A: Wavelet transforms store large fractions of the strongest of the wavelet coefficients.
B: The DWT decomposes each segment of time series via the successive use of low-pass and high-pass filtering at appropriate levels.
C: Wavelet transforms can be used for reducing data and smoothing data.
D: Wavelet transforms means applying to pairs of data, resulting in two set of data of the same length.
举一反三
- Which one is right about wavelet transforms? A: Wavelet transforms store large fractions of the strongest of the wavelet coefficients. B: Wavelet transforms are completely different from discrete Fourier transform (DFT). C: Each transform has 2 functions: smoothing, difference. D: Wavelet transforms means applying to pairs of data, resulting in two set of data of length L.
- A(n) ___ is a graphic that transforms numerical data into a more visual representation.
- Which is used to store and process a set of values, all of the same data type, that forms a logical group? A: data structure B: array C: primitive data type D: atomic data type
- A developer chooses to avoid using SingleThreadModel but wants to ensure that data is updated in athread-safe manner. Which two can support this design goal？（） A: Store the data in a local variable. B: Store the data in an instance variable. C: Store the data in the HttpSession object. D: Store the data in the ServletContext object. E: Store the data in the ServletRequest object.
- If a is known to be a 2×3 matrix, then after executing a=a(:), ( ). A: a transforms to a column vector B: a transforms to 3 rows and 2 columns C: a transforms to 3 rows and 3 columns D: a transforms to 2 rows 3 and columns
内容
- 0
The 2-D DFT can be computed by computing 1-D DFT transforms along the rows of the image, followed by 1-D transforms along the columns of the result.
- 1
Which of the followings are correct about difference-in-difference(DID) quasi-experiment study? A: time series data can be used for DID analysis B: panel data can be used for DID analysis C: DID analysis compares the changes over time in an outcome of the treatment group to changes over the same time period in the outcome of the control group. D: DID analysis is the changes over time in an outcome of the treatment group
- 2
Big data can be used to process verycomplex data.
- 3
Data can be generally divided into analog data and digital data.
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Which is not right about medical record( ) A: Record all pertinent data, avoid extraneous data. B: Use standard format C: Describe comprehensively D: Accurate E: Writing time is not required