Abstract: A double gap double coil driven speaker includes a diaphragm, a permanent magnet having a magnetization, and a magnetic flux conducting device having a magnetic flux conducting path. The magnetic flux conducting device and the permanent magnet together form a magnetic flux loop, wherein the magnetic flux loop has two gaps, and directions of magnetic fields generated in the two gaps are opposite to each other. The speaker further includes a voice coil having two coils wound on an outer surface of the voice coil and the voice coil having one end connected to the diaphragm, wherein the two coils are respectively accommodated in the two gaps. When the two coils conduct currents, the voice coil is displaced to push the diaphragm, wherein, relative to a common cross section of the two gaps, the currents respectively flowing through the two coils are in opposite directions.

Abstract: A pickup diaphragm includes a pickup part, a suspension edge and an outer edge, wherein the pickup part includes a non-planar surface. The suspension edge includes a deformable surface, with a joint surface being respectively configured on the inner and outer sides of the deformable surface, and the joint surface on the inner side being fixedly connected to the periphery of the non-planar surface. In addition, the outer edge includes a ring groove, in which one side of the ring groove is set as a connection end while the other side thereof is set as an opening end, the inner side of the connection end is fixedly connected to the joint surface located on the outer side, and a stethoscope head can be inserted through the opening end such that the ring groove is placed in sleeve on the outside of the stethoscope head.

Abstract: A pickup diaphragm includes a pickup part, a suspension edge and an outer edge, wherein the pickup part includes a non-planar surface. The suspension edge includes a deformable surface, with a joint surface being respectively configured on the inner and outer sides of the deformable surface, and the joint surface on the inner side being fixedly connected to the periphery of the non-planar surface. In addition, the outer edge includes a ring groove, in which one side of the ring groove is set as a connection end while the other side thereof is set as an opening end, the inner side of the connection end is fixedly connected to the joint surface located on the outer side, and a stethoscope head can be inserted through the opening end such that the ring groove is placed in sleeve on the outside of the stethoscope head.

Abstract: A method of building a decoding status prediction system is provided. Firstly, plural read records are collected during read cycles of a flash memory. Then, the plural read records are classified into read records with a first read result and read records with a second read result. Then, a first portion of the read records with the first read result are divided into K0 groups according to a clustering algorithm, and a second portion of the read records with the second read result are divided into K1 groups according to the clustering algorithm. Then, the read records of the K0 groups and the K1 groups are used to train prediction models. Consequently, K0×K1 prediction models are generated. Then, the prediction models are combined as a prediction database.

Abstract: A method of building a decoding status prediction system is provided. Firstly, plural read records are collected during read cycles of a flash memory. Then, the plural read records are classified into read records with a first read result and read records with a second read result. Then, a first portion of the read records with the first read result are divided into K0 groups according to a clustering algorithm, and a second portion of the read records with the second read result are divided into K1 groups according to the clustering algorithm. Then, the read records of the K0 groups and the K1 groups are used to train prediction models. Consequently, K0×K1 prediction models are generated. Then, the prediction models are combined as a prediction database.

Abstract: A voice emitting device of a speaker is provided. The magnetic vibration element is a larger diameter and thus has a greater driving force. In use, if a greater voice is needed, the structure provided may achieve the effect without operation at full power. Because even the voice emitting device is not worked in full power, the sound quality is good. Furthermore, because the magnetic vibration element of the voice emitting device is larger, a longer impact length is provided. Therefore the response in a low frequency is good and thus the sound quality in lower frequency is not affected.

Abstract: A voice emitting device of a speaker is provided. The magnetic vibration element is a larger diameter and thus has a greater driving force. In use, if a greater voice is needed, the structure provided may achieve the effect without operation at full power. Because even the voice emitting device is not worked in full power, the sound quality is good. Furthermore, because the magnetic vibration element of the voice emitting device is larger, a longer impact length is provided. Therefore the response in a low frequency is good and thus the sound quality in lower frequency is not affected.

Abstract: A dental brace includes a plurality of pairs of bracket and sliding cover. The bracket includes an attaching base attached to a tooth, a support extending upward obliquely from the attaching base, a top jaw, a transverse groove in the support, two side inclined grooved rails on the support, and a projecting abutment member. On a recessed, inclined surface of the support there are provided a transverse ridge and a shoulder below the ridge. The sliding cover comprises a latch extending downward from an upper end. The groove is open when the latch is stopped by the shoulder so as to permit an arch wire to dispose in the grooves. The groove is concealed by the sliding cover when the latch is urged against an inclined surface of the ridge so as to position the arch wire in the grooves.

Abstract: An improved structure of a speaker comprises a cone frame, a surround and a diaphragm, wherein a circumference of the diaphragm is sealed to an edge of an opening of the cone frame. A container portion is disposed on an inner side of the opening of the cone frame. The surround is disposed between the diaphragm and the container portion of the cone frame. Therefore, when an audio-frequency electrical signal is coupled with a voice coil inside the cone frame, the voice coil outputs an audio signal to drive the diaphragm to move and generate a sound. The present invention uses the surround to let the diaphragm move up and down with less resistance, which helps the diaphragm move more smoothly and reduces a distortion of sounds and increases the sensitivity of sound pressure level by enlarging the diaphragm moving area.