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KwickClips Artificial Intelligence

Artificial Intelligence: 203 short revision clips (page 3)

One idea per clip, with the answer written out underneath. Each clip links back to the full Artificial Intelligence lesson it came from.

Python code: m, c = 9.6, 41.0; x = 2.5; print(m * x + c) outputs 65.0.What is the prediction for 2.5 hours?36 secTable: regression gives a number, classification gives a category.Price of a used scooter?40 secTable of classification examples: email, payment, leaf photo and their labels.What is the output of classification?39 secThree steps of k-NN voting.What does k mean in k-NN?39 secRules for choosing k: too small, too large, odd k.Is k = 1 risky?41 secTable of three nearest fruits to (5, 5) with distances and labels.Which fruit wins with k = 3?40 secTable: labels given no, learning unsupervised, groups from data.Can a computer find groups without labels?40 secTable of centroid positions for start, round 1 and round 2.Where does a centroid move?39 secElbow table: k 1 spread 5000, k 2 1200, k 3 900.Which k does the elbow suggest here?40 secList of clustering uses: customer groups, news stories, bank payments.How do shops use clustering?40 secDecision tree flowchart: raining, homework done, play or stay home.What does the root do?41 secSteps of splitting: try each question, check purity, keep the purest.What is a pure group?37 secPath through the learned tree for a sunny day with homework done.Where do you start reading?38 secTable of decision tree strengths and weaknesses.What is the catch with decision trees?39 secTable: greyscale 0 to 255, colour R G B values, photo as a grid of pixels.What does a computer see in a photo?40 secFlow of vision steps: capture, clean, features, detect, understand.What is the first step?37 secTable of computer vision uses: face unlock, medical scans, self-driving cars.Is face unlock computer vision?41 secList of computer vision challenges: lighting, bias, privacy and deepfakes.How does poor light affect vision AI?41 secTable of resolutions with pixel counts in lakh.What does resolution count?39 secTable of pixel values: greyscale 0 to 255, RGB 3 values, yellow 255 255 0.Why do pixel values stop at 255?40 secList of image features: edges, corners, blobs.What is an edge?40 secKernel 1, -1 on values 9, 9, 0 giving 0 on the left and 18 on the right.What are the three steps?40 secTable of input counts for grey and colour 100 by 100 images.How many inputs for a 100 x 100 grey image?38 secTable of CNN layers: convolution, pooling, flatten and their jobs.What does pooling do?38 secTable: early layers edges, middle layers ears and eyes, deep layers cat face.What does a CNN see first?41 secList of CNN applications: face unlock, X-ray screening, crop disease apps.Name one CNN use in health.38 secCode: pip install opencv-python, then import cv2.Why does import opencv fail?38 secCode: imread, imshow, waitKey and resize to (400, 300).Why did my resized photo stretch?41 secCode: imread, COLOR_BGR2GRAY and cvtColor.Why turn photos grey first?41 secCode: imread grey, blur, Canny, imwrite edges.jpg.What does the 0 in imread do?40 secThree reasons language is hard: many meanings, word order, sarcasm and mixing.Why does 'He hit the bat' confuse a computer?44 secList of five NLP phases with what each checks.Which phase checks grammar?43 secTable of NLP applications: translation, assistants, spam filter.Is a spam filter NLP?40 secTable of AI domains and their data: numbers, images, text and speech.What data does NLP use?43 secList of text normalisation steps in order.What comes after sentence segmentation?46 secTable: studies to studi or study, caring to car or care.What is the stem of 'studies'?42 secBag of Words table with counts for three short documents.What is the first step?38 secTF-IDF table: the scores 0, cricket scores 0.477 with N = 3.Why does 'the' score zero?42 secTable comparing script bots and smart bots.Does a script bot learn?43 secPython code for a keyword chatbot printing Hello!What does get() do if the key is missing?39 secTable of reviews with sentiment labels.What are the three labels?41 secLimits of emotion AI: hidden sadness, cultural differences, consent.Is an emotion AI result a fact?42 secCode: z = 1*0.7 + 1*(-0.9) + 0.1; print(1 if z > 0 else 0) outputs 0.What does z come to?43 secTable of three layers: input, hidden, output and their jobs.Why is the middle layer called hidden?40 secLearning loop: forward pass, compare, backpropagation.What weights does a network start with?41 secTable: CNN images, RNN text and speech, GAN new images.Which network creates new images?45 secTable: TensorFlow the engine, Keras the easy layer API.Who makes TensorFlow?40 secKeras code: Sequential with Flatten, Dense 64 relu and Dense 10 softmax.What does Flatten do?40 sec

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