311 | New web portal for BOS:311 | Frontend Framework library
kandi X-RAY | 311 Summary
kandi X-RAY | 311 Summary
The source code for the future 311.boston.gov.
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Top functions reviewed by kandi - BETA
- Renders the value list attribute list .
- Renders the values in multiple values .
- Fetch the GraphQL graph from the client .
- Render status description
- Generates a number attribute .
- Render a string attribute .
- Renders a submitted request .
- Fetch the graphql query .
- Page component .
- Formats an address .
311 Key Features
311 Examples and Code Snippets
Community Discussions
Trending Discussions on 311
QUESTION
I have implemented a Convolutional Neural Network in C and have been studying what parts of it have the longest latency.
Based on my research, the massive amounts of matricial multiplication required by CNNs makes running them on CPUs and even GPUs very inefficient. However, when I actually profiled my code (on an unoptimized build) I found out that something other than the multiplication itself was the bottleneck of the implementation.
After turning on optimization (-O3 -march=native -ffast-math
, gcc cross compiler), the Gprof result was the following:
Clearly, the convolution2D
function takes the largest amount of time to run, followed by the batch normalization and depthwise convolution functions.
The convolution function in question looks like this:
...ANSWER
Answered 2022-Mar-10 at 13:57Looking at the result of Cachegrind, it doesn't look like the memory is your bottleneck. The NN has to be stored in memory anyway, but if it's too large that your program's having a lot of L1 cache misses, then it's worth thinking to try to minimize L1 misses, but 1.7% of L1 (data) miss rate is not a problem.
So you're trying to make this run fast anyway. Looking at your code, what's happening at the most inner loop is very simple (load-> multiply -> add -> store), and it doesn't have any side effect other than the final store. This kind of code is easily parallelizable, for example, by multithreading or vectorizing. I think you'll know how to make this run in multiple threads seeing that you can write code with some complexity, and you asked in comments how to manually vectorize the code.
I will explain that part, but one thing to bear in mind is that once you choose to manually vectorize the code, it will often be tied to certain CPU architectures. Let's not consider non-AMD64 compatible CPUs like ARM. Still, you have the option of MMX, SSE, AVX, and AVX512 to choose as an extension for vectorized computation, and each extension has multiple versions. If you want maximum portability, SSE2 is a reasonable choice. SSE2 appeared with Pentium 4, and it supports 128-bit vectors. For this post I'll use AVX2, which supports 128-bit and 256-bit vectors. It runs fine on your CPU, and has reasonable portability these days, supported from Haswell (2013) and Excavator (2015).
The pattern you're using in the inner loop is called FMA (fused multiply and add). AVX2 has an instruction for this. Have a look at this function and the compiled output.
QUESTION
i build project using node express and using https://nodejs.org/api/packages.html#packages_subpath_patterns to prevent "../../../xxx.js"
I added this to package.json
and working perfectly
ANSWER
Answered 2022-Mar-04 at 02:27Add this in your Jest Configuration (e.g. jest.config.json)
QUESTION
My dataset contains 2 variables Y and X. Y was measured every 1.0 seconds.
I am trying to calculate the average slope within a moving 60-second-window, i.e. after calculating the first 60-second slope value the window moves forward one time unit (1.0 seconds) and calculates the next 60-second-window, producing successive 60-second slope values at 1.0-second increments.
My data:
...ANSWER
Answered 2022-Mar-01 at 17:36You could do this with a loop:
QUESTION
Thanks to this answer, here is how I'm getting permutation index and permutation at an index:
...ANSWER
Answered 2022-Feb-28 at 12:40In this answer I will demosntrate two modifications that can be done to improve the speed of item_at
and item_index
.
Before we start let's initialize the Cl table, to handle calls with distinct=200
QUESTION
I have the following DF
...ANSWER
Answered 2022-Feb-19 at 10:43After the initial summarize
, you have one entry for each article per year. You then wish to know what the contribution of each article was to each year's total, so you need to group_by
again using just the year, and finally mutate
to get the proportion for each article.
QUESTION
I have the following 2 query plans for a particular query (second one was obtained by turning seqscan off):
The cost estimate for the second plan is lower than that for the first, however, pg only chooses the second plan if forced to do so (by turning seqscan off).
What could be causing this behaviour?
EDIT: Updating the question with information requested in a comment:
Output for EXPLAIN (ANALYZE, BUFFERS, VERBOSE)
for query 1 (seqscan on; does not use index). Also viewable at https://explain.depesz.com/s/cGLY:
ANSWER
Answered 2022-Feb-17 at 11:43You should have those two indexes to speed up your query :
QUESTION
I'm trying to create a sound using Fourier coefficients.
First of all please let me show how I got Fourier coefficients.
(1) I took a snapshot of a waveform from a microphone sound.
- Getting microphone: getUserMedia()
- Getting microphone sound: MediaStreamAudioSourceNode
- Getting waveform data: AnalyserNode.getByteTimeDomainData()
The data looks like the below: (I stringified Uint8Array, which is the return value of getByteTimeDomainData()
, and added length
property in order to change this object to Array later)
ANSWER
Answered 2022-Feb-04 at 23:39In golang I have taken an array ARR1 which represents a time series ( could be audio or in my case an image ) where each element of this time domain array is a floating point value which represents the height of the raw audio curve as it wobbles ... I then fed this floating point array into a FFT call which returned a new array ARR2 by definition in the frequency domain where each element of this array is a single complex number where both the real and the imaginary parts are floating points ... when I then fed this array into an inverse FFT call ( IFFT ) it gave back a floating point array ARR3 in the time domain ... to a first approximation ARR3 matched ARR1 ... needless to say if I then took ARR3 and fed it into a FFT call its output ARR4 would match ARR2 ... essentially you have this time_domain_array --> FFT call -> frequency_domain_array --> InverseFFT call -> time_domain_array ... rinse N repeat
I know Web Audio API has a FFT call ... do not know whether it has an IFFT api call however if no IFFT ( inverse FFT ) you can write your own such function here is how ... iterate across ARR2 and for each element calculate the magnitude of this frequency ( each element of ARR2 represents one frequency and in the literature you will see ARR2 referred to as the frequency bins which simply means each element of the array holds one complex number and as you iterate across the array each successive element represents a distinct frequency starting from element 0 to store frequency 0 and each subsequent array element will represent a frequency defined by adding incr_freq
to the frequency of the prior array element )
Each index of ARR2 represents a frequency where element 0 is the DC bias which is the zero offset bias of your input ARR1 curve if its centered about the zero crossing point this value is zero normally element 0 can be ignored ... the difference in frequency between each element of ARR2 is a constant frequency increment which can be calculated using
QUESTION
I have a simple Dockerfile with Python and NodeJS. I install pytest
, a local library and run tests:
ANSWER
Answered 2022-Jan-27 at 17:43I found a solution on pytest
GitHub: https://github.com/pytest-dev/pytest/issues/8960
your working directory is / so pytest is attempting to recurse through everything in the filesystem (probably not what you want!)
Added WORKDIR /tests/
to the Dockerfile and the issue is fixed.
QUESTION
I am unable to update my spring boot app to 2.6.0 from 2.5.7. It throws the following error.
...ANSWER
Answered 2021-Dec-07 at 19:14The problem is the password encoder. It is required to build the auto-configured UserDetailsService
that you inject in the contructor of the class.
You can break the cycle by making the bean factory method static
:
QUESTION
I've downloaded Android Studio from the official website, the one for M1 chip (arm).
Basically running it for the first time, the error is the following:
...ANSWER
Answered 2021-Nov-07 at 09:40This is what solved it for me on my M1.
- Go to Android Studio Preview and download the latest Canary build for Apple chip (Chipmunk). Don't worry this is just to get through the initial setup.
- Unpack it, run it, let it install all the SDK components, accept licenses, etc as usual.
- Once it's done, simply close it and delete it.
Now when you start your stable Android Studio (Arctic Fox) you should not see the error.
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Install 311
Copy .env.sample to .env and fill in the endpoint and keys
Get other API keys: Mapbox, Searchly, &c. and put them in .env
npm install
npx gulp watch
npm run dev
Visit http://localhost:3000/ in your browser
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