Abstract: The present invention discloses a data storage system using a solid state disk to replace a non-volatile memory. The data storage system comprises a plurality of controllers, a first storage unit and a second storage unit. The plurality of controllers are electrically connected with each other, and are capable of storing data into said storage units and restoring data from said storage units. When a controller receives the data transmitted from a remote device, a data journal is generated and stored into the first storage unit. After a message of “successfully received” is sent back to the remote device, the data is transferred to the second storage unit.

Abstract: In the present invention, we identify that such a tradeoff between robustness to background changes and sensitivity to foreground abnormalities can be easily controlled by a new computational scheme of two-type learning rate control for the Gaussian mixture modeling (GMM). Based on the proposed rate control scheme, a new video surveillance system that applies feedbacks of pixel properties computed in object-level analysis to the learning rate controls of the GMM in pixel-level background modeling is developed. Such a system gives better regularization of background adaptation and is efficient in resolving the tradeoff for many surveillance applications.

Abstract: To construct a video surveillance system, the Gaussian mixture modeling (GMM) is a popular choice among various background modeling approaches, for its capability of adaptation to background variations. However, the GMM often suffers from a tradeoff between robustness to background changes and sensitivity to foreground abnormalities, and is inefficient in managing the tradeoff for diverse surveillance scenarios. In the present invention, we identify that such a tradeoff can be easily controlled by a new computational scheme of two-type learning rate control for the GMM. Based on the proposed rate control scheme, a new video surveillance system that applies feedbacks of pixel properties computed in object-level analysis to the learning rate controls of the GMM in pixel-level background modeling is developed. Such a system gives better regularization of background adaptation and is efficient in resolving the tradeoff for many surveillance applications.

Abstract: Surveillance systems often encounter great challenges from lighting variations, especially for those inspecting outdoor environments. To construct a surveillance system robust to various background scene changes, including lighting variations, a strategy of background model learning is widely adopted. Based on this strategy, many approaches have been proposed in decades to represent background scenes by statistical models and to adapt background changes over time into the models. However, the focus of most background model learning research is put on adaptation of scene vibrations in to background, as well as of gradual lighting variations. For the background model adaptation to drastic lighting changes, many background model learning approaches are often inefficient. As a result, false alarms in foreground detection are issued under such quick lighting changes. To suppress this kind of false alarms, a new system design of background model learning is proposed.

Abstract: A locked warning apparatus used for a handle of a hard disk drive bracket is described. The locked warning apparatus includes a locking base, a locking device, an upper cover assembly, and a pressing unit. The locking base has a clasping portion and an elastic protrusion. The locking device has a blocking portion. The clasping portion of the locking base is fastened to the locking device in a form of line-surface interface contact. The blocking portion reciprocates a back and forth motion on the elastic protrusion of the locking base to allow the locking device to retain either a lock status or an unlock status correspondingly. When the locking device retains the lock status, the locking device buckles the upper cover assembly. When the locking device retains the unlock status, the upper cover assembly can be ejected from the locking base by pushing the pressing unit.

Abstract: The present invention is to provide a method for reconstructing data in case of failure of two HDs of a RAID, wherein the RAID is a logical disk drive assembly including at least three HDs and a RAID controller and data is divided into block strips which are stored on data blocks of different HDs respectively, The method comprises the steps of reading super blocks of all of the HDs; comparing the number of the HDs and time being involved in a previous operation and stored in the super blocks with each other; reading common data involved in the previous degraded operation of the RAID; writing the read common data into the super blocks of all of the HDs; and recovering a configuration of the RAID to the degraded mode again.

Abstract: The present invention is to provide a method for reconstructing data in case of failure of two HDs of a RAID, wherein the RAID is a logical disk drive assembly including at least three HDs and a RAID controller and data is divided into block strips which are stored on data blocks of different HDs respectively, The method comprises the steps of reading super blocks of all of the HDs; comparing the number of the HDs and time being involved in a previous operation and stored in the super blocks with each other; reading common data involved in the previous degraded operation of the RAID; writing the read common data into the super blocks of all of the HDs; and recovering a configuration of the RAID to the degraded mode again.