De En's research while affiliated with Henan Polytechnic University and other places
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Publications (19)
In the oilfield development stage, more recoverable reserves can be found by using the more sophisticated seismic methods with stimulation. Three-component seismic exploration technology comes into being, and it is becoming a major oil exploration seismic technology currently. As the sensitive element of seismic geophone, the performance of the har...
GPS information collecting and processing is an important part of the navigation and positioning system. Through the establishment of cross-compiler environment, using the ARM processor S3C2440A and Linux operating systems as the hardware and software platform and the GS87 is used as GPS receiver module, the NMEA-0183 communications protocol and se...
Dual M-Z interferometer is the sensitive element of three-component acceleration seismic geophone, while Y branch waveguide is the basic optical components composed of dual M-Z interferometer, so the design of Y branch waveguide directly affects the performance of three component acceleration seismic geophone. Firstly, branch waveguide and S-shaped...
Seismic exploration is a effective methods to ascertain underground structure and looking for oil. As the data collected in the wild are often subjected to the interference of noise, is not conducive to the analysis and interpretation of seismic data, therefore removing noise is the premise of data interpretation. To use the Fourier transform and w...
There is a very small additional current component of frequency in the stator current signal when motor has broken rotor bars.So adaptive notch filter is applied to process the signals of the stator current in induction motors.The variable step size LMS algorithm and the multiple-scale wavelet transform are merged into the adaptive filtering system...
In recent years, with the development of optical communication by leaps and bounds, promote the Micro-opto-electro-mechanical system (MOEMS) development. As a new technology, the MOEMS have been widely used in optical communication, optical switching, data storage, optical sensing and etc Compared with the traditional pressure sensors, the optical...
In order to improve the production of oil, natural gas, the development of mineral exploration technology is heading for 3D high-precision multi-component seismic exploration. And we found the dynamic behavior of detected signals by three-component acceleration seismic geophone has nonlinear, time-variation, multi-variable and strong-coupled. Aimin...
The shortest path is one of the key problems in the GPS vehicle navigation system. Genetic algorithm is one of the useful methods in solving the shortest path problem. First, the genetic algorithm is analyzed and improved. Its population is optimized before being initialized aiming at reducing the needless paths and nodes. A combination of roulette...
Due to the features of light weight, small size, high intelligence, MEMS is widely used in the field of nature and engineering science, such as communication, aerospace, biomedical and materials science and so on. In this paper, MEMS manufacturing process is introduced, the structure and working principle of MEMS’ acceleration seismic sensors are a...
Virtual instrument (VI) is the computer technology and traditional instrumentation technology product of the combination, and is an important direction of development of the instrument. LabVIEW is a graphical programing language based on virtual instrument software development tools. This paper uses the LabVIEW 2010 point-by-point analysis of the d...
The optical waveguides are produced in LiNbO 3 substrate of three-component acceleration seismic geophone by lithography. Three-component acceleration seismic geophone detects changes in the external acceleration by detecting phase changes in the optical waveguides. The performance of optical waveguide directly affects the performance of three-comp...
LoadRunner is a powerful tool for performance testing, facing the widely use of Financial Fusion's Message Oriented Middleware-Message Broker in a stated-owned bank, with the use the system hardware and software environment of the bank, build the performance testing program to test Message Broker. Using LoadRunner to achieve the Base Testing, Absol...
We found the dynamic behavior of detected signals by MOEMS three-component acceleration seismic geophone has nonlinear, time-variation, multi-variable and strong-coupled. We proposed a method used a multivariable fuzzy-neural net work decoupling controller, designed and simulated the corresponding decoupling scheme. The results show that this metho...
In the power electronic circuits, AC chopping control voltage regulation circuit through change the chopped device conduction time, it can easily change output voltage size. Load currents do not include low-order harmonic, they contain only higher harmonic which are relevant to the switch period T, they are easy to filter out. So the power efficien...
Micro-Opto-Electro-Mechanical System (MOEMS) has the advantages of small size, light weight, little energy consumption, high reliability, high-volume production and so on. Micro-sensor is a new generation of sensor being developed, improved and expanded, and it will have a huge effect on the measurement area of still adopted traditional sensors. Th...
Fiber Bragg Grating sensor is a kind of widely used new sensors. This paper presents a level based on fiber Bragg grating tilt sensor, with the variation of the tilt angle is converted to optical conversion of the change in deformation mechanism to achieve the measured level of relative horizontal angle measurement, sensor-related design theory is...
A LED lighting system in the modern theater and the corresponding control program is introduced. Studies show that moderate and mutative brightness in the space would attract audiences' attention on the screen easily. SCM controls LED dynamically by outputting PWM pulse in different duty cycle. That cinema dome lights' intensity can vary with the p...
For science and technology, the level of science and technology is
determined by the measurement accuracy and efficiency to some extent.
Contact resistance can not be ignored in precise measurement. Because
the measured object is not directly contacted with infrared measurement
device, there is no friction. Infrared measurement has the advantage of...
With the feature of energy-saving, reliability, long life and so on, LED lighting is considered as the next generation of mainstream lighting technology. Based on the characteristics of LED's higher switching speed than fluorescent lamp and incandescent, the technology that uses the white LED light source of interior lighting as the communication b...
Citations
... An improved version of GA is proposed and used for finding optimal path by En et al. (2012). The population set is optimized by omitting the unnecessary nodes and paths before algorithm initialization. ...
