## 4 Experimental Setup  
### Dataset Description  
This section provides a introduction to the six public datasets used in this paper, Ninapro DB4 [30], Ninapro DB5 [30], BioPatRec DB1 [31], BioPatRec DB2 [31], BioPatRec DB3 [31], and Mendeley Data [32]. The above dataset captures the hand and wrist movement gestures. As indicated in [33], the hand gestures is distinguished between static and dynamic. The primary distinction lies in the fact that static movements do not alter the finger angles, whereas dynamic movements involve changes in finger angles as the hand moves. Based on this description, the motions within the selected datasets exclusively fall under the category of static hand gestures. Here, is a brief overview of each analyzed dataset:  
1. Ninapro DB4: In the dataset, the sEMG signals are collected from 10 subjects. Each subject is recorded 53 motions and divided into three groups: exercises A, exercises B and exercises C. The exercises A consists of basic fingers movements. The exercises B includes the multiple finger flexion and extensor with wrist gestures. The exercises C set consists of grasping the common daily objects. The duration of each movement is 5 s, followed by a 3 s rest, with six repetitions of each motion. Ninapro DB4 contains 12 channels. Columns 1-8 are the electrodes equally spaced around the forearm at the height of the radio humeral joint. Columns 9 and 10 contain signals from the main activity spot of the muscle flexor and extensor digitorum superficialis, while columns 11 and 12 contain signals from the main activity spot of the muscle biceps brachii and triceps brachii.
2. Ninapro DB5: In this dataset, sEMG signals are acquired from 10 subjects. The hand gestures are identical to those in NinaPro DB4, with the primary distinctions being the number of channels and sampling frequency. Ninapro DB5 contains 16 channels, columns 1-8 are the electrodes equally spaced around the forearm at the height of the radio humeral joint. Columns 9-16 represent the second Myo, tilted by 22.5 degrees clockwise.
3. BioPatRec DB1: This dataset contains 10 hand and wrist movements collected from 20 subjects. It is including of hand open/close, wrist flex/extend, pro/supination, fine/side grip, pointer (index extension), and agree or thumb up. Each movement has three repetitions and rests for 3 s after a duration of 3 s.
4. BioPatRec DB2: This dataset is collected from 17 subjects including 26 hand activities. It is similar to BioPatRec DB1, except for fine/side grip, pointer (index extension), and agree or thumb up. The duration of each motion is 3 s, followed by 3 s rest, with three repetitions.
5. BioPatRec DB3: This dataset is collected from eight subjects including ten movements with three different devices. The hand gestures are same as BioPatRec DB1. The duration of each hand gesture is 3 s long with 3 s resting in between two motions and three repetitions. BioPatRec DB1, DB2, and DB3 have four, eight, and four electrodes, respectively. The diameter of the electrodes is 1 cm, and the distance between the electrodes of the dipole is 2 cm. The electrodes are equidistantly distributed around the most proximal third of the forearm.
6. Mendeley Data: The dataset records 10 different hand gestures from 40 subjects. The hand gestures performed by the subjects are rest, extension/flexion of the wrist, radial deviation of the wrist, grip, abduction/adduction of all fingers, supination, and pronation. The duration of each gesture is 4 s long with 4 s resting in between two hand gestures and five repetitions. The four electrode positions of Mendelay are Extensor Carpi Ulnaris, Flexor Carpi Ulnaris, Extensor Carpi Radialis, and Flexor Carpi Radialis.