A5052043342- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- Silicon Carbide Semiconductor Technologies
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Microgrid Control and Optimization
- Crystallography and molecular interactions
- Advanced Battery Technologies Research
- Seismic Imaging and Inversion Techniques
- Hydrocarbon exploration and reservoir analysis
- Stock Market Forecasting Methods
- Induction Heating and Inverter Technology
- Black Holes and Theoretical Physics
- Islanding Detection in Power Systems
- Chaos control and synchronization
- Particle physics theoretical and experimental studies
- Hydraulic Fracturing and Reservoir Analysis
- NMR spectroscopy and applications
- Time Series Analysis and Forecasting
- Neural Networks and Applications
- Noncommutative and Quantum Gravity Theories
- Chaos-based Image/Signal Encryption
- Underwater Acoustics Research
- Quantum Chromodynamics and Particle Interactions
- Cosmology and Gravitation Theories
Beijing Institute of Technology
2015-2025
Beijing Jiaotong University
2024
Chinese Academy of Sciences
2015-2024
Chongqing University of Posts and Telecommunications
2024
Shanghai Institute of Microsystem and Information Technology
2024
ShanghaiTech University
2024
Yunnan University
2015-2023
Shenyang University of Technology
2023
Wuhan University of Technology
2012-2022
China University of Petroleum, East China
2018-2021
To determine the occurrence mechanism and mobility of shale oil in Shahejie Formation Jiyang Depression, organic geochemistry analysis, thin-section petrological observation, low-temperature nitrogen adsorption, high-pressure mercury intrusion porosimetry, field emission scanning electron microscopy experiments were conducted on samples to reveal its storage mechanism, including pore size, ratio adsorbed free oil, influencing factors, mode storage. Residual is mainly present pores less than...
There are many hydrogen-bearing components in shale, including kerogen, free oil, adsorbed water, and structural water. Measuring the content distribution of each component is important to understand occurrence mechanism shale oil. The nuclear magnetic resonance (NMR) T1–T2 map can be used as a non-destructive technique distinguish shale. In this paper, we examine relaxation characteristics clay minerals continental under different oil or water conditions using high-resolution low-field NMR...
A modulation scheme for dual active bridge converter is proposed to achieve zero voltage switching (ZVS) and reduce the conduction loss in this article. To compromise ZVS achievement loss, optimized working modes are derived from different cases. Compared with phase shift triple modulations, article can both light load heavy load. Therefore, be reduced, efficiency loads improved. However, cannot seamless transient among modes, which may cause oscillation mode transition. employing...
The input-series-output-parallel (ISOP) connection, consisting of multiple modular dc/dc converters connected in series at the input and parallel output, is a good alternative to be used under high-voltage applications with low-voltage-rating switches. A novel output-current-sharing scheme, one output-voltage loop individual output-currents loops, proposed this paper. provides common reference for all current loops which feedback an converter not its own, but sum remaining output currents....
Input-series-output-series (ISOS) connected dc-dc converters enable the utilization of low-voltage rating switches in high-voltage-input and high-voltage-output applications that require galvanic isolation. To achieve input or output power balance among all constituent modules, a general control strategy eliminating use input-voltage sharing (IVS) loops is proposed. The instability mechanism independent output-voltage has been investigated by using Routh-Hurwitz criterion. From same...
Current-fed bidirectional dc-dc converters have attracted much attention in battery energy storage system applications due to their zero-voltage-switching performances and greater degree of control freedom. However, high efficiency cannot be achieved for both light heavy load ranges with the present modulation schemes a current-fed converter, especially low voltages. A new scheme is proposed improve conversion over wide range variations voltage. The relationship between duty cycle secondary...
This letter proposes an input-series-output-parallel derived dc-dc converter composed of two phase-shift full-bridge (PSFB) converters and auxiliary LC networks. Each network is connected between the leading-leg midpoint a module lagging-leg other one. For conventional PSFB converters, switches may lose zero-voltage switching (ZVS) conditions at light loads. In proposed converter, ZVS for can be achieved with aid networks even The efficiency load improved. Therefore, suitable wide range....
Predicting the stock market has become an increasingly interesting research area for both researchers and investors, many prediction models have been proposed. In these models, feature selection techniques are used to pre-process raw data remove noise. this paper, a model is constructed forecast behavior with aid of independent component analysis, canonical correlation support vector machine. First, two types features extracted from historical closing prices 39 technical variables obtained...
Tribological phenomena abundantly exist in living beings, especially human such as teeth, eyes, bones, skins, heart valves and so on, it is meaningful to reveal the mechanism of tribology body fabricate artificial biomaterials replace damaged tissues release pain patients. Alloys, ceramics polymers are three uppermost materials used engineering some them play a crucial role biomedicine. In paper, we provide an overview tribological behaviors including alloys, polymers. We aim fundamental...
This study presents voltage magnitude and frequency control of a three-phase source inverter for distributed generations to achieve seamless transfer between grid-tied mode intentional islanding mode. When the grid is normal, works in On contrary, when fault occurs, breaker connecting must be turned off just supplies power local loads. By varying output voltage, an control, with which active reactive can precisely controlled, presented. To improve transient response, virtual inductor...
In this paper, we propose and implement a hybrid model combining two-directional two-dimensional principal component analysis ((2D)2PCA) Radial Basis Function Neural Network (RBFNN) to forecast stock market behavior. First, 36 technical variables are selected as the input features, sliding window is used obtain data of model. Next, (2D)2PCA utilized reduce dimension extract its intrinsic features. Finally, an RBFNN accepts processed by next day's price or movement. The proposed on Shanghai...
An improved three-level (TL) dc-dc converter is proposed in this paper. The contains two transformers. Like the conventional TL converter, there are no additional switches on primary side of transformer. rectifier stage composed four diodes center-tapped rectification. On transformer, transformers connected series. middle node to neutral point split flying capacitors. Because it cooperates with four-diode stage, circulating current transformer decays zero during freewheeling period....
A dual-active-bridge (DAB) converter with parallel-connected full bridges in low-voltage side is proposed this paper. coupling inductor integrated into the two low-voltage-side for zero-voltage-switching (ZVS) operation throughout full-load range. By analyzing working modes of converter, ZVS range derived. To compromise and conduction loss caused by inductor, modulation trajectory designed terms boundary conditions The compared conventional DAB which illustrates that only increased under...
This article presents a control strategy for the single-stage dual active bridge (DAB) ac-dc converters. To reduce conduction loss and achieve zero voltage switching (ZVS), global optimal working modes are reviewed. Based on modes, input current of DAB converter is analyzed sinusoidal voltage. The algorithm proposed to unit power factor with minimum stress ZVS. range meet wide load power. mode varied line-frequency angle power, which guarantees that works in modes. variation series...
Poverty threatens human development especially for developing countries, so ending poverty has become one of the most important United Nations Sustainable Development Goals (SDGs). This study aims to explore China's progress in reduction from 2016 2019 through time-series multi-source geospatial data and a deep learning model. The efficiency (PRE) is measured by difference out-of-poverty rates (which measures probability being not poor) 2019. shows that all regions China shown an overall...
Abstract 2D magnetic semiconductors exhibit great potential for next‐generation spintronics, but realizing their full capabilities has been hindered by the low Curie temperatures ( T c ) below 50 K observed in current materials. Here, a new mechanism to substantially enhance of semiconducting materials through incorporating both in‐plane and out‐of‐plane superexchange interactions enabled structural design is demonstrated. Specifically, monolayer Cr 2 Se 3 synthesized with five‐layer...