Abstract: Disclosed deduplication techniques at a distributed data storage system guarantee that space reclamation will not affect deduplicated data integrity even without perfect synchronization between components. By understanding certain “behavioral” characteristics and schedule cadences of backup operations that generate backup copies received at the distributed data storage system, data blocks that are not re-written by subsequent backup copies are pro-actively aged, while promoting continued retention of data blocks that are re-written. An expiry scheme operates with block-level granularity. Each unique deduplicated data block is given an expiry timeframe based on the block's arrival time at the distributed data storage system (i.e., when a backup copy supplies the block) and further based on backup frequencies of the various virtual disks referencing a unique system-wide identifier of the block, which is based on the block's hash value. Communications between components are kept to an as-needed basis.

Abstract: Disclosed deduplication techniques at a distributed data storage system guarantee that space reclamation will not affect deduplicated data integrity even without perfect synchronization between components. By understanding certain “behavioral” characteristics and schedule cadences of backup operations that generate backup copies received at the distributed data storage system, data blocks that are not re-written by subsequent backup copies are pro-actively aged, while promoting continued retention of data blocks that are re-written. An expiry scheme operates with block-level granularity. Each unique deduplicated data block is given an expiry timeframe based on the block's arrival time at the distributed data storage system (i.e., when a backup copy supplies the block) and further based on backup frequencies of the various virtual disks referencing a unique system-wide identifier of the block, which is based on the block's hash value. Communications between components are kept to an as-needed basis.

Abstract: A passenger tracking system includes a multiple of sensors for capturing depth map data of objects. A processing module in communication with the multiple of sensors to receive the depth map data, the processing module uses the depth map data to track an object and calculate passenger data associated with the tracked object to generate a passenger tracking list that tracks each individual passenger in the passenger data from an origin lobby to a destination lobby and through an in-car track between the origin lobby and the destination lobby.

Abstract: A passenger tracking system includes a multiple of sensors for capturing depth map data of objects. A processing module in communication with the multiple of sensors to receive the depth map data, the processing module uses the depth map data to track an object and calculate passenger data associated with the tracked object to generate a passenger tracking list that tracks each individual passenger in the passenger data from an origin lobby to a destination lobby and through an in-car track between the origin lobby and the destination lobby.

Abstract: A discrete element method for modelling fracture evolution of roadway surrounding rock is provided, which includes: taking rock cores from a coal seam in the field and recording RQD values, observing roadway deformation, and making a statistical analysis on distribution characteristics of fractures in the coal seam; testing mechanical parameters of coal-rock samples indoors, and calculating strength of a rock mass according to the RQD values; creating a numerical model by using a UDEC-Trigon module to adjust the parameters to match the strength of the rock mass, and correcting model parameters; and creating a numerical model of an engineering scale to adjust the parameters to match field deformation characteristics, and finally simulating fracture evolution of the roadway surrounding rock. The present invention provides accurate and basic mechanical parameters for discrete-element numerical simulation of roadway deformation, guaranteeing realistic and reliable simulation results.

Abstract: A method and an apparatus for Bluetooth connection are disclosed. A first Bluetooth connection can be established between a first node of multiple data receiving nodes and a data source, the multiple data receiving nodes can share a data packet transmitted by the data source via the first Bluetooth connection, and a second node can be selected according to a preset rule from among the multiple data receiving nodes to feed back a response signal to the data source. In a method and an apparatus, the multiple data receiving nodes can be regarded as a whole, which share a data packet transmitted from the data source and jointly maintain the first Bluetooth connection, and only one of the multiple data receiving nodes is selected to feed back a response signal. Conforming to Bluetooth communication protocols, a method and an apparatus can meet the demanding requirements on hardware resources of a Bluetooth connection among a data source and multiple data receiving nodes.

Abstract: A nonlinear disturbance rejection control apparatus and method for electronic throttle control systems are invented to control the electronic throttle system and to achieve a continuous finite-time disturbance rejection control goal. A control sub-apparatus and method are proposed with an observing sub-apparatus and method for controlling the opening angle of an electronic throttle valve. A mathematical model of the electronic throttle system is analyzed and a control-oriented model is presented with the formation of a lumped disturbance. With combination of the continuous terminal sliding mode control method and the output feedback control method, based on the finite-time high-order sliding mode observer, the preferred control performance is guaranteed, where both the dynamic and static performance of the system is effectively improved.

Abstract: The present disclosure relates to the technical field of food equipment design and processing, and provides a high-efficiency water-saving separation screen for starch slurry and residue which includes a horizontal screen drum, a screen mesh, a screw propelling extrusion rod, a rotation drive unit and a flushing spray pipe; one side of the horizontal screen drum is provided with a feeding inlet, and the other side of the horizontal screen drum is provided with a slurry outlet and a residue outlet; the screen mesh is in a cone shape, and the cross-sectional diameter of the screen mesh gradually decreases from the feeding inlet to the residue outlet; the screw propelling extrusion rod is arranged in the screen mesh and includes a screw propelling extrusion rod shaft and a screw blade; the rotation drive unit drives the screen mesh and the screw propelling extrusion rod to rotate in opposite directions; and the flushing spray pipe is used for flushing slurry and residue on the screen drum.

Abstract: The invention describes a method of performing automatic commissioning of a network (N) comprising a plurality of network devices (10, 11, 12, 13), wherein each device (10, 11, 12, 13) is characterised by a device identifier (14) and wherein the devices (10, 11, 12, 13) are realised to exchange data packets (2), which method comprises the steps of obtaining a computer-readable installation plan (3) for the network (N), which installation plan (3) comprises a physical location descriptor (31) for devices (10, 11, 12, 13) of the network (N); deducing the network topology (T) of the network (N) from network descriptive information (40, 41, 42, 43) provided by the devices (10, 11, 12, 13) on the basis of data packets (2) exchanged between the devices (10, 11, 12, 13); and comparing the deduced network topology (T) to the installation plan (3) to allocate a physical location descriptor (31) to a device identifier (11).

Abstract: A discrete element method for modelling fracture evolution of roadway surrounding rock is provided, which includes: taking rock cores from a coal seam in the field and recording RQD values, observing roadway deformation, and making a statistical analysis on distribution characteristics of fractures in the coal seam; testing mechanical parameters of coal-rock samples indoors, and calculating strength of a rock mass according to the RQD values; creating a numerical model by using a UDEC-Trigon module to adjust the parameters to match the strength of the rock mass, and correcting model parameters; and creating a numerical model of an engineering scale to adjust the parameters to match field deformation characteristics, and finally simulating fracture evolution of the roadway surrounding rock. The present invention provides accurate and basic mechanical parameters for discrete-element numerical simulation of roadway deformation, guaranteeing realistic and reliable simulation results.

Abstract: A nonlinear disturbance rejection control apparatus and method for electronic throttle control systems are invented to control the electronic throttle system and to achieve a continuous finite-time disturbance rejection control goal. A control sub-apparatus and method are proposed with an observing sub-apparatus and method for controlling the opening angle of an electronic throttle valve. A mathematical model of the electronic throttle system is analyzed and a control-oriented model is presented with the formation of a lumped disturbance. With combination of the continuous terminal sliding mode control method and the output feedback control method, based on the finite-time high-order sliding mode observer, the preferred control performance is guaranteed, where both the dynamic and static performance of the system is effectively improved.

Abstract: A method comprising: obtaining a respective measurement of a beacon signal transmitted wirelessly between the mobile device and each of a plurality of the reference nodes; for each of a plurality of different reference locations within the environment, distinct from the reference nodes, obtaining a corresponding measurement of a test signal previously transmitted or modelled to have been transmitted wirelessly between the reference location and each of the plurality of reference nodes; for each of the reference locations, determining for each of said plurality of beacon nodes a difference between the respective measurement of the beacon signal and the measurement of the test signal; for each of the reference locations, determining a value of a measure of statistical spread in these differences; and estimating the location of the mobile device in dependence on a comparison of the values of the measure of statistical spread determined for the different reference locations.

Abstract: Methods and apparatus for assigning a role to a new lighting node in a lighting system based on a received signal strength indicator (“RSSI”) fingerprint of the new lighting node. For example, methods and apparatus described herein are directed to determining RSSI fingerprints for each lighting node in a lighting system, matching one of the RSSI fingerprints to the RSSI fingerprint of a new lighting node, and assigning a role to the new 5 lighting node. The assigned role is the same role as previously assigned to the matching lighting node.

Abstract: An apparatus for protecting a roof tray when a gob-side entry retaining end support migrates is provided. The apparatus is mounted at a top end position of a hydraulic support, and includes a movable bearing mechanism, an automatic expansion/contraction connecting groove mechanism, and an active reset mechanism. The movable bearing mechanism includes two parallel belts and a plurality of rollers supporting the belts, and the rollers are mounted on and supported by a bearing mechanism. The automatic expansion/contraction connecting groove mechanism is two concave base plates fixed between the two belts, and the two concave base plates are spaced by a distance. The active reset mechanism includes two telescopic rods and reset springs sleeved on the telescopic rods, and the telescopic rod is connected to an end portion of the reset spring to form a synchronous mechanism.

Abstract: The invention relates to a system and methods for providing conditional access to indoor location information in a system comprising a mobile device (320), a positioning webservice (310) and an authorization authority (360), the method comprising: the mobile device (320) performing the steps of: transmitting license information to the authorization authority (360) and transmitting a request for indoor location information to the positioning webservice, the request comprising a request-location-estimate corresponding to a location estimate of the mobile device (320) at the time of making the request, the authorization authority (360) performing the steps of: receiving the license information, verifying whether the license information authorizes access to indoor location information by the mobile device (320), issuing a secure proof, verifiable by the positioning webservice (310) upon successful verification, the secure proof indicating that the license information authorizes access to indoor location informati

Abstract: The present invention is related to verifying an installed lighting system (300), in particular an Ethernet-based lighting system (300), without it being necessary to employ a designated lighting controller and without it being necessary to completely commission the installed lighting system (300). According to an aspect of the invention, this is achieved by providing a network switch (200) that comprises a plurality of ports for coupling luminaires (312A, 312B, 312C, 312D) and sensors and/or actuators (314A, 314B) of the lighting system (300) to the network switch (200); and by setting the network switch (200) such that a signal received at a first port (e.g. port 4) of the plurality of ports is only forwarded to pre-selected ports (e.g. ports 2,3,5,6 and 7) of the plurality of ports.

Abstract: A method comprising: obtaining a respective measurement of a beacon signal transmitted wirelessly between the mobile device and each of a plurality of the reference nodes; for each of a plurality of different reference locations within the environment, distinct from the reference nodes, obtaining a corresponding measurement of a test signal previously transmitted or modelled to have been transmitted wirelessly between the reference location and each of the plurality of reference nodes; for each of the reference locations, determining for each of said plurality of beacon nodes a difference between the respective measurement of the beacon signal and the measurement of the test signal; for each of the reference locations, determining a value of a measure of statistical spread in these differences; and estimating the location of the mobile device in dependence on a comparison of the values of the measure of statistical spread determined for the different reference locations.

Abstract: The present invention provides an engineering machinery hydraulic system with compensation differential pressure controllable, uses an electronic pressure compensating valve to solve the problem of flow mismatch under conditions of pressure over-limit and flow saturation, and realizes proportional shunt control and high-precision flow distribution of the system. The engineering machinery hydraulic system disclosed in the present invention has the advantages of low energy consumption, fast response speed, and high flow control precision.

Abstract: The invention relates to a system and methods for providing conditional access to indoor location information in a system comprising a mobile device (320), a positioning webservice (310) and an authorization authority (360), the method comprising: the mobile device (320) performing the steps of: transmitting license information to the authorization authority (360) and transmitting a request for indoor location information to the positioning webservice, the request comprising a request-location-estimate corresponding to a location estimate of the mobile device (320) at the time of making the request, the authorization authority (360) performing the steps of: receiving the license information, verifying whether the license information authorizes access to indoor location information by the mobile device (320), issuing a secure proof, verifiable by the positioning webservice (310) upon successful verification, the secure proof indicating that the license information authorizes access to indoor location informati

Abstract: The present invention relates to a method for operating a communication apparatus in a network comprising a plurality of communication nodes, upon reception of a message at the communication apparatus, the communication apparatus starting a retransmission delay being selected at random from a retransmission delay interval, said retransmission delay interval being dependent on at least one of a status of the communication apparatus and a property of the received message, the communication apparatus monitors retransmissions of said message by other communication nodes during said retransmission delay and the communication apparatus transmitting a retransmission of said message at the expiry of said retransmission delay if a statistic based on the retransmissions of said message by other communication nodes is below a threshold.