Questions tagged [data]

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Where I can download soil classification laboratory data? [closed]

Edit: the ASTM D2487 laboratory test is essential in Civil Engineering, when designing foundations, dams, railways, roads, and many other structures. I'm writing a program for classification of soils, ...
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1 answer
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Flow Velocity Data Automation - Platform/Controller Selection

I have been tasked with (semi) automating flow velocity data collection using a pitot tube in a minaturized wind tunnel. The pitot is mounted on a two axis stepper motor system which is controlled by ...
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1 answer
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Incorporating a dichotomous failure model for sustainment analysis

Disclaimer: I am a data scientist, not an engineer. I have been tasked with forecasting failures of a given part and seeing how it affects inventory. Suppose I have historical yearly failure data for ...
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51 views

Why we are using PT1 Damping in automobile Sensor values?

I got to know that most of the automobile manufactures are using PT1 Damping (concept like raising Linear/ PT1 failing time etc. ...
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2 answers
77 views

Is there any speed difference if we replace a 200-300 meters of copper cables with optical fiber cables? Whats the reason if it increases?

All of us know that the optical fiber cables have more data speed than the traditional copper cables. That's the reason why they're getting replaced in most of the countries. But does even a 200-300 ...
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1 vote
2 answers
187 views

How do I remove outliers in measured sound pressure levels data?

I have measured sound pressure levels (24 h sampling at 25600 Hz) data for many days. The focus of measurements was on road noise, which is a dominant source of noise in the measurement setting. ...
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4 answers
126 views

Calibrate a sensor using another, already calibrated sensor

I have two light sensors. Sensor A is factory-calibrated and gives a linear response to the light at a certain wavelength. Sensor ...
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-1 votes
1 answer
73 views

How to graph a dimensionless ratio as the parameter on an XY graph? [closed]

We conducted an experiment to determine the relationship between the heat transfer coefficient for forced convection over a cylindrical rod due to varying air flow velocities. The relationship that ...
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1 vote
0 answers
35 views

Where do I start with learning how to transfer data via RF

So I literally have no idea where to start but I know what I want to make. The goal is to somehow transmit 25mb/s of data across 15km with high penetration. Acceptable for reaching through trees and ...
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1 answer
34 views

Do LiDAR sensors generate point cloud data from a single collection or build them up over multiple collections?

I am currently writing a background section on lidar sensing for part of my dissertation. I have either confused myself or not thought on the topic enough and I am attempting to gain a clearer ...
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1 vote
2 answers
47 views

LAN data from computer

I have an HMI (Siemens MP 377) to print collected data on a LAN connected printer. Now I would like that the data that are being sent to the printer is also received at a computer through Ethernet LAN....
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1 vote
0 answers
36 views

Reading a value off a screen with a camera

I'm looking to log some information on a piece of equipment I have running at home. It displays the information I want - operating rpm and some other settings - on seven-segment displays. In an ideal ...
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1 answer
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I just learned about signed magnitude ,1's complement and 2's complement representation and I want to make sure that I understood them

So if I have the number 17 ( 8 bit code), the signed-magnitude representation is : 00010001 For -17 : 10010001 For 1's complement 17 = 00010001 For 1's complement -17 = 11101110 For 2's complement 17 =...
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How to find raw data sets for engineering?

For one of my courses the teachers asked me to find two samples of 30 or queries of data, and I was thinking on how I could begin to search it? Most of the scientific articles that i looked for ...
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2 votes
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49 views

How can the Microsoft and the Facebook Fibers reach 160 Tbps between Virginia and Bilbao?

According to this article, Microsoft and Facebook have completed a 160 terabits cross-Atlantic cable. Based on my calculations, this doesn't seem probable, so what did I miss in my calculation? The ...
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2 votes
1 answer
130 views

Why laptop keyboard has so many bus lines?

I changed one laptop keyboard on the new one and while changing it I noticed that it has 30 line bus. But from my VLSI practice, I know that keyboard can use only 1 data line and 1 clock line (PS/2) ...
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2 votes
2 answers
49 views

Measurement of immobile curved surface

I'm not entirely sure if this is the right place to ask this, so apologies in advance if it doesn't belong. I have a curved surface with many small, irregular holes in it that I would like to measure....
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2 votes
1 answer
114 views

What is the best graph type to show a comparison value between two cases?

In that graph, I want to show the two values and the error percentage from the comparison between two values. I am using microsoft excel. can anyone give me any idea which best graph for this case? ...
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3 votes
1 answer
49 views

What is a good reason if the data from analysis and measurement does not give a good agreement?

Currently I am doing a comparison results between analytical results and measurement results, I compare stress and strain values in 32 specified locations, unfortunately I found that there are some ...
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4 votes
1 answer
1k views

Calculating gyro data from accelerometer, pitch, roll and yaw

I am currently collecting accelerometer and attitude data using smartphone sensors. Data is collected at 100Hz over 2.5 seconds. Of which there are 250 accelerometer points and 250 points representing ...
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1 answer
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Historical data for using supervised learning algorithm in the field of Mechanical Engineering [closed]

Being a student in the field of Mechanical Engineering, I am very new to Machine Learning.I did a couple of basic online courses of Machine Learning (including the one by Andrew Ng on Coursera). So, I ...
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1 vote
2 answers
82 views

Choosing significant figures when dealing with a wide range of values

In a calculation I have received a number of values in the range $1e4-1e6$. Now I would like to display the values with 3 significant figures according to the rules of using significant figures. But ...
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0 votes
2 answers
100 views

Data logger via modbus hardware solution

I have 3 programable logic controllers and other one which isn't part of my solution but I can access usefull data via modbus. I've setup windows service on a remote server to gather data and store it ...
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0 answers
371 views

Latent heat of fusion of water near triple point

When a thermally isolated vessel of liquid water is depressurized to vacuum, part of water will evaporate, remainder will freeze - total heat being split between latent heat of ice and enthalpy of ...
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1 vote
0 answers
425 views

How can I increase my ultrasonic sensor accuracy?

I am using a long ranged ultrasonic sensor to measure milk height in milk silos. Milk is stirring. Milk Silos Design: Shows two type of silos both are stirred in different direction
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3 votes
1 answer
79 views

Difference between broadcasting operation and one-to-many in RF transceiver

While writing a report on data broadcasting I came across this paper where I found description on broadcast operation and one-to-many as shown below broadcast operation; where a single master ...
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4 votes
2 answers
117 views

Viscosity of select species at atmospheric pressure for very large temperatures?

I'm dealing with hot combustion products flowing through heat exchangers and I'd like to perform some calculations regarding the flow properties (velocity, temperature, pressure and density) as it ...
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0 votes
1 answer
390 views

How is RF data encoded in WAV files?

I have tried recording RF data using several different software packages: SDR Console, SDR# and HDSDR. They all seem to produce WAV files. When I open the HDSDR file in Mathematica, it says the file ...
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3 votes
1 answer
314 views

How do I read the component dimension labels given in a schematic?

How to read the dimension labels of this IC?
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1 vote
1 answer
435 views

How to find the wear rate of materials in the net?

Are there any free online databases where I can access data for the wear rates of materials? I tried using CES EduPack, but I'm having no luck. Maybe other free and open databases are also existing ...
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6 votes
4 answers
896 views

How can I calculate the rate of power consumption of a solar car along a known route with changes in elevation?

I am working on designing and creating a solar powered car for the Solar Car Challenge. The car will have to race from Dallas, TX to Minneapolis, MN in 5 days (~5 hours of driving a day) along back ...
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4 votes
1 answer
86 views

How to display data with three degrees of freedom on a chart?

I have a collection of data obtained from calculations and I want to display it on a chart or whiz-wheel or similar, to be used "in the field" as a low-tech solution, since no computer will be ...
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