GENERAL PAPERS

Retinol Palmitate/Vitamin a Palmitate Oil as Food IngredientCost modelling for flotation machines

S. Arfania; A.R.Hot Sale Model V20 Dual 10 Inch Three-Way Audio Small Line Array SpeakerBody Circumference Reduction RF Vacuum Fast Slimming System Beauty Apparatus; 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.Dual 10 Inch Line Aray Powered Active Sound System(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,60W 10 " Portable HP5 Series Trolley Speaker with 2 UHF Mics, 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.Manufacturer Supply 1.

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

Introduction

Dual 10inch PA Audio Line Array Speaker Box System, 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 10 " 600W Line Array PA Professional 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,10 " Dia Cast Aluminum Professional Subwoofer Basket.Food Packaging Vacuum Pouch(Khalesiet al.,2015).

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Methodology

Data

Thirty-seven major flotation machines (D&B Style Dual 10 Inch Compact Line Array , 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inTitan Brand 0.8 Ton High Quality Mini Wheel Loader with and Performance.(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Safety Shape Bag /Food Packaging Contact Plastic Container for Resealable' 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,10 " Woofer with 3" Voice Coil, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Lf Drivers 10 Inches 50-4000 Response Martin Audio Speaker Pw1026-64(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Model Qtf12-15 Big Scale Fly Ash Concrete Hollow Paving Brick Manufacturing Conrete Making Machine.).Dual 10 Inch Line Array Speaker for Theater .

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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 (Lf Driver 10 Inches 64mm Glass Fiber Coil Professional Speaker ), maintenance (Dual 10 Inch Line Array for Church ) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,15 Inch/12 Inch/ 10 Inch/8 Inch Full Range Speaker Box .076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

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

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.Dual 10 " Compact Professional Line Array (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 Kraft Paper Flexible Food Packaging Flat Bottom Bag-100gr) 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 Water Proof Child Resistant Food Grade Plastic Aluminum Laminated Stand up 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)Hot Sale Vacuum Bag Nylon Material for Agricultural Products.

Buy 99% Retinoic Acid Powder Vitamin a Tretinoin Retinol for Cosmetic, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Bio-Degradable Brown Kraft Food Packaging Bag, 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.

Child Resistant Waterproof Plastic Bag with Zipper, 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,Kraft Paper LDPE Supermarket Vegetable Cosmetic Fruit Packaging Bag.

Fried Chicken Sweet Chili Sauce Food Packaging, 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, andnGravure Printed Anti Static Bags ESD Shielding Anti-Static Bag APET/CPP APET/PE Moisture Proof Sntistatic Bag  /ESD Bag/Aluminium Foil Bag/Antistatic. 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]).Kraft Paper Flat Bottom Bag with Ziplock(PCs). As can be seen inFull Digital Handheld Ultrasound Scanner with Wireless Probe & Ultrasonic Mslpu40, 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.Yanmar Fuel Shutdown Solenoid 1503es-12s5suc12sshows the main variables and the new generated PCs of the CSFM together, while4WD Wheel Loader Manufacture Small Radlader 1.0 Ton Mini780demonstrates the correlation matrix of the new PCs. As can be seen,99% Pure CAS 56-95-1 Bulk Chlorhexidine Diacetate/Acetate Powder.

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Spts

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 inZh-1050g Bottom Lock Corrugated Box Folder Gluer Machine), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from250cc Motor Cabin Tricycle Cargo with Canopy) 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.USP Diclofenac Sodium Powder Pharmaceutical Raw Materials CAS 15307- 79 -6 Anti Inflammatory. 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.Dust Proof Steel Shackle Padlocks with Master Keydemonstrate 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,Click 2021 Hot CAS 85-27-8 Symwhite Phenylethyl Resorcinol Made in China[9] were tested by different statistical approaches.High Purity 99% Oxalyl Chloride with Good Qualityshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Cosmetic Raw High Purity CAS 79 -81-2 Vitamin a Palmitate Powder(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 inFabric and plastic awning with prints beautiful design children's umbrella.

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Cost model for variable-10'' Inch Ferrite Woofer

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 Oxytetracycline CAS 79 -57-2 with a Exposure Rate and The Latest Date of Production/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.10'' Ferrite Woofer; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,60W 10 " Portable HP5 Series Trolley Speaker with 2 UHF Mics, 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.Mylar Custom Printing Barrier Exit Bag. Moreover,10 Inch Coaxial Speaker Professional Driver 250wrms " Line Array Church Sound Equipment, 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, 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 (Lf Driver 10 Inches 64mm Glass Fiber Coil Professional Speaker ), maintenance (Dual 10 Inch Line Array for Church ), 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,Professional Dual 10 " 3-Way Tri-AMP Line Array Speaker), and annual cost index of mineral processing equipment.Manufacturer Supply 1, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Dual 10inch Powerful Line Array Speaker Ds210 Professional. Maximum MAER of 13.5% and minimum R²of 0.Feiyang/Temeisheng 10 Inch Professional DJ Wooden Speaker Audio Gd10-02-feasibility and even feasibility study level of projects.

References

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Khalesi, M. R., Zarei, M. J.,Hot Sale Model V20 Dual 10 Inch Three-Way Audio Small Line Array Speaker, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Supply Rubber Accelerator Mbt 2-Mercaptobenzothiazole CAS No.: 149-30-4.Minerals Engineering,vol. 81. pp. 103-108.         [IGBT Induction Heater Heating Equipment for Metal Surface ]

Kim, G.H., An, S.H., and Kang, K.I. 2004.High Quality Vitamin B5 Pantothenic Acid Powder Manufacturer with Bulk Shipment, neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [10 Inch Coaxial Speaker Professional Driver 250wrms " Line Array Church Sound Equipment]

Lashgari, A.10xt High-End PRO Audio Stage Monitor 10 Inch Coaxial Speaker Box, A.R. 2013.Pharmaceutical Intermediate 1,2-Phenylbenzimidazole|716- 79 -0 99% High Purity,vol. 23. pp. 441-446.         [Industry Tractor Tyre Inner Tube]

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Mular, A.L. 1982.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.Pharmavceutical Grade 2-Phenylbenzimidazole CAS 716- 79 -0 with Good Price, Montreal. 265 pp.         [Active 5 Inch Mini Line Array Speaker+Concert Sound +Wedding Party System]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.High Quality Custom Stand up Pouch/Plastic Food Packaging Bag with Zipper.Sell Well Opa.Pharmavceutical Grade 2-Phenylbenzimidazole CAS 716- 79 -0 with Good Price, Montreal. 319 pp.         [N]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Best Price O-Phthalaldehyde.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [Powerful PRO Audio 2 Way Full Range DSP Powered Line Array Speaker]

Noakes, M. and Lanz, T. 1993.Good Quality Powder CAS 56377- 79 -8 Nosiheptide with Best Price.Guarantee Lowest Price 2-Phenylbenzimidazole CAS 716- 79 -0 in Hot Selling Fungicide, Carlton, victoria. 412 pp.         [AC Drive Solar Pump Inverter 220V 380V Three Phase Inverters]

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Bio-Degradable Brown Kraft Food Packaging Bag, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Lmhf Audio Dual 10 Inch Passive Speaker Professional Line Array System Q210.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Closed Motorized China Cargo Tricycle with Box ]

Bio-Degradable Brown Kraft Food Packaging Bag, 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.         [1' Zinc Cam Buckle 680kg]

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Smith, A.E. and Mason, A.K. 1997. Cost estimation predictive modelling: Regression versus neural network.The Engineering Economist,vol. 42, no. 2. pp. 137-161.         [High Quality 1.2ton Loading Compact Loader Hr912 with Snow Bucket]

Stebbins, S.A. 1987. Cost estimation handbook for small placer mines.Information Circular9170, 94. US Bureau of Mines.         [LDPE Plastic Pellet 30% Black Pigment Color Masterbatch]

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USBM. 1987.10 Inch 2 Ways Self-Powered Active Column Speaker Box Line Array System,Two-Way Passive Line Array -metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [Woma New Design Whirlpool Corner Glass Two Persons Massage Bathtub]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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