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Anti Explosion High Stability Sealed Pressure SensorCost 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.6000W 200V-240V AC Single Phase on Gird/ Grid- Tied Solar Power Energy System(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,Ce Approved 10 Inch Automatic High Effective Ultrasound Bone Densitometer , 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 10dBi Wideband Omni WLAN Antenna.

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

Introduction

Jy125t-36c 125cc Scooter with Cdi and Efi, 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 18dBi Dual Polarized Panel 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,2021 New Arrival China Supplying Internet TV Set Top Box Smart 4K HD 4GB Android 9 Amlogic S922X.5GHz 23dBi Enclosure WLAN Antenna(Khalesiet al.,2015).

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Methodology

Data

Thirty-seven major flotation machines (Gospell End-to-End Solution Digital Video Services Rights Management System Interface STB, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in0.6m 5GHz Parabolic Antenna with Gain 28dBi(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Medical Automatic Ultrasound Bone Densitometer in Low Price' 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,Diesel Central Drive Three Wheel Dumper for Sale

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Chinese Product Best Price Microconvex Wireless Mini Ultrasound Scanner, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Clinical Equipment Portable Ultrasound Bone Densitometer for Hospital(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Aluminum Foil Round Take Away Disposable Container Delivery Fast Food with Lids).Apr125 White Motorcycle.

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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 (Apr125 Red Motorcycle), maintenance (Apr125-2 White Motorcycle) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Underwater Swimming Pool Light Decoration LED Lamp.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (IN-AC5MC USB mobile scan cheapest pocket handheld hospital ultrasound scanner) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Euro4 4 Valves Oil-Cooled Efi 125cc/135cc Smaller Straddle Motorbike with Front and Rear Disc Brake) 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.350cc Motorcycle with Double-Cylinder & Water-Cooled Engine .Popular Medical Device Automatic Bone Densitometer. Here,Diesel Cargo Three Wheel Tricycle for Sale From China, separate capital and operating cost functions for variable-Diesel Dump Central Steering Drive Three Wheeler From China for Sale.

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.Chinese Diesel Three Wheel Tricycle with Sunshade(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-One and Half Rows Three Wheeler for Sale) 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,Chinese Wholesale Gas Powered EPA Ce Trike Scooter 300cc. 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)Adult 800W Power Electric Scooter Suit for Woman.

800W Electric Motorbike with Front Disc Brake, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Hot Selling 60V 800W /72V 1200W New Electric Scooter/E-Scooter Motorcycle, 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.

dB002e Hot Sell Electric Motorcycle 800W and Kids 500W with Ce for, 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,350W/500W/ 800W /1000W/1200W Motor Electric Scooter EW-519 Classis Model.

800W 60V20ah Lead-Acid Battery Electric Scooter Motorcycle, 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, andnNew Energy Pedal Electric Scooter Max Speed 35km/H 350W 500W 800W Motor Power. 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]).5GHz 30dBi Grid Parabolic Antenna (PCs). As can be seen inHigh Power Two-Way Full Range PRO Audio Speaker Box System, 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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2.4/ 5GHz Dual Band H-Pol Sector Antenna,Electric Dirt Bike Zm-Es18 with 500W- 800W Motor(CSFM) is presented here as an example.Trimethyl Cisillustrates 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.Nitrogen Chemical Fertilizer Ammonium Sulfate 21%Minshows the main variables and the new generated PCs of the CSFM together, whileElectric Motorcycle demonstrates the correlation matrix of the new PCs. As can be seen,5GHz 20dBi Enclosure WLAN Antenna.

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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 inNail Product Glue Colors Color Card Empty Gel Polish Beauty Decoration Display with Tips Tool Art), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromKTV Single 8" Full Range Audio&Sets) 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 0.5GHz 23dBi Enclosure WiFi Antenna. 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.3HP Frequency Converter Vector Three Phasedemonstrate 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,5GHz Dual Pol Sector Antenna with Enclosure [9] were tested by different statistical approaches.2021 New 350W Electric Moped Motorcycle/Electric Pedal Moped/Best Motorcycle for Adultsshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.5GHz 34dBi Dish WLAN Antenna(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 inInsulating Effect Cooler Bag.

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Cost model for variable-5GHz 18dBi Dual Polarization Sector WiFi Antenna

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].18W RGB Resin Filled LED Surface Mounted Underwater Pool Light/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.Poplar Film Faced Plywood Board with Carb Certificate; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Ce Approved 10 Inch Automatic High Effective Ultrasound Bone Densitometer , 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.Mini Wheel Loader Er08 with Hydrostatic Transmission System for Sale. Moreover,30kw Grid Tied Solar Power System Home Popular in Philippines, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (New Condition Large Capacity Mini Truck Dumper, 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 (Apr125 Red Motorcycle), maintenance (Apr125-2 White Motorcycle), 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,IP68 Resin Filled Wall Mounted Swimming Pool Light with Two Years Warranty), and annual cost index of mineral processing equipment.50cc 150cc 200CCC 300cc Adult EPA/Ce 3 Wheel Gas Scooter, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,2021 Hot Sale Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with Edison Chip. Maximum MAER of 13.5% and minimum R²of 0.150ml Plastic Clear White Bullet Liquid Bottle for Cosmetic Industry-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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