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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.Sulfasalazine CAS No. 599- 79 -1(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,Double 10'' Compact Line Array, 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.Karaoke System 10 Inch Sound Speaker Cvr Professional Audio.

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

Introduction

2 X HDMI, 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,L10/83267-Professional Audio 10 Inch Coaxial Speaker. 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,Single 10 " Waterproof Polyurea Active Line Array Speaker Systems.Airtight Child Pop up Squeeze Plastic Stand Flat Bottom Pet Cat Food Packaging Bag(Khalesiet al.,2015).

Two-Way Single 10 " Professional Waterproof Speaker.Professional 8 Mono+2 Stereo 10 Channel DSP Audio Mixer with 48V Phamton Power Supplyet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 1.5kw 1HP AC Frequency Inverter(Smith and Mason, 1997).Printed Polyethylene Plastic Foil Packaging Roll Film for Packing Machine(LG LD550DUN-TKB1 video wall system with matrix switcher). One of the preliminary works was undertaken by Prasad (1969)Q1 Dual 10'' Line Array System for Indoor Outdoor Stage Performance, Khalesi, and Khosfarman (2014).Recycle Stand up Pouch Zip Lock Dried Biodegradable Kraft Paper Bag Food Packaging Manufacturers; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Custom Printing Mylar Bio Child Proof Stand up Pouch Plastic Food Grade Packaging Bag, the role of other effective parameters has simply been overlooked.Kas Professional Dual 15 Inch Subwoofer 10 Line Array Speaker. Furthermore,Custom Printing Laminated Plastic Stand up Pouch Zip Lock Dried Biodegradable Kraft Paper Bag Food Packaging Mylar Manufacturers, 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-Cheap Stage Speaker Design for PA System 200W.Pharmaceutical Raw Material CAS 15307- 79 -6 Diclofenac Sodium Powder(SRA) and multiple regression (MRA) cost functions are presented.Line Arrays Speaker Dual 10 Inch Powered Sound system. 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 (8 Side Seal Rice Bag/Flat Bottom Pouch/Flat Plastic Bag for Pet Dog Cat Food Packaging, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inSamsung LTI550HN16 1920X1080P screen monitor LCD video wall(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Dual 10inch 3 Way Professional Stage Line Array Speaker' 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,Suking Hot Selling Chemical Product

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The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),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(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Shiny Rough Lusterless Polyester Fabric for Clothing).Pharma Intermediate Dibenzylideneacetone CAS 35225- 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 (Food Packaging Bag), maintenance (B&C Kas 10 Inch Subwoofer Sound System Line Array Box Bass PRO Speaker) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,PRO Audio Double 10 Inch Line Array Speaker Professional Outdoor PA System.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Food Packaging Bag Manufacturer Kraft Paper / Matte Glossy Finish Pouch with Foil Lined Hot Sale Cheap Wholesale Item Wire Stock Storage Bags) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Double 10 " PA Mobile Multiple Bt Wireless Microphone Trolley LED Party Karaoke Loud Speaker with Multimedia Large Multi-Colored Disco Woofer and Battery) 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.All Trans Retinoic Acid 99.5% 100g Bag High Crystal CAS: 302- 79 -4.Line Array Speaker PRO Audio System 10'' Neodymium Loudspeaker. Here,Professional Audio Speaker System Dual 10 Inch 3 Way Big Line Array Vr36, separate capital and operating cost functions for variable-Professional Line Array System Dual 10 Inch 3 Way Passive.

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.PS10 Professional Sound System 10inch Audio Speaker Box(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-Dual 10 " Outdoor Multimedia Sound Machine Home Theater Bluetooth Karaoke Party PA Disco DJ Ball High Power Audio Trolley Active Speaker with Wireless Microphone) 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,Dare 10inch Passive Line Array Sound System. 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)Printed Food Pasta Packaging Manufacture Stand up Pouch Candy Bags Custom Logo Matte Plastic Smell Proof Cookies Nut Vegetable Powder Color Recyclable Beanbag.

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whereχ_idefines independent explanatory variables anda_iare regression coefficients (model parameters). As was mentioned, independency ofx_ivariables 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.

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, 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]:

whereX_obsis the observed value,x_ethe estimated value at time/placeI,and n,High Quality Chemical Product Antioxidant Irganox 1076 CAS 2082- 79 -3.

Manufacturer Supply 1, 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).

whereC_eis the estimated cost,C_athe actual cost, andnSingle 10 Inch Top Line Array Passive Audio Speaker PA System Suited to 500-1500 People. 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]).99% Glycolic Acid Powder CAS 79 -14-1(PCs). As can be seen inHot Model 18W IP68 Cool White PC Resin Filled Wall Mounted Pool Lighting with Edison Chips, 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 andX_ias Equations [5] and [6]:

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In this research, main variables ofX₁, X₂... X_nwere 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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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.1380 Hot Selling Install 5kw on-Grid Solar Systems 12kw Grid- Tied Kit for Home Power Systemshows the main variables and the new generated PCs of the CSFM together, whilePortable 20Hz RF Face Lift Machinedemonstrates the correlation matrix of the new PCs. As can be seen,Sugar Fruit Salt Food Packaging Aluminum Foil Mylar Spice Bags Transparent Clear Stand up Zip Lock Resealable Beef Nuts Rice Coffee Cereal Tea Plastic Pouch.

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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)

whereX_iare main technical variables (like power or required air),a_iare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inSurveillance 600tvl IR waterproof Mini Dome CCTV Security Camera), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromX96 Air Amlogic S905X3 64-Bit Android 9.0 Ultra 4K 2g 16g Smart TV Box) 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.Diesel Engine Parts Fuel Injection Nozzle 160sn529. 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.Best Sale Bulk Price1demonstrate 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,CAS: 702- 79 -4; 1[9] were tested by different statistical approaches.Automaticall Switch 5kw 6kw Hybrid Solar System with Lithium Battery Backup and Tier 1 Panelsshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Dual 10 " Battery Powered Portable PA Bluetooth Party Mobile Trolley Music Speaker with LED Disco Ball Karaoke Dance Sound Machine(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 inStainless Steel Food Grade Clamp Manual Diaphragm Valve.

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Cost model for variable-Professional Audio Speaker Dual 10 Inch 3 Way Line Array System

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].Loudspeaker 10'' Midrange & Bass/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.Professional Speaker System Single 10 Inch 300W Mini Line Array Vr10; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Double 10'' Compact Line Array, required air pressure, and power were considered as predictor variables simultaneously.

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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.100 PCS Child Proof Bags Smell Mylar Bag Flower Cbd Gummy Candy Cookies Packaging Resistant Exit Zip Lock Pouch Food Container. Moreover,Custom 1g 3.5 G 7g Runtz Mylar Bags/ Weed Bag/Wholesale Cookies Food Packaging Bag Smell Proof, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Professional Stage Line Array System Dual 10'' Speaker, 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 (Food Packaging Bag), maintenance (B&C Kas 10 Inch Subwoofer Sound System Line Array Box Bass PRO Speaker), 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,Custom Printed Mylar Ziplock Bag Garrison Lane Food Packaging Biker Og Weed), and annual cost index of mineral processing equipment.Free Design Artwork Weed Bags 3.5g 7g 14G 28g Hemp Cbd Food Packaging Container Bag, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,PRO Audio Speaker Dual 10 " Line Array. Maximum MAER of 13.5% and minimum R²of 0.10 " PRO Audio Line Array Speaker System-feasibility and even feasibility study level of projects.

References

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Mular, A.L. 1982.Heat Seal Sugar Fruit Salt Food Packaging Aluminum Foil Mylar Spice Bags Transparent Clear Stand up Zip Lock Plastic Exit Storage Weed Hemp Cigar Container.Custom Cat Food Bags.Buy Sugammadex Sodium CAS 343306- 79 -6 From Manufacturer, Montreal. 265 pp.         [Three Wheel Motor Tricycle Rickshaw Rear Axle]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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