Search Results - Siwei Zhang
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Amplification Characteristics of a Coumarin 460-Based Tunable Amplifier
Published 2020-01-01Get full textWe studied the optical signal amplification properties of coumarin 460 (C460) in solution. An optical signal amplification experiment was performed using a side-pumping setup. Amplification of more than 7 dB was achieved over a 13-nm spectral width in the signal wavelength range of 448&am...
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Double Microwave Shielding
Published 2025-06-01Get full textWe develop double microwave shielding, which has recently enabled evaporative cooling to the first Bose-Einstein condensate of polar molecules [Bigagli et al., Nature 631, 289 (2024)]. Two microwave fields of different frequency and polarization are employed to effectively shield polar molecules fro...
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Exposure to indoor chemical pollutants and associated health risk assessment of residents in Shijiazhuang city
Published 2025-06-01Get full textBackgroundIndoor air quality directly affects people's health, especially the impact of chemical pollutants in residential indoor air on children and the elderly is more significant. ObjectiveTo understand the pollution status of common chemical pollutants in residential indoor air in Shijiazhu...
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Comparison of High-Efficiency MgO/Na<sub>2</sub>CO<sub>3</sub> and MgO/K<sub>2</sub>CO<sub>3</sub> as Heterogeneous Solid Base Catalysts for Biodiesel Production from Soybean Oil
Published 2025-07-01Get full textAs a renewable alternative to fossil fuels, the industrial production of biodiesel urgently requires the development of efficient and recyclable solid base catalysts. In this study, the physicochemical properties and catalytic performance differences between MgO/Na<sub>2</sub>CO<sub&g...
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