Results 51 to 60 of about 239,194 (337)
Environmental memory from a circadian oscillator:the Arabidopsis thaliana clock differentially integrates perception of photic vs. thermal entrainment [PDF]
, 2011 The constraint of a rotating earth has led to the evolution of a circadian clock that drives anticipation of future environmental changes. During this daily rotation, the circadian clock of Arabidopsis thaliana (Arabidopsis) intersects with the diurnal ...
Amanda M. Davis +8 more
core +1 more source
Correlation Stability Problem in Selecting Temperature-Sensitive Points of CNC Machine Tools
Machines, 2022 In the thermal-error compensation of CNC machine tools, temperature-sensitive points (TSPs) are used for predicting thermal error and need to have a high correlation with the thermal error.
Hui Liu +4 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.This study investigates laser metal deposition of aluminum alloys EN AW‐7075 and EN AW‐5083, using powder blending to compensate zinc and magnesium evaporation. In situ alloying and ex situ alloying with ZnAl12 and AZ91 preserve near‐standard compositions and improve mechanical properties.
Finn Bendixen +3 more
wiley +1 more source
Non-Uniform Offsetting and its Applications in Laser Path Planning of Sterolithography Machine [PDF]
, 2007 Laser path planning is an important step in solid freeform fabrication processes such as Stereolithography (SLA). An important consideration in the laser path planning is to compensate the shape of laser beam. Currently the compensation is divided into
Chen, Yong
core +1 more source
MechanicsAccording to the literature analysis, the thermal error of CNC machine tools is the main factor affecting its processing accuracy, accounting for about 40% -70% ; This paper discusses the structure assembly of Aspherical Grinder, which is the research carrier of thermal error analysis of NC machine tool, and analyzes the characteristics and concrete ...
Bo YU, Xiao-peng CHANG, Lei YU
openaire +1 more source
Advanced Engineering Materials, EarlyView.The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan +4 more
wiley +1 more source
Measurement + Control, 2023 Temperature variation is an important factor affecting the performance of Quartz flexible accelerometer (QFA). Performance deterioration of QFA degrades the navigation accuracy of inertial navigation system (INS).
Xin Wang +4 more
doaj +1 more source
Research into Image Point Positioning Compensation of a High-Orbit Thermal Infrared Staring Camera
Applied Sciences, 2023 The sight of the high-orbit thermal infrared staring camera is concentrated and sensitive to temperature changes, and therefore its image point positioning is key to ensuring the geometric quality of the thermal infrared staring image and eliminating the
Hui Xiao +7 more
doaj +1 more source
A particle swarm optimisation-based Grey prediction model for thermal error compensation on CNC machine tools [PDF]
, 2015 Thermal errors can have a significant effect on CNC machine tool accuracy. The thermal error compensation system has become a cost-effective method of improving machine tool accuracy in recent years.
Abdulshahed, Ali +2 more
core
Active and intelligent control onto thermal behaviors of a motorized spindle unit [PDF]
, 2018 Motorized spindle unit is the core component of a precision CNC machine tool. Its thermal errors perform generally serious disturbance onto the accuracy and accuracy stability of precision machining.
Chang, Wenfen +6 more
core +1 more source