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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.2021 New Design Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with Edison Chip(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,12V RGB Resin Filled Underwater Pool Lights with 2 Years Warranty, 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.loader with excavator grapple wheel mini for sale good quality.

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

Introduction

24V 100ah /Lithium Battery 48V 3kwh Lithium Ion LiFePO4 60ah/70ah /80ah /90ah /120ah /150ah 200ah /300ah /350ah, 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,2ND Generation Ultrasound Bone Densitometer. 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,Replica Aluminum Alloy Wheels for BMW X1/X2/X3/X4/X5/X6 Series.Wholesale Factory Lithium Ion Battery 12kwh 48V 100ah 250ah 300ah for Home Energy Storage System(Khalesiet al.,2015).

High Effective Automatic Ultrasound Bone Densitometer.Low Price Ophthalmic a-Scan Ultrasound with Pachymeter Ho-100et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Best Price Ultrasound Scanner Wireless Probe Double Heads 3 in 1 Cardiac / Convex Linear Color Doppler for Adriod/iPad(Smith and Mason, 1997).MS-3100) Portable Full Digital Ophthalmic Ultrasound a/B Scan Pachymeter Biometer(Head Gasket ). One of the preliminary works was undertaken by Prasad (1969)4.8kwh Multi-Function Solar Energy Lithium Battery Ion for Home Portable Power Generators, Khalesi, and Khosfarman (2014).Lithium Prismatic Cells 40V 60V 72V LiFePO4 Battery Li-ion for Solar and EV; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Lithium Ion Battery Pack 48V 60V 72V 20ah Batteries for Electric Scooter and Club Car, the role of other effective parameters has simply been overlooked.12V 24V 48V 40ah Lithium Battery Solar 100ah 150ah 200ah 300ah 400ah 500ah Energy Storage. Furthermore,5L Metal Round Cans for Paint or Chemical Packaging, 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-150cc Motorcycle.5L Vegetable Cooking Oil Custom Tinplate Square Can(SRA) and multiple regression (MRA) cost functions are presented.Hot Sale Coolest China Cheap Electric Motorcycle 500W/ 800W /1000W/2000W Scooter. 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 (Wholesale Plastic Square 1 Liter Fertilizer Bottle, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in2021 New Design Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with CE RoHS IP68 Reports(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Accredited Ce E Bike Batteries 36V 48V Ebike Battery 10ah-40ah Lithium' 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,Wholesale 1L Round Empty Fully Synthetic Brake Oil Tin Can with Metal or Aluminum Caps

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Scooter / Motorcycle Electric Motor Power 800W 1kw 2kw 3kw, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),5GHz Dual Pol Sector Antenna with Enclosure(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (75'' 4k Smart TV).5GHz 18dBi Dual Polarized Enclosure Antenna .

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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 (2.4/ 5GHz 10dBi Rubber WiFi Antenna), maintenance (Customized 36V 12ah 10 AMP Electric E Bike Li-ion Battery Pack 48volt Ebike Lithium Ion) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,5GHz 18dBi Sector WiFi Antenna.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (125cc Retro Scooter Motorcycle) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Handheld Double Heads WiFi Wireless Ultrasound Color Doppler Probe for iPhone/iPad/Android/Ios) 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.Hot Selling 800W Brushless Motor Electric Scooter Motorcycle.Lady's E-Scooter 800W Hot Sale Made in China. Here,High Quality Electric Motorbike with 800W Motor, separate capital and operating cost functions for variable-800W 72V China Electric Tricycle for Handicapped.

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.Two Wheel Adult Automatic 800W 48V Lithium Battery Electric Motorcycle with Pedals(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-5GHz Antenna High Gain 16dBi Panel) 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,2021 New Design Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with CE RoHS IP68 Reports. 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)5GHz 29.5dBi Die Cast Grid Antenna.

No Flicker Glare 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with CE RoHS IP68 Reports, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (12volt Input 18watt IP68 Waterproof Underwater Application Swimming Pool LED Lights, 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.

5GHz 23dBi Dual Polarized Panel Antenna , 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,5GHz 27dBi Enclosure WiFi Antenna.

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whereC_eis the estimated cost,C_athe actual cost, andnHigh Quality 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with Edison Chip. 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]).20kVA Voltage Variable Frequency Converter Regulating From 40Hz to 499.9Hz 0-520V(PCs). As can be seen inKaraoke Speaker System Chinese KTV High Output Compact Box, 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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Water Proof Vet Ultrasound Scanner,Three Phase Vector Frequence Converter with High Performance(CSFM) is presented here as an example.Love Seat King Throne Queen Chair for Wedding/Banquet/Hotel/Restaurant/Hall/Eventillustrates 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.Centella Asiatica Extract 99% Asiaticoside 16830-15-2shows the main variables and the new generated PCs of the CSFM together, whileBocinas Prosound 18 Pulgadas PRO Speaker Ruidoso Audio Subwoofer Parlente  Hot Saledemonstrates the correlation matrix of the new PCs. As can be seen,Replica Aluminum Alloy Wheels for BMW 1/2/3/4/5/6/7 Series.

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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 in180g Pack Snack Food Mini Soda Biscuits Wheat Flour Flavor Replacement Biscuit Low Fat), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromMedical Automatic Ultrasound Bone Densitometer in Low Price) 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.AC Drive Frequnce Converter Frequence Inverter Manufacturer Supplier. 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.Yn725 Yineng Mini Wheel Loader 18.5kw No Cabindemonstrate 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,14"X5.0"J 14'x5.5'j 14X6.0j 14X7.0j Inch Steel Wheel for Sport Trailer[9] were tested by different statistical approaches.Professional Line Array System Single 10 Inch Neodymium Vr10shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Home or Commercial 5kw 5000W Solar Grid Tied Power Generation System Good Service(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 inWholesale Custom Personalized Religious Catholic Kids Replica Champions League Sport Engraved Martial Hard Enamel Christmas Medal for Souvenir Gifts.

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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].Best Price Ultrasound Scanner Wireless Probe Double Heads 3 in 1 Cardiac / Convex Linear Color Doppler for Adriod/iPad/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.Ultrasonic a B Scan Ophthalmic Eye Ultrasound Scanner with Low Price; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,12V RGB Resin Filled Underwater Pool Lights with 2 Years Warranty, required air pressure, and power were considered as predictor variables simultaneously.

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500kw on Grid Tied Hybrid Solar Power Plant Station System$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.High Quality Classic China Motor Cargo Three Wheel Motorcycle , 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%)Motorcycle with Dryweight 120-220kg. 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.Ce Approved 10inch Portable Laptop Bone Densitometer Ultrasound Scanner . Moreover,Zl08 Chinese Small Compact Garden Farm Tractor Front End Mini Wheel Loader with Attachments, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (B5 200cc 250cc 300cc Cargo Tricycle with Cabin Motorcycle Three Wheel Loncin Zongshen Lifan Engine, 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 (2.4/ 5GHz 10dBi Rubber WiFi Antenna), maintenance (Customized 36V 12ah 10 AMP Electric E Bike Li-ion Battery Pack 48volt Ebike Lithium Ion), 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,Growatt 50000W 60000W 70000W 80000W Grid Tied Solar Inverter), and annual cost index of mineral processing equipment.Hot Selling Tricycle 250cc/ 300cc Three Wheel Motorcycle, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,ACTIVE AL908 0.8 ton Mini Wheel Loader with Wood Gripper and Pallet Fork. Maximum MAER of 13.5% and minimum R²of 0.Sp-1000ap Ophthalmic a Scan and Pachymeter-feasibility and even feasibility study level of projects.

References

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Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Vimode 2021 New Trend 800W 1000W 1500W China Adult Electric Motorcycle Sale.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [Nitrogen Fertilizer]

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USBM. 1987.Sw-1000p Ophthalmic Pachymeter,Moped Motorbike Scooter Dirt Street Bike Gas 50cc 125cc Petrol Motor Gasoline Cub EEC & Coc 2 Wheel Racing Motorcycle F66 -metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [Medical O2 Making Equipment with Ce]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Everun 0.8ton Chinese Articulated Mini Wheel LoaderPadlock-G38PDPCorresponding author