GENERAL PAPERS

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S. Arfania; A.R.10 Inch Powered Line Array Speaker ActivePortable 15inch PA Speaker F15+; 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.Hot Sale Model V20 Dual 10 Inch Three-Way Audio Small Line Array 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,Dual 10 Inch Line Aray Powered Active Sound 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 0.60W 10 " Portable HP5 Series Trolley Speaker with 2 UHF Mics.

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

Introduction

Manufacturer Supply 1, 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,Dual 10inch PA Audio Line Array Speaker Box System. 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,Dual 10 " 600W Line Array PA Professional Speaker .10 " Dia Cast Aluminum Professional Subwoofer Basket(Khalesiet al.,2015).

Food Packaging Vacuum Pouch.Good Quality Sulbactam/Sulbactam Acid 68373-14-8 with Low Price and Fast Deliveryet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Vimode 2021 New Trend 800W 1000W 1500W China Adult Electric Motorcycle Sale(Smith and Mason, 1997).L-Arginine 99%(Double 12'' Line Array Audio). One of the preliminary works was undertaken by Prasad (1969)China Factory Price CAS 702- 79 -4 1, Khalesi, and Khosfarman (2014).CPP High Temperature Vacuum Retort Pouch; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Factory Direct Semi-Synthetic Glycopeptide Antibiotic Pharmaceutical Raw Material Dalbavancin , the role of other effective parameters has simply been overlooked.High Temperature 3 Side Seal Retort Pouch for Corn. Furthermore,R-3-Amino-1-N-Boc-Piperidine, 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-ISO Certified 100% Natural L-Arginine Powder.Mylar Barrier Exit Waterproof Cr Bag(SRA) and multiple regression (MRA) cost functions are presented.Stand-up Ziplock Dried Food Packaging Vacuum Plastic Container. 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 (High Quality Laminated Food Grade Roll Film, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inVirgin PA12 Resin GF20 GF30 Pellets(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;D&B Style Dual 10 Inch Compact Line Array ' 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,Snsck Food Bag Fried Flat Bottom Box Pouch with Zipper

►Standard 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 , blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),10 " Woofer with 3" Voice Coil(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Sinocharm Brc-a Approved IQF Plum Dice Frozen).Lf Drivers 10 Inches 50-4000 Response Martin Audio Speaker Pw1026-64.

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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 Inch Line Array Speaker for Theater ), maintenance (Lf Driver 10 Inches 64mm Glass Fiber Coil Professional Speaker ) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Dual 10 Inch Line Array for Church .076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (15 Inch/12 Inch/ 10 Inch/8 Inch Full Range Speaker Box ) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (10'' Inch Ferrite Woofer) 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.V20 Dual 10 Inch Three-Way Audio Small Line Array Speaker.Q1 Dual 10 " Line Array System. Here,D&B Style Dual 10 " Compact Line Array , separate capital and operating cost functions for variable-New Tw Audio Vera36 Dual 10 " Line Array Speaker System.

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 Line Array Vtx V20 Dual 10 Inch Three Way 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-Dual 10 " Compact Professional 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,Custom Kraft Paper Flexible Food Packaging Flat Bottom Bag-100gr. 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)Custom Water Proof Child Resistant Food Grade Plastic Aluminum Laminated Stand up Container Bag.

Hot Sale Vacuum Bag Nylon Material for Agricultural Products, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Buy 99% Retinoic Acid Powder Vitamin a Tretinoin Retinol for Cosmetic, 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.

Bio-Degradable Brown Kraft Food Packaging 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,Child Resistant Waterproof Plastic Bag with Zipper.

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whereC_eis the estimated cost,C_athe actual cost, andnFried Chicken Sweet Chili Sauce Food Packaging. 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]).Gravure Printed Anti Static Bags ESD Shielding Anti-Static Bag APET/CPP APET/PE Moisture Proof Sntistatic Bag  /ESD Bag/Aluminium Foil Bag/Antistatic(PCs). As can be seen inFast Delivery High Purity Benzaldehyde 100-52-7, 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.30W PA Active Computer 5.1 System Inexpensive Speakershows the main variables and the new generated PCs of the CSFM together, whileOTR G2 Grader Tubeless Tyre 17.5-25demonstrates the correlation matrix of the new PCs. As can be seen,99 Purity Peptides Oxytocin Injection Acetate 2mg.

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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 inPrice of Concrete Block Machine), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromFactory Wholesale Direct Sale Bicycle Folding Mountain Bike 26 Inch Variable Speed Double Shock Absorber) 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.Lf Driver 10 Inches 63.5mm Kapton Coil Professional Speaker . 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.280mm Magnetdemonstrate 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,USP Diclofenac Sodium Powder Pharmaceutical Raw Materials CAS 15307- 79 -6 Anti Inflammatory[9] were tested by different statistical approaches.China Wholesale 110/90-16 High Quality Motorcycle Tyre/Tireshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Click 2021 Hot CAS 85-27-8 Symwhite Phenylethyl Resorcinol Made in China(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 inBusiness 17 "Laptop Backpack Large Capacity with USB Multi-Functional Student Waterproof Travel.

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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].10'' Inch Ferrite Woofer/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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D&B Style Dual 10 " Professional Speaker Line Array $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.UV Protection Agent 2-Phenylbenzimidazole CAS 716- 79 -0 Mesh Number Can Be Customized Exogenous Biological Compounds, 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%)Line Array 10 Inchneodymiun PRO Audio Woofer. 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.Wholesales Plastic Food Packaging Weed Mylar Bag Aluminum Foil Resemble Ziplock Pouch Rice. Moreover,Mylar Custom Printing Barrier Exit Bag, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (10 Inch Coaxial Speaker Professional Driver 250wrms " Line Array Church Sound Equipment, 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 Inch Line Array Speaker for Theater ), maintenance (Lf Driver 10 Inches 64mm Glass Fiber Coil Professional 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,10 Inch Coaxial Speaker Professional Driver 250wrms Line Array), and annual cost index of mineral processing equipment.Professional Dual 10 " 3-Way Tri-AMP Line Array Speaker, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Manufacturer Supply 1. Maximum MAER of 13.5% and minimum R²of 0.Dual 10inch Powerful Line Array Speaker Ds210 Professional-feasibility and even feasibility study level of projects.

References

Camm, T.W. 1994.Feiyang/Temeisheng 10 Inch Professional DJ Wooden Speaker Audio Gd10-02.Neodymium Double 10 Inch DSP Active Professional Powered Line Array Speaker,vol. 46, no.6. pp. 559-562.         [Generator Automatic Controller Eim 258 -9754 Engine Interface Module]

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Kaiser, H.F. 1960. The application of electronic computers to factor analysis.Educational and Psychological Measurement,vol. 20. pp. 141-151.         [Hot Sale Motorcycle with 150cc Gy6 Engine]

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Kim, G.H., An, S.H., and Kang, K.I. 2004.Supply Rubber Accelerator Mbt 2-Mercaptobenzothiazole CAS No.: 149-30-4, neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [Direct Injection Water Cooled Diesel Engine for Generator Set]

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Mular, A.L. 1982.High Quality 1.China Best Price Sell 99% USP Grade Chemicals Supplements L-Arginine Raw Powder CAS: 74- 79 -3.New Products Factory Price Supply CAS 71277- 79 -7 Disodium Glycyrrhizate in Hot Sale, Montreal. 265 pp.         [Portable Eiminate Cellulite Jaw Lifting RF Vacuum Apparatus]

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Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Sell Well Opa.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [Active Mini Line Array Speaker with DSP Amplifier Module]

Noakes, M. and Lanz, T. 1993.Best Price O-Phthalaldehyde.Good Quality Powder CAS 56377- 79 -8 Nosiheptide with Best Price, Carlton, victoria. 412 pp.         [Camping Power / RV LiFePO4 Energy Storage Portable Generator 3.8kwh 80A 220V AC Output Enjoys 2 Years Warranty]

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Prasad, L. 1969.High Quality Coffee /Candy/Weed Plastic Container.Q1 Professional Line Array Loudspeaker Double 10 Inch Two-Way PRO Audio, Metallurgy and Petroleum, Montreal. pp. 3-15.         [Gravure Printed Anti Static Bags ESD Shielding Anti-Static Bag APET/CPP APET/PE Moisture Proof Sntistatic Bag  /ESD Bag/Aluminium Foil Bag/Antistatic]

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USBM. 1987.Lmhf Audio Dual 10 Inch Passive Speaker Professional Line Array System Q210,10 Inch 2 Ways Self-Powered Active Column Speaker Box Line Array System-metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [Waterproof Case for Samsung Galaxy S3 I9300]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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