Shiwei Xu

ORCID: 0000-0003-4739-8186
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About
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Research Areas
  • Physics of Superconductivity and Magnetism
  • Wastewater Treatment and Nitrogen Removal
  • Coagulation and Flocculation Studies
  • Membrane Separation Technologies
  • Superconductivity in MgB2 and Alloys
  • Electrochemical Analysis and Applications
  • Analytical chemistry methods development
  • Aluminum Alloy Microstructure Properties
  • Fusion materials and technologies
  • Advanced materials and composites
  • Advanced Welding Techniques Analysis
  • Analytical Chemistry and Sensors
  • Carbon dioxide utilization in catalysis
  • Minerals Flotation and Separation Techniques
  • Heavy metals in environment
  • Chemical Synthesis and Analysis
  • Magnetic and transport properties of perovskites and related materials
  • Carbohydrate Chemistry and Synthesis
  • ZnO doping and properties
  • Superconducting Materials and Applications
  • Analytical Methods in Pharmaceuticals
  • Coal and Its By-products
  • Water-Energy-Food Nexus Studies
  • Radioactive element chemistry and processing
  • Iron-based superconductors research

Northeastern University
2016-2025

Huazhong University of Science and Technology
2024

Advanced Technology & Materials (China)
2019-2020

Jiangsu Academy of Agricultural Sciences
2016-2020

East China University of Science and Technology
2018

China University of Geosciences (Beijing)
2014

Beijing Drainage Group (China)
2014

Shenzhen University
2014

Heilongjiang University of Technology
2011

The dynamic variation in soluble EPS resulted into the fluctuation of activated sludge dewatering behavior full-scale WWTPs.

10.1039/c4ra13379j article EN RSC Advances 2014-11-24

Two‐way shape changing polymers are attractive in recent years. In this short communication, carbon black (CB)/shape memory polyurethane (SMPU)‐elastic (EPU) laminated composite is prepared and electro‐active two‐way behavior reported for the first time. First, CB/SMPU demonstrates good recovery due to electricity conduction. When film elongated form polymer laminates by combining with EPU substrate, resulted CB/SMPU‐EPU laminate shows behavior, e.g., bending applying electric current,...

10.1002/pc.22958 article EN Polymer Composites 2014-03-06

Abstract A novel flux‐pinning design for REBa 2 Cu 3 O 7‐δ (REBCO) films intended high‐field magnet applications is proposed, which based on BaCuO nanorods in Gd 0.5 Yb Ba (Gd BCO) films. The metal–organic chemical vapor deposition (MOCVD) process has been developed to achieve the desired microstructure. influence of MOCVD parameters microstructure and critical current behavior BCO systematically investigated. morphology density crystallites within are highly sensitive temperature, oxygen...

10.1002/smll.202409125 article EN Small 2025-03-18

Abstract We study the feasibility of persistent-mode operation a high temperature superconducting (HTS) magnet with flux pump for magnetic resonance imaging (MRI). For experiment, non-insulated REBCO pancake coil was constructed, featuring an inner diameter 30 mm, outer 112 and inductance 12 mH. The current loop magnet, switch joints had resistance 2.67×10 -9 Ω at 77 K caused by soldered between tapes. A coupled section wire in to compensate energy dissipation assembly due its...

10.1088/1361-6668/addaf1 article EN Superconductor Science and Technology 2025-05-20

The critical current behavior of REBa2Cu3O7−δ (REBCO, with RE = Yb, Y, Ho, Dy, Gd, Eu, GdYb, DyY, GdY, EuY, SmY, GdEu, GdSm) superconducting tapes has been systematically studied for the temperature range 10–77 K, magnetic field 0–5 T and orientation (angle between tape) 0°–180°. We report that size dependencies in-field density (Jc) at low temperatures (below 40 K) are significantly different from those 77 K. In a 1–3 applied Jc REBCO films increases ionic radius (r). EuBCO film, largest r...

10.1088/1361-6668/aae460 article EN Superconductor Science and Technology 2018-09-26

We have developed a thermo-compression soldering appliance for joining rare-earth barium copper oxide (REBCO) tapes with excellent control of process temperature and pressure. With this tool, we systematically investigated the effects parameters solder materials on electrical mechanical performances soldered joints between REBCO superconducting laminated stabilizers. Low resistivity about 30 nΩ·cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

10.1109/tasc.2019.2896459 article EN IEEE Transactions on Applied Superconductivity 2019-01-30

A multipass metal organic chemical vapor deposition (MOCVD) process has been optimized to fabricate REBa <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Cu xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">7-δ</sub> (REBCO) (RE= Gd+ Y with Gd/Y = 1) thin-film superconducting tapes high critical currents. Some optimum MOCVD parameters for are found be different from those single-pass process,...

10.1109/tasc.2016.2625759 article EN IEEE Transactions on Applied Superconductivity 2016-11-07

A highly efficient synthetic route has been established for the gram-scale production of fucose–aglycon (Fuc–Agl) and fucose–saccharosamine (Fuc–Sac) fragments in saccharomicins B. The β-glycosidic bonds within these structural components were formed through successive rhodium(II) Brønsted-acid-catalyzed glycosylation, utilizing a stable thioglycosyl donor. Subsequent steps involving installation protecting groups yielded functionalized that are suitable further assembly saccharomicins.

10.1021/acs.orglett.4c03599 article EN Organic Letters 2024-10-17

A no-insulation solenoid magnet for persistent mode operation has been designed and constructed. The closed loop assembly used a 172-m-long REBCO superconducting tape, including 130 m the magnet, 6 switch, 36 soldered joints. coil is of 30 mm ID, 68 OD, 40 length, 840 turns in 105 layers, inductance 20 mH. joint operating with field decay rate 18.8 ppm/h at temperature K. Its current 88.35 A, to achieve central magnetic 1.5 T. circuit resistance 1.04 × 10 <sup...

10.1109/tasc.2019.2900298 article EN IEEE Transactions on Applied Superconductivity 2019-03-15

A mechanistic model for the Claisen condensation of methyl acetate and dimethyl carbonate in presence sodium methoxide to malonate further protonation is proposed based on experimental computational results.

10.1039/c7nj04958g article EN New Journal of Chemistry 2018-01-01
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