Direct digital construction: Technology-based operations management practice for continuous improvement of construction industry performance
Sign Up to like & getrecommendations! Published in 2019 at "Automation in Construction"
DOI: 10.1016/j.autcon.2019.102910
Abstract: Abstract Construction operations suffer from fragmented structures and loose coupling among project actors. Building on direct digital manufacturing (DDM), we describe direct digital construction (DDC) as a technology-based operations management practice aiming to improve construction… read more here.
Keywords: based operations; direct digital; technology based; construction ... See more keywords
Order acceptance and scheduling in direct digital manufacturing with additive manufacturing
Sign Up to like & getrecommendations! Published in 2019 at "IFAC-PapersOnLine"
DOI: 10.1016/j.ifacol.2019.11.328
Abstract: Abstract Additive manufacturing (AM), particularly powder bed fusion (PBF), technologies have been utilized as a direct digital manufacturing (DDM) approach in the production of parts for end users. It has been predicted that, in 2030,… read more here.
Keywords: direct digital; production; digital manufacturing; manufacturing ... See more keywords
Basic metrological properties of electronic oscillators with direct digital synthesis
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DOI: 10.1016/j.measurement.2016.12.009
Abstract: Signal oscillators based on DDS (Direct Digital Synthesis) are widely used in recent years. However, order metrological characteristics of signals generated by these oscillators have not been studied in many cases, and uses of such… read more here.
Keywords: total harmonic; direct digital; metrological characteristics; error ... See more keywords
A 2.2-GHz Configurable Direct Digital Frequency Synthesizer Based on LUT and Rotation
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Transactions on Circuits and Systems I: Regular Papers"
DOI: 10.1109/tcsi.2018.2872069
Abstract: This paper proposes a configurable direct digital frequency synthesizer (DDFS) based on the lookup-table (LUT)- rotation architecture. To break through the limitation of the single mode, the proposed DDFS is the first attempt which supports… read more here.
Keywords: frequency; digital frequency; rotation; configurable direct ... See more keywords
A 2-GHz Two-Tone Direct Digital Frequency Synthesizer
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Circuits and Systems II: Express Briefs"
DOI: 10.1109/tcsii.2022.3202903
Abstract: We present a 2-GHz 16-bit direct digital synthesizer (DDS) implemented and verified on a Xilinx Artix-7 FPGA, Nexys-4 DDR development board. The lookup-table based DDS is implemented with the help of multiplexers in a tree… read more here.
Keywords: two tone; frequency; synthesizer; ghz ... See more keywords
A Direct Digital Synthesizer of Complex Signals
Sign Up to like & getrecommendations! Published in 2018 at "Instruments and Experimental Techniques"
DOI: 10.1134/s0020441218050238
Abstract: The principles of the design and structural and circuitry-engineering solutions of direct digital synthesizers based on the method of the direct digital synthesis of frequencies and signals are proposed. The block and circuit diagrams of a… read more here.
Keywords: digital synthesizer; direct digital; frequency; complex signals ... See more keywords