A5044649720- Geology and Paleoclimatology Research
- Aeolian processes and effects
- Dielectric materials and actuators
- Geological formations and processes
- Ferroelectric and Piezoelectric Materials
- Advanced Sensor and Energy Harvesting Materials
- Geological Studies and Exploration
- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- Acoustic Wave Resonator Technologies
- Accounting Education and Careers
- Dielectric properties of ceramics
- Clay minerals and soil interactions
- Climate variability and models
- Geographies of human-animal interactions
- Environmental Quality and Pollution
- Climate change and permafrost
- Soil erosion and sediment transport
- Financial Reporting and Valuation Research
- Multiferroics and related materials
- Research studies in Vietnam
- Geoscience and Mining Technology
- Plant Water Relations and Carbon Dynamics
East China Normal University
2020-2023
Southwestern University of Finance and Economics
2020
University of Helsinki
2015-2018
Vrije Universiteit Amsterdam
2016-2018
Chinese Academy of Sciences
2008-2011
Shanghai Institute of Technical Physics
2008-2011
Jilin University
2008-2010
Shandong University of Finance and Economics
2001
Abstract The Yangtze Delta (YD), as one of the world mega deltas, its formation process has long been subject research. Previous study proposed a remote connection Yellow River (YR) to building YD over past 600–400 years. However, complex source‐sink routing system sediment and lack diagnostic provenance tools have hampered further understanding this process. Inferred from detrital zircon U‐Pb geochronology, revealed an increased significant contribution reworked YR (up 26%) since ca. 500...
During the late Neogene, global climate underwent a long-term transition to cooler climates that culminated in Quaternary icehouse conditions. In East Asian terrestrial realm, atmospheric dustiness increased, and volume of aeolian dust deposits expanded significantly. The Neogene Red Clay deposits, located on Chinese Loess Plateau (CLP), provide an exceptional geologic archive investigate pre-Quaternary environments. Constraining provenance is crucial for unravelling links between...
Poly(vinylidene fluoride-trifluoroethylene-chlorofloroethylene) terpolymer films have been fabricated on Al-coated polyimide substrates using the Langmuir–Blodgett (LB) technology. The electrical properties of investigated from 150 to 350 K. temperature dielectric maximum and measured frequency obeys Vogel–Fulcher [J. Am. Ceram. Soc. 8, 339 (1925); Phys. Z. 22, 645 (1921)] law. electric tunabilities at room are 42.6% 80% under 50 240 MV/m, respectively. reasons for high tunability discussed...
The poly(vinylidenefluoride-trifluoroethylene-chlorofluoroethylene) terpolymer (56.2/36.3/7.5, mol %) films from 1.6 to 10 nm in thickness were prepared by the Langmuir–Blodgett method. dielectric and ferroelectric properties of investigated. phase transition less 3.2 exhibits a ferroelectric-like nature, which is inconsistent with bulk terpolymers. peak permittivity at ∼360 K, much higher than thick it independent on frequency. Both polarization-electric field capacitance-voltage curves...
Abstract Relaxor ferroelectric terpolymer, Poly (vinylidene fluoride-trifluoroethylene-chlorofloroethylene) can be applied in many modern electronics systems. In this paper, the terpolymer films were deposited on aluminum-coated silicon substrates by horizontal Langmuir-Blodgett technology. The X-ray diffraction pattern indicates that have good crystallinity. optical dispersion of measured variable-angle spectroscopic ellipsometry over a range from 300–1300 nm. data Ψ and Δ at multiple...
The capacitance of poly(vinylidenefluoride-trifluoroethylene) copolymer ultrathin films was investigated as a function frequency, ac drive, and temperature. In the ferroelectric (FE) phase, increases with drive shows an dielectric nonlinearity. On contrary, decreases in paraelectric (PE) phase. Since maximum is much smaller than coercive field, contribution polarization switching to increase can be ruled out. dependence believed reflect information molecular configuration, intra- interchain...
Electrical properties of poly(vinylidene fluoride trifluoroethylene) [P(VDF-TrFE)] copolymer thin film grown by sol-gel method on flexible polymer substrate were studied. Two types electrodes, NiFe and Al, employed to form NiFe/P(VDF-TrFE)/NiFe Al/P(VDF-TrFE)/Al capacitor structures. The capacitors with electrodes exhibit higher remnant polarization, lower coercive field, dielectric constant pyroelectric coefficient than the samples Al electrodes. improved can be attributed less defects,...
Abstract Polyvinylidene fluoride (PVDF) films and copolymer of vinylidene trifluoroethylene P(VDF-TrFE) have great potential applications in uncooled infrared detection due to their good pyroelectricities ferroelectricities. It is important investigate the mechanism electrical transport. In our present work, we found differential conductivities exhibit a sharp peak near coercive field. And it proposed that caused by delocalization polarons during polarization inversion. Keywords:...
Abstract Decades of violent upheaval during the Late Ming and Early Qing in Sichuan caused human population to decrease dramatically. Subsequent processes rewilding reveal tight connection between humans their environment as well interpretation such dramatic changes. First, irrigation facilities former agricultural landscape deteriorated along with decline population. Due lack labour, neglect ultimate collapse Dujiangyan system western province resulted rice-paddy agriculture becoming...