Results 21 to 30 of about 327,042 (281)

Modeling and Verification of Error Propagation in Integrated Additive/Subtractive Multi-Directional Direct Manufacturing [PDF]

open access: yes, 2006
Integrated additive-subtractive manufacturing, when applied in the framework of SolidFreeform-Fabrication (SFF) allows the fabrication of functional parts on single platform, directly from its computer model.
Dwivedi, Rajeev   +2 more
core   +1 more source

Feasibility analysis of “regional pre-pumping and pressure relief and anti-impact” of directional long borehole in Tingnan Coal Mine working face

open access: yesMeikuang Anquan, 2022
In view of the common use before mining at 402 face in Tingnan Coal Mine, there are some problems in the process of pressure relief drilling, such as high drilling cost, long construction period, drilling deviation, which will cause air leakage in the ...
SHEN Jianting, WANG Fei, HUANG He
doaj   +1 more source

Compact silicon photonics circuit to extract multiple parameters for process control monitoring [PDF]

open access: yes, 2020
We present a compact interferometer circuit to extract multiple model parameters of on-chip waveguides and directional couplers from optical measurements.
Bogaerts, Wim   +5 more
core   +2 more sources

Preparation of Twinned Dendrites of Al-Zn Alloy with High Zn Content [PDF]

open access: yesArchives of Metallurgy and Materials, 2018
Twinned dendrites in Al-Zn alloy with high Zn content (40% wt.%) were successfully prepared by directional solidification. At different directional solidification rates (1000 and 1500 μm/s), microstructures and growth orientation variations of Al twinned
K. Gao   +5 more
doaj   +1 more source

Recurrence of biased quantum walks on a line

open access: yes, 2009
The Polya number of a classical random walk on a regular lattice is known to depend solely on the dimension of the lattice. For one and two dimensions it equals one, meaning unit probability to return to the origin.
Aharonov D Ambainis A Kempe J Vazirani U   +18 more
core   +1 more source

Two-Way Optical Frequency Comparisons Over 100km Telecommunication Network Fibers [PDF]

open access: yes, 2014
By using two-way frequency transfer, we demonstrate ultra-high resolution comparison of optical frequencies over a telecommunication fiber link of 100 km operating simultaneously digital data transfer.
Amy-Klein, Anne   +5 more
core   +2 more sources

Directional DBS Leads Show Large Deviations from their Intended Implantation Orientation [PDF]

open access: yesParkinsonism & Related Disorders, 2019
AbstractObjectiveLead orientation is a new degree of freedom with directional deep brain stimulation (DBS) leads. We investigated how prevalent deviations from the intended implantation direction are in a large patient cohort.MethodsThe Directional Orientation Detection (DiODe) algorithm to determine lead orientation from postoperative CT scans was ...
T.A. Dembek   +10 more
openaire   +2 more sources

Research and application of near-horizontal directional coring technology and supporting drilling tools

open access: yesMeikuang Anquan
In order to solve the technical problems of accurate and fine geological exploration of mines and preliminary exploration of infrastructure projects, based on the deflection mechanism of rope coring straightening drilling trajectory, a combination of ...
Zujie ZOU
doaj   +1 more source

Directional Tuning Curves, Elementary Movement Detectors, and the Estimation of the Direction of Visual Movement [PDF]

open access: yes, 1990
Both the insect brain and the vertebrate retina detect visual movement with neurons having broad, cosine-shaped directional tuning curves oriented in either of two perpendicular directions.
Hateren, J.H. van,
core   +3 more sources

2-(4-Chloroanilino)-1-(4-chlorophenyl)ethanone

open access: yesActa Crystallographica Section E, 2011
In the title compound, C14H11Cl2NO, the benzene rings form a dihedral angle of 3.14 (6)°. Overall, the molecule is close to being planar (r.m.s. deviation for all the non-H atoms = 0.054 Å).
Hoong-Kun Fun   +4 more
doaj   +1 more source

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