Results 71 to 80 of about 334,043 (330)

Research of the Transfer Method of Four-dimensional Coordinate to Three-dimensional Coordinate

open access: yesJixie chuandong, 2016
The coordinate measure machine(CMM) with rotary table is often use in the field of precision measurement.Because of the error evaluation requires that all measured point must be expressed in the same coordinate system,but the workpiece coordinate system ...
Ran Xiaoyan, Zhang Bai
doaj  

Magnetic cubes-collocated coils as sensors for displacement positioning [PDF]

open access: yesTehnika, 2015
We describe design and verification of a novel autonomous sensor system (Magnetic Cubes) for evaluating the distance between two points as well as the rotation matrix between the coordinate systems attached to the sensors.
Jovičić Nenad S.   +4 more
doaj   +1 more source

Surface Elasticity Based Nonlocal Vibration Analysis of Bidirectional Functionally Graded Tapered Nanobeam

open access: yesAdvanced Theory and Simulations, EarlyView.
This work proposes a surface elasticity‐based nonlocal model for analyzing the vibrations of bi‐directionally graded tapered nanobeam. The results demonstrate that, in absence of surface effect, the increasing value of tapered parameter leads to stiffness‐hardening of the nanobeam. However, the consideration of surface effect changes this trend and the
Chinika Dangi, Susmita Naskar
wiley   +1 more source

Guesstimation of Molecular Ensemble Electrostatics Properties Through SCERPA‐DFT Calculation: Molecular Field‐Coupled Nanocomputing as a Case Study

open access: yesAdvanced Theory and Simulations, EarlyView.
This work presents a framework combining the Self‐Consistent Electrostatic Potential Algorithm (SCERPA) and Density‐Functional Theory calculations to efficiently evaluate the electronic properties of molecular ensembles. The approach achieves ab initio‐comparable precision while significantly reducing computation time and provides the first DFT ...
Yuri Ardesi   +4 more
wiley   +1 more source

Non‐Invasive Diagnosis of Chronic Myocardial Infarction via Composite In‐Silico‐Human Data Learning

open access: yesAdvanced Science, EarlyView.
This study presents a non‐invasive machine learning model to identify infarct regions in the left ventricle using cardiac strain data. By combining rodent‐based simulated data with limited human data, the model achieves high accuracy in predicting infarct size and location without the need for gadolinium contrast agents, offering a promising ...
Rana Raza Mehdi   +7 more
wiley   +1 more source

阿基米德螺旋面异常数据的剔除方法

open access: yesJixie chuandong, 2010
A method of removing abnormal data is presented.It is used for lots of data on Archimedes surfaces measured by CMM.The data from cartesian-coordinate system is transformed into cylindrical coordinate system at first.Then the Archimedes surface is ...
邹红玲   +4 more
doaj  

Physics students’ construction of differential length vectors in an unconventional spherical coordinate system

open access: yesPhysical Review Physics Education Research, 2019
Vector calculus and multivariable coordinate systems play a large role in the understanding and calculation of much of the physics in upper-division electricity and magnetism. Differential vector elements represent one key mathematical piece of students’
Benjamin P. Schermerhorn   +1 more
doaj   +1 more source

Split‐Aperture Xolography – Linear Volumetric Photoactivation with Short Axial Dimension and Low out of Focus Excitation

open access: yesAdvanced Science, EarlyView.
Stepwise excitation of dual‐color responsive molecules in a novel intersecting half‐cone geometry provides excellent spatial resolution while retaining the high efficiency and thus speed of the overall process. The approach provides volumetric methods with an enhanced performance at the nanoscale.
Martin Regehly, Stefan Hecht
wiley   +1 more source

Resonant Spin Amplification and Accumulation in MAPbI3 Single Crystals

open access: yesAdvanced Science, EarlyView.
Carrier spin dynamics are studied in a 20 µm thin MAPbI3 perovskite single crystal using time‐resolved Kerr ellipticity at cryogenic temperatures. Long spin relaxation (30 ns) and dephasing (21 ns) enable spin accumulation. Spin accumulation effects are discussed in detail along with carrier‐nuclear spin interactions.
Erik Kirstein   +6 more
wiley   +1 more source

Hollow Cholesteric Liquid Crystal Elastomer Fiber with Synergistically Enhanced Resilience and Mechanochromic Sensitivity

open access: yesAdvanced Science, EarlyView.
It describes hollow cholesteric liquid crystal elastomer fiber with radial helix prepared by solvent evaporation‐induced assembly and template assistance. The fiber show mechanochromic wavelength blueshift of 2.25 nm·%−1 under low strain. Excellent mechanochromic reversibility and resilience are devoted by cross‐linking in the wall layer.
Wenwen Wang   +8 more
wiley   +1 more source

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