Research on Dot Gain Compensation Curve Algorithm Model

2012 ◽  
Vol 200 ◽  
pp. 627-631 ◽  
Author(s):  
Li Li Si ◽  
Feng Xian Sang ◽  
Zhen Liu
Keyword(s):  
New Method ◽  
Average Error ◽  
Dot Gain ◽  
Gain Compensation ◽  
Normal Method ◽  
Compensation Curve

To make the dot gain compensation curve more precise, this paper analyzes the methods already used and then propose a new method. We implement this new method and the old ones respectively through MATLAB, and get their dot gain compensation curves. At the same time, the average error and variance were counted to test their precision. The results show that the new method can apparently improve the precision and reduce the error. The average error of the normal method is 2.96% while it is reduce to 1.56% by the new method.

scholarly journals Heave Motion Measurement by Adaptive Filter Based on Longuet-Higgins Wave Model

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Jiazhen Lu ◽  
Qiuwei Luo ◽  
Yanqiang Yang
Keyword(s):  
Adaptive Filter ◽  
Cutoff Frequency ◽  
Wave Model ◽  
Absolute Error ◽  
Average Error ◽  
Measurement Results ◽  
Highpass Filter ◽  
Normal Method ◽  
Heave Motion ◽  
Rough Sea

A method is proposed to obtain heave motion information based on the Longuet-Higgins wave model. The Longuet-Higgins wave model which is closer to the sea wave is introduced. Based on it, random process of the noise is analyzed and the highpass filter is designed to reduce errors. Then it is the key point in this article that an adaptive algorithm is put forward because of the complexity of the waves. The algorithm adjusts the cutoff frequency to reduce the amplitude attenuation of the filter by analyzing the wave. For the same reason the comprehensive parameter of the phase compensation can be also obtained by the algorithm. Simulation measurement results show that under the rough sea situation the maximum value of absolute error is 0.4942 m according to the normal method, the method is 0.1170 m, and the average error ratio of the rough sea test reduces to 3.89% from 12.54%, which demonstrates that the adaptive filter is more effective in measuring heave movement. A variety of simulation cases show that the adaptive filter can also improve the precision of the heave motion under different sea situations.

A New Method for Measuring the Bond Strength of Electrofusion Joint

2013 ◽  
Author(s):  
Jinyang Zheng ◽  
Dongsheng Hou ◽  
Jun Shi ◽  
Shunli Lu ◽  
Jianfeng Shi ◽  
...  
Keyword(s):  
Bond Strength ◽  
Peel Test ◽  
High Strength ◽  
New Method ◽  
Pipeline System ◽  
Welding Defects ◽  
Good Concentration ◽  
Normal Method ◽  
Composite Pipes ◽  
Peel Tests

Electrofusion (EF) technique is very widely used in connecting polyethylene and its composite pipes. Safety of pipeline system depends on the quality of joints. For EF joints, the quality is characterized by the bond strength of welding interface. Peel test is a normal method for measuring the bond strength for EF joints. In our previous study (PVP2012-78655), we used the peel test to analyze the bond strength for EF joints with cold welding defects by calculating the bonding energy of fusion interface. However, in most well electrofused joints, test specimens fail in the pipe, rather than the fusion interface. As a result, it is difficult to determine the optimum welding conditions with the method of peel test. In this paper, a new method for measuring the bond strength of EF joint is proposed. A set of horizontal apparatus is designed and specific improved test means are introduced. Test results are then presented, which proves the effectiveness of the new method for high strength joints and in reducing pipe deformations. Finally, criteria to estimate the bond strength of joints are investigated. A comparison is made between the criterion of mean percentage decohesion presented in ISO 13954 and the criterion of normalized decohesion energy, which reveals that the latter one is more practical in statistics for peel tests, with better normality, a good concentration of data and facility to rank EF joints of different types.

Research on the Method of Determining the Optimum Parameters for Offset Ink

2010 ◽  
Vol 174 ◽  
pp. 255-258
Author(s):  
Wen Yan Jiang ◽  
Zhi Hong Wang
Keyword(s):  
Process Control ◽  
Experimental Method ◽  
Printing Process ◽  
Tone Reproduction ◽  
Optimum Parameters ◽  
Calibration Curves ◽  
Printing Quality ◽  
Dot Gain ◽  
Gain Compensation ◽  
The Relationship

By experimental method, the optimum parameters for offset ink were investigated under standard printing conditions. Firstly, the relationship between solid ink density and print contrast was established, and the optimum values of solid ink densities and print contrasts were calculated. Then, perfect tone reproduction was achieved by dot gain compensation, in which the calibration curves were obtained by the target curves and the initial tone value increase(TVI) curves based on optimum SIDs. The results showed that this method of determining the optimum parameters for offset inks were practicable and reliable, it can be used to research the printability of inks and papers, optimize printing process, improve printing quality, and provide method of standardization of process control for printing institutions.

scholarly journals QUALIMETRIC ANALYSIS OF MISTAKEN ACTIONS OF THE CLIMBER DURING THE PASSING OF THE COMPETITIVE ROUTE

2020 ◽  
Vol 20 (4) ◽  
pp. 62-71
Author(s):  
Juri Vasilievich Kotchenko
Keyword(s):  
Error Rate ◽  
Standard Error ◽  
Quantitative Assessment ◽  
Negative Impact ◽  
New Method ◽  
Complete Analysis ◽  
Average Error ◽  
Direct Impact ◽  
Average Error Rate ◽  
Spatial And Temporal Characteristics

The article presents the results of studies devoted to the analysis of erroneous actionsof the climber at the time of passing the competitive route. During the three competitive seasonsof 2016–2018 the performances of women at major international tournaments in the disciplineof difficulty climbing were studied (n = 631). Studies have revealed the main errors made duringthe climbing, to classify them, to determine the signs of controlled and uncontrolled errors. It wasestablished that the controlled errors do not have a noticeable direct impact on the result, but havea negative impact on the main spatial and temporal characteristics of climbing.A fundamentally new method of quantitative assessment of technical and tactical errors hasbeen developed, based on the use of the time factor of erroneous actions. Calculations made usingthe new method that the average error rate for champions is 0.28 points, for prize-winners is 0.40,and for athletes taking a place below the 20th is 1.6 points. During the analysis of the collected data,the of connection with the result of the performance R = 0.81 was established and the nature of thedependence of this relationship was determined.The regression model is constructed, which allows to calculate the standard error value dependingon the length of the passed section and determine its location in the overall of the competitive process.The knowledge of the error value makes it possible to conduct a complete analysis of the sportsperformance, the lost part of the competitive as a result of the error and adjust the training processin order to minimize erroneous actions.

Probabilistic Assessment of ILI Metal Loss Features

2010 ◽  
Author(s):  
Peter D. Chan ◽  
David Webster
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
New Method ◽  
Point Estimate ◽  
Metal Loss ◽  
Probabilistic Assessment ◽  
Maintenance Planning ◽  
Point Estimate Method ◽  
Estimate Method ◽  
Normal Method

In-line inspection (ILI) gives pipeline operators a snapshot of the condition of their pipelines. Unfortunately, accuracy limitations exist with all ILI tools. It is therefore judicious for pipeline operators to support their pipeline integrity maintenance planning by employing Probability of Exceedance (POE) methodology that accounts for the inexact nature of the ILI data. A new method is needed that can be used to assist pipeline operators make rational and defensible integrity decision when faced with very poor pipeline conditions with numerous interacting metal loss defects. The normal method of using RSTRENG with Monte Carlo Simulation (MC) for probabilistic assessment of corroded pipeline pressure is unsuitable and unmanageable. The new method employs DNV-RP-F101 with Point Estimate Method (PE) and the MC to efficiently apply the POE methodology to severely corroded pipelines.

scholarly journals NEW METHOD FOR THE COST ASSESSMENT ANALYSIS OF SHELL-AND-TUBE HEAT EXCHANGERS

2021 ◽  
Vol 51 (4) ◽  
pp. 315-320
Author(s):  
Yanan Camaraza-medina ◽  
Abel Hernandez-guerrero ◽  
Jose luis Luviano ortiz
Keyword(s):  
Heat Transfer ◽  
Heat Exchangers ◽  
New Method ◽  
Average Error ◽  
Cost Assessment ◽  
Real Cost ◽  
Simplified Method ◽  
Practical Design ◽  
Shell And Tube ◽  
The Cost

A new simplified method for the cost assessment analysis of shell-and-tube heat exchangers (STHE) is presented in this paper. A comparison was carried out between the values obtained by the proposed method with the FOB average real cost for a total of 410 heat exchangers, with heat transfer surfaces ranging between 5 to 1150 m2. It was found that the proposed method correlates well with an average error of 10.1% , for 84.15% of the available data. The method presents a lower adjustment in the range , with an average error of 12.9%, for 82.97 % of the available data. The best adjustments are located in the range, with an average error of only 8.0%, for 80.95 % of the available data. In all cases, the agreement of the proposed method is good enough to be considered satisfactory for practical design.

scholarly journals Impulsive spike enhancement on gamelan audio using harmonic percussive separation

2019 ◽  
Vol 9 (3) ◽  
pp. 1700
Author(s):  
Solekhan Solekhan ◽  
Yoyon K. Suprapto ◽  
Wirawan Wirawan
Keyword(s):  
Source Separation ◽  
New Method ◽  
Average Error ◽  
Distance Method ◽  
Audio Quality ◽  
Average Value ◽  
Perceptual Evaluation ◽  
Harmonic Components ◽  
Cosine Distance ◽  
Average Cosine

Impulsive spikes often occur in audio recording of gamelan where most existing methods reduce it. This research offers new method to enhance audio impulsive spike in gamelan music that is able to reduce, eliminate and even strengthen spikes. The process separates audio components into harmonics and percussive components. Percussion component is set to rise or lowered, and the results of the process combined with harmonic components again. This study proposes a new method that allows reducing, eliminating and even amplifying the spike. From the similarity test using the Cosine Distance method, it is seen that spike enhancement through Harmonic Percussive Source Separation (HPSS) has an average Cosine Distance value of 0.0004 or similar to its original, while Mean Square Error (MSE) has an average value of 0.0004 that is very small in average error and also very similar. From the Perceptual Evaluation of Audio Quality (PEAQ) testing with Harmonic Percussive Source Separation (HPSS), it has a better quality with an average Objective Difference Grade (ODG) of -0.24 or Imperceptible.

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