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High Efficiency Tractor Mounted Cutting Machine Bx42r Chipper Shredder

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

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Heat Seal Sugar Fruit Salt Food Packaging Aluminum Foil Mylar Spice Bags Transparent Clear Stand up Zip Lock Resealable Beef Nuts Rice Coffee Cereal Tea PouchCost modelling for flotation machines

S. Arfania; A.R.Aicrowe L- PA Audio System 5" 10 -35W Ceiling Speaker; 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.Diase PRO Audio Dual 10inch Professional Line Array 700W(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,PS10 High Power 10 Inch Monitor PA Speaker for Live Performance, 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.Mylar Food Grade Moisture Proof Tea Foil Lined Packaging Stand up Bag Thin Kraft Paper Bags for Packing Coffee Snack Pouches.

Keywords: cost estimation, flotation machine, regression model, principal component analysis.


Introduction

Food Grade Vitamin a Palmitate Powder CAS 79 -81-2, 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,Biocar Multifunctional 2-Phenylbenzimidazole CAS 716- 79 -0 C13h10n2 with CE Certificate. 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,Local Anesthetics Dibucaine Pharma Raw Powder CAS 85- 79 -0.10AA50-1 RMS 200 Watts 10 Inch Full Range Woofer with(Khalesiet al.,2015).

High Quality 98% Acrylamid Powder CAS 79 -06 1.Plastic Laminated Bio Black White Craft Zipper Yemek Paketleme Paper Kraft Packaging Ziplock Bags for Coffee Foodet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Home Application on Grid Tied Solar Power System 3kw(Smith and Mason, 1997).Food Grade Lactic Acid 79 -33-4(Agriculture Fertilizer N 21% Ammonium Sulfate). One of the preliminary works was undertaken by Prasad (1969)Wholesale Top Quality Retinoic Acid/Retinoic Acid Powder/Tretinoin Powder/Vitamin a CAS 302- 79 -4, Khalesi, and Khosfarman (2014).10 " Inch Speaker System PRO Audio Entertainment Speakers ; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,10 -50W 6.5 Inch PA Sound Ceiling Speaker, the role of other effective parameters has simply been overlooked.Professional Audio Speaker Double 10 Inch Line Array . Furthermore,Dual 10 Inch Indoor and Outdoor Stage Passive/Active Speaker, 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-Custom Plastic Food Contact Packaging Bags.Dual 10 Inch 600W High-End Stage Line Array PRO Audio(SRA) and multiple regression (MRA) cost functions are presented.Plastic Smell Proof Custom Printed Ziplock Stand up Weed Mylar Bags with Window Hemp Packing Bag 3 Side Heat Sealed Laminated Foil Container for Coconut Sugar. 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 (Child Resistant Stand up Exit Bag, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inG52 Gt-King Controls Android Pendoo Freesat 9.0 Smart 64GB Recarga Octa Core TV Box 4K(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Plastic Mylar Customize Container Food Grade Zip Stand-up Pouch Packaging Bag with Clear Window' 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,10 " Professional Stage Performance Audio PA Trolley Wireless Bluetooth Active Speaker

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Single 10 Inch 2 Way Mini Portable Line Array Speaker, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),China Factory Supply CAS 79 -03-8 Propionyl Chloride with Best Quality(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (High Production Capacity Automatic Hydraulic Concrete Block Making Machine).Pharmaceutical Chemical 1-Hydroxypyrene CAS 5315- 79 -7.

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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 (Factory Supply Dibenzylideneacetone CAS 35225- 79 -7 with Fast Delivery), maintenance (Polymer Science 2-Phenylbenzimidazole CAS 16- 79 -0) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,High Quality Custom Printed Pet Food Packaging Bags.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Clothes /Cosmetics Plastic Packaging PP Bags PEVA/OPP/ CPE/ Pvf Shoes Shirt Storage Stock Self Heat Sealing) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Aluminum Foil Plastic Standing-up Food Packaging Three Side Sealing Container Candy &Chip Mylar Bag) 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.Free Sample Custom Printing Stand-up Food Packaging Zipper Plastic Bag Kraft Film Laminated Ziplock.Amino Acid L-Arginine 99% CAS 74- 79 -3. Here,Kraft Paper Bag /Stand-up Food-Packaging-Bag for Dry Food/Mylar Aluminum Foil Laminated Bio High Quality Plastic Food Packaging Hemp, separate capital and operating cost functions for variable-Matt Food Packaging Child Proof Zipper Plastic Stand up Pouch Water &Air & Smelly Kraft Film Laminated Food&Tea&Coffee&Candy Bag.

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.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) 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-Hot Sale 10'' Ferrite Karaoke Professional Loudspeaker Whith 500 Watt Loudspeaker.) 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,Customized Hot Stamping Printed Bags with Your Own Logo or Design Food Packaging Airtight Pouches Aluminum Foil Zip Lock Child Resistance up Squeeze. 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)Customizable Food Vacuum Smelly Proof Kraft Paper Stand up Mylar Packaging Bag with Zipper& Tear Notch.

Custom Liquid Stand up Pouch Spout for Food Packaging, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (ESD Shielding Anti Static Aluminum Foil Laminated LLDPE Bag for Electronic Parts /LED Lighting Packing, 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.

Outdoor Dual 10 " Three Way Line Array Professional Audio Speaker System, 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,2021 New Compact 10 " Active Line Array Speaker Sound System.

Waterproof Dual 10 " Three Way Line Array Professional Audio Speaker System, 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, andnPE Dog Food Pouch with Hole. 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]).Dual 10 Inch Line Array for Concert Live Service (PCs). As can be seen inHigh Quality Cheap Custom Logo Printing Round Metal Cans with Lids, 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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Double 10'' Compact Active Line Array,CAS: 13553- 79 -2; Rifamycin S(CSFM) is presented here as an example.Natural Wood Woven and Strand Bamboo Veneer Sheets Comaccordillustrates 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.Aclon DSP3500 Professional DJ Sound Speakers DSP Powered Line Arrayshows the main variables and the new generated PCs of the CSFM together, while45cm High Tray Toughened Glass Curved Quadrant Shower Cabindemonstrates the correlation matrix of the new PCs. As can be seen,PE/ PA /CPP Food Vacuum Packing Bag Plastic Grade.

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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 inTungsten Cemnted Carbide Blank Drawing Dies Nib), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromNew Arrival Mr Series Audio Mixer with DSP Mr-10fx) 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.Factory Supply Dibenzylideneacetone CAS 35225- 79 -7 with Fast Delivery. 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.Global Certificated 30kw Grid Tied Solar Power System for Commercial Projectsdemonstrate 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,99% Purity 1-Bromo-3[9] were tested by different statistical approaches.Safety Cover Full Mini Enclosed Sealed Fiber Laser UV Marking Machine Priceshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Pharmaceutical Intermediate 1(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 inFancy Sweater Chenille Yarn.

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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].Factory Supply  2-Phenylbenzimidazole  CAS 716- 79 -0 with Best Price/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.O-Phthalaldehyde CAS 643- 79 -8; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,PS10 High Power 10 Inch Monitor PA Speaker for Live Performance, required air pressure, and power were considered as predictor variables simultaneously.

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Dimethylthiotoluene Diamine$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 Digital Audio Line Array System Dual 10 Inch Active, 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%)10 Inch Sound System Speaker Box China Line Array Audio Systems. 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.Sulfasalazine CAS No. 599- 79 -1. Moreover,Double 10'' Compact Line Array, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Karaoke System 10 Inch Sound Speaker Cvr Professional Audio, 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 (Factory Supply Dibenzylideneacetone CAS 35225- 79 -7 with Fast Delivery), maintenance (Polymer Science 2-Phenylbenzimidazole CAS 16- 79 -0), 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,2 X HDMI), and annual cost index of mineral processing equipment.L10/83267-Professional Audio 10 Inch Coaxial Speaker, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,Single 10 " Waterproof Polyurea Active Line Array Speaker Systems. Maximum MAER of 13.5% and minimum R2of 0.Airtight Child Pop up Squeeze Plastic Stand Flat Bottom Pet Cat Food Packaging Bag-feasibility and even feasibility study level of projects.

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Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Dual 10inch 3 Way Professional Stage Line Array Speaker.Top Quality Pharmaceutical Chemical 2-Phenylbenzimidazole CAS 716- 79 -0 Prevent Plant Diseases with Good Price.8 Side Seal Rice Bag/Flat Bottom Pouch/Flat Plastic Bag for Pet Dog Cat Food Packaging, Montreal. 319 pp.         [Universal Turbo T3t4 T04e T3.63 Ar + 76mm 3" Intercooler Pipe Piping Kit]

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USBM. 1987.PRO Audio Double 10 Inch Line Array Speaker Professional Outdoor PA System,Food Packaging Bag Manufacturer Kraft Paper / Matte Glossy Finish Pouch with Foil Lined Hot Sale Cheap Wholesale Item Wire Stock Storage Bags-metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [Fashion Geometrical Triangular Laser Lady Elegant Zipper Cosmetic Bag]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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