An empirical research on the influencing factors of consumers’ intention to use “onehour e-commerce”: Taking JD Daojia as an example

The era of One-hour E-commerce has arrived, which is of positive significance to meet consumers\u27 needs and enhance their shopping experience. This paper constructs a structural model of the factors influencing consumers\u27 willingness to use Onehour E-commerce by using a Technology Acceptance Model with two additional factors: subjective norm and perceived risk. The model was validated through 347 valid questionnaires and analysis. The results showed that perceived usefulness, perceived ease of use and subjective norm positively affects consumers\u27 willingness to use One-hour E-commerce ; perceived ease of use positively affects consumers\u27 perceived usefulness; perceived risk does not negatively affect consumers\u27 willingness to use One-hour E-commerce . Based on the above findings, the following recommendations are made: accelerate integration improve the ecosystem; optimize the platform to enhance ease of use; improve delivery to strengthen user satisfaction; improve image to enhance customer service efficiency; focus on quality to improve risk awareness

Geochemical characteristics and implications of shale gas from the Longmaxi Formation, Sichuan Basin, China

AbstractGas geochemical analysis was conducted on the shale gas from the Longmaxi Formation in the Weiyuan-Changning areas, Sichuan Basin, China. Chemical composition was measured using an integrated method of gas chromatography combined with mass spectrometry. The results show that the Longmaxi shale gas, after hydraulic fracturing, is primarily dominated by methane (94.0%–98.6%) with low humidity (0.3%–0.6%) and minor non-hydrocarbon gasses which are primarily comprised of CO2, N2, as well as trace He. δ13CCO2 = −2.5‰−6.0‰3He/4He = 0.01–0.03Ra.The shale gas in the Weiyuan and Changning areas display carbon isotopes reversal pattern with a carbon number (δ13C1 > δ13C2) and distinct carbon isotopic composition. The shale gas from the Weiyuan pilot has heavier carbon isotopic compositions for methane (δ13C1: from −34.5‰ to −36.8‰), ethane (δ13C2: −37.6‰ to −41.9‰), and CO2 (δ13CCO2: −4.5‰ to −6.0‰) than those in the Changning pilot (δ13C1: −27.2‰ to −27.3‰, δ13C2: −33.7‰ to −34.1‰, δ13CCO2: −2.5‰ to −4.6‰). The Longmaxi shale was thermally high and the organic matter was in over mature stage with good sealing conditions. The shale gas, after hydraulic fracturing, could possibly originate from the thermal decomposition of kerogen and the secondary cracking of liquid hydrocarbons which caused the reversal pattern of carbon isotopes. Some CO2 could be derived from the decomposition of carbonate. The difference in carbon isotopes between the Weiyuan and Changning areas could be derived from the different mixing proportion of gas from the secondary cracking of liquid hydrocarbons caused by specific geological and geochemical conditions

A review on heterogeneous solid catalysts and related catalytic mechanisms for epoxidation of olefins with H2O2

The epoxidation reaction using heterogeneous solid catalysts with H2O2 as oxidants are environmentally friendly routes to produce extensively useful epoxides which are traditionally obtained from capital-intensive or environmentally polluted processes. In this paper, various types of solid catalysts for the epoxidation of olefins with H2O2 as oxidants are reviewed. The efficient catalysts reported include microporous and mesoporous molecular sieves, layered-type materials, inorganic oxides, supported catalysts, zeolite encapsulated metal complexes, polyoxometalates, and supported organometallic catalysts. The proposed reaction mechanisms over different solid catalysts are summarized. The problems and perspectives to further efficiently improve the catalytic performances of the concerned heterogeneous catalysts for epoxidation reaction are remarked

Control and Local Measurement of the Spin Chemical Potential in a Magnetic Insulator

The spin chemical potential characterizes the tendency of spins to diffuse. Probing the spin chemical potential could provide insight into materials such as magnetic insulators and spin liquids and aid optimization of spintronic devices. Here, we introduce single-spin magnetometry as a generic platform for non-perturbative, nanoscale characterization of spin chemical potentials. We use this platform to investigate magnons in a magnetic insulator, surprisingly finding that the magnon chemical potential can be efficiently controlled by driving the system's ferromagnetic resonance. We introduce a symmetry-based two-fluid theory describing the underlying magnon processes, realize the first experimental determination of the local thermomagnonic torque, and illustrate the detection sensitivity using electrically controlled spin injection. Our results open the way for nanoscale control and imaging of spin transport in mesoscopic spin systems.Comment: 18 pages, 4 figure