Results 51 to 60 of about 2,290,689 (312)

A Hybrid Offline/Online Modeling Based Tracking Control for Complex Hydraulic Driving Processes

open access: yesIEEE Access, 2019
The hydraulic actuators are widely used in industry for the fabrication of all sorts of products. Due to the complexity and strong nonlinearity, such as the time-varying and nonlinear deformation force and driving force as well as the nonlinear friction,
Xinjiang Lu, Yunxu Bai, Bin Fan, Hao Sui
doaj   +1 more source

Modeling and Optimization of the Blade Structural Parameters for a Turbomolecular Pump

open access: yesMachines, 2023
The development of high-performance mass spectrometer and vacuum coating technology has placed higher demand on the vacuum level of turbomolecular pumps (TMPs), which are required to possess a greater compression ratio and faster pumping speed.
Zhi Chen   +3 more
doaj   +1 more source

Vibration tests on vidicons made by improved method [PDF]

open access: yes, 1966
Sensitive method is used for checking the performance of vidicons in mechanical vibration tests. The image of the desired fine-detail test pattern is stored in the photosensitive surface of the vidicon while the system is free of mechanical vibration ...

core   +1 more source

Selective Laser Sintering of Passive Dynamic Ankle-Foot Orthoses [PDF]

open access: yes, 2006
Passive dynamic ankle-foot orthoses (AFO’s) are used to improve gait performance in those with various neuromuscular disorders. An important design characteristic of passive dynamic AFOs is the storage and release of elastic energy within its structure
Crawford, Richard H.   +3 more
core   +1 more source

Investigation of Force-Controlled Polishing of Complex Curved PMMA Parts on a Machining Center

open access: yesMachines
During the polishing process of complex curved PMMA parts, the polishing force is an important factor affecting the surface quality and optical performance. In this paper, a force-controlled polishing device integrated into a machining center to maintain
Xiangran Meng   +5 more
doaj   +1 more source

Understanding the impact performance of injection moulded long fibre reinforced polyamide [PDF]

open access: yes, 2008
Short fibre reinforced thermoplastics have been used in the automotive industry for many years and there has recently been a strong growth in the use of polyamide based materials in under-the-hood applications.
Thomason, J.L.
core  

A Review on Mechanics and Mechanical Properties of 2D Materials - Graphene and Beyond [PDF]

open access: yes, 2016
Since the first successful synthesis of graphene just over a decade ago, a variety of two-dimensional (2D) materials (e.g., transition metal-dichalcogenides, hexagonal boron-nitride, etc.) have been discovered.
Akinwande, Deji   +19 more
core   +1 more source

NRASQ61R Expression in Lymphatic Endothelial Cells Causes Enlarged Vessels, Hemorrhagic Chylous Effusions, and High Mortality in a Mouse Model of Kaposiform Lymphangiomatosis

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Kaposiform lymphangiomatosis (KLA) is an aggressive complex lymphatic anomaly. Patients exhibit malformed lymphatic vessels and often develop hemorrhagic effusions and elevated angiopoietin‐2 (Ang‐2) levels. A somatic NRAS p.Q61R (NRASQ61R) mutation has been associated with KLA.
C. Griffin McDaniel   +3 more
wiley   +1 more source

Flexible head-following motion planning for scalable and bendable continuum robots

open access: yesBiomimetic Intelligence and Robotics
Continuum robots, which are characterized by high length-to-diameter ratios and flexible structures, show great potential for various applications in confined and irregular environments.
Te Li   +5 more
doaj   +1 more source

Robust Clustered Support Vector Machine With Applications to Modeling of Practical Processes

open access: yesIEEE Access, 2018
Real datasets are often distributed nonlinearly. Although many least squares support vector machine (LS-SVM) methods have successfully modeled this kind of data using a divide-and-conquer strategy, they are often ineffective when nonlinear data are ...
Xin-Jiang Lu   +3 more
doaj   +1 more source

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