Online compensation of force-induced deformation for high-precision riveting machine based on force–displacement data analysis

2017 ◽  
Vol 94 (1-4) ◽  
pp. 941-956 ◽  
Author(s):  
Yilian Zhang ◽  
Qingzhen Bi ◽  
Long Yu ◽  
Yuhan Wang
Keyword(s):  
Data Analysis ◽  
High Precision ◽  
Force Displacement

scholarly journals Data Analysis and Calibration of Radiocarbon Dating Results from the Cemetery of the Marquises of Jin

Radiocarbon ◽  
2001 ◽  
Vol 43 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Xiangyang Lu ◽  
Zhiyu Guo ◽  
Hongji Ma ◽  
Sixun Yuan ◽  
Xiaohong Wu
Keyword(s):  
Data Analysis ◽  
High Precision ◽  
Radiocarbon Dating ◽  
Careful Analysis ◽  
Historical Record ◽  
Calibration Result ◽  
Special Part ◽  
Peking University ◽  
Very High ◽  
Good Agreement

The chronology study of the cemetery of Marquises of Jin is valuable to improving the chronological table of Marquis of Jin family. It is also helpful for improving the chronological table of the Zhou Dynasty. The samples were measured at Peking University (PKUAMS). We also made an interlaboratory check with Isotrace to ensure the accuracy. By careful analysis of archaeological information, we built different models and calibrated by OxCal. The calibration results, both sampling contexts and estimations, are in very good agreement with the historical record. Because the dates of some events correspond to the special part of the curve, the calibration gets very high precision. The calibration result of tomb M93 suggests that its host is Marquis Shangshu instead of Marquis Wen.

scholarly journals Method of Studying Modulation Effects of Wind and Swell Waves on Tidal and Seiche Oscillations

2021 ◽  
Vol 9 (9) ◽  
pp. 926
Author(s):  
Grigory Ivanovich Dolgikh ◽  
Sergey Sergeevich Budrin
Keyword(s):  
Experimental Data ◽  
Regression Analysis ◽  
Data Analysis ◽  
High Precision ◽  
Wind Waves ◽  
Laser Interference ◽  
Wave Processes ◽  
Interaction Of Waves ◽  
Seiche Oscillations ◽  
Lower Frequencies

This paper describes a method for identifying modulation effects caused by the interaction of waves with different frequencies based on regression analysis. We present examples of its application on experimental data obtained using high-precision laser interference instruments. Using this method, we illustrate and describe the nonlinearity of the change in the period of wind waves that are associated with wave processes of lower frequencies—12- and 24-h tides and seiches. Based on data analysis, we present several basic types of modulation that are characteristic of the interaction of wind and swell waves on seiche oscillations, with the help of which we can explain some peculiarities of change in the process spectrum of these waves.

VEDA: VERA data analysis software for VLBI phase-referencing astrometry

2020 ◽  
Vol 72 (4) ◽  
Author(s):  
Takumi Nagayama ◽  
Tomoya Hirota ◽  
Mareki Honma ◽  
Tomoharu Kurayama ◽  
Yuuki Adachi ◽  
...  
Keyword(s):  
Data Analysis ◽  
High Precision ◽  
Very Long Baseline Interferometry ◽  
Phase Fluctuation ◽  
Structural Effect ◽  
Analysis Software ◽  
Long Baseline ◽  
Vlbi Data ◽  
Motion Measurements ◽  
Maser Sources

Abstract We present the VEra Data Analyzer (VEDA) software package for Very Long Baseline Interferometry (VLBI) phase-referencing observations and parallax measurements. The Japanese VLBI project VLBI Exploration of Radio Astrometry (VERA) provides high-precision astrometric results at the 10 μas level. To achieve this precision, accurate calibration of the atmospheric phase fluctuation, the instrumental phase, and the source structural effect is required. VEDA specializes in phase-referencing data analysis, including these calibrations. In order to demonstrate its performance we analyzed H2O maser observations of W 3(OH) and Orion KL with VERA. Their parallaxes were obtained to be 0.527 ± 0.016 mas and 2.459 ± 0.029 mas, respectively. We also analyzed their data using AIPS, which is widely used for VLBI data analysis, and confirmed that the parallaxes obtained using VEDA and AIPS are coincident within 10 μas. VEDA is available for high-precision parallax and proper motion measurements of Galactic maser sources.

scholarly journals New high precision measurements of the cosmic charged particle rate beyond the Arctic Circle with the PolarquEEEst experiment

2020 ◽  
Vol 80 (7) ◽  
Author(s):  
M. Abbrescia ◽  
C. Avanzini ◽  
M. Arlandoo ◽  
G. Balbi ◽  
L. Baldini ◽  
...  
Keyword(s):  
Data Analysis ◽  
Charged Particle ◽  
Sea Level ◽  
High Precision ◽  
Precision Measurements ◽  
The Arctic ◽  
Arctic Circle ◽  
Latitude Range ◽  
Set Up

AbstractThe goal of the PolarquEEEst experiment was to measure the cosmic charged particle rate at latitudes greater than 66$$^{\circ }$$ ∘ N, where no systematic and accurate measurements at sea level have ever been performed. A latitude range well above the Arctic Circle was explored on board of a sailboat, up to the unprecedented northernmost value of $$82^{\circ }07^{\prime }$$ 82 ∘ 07 ′ N. In this paper a description of the experimental set-up is reported, then the procedures for calibration and data analysis are described in detail. The results show that the rate measured in this latitude range stays constant within a novel accuracy of $$\pm 1$$ ± 1 %.

A Simple Method for Determination of the Elastic Modulus of Thin Films on a Substrate

1993 ◽  
Vol 308 ◽  
Author(s):  
M.V. Swain ◽  
E.R. Weppelmann
Keyword(s):  
Thin Films ◽  
High Precision ◽  
Elastic Contact ◽  
Precision Data ◽  
Simple Method ◽  
Tin Film ◽  
High Precision Data ◽  
Properties Of Materials ◽  
Force Displacement

ABSTRACTHigh precision force displacement indenting instruments are now widely used for the determination of the mechanical properties of materials. However, for thin films attached to a substrate, the basis of any analysis of such high precision data is still limited. In this study the force displacement data has been generated using spherically tipped indenters of radii from 5 to 150 μm loaded onto a 2.74 μm thick TiN film on a silicon substrate as well as onto the substrate directly. Data have been generated using two loading procedures, continuous and load partial-unloading, almost entirely within the elastic contact regime. The results are analysed to determine the modulus of the TiN film.

scholarly journals Acoustic Analysis of Obstruents in Some Igbo Dialects

2020 ◽  
Vol 10 (12) ◽  
pp. 1510
Author(s):  
Benita Nneka Anyasi ◽  
Olusanmi Babarinde ◽  
George Iloene
Keyword(s):  
Data Analysis ◽  
High Precision ◽  
Acoustic Analysis ◽  
Native Speakers ◽  
Syllable Structure ◽  
Acoustic Properties ◽  
Acoustic Structure

The study examines two dialects of the Igbo language, namely Aro and Mgbo, and analyses the acoustic structure of its obstruents as spoken by native speakers. This study sets out to, among other things, identify the obstruents which occur in the dialects, characterise these obstruents, analyse the acoustic properties, and find out the manner of relatedness of the obstruents in the two dialects. Four adult respondents (two for each dialect) aged between 60-80 years who are native speakers of the dialects were randomly selected. The data were recorded electronically using a high precision Sony ICD-UX560 recorder and transferred into the computer via Praat speech analyzer software. The data analysis was carried out with the SIL Speech Analyzer version 3.0.1 (1996-2007) and Praat. These were used in transcribing recorded tokens, cutting portions of tokens and analyzing the data. The measurement of the pitch, intensity and duration reveal some significant differences within the two dialects. In most Northern Igbo (Waawa) dialects, back rounded vowels are weakened as is evinced in [nɣɔkə] and [ŋkɔ]. Although the vowels are evident in the syllable structure, the final vowels are so weak that they are not phonetically interpretable.

Conceptual Design and Modelling of a Self-Adaptive Compliant Parallel Gripper for High-Precision Manipulation

2012 ◽  
Author(s):  
Guangbo Hao ◽  
Xianwen Kong
Keyword(s):  
Stress Concentration ◽  
Conceptual Design ◽  
High Precision ◽  
The Self ◽  
Performance Characteristics ◽  
Linear Actuator ◽  
Amplification Ratio ◽  
Bistable Mechanism ◽  
Force Displacement ◽  
Self Adaptive

To meet the need of advanced compliant parallel grippers (CPGs), this paper deals with the conceptual design and modelling of a novel self-adaptive CPG for high-precision manipulation. A self-adaptive CPG is proposed by using a cymbal-type amplifier and two parallelogram modules at first. The self-adaptive grasping function ensures the mobility of one jaw if another jaw is constrained. Then the displacement amplification ratio and the force-displacement equations of the self-adaptive CPG are derived and compared with the FEA results. Finally, the variations, especially the case with a bistable mechanism as the jaw, are discussed. The self-adaptive grasping function of the proposed CPG is unique compared with the existing CPGs driven by only one linear actuator. Other good performance characteristics of the proposed self-adaptive CPG include: large-stroke, no stress-concentration, minimized parasitic rotation of the jaw, actuator isolation, and a simple and compact configuration.

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