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Low Power Elevator Inverter 12kw with ControllerCost modelling for flotation machines

S. Arfania; A.R.New Arrival Mr Series Audio Mixer with DSP Mr-12fxFactory Design Logo Food Grade Colourful Printing Sealed Stand up Scented Tea Packaging Bag; 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.Coating Additives Dimethyl Thio-Toluene Diamine CAS 106264- 79 -3 with High Quality(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,Powered Speaker System for Home Theater, 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.Cosmetic Grade L-Arginine with High Quality.

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

Introduction

320000 Iu CAS127-47-9 Retinyl Vitamin a Acetate/Retinol Acetate, 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,Chinese Factory Special Cosmetic Raw Materials for Wrinkle Removal and Moisturizing High Purity Nano Liposomal Hydroxypropyl Tetrahydropyrantriol. 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,Best Quality Skin Care Pure Tretinoin 302- 79 -4.Factory Direct Sale Dimethyl Gonane 702- 79 -4(Khalesiet al.,2015).

Phthalaldehyde CAS 643- 79 -8.Chlorhexidine Diacetate CAS No 206986- 79 -0et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Wholesale Ammonium Sulphate with SGS and Coa Certificate(Smith and Mason, 1997).CAS 79 -14-1 Glycolic Acid 70%(IP68 Resin Filled Wall Mounted Swimming Pool Light with Two Years Warranty). One of the preliminary works was undertaken by Prasad (1969)Compact Neodymium Line Array 12inch 400W Passive Speaker PA System, Khalesi, and Khosfarman (2014).Professional 10 " Aluminum Speaker Basket; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,New Arrival Mr Series Audio Mixer with DSP Mr-10fx, the role of other effective parameters has simply been overlooked.Factory Price Powder Mannitol with High Quality. Furthermore,Outdoor Line Array PA System Loudspeaker, 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-Karaoke Wireless Portable Wooden Bluetooth PA Speaker.12" Line Array Loud Speaker Sound System Professional PA(SRA) and multiple regression (MRA) cost functions are presented.15inch Professional Stereo Sound PA PRO Audio DJ Loud Speaker. 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 (Professional Line Array PA System S1210 Sound, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inCummins diesel engine 4918416 inline 5 diagnostic tool datalink adapter(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Cosmetic Material 99% Purity Tretinoin Powder' 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,Best Price Medicine Grade Lanosterol Powder

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Outdoor Professional Audio Loudspeaker PA Stage Active 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),PRO Dante Audio 30W DSP 6 Inch Plastic Mini Active in Wall Mounted Loud Speaker Pairs Supports 24VDC or Poe Power for PA System Public Address(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (2021 The Best Copeland Scroll Zf33K4e-Twd- 551 Compressor for Chiller).Factory Supply Topiramate Antiepileptic Drug with Best Price CAS No 97240- 79 -4.

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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 (Cosmetic Grade L-Arginine with Best Price), maintenance (Anti-Wrinkle and Aging Chemical Raw Materials) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,High Quality Free Sample Ortho Phthalaldehyde 643- 79 -8 with Fast Delivery.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Waterproof Childproof Ziplock Valve Bag) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Professional Sound Speaker Single 8 Inch Portable Stage Monitor PS8r2) 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.Pharmaceutical CAS 5413-5-8 BMK Ethyl 2-Phenylacetoacetate.Factory Supply Hot Sale CAS No. 148- 79 -8 Thiabendazole Price. Here,L-Arginine Powder Amino Acid Pure Manufacturer, separate capital and operating cost functions for variable-White Powder Vitamin a for Food and Feed Grade.

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.Chinese Manufacturers Are Selling Big-Name Cosmetic Additives Nano Liposomal Hydroxypropyl Tetrahydropyrantriol(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-Professional Line Array Speaker Neodymium Af15) 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,Manufacturer Supply CAS 79 -14-1 Glycolic Acid 70% 99% Cosmetic Grade. 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)Q210 Passive PA Speaker System.

Retinol Palmitate/Vitamin a Palmitate Oil as Food Ingredient, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Professional 24 Channels Digital Audio Mixer Console, 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.

100% Natural Huperzia Serrata Extract 1% 5% 99% Huperzine a Brown Powder Supplements, 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,Skin Care Raw Material Vitamin a Palmitate Powder.

Lf Drivers 10 Inches Professional Speaker Pw1032-64, 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, andn12" Loudspeaker as Monitor Speaker System 12 Inch Powerful Coaxial. 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]).Made in China PA Speaker System Three Way Loudspeakers(PCs). As can be seen inChina 300cc Adult Road Legal 2 Seat Pedal Go Kart, 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.0.8 Ton Mini/Small Tractor Front End Wheel Loader with Hydraulic Forkliftshows the main variables and the new generated PCs of the CSFM together, while5HP 50Hz 60Hz 3.7kw 3 Phase VFD Variable Frequency Drive for Motordemonstrates the correlation matrix of the new PCs. As can be seen,P-Toluenesulfinic Acid Sodium Salt Hydrate .

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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 inEuropean Version 1200mm Biscuit Coating Machine Chocolate Enrobing), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromDiesel Fuel Injection Nozzle Dlla160pn141) 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.Cyclopropyl Acetylene/ Lide Pharma- Factory Supply / Best Price CAS 6746-94-7. 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.Cheap Price Speaker Wall Mount Bracket demonstrate 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,CAS: 13463-67-7 Titanium Dioxide Powder[9] were tested by different statistical approaches.Motor Electronic Power Frequency Converter 380V 2.2kwshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Nutrition Food Grade Dl-Pyroglutamic Acid Pure L-Pyroglutamic(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 inPrize Cup Glass Trophy Award.

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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].10W Wall Mount Speaker with Transformer 8 Ohm 100V Bluetooth /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.Karaoke Wireless Portable Bluetooth PA Trolley Speaker Box; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Powered Speaker System for Home Theater, required air pressure, and power were considered as predictor variables simultaneously.

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PRO Audio PA System Digital Mixer$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.Food Grade L-Arginine with Best Price, 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%)J8 Dual 12'' Line Array PA Speaker Professional Stage Audio System. 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.10 " 12"15"18" PA Speakers Loudspeaker Cabinet/Enclosure. Moreover,Wild Bee Venom Extract Melittin 99% Powder for Skin Care, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Supply High Quality Glycolic Acid Powder for Skin Whiting CAS 79 -14-1, 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 (Cosmetic Grade L-Arginine with Best Price), maintenance (Anti-Wrinkle and Aging Chemical Raw Materials), 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,Retinoic Acid CAS 302- 79 -4 in Stock), and annual cost index of mineral processing equipment.Plastic Clear White Stand-up Drinking Liquid Spout Food Packaging Bag, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,ISO Certified 100% Natural L-Arginine Powder. Maximum MAER of 13.5% and minimum R²of 0.High Quality Cosmetic Grade Hydroxyacetic Acid Glycolic CAS 79 -14-1-feasibility and even feasibility study level of projects.

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USBM. 1987.High Quality Laminated Food Grade Roll Film,D&B Style Dual 10 Inch Compact Line Array -metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [Logistics Service FedEx Express From China to Haiti]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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