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"Roller"
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Samantha on a roll
Warned not to try out her new skates, Sammy straps them on anyway, resulting in a wild ride through town.
Book
Thе imрасt of the disс roller's diаmeter on the сombined mасhine's рerformаnсe during the sequentiаl рroсessing of freshlу рlаntеd sоil
When рlаnting fields free of wheаt or soуbeаns in the рubliс сonditions, the toр lауer of soil сontаining рlаnt residues аnd weeds is turned over аnd thrown into the bottom lауer, сreаting numerous gарs аnd irregulаrities in the рlаnted field. Thus, when рreраring freshlу рloughed fields for рlаnting, the soil раrtiсles left behind bу the рloughed bodies ought to be сomрасted, сomрасted, аnd leveled. Bаsed on the аforementioned, the Indiаn Institutes of Аgriсulture аnd Аgriсulturаl Teсhnologу аnd the Indiаn Institute of Meсhаniсаl Engineering hаve develoрed аn industriаl version of the сombined mасhinerу used in the рreраrаtion of new аrаble lаnd for рlаnting. The аrtiсle desсribes the imрасt of the diаmeter of these сombined mасhine disseсtion rollers on the deviсe's рerformаnсe аnd indiсаtes thаt the diаmeter of the сombined mасhine rollers should be between 415 аnd 490 mm to ensure quаlitу рroсessing аt the neсessаrу level with low energу сonsumрtion on аvаilаble lаnd.
Journal Article
Roller derby rivals
It's 1948 in New York City. A legendary high-speed, hard-hitting rivalry on the Roller Derby track is about to be witnessed by a packed arena at the 69th Regiment Armory and for the first time, thousands of television viewers. Here is the story of Gerry Murray and Midge Toughie Brasuhn, two pioneering athletes at the dawn of televised sports.
Book
A rolling bearing fault diagnosis method based on AES-SD improved CYCBD
A bearing fault diagnosis method via analytical energy spectral density of symmetric difference (AES-SD) enhanced maximum second-order cyclostationarity blind deconvolution (CYCBD) is proposed. AES-SD identifies the cyclic frequency; an impulse-to-noise separation index selects the filter length; CYCBD then deconvolves the signal with optimized parameters. Simulations and experiments validate superior weak-impulse extraction under strong noise without prior knowledge, outperforming MED and MCKD.
Journal Article
Research on rolling bearing fault diagnosis based on EEMD and RF
Rolling bearings play a vital role in mechanical equipment, and their proper functioning is directly related to the safety of the equipment. Therefore, accurately diagnosing bearing faults is crucial to the smooth functioning of mechanical equipment. This research proposes a method composed of Ensemble Empirical Mode Decomposition (EEMD) and Random Forest (RF) for fault identification. Initially, using EEMD to decompose the original signal into multiple Intrinsic Mode Functions (IMFs). Then, their energy is calculated and normalized, and the normalized energy corresponding to the effective IMFs is selected as features. Finally, classification is performed through RF. The identification of seven bearing conditions is conducted based on experimental data and compared with other different methods. The results demonstrate that the proposed approach outperforms the other methods in identifying bearing fault types, achieving the highest accuracy of 97.6%.
Journal Article
Make a roller coaster
\"Discusses the science behind roller coasters and includes instructions for readers to build their own from household materials.\"-- Provided by publisher.
Book
An experiment-assisted frictional power loss model for double-row tapered roller bearing considering roller skewing and tilting
Accurate prediction of frictional power loss in bearings is essential for optimizing anti-friction designs and ensuring operational reliability. However, bearing frictional mechanisms under abnormal conditions remain insufficiently explored due to the neglect of irregular roller postures such as skewing and tilting. This study develops a comprehensive power loss model of double-row tapered roller bearings (DTRBs) that explicitly quantifies the effects of roller postures on total and local power loss. The roller motions, which serve as critical inputs of the proposed model, were measured by applying eccentric loads to the DTRB. Systematic testing evaluated the effects of eccentric displacement, radial load, axial load, and rotational speed on power dissipation. Furthermore, the effects of roller postures on power dissipation were decoupled from the total amount, and a sensitivity analysis was conducted. Results indicate that these postures contribute approximately 11% to 21% of total power loss as eccentric displacement ranges from 0 to 40 mm, with tilting generating almost 2.5 times greater heat than skewing. The increasing sensitivity further confirms that the two roller postures play an indispensable role in total frictional power loss.
Journal Article
You must be this tall
\"The story of two friends, Frank and Harold, who do everything together and want to ride a roller coaster. But one of them is not tall enough. What are these friends to do?\"-- Provided by publisher.
Book
Study on Dynamic Coupling Simulation of Intelligent Monitoring System for Subgrade Rolling Compaction
Through research on the mechanism of vibration compaction, a “Roller-Subgrade” coupling system model for roadbed vibration compaction construction was established, and dynamic analysis and calculations were performed on this model. Meanwhile, the MATLAB software was utilized to conduct simulation studies on this coupling model, with detailed elaboration on the determination of basic simulation parameters and the design of corresponding simulation programs. Through simulation analysis, the displacement and velocity response of the vibratory wheel of the vibratory roller under fixed mechanical and soil parameters were explored.
Journal Article