Results 31 to 40 of about 38,212 (190)

Research on Roundness Error Evaluation of Connecting Rod Journal in Crankshaft Journal Synchronous Measurement

open access: yesApplied Sciences, 2022
The crankshaft is the core part of an automobile engine, and the accuracy requirements of various shape and position errors are very high. On the basis of a synchronous measurement system, the connecting rod journal is deeply studied, including data ...
Tingting Gu, Xiaoming Qian, Peihuang Lou
doaj   +1 more source

A Homology Theory for Etale Groupoids [PDF]

open access: yes, 1998
Etale groupoids arise naturally as models for leaf spaces of foliations, for orbifolds, and for orbit spaces of discrete group actions. In this paper we introduce a sheaf homology theory for etale groupoids.
Crainic, Marius, Moerdijk, Ieke
core   +4 more sources

Lower Bounds on the Bounded Coefficient Complexity of Bilinear Maps [PDF]

open access: yes, 2002
We prove lower bounds of order $n\log n$ for both the problem to multiply polynomials of degree $n$, and to divide polynomials with remainder, in the model of bounded coefficient arithmetic circuits over the complex numbers.
Buergisser, Peter, Lotz, Martin
core   +3 more sources

Warped Convolutions, Rieffel Deformations and the Construction of Quantum Field Theories [PDF]

open access: yes, 2010
Warped convolutions of operators were recently introduced in the algebraic framework of quantum physics as a new constructive tool. It is shown here that these convolutions provide isometric representations of Rieffel's strict deformations of C ...
B. Schroer   +29 more
core   +2 more sources

Chinese Named Entity Recognition Based on Dilated Gated Convolution Feature Fusion [PDF]

open access: yesJisuanji gongcheng, 2023
In the task of Chinese Named Entity Recognition(NER), the long short-term memory network model with cyclic structure can solve the problem of long-distance dependence by capturing temporal features, but its feature capture method is singular and the ...
Changpei YANG, Liefa LIAO
doaj   +1 more source

FFT Interpolation from Nonuniform Samples Lying in a Regular Grid [PDF]

open access: yes, 2014
This paper presents a method to interpolate a periodic band-limited signal from its samples lying at nonuniform positions in a regular grid, which is based on the FFT and has the same complexity order as this last algorithm. This kind of interpolation is
Selva, J.
core   +3 more sources

Intelligent Grazing UAV Based on Airborne Depth Reasoning

open access: yesRemote Sensing, 2022
The existing precision grazing technology helps to improve the utilization rate of livestock to pasture, but it is still at the level of “collectivization” and cannot provide more accurate grazing management and control.
Wei Luo   +14 more
doaj   +1 more source

Algebraic decoding for doubly cyclic convolutional codes

open access: yesAdvances in Mathematics of Communications, 2010
16 ...
Gluesing-Luerssen, H.   +2 more
openaire   +2 more sources

Cup Products in Hopf-Cyclic Cohomology [PDF]

open access: yes, 2004
We construct cup products of two different kinds for Hopf-cyclic cohomology. When the Hopf algebra reduces to the ground field our first cup product reduces to Connes' cup product in ordinary cyclic cohomology.
Khalkhali, Masoud, Rangipour, Bahram
core   +4 more sources

Rethinking interactive networks and regression loss functions for industrial defect detection

open access: yesJournal of King Saud University: Computer and Information Sciences, 2023
Defect detection of industrial products is crucial to ensure product quality and use safety. However, the following difficulties still exist complex defect background, the large similarity between defect classes and weak semantic information, and ...
Zhanzhi Su   +7 more
doaj   +1 more source

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