GENERAL PAPERS

Thin-film Sputtering Pressure Transmitter For Medical EquipmentCost modelling for flotation machines

S. Arfania; A.R.Professional Audio Speaker System Single 10 Inch Portable Mini Line Array Vr10RF Microneedle Thermal Facial Lift Beauty Equipment; 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.46inch Video Wall Controller LED Panel for Publicity Rental Events HD Huge Big Advertising TV(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,10'' Neodymium Woofer Professional Loudspeaker with Brown Cone., 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.PA 10 -25W 4 Inch Sound Ceiling Speaker.

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

Introduction

Runtz Packaging Mylar Ziplock Food Grade Plastic Zip Lock Bags Stand up Pouch Pet Custom Logo Bag, 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,Aluminum Foil Plastic Papacking Vacuum Puffed Food Bag. 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,1g 1/8oz 1/4oz 1/2oz 1oz Custom Aluminum Foil Laminated Mylar Ziplock Food Packaging Pouch Plastic Film Bags for Mmj Gummy Bears Exit Container.High bright Samsung 46" 49" 55" LCD video wall screen monitor(Khalesiet al.,2015).

Factory Sell 99% Purity Diclofenac Sodium Powder CAS 15307- 79 -6.43''46''55''65''75'' Commercial LCD Screen Display Full Color Waterproof Sunglight Readable Android Touch Monitor Kiosket al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Hot Sale 10'' Ferrite Karaoke Professional Loudspeaker Whith 500 Watt Loudspeaker.(Smith and Mason, 1997).Kraft Paper &Plastic Foil Laminated Mylar Food Packaging Container(CE Approved Wolf 0.8ton Bulldozer Mini Loader with Bucket). One of the preliminary works was undertaken by Prasad (1969)10 Inch Active Stage Monitor PA Audio Speaker System for Line Array Subwoofer Live Show , Khalesi, and Khosfarman (2014).Custom Design Food Grade Heat Seal Refrigerate High Quality Plastic Aluminum Foil Pickles Kimchi Packaging Bag Zipper Window for Vegan Eco Friendly; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Bloom Tech Chemical Reagent , the role of other effective parameters has simply been overlooked.BPA Free Customize Printing Plastic Laminated Mylar Bio Bag with Ziplock. Furthermore,Active Pharmaceutical Ingredient CAS 15307- 79 -6 Diclofenac Sodium, 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-Hair and Eyelash Growth Acetyl Tetrapeptide-3/Capixyl CAS 155149- 79 -4.High Quality Printed Food Packaging Doypack Aluminium Zipper Bags(SRA) and multiple regression (MRA) cost functions are presented.High Quality Argipressine CAS 113- 79 -1 with Best Price. 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 (1-Bromo-3, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inTransparent Nylon Grilamid PA -7290 Material a Kind of Amorphous PA12(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Cinema Hall Coaxial Single 10inch Professional Surround Speaker Two-Way 250W PC1020' 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 " Compact Speaker Line Array

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Factory Supply High Quality N-Cbz-D-Leucine Powder CAS. 28862- 79 -5 99% Purity, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Factory Supply Tretinoin / Retinoic Acid Vitamin a 302- 79 -4(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (3D Car Four Wheel Alignment A9/Tire Changer/Garage Equipment/Automotive Equipment/Wheel Balancer/Auto Maintenance/Wheel Machine Price/Wheel).Economic Mulifunctional Line Array System Speaker Dual 10 Inch.

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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 (Single 10inch Two Ways Professional Line Array Loudspeaker Bi AMP B&C Imported Driver with Vk10), maintenance (Professional Loudspeaker 10'' Neodymium Magnet) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Kas PRO Top 10inch Line Array Audio Speaker.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Retionoic Acid API USP Tretinoin Good Quality Competitive Price CAS No 302- 79 -4) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Dexketoprofen Trometamol Manufacturer CAS 156604- 79 -4 with Purity 99%) 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.Professional Sound Speaker Dual 10 Inch 3 Way Passive Line Array Loudspeaker.LG 46" 49" 55" DVI LED video panel for monitoring. Here,Retinoic Acid CAS No. 302- 79 -4, separate capital and operating cost functions for variable-Customized Printed 3.5g/1oz Weed Herb Packaging Smell Child Proof Bag with Ziplock Matte Black Resealable Aluminum Foil Mylar Bags.

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.Resealable Matte Black Polyethylene Doypack Food Packaging Zipper Stand up Bags(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-Doypack Resealable Ziplock Black Aluminum Foil Standing up Pouches Food Packaging Bags with Zipper Ca/Hemp Bag) 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,2-Way Speaker PS10 for High Quality Stage Monitor. 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)Professional Line Array Speaker Single 10 Inch Full Range System.

Aluminium Foil Zip Lock Food Packaging Bag Manufacturer Plastic, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Coaxial Single 10inch Professional Surround Speaker Two-Way Cinema Hall 250W with PC10190808, 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.

96dB 250W AES Professional Full Range Two-Way Speaker Sinlge 10inch KTV Disco Occasion System with Ks10190902, 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,Professional Line Array System Single 10 Inch Neodymium Vr10.

Samsung LTI550HN16 1920X1080P monitor LCD video wall, 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, andnMaunfacturing Price Sealed Food Packaging Vacuum Bag. 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]).Custom Printed Heat Seal Aluminum Plastic Cat Food Packaging Bag Child Resistant Mylar(PCs). As can be seen inHot Selling PP PE Masterbatch Yellow, 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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Wholesale Colorful Customize Printing Food Grade Water Proof Skin Patches Small Aluminum Foil Packing Bags with Zip Lock,10'' Ferrite Woofer Best Price Loudspeaker(CSFM) is presented here as an example.Mining Cement Stainless Steel 316L Protective Pressure Sensorillustrates 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.Plastic Customized Gift Zip Lock Garment Packaging Bag Composite Aluminum Foil Custom Food Packing Cookieshows the main variables and the new generated PCs of the CSFM together, whileOrtho Phthalaldehyde CAS 643- 79 -8 O-Phthalaldehydedemonstrates the correlation matrix of the new PCs. As can be seen,Android Advertising Player 46 Inch Ultra Thin Bezel LCD Video Wall LED Backlit E Paper Display.

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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 inFashion 925 Sterling Silver Hip Hop Jewelry Cubic Zirconia Iced out Rapper Letter Pendant Charms for Men), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromSolar Electric Motorcycle) 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.Vr36 Dual 10 Inch 3 Way Passive Compact Line Array. 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.Globally Popular Glycolic Acid CAS Nmber 79 -14-1 with a High Exposure Rate and Favorable Pricedemonstrate 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,Factory Supply Chlorhexidine Acetate/ Mpb Diacetate /CAS 206986- 79 -0[9] were tested by different statistical approaches.Mc4t-Branch Connector for Parallel Solar Panel Pair Male and Femaleshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Heat Sealing Embossed Plastic Vacuum Packaging Bag for Delicatessen(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 inKOCEL AJS 1800A Large Build Size 3DP Sand Mold 3D Printer with 1800*1100* 700mm Printing.

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Cost model for variable-Ceftriaxone Sodium 99% API CAS 104376- 79 -6 for Injection Grade

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].Pharmaceutical Powder Vitamin a Acid /Retinoic Acid/ Tretinoin for Skin CAS 302- 79 -4/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.Cosmetic Raw Material Powder CAS 20449- 79 -0 Pure Bee Venom/Melittin/Melitten; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,10'' Neodymium Woofer Professional Loudspeaker with Brown Cone., required air pressure, and power were considered as predictor variables simultaneously.

Pharmaceutical Chemicals Cefodizime Sodium CAS 86329- 79 -5. Moreover, the operating cost was detailed in different cost items.Hot Selling Ceftriaxone Sodium CAS 104376- 79 -6 Top Quality, indicated inChina Everun Er408t 800kg Earth-Moving Mini Front Wheel Loader for Sale, and major extrapolation should be avoided.

99% High Quality Nootropics Drugs Huperzine a 102518- 79 -6 Hupa USA Factory Fast Delivery$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.Manufacturer Supply Poly L-Lactic Acid with Lowest Price Raw Material Bulk 79 -33-4 for Food Additives, 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%)Crovell Factory Supply High Quality CAS 79 -57-2 Oxytetracycline. 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.Fast Delivery CAS 525- 79 -1 6-Furfurylaminopurine 99%. Moreover,Peptide Cosmetics CAS 155149- 79 -4 Capixyl, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (China O-Phthalaldehyde Opa CAS 643- 79 -8 Raw Crystal 643798 Supplier, 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 (Single 10inch Two Ways Professional Line Array Loudspeaker Bi AMP B&C Imported Driver with Vk10), maintenance (Professional Loudspeaker 10'' Neodymium Magnet), 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,100% Copper Wire St-1kw Single Phase Dynamo Factory Price), and annual cost index of mineral processing equipment.China Supplier Antioxidants Powder of Propyl Gallate CAS: 121- 79 -9, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,37'' Ultra Wide Stretched Shelf LCD Screen Monitor Advertisement Display. Maximum MAER of 13.5% and minimum R²of 0.49" 450nits LG panel advertising LCD screen -feasibility and even feasibility study level of projects.

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Mular, A.L. 1982.Samsung 55inch 3X3 Digital Signage Display Screen 3.5mm Narrow Bezel.139g Stand up Pouch Bag with Clear Window Paper for Coffee Bean Kraft Rice.Local Anesthetic Cinchocaine CAS85- 79 -0 for Pain Killer, Montreal. 265 pp.         [Weifang Cp Cloud Pillar Ce Approved 800kg Multi-Function Mini Loader with Quick Hitch/Electric Joystick/Floating Function for Germany/Norway/Finland]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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