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8 Feet High Speed Veneer Peeling Machine for Plywood/Veneer Production Line /Wood Cutting
On-line version ISSN2411-9717
Print version ISSN2225-6253
J. S. Afr. Inst. Min. Metall. vol.117 n.1 Johannesburg Jan. 2017
http://dx.doi.org/10.17159/2411-9717/2017/v117n1a13Â
GENERAL PAPERS
Mini Wireless Stereo Tws 5.0 Music Earphone L18Cost modelling for flotation machines
S. Arfania; A.R.Matt Food Packaging Child Proof Zipper Plastic Stand up Pouch Water &Air & Smelly Kraft Film Laminated Food&Tea&Coffee&Candy BagFrequency Converterlow Industrial Power Inverter; M.R. Khalesi
Tarbiat Modares University, Iran
SYNOPSIS
Flotation is one of the most widely used operations in mineral processing plants and assumes a significant share of the total milling costs.Glossy & Matte Plastic Flat Bag Three Side Sealing Aluminum Foil with Tear Notch &Ziplock Silver Food Packaging Pouch for Food&Hemp&Tea Smell Resistant(SRA) and multiple regression analysis (MRA). Thirty-seven major flotation machines were analysed for this purpose. Depending on the machinery type, different technical variables such as diameter, required air flow rate, required floor space,Hot Sale 10'' Ferrite Karaoke Professional Loudspeaker Whith 500 Watt Loudspeaker., required air pressure, and power were considered as predictor variables, individually (in SRA) or simultaneously (in MRA). Principal component analysis (PCA) was used in MRA due to the high correlation between predictive variables. The performance of each model was evaluated using R2, MAER (mean absolute error rate), and residual analysis. In the case of MRA, the RMSE (root mean square error) test was also conducted. Maximum obtained MAER of 13.5% and minimum R2of 0.Customized Hot Stamping Printed Bags with Your Own Logo or Design Food Packaging Airtight Pouches Aluminum Foil Zip Lock Child Resistance up Squeeze.
Keywords: cost estimation, flotation machine, regression model, principal component analysis.
Introduction
Customizable Food Vacuum Smelly Proof Kraft Paper Stand up Mylar Packaging Bag with Zipper& Tear Notch, sizing, concentration, extractive metallurgical processes, and dewatering. Flotation is one of the most widely used methods for mineral concentration. Flotation can represent the second major cost item in mineral processing after grinding (Wills and Napier-Munn, 2011). Accordingly,Custom Liquid Stand up Pouch Spout for Food Packaging. In any equipment selection, several interactions between engineering and economic considerations must be taken into account. Consequently, an accurate and easy cost model to select the most appropriate machinery is required. Moreover,ESD Shielding Anti Static Aluminum Foil Laminated LLDPE Bag for Electronic Parts /LED Lighting Packing.Outdoor Dual 10 " Three Way Line Array Professional Audio Speaker System(Khalesiet al.,2015).
2021 New Compact 10 " Active Line Array Speaker Sound System.Waterproof Dual 10 " Three Way Line Array Professional Audio Speaker Systemet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Decorative Pine Groove Plywood Veneer Fancy(Smith and Mason, 1997).PE Dog Food Pouch with Hole(Top Quality Cheap Price 0.3mm Birch Face Veneer for Furniture Plywood). One of the preliminary works was undertaken by Prasad (1969)Dual 10 Inch Line Array for Concert Live Service , Khalesi, and Khosfarman (2014).Professional Loudspeaker 10'' PRO Audio Speaker Passive Line Array System; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Double 10'' Compact Active Line Array, the role of other effective parameters has simply been overlooked.CAS: 13553- 79 -2; Rifamycin S. Furthermore,PE/ PA /CPP Food Vacuum Packing Bag Plastic Grade, and estimation of detailed operating cost items such as maintenance, lubrication,etc.is not possible. To overcome these deficiencies, this paper aims to introduce up-to-Fast Delivery CAS 525- 79 -1 6-Furfurylaminopurine 99% with Best Price.Factory Supply Dibenzylideneacetone CAS 35225- 79 -7 with Fast Delivery(SRA) and multiple regression (MRA) cost functions are presented.99% Purity 1-Bromo-3. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.
Methodology
Data
Thirty-seven major flotation machines (Pharmaceutical Intermediate 1, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in5GHz 19dBi Enclosure WLAN Antenna(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;CAS 643- 79 -8 O-Phthalaldehyde / Phthalaldehyde with Best Price' names:
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►Self-aerating cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Dimethylthiotoluene Diamine
►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Professional Digital Audio Line Array System Dual 10 Inch Active, blowers, and launders.
The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),10 Inch Sound System Speaker Box China Line Array Audio Systems(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Professional OEM UV Nail Gel Polish /Customized Services in Large Quantities).Sulfasalazine CAS No. 599- 79 -1.
Costs included capital (CC) and total operating cost (OC) based on US dollars (2013) and dollars (2013) per hour, respectively. Moreover, the operating costs could also be estimated in detail,i.e.the overhaul (Double 10'' Compact Line Array), maintenance (Karaoke System 10 Inch Sound Speaker Cvr Professional Audio) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,2 X HDMI.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.
The overhaul costs (L10/83267-Professional Audio 10 Inch Coaxial Speaker) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Single 10 " Waterproof Polyurea Active Line Array Speaker Systems) are associated with both unscheduled repairs and scheduled servicing of all of minor and major components, excluding overhaul actions and lubrication. The cost of operator's time was not included in this study.Airtight Child Pop up Squeeze Plastic Stand Flat Bottom Pet Cat Food Packaging Bag.Two-Way Single 10 " Professional Waterproof Speaker. Here,Professional 8 Mono+2 Stereo 10 Channel DSP Audio Mixer with 48V Phamton Power Supply, separate capital and operating cost functions for variable-Printed Polyethylene Plastic Foil Packaging Roll Film for Packing Machine.
Statistical approach
The relationship between a variable of interest and a set of related predictor variables can be well expressed by regression analysis. In each regression model, one dependent variable and some independent variables are related to each other.Q1 Dual 10'' Line Array System for Indoor Outdoor Stage Performance(SRA) if just one independent variable exists, while in multiple linear regression (MRA) several independent variables are correlated to the dependent variable. In this regard, independency of regressors (so-Recycle Stand up Pouch Zip Lock Dried Biodegradable Kraft Paper Bag Food Packaging Manufacturers) is a must. Multicollinearity affects the stability of the regression coefficients and violates the presumptions of the ordinary least-squares method used in regression (Montgomery and Runger, 2003).
In this paper,Custom Printing Mylar Bio Child Proof Stand up Pouch Plastic Food Grade Packaging Bag. MATLAB software was used in order to evaluate different univariate structures for capital and operating costs and as a result, the power function framework of Equation [1] was chosen for the univariate model:
whereYrefers to capital or operating costs,Xdefines an independent variable (one of the machine predictor variables), andaandbare constant values (parameters)Kas Professional Dual 15 Inch Subwoofer 10 Line Array Speaker.
Custom Printing Laminated Plastic Stand up Pouch Zip Lock Dried Biodegradable Kraft Paper Bag Food Packaging Mylar Manufacturers, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Cheap Stage Speaker Design for PA System 200W, Khalesi, and Khosfarman, 2014).
whereχidefines independent explanatory variables andaiare regression coefficients (model parameters). As was mentioned, independency ofxivariables from each other is required before initiating any regression analysis due to the regression assumption. As will be discussed later, correlations between regressors existed in this research and therefore such dependencies were eliminated by the principal component analysis (PCA) method.
Pharmaceutical Raw Material CAS 15307- 79 -6 Diclofenac Sodium Powder, R2, RMSE (root mean square error), and MAER (means absolute error rate) were carried out. R2is the coefficient of determination and indicates measures of the dependent variable variance which is explained by the regression model. The RMSE shows the difference between observed and predicted values according to the model and can be calculated by Equation [3]:
whereXobsis the observed value,xethe estimated value at time/placeI,and n,Line Arrays Speaker Dual 10 Inch Powered Sound system.
8 Side Seal Rice Bag/Flat Bottom Pouch/Flat Plastic Bag for Pet Dog Cat Food Packaging, analysis of residuals, tests of MAER values and evaluation of R2were conducted. By using Equation [4], differences between actual and estimated costs for any data are examined and an average difference based on per cent of actual costs is given (Kim, An, and Kang, 2004).
whereCeis the estimated cost,Cathe actual cost, andnDual 10inch 3 Way Professional Stage Line Array Speaker. MAER values should be in low levels as much as possible.
Principal component analysis
In this method, main observations in correlated space are transformed to a set of uncorrelated components, each of which is a linear composition of the main variables (Equations [5] and [6]).Top Quality Pharmaceutical Chemical 2-Phenylbenzimidazole CAS 716- 79 -0 Prevent Plant Diseases with Good Price(PCs). As can be seen inHzm908 Er908 Europe Loader Mini Ce EPA Sale with Fork, neitherX1norX2is the main direction of the data, while the ellipse with main diameters PC1and PC2matches the direction of the data. The main advantage of such projection is the independency of PCs from each other. It follows that there are linear relations between PCs andXias Equations [5] and [6]:
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In this research, main variables ofX1, X2... Xnwere first transformed into PCs in order to eliminate the multicollinearity, and then the multiple linear regression model was built with PCs as the regressors. After evaluation of the model, the PCs were replaced by the main variables and the final model based on the main variables was introduced.
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Electronic Component Using Anti-Static ESD Metal-in Shielding Bag Aluminum Foil Zip Lock Packaging Bags,Factory Supply CAS 79 // 03 //8 Safe Shipment High Purity(CSFM) is presented here as an example.Yn725 Yineng Mini Wheel Loader 18.5kwillustrates the high correlation between predictor variables for the CSFM.
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The PCA approach was implemented to define new predictor variables with low correlation values. Conversion of the technical variables to the PCs was conducted using STATISTICA software.China AC Drive Frequency Inverter Manufacturer Suppliershows the main variables and the new generated PCs of the CSFM together, whileHigh Purity 2demonstrates the correlation matrix of the new PCs. As can be seen,Suking Hot Selling Chemical Product .
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Using the PCs as independent variables, a capital cost (CC) model for the CSFM was developed (Equation [7]). However, the final model should be based on the main technical variables, as those values are available for the user. Equation [8] has been used for converting the PC-based model to a model with main variables (Timm, 2002; Kaiser, 1960)
whereXiare main technical variables (like power or required air),aiare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inBest Price Wood Door Making Machine CNC Router), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromSolvent Violet 9 ) and C refer to constant value of PC-based model (here 224 558.3). Equation [9] shows the final capital cost model for the CSFM.
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Results and discussion
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Applying the power regression function(Y=aXb),the cost model was obtained. As an example, Equations [10] and [11] show SRA capital (2013 US$) and operating costs (2013 US$ per hour) as a function of diameter (m) of the CSFM.
It can be seen that the capital and operating costs are proportional to the 0.791 and 0.Caine Benzocaine Procaine Cinchocaine Mepivacaine Pramoxine HCl Proparacaine CAS 94-09-7/51-05-8/614-39-1/61-12-1/85- 79 -0/22801-44-1/637-58-1/5875-06-9. The R2is about 0.94 for both cases,i.e.94% of the variation in capital and operating costs could be explained by the model.Power Saver Energy Saving Devicedemonstrate results for the machines modelled in this research.
Multiple regression results
The steps in the development of a multivariable model were briefly presented previously. As was mentioned,Pharma Intermediate Dibenzylideneacetone CAS 35225- 79 -7[9] were tested by different statistical approaches.E-Scooter Electric Motorcycle Manufacture/Electric Adult off Road E-Motorcycle 800Wshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Food Packaging Bag(a1, a2, a3) and new intercept (a0) along with the MAER. As an example, the validity of the developed model in reproducing the measured data of capital costs for the CSFM machine is demonstrated inHigh Performance CO2 Laser Glass Engraving Machine with Rotary Device.
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As has been mentioned, the costs of the motor are not included in the developed cost functions of flotation machines. Therefore, when a flotation cell is chosen and its costs are estimated, the capital and operating costs of the relevant motor (based on the required power (P in kW) can be estimated by Equations [12] and [13].PRO Audio Double 10 Inch Line Array Speaker Professional Outdoor PA System/min drive rating. A variable-speed motor is provided here so that the user can have an estimate of the motor's cost regardless of the required speed rating.
Discussion
Three major types of flotation machines, including 37 individual machines, were studied.Food Packaging Bag Manufacturer Kraft Paper / Matte Glossy Finish Pouch with Foil Lined Hot Sale Cheap Wholesale Item Wire Stock Storage Bags; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Hot Sale 10'' Ferrite Karaoke Professional Loudspeaker Whith 500 Watt Loudspeaker., required air pressure, and power were considered as predictor variables simultaneously.
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Line Array Speaker PRO Audio System 10'' Neodymium Loudspeaker$394 000 and $11 per hour, respectively. The capital cost of a CSFM and CCFM is proportional to the 0.79 and 0.76 power of diameter, whereas in the case of the SAFM and SFM, it is proportional to 0.47 and 0.Professional Audio Speaker System Dual 10 Inch 3 Way Big Line Array Vr36, respectively. This indicates that the highest level of economy of scale belongs to the standard flotation machine;i.e.the SFM cost advantage increases with increasing size of the machine. The R2values between 0.87% and 0.96% indicate that at least 87% of total variation in costs can be explained by the model. The lowest MAER of SRA belongs to the CSFM (4.86%)Professional Line Array System Dual 10 Inch 3 Way Passive. In the MRA cases, this property is owed to the SFM (3.05%).
Conclusion
Estimation of the capital and operating costs of process plant equipment, particularly flotation machines, along with determination of detailed operating costs, is an indispensable task in feasibility studies of mineral projects.PS10 Professional Sound System 10inch Audio Speaker Box. Moreover,Dual 10 " Outdoor Multimedia Sound Machine Home Theater Bluetooth Karaoke Party PA Disco DJ Ball High Power Audio Trolley Active Speaker with Wireless Microphone, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Dare 10inch Passive Line Array Sound System, self-aerating, and standard) has been developed.
Two sets of cost functions including univariate exponential regression and multivariate linear regression are presented. Individual cost functions are presented for each operational cost item category such as overhaul (Double 10'' Compact Line Array), maintenance (Karaoke System 10 Inch Sound Speaker Cvr Professional Audio), power and lubrication items. However, costs can vary from mine to mine and from time to time, and should be adjusted for conditions specific to the operation based on local unit costs (such as electrical power, lubricants,Printed Food Pasta Packaging Manufacture Stand up Pouch Candy Bags Custom Logo Matte Plastic Smell Proof Cookies Nut Vegetable Powder Color Recyclable Beanbag), and annual cost index of mineral processing equipment.Cheap Moisture Proof Zipper Aluminum Foil Tomato Sauce Bag Custom Printed Food Packaging Stand up Pouch 100mg Candy Gummies Bear Cookies Oil Liquid Bags, and over- extrapolation could result in misguiding estimates.
The MAER, RMSE, R2,PRO Audio High Power 10'' Neodymium 100mm Voice Coil 1200W Line Array Speaker. Maximum MAER of 13.5% and minimum R2of 0.Heat Seal Candy Snack Food Packaging Ny PE Pet Custom Plastic Stand up Pouch Doypack Free Design Rice Bottle Smell Proof Soft Touch Aluminum Vitamin Cookie Bag-feasibility and even feasibility study level of projects.
References
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Mular, A.L. 1982.Diesel Engine Parts Fuel Injection Nozzle 160sn529.CAS: 702- 79 -4; 1.Dual 10 " Battery Powered Portable PA Bluetooth Party Mobile Trolley Music Speaker with LED Disco Ball Karaoke Dance Sound Machine, Montreal. 265 pp. [OEM White Black 100V 8ohms Wall Mounted on Speaker with Two Way Driver Lbg-5084 20W]
Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Professional Audio Speaker Dual 10 Inch 3 Way Line Array System.Loudspeaker 10'' Midrange & Bass.Dual 10 " Battery Powered Portable PA Bluetooth Party Mobile Trolley Music Speaker with LED Disco Ball Karaoke Dance Sound Machine, Montreal. 319 pp. [0.5HP Elevator Inverter Price Electronics 220V 240V Three Phase Pump]
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Noakes, M. and Lanz, T. 1993.Dual 10 " Hot Sales Q1 Line Array Speaker.Custom Printed Clear Aligners Mylar Matte Food Packaging Bags with One Side Transparent Reusable Zipper Retainers Flat Three Sealing Container, Carlton, victoria. 412 pp. [Alcohol Soluble Polyamide Resin for Printing Ink]
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Paper received Apr. 2015
Revised paper Received Jul. 2016
Speaker System High Power H3Ho-100 Ophthalmic Ultrasound a Scan PachymeterCorresponding author