dianmotminh02 03-05-2024 5 1   Download

In this article, the authors present new models of protection that allow to simulate the overcurrent relay, instantaneous overcurrent relay and differential relay by using Matlab/Simulink. Initially, a methodology that presents how to build a library, including the different models and their communication architectures. Secondly, a case study in 220 kV transmission systems is selected as an example for fault simulation and relay testing for each relay model and the coordination protection.

13p dianmotminh02 03-05-2024 8 3   Download

This study aims to explore the transmission of pollutants from the domestic wastewater of the Rach Tram - Phu Quoc eco-urban project. To achieve this, the Ecolab module of the Mike model is employed. The dispersion of pollutants is influenced by both hydraulic and wind conditions. Notably, under southwest wind condition, the dispersion of pollutants is considerably more pronounced compared to that observed during the Northeast monsoon.

16p dianmotminh02 03-05-2024 4 2   Download

The purpose of this paper is to determine the relevance of turning the camera on or off during distance learning as an argument for active or passive student participation. Seventy-five (75) students participated in the study and were divided into five groups (1-5) according to teaching method (i.e., synchronous instruction online with camera (1) and without camera (2), synchronous transmission of the recording online with camera (3) and without camera (4) and received the online instruction (5)) only.

13p viarnault 25-04-2024 2 1   Download

Part 1 book "Transients in electrical systems - Analysis, recognition, and mitigation" includes content: Introduction to transients, transients in lumped circuits, control systems, modeling of transmission lines and cables for transient studies, lightning strokes, shielding, and back flashovers, transients of shunt capacitor banks, switching transients and temporary over voltages, current interruption in ac circuits, symmetrical and unsymmetrical short circuit currents, transient behavior of synchronous generators,... and other contents.

379p dianmotminh00 22-04-2024 15 9   Download

Part 1 book "Transmission and distribution electrical engineering" includes content: System studies, drawings and diagrams, substation layouts, substation auxiliary power supplies, current and voltage transformers, insulators, substation building services, earthing and bonding, insulation co ordination, relay protection, fuses and miniature circuit breakers, cables.

453p dianmotminh00 22-04-2024 14 5   Download

Part 1 book "Transmission and distribution electrical engineering" includes content: System studies, drawings and diagrams, substation layouts, substation auxiliary power supplies, current and voltage transformers, insulators, substation building services, earthing and bonding, insulation co ordination, relay protection, fuses and miniature circuit breakers, cables, switchgear.

538p dianmotminh00 22-04-2024 8 4   Download

The present paper examines the actual problem of changing conditions of competition in the electricity market, considering the peculiarities of its development in the context of global changes and digitalization. This study is aimed at developing approaches to mitigate state and interstate regulation of the development of competitive market conditions through the creation of prerequisites for freer competition.

6p longtimenosee09 08-04-2024 8 3   Download

This paper aims to improve and study the man-machine interaction defects of mould case circuit breaker. By changing the interface information layout, the interface information transmission effect was enhanced, with user pressure in information reading reduced

4p visergey 02-04-2024 0 0   Download