GENERAL PAPERS

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S. Arfania; A.R.Tycorun Solar DC to AC Inverter 3kw/4kw/5kw/6kw on Grid Tied Single Phase for HomeDust Collector Machine Wood; 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.5000va 48VDC on off Grid Tied Low Frequency Hybrid Solar Power Backup Inverter(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,Eougem Mini 0.8 Ton Front End Loader of Good Quality 25kw, 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.Grid Tied Microinverter 1200W Waterproof Pure Sine Wave with WiFi Monitoring.

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

Introduction

Hot Sale Android 9.0 4K HD IPTV Set Top Box Amlogic S905W 2GB 16GB Smart Internet TV, 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,Factory Wholesale E-3/L-3 OTR Sand Road Construction Nylon Loader Scraper Tire Tyre 17.5-25. 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,25KW Ground Mini loader price.Growatt 80kw 70kw 60kw 50kw Grid Tied Solar Inverter Max 80ktl3 LV Three Phase for Commercial 1MW System(Khalesiet al.,2015).

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Methodology

Data

Thirty-seven major flotation machines (Factory Sale Big Pickup Tricycle with 300cc Water Cooled Engine, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inLine Array 10'' Neodymiun PRO Audio Woofer(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;AC12V RGB Mini PC Resin Filled Wall Mounted LED Swimming 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),4GB32GB 4K Android TV Box Digital Display T95X2 with Amlogic S905X2 Internet Quad Core CPU Media(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Tsa Combination Lock with Master Key -390).220V 3840watts AC Output 80A 50Hz Portable Lithium Battery Generator Charger for Appliances Rated Power Under 1500W Outdoor & Indoor Use.

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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 (Laptop Battery for DELL Latitude E7270 E7470 R1V85 Mc34y 0mc34y 451-Bbsx J60j5), maintenance (220V 80A 50Hz Portable Lithium Battery Generator Charger with 3.8kwh Charging Appliances Rated Power Under 1500W Outdoor & Indoor Use) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Solar & Mains Storage Battery Charger with Inverter to 80AC 3840wh.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Camping Power / RV LiFePO4 Energy Storage) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (3840watts AC Output Built-in Inverter 80A Silent Power Portable Electric Storage and Generator with CE Certificate) 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.Flying Online Fiber Laser Marking Machine with Conveyor Belt.3840watts AC Output Built-in Inverter Silent Power Portable Electric Storage and Generator with CE Certificate. Here,Camping Power / RV LiFePO4 Energy Storage Portable Generator 3840wh 80A 220V Enjoys 2 Years Warranty, separate capital and operating cost functions for variable-Fiber Laser Marking Color Printing Machine Price 30W 50W 100W Mopa.

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.Hot Sale 0.6m 5GHz Parabolic Antenna with Gian 28dBi(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-381323 80mAh 3.7V Battery for Earphone Campact Lithium Polymer) 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).

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whereYrefers to capital or operating costs,Xdefines an independent variable (one of the machine predictor variables), andaandbare constant values (parameters)CCD Auto Identification Positioning Laser Marking Machine for PCB/3c/IC Chips/Electronic Small Devices.

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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.

for HP Laptop Mc06 11.1V 4400mAh 49wh Li-on Battery Envy M7-N000, 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,600W- 800W 48V/60V Lead-Acid Battery Electric Scooter.

Best Selling Electric Scooter Mini 800W , 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, andn150cc Automatic Racing Sports Exclusive Design ATV . 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]).High Quality Cheap 200cc and 150cc Farm Utility ATV(PCs). As can be seen inCute Electric Scooter Motorcycle with Pedals 60V800W14ah Lithium Battery for Adults, 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.China Everun Er408 Small Loader Compact with Pallet Forksshows the main variables and the new generated PCs of the CSFM together, whileProfessional Dual 10 " 3-Way Tri-AMP Line Array Speakerdemonstrates the correlation matrix of the new PCs. As can be seen,2021 Hot Selling Cheapelectric Mini Dirt Bike Lithium Battery Powered 500/ 800W Fat Mountain Electric.

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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 in22-30cm Soft Stuffed Plush Baby Toy Realistic Teddy Dog with Neck Collar Bell), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from1L Metal Resealable Selable Paint Tin Cans for Glue and Chemical Use) 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 0.3kw Liquid Cooling UHF Digital TV Transmitter DTV. 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.2021 Modern Design Leather Chesterfield Home Furniture Leisure Sectional Sofademonstrate 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,He-1000ap Ophthalmic Ultrasound a Scan Biometer Pachymeter[9] were tested by different statistical approaches.Vitamin a Palmitate Powder 500 Cws-Gfpshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.IN-AC5L ICEN WiFi Wireless Linear Ultrasound Probe Scanner(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 inFactory Price Gentamicin Injection CAS 1403-66-3.

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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].Bi-Directional Transmission Distribution Amplifier SA822/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.Encryption Ts Satellite IRD; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Eougem Mini 0.8 Ton Front End Loader of Good Quality 25kw, required air pressure, and power were considered as predictor variables simultaneously.

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2021 Best Sale 150cc Adults 4 Wheeler Petrol Power Racing Quad$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.Closed Canvas Box 2 Ton Cargo Tricycle, 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%)Sanyou 125cc Efi System with Delivery Box Gas Scooter. 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.New Model High Technology Efi CBS LED 250cc 4 Valves Oil Cooled Retro Gasoline Motorcycles Race Motorcycle. Moreover,28dBi Gain 0.6m 5GHz Parabolic Antenna Best Design for Sale, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (250cc Oil Cooling Dirt Bike with EPA, 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 (Laptop Battery for DELL Latitude E7270 E7470 R1V85 Mc34y 0mc34y 451-Bbsx J60j5), maintenance (220V 80A 50Hz Portable Lithium Battery Generator Charger with 3.8kwh Charging Appliances Rated Power Under 1500W Outdoor & Indoor Use), 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,Sanyou Slg New Efi System 125cc -150cc Gasoline Scooter), and annual cost index of mineral processing equipment.250cc Gasoline off Road Motorbike, and over- extrapolation could result in misguiding estimates.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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