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- Zhang, Dai, et al.
(författare)
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Analysis and Calibration of Nonbinary-Weighted Capacitive DAC for High-Resolution SAR ADCs
- 2014
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Ingår i: IEEE Transactions on Circuits and Systems - II - Express Briefs. - : IEEE. - 1549-7747 .- 1558-3791. ; 61:9, s. 666-670
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Tidskriftsartikel (refereegranskat)abstract
- This brief analyzes the effect of capacitor variation on the design of high-resolution nonbinary-weighted successive-approximation-register analog-to-digital converters in terms of radix, conversion steps, and accuracy. Moreover, the limitation caused by the one-side redundancy of the nonbinary-weighted network is addressed and a corresponding solution with a mathematical derivation is provided. In order to relax the mismatch requirement on the capacitor sizing while still ensuring enough linearity, a bottom-up weight calibration technique accounting for noise and offset errors is proposed, and its effectiveness is demonstrated. This calibration approach can be easily incorporated into a charge-redistribution converter without modifying its main architecture and conversion sequence.
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- LI, Chao, et al.
(författare)
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Changes in composition, cellulose degradability and biochemical methane potential of Miscanthus species during the growing season
- 2017
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Ingår i: Bioresource Technology. - : Elsevier BV. - 0960-8524. ; 235, s. 389-395
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Tidskriftsartikel (refereegranskat)abstract
- The composition, cellulose degradability and biochemical methane potential (BMP) of M. sinensis, M. floridulus, Miscanthus × giganteus and M. lutarioriparius were investigated concomitantly at different growth/harvest times during their growing season. For all the four species, there was only a slight change in the compositional content. Meanwhile there was a huge change in the BMP values. At the growth time of 60 days the BMPs ranged from 247.1 to 266.5 ml g−1 VS. As growth time was prolonged, the BMPs decreased by 11–35%. For each species, the BMP was positively correlated to the cellulose degradability with the correlation coefficients (R2) ranging from 0.8055 to 0.9925. This suggests that besides the biomass yield, it is justifiable to consider cellulose degradability when selecting the suitable harvest time for biofuels production from Miscanthus, especially in tropical and subtropical regions where Miscanthus can be harvested twice or more within a year.
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4. |
- Green, Jenny, et al.
(författare)
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Formative mathematics assessment in upper secondary school
- 2014
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Ingår i: Proceedings of the 38<sup> th</sup> Conference of the International Group for the Psychology of Mathematics Education in Vancouver, Canada 2014. ; , s. 312-312
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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