## Ramakrishnan

Ramakrishnan Vaidyanathan

## 12 Badges

7 years, 245 days

## Social Networks and Content at Maplesoft.com

With twenty years of Industrial experience and twenty years of teaching experience, I am now as retired Professor, using Maple to teach mathematics subject for students studying X to XII standards. Published XII Mathematics books.

## List command - Doubt...

Maple

The command L2(1,2) etc (statements 5 to 8) all are considered as valid and gives the complete list as the answer. Can anyone interpret the behaviour and logic behind the maple answers?

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Download Doubt1.mw

## How to remove equation labels? in Maple...

Maple

Pl. help me remove the equation labels or hide the equation labels in my doc enclosed. What should i do to prevent equation labels from forming in my document. Please refer last two rows in the table below from the document.

Thanks for helping.Ramakrishnan V

Conversion from ppm to % vol is 1ppm = 0.0001 %

Conversion from % vol to ppm is

Avagadro's law between mass and volume is

where T is abs temperature and M is molecular weight;

M/(0.08205T)]*ppm*((A/F)*EA+1) /ρex; Emission is mg/kg fuel

If SFC is x g/kWhr; then Mass flow of exhaust is  (x/1000)*[M/(0.08205T)]*ppm*((A/F)*EA+1) /ρex; Emission is mg/kWhr

If the distance covered per liter is DCL km/liter, then (SFC/1000)*(DCL)/  is distance covered in km/kWhr

1 g/cc = 1 kg/lit; 1kg/m3 = 1 g/lit; Fuel density  is 0.77 kg/lit

Emission in mg/km = 0.77*Emission is mg/kg fuel/(km/liter fuel)

SFC is in g/kWhr

Measured emission is  E in ppm

Excess Air percentage is EA in per unit point

Molecular Weight of pollutant is M g/mol

Molecular weight of air =  =  g/mol

SFC

g/kWh

 (1)

kg/liter

DCL

km/liter fuel

A/F

EA

 (2)

K

 (3)

kg/m3

=

CO

CO2

HC

NO2

O2

N2

Air

M [g/mol]

Emission [% ] or[ppm]

%

%

ppm

ppm

%

%

%

Emission [mg/Nm3]

 (4)

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Emission

mg/kWh

=

=

=

=

=

=

=

Emission

mg/kg fuel

=

=

=

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=

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=

 (13)

=  =

=

Emission

[mg/km]

Why in the above row, col2 and col3 have no equn nos?

What should i do to remove the equn numbers 11, 12 and 13?

Temperature of exhaust is in T K

Density of exhaust is say  kg/m3

DCL is distance covered per kWh

 (14)

Emission in g/kWhr is

Emission g/g of fuel = Emission in g/kWhr/SFC in g/kWhrper

Emission in mg/km = 0.77*Emission is mg/kg fuel*(km/liter fuel)

Download ppm_to_g_per_km_conversion.mw

## Please_modify_loop_logic...

Maple

I have spent much of my time earlier to make curve fitting possible. Somehow, because of my mistakes, the format for curve fitting changed. Can any one help me with getting my answer for curve fitting in the doc and from the excel data enclosed. Data imported, but donot know how to order the way it wants. I know the way,but do not iknow how to get it now.

Thanks

Ramakrishnan VExperimentalData.xlsxPleasePlot_Doubt.mw

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Download PleasePlot_Doubt.mw

## Doubt in List - Answers unable to explai...

Maple

Dear colleagues, Can anyone explain what (a::list,b::list) will be understood by the programme?

I thought the programme is made for only adding the numbers in the list. But it seems there is something more than that, i could not get.

Equn label (6) onwards, I donot understand, how the answer was obtained.

Thanks for explaining.

Ramakrishnan V

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=

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Download Doubt_on_list.mw

## Given x, y and z values for two cases, t...

Maple

Dear friends,

 Effect of A and B on z values A B x values y = 5 y = 5
Table 1: Effect of Modified Parameters on z output

Dear friends.,
I want a suitable plot for the above data. I have given the values as [ x  y  z] for z values to be plotted for the two cases, A and B in the same graph to compare and get the best option x ,    y and A or B .

Mathematically an x vs y vs z plot. Any bar or similar plot is what seems suitable to me.

I could not locate any help for plotting 3D data values in help page.

Any suggestions and solution please.

Thanks.

Ramakrishnan V

Download 3Dplot_given_Data_xyz.mw

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