A study of the effects of the process parameters on the flexographic printing problem “dot bridging” – part II: experimental design and print contrast/density

2005 ◽  
Vol 34 (2) ◽  
pp. 94-100 ◽  
Author(s):  
David Galton
Keyword(s):  
Experimental Design ◽  
Process Parameters ◽  
Flexographic Printing

scholarly journals Impact of Process Parameters on the Diameter of Nanobubbles Generated by Electrolysis on Platinum-Coated Titanium Electrodes Using Box–Behnken Experimental Design

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2542
Author(s):  
Karol Ulatowski ◽  
Radosław Jeżak ◽  
Paweł Sobieszuk
Keyword(s):  
Experimental Design ◽  
Process Parameters ◽  
Current Density ◽  
Salt Concentration ◽  
Multivariate Regression ◽  
Electrical Energy ◽  
Multiphase System ◽  
Anova Analysis ◽  
Dependent Variables ◽  
Parameter Function

(1) The generation of nanobubbles by electrolysis is an interesting method of using electrical energy to form bubble nuclei, effectively creating a multiphase system. For every process, the effectiveness of nanobubble generation by electrolysis depends on various process parameters that impact should be determined. (2) In this work, the electrolytic generation of hydrogen and oxygen bubbles was performed in a self-built setup, in which a Nafion membrane separated two chambers. The generation of bubbles of both gases was investigated using Box–Behnken experimental design. Three independent variables were salt concentration, current density, and electrolysis time, while the dependent variables were Sauter diameters of generated bubbles. An ANOVA analysis and multivariate regression were carried out to propose a statistical and power model of nanobubble size as a process parameter function. (3) The generation of bubbles of hydrogen and oxygen by electrolysis showed that different factors or their combinations determine their size. The results presented in this work proved to be complementary to previous works reported in the literature. (4) The Sauter diameter of bubbles increases with salt concentration and stays constant with increasing current density in investigated range. The proposed correlations allow the Sauter diameters of nanobubbles generated during electrolysis to be predicted.

scholarly journals Weldability Investigation and Optimization of Process Variables for TIG-Welded Aluminium Alloy (AA 8006)

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
T. Sathish ◽  
S. Tharmalingam ◽  
V. Mohanavel ◽  
K. S. Ashraff Ali ◽  
Alagar Karthick ◽  
...  
Keyword(s):  
Experimental Design ◽  
Aluminium Alloy ◽  
Process Parameters ◽  
Surface Hardness ◽  
Weight Ratio ◽  
Welding Process ◽  
Tig Welding ◽  
Low Weight ◽  
Superior Corrosion Resistance ◽  
Welding Processes

Aluminium and its alloys play a significant role in engineering material applications due to its low weight ratio and superior corrosion resistance. The welding of aluminium alloy is challenging for the normal conventional arc welding processes. This research tries to resolve those issues by the Tungsten Inert Gas welding process. The TIG welding method is an easy, friendly process to perform welding. The widely applicable wrought aluminium AA8006 alloy, which was not considered for TIG welding in earlier studies, is considered in this investigation. For optimizing the number of experiments, the Taguchi experimental design of L9 orthogonal array type experimental design/plan was employed by considering major influencing process parameters like welding speed, base current, and peak current at three levels. The welded samples are included to investigate mechanical characterizations like surface hardness and strengths for standing tensile and impact loading. The results of the investigation on mechanical characterization of permanent joint of aluminium AA8006 alloy TIG welding were statistically analyzed and discussed. The 3D profilometric images of tensile-tested specimens were investigated, and they suggested optimized process parameters based on the result investigations.

Optimization of physical parameters for phycobiliprotein extracted from Oscillatoria agardhii and Synechococcus nidulans / Oscillatoria agardhii ve Synechococcus nidulans türlerinden fikobiliprotein ekstraksiyonu için fiziksel parametrelerin optimizasyonu

2015 ◽  
Vol 40 (6) ◽  
Author(s):  
İrem Deniz ◽  
Esra İmamoğlu ◽  
Meltem Conk Dalay
Keyword(s):  
Response Surface Methodology ◽  
Experimental Design ◽  
Light Intensity ◽  
Response Surface ◽  
Process Parameters ◽  
High Yield ◽  
Physical Parameters ◽  
Agitation Rate ◽  
Orbital Shaking ◽  
Oscillatoria Agardhii

AbstractObjective: Physical process parameters play a major role in the cultivation of cyanobacteria to provide high yield. The aim of this study was to optimize physical parameters such as light intensity and agitation rate which might affect the phycobiliprotein formations for cyanobacterial strains of Oscillatoria agardhii and Synechococcus nidulans using response surface methodology.Methods: The cyanobacterial strains were cultured in 250 mL flasks containing 100 mL of EM medium in orbital shaking incubator under the temperature of 22±2°C at different light intensities and agitation rates for 10 days. The experimental design was carried out using 2Results: The optimization solution of O. agardhii (approximately at 156 rpm under the light intensity of 65 μmol photons mConclusion: High agitation rate stimulated the faster growth than increased the light intensity for the growths of cyanobacterial strains.

Technique Optimization of Dual Rotation Plates Lapping Method for Ceramic Ball

2007 ◽  
Vol 359-360 ◽  
pp. 314-318
Author(s):  
Xun Lv ◽  
Ju Long Yuan ◽  
Yong Dai
Keyword(s):  
Experimental Design ◽  
Taguchi Method ◽  
Surface Quality ◽  
Process Parameters ◽  
Ceramic Ball ◽  
Slurry Concentration ◽  
Machining Conditions ◽  
Technique Optimization ◽  
Dual Rotation

Dual rotation plates lapping method can effectively solve the limitations of traditional ceramic ball machining methods. This paper focuses on the application of Taguchi method to optimize the technique parameters to lap ceramic ball. The main objective is to study impact degree of the process parameters (lapping load, lapping speed combination and slurry concentration). The results show that the experimental design based on Taguchi method can determine the optimum machining conditions which improve the surface quality and geometrical precision of ceramic ball.

An Effect of Process Parameters to Anodic Thickness in Hard Anodizing Process

2016 ◽  
Vol 872 ◽  
pp. 168-172
Author(s):  
Aunyanat Rattanasatitkul ◽  
Suksan Prombanpong ◽  
Pongsak Tuengsook
Keyword(s):  
Experimental Design ◽  
Oxide Film ◽  
Aluminum Oxide ◽  
Process Parameters ◽  
Cycle Time ◽  
Treatment Process ◽  
Aluminum Surface ◽  
Design Technique ◽  
Defect Rate ◽  
Hard Anodizing

The anodizing process is an aluminum surface treatment process which an aluminum oxide film forms on an aluminum substrate. Typically, the anodic thickness is a required specification which depends upon current density and anodizing cycle time. In addition, another important factor is ramp time which must be proper set to prevent a burn defect. Thus, this paper investigates a relationship among these three factors to determine the setting condition which minimizes the anodizing cycle time. Moreover, the required thickness must be obtained without increasing the burn defect rate. The experimental design technique is proposed to achieve this goal and it is found that the current of 35 amp, ramp time of 340sec and anodizing time at 1400 sec ensure the obtained anodic thickness greater than 30 micron.

Orthogonal Design Study on the Morphology of Electrospun Poly(butylene Succinate-co-Butylene Terephthalate) (PBST) Nanofibers

2013 ◽  
Vol 749 ◽  
pp. 23-26
Author(s):  
Feng Zhang ◽  
Xue Feng Sun ◽  
Yong Liu
Keyword(s):  
Experimental Design ◽  
Process Parameters ◽  
Orthogonal Design ◽  
Orthogonal Experimental Design ◽  
Optimum Conditions ◽  
Butylene Succinate ◽  
Butylene Terephthalate ◽  
Electrode Distance ◽  
Weight Concentration ◽  
Spinning Speed

A biodegradable co-polymer, Poly (butylene succinate-co-butyene terephthalate) (PBST) was fabricated into nanofibers by electrospinning. A 4-factor 3-level L 9(34) orthogonal experimental design was employed to examine the effects of process parameters on morphologies of PBST nanofibers. The results showed that the weight concentration = 13wt%, the applied voltage = 20kV, the spinning speed = 0.5ml/h, the electrode distance = 10cm and the diameter of needle = 0.7mm were identified as the optimum conditions.

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