Results 61 to 70 of about 84,148 (213)

[News Clip: Roller Coaster]

, 1960
Video footage from the WBAP-TV television station in Fort Worth, Texas, to accompany a news story about the new roller coaster at the Forest Park in Fort Worth.
WBAP-TV (Television station : Fort Worth, Tex.)
core   +2 more sources

Influence of Key Parameter on Contact and Lubrication Performance of the Roller Enveloping Internal Engagement Worm Gear Transmission

Jixie chuandong, 2019
In order to analyze the influence of key parameters on the contact and lubrication performance of the inner meshing worm gear of the roller envelop， the mathematical model of the new worm drive is built.
Yuanhong Song, Xingqiao Deng, Yuanyuan Jiang, Jinge Wang   +3 more
doaj  

Research of the Special Processing Equipment Development and Trial Production of Roller Enveloping End Face Engagement Worm Pair

Jixie chuandong, 2020
According to the transmission principle and mathematical model of the roller envelope end face meshing worm drive， the conjugate relationship of the roller envelope end face meshing worm is analyzed， and the design scheme of the roller envelope end face ...
Kai Wang
doaj  

Roller element bearing fault detection and diagnosis based on an optimised envelope analysis [PDF]

, 2013
The rolling element bearing is a key part in many mechanical facilities and the diagnosis of its faults is\ud very important in the field of machinery health monitoring for safe and efficient operations. Currently,\ud envelope analysis is widely used to obtain the bearing defect harmonics from the envelope signal\ud spectrum for the detection and ...
Rehab, Ibrahim, Tian, Xiange, Gu, Fengshou, Ball, Andrew   +3 more
openaire  

Thermochronologic Constraints on the Extensional History of the Ibex Hills, Southeastern Black Mountains, Death Valley, California

Geological Journal, EarlyView.
A. Modeled T‐t paths for samples in the northern Ibex Hills, showing steady cooling throughout much of the Cenozoic, until rapid Miocene cooling. B. Weighted mean paths for each sample in this study. Note that all show a rapid cooling event at or just after 10 Ma, which is interpreted to represent exhumation as a result of regional extenstion ...
Zachariah D. Fleming
wiley   +1 more source

Impact of toothbrush type and periodontal phenotype on root coverage stability: A 6‐year observational follow‐up of a randomized clinical trial

Journal of Periodontology, EarlyView.
Abstract Background This 6‐year observational follow‐up of a randomized, parallel‐arm clinical trial evaluated the association between toothbrush type and periodontal phenotype on the long‐term stability of the gingival margin (GM) following coronally advanced flap (CAF) surgery.
Raffaele Acunzo, Enrico Limiroli, Silvia Ricoboni, Giorgia Saracino, Giulio Rasperini   +4 more
wiley   +1 more source

Meshing Analysis of Non-parallel Double-roller Enveloping Hourglass Worm Gearing

工程科学与技术, 2012
:To eliminate the backlash and improve the precision and efficiency of enveloping worm, by analyzing the shortcomings in the existing non-backlash worm gear sets,non-parallel double-roller enveloping hourglass worm gearing was proposed based on the ...
doaj  

Influence of Worm-wheel Rotational Deflection on Meshing Performance of the Cylindrical Roller Enveloping Internal Engagement Worm Gear

Jixie chuandong, 2018
The cylindrical roller enveloping end-face internal engagement worm gear with the worm-wheel rotational deflection is a novel transmission that can achieve multi-load and different corner angular outputs.
Song Yuanhong, Deng Xingqiao, Jiang Yuanyuan   +2 more
doaj  

Ultra‐High Frequency Ultrasound Imaging and Quantification of Microvascular Flow in Xenograft Renal Cell Carcinoma in an Avian Chorioallantoic Membrane Model

Journal of Ultrasound in Medicine, EarlyView.
Patient‐derived xenograft (PDX) tumor models initiated in avian chorioallantoic membranes (CAM) are under investigation to evaluate the effectiveness of therapeutic options with the objective of personalizing treatments. CAM PDXs paired with ultra‐high frequency ultrasound (UHFUS) imaging could potentially constitute prospective high throughput assays ...
Sara Mar, Emmanuel Chérin, Justin Xu, David E. Goertz, Hon S. Leong, Christine E.M. Demore   +5 more
wiley   +1 more source

Dynamic Performance Enhancement of a High‐Agility Hypersonic Mechanical System via a Learning‐Augmented Robust Control Architecture

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT The design of control systems for high‐agility mechanical systems operating in extreme environments is a significant challenge in nonlinear dynamics. This paper addresses the complex dynamic control problem of a hypersonic interceptor, modeled as a multi‐input multi‐output (MIMO) mechanical system characterized by strong aerodynamic cross ...
Mohammad Mahdi Soori, Seyed Hossein Sadati   +1 more
wiley   +1 more source