GENERAL PAPERS

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S. Arfania; A.R.PRO Audio Double 10 Inch Line Array Speaker Professional Outdoor PA SystemDpc Diphenyl Carbonate CAS 102-09-0; 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.Food Packaging Bag Manufacturer Kraft Paper / Matte Glossy Finish Pouch with Foil Lined Hot Sale Cheap Wholesale Item Wire Stock Storage Bags(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 " PA Mobile Multiple Bt Wireless Microphone Trolley LED Party Karaoke Loud Speaker with Multimedia Large Multi-Colored Disco Woofer and Battery, 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.All Trans Retinoic Acid 99.5% 100g Bag High Crystal CAS: 302- 79 -4.

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

Introduction

Line Array Speaker PRO Audio System 10'' Neodymium Loudspeaker, 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,Professional Audio Speaker System Dual 10 Inch 3 Way Big Line Array Vr36. 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,Professional Line Array System Dual 10 Inch 3 Way Passive.PS10 Professional Sound System 10inch Audio Speaker Box(Khalesiet al.,2015).

Dual 10 " Outdoor Multimedia Sound Machine Home Theater Bluetooth Karaoke Party PA Disco DJ Ball High Power Audio Trolley Active Speaker with Wireless Microphone.Dare 10inch Passive Line Array Sound Systemet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for L5 Nylon Mining Loader OTR Tyre 20.5-25 off-The-Road Tire(Smith and Mason, 1997).Printed Food Pasta Packaging Manufacture Stand up Pouch Candy Bags Custom Logo Matte Plastic Smell Proof Cookies Nut Vegetable Powder Color Recyclable Beanbag(Alcohol Soluble Polyamide Resin for Printing Ink). One of the preliminary works was undertaken by Prasad (1969)Cheap Moisture Proof Zipper Aluminum Foil Tomato Sauce Bag Custom Printed Food Packaging Stand up Pouch 100mg Candy Gummies Bear Cookies Oil Liquid Bags, Khalesi, and Khosfarman (2014).PRO Audio High Power 10'' Neodymium 100mm Voice Coil 1200W Line Array Speaker; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,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, the role of other effective parameters has simply been overlooked.High Quality Chemical Product Antioxidant Irganox 1076 CAS 2082- 79 -3. Furthermore,Manufacturer Supply 1, 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-Single 10 Inch Top Line Array Passive Audio Speaker PA System Suited to 500-1500 People.99% Glycolic Acid Powder CAS 79 -14-1(SRA) and multiple regression (MRA) cost functions are presented.5f-Pcn CAS No. 1445579- 79 -2 in Stock. 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 (Ortho Phthalaldehyde CAS 643- 79 -8 O-Phthalaldehyde, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inYn725 Yineng Mini Wheel Loader 18.5kw Cabin(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Supply 99% Purity 3-Amino-4-Pyrazolecarboxamide Hemisulfate ' 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,Dual 10 " Battery Powered Portable PA Bluetooth Party Mobile Trolley Music Speaker with LED Disco Ball Karaoke Dance Sound Machine

►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 Audio Speaker Dual 10 Inch 3 Way Line Array System, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Loudspeaker 10'' Midrange & Bass(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Carbide Extrution Dies for Pressing Odmt Insert).Professional Speaker System Single 10 Inch 300W Mini Line Array Vr10.

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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 (Dual 10 " Hot Sales Q1 Line Array Speaker), maintenance (Custom Printed Clear Aligners Mylar Matte Food Packaging Bags with One Side Transparent Reusable Zipper Retainers Flat Three Sealing Container) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Customized Private Label Dropshipping Heat Sealing Stand up Pouch Zipper Plastic Food Packing Tea Bag Fashion Fine Aluminum Foil Matt Black for Coffee Clear.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (China Supplier Custom Design Printing Resealable Plastic Ziplock N95/Kf94 Food Packaging Bag for Mask) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Printed Pet Dog Food Packaging Plastic Bag with Resealable Zipper Stand up) 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.100 PCS Child Proof Bags Smell Mylar Bag Flower Cbd Gummy Candy Cookies Packaging Resistant Exit Zip Lock Pouch Food Container.Custom 1g 3.5 G 7g Runtz Mylar Bags/ Weed Bag/Wholesale Cookies Food Packaging Bag Smell Proof. Here,Professional Stage Line Array System Dual 10'' Speaker, separate capital and operating cost functions for variable-Custom Printed Mylar Ziplock Bag Garrison Lane Food Packaging Biker Og Weed.

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.Free Design Artwork Weed Bags 3.5g 7g 14G 28g Hemp Cbd Food Packaging Container Bag(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-PRO Audio Speaker Dual 10 " Line Array) 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,10 " PRO Audio Line Array Speaker 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)PRO Audio 10'' Ferrite Woofer Speaker.

Multi-Function 10 " Passive Full Range DJ Stage 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 (Custom Printing Food Packaging Plastic Bags with Resealable Zipper, 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.

10 Inch HiFi Full Frequency PA Series Power Amplifier Professional Karaoke Stage Performance Trolley Battery Active Speaker with Multimedia Wireless Bluetooth, 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,Karaoke Speaker 10'' Ferrite KTV Loudspeaker Portable for System..

100 PCS High Quality Resealable Hair Top Wig Clear Transparent Ziplock Bag Plastic Food Packaging for Oil, 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, andn8 Sides Sealed Aluminum Foil Bag Thickened Dog Food Packaging Tea Stand up Plastic Mylar Heat /Air/Water Resistant Container. 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]).Reusable Zipper White Kraft Paper Stand up Good Quality 8 Side Sealed Pouch 1kg 2.5kg Coffee Bag with Valve Aluminum Foil Mylar Plastic Food Packaging(PCs). As can be seen inChina Cpm Zl08 Mini Wheel Loaders with Price List for Sale, 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.High Efficiency Dual 10inch Line Array System Q1+Q Sub for Professional Audio Speakershows the main variables and the new generated PCs of the CSFM together, while10HP Three Phase Frequency Converterdemonstrates the correlation matrix of the new PCs. As can be seen,Buy Sugammadex Sodium CAS 343306- 79 -6 From Manufacturer.

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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 inUpscale Crystal Roses Brooch Fq-846320), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromSpeaker System High Power H3) 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.Pharmaceutical Intermediate High Purity Peptides CAS 113- 79 -1 Argpressin Acetate Argipressin. 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.Vitamin a Acid/ Tretinoin CAS: 302- 79 -4 for Skin Diseasedemonstrate results for the machines modelled in this research.

Multiple regression results

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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].High Quality 99% L-Pyroglutamic Acid /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

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Lanosterol 79 -63-0 $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.Seaweed Iodine Factory Price Wholesale 99% with Chemical CAS/ 68333- 79 -9, 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%)99% Purity Local Cinchocaine Powder Dibucaine CAS 85- 79 -0 Price. 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.High Purity Retinol Palmitate Powder. Moreover,Hot Sale Dual 10 " Speaker PRO Audio , and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (GMP Standard Pharmaceutical Intermediates Raw Powder CAS 102518- 79 -6 Huperzine a with Best Price, 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 (Dual 10 " Hot Sales Q1 Line Array Speaker), maintenance (Custom Printed Clear Aligners Mylar Matte Food Packaging Bags with One Side Transparent Reusable Zipper Retainers Flat Three Sealing Container), 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,Qige Factory Kinetin CAS 525- 79 -1 Plant Growth Hormone 6-Furfurylaminopurine 99%), and annual cost index of mineral processing equipment.China Factory Price Chlorhexidine Diacetate CAS 206986- 79 -0, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Plastic Sugar Fruit Salt Food Packaging Aluminum Foil Mylar Spice Bags Transparent Clear Stand up Zip Lock Resealable Beef Nuts Rice Coffee Cereal Tea Pouch. Maximum MAER of 13.5% and minimum R²of 0.Dual 10 Inch Rated Power 700 Watts Italian Neodymium Drivers Active Line Array System-feasibility and even feasibility study level of projects.

References

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Lashgari, A.Wholesale Matelized Bottom Gusset Stand up Barrier Exit Zipper Food Packaging Mylar Bag Custom Printing Colorful Aluminum Foil Laminated Plastic Container, A.R. 2013.Biodegradable 3 Side Sealed Food Vacuum Pack Transparent Plastic Bags Packaging for Frozen Ny/PE/OPP Sealer Cooler Bag,3X3 video wall LCD HD 1080P digital display screen,vol. 23. pp. 441-446.         [Cheap Hot Sale Beverage Plastic Bottle Milk with Aluminum Easy Open Lid]

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Mular, A.L. 1982.10'' Red Steel Woofer.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, Montreal. 265 pp.         [50W LED Bulb Marking]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Waterproof Outdoor Dual 10 " Line Array.Aluminum Foil Self Sealing Digital Plastic Packaging Bag Glossy Holographic Stand up Clear Front Laser Film Food with Zipper.Eco Frendly PA PE OPP Soft Plastic Lures Bait Packaging Fishing Bag Clear Transparent Ziplock Slide Lock Food for Hermetic, Montreal. 319 pp.         [Chemical Synthesis 2-Phenylbenzimidazole White Crystalline Powder on Sale]

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Noakes, M. and Lanz, T. 1993.PRO Audio Powered Line Array Tw- 10 Outdoor Speaker.Customized Label Plastic White Black Kraft Paper Pouch One Way Valve Roasted Bean Flat Bottom Coffee Bag Food Packaging Rice Pet Container, Carlton, victoria. 412 pp.         [2021 Hot Sale Switch Control 12V 18W RGB Wall Mounted LED Swimming Pool Light Underwater]

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Pascoe, R.D. 1992. Capital and operating costs of minerals engineering plants:Morin Professional Audio 10inch Line Array Speaker Tw- 10 & Tw-18 Sub.Minerals Engineering,vol. 5, no. 8. pp. 883-893.         [EEC Efi Racing Motorbike Motorcycles 125cc]

Prasad, L. 1969.Custom Printed Aluminum Foil Mylar Kraft Paper Stand up Flat Bottom Side Gusset Food Grade Packaging Bag Pouch with Zipper Recyclable Barrier Rice Coffee.Manufacturer Reusable Ziplock PE Pet Food Stand up Packaging Pouch Bag Flat Bottom Coffee Bean Three-Side Sealed Mylar Chocolate, Metallurgy and Petroleum, Montreal. pp. 3-15.         [Retro Scooters]

Custom Printing Food Packaging Plastic Bags with Resealable Zipper, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Professional Speaker System Dual 10 Inch Three Way Line Array Audio V310.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Glossy & Matte Plastic Flat Bag Three Side Sealing Aluminum Foil with Tear Notch &Ziplock Silver Food Packaging Pouch for Food&Hemp&Tea Smell Resistant]

Custom Printing Food Packaging Plastic Bags with Resealable Zipper, Ar., Lashgari, A., Fouladgar, M.M., and Skibniewski, M.J. 2012. Estimating capital and operational costs of backhoe shovels.Journal of Civil Engineering and Management,vol. 18, no. 3. pp 378-385.         [New Design High Quality Sexy Party Evening Dress]

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USBM. 1987.Passive RMS 700 Watts Dual 10 Inch Neodymium Line Array Speaker for Outdoor Show,Outdoor Speaker Dual 10 Inch Line Array-metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [Fashion Ladies Knitted Long Vest]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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