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S. Arfania; A.R.Raw Petro High Temperature Sapphire Pressure Transmitter6000W Single Phase Inverter Grid Tied Home Solar System; 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.Cheap Adult 150cc ATV Farm/Quad Bike 200cc for Sale(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,EEC Euro 5 Gy6 -125cc Motorcycle Scooters, 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.Gy6 Engine Gas Scooter.

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

Introduction

150cc 200cc Gy6 4 Wheel Chain/Shaft Drive Gas Powered Sport Quad Bike ATV, 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,Gy6 -50cc OEM Gas Scooter. 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,150cc off Road Utility ATV with Reverse .Commander 200cc ATV off-Road Quad China 150cc 180cc 110cc Kids(Khalesiet al.,2015).

Gy6 150cc Gasoline Scooter.Zongshen 150cc Cargo Tricycle with Top Coveret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 4 Kw China Frequency Converter Power Supply Motor Drive 3 Phase Inverter(Smith and Mason, 1997).Gy6 150cc Gas Scooter(EPDM 50 Duro As568 Rubber O Ring). One of the preliminary works was undertaken by Prasad (1969)150cc 5 Speeds Forwader ATV 4 Wheelers Farm , Khalesi, and Khosfarman (2014).150cc Gy6 Engine Automatic ATV Sports Quad Bike; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Hot Selling Electric Race Vietnam Motorcycle Tire , the role of other effective parameters has simply been overlooked.Gy6 150cc Gasoline Scooter. Furthermore,No Flicker Glare IP68 Resin Filled 18W 12V Surface Mounted LED Pool Lights for Intex Pools or Theme, 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-Gy6 -50cc Scooter.China 150cc Gy6 Gasoline Scooter(SRA) and multiple regression (MRA) cost functions are presented.Euro 4 Certificate. 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 (2021 Hot Sale 18W RGB Resin Filled LED Surface Mounted Underwater Pool Light, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inMetal Cans 0.925 Liter Tin Barrel for Packaging Container(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;High Quality 18W RGB Resin Filled LED Surface Mounted Underwater Pool Light' names:

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The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),300cc Five Wheel Gas Cargo 3 Motorcycle for Adults (CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Rectangle 100ml Cool Design Brand Perfume Bottle for Man).Portable Automatic Ultrasound Bone Analyzer Densitometer.

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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 (300cc New Classic Cheap Cargo Tricycle ), maintenance (Voomaster Brand Big Diamonds Tread Pattern Motorcycle Tyre 3.00- 17 ) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,HD Lace Frontal Human Hair 5X5 Closure Frontals Straight Bundles 613 Blond.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Ophthalmic Pachymeter ) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (6A Grade Indian Beard) 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.Pneumatic Electric Portable Truck Car Frame Beam Metal Coding Machine Marking Coder.50W LED Bulb Marking. Here,50W Fiber Laser Marking Machine for PVC/ Plastic/ Stainless Steel/ Silicon, separate capital and operating cost functions for variable-Flexible Label Laser Marking Machine for Airbag Warning Labels.

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.WiFi Wireless Ultrasound Linear Color Doppler USB 192 Elements Probe(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-Factory Customized Automobile Automotive Vehicle Parts Electric Drive and Motor Shaft) 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,Original Quality Motorcycle Parts Spark Plug Cap for Gy6 125. 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)30W Bird Rings Machine Laser Marker with Rotation Working Table.

Mini Handle Electric DOT Peen Marking Machine, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Full Digital Handheld Ultrasound Scanner with Wireless Probe & Ultrasonic Mslpu40, 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.

Pin Machine Suppliers Marker Systems, 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,USB&WiFi Ultrasound Convex Linear Probe for Ios/Android/Windows Device.

1L Rectangular Olive Oil Tin 1800ml Packaging with Imported Plastic Spout Guangdong, 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, andn1L Metal Resealable Selable Paint Tin Cans for Glue and Chemical Use. 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]).4u 16 in 1 Agile CATV RF Modulator Channels(PCs). As can be seen inHigh Quality Cheap 200cc and 150cc Farm Utility ATV, 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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Customized 1L Round Empty Metal Oil Paint Package Tin/Can Container,HDPE Pesticide Bottle 500ml 1L Foliar Fertilizer Plastic(CSFM) is presented here as an example.Construction Equipment Mini Wheel Loader with Quick Hitchillustrates 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.8in 8out Professional DSP Matrix Digital Audio Processors with Dp-0808date20shows the main variables and the new generated PCs of the CSFM together, whileMotorcycle Stator Coil/Magneto/Bobina Del Estator/Moto Partes/Repuestos Gy6 8coilsdemonstrates the correlation matrix of the new PCs. As can be seen,Cheap Price Electric Four Wheels Environment Protection Car for Adults.

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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 inLarger Lift Table), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromMini electric truck/ express vehicle/ Express vehicles) 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.Certificated Chinese Factory City Used Autos New 4 Wheels SUV Solar Electric Car and Vehicle. 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.20 Days Delivery! 100% Copper Wire Stc-3kw Three Phase Alternatordemonstrate 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,Softel CATV House Amplifier Gain Forward Max 30 dB with Return Path 5-65MHz[9] were tested by different statistical approaches.Motorcycle Plane Bearing Spare Parts for Gy6 125-Oumursshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Gain 30dB 1 Output CATV House User Amplifier with AGC(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 in75% Alcohol 150ml Instant Hand Sanitizer.

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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].Cummins diesel engine 4918416 inline 5 diagnostic tool datalink adapter/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.Solar Energy System 3kwh Power Home Built in Inverter; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,EEC Euro 5 Gy6 -125cc Motorcycle Scooters, required air pressure, and power were considered as predictor variables simultaneously.

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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.Motorcycle Scooter Rear Clutch Assembly for Gy6 -90 Engines. Moreover,Motorcycle Parts Speed Cable for Gy6 -150, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Powder Metallurgy Hot Press Sintering Furnace, 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 (300cc New Classic Cheap Cargo Tricycle ), maintenance (Voomaster Brand Big Diamonds Tread Pattern Motorcycle Tyre 3.00- 17 ), 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,Motorcycle Part Carburetor Cg125/Cg150/Jialing125/Jh125L/FT150/ Gy6 -125/CS125/Ds125/Ds150/FT125/150/Chopper /GS150/Gya-200 / Italika Tx-200), and annual cost index of mineral processing equipment.Cheap Popular Pattern 3.00-18 Motorcycle Tyre, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Strong Corrosion Resistance High Overload Pressure Sensor. Maximum MAER of 13.5% and minimum R²of 0.300cc Triciclo Con Cabina-feasibility and even feasibility study level of projects.

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Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Ophthalmic Ultrasonic Pachymeter and Biometer.2D Echo Color Doppler Ultrasound Scanner Diagnostic Equipment.High Quality Surface Mounted Swimming Pool Underwater LED Light with Edison Chip, Montreal. 319 pp.         [Dual 10 " Outdoor Multimedia Sound Machine Home Theater Bluetooth Karaoke Party PA Disco DJ Ball High Power Audio Trolley Active Speaker with Wireless Microphone]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.2021 New Arrival Malaysian Eyebrow.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [5GHz 10dBi Wideband Omni WLAN Antenna]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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