A5064570991- Seismic Imaging and Inversion Techniques
- Diamond and Carbon-based Materials Research
- Physics of Superconductivity and Magnetism
- Hydraulic Fracturing and Reservoir Analysis
- Force Microscopy Techniques and Applications
- Semiconductor materials and devices
- Seismology and Earthquake Studies
- Seismic Waves and Analysis
- earthquake and tectonic studies
- NMR spectroscopy and applications
- Ion-surface interactions and analysis
- Advanced Condensed Matter Physics
- Hydrocarbon exploration and reservoir analysis
- Quantum and electron transport phenomena
- Superconducting Materials and Applications
- Structural Health Monitoring Techniques
- Metal and Thin Film Mechanics
- Geochemistry and Geologic Mapping
- Superconductivity in MgB2 and Alloys
- Magnetic and transport properties of perovskites and related materials
- Drilling and Well Engineering
- Plasmonic and Surface Plasmon Research
- GaN-based semiconductor devices and materials
- Advanced Materials Characterization Techniques
- Advanced Surface Polishing Techniques
Tsinghua University
2005-2025
Jiaxing University
2025
China International Engineering Design & Research Institute
2024-2025
Massachusetts Institute of Technology
2014-2023
Nanjing Agricultural University
2018-2022
Chinese Academy of Sciences
2006-2019
Hohai University
2019
Czech Academy of Sciences, Institute of Physics
2012-2019
Physical Sciences (United States)
2019
University of Chinese Academy of Sciences
2019
The confluence of our ability to handle big data, significant increases in instrumentation density and quality, rapid advances machine learning (ML) algorithms have placed Earth Sciences at the threshold dramatic progress. ML techniques been attracting increased attention within seismic community, and, particular, microseismic monitoring where they are now being considered a game-changer due their real-time processing potential. In review recent developments characterisation, we find strong...
A novel and efficient copper-catalyzed cascade cyclization/trifluoromethylthiolation of unactivated olefins has been achieved with the stable readily available AgSCF3 as SCF3 source. range SCF3-substituted pyrrolines have easily obtained under mild conditions in good yields via present process. This method represents a facile rapid access to valuable fluorine-containing groups, it is amenable gram-scale synthesis.
Abstract A photoredox catalyzed trifluoromethyl radical‐triggered trifunctionalization of 5‐hexenenitriles via cyano group migration is reported. The high chemo‐selectivity even in the presence aryl or heteroaryl groups as competitors. This protocol provides a facile access to broad scope CF 3 ‐containing compounds with molecular complexity and functional diversity. success gram‐scale reaction versatility products derivative synthesis illustrate potential value this transformation synthetic...
As sensitive human-environment systems, lake-intensive regions are critical governance areas for advancing global low-carbon development. Rapid economic growth has intensified the imbalance between carbon sources and ecological sinks in these regions. However, methods measuring territorial space budgets tailored to “production–living–ecological” functions underdeveloped, mechanisms driving risks remain unclear. To address issues, this study develops a spatial measurement model “carbon...
Abstract A key aspect of improving disaster prevention and mitigation in sustainable smart cities is to increase the sensory capabilities existing communication infrastructure, providing reliable information for urban management emergency situations. Distributed acoustic sensing (DAS) an advanced technology suitable this application because it has a wide range applications, including environmental awareness, structural health monitoring, warning. In study, field test data are measured by DAS...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFree-Radical Bromination of Selected Organic Compounds in WaterHenry Shaw, Howard D. Perlmutter, Chen Gu, Susan Arco, and Titos O. QuibuyenView Author Information Department Chemical Engineering, Chemistry Environmental Science, New Jersey Institute Technology, Newark, 07102 Chemistry, University the Philippines, Diliman, Quezon City 1101, Philippines Cite this: J. Org. Chem. 1997, 62, 2, 236–237Publication Date (Web):January 24,...
We report on the first unambiguous observation of macroscopic quantum tunneling (MQT) in a single submicron ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$ surface intrinsic Josephson junction (IJJ) by measuring its temperature-dependent switching current distribution. All relevant parameters were determined situ classical regime and used to predict behavior IJJ via MQT theory. Experimental results agree quantitatively with theoretical predictions,...
The postspinel transition is consistent with the 660 discontinuity • Clapeyron slope of boundary -2.5 MPa/K Discrepancy in previous studies likely due to technical issues
The relationship between the cuprate pseudogap (Δ(p)) and superconducting gap (Δ(s)) remains an unsolved mystery. Here, we present a temperature- doping-dependent tunneling study of submicron Bi(2)Sr(2)CaCu(2)O(8+δ) intrinsic Josephson junctions, which provides clear evidence that Δ(s) closes at temperature T(c) (0) well above transition but far below opening T*. We show pairing first occurs predominantly on limited Fermi surface near node (0), accompanied by arc due to lifetime effects...
Small earthquakes occur due to natural tectonic motions and are induced by oil gas production processes. In many oil/gas fields hydrofracking processes, result from fluid extraction or injection. The locations source mechanisms of these provide valuable information about the reservoirs. Analysis seismic events has mostly assumed a double-couple mechanism. However, recent studies have shown non-negligible percentage non-double-couple components moment tensors in hydraulic fracturing events,...
The self-heating effect on intrinsic tunneling spectra (ITSs) is investigated using stacks of Josephson junctions (IJJs) in near optimally doped ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}\mathrm{Ca}{\mathrm{Cu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$ crystals. area the $S$ ranges from 12 down to $0.16\phantom{\rule{0.3em}{0ex}}\ensuremath{\mu}{\mathrm{m}}^{2}$. For IJJs with larger $S$, ITSs are distorted by self-heating, but become progressively less size dependent as decreases submicrometer...
Research Article| August 23, 2017 Source Mechanism Study of Local Earthquakes in Kuwait Chen Gu; Gu aEarth Resources Laboratory, Department Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute Technology, Cambridge, 02139 U.S.A., guchch@mit.edu Search for other works by this author on: GSW Google Scholar Farah Al‐Jeri; Al‐Jeri bKuwait Scientific Research, City 13109, Abdullah Al‐Enezi; Al‐Enezi Oral Büyüköztürk; Büyüköztürk cLaboratory Infrastructure Science Sustainability,...
A recent study attributed the source of an iron partitioning change between silicate melt and minerals at deep mantle conditions to a high‐spin low‐spin in iron, which was found Fe‐diluted Mg‐silicate glass similar pressure. We conducted X‐ray emission spectroscopy nuclear forward scattering on iron‐rich glasses high pressure 300 K diamond‐anvil cell: Al‐free up 135 GPa Al‐bearing 93 GPa. In both glasses, spin moment decreases gradually from 1 bar does not reach complete state even peak...
Superconducting Nb thin films with rectangular arrays of submicron antidots (holes) have been systemically investigated by transport measurements. A series crossover behaviors is found in magnetoresistance oscillations, corresponding to three different superconducting states: the wire network-like state, interstitial vortex state and single-loop–like state. These states are identified field intervals hysteretic effect. The fields between them be both temperature geometry dependent....
The transport ac loss Q in a superconducting cylinder of radius with power-law current-voltage characteristic E=Ec∣J∕Jc∣n as function current amplitude Im is numerically calculated for set given values a,Jc, and frequency f at n=5, 10, 20, 30. After deriving scaling law defining critical fc, the results can be converted interpolated to those any a, Jc, f, 5⩽n⩽30. “power-law” Q(Im) f=fc better alternative critical-state Q(Im), used not only describing features Q(Im,f) high-temperature...
We report a kind of subwavelength, compound hole arrays formed by two nested sub-lattices used to modulate the Fano resonance spoof surface plasmons (SSPs). Experiments complemented with numerical simulations show that asymmetry parameter (q) line shape can be tuned artificially and continuously: q value experiences sign reversal varies linearly variation size. The coupling between different SSP modes is suggested responsible for tunability in arrays.
Abstract Strong spin orbital interaction (SOI) can induce unique quantum phenomena such as topological insulators, the Rashba effect, or p-wave superconductivity. Combining these three into a single compound has important scientific implications. Here we report experimental observations of consecutive phase transitions from type trivial to insulator state then further proceeding superconductivity in SOI BiTeI tuned via pressures. The electrical resistivity measurement with V shape change...
We present transport measurement results on superconducting Nb films with diluted triangular arrays (honeycomb and kagom\'{e}) of holes. The patterned have large disk-shaped interstitial regions even when the edge-to-edge separations between nearest neighboring holes are comparable to coherence length. Changes in field interval two consecutive minima dependent resistance $R(H)$ curves observed. In low region, fine structures $T_c(H)$ identified both arrays. Comparison experimental data...