Results 111 to 120 of about 12,819,077 (325)

基于层片分割算法弧齿锥齿轮及准双面齿轮五轴数控切削仿真

open access: yesJixie chuandong, 2011
In order to solve the problems existing in geometric simulation of spiral bevel gear and hypoid gear cutting process,such as slow speed,low precision and lack of independence,slice algorithm is presented.The five axis numerical control simulation system ...
李敬财   +4 more
doaj  

Impact of electron-beam energy spread on the generation of high harmonics in seeded free-electron lasers

open access: yesPhysical Review Accelerators and Beams
In seeded free-electron lasers (FELs), harmonic up-conversion of an external seed laser can be used to generate coherent emission at short wavelengths.
Eléonore Roussel   +16 more
doaj   +1 more source

Network slicing deployment method based on isolation level

open access: yes网络与信息安全学报, 2020
In order to balance the performance isolation requirements and security isolation requirements of network slicing, a network slice deployment method based on isolation level was proposed.
PAN Qirun, HUANG Kaizhi, YOU Wei
doaj   +1 more source

Value of MRI Outcomes for Preventive and Early‐Stage Trials in Spinocerebellar Ataxias 1 and 3

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the value of MRI outcomes as endpoints for preventive and early‐stage trials of two polyglutamine spinocerebellar ataxias (SCAs). Methods A cohort of 100 participants (23 SCA1, 63 SCA3, median Scale for the Assessment and Rating of Ataxia (SARA) score = 5, 42% preataxic, and 14 gene‐negative controls) was scanned at 3T up ...
Thiago J. R. Rezende   +26 more
wiley   +1 more source

A Detailed Study of the Lobes of Eleven Powerful Radio Galaxies

open access: yes, 2009
Radio lobes of a sample of eleven very powerful classical double radio galaxies were studied. Each source was rotated so that the symmetry axis of the source was horizontal, and vertical cross-sectional cuts were taken across the source at intervals of ...
Alexander   +29 more
core   +1 more source

Structure–Function Decoupling of the Sensorimotor and Default Mode Networks in Black Americans With MS

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background and Objectives Multiple sclerosis (MS) exhibits racially disparate rates of disease progression. Black people with MS (B‐PwMS) experience a more severe disease course than non‐Hispanic White people with MS (NHW‐PwMS). Here we investigated structural and functional connectivity as well as structure–function decoupling in the ...
Emilio Cipriano   +11 more
wiley   +1 more source

Intrinsic emittance reduction of copper cathodes by laser wavelength tuning in an rf photoinjector

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2015
With the improvement of acceleration techniques, the intrinsic emittance of the cathode has a strong impact on the final brightness of a free electron laser.
Marta Csatari Divall   +6 more
doaj   +1 more source

Location‐Specific Hematoma Volume Predicts Early Neurological Deterioration in Supratentorial ICH

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Early neurological deterioration (END) adversely affects outcomes in patients with intracerebral hemorrhage (ICH). This study aimed to determine the location‐specific hematoma volumes for END in supratentorial ICH patients. Methods We retrospectively analyzed supratentorial ICH patients presenting from two prospective cohorts.
Zuoqiao Li   +10 more
wiley   +1 more source

Normal‐Appearing White Matter Injury Mediates Chronic Deep Venous Hypoxia and Disease Progression in Multiple Sclerosis

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore how cerebral hypoxia and Normal‐Appearing White Matter (NAWM) integrity affect MS lesion burden and clinical course. Methods Seventy‐nine MS patients, including 13 clinically isolated syndrome (CIS) patients and 66 relapsing–remitting multiple sclerosis (RRMS) patients, and 44 healthy controls (HCs) were recruited from ...
Xinli Wang   +8 more
wiley   +1 more source

Inter-slice leakage and intra-slice aliasing in simultaneous multi-slice echo-planar images

open access: yesBrain Structure and Function, 2018
Simultaneous multi-slice (SMS) imaging is a popular technique for increasing acquisition speed in echo-planar imaging (EPI) fMRI. However, SMS data are prone to motion sensitivity and slice leakage artefacts, which spread signal between simultaneously ...
C. McNabb   +5 more
semanticscholar   +1 more source

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