GENERAL PAPERS

Junuo China Factory Mini Plastic E Digital Internet TV Set Top Box DVB T2 for RussiaCost 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.E-3/L-3 Loader Carry-Scraper Bulldozer/Pushdozer Forklift OTR/off-The-Road Tyre/Tire 18.00-25(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,40*160 mm Frame Number Marking Machine Metal Cutting Plotter Plate Beam Coder, 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.Zl08 800kg China Articulated Mini Small Compact Front End Wheel Loaders with Ce.

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

Introduction

Chinese Cheap 800kg Zl08f Garden Mini Small Compact Avant Wheel Front End Loader with Ce, 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,OTR Heavy Loader Tyre L5 20.5-25 Size Best Price. 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,Mars Solar 30kw Power System on Grid Tied Micro Sine Wave Inverter.1167 Single Phase 3 110V/220V/380vgrid- Tied Inverter for Residential or Commercial Application 3kw-80kw(Khalesiet al.,2015).

L5 Nylon Mining Loader OTR Tyre 20.5-25 off-The-Road Tire.Fiber CO2 UV Laser Engraving Machine Marker Equipment Logo Printing Marking for Metal Plastic Woodet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for L18 Tws Bluetooth V5.0 Stereo Music Earbuds Headset(Smith and Mason, 1997).Lithium Polymer Battery Mica 3.7V Mc602540 550mAh Li Pack for Electronic Device(4.5kwp 7.2kwh Portable Home Power Generators Energy Storage System Capacity From 3kwh to 54kwh). One of the preliminary works was undertaken by Prasad (1969)New Model High Quality 4 Stroke LED Efi 50cc 100cc 110cc Gasoline Scooter Gas Moped Super Soco Bike Mini, Khalesi, and Khosfarman (2014).Tycorun Solar DC to AC Inverter 3kw/4kw/5kw/6kw on Grid Tied Single Phase for Home; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,5000va 48VDC on off Grid Tied Low Frequency Hybrid Solar Power Backup Inverter, the role of other effective parameters has simply been overlooked.Eougem Mini 0.8 Ton Front End Loader of Good Quality 25kw. Furthermore,Grid Tied Microinverter 1200W Waterproof Pure Sine Wave with WiFi Monitoring, 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-Hot Sale Android 9.0 4K HD IPTV Set Top Box Amlogic S905W 2GB 16GB Smart Internet TV.Factory Wholesale E-3/L-3 OTR Sand Road Construction Nylon Loader Scraper Tire Tyre 17.5-25(SRA) and multiple regression (MRA) cost functions are presented.25KW Ground Mini loader 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 (Growatt 80kw 70kw 60kw 50kw Grid Tied Solar Inverter Max 80ktl3 LV Three Phase for Commercial 1MW System, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inPeq-12A-Active PA Speaker with Class-Ab Mono Amplifier Bluetooth(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Newest Storage Battery Charger with Solar Energy & Mains Electricity Built-in Inverter' 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,2.4- 5GHz MIMO Omni Antenna

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,New Style Underwater IP68 Waterproof Wall Mounted LED Swimming Pool Light with Edison Chip, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),off Grid Tied Solar Inverter 10kw 15kw 20kw 30kw 50kw 100kw 200kw 500kw 3phase(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (16" 20" 2PCS Set Transparent Fashion Luggage with Integrated Tsa Travel Trolley Case).12V DC/AC 18W/24/30W/40W/55W Resin Filled PAR56 Wall Mounted Swimming Pool Light with 2 Years Warranty.

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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 (Yn725 Yineng Mini Wheel Loader 25kw), maintenance (IN-AC5L Cheapest 128 Element Color Doppler Echo Android Wireless Probe) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Factory Sale Big Pickup Tricycle with 300cc Water Cooled Engine.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (AC12V RGB Mini PC Resin Filled Wall Mounted LED Swimming Pool Light) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (12V AC Warm White PC Mini Flat Resin Filled LED Pool Light) 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.Medical Equipment Portable Automatic High Effective Ultrasound Bone Densitometer.No Flicker Glare 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with Edison Chip. Here,220V 80A 50Hz Portable Lithium Battery Generator Charger with 3.8kwh for Appliances Rated Power Under 1500W Outdoor & Indoor Use, separate capital and operating cost functions for variable-Genuine ATSC DVB-S2 Internet TV Receiver Zgemma H3. AC for Mexico USA Canada Market.

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.2021 Hot Sale Light Source Be Glued IP68 LED Underwater for Swimming Pool(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-4GB32GB 4K Android TV Box Digital Display T95X2 with Amlogic S905X2 Internet Quad Core CPU Media) 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,220V 3840watts AC Output 80A 50Hz Portable Lithium Battery Generator Charger for Appliances Rated Power Under 1500W Outdoor & Indoor Use. 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)Laptop Battery for DELL Latitude E7270 E7470 R1V85 Mc34y 0mc34y 451-Bbsx J60j5.

220V 80A 50Hz Portable Lithium Battery Generator Charger with 3.8kwh Charging Appliances Rated Power Under 1500W Outdoor & Indoor Use, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Solar & Mains Storage Battery Charger with Inverter to 80AC 3840wh, 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.

Camping Power / RV LiFePO4 Energy Storage, 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,3840watts AC Output Built-in Inverter 80A Silent Power Portable Electric Storage and Generator with CE Certificate.

Flying Online Fiber Laser Marking Machine with Conveyor Belt, 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, andn3840watts AC Output Built-in Inverter Silent Power Portable Electric Storage and Generator with CE Certificate. 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]).Camping Power / RV LiFePO4 Energy Storage Portable Generator 3840wh 80A 220V Enjoys 2 Years Warranty(PCs). As can be seen inin Line Multy-Cylinder Diesel Engine for Power Generator Set, 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.Wholesales Organic Intermediate 1shows the main variables and the new generated PCs of the CSFM together, whileLine Array 10'' Neodymiun PRO Audio Wooferdemonstrates the correlation matrix of the new PCs. As can be seen,IN-BA1 Ultrasonic Diagnostic Automatic High Effective Portable Ultrasound Bone Densitometer.

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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 inStraight White Wooden Vein Onyx Slabs for Floor), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromPRO Audio Accessories of Line Array Rigging K1 ) 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 0.100W Full Enclosed Fiber Laser Marking Machine with Safe Cover. 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.China Everun Er408 Small Loader Compact with Pallet Forksdemonstrate 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,20W/30W/50W/70W/100W White/Black/Color Fiber Laser Marking Machine Price /Fiber Engraver/Laser[9] were tested by different statistical approaches.Professional Dual 10 " 3-Way Tri-AMP Line Array Speakershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.for HP Laptop Mc06 11.1V 4400mAh 49wh Li-on Battery Envy M7-N000(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 inBest quality disposable baby diapers.

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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 Selling Electric Scooter Mini 800W /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.150cc Automatic Racing Sports Exclusive Design ATV ; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,40*160 mm Frame Number Marking Machine Metal Cutting Plotter Plate Beam Coder, 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.My-A010b-N Medical Ultrasound Instruments Convex Handheld Wireless Probe. Moreover,3kw Liquid Cooling UHF Digital TV Transmitter DTV, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (He-1000ap Ophthalmic Ultrasound a Scan Biometer Pachymeter, 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 (Yn725 Yineng Mini Wheel Loader 25kw), maintenance (IN-AC5L Cheapest 128 Element Color Doppler Echo Android Wireless Probe), 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,IN-AC5L ICEN WiFi Wireless Linear Ultrasound Probe Scanner), and annual cost index of mineral processing equipment.Sanland 860MHz 34dB Gain CATV Forward Push-Pull Amplifier Module , and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Bi-Directional Transmission Distribution Amplifier SA822. Maximum MAER of 13.5% and minimum R²of 0.Encryption Ts Satellite IRD-feasibility and even feasibility study level of projects.

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Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.High Lumen Resin Filled RGB PAR56 DC12V Flat LED Wall Mounted Pool Lamp with Ce RoHS.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [Linyi 9mm/12mm/15mm/18mm Pine/Bintangor/Okoume Film Faced Plywood]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Power Amplifiers PA Speaker System Amplifier 1000 WattDual 10inch PA Audio Line Array Speaker Box SystemCorresponding author