Results 81 to 90 of about 206,674 (200)

Reversibility in plethysmographic airway and specific airway resistance in children

ERJ Open Research
Background Plethysmographic airway resistance (Raw) and specific airway resistance (sRaw) are widely used to assess baseline lung function and bronchodilator reversibility in children unable to perform spirometry. However, no consensus exists on cut-offs
Nicole Beydon, Cécile Du Boisbaudry, Christophe Delclaux, Rola Abou Taam, Iulia Ioan, Stefan Matecki, Jessica Taytard, Marie-Agnès Giroux-Metges, Muriel Le Bourgeois, Maxime Beydon, Plamen Bokov   +10 more
doaj   +1 more source

A prototype automatic phase compensation module [PDF]

The growing demands for high gain and accurate satellite communication systems will necessitate the utilization of large reflector systems. One area of concern of reflector based satellite communication is large scale surface deformations due to thermal ...
Terry, John D.
core   +1 more source

A Fourier Series-Neural Network Based Real-Time Compensation Approach for Geometric and Thermal Errors of CNC Milling Machines

Advances in Mechanical Engineering, 2013
In order to improve the accuracy and efficiency of the real-time error compensation, a Fourier Series-Neural Network (FS-NN) based compensation methodology is developed to reduce the thermally induced geometric errors of CNC milling machines under ...
Wei Wang, Yi Zhang, Kaiguo Fan, Jianguo Yang   +3 more
doaj   +1 more source

Feedback control of optical beam spatial profiles using thermal lensing

, 2013
A method for active control of the spatial profile of a laser beam using adaptive thermal lensing is described. A segmented electrical heater was used to generate thermal gradients across a transmissive optical element, resulting in a controllable ...
Arain, Muzammil A., Fulda, Paul, Liu, Zhanwei, Mueller, Guido, Reitze, David H., Tanner, David B., Williams, Luke   +6 more
core   +1 more source

Study on new thermal error compensation method for complex surface five-axis machining based on new experimental strategy

Advances in Mechanical Engineering
Five-axis machine tools are well-suited for processing complex surface parts. However, during the machining process, thermal error can have a significant impact on the machining accuracy.
Zheng Zou, Qingdong Zhou, Liang He, Zhengyuan Gao, Yong Yang, Jinghua Ma   +5 more
doaj   +1 more source

Thermal compensation strategy in selective electron beam melting: Tailoring the microstructure and mechanical properties of H13 tool steel

Materials & Design
H13 tool steel has extensive application in the mold manufacturing industry due to its excellent thermal strength and wear resistance. However, additively manufactured H13 exhibits inferior mechanical properties, high residual stress, and high volume ...
Jiaqi Deng, Gengjie Wang, Hongjun Qi, Yi Liu, Zhifu Huang   +4 more
doaj   +1 more source

Application of Machine Tool Thermal Error Compensation in Digital Twin-based System

Journal of Harbin University of Science and Technology
Thermal error significantly affects machining accuracy, demanding careful control. A robust system integrating a highly accurate thermal error model is the key to this control. This can be achieved through deep learning-based models.
MA Chi, LI Minging, LIU Jialan, HE Jialong, HUA Chunlei, WANG Liang   +5 more
doaj   +1 more source

Improved techniques for thermomechanical testing in support of deformation modeling [PDF]

The feasibility of generating precise thermomechanical deformation data to support constitutive model development was investigated. Here, the requirement is for experimental data that is free from anomalies caused by less than ideal equipment and ...
Castelli, Michael G., Ellis, John R.
core   +1 more source

Principles for numerical compensation of elastic deformations in computerized numerical control machine tools

Academia Engineering
Nowadays, precision methods for computerized numerical control (CNC) machine tools analyze geometric, kinematic, dynamic, and thermal errors separately.
Alexander P. Kuznetsov, Hans-Joachim Koriath   +1 more
doaj   +1 more source

Asbestos Trust Transparency [PDF]

, 2018
Originally and for many years, the primary defendants in asbestos cases were companies that mined asbestos or manufactured amphibole-containing thermal insulation.
Behrens, Mark A.
core   +1 more source