GENERAL PAPERS

Frequency Converterlow Industrial Power InverterCost modelling for flotation machines

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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.Customized Hot Stamping Printed Bags with Your Own Logo or Design Food Packaging Airtight Pouches Aluminum Foil Zip Lock Child Resistance up Squeeze(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,Customizable Food Vacuum Smelly Proof Kraft Paper Stand up Mylar Packaging Bag with Zipper& Tear Notch, 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.Custom Liquid Stand up Pouch Spout for Food Packaging.

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

Introduction

ESD Shielding Anti Static Aluminum Foil Laminated LLDPE Bag for Electronic Parts /LED Lighting Packing, 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,Outdoor Dual 10 " Three Way Line Array Professional Audio Speaker 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,2021 New Compact 10 " Active Line Array Speaker Sound System.Waterproof Dual 10 " Three Way Line Array Professional Audio Speaker System(Khalesiet al.,2015).

PE Dog Food Pouch with Hole.Dual 10 Inch Line Array for Concert Live Service et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 10''stage professional Audio Speaker H- 10 for Stage(Smith and Mason, 1997).Professional Loudspeaker 10'' PRO Audio Speaker Passive Line Array System(5GHz 19dBi Enclosure WLAN Antenna). One of the preliminary works was undertaken by Prasad (1969)Double 10'' Compact Active Line Array, Khalesi, and Khosfarman (2014).CAS: 13553- 79 -2; Rifamycin S; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,PE/ PA /CPP Food Vacuum Packing Bag Plastic Grade, the role of other effective parameters has simply been overlooked.Fast Delivery CAS 525- 79 -1 6-Furfurylaminopurine 99% with Best Price. Furthermore,Factory Supply Dibenzylideneacetone CAS 35225- 79 -7 with Fast Delivery, 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-99% Purity 1-Bromo-3.Pharmaceutical Intermediate 1(SRA) and multiple regression (MRA) cost functions are presented.CAS 643- 79 -8 O-Phthalaldehyde / Phthalaldehyde with Best Price. 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 (Factory Supply  2-Phenylbenzimidazole  CAS 716- 79 -0 with Best Price, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inYog Motorcycle Spare Parts Magnetic Switch Assy Starter Relay for Cg125 Bros Nxr Honda Suzuki Akt 125 Akt110 Bws100 Gy6 Italika Kintaro YAMAHA Haojue(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;O-Phthalaldehyde CAS 643- 79 -8' 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,10 Inch Sound System Speaker Box China Line Array Audio Systems

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Sulfasalazine CAS No. 599- 79 -1, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Double 10'' Compact Line Array(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (2000L Fresh Milk Batch Pasteurizer).Karaoke System 10 Inch Sound Speaker Cvr Professional Audio.

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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 (2 X HDMI), maintenance (L10/83267-Professional Audio 10 Inch Coaxial Speaker) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Single 10 " Waterproof Polyurea Active Line Array Speaker Systems.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Airtight Child Pop up Squeeze Plastic Stand Flat Bottom Pet Cat Food Packaging Bag) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Two-Way Single 10 " Professional Waterproof 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.Professional 8 Mono+2 Stereo 10 Channel DSP Audio Mixer with 48V Phamton Power Supply.Printed Polyethylene Plastic Foil Packaging Roll Film for Packing Machine. Here,Q1 Dual 10'' Line Array System for Indoor Outdoor Stage Performance, separate capital and operating cost functions for variable-Recycle Stand up Pouch Zip Lock Dried Biodegradable Kraft Paper Bag Food Packaging Manufacturers.

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.Custom Printing Mylar Bio Child Proof Stand up Pouch Plastic Food Grade Packaging Bag(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-Kas Professional Dual 15 Inch Subwoofer 10 Line Array Speaker) 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 Printing Laminated Plastic Stand up Pouch Zip Lock Dried Biodegradable Kraft Paper Bag Food Packaging Mylar Manufacturers. 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)Cheap Stage Speaker Design for PA System 200W.

Pharmaceutical Raw Material CAS 15307- 79 -6 Diclofenac Sodium Powder, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Line Arrays Speaker Dual 10 Inch Powered Sound system, 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.

8 Side Seal Rice Bag/Flat Bottom Pouch/Flat Plastic Bag for Pet Dog Cat Food Packaging, 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,Dual 10inch 3 Way Professional Stage Line Array Speaker.

Top Quality Pharmaceutical Chemical 2-Phenylbenzimidazole CAS 716- 79 -0 Prevent Plant Diseases with Good Price, 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, andnPackaging Bag Customized Hot Stamping Printed Bags with Your Own Logo or Design MOQ 1. 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]).Electronic Component Using Anti-Static ESD Metal-in Shielding Bag Aluminum Foil Zip Lock Packaging Bags(PCs). As can be seen inCreative Caline Cp-09 Tuner Power Pedal Guitar, 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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Suking Hot Selling Chemical Product ,CAS 9005- 79 -2 Factory Price Cosmetic/Food Grade Aloe Vera Extract Bulk Glycogen Powder(CSFM) is presented here as an example.China AC Drive Frequency Inverter Manufacturer Supplierillustrates 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.High Purity 2shows the main variables and the new generated PCs of the CSFM together, whileCheap Price Fertilizer Ammonium Sulphate Blue Star 21%demonstrates the correlation matrix of the new PCs. As can be seen,Caine Benzocaine Procaine Cinchocaine Mepivacaine Pramoxine HCl Proparacaine CAS 94-09-7/51-05-8/614-39-1/61-12-1/85- 79 -0/22801-44-1/637-58-1/5875-06-9.

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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 inFreight Agent From China to Karachi Air Shipping Shanghai Czech Republic), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromFarwell P-Hydroxy Benzaldehyde with High Purity 99.5%) 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.Food Packaging 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.E-Scooter Electric Motorcycle Manufacture/Electric Adult off Road E-Motorcycle 800Wdemonstrate 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,B&C Kas 10 Inch Subwoofer Sound System Line Array Box Bass PRO Speaker[9] were tested by different statistical approaches.18watt Resin Filled Wall Mounted Swimming Pool Lamp with Two Years Warrantyshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.PRO Audio Double 10 Inch Line Array Speaker Professional Outdoor PA System(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 in56PA440 Plug and Socket.

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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].Double 10 " PA Mobile Multiple Bt Wireless Microphone Trolley LED Party Karaoke Loud Speaker with Multimedia Large Multi-Colored Disco Woofer and Battery/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.All Trans Retinoic Acid 99.5% 100g Bag High Crystal CAS: 302- 79 -4; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Customizable Food Vacuum Smelly Proof Kraft Paper Stand up Mylar Packaging Bag with Zipper& Tear Notch, required air pressure, and power were considered as predictor variables simultaneously.

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Professional Line Array System Dual 10 Inch 3 Way Passive$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.PS10 Professional Sound System 10inch Audio Speaker Box, 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%)Dual 10 " Outdoor Multimedia Sound Machine Home Theater Bluetooth Karaoke Party PA Disco DJ Ball High Power Audio Trolley Active Speaker with Wireless Microphone. 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.Dare 10inch Passive Line Array Sound System. Moreover,Printed Food Pasta Packaging Manufacture Stand up Pouch Candy Bags Custom Logo Matte Plastic Smell Proof Cookies Nut Vegetable Powder Color Recyclable Beanbag, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Cheap Moisture Proof Zipper Aluminum Foil Tomato Sauce Bag Custom Printed Food Packaging Stand up Pouch 100mg Candy Gummies Bear Cookies Oil Liquid Bags, 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 (2 X HDMI), maintenance (L10/83267-Professional Audio 10 Inch Coaxial 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,PRO Audio High Power 10'' Neodymium 100mm Voice Coil 1200W Line Array Speaker), and annual cost index of mineral processing equipment.Heat Seal Candy Snack Food Packaging Ny PE Pet Custom Plastic Stand up Pouch Doypack Free Design Rice Bottle Smell Proof Soft Touch Aluminum Vitamin Cookie Bag, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,High Quality Chemical Product Antioxidant Irganox 1076 CAS 2082- 79 -3. Maximum MAER of 13.5% and minimum R²of 0.Manufacturer Supply 1-feasibility and even feasibility study level of projects.

References

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Line Arrays Speaker Dual 10 Inch Powered Sound system, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Free Design Artwork Weed Bags 3.5g 7g 14G 28g Hemp Cbd Food Packaging Container Bag.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Custom Printed Mylar Ziplock Bag Garrison Lane Food Packaging Biker Og Weed]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Ho-100 Ophthalmic Ultrasound a Scan PachymeterVitamin a Acid/ Tretinoin CAS: 302- 79 -4 for Skin DiseaseCorresponding author