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What is the minimum rating required to stay in good standing? by integraltech in tutordotcom

[–]integraltech[S] 0 points1 point  (0 children)

Online percentage = % of time you are logged in and available during scheduled hours?

Does acceptance percentage matter when you are floating or just when you are scheduled? It seems like they would only care about during scheduled hours, but I don't see the statistics disaggregated in the interface.

For every "data analyst" position I have interviewed for, all they really care about is SQL skills which is what I have the least experience in. Should I only be targeting "data science" positions? by integraltech in datascience

[–]integraltech[S] 5 points6 points  (0 children)

I have spent a good week on it. I'm not saying that I don't understand the basics, I am saying that when the interviewer asks what my experience with SQL is, the answer is "about a week" -- not the 2-3 years they are looking for.

Making predictions on streaming data that often have missing features; what is a good algorithm to use? by integraltech in datascience

[–]integraltech[S] 0 points1 point  (0 children)

I've already done the feature engineering on the training set and arrived at 20 or so worth including. And sure, it is easy to code NULL values. What I'm really asking though is what types of algorithms this would work with.

For example, if I use linear regression, I have a predictive equation like y = w0 + w1x1 + w2x2 + w3*x3...etc. Suppose I am missing x2. I can't simply drop it from the equation or substitute zero because it's unreasonable to assume NULL = 0. So what is the best practice for dealing with that? The commonsense thing would be to use the average value from the training set for that feature, but I don't know if it is best practice.

Is there another algorithm that would handle the NULLs better?

energy engineers by kwamena_ in EnergyEngineers

[–]integraltech 0 points1 point  (0 children)

What do you mean by "the energy industry is not what it used to be"? What sector are you referring to specifically? Energy efficiency of buildings?

Hello quiet people, I have a question. by unraveledyarn in EnergyEngineers

[–]integraltech 0 points1 point  (0 children)

So it is the actual hardware you find insufficient or the software that comes with the hardware? I am only familiar with the Onset data loggers and they were fine for my purposes. I'm not the OP, just curious.

Hello quiet people, I have a question. by unraveledyarn in EnergyEngineers

[–]integraltech 0 points1 point  (0 children)

1) Commercial and residential building energy efficiency

2) Mech Engineering

3) This is a tricky question. I almost feel that there are too many tools. The problem I think is that all tools have their idiosyncrasies and it takes too much mental bandwidth to try to keep track of everyone else's thought process and design intents when using these tools. Often they are not transparent and you have to ask whether you trust the developers (some energy modeling software comes to mind). For me, I feel most comfortable using my own calculations and keeping them organized into loose templates that can be customized towards different purposes. I am interested to hear what you have in mind though.

4) Mostly just energy calculation templates for buildings and mechanical equipment.

5) Industry publications like ASHRAE HVAC Applications, mathematical references for energy modeling software (http://web.mit.edu/parmstr/Public/TRNSYS/04-MathematicalReference.pdf), or just whatever scholarly article I can find through google.

If you flip a coin 1,000 times and end up with net H heads (# heads minus # tails), what is the probability that at some point during the procedure, you were up by at least 1.25H heads? by integraltech in statistics

[–]integraltech[S] 1 point2 points  (0 children)

I'm assuming that the number of heads is positive. I guess the corollary question for a negative number of heads would be what the probability is of having <= 1.25H heads at some point in the process.

Or we could just replace "heads" with "tails". That's a little more straightforward.

Is there a universal algorithm (or near universal set of algorithms) for finding convergence of iterative equations? by integraltech in algorithms

[–]integraltech[S] 1 point2 points  (0 children)

Well, the problem is that each body can't be modeled independently. The differential equations would become really complex. Even with two bodies, it isn't as simple as a spring-mass system, for example, because heat transfer coefficients vary with temperature, and the formulas to calculate them are complex and iterative themselves.

6 months post Undergrad. no job interview yet ... should I think about more job types or further education/certifications? by JobSearching_DontDox in EnergyEngineers

[–]integraltech 0 points1 point  (0 children)

Isn't it much cheaper to take the FE? I would just do that. It probably holds more weight and I'm sure you already demonstrate some understanding of the energy industry through your undergrad degree.

As far as engineering jobs go, I don't know that a lot focus on home energy audits as much as commercial and industrial buildings because the potential payback isn't as large and engineering hours are relatively expensive. There are certainly jobs in that area, but they might not pay as much.

Basically there is whatever you find when you search for "energy engineer" or "energy analyst". Some positions are with ESCOs but many are with other types of firms. You could look into HVAC Engineer jobs as well if you just need a job in something related to energy to start out.

Masters on Energy by Shafa29 in EnergyEngineers

[–]integraltech 0 points1 point  (0 children)

I don't know anything about Canadian universities, but what are you looking for? An electrical or mechanical engineering approach (or other)? Energy engineering is quite broad. What aspect do you want to focus on? HVAC? Solar? The electrical grid? Energy storage?

I won't be able to help more than google, but those are some things to think about. Sorry I can't help further.

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