ORCID Profile
0000-0002-5398-1151
Current Organisation
University of California, Berkeley
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Publisher: Springer Science and Business Media LLC
Date: 03-2016
Publisher: Elsevier BV
Date: 2015
Publisher: Elsevier BV
Date: 10-2018
Publisher: Elsevier BV
Date: 03-2018
Publisher: Elsevier BV
Date: 10-2018
Publisher: Elsevier BV
Date: 06-2018
Publisher: Elsevier BV
Date: 02-2022
Publisher: Elsevier BV
Date: 11-2022
Publisher: Taiwan Association for Aerosol Research
Date: 2020
Publisher: Elsevier BV
Date: 11-2017
Publisher: Elsevier BV
Date: 04-2021
Publisher: Elsevier BV
Date: 12-2015
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 04-2016
Publisher: Elsevier BV
Date: 10-2020
Publisher: Elsevier BV
Date: 11-2022
DOI: 10.1016/J.SCITOTENV.2022.157811
Abstract: We evaluated diurnal trends of size-resolved indoor and outdoor fluorescent biological airborne particles (FBAPs) and their contributions to particulate matter (PM) within 0.5-20 μm. After a ten-week continuous s ling via two identical wideband integrated bioaerosol sensors, we found that both indoor and outdoor diurnal trends of PM were driven by its bioaerosol component. Outdoors, the median [interquartile range] FBAP mass concentration peaked at 8.2 [5.8-9.9] μg/m
Publisher: Elsevier BV
Date: 09-2016
Publisher: Elsevier BV
Date: 07-2022
Publisher: Elsevier BV
Date: 08-2022
Publisher: Elsevier BV
Date: 12-2014
Publisher: Elsevier BV
Date: 10-2018
Publisher: Elsevier BV
Date: 11-2015
Publisher: Taiwan Association for Aerosol Research
Date: 2022
DOI: 10.4209/AAQR.220204
Publisher: Elsevier BV
Date: 07-2020
Publisher: Informa UK Limited
Date: 03-12-2020
Publisher: Elsevier BV
Date: 2015
Publisher: Elsevier BV
Date: 06-2018
Publisher: MDPI AG
Date: 12-12-2021
Abstract: The SARS-CoV virus spreads in the atmosphere mainly in the form of aerosols. Particle air filters are widely used in indoor heating, ventilation, and air-conditioning (HVAC) systems and filtration equipment to reduce aerosol concentration and improve indoor air quality. Requirements arise to rate filters according to their mass-based filtration efficiency. The size distribution of test aerosol greatly affects the measurement results of mass-based filtration efficiency and dust loading of filters, as well as the calibration of optical instruments for fine-particle (PM2.5) mass concentration measurement. The main objective of this study was to find a new method to generate a chemically nontoxic aerosol with a similar particle size distribution to atmospheric aerosol. We measured the size distribution of aerosols generated by DEHS (di-ethyl-hexyl-sebacate), PSL (poly-styrene latex), olive oil, and 20% sucrose solution with a collision nebulizer in a wide range of 15 nm–20 μm. In idually, none of the solutions generated particles that share a similar size distribution to atmospheric aerosol. We found that the 20% sucrose solution + olive oil mixture solution (Vss:Voo = 1:2) could be used to generate a chemically nontoxic aerosol with similar particle number/volume size distribution to the atmospheric aerosol (t-test, p 0.05). The differences in the mass-base filtration efficiency measured by the generated aerosol and the atmospheric aerosol were smaller than 2% for MERV 7, 10, 13, and 16 rated filters. The aerosol generated by the new method also performed well in the calibration of optical-principle-based PM2.5 concentration measurement instruments. The average relative difference measured by a tapered element oscillating microbalance (TEOM) and a Dusttrak Model 8530 (calibrated by aerosol generated by the new method) was smaller than 5.8% in the real-situation measurement.
Publisher: Elsevier BV
Date: 05-2017
Publisher: Elsevier BV
Date: 11-2017
Publisher: American Chemical Society (ACS)
Date: 10-12-2020
Publisher: Springer Science and Business Media LLC
Date: 03-11-2016
Publisher: AIP Publishing
Date: 08-2023
DOI: 10.1063/5.0159621
Abstract: The environment inside airliner cabins has attracted increasing attention. Instantaneous airflow, as one of the fundamental parameters of airflow field, affects aspects of the airliner cabin environment such as occupant comfort and airborne disease transmission. This study evaluated the characteristics of instantaneous airflow in airliner cabins with different ventilation systems (mixing ventilation and displacement ventilation) and focused on the region above passengers' heads, where complex turbulence characteristics are found. This investigation used ultrasonic anemometers for measurements at ten selected points above passengers' heads. The energy ratio on the low-frequency scale with mixing ventilation was greater than that with displacement ventilation. The instantaneous airflow with mixing ventilation was close to that of natural wind, while the instantaneous airflow with displacement ventilation was close to that of mechanical wind. Compared with mixing ventilation, displacement ventilation produced a smaller vortex length and a shorter residence time. Moreover, there was no long-term vortex in the flow field under displacement ventilation, and therefore, pollutants would be discharged more quickly from the cabin. In addition, this paper distinguishes the spatial and temporal turbulence scales of mixing and displacement ventilation, thus providing a reference for the selection of grid size and time steps in computational fluid dynamics simulations.
Publisher: Elsevier BV
Date: 08-2023
Publisher: Elsevier BV
Date: 12-2018
Publisher: Elsevier BV
Date: 2022
Publisher: Hindawi Limited
Date: 04-05-2020
DOI: 10.1111/INA.12678
Publisher: Elsevier BV
Date: 09-2023
Publisher: American Chemical Society (ACS)
Date: 05-2018
DOI: 10.1021/ACS.NANOLETT.8B00427
Abstract: Freestanding nanomaterials (such as nanowires, nanoribbons, and nanotubes) are known to exhibit ultralarge elastic strains and ultrahigh strengths. However, harnessing their superior intrinsic mechanical properties in bulk composites has proven to be difficult. A recent breakthrough has overcome this difficulty by using a martensitic phase transforming matrix in which ultralarge elastic strains approaching the theoretical limit is achieved in Nb nanowires embedded in the matrix. This discovery, breaking a long-standing challenge, still limits our ability of harnessing the exceptional properties of nanomaterials and developing ultrahigh strength bulk materials to a narrow selection of phase transforming alloy matrices. In this study, we investigated the possibility to harness the intrinsic mechanical properties of nanoinclusions in conventional dislocation slip matrix based on a principle of synergy between the inclusion and the matrix. The small spacing between the densely populated hard and dislocation-impenetrable nanoinclusions departmentalize the plastic matrix into small domains to effectively impede dislocation motion within the matrix, inducing significant strengthening and large local elastic strains of the matrix, which in turn induced large elastic strains in the nanoinclusions. This dual phase synergy is verified in a Ti
Publisher: Elsevier BV
Date: 04-2018
Location: Singapore
Location: United States of America
Location: Australia
Location: No location found
No related grants have been discovered for Jiayu Li.