With the development of digital nuclear pulse processing technology, the requirements for the analog front-end circuit of digital energy spectrometers are getting higher and higher. Not only need to reduce the noise caused by the device as much as possible, but also need to meet the needs of multi-channel data acquisition. This article based on VGA (Variable Gain Amplifier) has designed a multi-channel low-noise analog front-end circuit to meet the functional requirements of the energy spectrome...

Electric Engineering  Nuclear Engineering 

The vehicle-borne radiation environmental monitoring system is not restricted by time, location and weather, and in the event of a sudden nuclear accident, it can quickly enter the accident site and monitor the ambient reflectivity level and absorbed air dose rate at the first time. At the same time, the vehicle-borne data communication and processing system is used to transmit the real-time data to the platform of emergency monitoring and dispatching, which provides powerful technical support f...

Electric Engineering  Industrial Engineering 

We buy home appliances every once in a while, and we are adding another Remote controller to our homes, and every device has its own remote control. Thus, the purpose of our work is to control all home devices via the Internet and get rid of using multiple Remote Controls. In this paper, we propose a smart remote controller that can be controlling all home devices and operate them through Internet using the mobile app and it contains a self-learning feature and the ESP8266 is used as a microcont...

Electric Engineering  Computer Engineering 

The West-African electricity market remains relatively undeveloped with a low access rate. Indeed, there is a rather paradoxical context between on the one side, the availability of primary energy resources, and on the other side, its affordability and its reliability. This paper aimed at 1) analyzing the effect of economic and special planning variables as well as institutional infrastructures on the access rate; and 2) understanding how well the supra-national cooperation can contribute to imp...

Electric Engineering 

In the following article, results of the investigation on the effect of feeding subsynchronous currents from the electric grid in the generator are presented. In the end, torsional oscillations of the shaft train are excited, which can reach very high amplitudes in case of resonance. In time with the torsional oscillations, the synchronous generated voltage induced in the stator winding oscillates, which leads to the feed of subsynchronous currents from the generator into the electrical network....

Electric Engineering 

In this paper, the electrically assisted pressure solid-phase welding of titanium alloy plate is studied. Two different sizes of dies are used to apply pressure to the specimens. At the same time, electric current is applied to the specimens which are in plastic compression deformation. After welding, the joint strength is evaluated by tensile tests. The results show that for the small dies, the optimal thickness reduction corresponding to the maximum fracture load for a given current intensity ...

Electric Engineering 

In recent years, the global demand for oil has been increasing. In order to reduce production costs, horizontal drilling technology is basically used for deep oil storage, so a cable-driven downhole towing system (horizontal well tractor) has emerged. The traditional horizontal well tractor drive motor has large volume, low efficiency, high vibration and noise, and cannot meet the requirements. Therefore, a permanent magnet synchronous motor with small size, light weight and high efficiency is p...

Electric Engineering 

Power electronic systems tend to be great contributors to faults in many applications especially wind turbines because they are exposed to harsh operation conditions in height. Thus, a great attention has been paid to fault diagnosis technologies. In this paper, the concept of an exact recovery under a sparse fault assumption is applied to the diagnosis of three-phase DC-AC power electronic inverter, this method is denoted as Sparse Recovery Diagnosis (SRD). This method has the advantage to reco...

Electric Engineering 

Disk and doughnut baffles configuration for shell tube heat exchangers (STHXs) is one of the solutions for compensating the higher pressure drop penalty induced by conventional segmental baffles. Furthermore, absently reliable references for the optimum design of this type of STHXs are our main purpose to carry out this investigation. From modeling numerical simulation results, with 7 baffles and 70% baffles ratio geometrical dimension is suggested the optimum configuration of this type of heat ...

Electric Engineering 

This inspection of electronic circuits can be performed either by connection with voltage supply and without voltage supply. However, inspections during the working circuit may invite serious harm and damage to the components in the circuit. Usually, the method used is to measure the current and voltage values in the circuit based on the reading reference when the circuit is in normal condition. There is another method that can help check the current circuit condition by using image processing m...

Electric Engineering