IEEE Systems, Man and Cybernetics Magazine - January 2020 - 20

similarity between the current input and the target
state, the greater the weight that will be assigned to the
current input. Moreover, the softmax function is intro-
duced to calculate the output of parameter a t, which is
defined as
at =

exp(n T y t)
T

| exp(n

T

y t)

.

(7)

t=1

Therefore, the attention model's output is
T

z = | at yt .

(8)

t=1

A different wave signal in the time domain corre-
sponds to a different weight. In an area with concen-
trated emotional information, a t is large, whereas in a
blank frame or in an area without emotional infor-
mation, a t is small. Basic acoustical features are
mapped to be discrete, emotion feature labels through
the pooling layer, a nd softma x through RNN a nd
attention computing.

Testbed and Experiment
System Testbed
We built a testbed for the CreativeBioMan system, which
included brain-wearable devices, a wearable-clothing
expressive robot, and a data center in the cloud, as dis-
played in Figure 3. For brain wave signal collection, we
chose Texas Instruments' ADS1299-8 and CH559L as the
chip and main control chip, respectively. The wearable-
clothing expressive robot integrated the AIWAC box, the
intelligent drawing board, and the MIC voice collection
module. Wireless communication was used for data com-
munication with the whole system. The Inspur Big Data
Center in the cloud was equipped with two management
nodes and seven data nodes. A data amount of 253 TB
could be saved onto it, which offered a sufficient hardware
guarantee to the real-time computing and analysis of the
AI algorithm.
The EEG signal-sampling frequency was 512 Hz, and
the EEG signal was collected in three creation processes
for each test subject. Simultaneously, a user's emotion

Speech
Emotion Data
Content Data

EEG
(b)
(c)

(a)

(d)

Figure 3. The CreativeBioMan system testbed. The (a) real brain and body devices, (b) collected data,
(c) cloud, and (d) generated artwork.
20

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IEEE Systems, Man and Cybernetics Magazine - January 2020

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