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In this paper, the advanced application of intelligent substation condition monitoringsystem as the research background, the introduction of remote monitoring and diagnosissystem architecture center system, the equipment condition monitoring information in realintroduction to the equipment life cycle management, and property associated with the devicebody, will greatly enhance the accuracy of the...
A new monitoring method using distributed optical temperature measurement to measure the temperature of reactor is put forward in the paper. The paper describes the characteristics of the system, and also provides an arrangement scheme of fiber to en-sure the system running well. Good man-machine interface of the system will help staff to check the temperature easily, and send warning signal.
We investigate the optical and transport properties of single GaAs/AlGaAs core-multishell Quantum Well Tube (QWT) nanowire heterostructure. The QWT is defined by a thin (8 nm) GaAs layer embedded inside a thick Al0.4Ga0.6As shell which surrounds a 50 nm diameter GaAs NW core see Fig.1. The electrons and holes in the thin GaAs shell are radially confined and are free along the nanowire length. The...
In order to achieve online monitoring the downhole information related to ESP working state, an ESP downhole parameters monitoring system based on current loop data transmission method was developed. Compared with other methods, the current loop data transmission method was relatively insensitive to interference in harsh environment. By means of ESP motor's winding and symmetrical reactance located...
In consideration of the complex condition of down hole environment, an ESP down hole multi-parameter comprehensive measurement system was designed in this paper in order to monitor the down hole information. Firstly, structures of the up hole section and down hole section of the system were introduced respectively. Then some key technologies on the system were illustrated in detail which consists...
Optical pump-terahertz probe spectroscopy was used to study the key electronic properties of GaAs, InAs and InP nanowires at room temperature. Of all nanowires studied, InAs nanowires exhibited the highest mobilities of 6000 cm2V−1s−1. InP nanowires featured the longest photoconductivity lifetimes and an exceptionally low surface recombination velocity of 170 cm/s.
To monitor the Electric Submersible Pump (ESP) running state, a multi-sensor down hole test system was designed in this paper. It is the important corollary equipment of the ESP. It can offer a number of detailed parameters of down hole environment. Therefore, this can raise the working reliability and utilizing efficiency of ESP. First, considering the condition of high temperature, high pressure...
The pulA gene enconding a thermostable pullulanase of 844 amino acids was cloned by PCR amplification from the genomic DNA of Thermotoga maritima MSB8. We successfully expressed the pulA gene in a protease-deficient strain Bacillus subtilis WB600, and the expressed pullulanase was secreted into the culture broth. Preliminary results showed that the pullulanase exhibited optimal activity at 90°C, and...
The high-voltage transformer substation is a special environment with high voltage and strong magnetic field. The temperatures of transmission circuitry joints in substations may increase for many reasons to initiate fire and explosion. A hierarchical clustering wireless sensor network (WSN) based on multi-agent system (MAS) is provided in this paper. Sustainable power-supplied nodes are appointed...
We investigate the growth of III-V nanowires by MOCVD and the structural and optical properties of these nanowires. Binary and ternary nanowires of GaAs, InAs, InP, AlGaAs and InGaAs are achieved. We discuss the nucleation and growth issues involved in fabricating high quality nanowires suitable for device applications. We have fabricated and characterised a variety of axial and radial heterostructures...
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