Abstract: A method and apparatus for multi-level data protection in a storage system. The storage system comprises a first storage device, a second storage device, and a third storage device, the method comprising: establishing a synchronous replication session between the first storage device and the second storage device so as to synchronously replicate data in the first storage device to the second storage device; establishing an asynchronous replication session between the first storage device and the third storage device so as to asynchronously replicate the data in the first storage device to the third storage device; and recovering the asynchronous replication by establishing an asynchronous replication session between the second storage device and the third storage device in response to a failure of the first storage device.

Abstract: Embodiments of the present disclosure provide a method and device for data duplication cutover. The method includes initiating duplication of initial data from a source device to a destination device, wherein the initial data are data of a file system stored on the source device upon the initiating. The method further includes, in response to completing the duplication of the initial data, updating a session associated with the file system. Furthermore, the method includes, after updating the session, triggering the source device and the destination device into a data unavailable state to perform duplication of delta data from the source device to the destination device, wherein the delta data are data of the file system changed during duplication of the initial data. Utilization of the cutover mechanism proposed in the present disclosure enables effective reduction of data unavailable period of time.

Abstract: A charge and discharge device (10) includes: a battery unit (110) in which m (m is an integer of 3 or more) battery cells (112) that are connected in series are grouped into plural groups (114) including n (n is an integer equal to or larger than 2 and smaller than m) battery cells (112) that are continuously arranged and a part of the battery cells (112) that belong to a certain group is shared by a different group; a cell balance unit (120) that is provided for each group (114) and uniformizes voltages of the battery cells (112) that belong to the group (114); and a control unit (130) that stops the operation of the cell balance unit (120), when a voltage difference of the battery cells (112) that belong to an arbitrary one of the groups (114) is within a predetermined value, and when a total average voltage in all the battery cells (112) and a partial average voltage which is an average voltage of the battery cells (112) that belong to the arbitrary group (114) satisfy a specific condition, the cell balanc

Abstract: This microgrid system (100) includes: a generator device (111) for outputting power; a plurality of sub-microgrids (110) that include utility customers (112) who consume power; a shared unit (120) connected to the plurality of sub-microgrids (110), and provided with a plurality of energy storage devices (121) for storing power; and a control device (130) that, when power outputted by the generator device (111) is to be stored in the energy storage devices (121), selects an energy storage device (121) as the storage destination for the power outputted by the generator device (111), in accordance with the respective status of the plurality of energy storage devices (121), and when power is to be supplied to utility customers (112), selects an energy storage device (121) as the supply source for supplying power to the utility customers (112), in accordance with the respective status of the plurality of energy storage devices (121).

Abstract: A method and device for dispatching replication tasks in a network storage device. For instance, a method of dispatching replication tasks in a network storage device includes: in response to receiving a request for replicating a plurality of sessions, dispatching a task for replicating a configuration session among the plurality of sessions to a first processing unit of the network storage device, the configuration session including configuration information describing a plurality of sessions; dispatching a plurality of tasks for replicating other sessions among the plurality of sessions except the configuration session to a plurality of second processing units different from the first processing unit; and in response to the first processing unit and the plurality of second processing units completing the respective tasks, aggregating results of replicating the plurality of sessions. With the technical solution of the present disclosure, processing efficiency can be improved and time can be saved.

Abstract: A method and device for managing sessions comprises obtaining first identification information of a first session of a plurality of sessions and group operation identification information of a group operation to be performed for the plurality of sessions, each of the plurality of sessions replicating, from a source of the session to a destination of the session, a file system or a management system that manages the file system; determining whether the first session meets a condition that a session is suitable to be selected as a managing session, the managing session managing the plurality of sessions to perform the group operation on the plurality of sessions; in response to the first session failing to meet the condition, obtaining second identification information of a second session of the plurality of sessions, the second identification information being different from the first identification information; and selecting the managing session based on the second identification information.

Abstract: A gas mixer includes a flow splitter and a base having an inlet portion and a mixing portion. The inlet portion has an air inlet, an air chamber, an at least one gas inlet, and an opening, communicating with each other. The air chamber has two opposite walls, which are inclined, and a distance therebetween gradually decreases from the air inlet to the opening. The gas inlet is located on one of the walls. The mixing portion has a mixing chamber communicating with the opening and a burner, respectively. The flow splitter is provided in the air chamber and located between the gas inlet and the air inlet. The flow splitter has at least one through hole facing one of the walls. Therefore, air and gas could be effectively premixed and outputted to the burner, whereby to accurately control the air-fuel ratio to enhance the combustion efficiency of the burner.

Abstract: A fluid-driven power device is provided, including two fixed plates and a plurality of vanes. The two fixed plates are spaced out a distance, and respectively have two inner surfaces face each other, wherein a central axis passes through centers of the two inner surfaces. The vanes are provided between the two fixed plates and around the central axis. Two connected ends of each vane are respectively connected to the inner surface of the two fixed plates. Each vane forms a spiral twist, and the torsion angle of each of the vanes is changed from a central portion between the two connected ends toward the two connected ends in a symmetrical manner. Whereby the vanes can rectify the fluid, and prevents the output fluid from forming turbulence which interferes with rotation of the power device. Therefore, the rotation speed and efficiency of the power device will be further improved.

Abstract: A gas mixer includes at least one outlet pipe and a base having an inlet portion and a mixing portion. The inlet portion has an air inlet, at least one gas inlet, and an air path. The air path communicates with the air inlet and the at least one gas inlet, and has an exit. The mixing portion has a mixing chamber communicating with the exit. The outlet pipe is engaged with the mixing portion of the base, and extends into the mixing chamber. The exit of the air path corresponds to a body of the outlet pipe. Therefore, air and gas can be effectively premixed and outputted to a burner, whereby to accurately control the air-fuel ratio to enhance the combustion efficiency of the burner.

Abstract: To monitor data duplication progress, embodiments of the present disclosure relate to a method and apparatus for determining data duplication progress in real-time. The method comprises initiating a duplication of data from a source system to a destination system. The method further comprises determining first duplication progress for an initial stage of the duplication, original data existing on the source system when the duplication is initiated being duplicated in the initial stage. Furthermore, the method further comprises determining, independently from the initial stage, second duplication progress for a delta stage of the duplication, delta data being duplicated in the delta stage and including at least data generated during the initial stage. The present disclosure develops a fine-grained monitoring mechanism of data duplication progress.

Abstract: A power storage system comprises the following: a battery unit in which a plurality of battery cells are connected; an acquisition unit for continuously acquiring, while the battery unit is discharging, (V) which represents the extent of the discharge from the battery unit and the temperature (T) of the battery unit when the degree of discharge is (V); a balancing unit for executing cell balancing by which a difference in amount of charging between battery cells is reduced; and a balancing control unit for controlling the balancing unit so that when a reference state is detected based on (V) and (T), cell balancing is not executed, in accordance with a result of the detected reference state.

Abstract: A combustor is provided, including a pipe and a burner tray. The pipe is transverse U-shaped, including a first pipe section and a second pipe section. The first pipe section has an inlet, and the second pipe section has an outlet extending along an axial direction thereof. The second pipe section has at least one reduced section, wherein a smallest sectional area in the reduced section is smaller than sectional areas on both sides of the reduced section. The burner tray is connected to the second pipe section, provided over the outlet, and has a plurality of flame holes which communicate with the outlet. Whereby, with the reduced section, the flow including gas could be evenly delivered to the burner tray. As a result, after the gas exhausted through the flame holes is ignited, the combustion range would be evener, which enhances the combustion efficiency.

Abstract: A burner includes a base and a combustion tray, wherein the base has an inlet pipe and two horn-shaped tubes. The horn-shaped tubes are connected to opposite sides of the inlet pipe, wherein each of the horn-shaped tubes respectively has a first section. A length of the first sections is no less than an inner diameter of the inlet pipe at where the horn-shaped tubes are connected to. The combustion tray is engaged with the base, and communicates with the horn-shaped tubes. Whereby, gas and air could be fully mixed while flowing through each of the first sections. The symmetrical horn-shaped tubes could direct the airflow to the combustion tray, where the airflow could be outputted from flame vents of the combustion tray, whereby to generate more even flame, and to enhance the heating efficiency.

Abstract: A stereo image depth map generation device that includes a depth calculation module, a first order bilateral filter module and a second order bilateral filter module is provided. The depth calculation module receives a reference image including a plurality of reference pixels and a target image including a plurality of target pixels to generate an initial depth map according to pixel differences of the reference pixels and the target pixels. The first order bilateral filter module receives the initial depth map to perform a first order bilateral filtering calculation according to the initial depth map and the initial depth map itself to generate an averaged depth map. The second order bilateral filter module receives the averaged depth map and the target image to perform a second order bilateral filtering calculation according to the averaged depth map and the target image to generate a refined depth map.

Abstract: A battery control device includes: a measurement unit that individually measures an amount of discharging current of each discharging secondary battery of discharging secondary batteries among a plurality of secondary batteries which are independently charged and discharged; a time calculating unit that calculates time required for discharging said each discharging secondary battery until said each discharging secondary battery reaches a constant battery capacity based on a discharging current rate for said each discharging secondary battery which is calculated based on the amount of discharging current, and a state of charge (SOC) of said each discharging secondary battery; a number calculating unit that calculates an expected number of charging secondary batteries among said plurality of secondary batteries, which become fully charged in a required time, based on a charging current rate for each charging secondary battery of charging secondary batteries among said plurality of secondary batteries which is c

Abstract: A system includes an activity measuring device that measures an activity of a person existing in an area; an output measuring device that measures an output generated by the activity of the person; an activity real state detection unit that detects a current activity state of the person, based on a measurement result by the activity measuring device; an activity optimum state detection unit that detects an optimum activity state from among a plurality of past activity states of the person causing the output to be generated, based on past measurement results by the activity measuring device and the output measuring device; and an activity state mapping unit that generates an analysis result in which the detected current activity state of the person is associated with the optimum activity state.

Abstract: A method and apparatus for multi-level data protection in a storage system. The storage system comprises a first storage device, a second storage device, and a third storage device, the method comprising: establishing a synchronous replication session between the first storage device and the second storage device so as to synchronously replicate data in the first storage device to the second storage device; establishing an asynchronous replication session between the first storage device and the third storage device so as to asynchronously replicate the data in the first storage device to the third storage device; and recovering the asynchronous replication by establishing an asynchronous replication session between the second storage device and the third storage device in response to a failure of the first storage device.

Abstract: A volume holographic imaging system, apparatus, and/or method enables the projection of a two-dimensional (2D) slice of a four-dimensional (4D) probing object. A 4D probing source object is illuminated to emit or scatter an optical field. A holographic element having one or more recorded holograms receives and diffracts the optical field into a diffracted plane beam having spectral information. A 4-f telecentric relay system includes a pupil filter on the relayed conjugate plane of the volume hologram and images the pupil of the volume hologram onto the front focal plane of the collector lens. A collector lens focuses the diffracted plane beam to a 2D slice of the 4D probing source object. The focused 2D slice is projected onto a 2D imaging plane. The holographic element may have multiple multiplexed holograms that are arranged to diffract light from the corresponding slice of the 4D probing source object.

Abstract: A volume holographic imaging system, apparatus, and/or method enables the projection of a two-dimensional (2D) slice of a four-dimensional (4D) probing object. A 4D probing source object is illuminated to emit or scatter an optical field. A holographic element having one or more recorded holograms receives and diffracts the optical field into a diffracted plane beam having spectral information. A 4-f telecentric relay system includes a pupil filter on the relayed conjugate plane of the volume hologram and images the pupil of the volume hologram onto the front focal plane of the collector lens. A collector lens focuses the diffracted plane beam to a 2D slice of the 4D probing source object. The focused 2D slice is projected onto a 2D imaging plane. The holographic element may have multiple multiplexed holograms that are arranged to diffract light from the corresponding slice of the 4D probing source object.

Abstract: A battery control device (100) includes: a measurement unit (110) that measures a voltage of a secondary battery; a control unit (120) that initiates a charging process of performing charging until the voltage of the secondary battery reaches a second reference value greater than a first reference value in a case where a voltage measured by the measurement unit (110) is less than the first reference value; and an adjustment unit (130) that receives a degree of deterioration of the secondary battery as first adjustment information that becomes a reference for adjustment of a hysteresis width that is determined on the basis of the first reference value and the second reference value, and adjusts the hysteresis width on the basis of the first adjustment information that is received.