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Search: WFRF:(Luo Fa Long)

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1.
  • Beal, Jacob, et al. (author)
  • Robust estimation of bacterial cell count from optical density
  • 2020
  • In: Communications Biology. - : Springer Science and Business Media LLC. - 2399-3642. ; 3:1
  • Journal article (peer-reviewed)abstract
    • Optical density (OD) is widely used to estimate the density of cells in liquid culture, but cannot be compared between instruments without a standardized calibration protocol and is challenging to relate to actual cell count. We address this with an interlaboratory study comparing three simple, low-cost, and highly accessible OD calibration protocols across 244 laboratories, applied to eight strains of constitutive GFP-expressing E. coli. Based on our results, we recommend calibrating OD to estimated cell count using serial dilution of silica microspheres, which produces highly precise calibration (95.5% of residuals <1.2-fold), is easily assessed for quality control, also assesses instrument effective linear range, and can be combined with fluorescence calibration to obtain units of Molecules of Equivalent Fluorescein (MEFL) per cell, allowing direct comparison and data fusion with flow cytometry measurements: in our study, fluorescence per cell measurements showed only a 1.07-fold mean difference between plate reader and flow cytometry data.
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2.
  • Bravo, L, et al. (author)
  • 2021
  • swepub:Mat__t
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3.
  • Tabiri, S, et al. (author)
  • 2021
  • swepub:Mat__t
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4.
  • Edfors, Ove, et al. (author)
  • Massive MIMO for 5G: Theory, Implementation and Prototyping
  • 2016
  • In: Signal Processing for 5G: Algorithms and Implementations. - Chichester, UK : John Wiley & Sons, Ltd. - 1119116465 - 9781119116462 - 9781119116462 ; , s. 189-230
  • Book chapter (peer-reviewed)abstract
    • This chapter presents a flexible platform that supports prototyping up to 20 MHz bandwidth 128-antenna multiple input, multiple output (MIMO). It devotes theory, design, implementation, and prototyping of Massive MIMO for 5G communication systems. The chapter overviews the principles and theory of Massive MIMO. It describes the channel modeling system with a focus on specific phenomena of large scale 3D channels. The chapter discusses the practical implementation aspects of Massive MIMO systems including analog circuit imperfections and digital baseband processing. It describes the design and architecture of building an 128 antenna Massive MIMO testbed. The chapter presents the time synchronization and phase coherency aspects of a Massive MIMO base station. In general, the transmit signals should be chosen such that users receive their own symbols, with suppressed interference caused by the symbols intended for other users. Massive MIMO will play a crucial role in 5G systems as spectral and radiated power effciency become increasingly critical.
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  • Result 1-5 of 5

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