46 research outputs found
Construct Humanized Off-site Enforcement System for Road Traffic Management
No full textAbstractTo increase the score of traffic violations for Motor vehicle drivers trigger social hot debate. The focus is the science of off- site enforcement evidence. The author discusses from the law content, evidence characteristics, problem analysis, coping strategies, and puts forward the idea of sustainable development for off-site enforcement
Mechanical Characteristics and Failure Mode of Asphalt Concrete for Ballastless Track Substructure Based on In Situ Tests
No full textAsphalt concrete paved on the surface of a roadbed as a ballastless track substructure has an excellent waterproofing and vibration attenuation performance. However, the mechanical characteristics and the failure mode of this structure under the actions of a cyclic train load and ambient air temperature changes are still unclear. Therefore, a test section of an asphalt concrete substructure was constructed based on a high-speed railway ballastless track project in north China. In situ forced vibration tests and temperature-induced deformation monitoring tests were performed to investigate the mechanical responses of the asphalt concrete, respectively. Test results show that the bottom of the asphalt concrete layer is in the tensile state under the action of the cyclic train load. The surface of the asphalt concrete in contact with the base plate is subjected to tensile stress near the expansion joint under the action of the negative temperature gradient. Changes in the ambient temperature lead to more significant mechanical responses of the asphalt concrete substructure than the cyclic train load, especially near the expansion joint of the base plate. Therefore, the passive tensile failure mode may occur near the expansion joint of the base plate. However, it has also proved that setting isolation layers under the base plate near the expansion joint is an effective method to significantly reduce responses near the expansion joint in this research
Protocols for "Draft genome of the Tibetan medicinal herb, Rhodiola crenulata" v1
No full textThis is a collection of protocols that accompany the Yuanyuan Fu, et. al 2017 GigaScience publication "Draft genome of the Tibetan medicinal herb, Rhodiola crenulata". </p
Large enhancement of thermoelectric performance of InTe compound by sintering and CuInTe2 doping
No full textTernary Chromium Chalcogenide: Facile Fabrication, Doping and Thermoelectric Properties
No full textEffect of Water Saturation on Gas-Accessible Effective Pore Space in Gas Shales
No full textAbstractThe existence and content of water will certainly affect the effective pore space of shales and therefore is a key point for the evaluation of in-situ gas content and gas flow capacity of shale reservoirs. In order to reasonably evaluate the gas storage and flow capacities of water-bearing shale reservoirs, the effect of water on the effective pore space of shales needs to be understood. In this study, the Upper Permian Longtan shale in the southeastern Sichuan Basin, China, was selected as an example to conduct nuclear magnetic resonance cryoporometry (NMRC) measurements under different water saturation levels. The gas-accessible effective pore spaces in shales under different water saturation levels were quantified, and the effect of water saturation on gas-accessible effective pore space in shales was investigated. The results show that water plays an important role in the gas-accessible effective pore space of shales. When the Longtan shale increases from a dry state to a water saturation of 65%, 75%, and 90%, the gas-accessible effective pore volume decreases by 35%-60% (average 46.3%), 50%-70% (average 58.8%), and 65%-82% (average 75.8%), respectively. Water has an effect on the gas-accessible effective pore space regardless of pore size, and the effect is the strongest in the 4-100 nm range, which may be mainly due to the high content of clay minerals in the Longtan shale. Our studies are of important theoretical significance and application prospects for accurately evaluating the gas-accessible effective pore space of gas shales under actual geological conditions
Large enhancement of thermoelectric properties in n-type PbTe via dual-site point defects
No full textDual-site point defects formed through partially dissolved Sb nanophases contribute to distortion of density-of-states and enhancement of phonon scattering.</p
