A5080958503- Reservoir Engineering and Simulation Methods
- Hydraulic Fracturing and Reservoir Analysis
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Drilling and Well Engineering
- GaN-based semiconductor devices and materials
- Oil and Gas Production Techniques
- Galaxies: Formation, Evolution, Phenomena
- Antenna Design and Optimization
- Advanced Sensor and Control Systems
- Semiconductor materials and devices
- Advanced Computational Techniques and Applications
- Embedded Systems and FPGA Design
- Enhanced Oil Recovery Techniques
- Advanced Algorithms and Applications
- Radio Wave Propagation Studies
- Speech and Audio Processing
- Speech Recognition and Synthesis
- Image and Object Detection Techniques
- Geoscience and Mining Technology
- Infrared Target Detection Methodologies
- Advanced Measurement and Detection Methods
- Acoustic Wave Resonator Technologies
- Geophysical Methods and Applications
- Music and Audio Processing
Research Institute of Petroleum Exploration and Development
2017-2024
Yangzhou University
2024
Suzhou Institute of Nano-tech and Nano-bionics
2023-2024
Chinese Academy of Sciences
2018-2023
National Astronomical Observatories
2018-2021
Université Paris-Sud
2018
Centre National de la Recherche Scientifique
2018
University of Chinese Academy of Sciences
2018
China National Petroleum Corporation (China)
2017
Academy of Military Transportation
2009-2012
ABSTRACT Ground-based observation at frequencies below 30 MHz is hindered by the ionosphere of Earth and radio frequency interference. To map sky these low frequencies, we have proposed Discovering Sky Longest wavelength mission (DSL, also known as ‘Hongmeng’ mission, which means ‘Primordial Universe’ in Chinese) concept, employs a linear array micro-satellites orbiting Moon. Such an can make interferometric observations achieving good angular resolutions despite small size antennas....
Abstract In this paper, we explore the electrical characteristics of high-electron-mobility transistors (HEMTs) using a TaN/AlGaN/GaN metal insulating semiconductor (MIS) structure. The high-resistance tantalum nitride (TaN) film prepared by magnetron sputtering as gate dielectric layer device achieved an effective reduction electronic states at TaN/AlGaN interface, and reducing leakage current MIS HEMT, its performance was enhanced. HEMT exhibited low 2.15 × 10 −7 mA/mm breakdown voltage...
The Tianlai Pathfinder is designed to demonstrate the feasibility of using a wide field view radio interferometers map density neutral hydrogen in Universe after Epoch Reionizaton. This approach, called 21~cm intensity-mapping, promises an inexpensive means for surveying large-scale structure cosmos. presently consists array three, 15~m $\times$ 40~m cylinder telescopes and sixteen, 6~m diameter dish antennas located radio-quiet part western China. two types arrays were chosen determine...
Radio astronomical observation below 30 MHz is hampered by the refraction and absorption of ionosphere, radio frequency interference (RFI), so far high angular resolution sky intensity map not available. An interferometer array on lunar orbit provides a perfect observatory in this band: it out ionosphere Moon helps to block RFIs from Earth. The satellites can make observations side then send back data near part orbit. However, for such traditional imaging algorithm applicable: field view...
GaN metal–insulator–semiconductor high electron mobility transistors (MIS-HEMTs) with scandium aluminum nitride Sc0.2Al0.8N/SiNX composite gate dielectric were demonstrated improved device performance in terms of current density, on-resistance, breakdown voltage, leakage, and collapse. MIS-HEMTs single-layer Sc0.2Al0.8N or SiNX also fabricated as reference. Notably, the collapse was reduced from ∼38.8% to ∼4.9% dielectric. The insertion thin layer can mitigate surface damage due ScAlN...
According to the characteristics of these pressure waveforms, we firstly design gross structure acquisition system and make matching triggering circuits corresponding AC1030 card. Secondly place a sampling length interface through programming, meanwhile circularly start up A/D conversion, so way memory memorizer changes into ring type. Lastly playback process data in virtual instrument. The experimental result shows that has got good waveforms achieved expected result.
Abstract This paper illustrates innovative application of integrated subsurface and surface optimization well placement in stacked heavy light oil reservoirs M field, Sudan. Upper B reservoir is massive bottom water with burial depth 700 m. Well productivity was low, 200 to 300 BOPD under CHOPS, resulting denser spacing extensive deployment flowlines, de-sanding equipment etc., often forcing vertical infill wells drilled as directional due footprints limitation. Lower AG stratified gas...
Extracting the neutral hydrogen (HI) signal is a great challenge for cosmological 21cm experiments, both astrophysical foregrounds and receiver noise are typically several orders of magnitude greater than signal. However, different properties signal, foreground, can be exploited to separate these components. The generally smooth or correlated over frequency space along line sight (l.o.s.), while varies stochastically same l.o.s. foreground removed by filtering out component in space....
This paper presents a novel method for processing of the pressure waveform based on Wavelet analysis. de-noising and decomposition coefficient are introduced emphatically by MATLAB language. Results show that new algorithm is feasible efficient.
This paper brought up a novel 4H-SiC U-shaped trench- gate MOSFET to increase the devices' performance. The new-structured device featured step-shaped bottom corner in its P+ source area and an extra n-type shielding area. To verify performance, series of simulation was operated using Silvaco TCAD. showed 36% breakdown voltage. Meanwhile, could reduce on-resistance by 36%. As result, obtain 71% enhancement figure merit (FOM).
This paper presents a novel endpoint detection method based on Cepstral Mean Subtraction (CMS) for robust and accurate speech recognition in noisy environments. The improved CMS applies Hidden Markov Model (HMM) to do two-step classification better performance, using the optimal spectral feature subset extracted according rule of minimum conditional entropy. In addition, reduce misrecognition due similarity between unvoiced sound white noise cepstral feature, we apply weighted smoothing...
In order to separate the target particles from other background grain noise and needless particles, flat performance, rectangle performance digital measurement parameters of particle region are calculated. However, smallest outer-rectangle in appoint is one most necessary middle parameters, traditional symmetry matrix QR algorithm fail dispose region. this paper, main vector transform method introduced feature extraction binary image, process was deduced algorithm. Experimental results...
Aim at the difficulties of measuring special pressure waveform, a set data acquisition system based on AC1030 high-speed card has been developed. According to characteristics these waveforms, we firstly design gross structure and make matching triggering circuits corresponding card. Secondly place sampling length interface through programming, meanwhile circularly start up A/D conversion, so way memory memorizer changes into ring type process automatic continuous sampling. Lastly playback in...
Abstract This paper demonstrates successful application of parallel appraisal and development in G field, Niger. field is a complicated stacked light oil reservoir with gas cap its E2 major pool. After current operator's takeover 2008, the government required realization 10 KBOPD this within 3 years, leaving only 1 year for as construction landlocked country at least takes 2 years. Whereas there was 2D seismic one well data (G-1) RFT testing, strategy must be adopted following challenges...
The neutral hydrogen 21cm line is potentially a very powerful probe of the observable universe, and number on-going experiments are trying to detect it at cosmological distances. However, presence strong foreground radiations such as galactic synchrotron radiation, free-free emission extragalactic radio sources make challenging task. For design analysis their data, simulation an essential tool, good sky model needed. With existing data whole maps available only in low angular resolutions or...