A5041644918- Non-Destructive Testing Techniques
- Advanced Sensor and Control Systems
- Welding Techniques and Residual Stresses
- Ultrasonics and Acoustic Wave Propagation
- Flow Measurement and Analysis
- Advancements in Battery Materials
- Advanced Algorithms and Applications
- Supercapacitor Materials and Fabrication
- Advanced Battery Materials and Technologies
- Magnetic Properties and Applications
- Advanced Measurement and Detection Methods
- Structural Integrity and Reliability Analysis
- Geophysical Methods and Applications
- Embedded Systems and FPGA Design
- Water Systems and Optimization
- Industrial Vision Systems and Defect Detection
- Water Quality Monitoring Technologies
- Advanced Computational Techniques and Applications
- Oil and Gas Production Techniques
- Nanomaterials for catalytic reactions
- Power Line Communications and Noise
- Advanced battery technologies research
- Hydrogen embrittlement and corrosion behaviors in metals
- Ammonia Synthesis and Nitrogen Reduction
- Corrosion Behavior and Inhibition
Beihang University
2019-2024
Henan Polytechnic University
2024
Shenyang University of Technology
2010-2022
Shenyang University of Chemical Technology
2010
Multi-wall Sn/SnO2 @carbon hollow nanofibers evolved from SnO2 are designed and programable synthesized by electrospinning, polypyrrole coating, annealing reduction. The have a special wire-in-double-wall-tube structure with larger specific surface area abundant inner spaces, which can provide effective contacting of electrolyte electrode materials more active sites for redox reaction. It shows excellent cycling stability virtue effectively alleviating pulverization tin-based caused volume...
Abstract The rational synergy of chemical composition and spatial nanostructures electrode materials play important roles in high‐performance energy storage devices. Here, we designed pea‐like MoS 2 @NiS 1.03 –carbon hollow nanofibers using a simple electrospinning thermal treatment method. hierarchical nanofiber is composed nitrogen‐doped carbon‐coated NiS tube wall, which uniformly discrete nanoparticles are enclosed. As sodium‐ion battery material, the have abundant diphasic...
In order to solve the problem of low detection accuracy small targets in SSD algorithm, a pipeline magnetic flux leakage image algorithm based on multiscale network is proposed this paper. The dilated convolution and attention residual module are introduced into fuse low-resolution high-semantic information feature map with high-resolution low-semantic so as improve resolution provide detailed features for targets. Finally, target location category obtained by regression algorithm....
Abstract It is highly desired but challenging to design high performance catalyst for selective hydrogenation of nitro compounds into amino compounds. Herein, a boosting chemoselective strategy on Pt@Fe 2 O 3 proposed with gradient oxygen vacancy by synergy hydrogen spillover and preferential adsorption. Experimental theoretical investigations reveal that the preferentially adsorbed onto , meanwhile, H dissociated Pt nanoparticles then approach (>99% conversion 4‐nitrostyrene, > 99%...
Abstract 2D layered molybdenum disulfide (MoS 2 ) has garnered considerable attention as an attractive electrode material in sodium‐ion batteries (SIBs), but sluggish mass transfer kinetic and capacity fading make it suffer from inferior cycle capability. Herein, hierarchical MoS nanosheets decorated porous TiO nanofibers NSs@TiO NFs) with rich oxygen vacancies are engineered by microemulsion electrospinning method subsequent hydrothermal/heat treatment. The NFs improves ion/electron...
Abstract Multi‐wall Sn/SnO 2 @carbon hollow nanofibers evolved from SnO are designed and programable synthesized by electrospinning, polypyrrole coating, annealing reduction. The have a special wire‐in‐double‐wall‐tube structure with larger specific surface area abundant inner spaces, which can provide effective contacting of electrolyte electrode materials more active sites for redox reaction. It shows excellent cycling stability virtue effectively alleviating pulverization tin‐based caused...
The current development of oil-gas pipeline magnetic flux leakage (MFL) testing sensor, this paper discussed working principle and application the coil sensor Hall element sensor. two types sensors in practical applications were analyzed for their characteristics. article evaluates situation proposes MFL direction.
Improving the alkyne hydrogenation activity and selectivity of Pd catalysts is great significance through structural design surface electron regulation. In this study, an electron-deficient nanoparticles on mesoporous...
Oil-gas pipelines Magnetic flux leakage (MFL) inspection, the reconstruction of defects shape is key pipeline inspection integrity evaluation, identifying would lead to a better maintenance plan. In this paper, Support Vector Machine (SVM) method used in features. Collecting 450 terms data 30 from field-testing, by training, establish MFL library based on samples three different signal characteristics. MATLAB as platform made experimental, verify accuracy defect classification and...
Abstract This study proposes a grid-coil-type transducer to achieve the simultaneous detection of axial and circumferential cracks in pipeline, reduce number permanent magnets dynamic detection, improve crack efficiency. The proposed system can detect biaxial pipeline. Based on Biot–Savart’s Law, mathematical model is established between magnetic induction intensity coil electromagnetic acoustic determine influence conductor. Experiments verify relationship guided wave propagation...
Abstract Solar‐driven semiconductor photocatalysts for solving global energy shortage and environmental pollution have attracted massive attention. Multi‐structure hollow nanofibers (MSHFs) photocatalyst offers many advantages, including abundant surface area multiple light harvesting interface redox reaction, heterostructured thin shell expediting charge separation transportation large length‐diameter ratio easily recycling. Herein, we summarize the latest development of MSHFs materials in...
Accurate differentiation of whether the defect position is located on inside or outside surface necessary in low-frequency electromagnetic detection technique (LFET) oil and gas pipelines. We design a set composite probe arrays that consisted inductive magnetic coils (LFET coils) eddy current testing (ECT) to accomplish comprehensive inspection, meanwhile, theoretical calculation analysis mutual interference mechanism between LFET ECT were mainly implemented. Experimental result demonstrates...
Aiming to the low accuracy IMU's initial alignment issue related pipeline's geographical coordinate measuring system (PGC), PGC method is introduced. The coarse used resolve large angle error at first, and then precise done in small range. In process, irstorder Markov process separate white noise, 13 dimension states equation are built; unscented particle kalman filtering (UPF) nonlinear problem that caused by attitude angle. experiment shows mentioned above can effectively mproves of PGC.
Magnetic tomographic is a new and nondestructive testing technology based on the metal magnetic memory method, which can perform noncontact outside pipeline. To identify type of defect from characteristics field signal detected by this we performed basic research propagation mechanism pipe. In paper, model stress concentration zone was first discussed dipole theory. A 3-D formulation spatial signals method built, Biot–Savart law vector potential. The reliability verified comparing with...
This work aimed to investigate the distribution characteristics of low-frequency magnetic flux leakage (LF-MFL) field defect on oil and gas pipelines in electromagnetic detection technique (LFET). Taking four types crack defects (rectangular, semicircular, trapezoidal, V-shaped grooves) with equal lengths, widths different bottom shapes into consideration, specific mathematical model LF-MFL was inferred established basis dipole theory. Experimental results demonstrated that variation values...