Engineering, 25.02.2020 17:55 182075
Overview An n-gram -- in the context of parsing natural languages such as English -- is a sequence of n consecutive tokens (which we might define as characters separated by whitespace) from some passage of text. Based on the following passage: I really really like cake. We have the following 2-grams: [('I', 'really'), ('really', 'really'), ('really', 'like'), ('like', 'cake.')] And the following 3-grams: [('I', 'really', 'really'), ('really', 'really', 'like'), ('really', 'like', 'cake.')] (I omit a 1-gram listing because it would merely be a list of all tokens in the original text.) Among other things, n-grams are useful for describing the vocabulary of and statistical correlation between tokens in a sample body of text (e. g., as taken from a book). We can use an n-gram model to determine the likelihood of finding a particular sequence of words after another. This information, in turn, can be used to generate passages of text that statistically mimic the sample. We can convert the above 3-gram list into the following lookup structure (i. e., a dictionary mapping strings to lists of 2-tuples), where the first token of each n-gram maps to all sequences that follow it in the text:
Answers: 1
Engineering, 04.07.2019 18:10
An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet
Answers: 3
Engineering, 04.07.2019 18:10
Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented
Answers: 2
Engineering, 04.07.2019 18:20
Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?
Answers: 2
Engineering, 04.07.2019 19:10
10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.
Answers: 2
Overview An n-gram -- in the context of parsing natural languages such as English -- is a sequence o...
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