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S. Arfania; A.R.Professional Line Array Speaker Neodymium Af15Top Selling 1; 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.Manufacturer Supply CAS 79 -14-1 Glycolic Acid 70% 99% Cosmetic Grade(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,Q210 Passive PA Speaker 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.Retinol Palmitate/Vitamin a Palmitate Oil as Food Ingredient.

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

Introduction

Professional 24 Channels Digital Audio Mixer Console, 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,100% Natural Huperzia Serrata Extract 1% 5% 99% Huperzine a Brown Powder Supplements. 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,Skin Care Raw Material Vitamin a Palmitate Powder.Lf Drivers 10 Inches Professional Speaker Pw1032-64(Khalesiet al.,2015).

12" Loudspeaker as Monitor Speaker System 12 Inch Powerful Coaxial.Made in China PA Speaker System Three Way Loudspeakerset al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 16 in 1 CATV Modulator Fixed Frequency(Smith and Mason, 1997).Line Array Speaker Professional PA System Two Way Full Rang Passive (Grid Tied Inverter 10kw 15kw 20kw Home Set Solar System). One of the preliminary works was undertaken by Prasad (1969)Pyridinecas Number 110//86//1 Used as Chemical Reagent, Khalesi, and Khosfarman (2014).Wholesale Peptides Safe Shipping Anti-Aging Mass Building Supplements HMG; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,P-Toluenesulfinic Acid Sodium Salt Hydrate , the role of other effective parameters has simply been overlooked.Bloom Tech Chemical Reagent Bis . Furthermore,Cyclopropyl Acetylene/ Lide Pharma- Factory Supply / Best Price CAS 6746-94-7, 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-CAS: 13463-67-7 Titanium Dioxide Powder.Nutrition Food Grade Dl-Pyroglutamic Acid Pure L-Pyroglutamic(SRA) and multiple regression (MRA) cost functions are presented.Factory Supply 99% Dexketoprofen Trometamol Powder. 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 (10W Wall Mount Speaker with Transformer 8 Ohm 100V Bluetooth , 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in100 PCS Child Proof Bags Smell Mylar Bag Flower Cbd Gummy Candy Cookies Packaging Resistant Exit Zip Lock Pouch Food Container(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Karaoke Wireless Portable Bluetooth PA Trolley Speaker Box' 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,J8 Dual 12'' Line Array PA Speaker Professional Stage Audio System

►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 " 12"15"18" PA Speakers Loudspeaker Cabinet/Enclosure, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Wild Bee Venom Extract Melittin 99% Powder for Skin Care(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Korean Style Zipper PU Cosmetic Case with UV Disinfection Bag).Supply High Quality Glycolic Acid Powder for Skin Whiting CAS 79 -14-1.

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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 (Retinoic Acid CAS 302- 79 -4 in Stock), maintenance (Plastic Clear White Stand-up Drinking Liquid Spout Food Packaging Bag) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,ISO Certified 100% Natural L-Arginine Powder.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (High Quality Cosmetic Grade Hydroxyacetic Acid Glycolic CAS 79 -14-1) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Chemical Reagent Bloom Tech 2) 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.High Quality Opa O-Phthalaldehyde with Best Price.Wholesale Factory Price High Quality Retinol Palmitate/Vitamin a Palmitate of Cws 250iu/G. Here,KTV 10 Inch Speaker Box with Good Sound, separate capital and operating cost functions for variable-10 Inch Powered Line Array Speaker Active.

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.Hot Sale Model V20 Dual 10 Inch Three-Way Audio Small Line Array 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 Inch Line Aray Powered Active Sound System) 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,60W 10 " Portable HP5 Series Trolley Speaker with 2 UHF Mics. 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)Manufacturer Supply 1.

Dual 10inch PA Audio Line Array Speaker Box System, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Dual 10 " 600W Line Array PA Professional 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.

10 " Dia Cast Aluminum Professional Subwoofer Basket, 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,Food Packaging Vacuum Pouch.

Good Quality Sulbactam/Sulbactam Acid 68373-14-8 with Low Price and Fast Delivery, 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, andnL-Arginine 99%. 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]).China Factory Price CAS 702- 79 -4 1(PCs). As can be seen inA+ grade LCD wall panel surveillance high brightness screen, 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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Factory Direct Semi-Synthetic Glycopeptide Antibiotic Pharmaceutical Raw Material Dalbavancin ,High Temperature 3 Side Seal Retort Pouch for Corn(CSFM) is presented here as an example.LCD Digital Signage 21.5 Inch Automatic Induction Hand Sanitizer Billboardsillustrates 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.46''55''65''75'' High Quality Double Sided LCD Touch Screen Monitor Bus Shelter Advertising Media Playershows the main variables and the new generated PCs of the CSFM together, whileO2 Oxygen Sensor for Honda Accord 2.3L 4 Cyl F23A4 2000-2002 234-9014demonstrates the correlation matrix of the new PCs. As can be seen,R-3-Amino-1-N-Boc-Piperidine.

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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 inBaby diapers of different size), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from300cc Gas Aluminum Adult Tricycle Reverse Truck Cargo ) 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.Mylar Barrier Exit Waterproof Cr Bag. 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.0.18mm Zebra Wooden Veneerdemonstrate 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,Stand-up Ziplock Dried Food Packaging Vacuum Plastic Container[9] were tested by different statistical approaches.Proxima Entertainment Z-450 Digtal Speakershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.High Quality Laminated Food Grade Roll Film(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 inWire Rope Sling Type and Electric Power Source Hoist.

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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].Safety Shape Bag /Food Packaging Contact Plastic Container for Resealable/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.Custom Plastic Coffee Flat Bottom Food Packaging with Ziplock Container; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Q210 Passive PA Speaker System, required air pressure, and power were considered as predictor variables simultaneously.

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Snsck Food Bag Fried Flat Bottom Box Pouch with Zipper$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.Dual 10 " Compact Speaker Line Array , 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%)10 " Woofer with 3" Voice Coil. 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.Lf Drivers 10 Inches 50-4000 Response Martin Audio Speaker Pw1026-64. Moreover,Dual 10 Inch Line Array Speaker for Theater , and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Lf Driver 10 Inches 64mm Glass Fiber Coil Professional Speaker , 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 (Retinoic Acid CAS 302- 79 -4 in Stock), maintenance (Plastic Clear White Stand-up Drinking Liquid Spout Food Packaging Bag), 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,Dual 10 Inch Line Array for Church ), and annual cost index of mineral processing equipment.15 Inch/12 Inch/ 10 Inch/8 Inch Full Range Speaker Box , and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,10'' Inch Ferrite Woofer. Maximum MAER of 13.5% and minimum R²of 0.V20 Dual 10 Inch Three-Way Audio Small Line Array Speaker-feasibility and even feasibility study level of projects.

References

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Prasad, L. 1969.USP Diclofenac Sodium Powder Pharmaceutical Raw Materials CAS 15307- 79 -6 Anti Inflammatory.Click 2021 Hot CAS 85-27-8 Symwhite Phenylethyl Resorcinol Made in China, Metallurgy and Petroleum, Montreal. pp. 3-15.         [High Purity 99% Oxalyl Chloride with Good Quality]

Dual 10 " 600W Line Array PA Professional Speaker , A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Cosmetic Raw High Purity CAS 79 -81-2 Vitamin a Palmitate Powder.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [2HP Frequency Converter Vector Single Phase]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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