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PA Speaker Dual 12 Inch 3-Way PRO Audio Professional Line ArrayCost modelling for flotation machines

S. Arfania; A.R.Power Amplifiers PA Speaker System Amplifier 1000 WattL18 Tws Bluetooth V5.0 Stereo Music Earbuds Headset; 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.Wholesales Organic Intermediate 1(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,Audio J812 Loudsspeaker Line Array PA System Speaker Plan Three Way Dual 12 Inches PRO Sell, 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.Live/Installed Sound System PRO Speaker Box .

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

Introduction

Outdoor Double 6" Full Range Speakers 12" Active Subwoofer Professional Audiomini Live Bands System for Musician PA, 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,Professional Speaker with Laser Light . 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,XL-GF15 15-Inch 400W-800W Two-Way Two-Unit Full Frequency Professional Stage Equipment Speaker.Professional Multifunction Active Stage Speaker Wood Bt with Laser Lights(Khalesiet al.,2015).

L-812 Dual 12-Inch 2-Way 4-Unit Full Frequency Line Array Speaker.100% Safe Arriving Australia GB-B L 1.4 Butanediol Bdo 110-63-4et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for PA12 Natural Resin Transparent Granules Pellets Polyamide Price(Smith and Mason, 1997).High Purity Levamisole Manufacturer CAS 14769-73-4 with Best Price(Custom Printing Food Packaging Plastic Bags with Resealable Zipper). One of the preliminary works was undertaken by Prasad (1969)Free Sample Organic Chemicals 1, Khalesi, and Khosfarman (2014).High Quality Phena; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Manufacturer Supply Raw Material Levamisole Powder CAS 14769-73-4, the role of other effective parameters has simply been overlooked.18" Fane Style Aluminum Speaker Frame. Furthermore,18" Die Cast P-Auido Style Aluminum Frame, 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-Professional Stage Active Line Array Speaker with DSP.Single 18" Subwoofer Speaker Box(SRA) and multiple regression (MRA) cost functions are presented.Wholesales Veterinary Drugs Tiletamine HCl 14176-50-2 USA Warehouse. 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 (12" Professional Rcf Style Speaker Frame, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inAftermarket Hdy. Cyl Repair Kits for Cat Diggers/0965606(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Horn Professional Speaker H3' 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,Fast Delivery 1

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Professional Speaker Box F12+, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Df B&C Trees Speaker Subwoofer Audio Professional(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Black Friday New Year China Factory Eco-Friendly Compostable and Biodegradable Shipping Mailer Bag with As4736 As5810 Ok Compost Home Certfications).15'' Coaxial Speaker .

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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 (Customs Guaranteed 1), maintenance (China Factory Supply Ethylmagnesium Bromide CAS 925-90-6) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Ltk One 12" Woofers and 3" Driver Compact Coaxial Line Array Speaker.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Manufacturer Supply Bdo Novel Intermediate 1) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Tetracaina HCl Tetracaine Base Depuracao Segura Mercado 100% Brasileiro) 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.99% Pain Reliever Local Anesthetic Powder Tetracaine CAS 94-24-6.China Factoty Supply Levamisole HCl CAS16595-80-5 Hydrochloride Tetramisole. Here,400 Watt Portable Music Player Speaker Professional Audio, separate capital and operating cost functions for variable-Dual 6inch Loudspeaker for Coffee Room Restaurant Conference Speakers.

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.Dm 15 Inch PA Full Sound Systems Professional PRO 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-12inch KTV Bar PA Full Sound Speaker System Audio) 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,Dare Dual 8" Neodymium Active Line Array Set PA System. 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)12" Die Cast Aluminum PA Speaker Frame.

PA Speaker Dual 18" Subwoofer System, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (PA Speaker with Line Array Tweeter Horn , 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.

Active Mini Line Array Speaker with DSP Amplifier Module, 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,Quality Certified Product Ethyl 2-Phenylacetoacetate CAS: 5413-05-8 BMK Powder.

High Quality Karaoke Loudspeaker with B&C Compression Driver, 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, andn99% Tetracaine Hydrochloride/ HCl Powder CAS 136-47-0. 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]).Factory Supply BMK Powder Glycidate CAS: 5413-05-8(PCs). As can be seen in2021 Chemical Titanium Dioxide Pharmaceutical Intermediate CAS 13463-67-7, 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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Chinese Manufacturer Bulk Stock Pmk Intermediates16648-44-5 BMK White Powder,99.9% High Purity Prilocaine Hydrochloride/Prilocaine HCl CAS 1786-81-8(CSFM) is presented here as an example.5GHz Dual Polarization Enclosure WLAN Antennaillustrates 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.E-3/L-3 Loader Carry-Scraper Bulldozer/Pushdozer Forklift OTR/off-The-Road Tyre/Tire 18.00-25shows the main variables and the new generated PCs of the CSFM together, whileDiesel Engine Parts Fuel Injection Nozzle Dlla153p049demonstrates the correlation matrix of the new PCs. As can be seen,High Quality 4'-Hydroxyacetophenone CAS 99-93-4 4-Hydroxyacetophenone with Best Price.

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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 inLarge Size Wood Log Peeling Machine), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromSt 5kw Single Phase AC Electric Alternator Generator) 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 0.99% BMK White Powder Glycidate Bulk Sales CAS: 16648-44-5. 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.PC/Polycarbonate/GPPS/PMMA Sheet Extruder Machine/Plasticdemonstrate results for the machines modelled in this research.

Multiple regression results

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Cost model for variable-Quality Guaranteed BMK White Powder CAS: 16648-44-5 Glycidate

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].Hair Loss Treatment Acetyl Tetrapeptide-3/Capixyl CAS 827306-88-7 Purity Min 99% Powder/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.100% Passing The Customs Europe Free Shipping BMK Glycidate 16648-44-5; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Audio J812 Loudsspeaker Line Array PA System Speaker Plan Three Way Dual 12 Inches PRO Sell, required air pressure, and power were considered as predictor variables simultaneously.

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Portable 15inch PA Speaker F15+$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.Pharmaceutical Chemical CAS 236117-38-7, 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%)Speaker 12 Inch SA-212 Professional Sound Box Portable Passive. 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.Speaker Tcx- 10. Moreover,PA Woofer Speaker T- 10 12 15, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Passive Double 10 Inch Proal Audios Sound System Line Array Speakers for Direct Sale, 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 (Customs Guaranteed 1), maintenance (China Factory Supply Ethylmagnesium Bromide CAS 925-90-6), 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 10inch Professional PRO Audio Speaker System), and annual cost index of mineral processing equipment.10 " PRO Audio DJ Line Array Speaker Equipment System, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Wholesale Factory Price CAS: 16648-44-5 BMK Glycidate Powder. Maximum MAER of 13.5% and minimum R²of 0.Buy Real Pharmaceutical Intermediates BMK Glycidate Powder 16648-44-5-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Double End Single Side Acrylic Freestanding TubProfessional Line Array Speaker Neodymium Af15Corresponding author