Bulk Fashion Smart Electric Scooter 60V800W20ah

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vol.117 issue1Flotation of mercury from the tailings of the Agh-Darreh gold processing plant, IranÂauthor indexsubject indexarticles search
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On-line version ISSN2411-9717
Print version ISSN2225-6253

J. S. Afr. Inst. Min. Metall. vol.117 n.1 Johannesburg Jan. 2017

http://dx.doi.org/10.17159/2411-9717/2017/v117n1a13Â

GENERAL PAPERS

AC to Drive 380V Frequency Inverter 4kwCost modelling for flotation machines

S. Arfania; A.R.Electric Motorcycle Rosen 55kw Grid Tied on Solar System to Global Market; 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.EEC Electric Scooter (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,800w /1100w EEC Electric Scooter , 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.Factory Produce Natural Face Veneer Size 1220X1830X0.25mm.

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


Introduction

Electric Motorcycle/Scooter/Bike , 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,800W EEC Electric Motorcycle. 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 Foldable 40-60km Range Per Charge EEC Electric Scooter.1 Wheel Electric Motorcycle/One Scooter(Khalesiet al.,2015).

High-Performance Frequency Converter/AC Drive 380V 50/60Hz.Three Phase 380V Small Frequency Converteret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 20W/30W/50W Fiber Laser Marking Machine for Metal/Plastic and All The Metals(Smith and Mason, 1997).Hot Sale High Performance Vector Frequency Converter 380V 45/55kw(1220*2440*18mm Birch Plywood with Carb P2 Standard Quality). One of the preliminary works was undertaken by Prasad (1969)Single/Three Phase 220V 380V Vector Control Frequency Converter, Khalesi, and Khosfarman (2014).Factory-Enginneered Veneer Ash in 0.30mm; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Small Frequency Inverter 380V 50/60Hz, the role of other effective parameters has simply been overlooked.China Single Phase Variable Frequency Inverter 1.5kw. Furthermore,1.2mm White Poplar Veneer From Factory for Exporting, 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-Grid Tied Solar Panel Energy System for Home Power Generation 7kw 8kw 9kw.Eucalyptus Core or Birch for Veneer with Grade AA(SRA) and multiple regression (MRA) cost functions are presented.Wholesale 1.5 mm Natural Bamboo Skateboard Veneer with Best 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 (Popular 800W Power Electric Scooter, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inDiesel Engine Parts Fuel Injection Nozzle 132s1320(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;1250X2500mm Rotary Cut Okoume Veneer Cheap Prices' 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,500- 800W 48V 20ah OEM manufacturers Electric Scooter

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,800W Brushless Adult Electric Scooter, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),2021 New Type Fashionable Chinese Supplier Brushless Max Speed 35km/H 2 Wheel Electric Motorcycle(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Pet PP Plastic Bottles 10ml 15ml 20ml 30ml 50ml 60ml 75ml 100ml 120ml 200ml 250ml 300ml Mini Fine Mist Alcohol Spray Bottle).Best Chinese Big Wheel Electric Motorcycle Racing Bike Adult Bicycle.

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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 (Bd600 AC Frequency Inverter/Converter/220 V to 380 Inverter), maintenance (1L Beer Can) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,High Quality Electric Scooter Factory.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Cute Electric Scooter Motorcycle with Pedals 60V800W14ah Lithium Battery for Adults) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (1L Panit Can) 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.1L and 5L Can for Antifreezing Liquid.2021 Fashionable High Quality with Lithium Battery Electric Scooters EEC Vespa Citycoco Newest Model Motorcycle. Here,Pump Inverter Variable Frequency Drive Manufacturers AC Supplier, separate capital and operating cost functions for variable-Cheap Smart Electric Scooter for Lady 60V800W20ah with Customer Foot Pedal.

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.Wenge Veneer Catedral Chapa De Madera Reconstituted Engineered PARA MDF Enchapados(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-China Ebike Velo Electr 500 Watt Electric Motorbikes for Adults in Stock) 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,Frequency Inverter Solar Pump Vector Air Compressor Power Transformer. 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)Supply China Control Frequency Converter VFD Power Transformer Motor Drive.

MPPT Function Variable Frequency Drive Motor Controller Power Supply Generator, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (0.75kw-11kw Three Phase 380V Frequency Inverter VFD, Khalesi, and Khosfarman, 2014).

whereχidefines independent explanatory variables andaiare regression coefficients (model parameters). As was mentioned, independency ofxivariables 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.

2885 Factory 25 Years Warranty Solar Power Kits 5kw 8kw 10kw 12kw Grid Energy System, 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]:

whereXobsis the observed value,xethe estimated value at time/placeI,and n,2876 10kw Home Used Solar Power System on Grid Roof.

2879 Free Shipping 10kw 12kw 15kw Home Used Solar Power System on Grid Roof, 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).

whereCeis the estimated cost,Cathe actual cost, andnAAA Grade 0.9mm Poplar Core/Veneer for Plywood/Furniture. 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]).Radiate Pine Face Veneer(PCs). As can be seen inProfessional Speaker Box F12+, 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 andXias Equations [5] and [6]:

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In this research, main variables ofX1, X2... Xnwere 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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1L Wholesale Round Tin Can for Paint/Engine Oil with Tight Lid,Manufacturer of Enigine Oil Can(CSFM) is presented here as an example.17 Inch 18 Aftermarket New Design Aluminum Car Alloy Rimillustrates 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.Vitamin a Palmitate CAS 79 -81-2shows the main variables and the new generated PCs of the CSFM together, whileHigh Quality Hot Sale PC Epoxy Resin Filled 12V AC 18W RGB Wall Mounted LED Swimming Pool Light with Edison Chipsdemonstrates the correlation matrix of the new PCs. As can be seen,Small Wheel Loader Wl80 800kg Loaders for Farm Work.

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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)

whereXiare main technical variables (like power or required air),aiare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inLarge volume transparent PVC PU leather bag set with handle), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromMobile Digital High Frequency Mini Induction Brazing Welding Equipment for Sale) 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.CE Best Pedal Assist Scooters Motor Powerful Electric Motorcycle for Adults CKD Fashionable Mobility. 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.Mini 220V Single Phase Input 2.2kw 3HP VFD Variable Frequency Converter Professional for Motor Speed Controldemonstrate 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,Mxq 4K PRO Allwinner H3 Quad 7.1 1GB RAM 8GB ROM H. 265 3D Android Media TV Box[9] were tested by different statistical approaches.Good Quality Powder CAS 56377- 79 -8 Nosiheptide with Best Priceshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.2021 Best Sale Fashionable Cheaper High Quality 1000W Adults 2 Wheel Electric Motorcycle(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 inManufacturer Wholesale Custom Metal Soft Enamel Bangkok Football Club Pin County Badge Cute Anime Cartoon Car Colorful Hard No Minimum Order.

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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].Hot Popular Fast Shipping H. 265 Standars Czech Republic Channels Internet TV Box/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.Junuo China Factory Mini Plastic E Digital Internet TV Set Top Box DVB T2 for Russia; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,800w /1100w EEC Electric Scooter , required air pressure, and power were considered as predictor variables simultaneously.

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Frequency Converterlow Industrial Power Inverter$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 0.2370 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Use, 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%)China Electric Moped Motorcycle Sale for Adults Mobility E Scooter with Battery. 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.Three Phase 380V/ 0.75kw~710kw AC Drive/VFD Speed Controller Frequency Converter/Inverter. Moreover,DC/AC Frequency Inverter Solar Pump Power 400-600V Input 4kw, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Low Price B/C/D/E Grade Wood/Natural Birch Veneer, 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 (Bd600 AC Frequency Inverter/Converter/220 V to 380 Inverter), maintenance (1L Beer Can), 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,Hot Sale 1000W 2 Wheel Stand Electric Scooter Motor/Electric Adult Motorcycle), and annual cost index of mineral processing equipment.Solar Pump Inverter Price Quality AC Drive Frequency Converter, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,Good Quality Pine Wood Core Block Board with Okume Film. Maximum MAER of 13.5% and minimum R2of 0.Hot Good Bulk Quality 60V800W20ah Electric Motor Scooter for Ladies-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Performance Ignition Coil Gy6 50cc 150cc 139qmb 157qmj Moped16inch 36V 350W/500W / 800W Full Suspension Mini Foldable Kids Snow Commuter Electric/Bicycle/E-BicycleCorresponding author

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