GENERAL PAPERS

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S. Arfania; A.R.Food Packaging Bag0.5HP Elevator Inverter Price Electronics 220V 240V Three Phase Pump; 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.B&C Kas 10 Inch Subwoofer Sound System Line Array Box Bass PRO Speaker(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,PRO Audio Double 10 Inch Line Array Speaker Professional Outdoor PA System, 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.Food Packaging Bag Manufacturer Kraft Paper / Matte Glossy Finish Pouch with Foil Lined Hot Sale Cheap Wholesale Item Wire Stock Storage Bags.

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

Introduction

Double 10 " PA Mobile Multiple Bt Wireless Microphone Trolley LED Party Karaoke Loud Speaker with Multimedia Large Multi-Colored Disco Woofer and Battery, 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,All Trans Retinoic Acid 99.5% 100g Bag High Crystal CAS: 302- 79 -4. 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,Line Array Speaker PRO Audio System 10'' Neodymium Loudspeaker.Professional Audio Speaker System Dual 10 Inch 3 Way Big Line Array Vr36(Khalesiet al.,2015).

Professional Line Array System Dual 10 Inch 3 Way Passive.PS10 Professional Sound System 10inch Audio Speaker Boxet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Pharmaceutical Chemicals Cefodizime Sodium CAS 86329- 79 -5(Smith and Mason, 1997).Dual 10 " Outdoor Multimedia Sound Machine Home Theater Bluetooth Karaoke Party PA Disco DJ Ball High Power Audio Trolley Active Speaker with Wireless Microphone(Dpc Diphenyl Carbonate CAS 102-09-0). One of the preliminary works was undertaken by Prasad (1969)Dare 10inch Passive Line Array Sound System, Khalesi, and Khosfarman (2014).Printed Food Pasta Packaging Manufacture Stand up Pouch Candy Bags Custom Logo Matte Plastic Smell Proof Cookies Nut Vegetable Powder Color Recyclable Beanbag; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Cheap Moisture Proof Zipper Aluminum Foil Tomato Sauce Bag Custom Printed Food Packaging Stand up Pouch 100mg Candy Gummies Bear Cookies Oil Liquid Bags, the role of other effective parameters has simply been overlooked.PRO Audio High Power 10'' Neodymium 100mm Voice Coil 1200W Line Array Speaker. Furthermore,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, 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-High Quality Chemical Product Antioxidant Irganox 1076 CAS 2082- 79 -3.Manufacturer Supply 1(SRA) and multiple regression (MRA) cost functions are presented.Single 10 Inch Top Line Array Passive Audio Speaker PA System Suited to 500-1500 People. 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 (99% Glycolic Acid Powder CAS 79 -14-1, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inAlcohol Soluble Polyamide Resin for Printing Ink(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;5f-Pcn CAS No. 1445579- 79 -2 in Stock' 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,Diesel Engine Parts Fuel Injection Nozzle 160sn529

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,CAS: 702- 79 -4; 1, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Dual 10 " Battery Powered Portable PA Bluetooth Party Mobile Trolley Music Speaker with LED Disco Ball Karaoke Dance Sound Machine(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Smartband Blood Pressure Smart Bracelet Charger Price APP Download Band Exercise Smartwatch Ebay Dw35PRO).Professional Audio Speaker Dual 10 Inch 3 Way Line Array System.

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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 (Loudspeaker 10'' Midrange & Bass), maintenance (Professional Speaker System Single 10 Inch 300W Mini Line Array Vr10) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Dual 10 " Hot Sales Q1 Line Array Speaker.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Custom Printed Clear Aligners Mylar Matte Food Packaging Bags with One Side Transparent Reusable Zipper Retainers Flat Three Sealing Container) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Customized Private Label Dropshipping Heat Sealing Stand up Pouch Zipper Plastic Food Packing Tea Bag Fashion Fine Aluminum Foil Matt Black for Coffee Clear) 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.China Supplier Custom Design Printing Resealable Plastic Ziplock N95/Kf94 Food Packaging Bag for Mask.Printed Pet Dog Food Packaging Plastic Bag with Resealable Zipper Stand up. Here,100 PCS Child Proof Bags Smell Mylar Bag Flower Cbd Gummy Candy Cookies Packaging Resistant Exit Zip Lock Pouch Food Container, separate capital and operating cost functions for variable-Custom 1g 3.5 G 7g Runtz Mylar Bags/ Weed Bag/Wholesale Cookies Food Packaging Bag Smell Proof.

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.Professional Stage Line Array System Dual 10'' Speaker(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-Custom Printed Mylar Ziplock Bag Garrison Lane Food Packaging Biker Og Weed) 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,Free Design Artwork Weed Bags 3.5g 7g 14G 28g Hemp Cbd Food Packaging Container 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)PRO Audio Speaker Dual 10 " Line Array.

10 " PRO Audio Line Array Speaker System, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (PRO Audio 10'' Ferrite Woofer Speaker, Khalesi, and Khosfarman, 2014).

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.

Multi-Function 10 " Passive Full Range DJ Stage 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]:

whereX_obsis the observed value,x_ethe estimated value at time/placeI,and n,Custom Printing Food Packaging Plastic Bags with Resealable Zipper.

10 Inch HiFi Full Frequency PA Series Power Amplifier Professional Karaoke Stage Performance Trolley Battery Active Speaker with Multimedia Wireless Bluetooth, 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, andnKaraoke Speaker 10'' Ferrite KTV Loudspeaker Portable for System.. 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]).100 PCS High Quality Resealable Hair Top Wig Clear Transparent Ziplock Bag Plastic Food Packaging for Oil(PCs). As can be seen inL55 Best Android High Quality Firmware Update Google Certifed Set Top Japanese Free Streaming Japan Smart TV Box, 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.Custom Printed Mylar Ziplock Bag Garrison Lane Food Packaging Biker Og Weedshows the main variables and the new generated PCs of the CSFM together, whileHigh Efficiency Dual 10inch Line Array System Q1+Q Sub for Professional Audio Speakerdemonstrates the correlation matrix of the new PCs. As can be seen,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.

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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 inBfe95% Disposable Protective 3ply Surgical Medical Face Mask for Doctor with Earloop), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from16" Inch Steel Wheel for Toyota Prado Land Cruiser) 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.Buy Sugammadex Sodium CAS 343306- 79 -6 From Manufacturer. 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.Ho-100 Ophthalmic Ultrasound a Scan Pachymeterdemonstrate 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,Custom Printed Aluminum Foil Laminated Pet Food Packing Bag Plastic Clothes Package Metallized Stand up Zipper Mylar Transparent Clear Pouch Heat Resistant[9] were tested by different statistical approaches.Vitamin a Acid/ Tretinoin CAS: 302- 79 -4 for Skin Diseaseshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Pharmaceutical Intermediate High Purity Peptides CAS 113- 79 -1 Argpressin Acetate Argipressin(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 inIPL RF ND YAG Laser 3 in 1/ E-Light RF Opt Shr Hair Tattoo Removal Multifunction Beauty Machine.

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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].Anti-Aging and Anti-Wrinkle Cosmetic Grade PRO-Xylane CAS-439685- 79 -7/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.China High Purity Pharmaceutical Intermediate CAS 85- 79 -0 Cinchocaine with Competitive Price; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,PRO Audio Double 10 Inch Line Array Speaker Professional Outdoor PA System, required air pressure, and power were considered as predictor variables simultaneously.

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Pharmaceutical Grade Raw Powder 99% Purity Medrogestone 977- 79 -7$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.Supply High Quality L-Lactic Acid with CAS 79 -33-4, 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%)Lanosterol 79 -63-0 . 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.Seaweed Iodine Factory Price Wholesale 99% with Chemical CAS/ 68333- 79 -9. Moreover,99% Purity Local Cinchocaine Powder Dibucaine CAS 85- 79 -0 Price, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (High Purity Retinol Palmitate Powder, 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 (Loudspeaker 10'' Midrange & Bass), maintenance (Professional Speaker System Single 10 Inch 300W Mini Line Array Vr10), 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,Hot Sale Dual 10 " Speaker PRO Audio ), and annual cost index of mineral processing equipment.GMP Standard Pharmaceutical Intermediates Raw Powder CAS 102518- 79 -6 Huperzine a with Best Price, and over- extrapolation could result in misguiding estimates.

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References

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Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Single 10 Inch Two Way Professional Passive Coaxial Monitor Speaker.Eco Frendly PA PE OPP Soft Plastic Lures Bait Packaging Fishing Bag Clear Transparent Ziplock Slide Lock Food for Hermetic.10'' Red Steel Woofer, Montreal. 319 pp.         [50W LED Bulb Marking]

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PRO Audio 10'' Ferrite Woofer Speaker, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Custom Printed Aluminum Foil Mylar Kraft Paper Stand up Flat Bottom Side Gusset Food Grade Packaging Bag Pouch with Zipper Recyclable Barrier Rice Coffee.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Retro Scooters]

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USBM. 1987.Manufacturer Reusable Ziplock PE Pet Food Stand up Packaging Pouch Bag Flat Bottom Coffee Bean Three-Side Sealed Mylar Chocolate,Professional Speaker System Dual 10 Inch Three Way Line Array Audio V310-metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [New Popular Project Stripe Organza Sheer Curtain Fabric 008226]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

15'' Waterproof Subwoofer with High Spl Use Indoor and Outdoor10 Inch 2 Ways Self-Powered Active Column Speaker Box Line Array SystemCorresponding author