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bme240 > matlab 3.2 > Flashcards

matlab 3.2 Flashcards

1
Q

interpolation

A

test other conditions to account for other possibilities, keeps the shape of the graph but smooths transition by reducing errors

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2
Q

interp1(x, y, 3.4)

A

checks data and estimate y at x = 3.4

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3
Q

cubic spline interpolation

A

smooths the curve and minimizes error

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4
Q

linear regression

A

predicting the value of a variable based on value of other variables

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5
Q

least squares fitting

A

finds best fit for data points by determining slope and intersection
minimize R

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6
Q

resistance and current are ___ proportional to each other in electrical circuits

A

inversely

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7
Q

I = ?

A

V/R
current is equal to voltage over resistance

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8
Q

bioengineers

A

engineers that work in context of living or hybrid systems

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9
Q

bioengineers use…

A

traditional engineering and knowledge of biology and medicine (biomaterials, bioinstrumentation, biosignal processing)

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10
Q

system

A

any assembly of things that have a collective effect on the signal of interest

dumbed down:
stuff that effects what’s being recorded

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11
Q

model

A

a representation of the original, aids in description of a body of data
more compact and helps gain insights

dumbed down: represents original and helps us describe the data and gain interests

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12
Q

models can allow one to ___ the outcome of intermediate experiments

A

predict

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13
Q

model is a symbolic representation of…

A

a process, system, or collection of data

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14
Q

system identification and model formulation are ___ processes

A

iterative (it repeats over and over)

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15
Q

process of system identification and model formation

A

measure, build model, test model, REPEAT

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16
Q

what improves our observation of biological systems?

A

technological advancement

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17
Q

how does tech advancement improve our observation of bio systems?

A

greater accuracy
greater precision
less invasive

results in better models

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18
Q

what are the most valuable characteristics of a bioengineer?

A

artful construction and effective use of models

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19
Q

biosignal

A

lets us interact/communicate with biosystems

20
Q

what are signals?

A

variations of energy that carry information

21
Q

types of signals

A

electrical, mechanical, thermal, optical, chemical, bio

22
Q

biosignals can be ___ directional to know the state of the system

A

one directional

23
Q

input-output system

A

send signal to the system for therapy or experimentation

24
Q

input -> physiological systen -> output
what is the input and output

A

stimulus and response

25
Q

chemical energy

A

variables: chemical activity and/or concentration
measurements: blood ion, O2, CO2, pH, horomonal concentrations, and otehr chemistry

26
Q

mechanical energy

A

variables: position, force, torque, or pressure
common measurements: muscle movement, cardiovascular pressures, muscle contracility, valve and other cardiac sounds

27
Q

electrical energy

A

variables: voltage (potential energy of charge carriers), current (charge carrier flow)
common measurements: EEG, ECG, EMG, EOG, etx

28
Q

thermal energy

A

variables: temperature
common measurements: body temperature

29
Q

communications inside the body are encoded in variations of ___ and ___ energy

A

electrical: flow or concentration of ion
chemical: variation of concentrations in blood (ex: hormones)

30
Q

in the outside world all communication is converted to ____ based signals

A

electrical

31
Q

transducer

A

device that converts energy from one form to another

32
Q

biotransducers

A

convert non-electrical energy to an electrical signal

33
Q

electrode converts ___ energy to an ____ signal

A

ionic energy to electronic signal

34
Q

purpose of biomedical transducers

A

convert energy in physioloical processes into energy that can be measured, displayed, and stored

35
Q

cardiac microphone

A

converts mechanical sound energy from heart into electrical signal

36
Q

sensitivity

A

change in output for a given change in input
change in y / change in x

37
Q

resoluion

A

smallest change in input that results in measurable changes in output

38
Q

linearity

A

consistency of the input-output relationship

39
Q

repeatability

A

expected difference in output for repeated measurements of same input

40
Q

noise

A

amount of change in output not related to change in input

41
Q

ECG

A

electrocardiogram (heart)

42
Q

EEG

A

electroencephalogram (brain)

43
Q

EMG

A

electromyogram (muscle)

44
Q

EOG

A

electrooculogram (eye)

45
Q

ERG

A

electrotrtinogram (retina)

46
Q

EGG

A

electrogastrogram (stomach)

47
Q

GSR

A

galvanic skin response (skin electrical activity)

bme240 (12 decks)

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