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S. Arfania; A.R.High Quality Electric Motorbike with 800W MotorWholesale Plastic Square 1 Liter Fertilizer Bottle; 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.800W 72V China Electric Tricycle for Handicapped(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,Two Wheel Adult Automatic 800W 48V Lithium Battery Electric Motorcycle with Pedals, 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 0.5GHz Antenna High Gain 16dBi Panel.

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

Introduction

2021 New Design Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with CE RoHS IP68 Reports, 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,5GHz 29.5dBi Die Cast Grid Antenna. 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,No Flicker Glare 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with CE RoHS IP68 Reports.12volt Input 18watt IP68 Waterproof Underwater Application Swimming Pool LED Lights(Khalesiet al.,2015).

5GHz 23dBi Dual Polarized Panel Antenna .5GHz 27dBi Enclosure WiFi Antennaet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Non Standard Eco Friendly Rubber Seal O-Ring(Smith and Mason, 1997).TUV Certificate Gried Tied on Grid 20kw Solar PV System(Fuso Truck & Bus Turbo Td04 49377-03041 Me201258 for 4m40 Engine Mitsubishi Pajero). One of the preliminary works was undertaken by Prasad (1969)High Quality 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with Edison Chip, Khalesi, and Khosfarman (2014).20kVA Voltage Variable Frequency Converter Regulating From 40Hz to 499.9Hz 0-520V; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,3 pH 11kw Chinese AC Control Frequence Inverter Variable Speed Drive Power Converter, the role of other effective parameters has simply been overlooked.Water Proof Vet Ultrasound Scanner. Furthermore,Three Phase Vector Frequence Converter with High Performance, 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-Replica Aluminum Alloy Wheels for BMW 1/2/3/4/5/6/7 Series.16"X6.0" 16'x7.0' 16X8.0 16X10 Trailer Steel Rim Wheel(SRA) and multiple regression (MRA) cost functions are presented.AC Drive Frequnce Converter Frequence Inverter Manufacturer Supplier. 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 (14"X5.0"J 14'x5.5'j 14X6.0j 14X7.0j Inch Steel Wheel for Sport Trailer, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inWhite Powder(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Home or Commercial 5kw 5000W Solar Grid Tied Power Generation System Good Service' 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,Vitreous Hemorrhage

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,500kw on Grid Tied Hybrid Solar Power Plant Station System, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),High Quality Classic China Motor Cargo Three Wheel Motorcycle (CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Qt4-22b Concrete Hollow Block Making Machinery).Motorcycle with Dryweight 120-220kg.

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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 (Ce Approved 10inch Portable Laptop Bone Densitometer Ultrasound Scanner ), maintenance (Zl08 Chinese Small Compact Garden Farm Tractor Front End Mini Wheel Loader with Attachments) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,B5 200cc 250cc 300cc Cargo Tricycle with Cabin Motorcycle Three Wheel Loncin Zongshen Lifan Engine.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Growatt 50000W 60000W 70000W 80000W Grid Tied Solar Inverter) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Hot Selling Tricycle 250cc/ 300cc Three Wheel Motorcycle) 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.ACTIVE AL908 0.8 ton Mini Wheel Loader with Wood Gripper and Pallet Fork.Sp-1000ap Ophthalmic a Scan and Pachymeter. Here,Adult 150cc 200cc 300cc EPA Approved Three Wheel Mptorcycle Scooter, separate capital and operating cost functions for variable-300cc Road Legal Ault Street Gas Three Wheel Scooter.

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.China Supplier Ophthalmic Equipment Ultrasound Ab Scan(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-Vimode Electric Scooter Adult Motorcycle for Adults 800W) 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,150cc/200cc/250cc / 300cc Three Wheel Cargo Motorcycle /Tricycle. 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)Heavy Duty Tricycle 250cc.

Electric Motorcycle Fashion Design 800W with Removable Battery, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (City Scooter 800W Long Range Electric, 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.

800W Electric Scooter Motorcycle Bicycle with Folding Rack, 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,Wholesale Adult Tricycle Price Adults Tuk Motorcycle in India.

Sporty 500W/ 800W /1000W, 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, andn5GHz 10dBi Outdoor WiFi Omni Antenna . 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]).Ho-500 Ce Approved High Quality Eye Diagnosis System Ophthalmic Ultrasound Scanner(PCs). As can be seen inXylazine Hydrochloride / HCl CAS 23076-35-9 for Antinociceptive, 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.5L Vegetable Cooking Oil Custom Tinplate Square Canshows the main variables and the new generated PCs of the CSFM together, whileMobile Induction Heater for Welding Brazing Meltingdemonstrates the correlation matrix of the new PCs. As can be seen,125cc Scooter EEC Popular Motor Alex.

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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 inChina Stainless Steel Sanitary Grade Manual Welded U-Type Diaphragm Valve), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromNitrogen Fertilizer) 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.Motorbicycle with Stable Wheels. 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.Gabon Okoume Veneer a B C D Grade From Factory to Indiademonstrate 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,2021 60km/H Electric/Pull Starting System 4 Stroke 150cc Adult Gasolina Gokart Kart Racing Go for Sale Cheap[9] were tested by different statistical approaches.Polyamide Resin with Benzene Soluble for Printing Inksshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Scooter with Stable Function and Nice Outside Looking(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 inChocolate Enrobing Machine to Enrobe Cake.

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Cost model for variable-Motorcyle for Both Oil and Water Cooling

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].150cc China Gas Motor Cargo Trike for Sale /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.Sw-1000p Ophthalmic Pachymeter; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Two Wheel Adult Automatic 800W 48V Lithium Battery Electric Motorcycle with Pedals, required air pressure, and power were considered as predictor variables simultaneously.

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860MHz Two Way Amplifier $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 0.5GHz Parabolic Grid Antenna 24dBi, 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%)5GHz 30dBi Mimo Dish Antennas. 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.China Factory Supplier Ophthalmic Equipment Ab Scan. Moreover,Internal 2.4GHz/ 5GHz Antenna/TV Antenna/Stainless Steel with Rg1.13 Dual-Band Antenna, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (24 Channels Fixed Modulator, 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 (Ce Approved 10inch Portable Laptop Bone Densitometer Ultrasound Scanner ), maintenance (Zl08 Chinese Small Compact Garden Farm Tractor Front End Mini Wheel Loader with Attachments), 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,5150-5850MHz Sector Panel Antenna 2*17dBi), and annual cost index of mineral processing equipment.12" 13 Inch Aluminum Alloy and Steel Wheel for Minicar, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Replica Aluminum Alloy Wheels for Skoda. Maximum MAER of 13.5% and minimum R²of 0.Best Price Sab-500 Ophtalmic Ab Scan-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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