Results 21 to 30 of about 1,137,900 (287)

Resolving Mixed Algal Species in Hyperspectral Images

Sensors, 2013
We investigated a lab-based hyperspectral imaging system’s response from pure (single) and mixed (two) algal cultures containing known algae types and volumetric combinations to characterize the system’s performance.
Mehrube Mehrubeoglu, Ming Y. Teng, Paul V. Zimba   +2 more
doaj   +1 more source

ROI coding of volumetric medical images with application to visualisation [PDF]

, 2003
This paper presents region of interest (ROI) coding of volumetric medical images with the region itself being three dimensional. An extension to 3D-SPIHT which allows 3D ROI coding is proposed.
Agrafiotis, D, Canagarajah, CN, Bull, DR, N. Canagarajah, D. Agrafiotis, D.R. Bull   +5 more
core   +1 more source

Modeling method of CNC tooling volumetric error under consideration of Abbé error [PDF]

The International Journal of Advanced Manufacturing Technology, 2022
Abstract The Abbé error is a key factor for high-precision CNC machine tools. Unluckily, it is not taken into account in traditional machine tool volumetric error models. In this respect, based on the traditional machine tool volumetric error models, a new machine tool volumetric error model containing Abbé error is performed by ...
Guohua Chen, Lin Zhang, Xiangjie Wang, Chao Wang, Hua Xiang, Guangqing Tong, Dianzhang Zhao   +6 more
openaire   +1 more source

Colour volumetric compression for realistic view synthesis applications [PDF]

, 2011
Colour volumetric data, which is constructed from a set of multi-view images, is capable of providing realistic immersive experience. However it is not widely applicable due to its manifold increase in bandwidth.
Bull, David, Anantrasirichai, N, Redmill, DW, Canagarajah, CN, Akbari, Akbar Sheikh   +4 more
core   +1 more source

Patient-Specific Pre-Treatment VMAT Plan Verification Using Gamma Passing Rates

Atom Indonesia, 2023
Continuous gantry motion, continuous beam modulation, and variable dose rate are used in volumetric modulated arc therapy (VMAT) to obtain highly conformal radiation therapy dose distributions.
M. Z. Arsalan, M. B. Kakakhel, M. Shamshad, T. A. Afridi   +3 more
doaj   +1 more source

A Theoretical and Experimental Identification with Featured Structures for Crucial Position-Independent Geometric Errors in Ultra-Precision Machining

Machines, 2023
In ultra-precision machining (UPM), position-independent geometric errors (PIGEs), i.e., squareness errors, have a crucial impact upon the form accuracy of a machined surface.
Li Zhang, Shaojian Zhang
doaj   +1 more source

Comparison of Two Machine Learning Models for Predicting Volumetric Errors From On-The-Fly R-Test Type Device Data and Virtual End Point Constraints

Journal of Machine Engineering
On-the-fly virtual end-point constraints consists in moving all five axes of the machine tool while nominally maintaining the coincidence of a sensing head centre point with a master ball centre attached to the workpiece table.
Min Zeng, J. R. R. Mayer, Miao Feng, Elie Bitar-Nehme, Xuan Truong Duong   +4 more
doaj   +1 more source

Monitoring of mechanical errors and their dosimetric impact throughout the course of non-coplanar continuous volumetric-modulated arc therapy

Radiation Oncology, 2018
Background Volumetric-modulated Dynamic WaveArc therapy (VMDWAT) is a non-coplanar continuous volumetric modulated radiation therapy (VMAT) delivery technique.
Hideaki Hirashima, Mitsuhiro Nakamura, Yuki Miyabe, Megumi Uto, Kiyonao Nakamura, Takashi Mizowaki   +5 more
doaj   +1 more source

Multi-offset ground-penetrating radar imaging of a lab-scale infiltration test [PDF]

Hydrology and Earth System Sciences, 2012
A lab scale infiltration experiment was conducted in a sand tank to evaluate the use of time-lapse multi-offset ground-penetrating radar (GPR) data for monitoring dynamic hydrologic events in the vadose zone. Sets of 21 GPR traces at offsets between 0.44–
A. R. Mangel, S. M. J. Moysey, J. C. Ryan, J. A. Tarbutton   +3 more
doaj   +1 more source

Numerical modeling of ASR: an updated semi-empirical model

Revista IBRACON de Estruturas e Materiais, 2023
Alkali-silica reaction (ASR) is a deleterious expansion phenomenon affecting concrete structures worldwide. It occurs when a susceptible chemical composition of concrete components is present, and it is particularly rampant in inherently humid ...
Sandro Bezerra Torres, Sandro Marden Torres, André Jacomei Torii   +2 more
doaj   +1 more source