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An analysis of the accuracy of COVID-19 country transmission classification

Scientific Reports, 2022
Accurate epidemiological classification guidelines are essential to ensure implementation of adequate public health and social measures. Here, we investigate two frameworks, published in March 2020 and November 2020 by the World Health Organization (WHO)
I. Deza-Cruz, J. M. Prada, V. Del Rio Vilas   +2 more
doaj   +3 more sources

Analysis on Dynamic Transmission Accuracy for RV Reducer [PDF]

MATEC Web of Conferences, 2017
By taking rotate vector (RV) reducer as the research object, the factors affecting the transmission accuracy are studied, including the machining errors of the main parts, assembly errors, clearance, micro-displacement, gear mesh stiffness and damping ...
Zhang Fengshou, Li Pengfei, Zhu Peng, Yang Xingxing, Jiang Wenhe   +4 more
doaj   +2 more sources

The Effect of Cycloid Gear Wear on the Transmission Accuracy of the RV Reducer

Machines
The cycloid gear wear of RV reducers leads to the degradation of the industrial robots’ transmission accuracy, but the degradation law with respect to the wear volume is still unclear.
Yourui Tao, Huishan Liu, Miaojie Wu, Nanxian Zheng, Jiaxing Pei   +4 more
doaj   +3 more sources

Accuracy Analysis of Complex Transmission System with Distributed Tooth Profile Errors

Machines
Tooth profile errors are the internal excitations that cause gear meshing errors, which are critical error factors affecting gear transmission accuracy. In existing studies, it is usually regarded as a constant or random distribution function.
Min Zhang, Zhijing Zhang, Jian Xiong, Xiao Chen   +3 more
doaj   +3 more sources

Reliability of Dynamic Kinematic Accuracy for Gear Transmission

Jixie chuandong, 2019
Gears are important components of mechanical products and its motion accuracy directly affects the quality and reliability of machinery. The influence factors of gear transmission accuracy include gear manufacturing， assembly errors and external loads ...
Peng Xiao Tiyi Liu Tao Zhang Junfu Peng
doaj   +1 more source

TRANSMISSION ACCURACY OF SYNCHRONOUS BELT BASED ON RECURDYN

Jixie qiangdu, 2017
Using the mechanism of the tooth climbing of the belt,the mathematical model of the transmission error is established,reveals the transmission error of the synchronous belt is a function of the pulley pitch angle.Establish the virtual prototype dynamic ...
GUO JianHua, MENG QingXin, YU Xin, HU QingMing   +3 more
doaj   +1 more source

Enhanced method for assessing designed sag accuracy in overhead transmission electric lines using field data and statistical analysis

International Journal of Electrical Power & Energy Systems
This study evaluates the accuracy of executed sags in overhead transmission electric lines, explicitly focusing on AAAC Al 59 type wire. A novel and innovative approach involves collecting data on sags in the field, converting field data into design data,
Alexander Nudler, Roi Yozevitch, Eldad Holdengreber   +2 more
doaj   +3 more sources

Degradation Law Analysis and Life Estimation of Transmission Accuracy of RV Reducer Based on Tooth Surface and Bearing Wear

Lubricants
As a core component of industrial robots, the transmission accuracy life (TAL) of rotary vector (RV) reducers constitutes a primary factor determining the high-precision operation of robotic systems.
Chang Liu, Wankai Shi, He Yu, Kun Liu
doaj   +3 more sources

Effects Of Battery Levels And Transmission Distances On Scanning Accuracy

International Dental Journal
Aim or purpose: This study aimed to explore the effects of battery levels and transmission distances on the accuracy and scan time of wireless intraoral scanners during complete-arch scans.
Yongqing Guo, Kaijin Lin
doaj   +2 more sources

An Accuracy Prediction Method of the RV Reducer to Be Assembled Considering Dendritic Weighting Function

Energies, 2022
There are many factors affecting the assembly quality of rotate vector reducer, and the assembly quality is unstable. Matching is an assembly method that can obtain high-precision products or avoid a large number of secondary rejects.
Shousong Jin, Yanxi Chen, Yiping Shao, Yaliang Wang   +3 more
doaj   +1 more source