Abstract: A downhole system having a chemical injection valve assembly configured to inject at least one chemical from a chemical injection line into a downhole tubing. The chemical injection valve assembly includes a passive access control mechanism configured to reveal a first port to the tubing in a first condition and block the first port in a second condition. The passive access control mechanism including a movable piston, wherein in the first condition the piston is exposed to a first pressure source on a first side of the piston and to a second pressure source on a second side of the piston. The first pressure source is from within the tubing and the second pressure source is from outside of the chemical injection line and the tubing. Also included is a method of chemical injection in a downhole system.

Abstract: The present invention discloses a method of time synchronization and a base station system. The base station system includes a main unit, at least one radio unit, and a transmission medium adapted to transmit information between the main unit and the at least one radio unit. The base station system further includes a clock synchronization server configured dose to the side of the at least one radio unit or integrated with the at least one radio unit. The clock synchronization server is adapted to transmit synchronization data to the main unit through the transmission medium, so that the main unit performs configuration processing according to the synchronization data to implement time synchronization with the clock synchronization server.

Abstract: Technologies are generally described for methods and systems effective to determine traffic volume of a domain name server caused by a host domain. In some examples, a host domain may store page view data that relates to page views requested at the domain name server. The host domain may receive a first query for a resource associated with the host domain. The host domain may add an instruction to the resource to produce a modified resource and send the modified resource to a device. The modified resource may generate a second query that may be used to determine traffic volume. The device may receive the modified resource, and generate the second query that includes an identification of the domain name server. The host domain may receive the second query, detect the identification, and update the page view data. The host domain may determine traffic volume based on the page view data.

Abstract: Improved method and apparatus for signaling of reference pictures used for temporal prediction. The signaling schemes and construction process for different reference picture lists in HEVC Working Draft 5 (WD5) are improved.

Abstract: Embodiments of the present invention provide a cell management device and method. A data transmission delay between a coordinating cell and a serving cell is measured and compared with a requirement of a preset coordination manner for the data transmission delay, coordinating cells are managed by category according to the delay, a coordinating cell that satisfies the requirement of the preset coordination manner for the data transmission delay is identified, and then the coordinating cell that satisfies the delay requirement participates in coordinated communication of the cell with priority. Therefore, normal implementation of a coordinated function can be ensured, and an expected effect of the coordinated communication of the cell can be exerted. The device may be applicable to multiple networking cases and can be set flexibly, easily and conveniently.

Abstract: A shut off system for a hydrocarbon recovery mandrel includes an inline valve assembly that contains a nipple that includes a chemical flow line. The chemical flow line is operative to transfer fluids from outside the wellbore to a mandrel channel; where the mandrel channel is disposed in the mandrel. A valve assembly includes a cylinder and a piston shaft; where the cylinder contacts the chemical flow line; where the piston shaft reciprocates in the cylinder in response to opposing applied pressures. The piston shaft contacts a sealing object that is operative to facilitate or to prevent fluid flow from the chemical flow line to the mandrel channel. The cylinder includes a port that provides fluid communication from the cylinder to the mandrel channel and an actuating assembly; where the actuating assembly is operative to displace the piston shaft in the cylinder to prevent fluid communication between the chemical flow line and the mandrel channel.

Abstract: Systems, methods, and instrumentalities are disclosed relating to modifications to reference picture lists used for multiple layer video coding. A bitstream that may include a reference picture list of a slice may be received. An indication to reposition a reference picture within the reference picture list from a first position to a second position may be received. An indication to insert a reference picture within the reference picture list at a position may be received. The reference picture may be repositioned and/or inserted in the reference picture list in response to receiving the indication. A reference picture previously associated with the position may be shifted in the reference picture list according to the indication to reposition and/or insert the reference picture, although an indication to reposition the reference picture previously associated with the position may not be received. The slice may be decoded using the reference picture list.

Abstract: Systems, methods, and instrumentalities are disclosed for error concealment mode signaling for a video transmission system. A video coding device may receive a video input comprising a plurality of pictures. The video coding device may select a first picture from the plurality of pictures in the video input. The video coding device may evaluate two or more error concealment modes for the first picture. The error concealment modes may comprises two or more of Picture Copy (PC), Temporal Direct (TD), Motion Copy (MC), Base Layer Skip (BLSkip; Motion & Residual upsampling), Reconstructed BL upsampling (RU), E-ILR Mode 1, and/or E-ILR Mode 2. The video coding device may select an error concealment mode from the two or more evaluated error concealment modes for the first picture. The video coding device may signal the selected error concealment mode for the first picture in a video bitstream.

Abstract: A remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling is provided, including a piston speed control system, a motor assembly, a cardan shaft assembly and a transmission shaft assembly which are connected with each other from up to down in sequence. The motor assembly includes air inlets, a cam, air cylinders, pistons, a connecting rod, air outlets, liquid inlets, hydraulic cylinders, liquid check valves, a liquid storage chamber, liquid outlets, a liquid injecting chamber, a liquid injecting hole, an anti-drop cap, a rotor, a stator, and a motor assembly housing. The present invention utilizes the high-pressure gas injected by the gas drilling to drive the pistons to move back and forth at high-speed, so as to drive the incompressible liquid within the driving screw to achieve the self-circulating motion, and the screw rotor is driven to rotate by the liquid.

Abstract: A device may control a video communication via transcoding and/or traffic shaping. The device may include a multipoint control unit (MCU) and/or a server. The device may receive one or more video streams from one or more devices. The device may analyze a received video stream to determine a viewing parameter. The viewing parameter may include a user viewing parameter, a device viewing parameter, and/or a content viewing parameter. The device may modify a video stream based on the viewing parameter. Modifying the video stream may include re-encoding the video stream, adjusting an orientation, removing a video detail, and/or adjusting a bit rate. The device may send the modified video stream to another device. The device may determine a bit rate for the video stream based on the viewing parameter. The device may indicate the bit rate by sending a feedback message and/or by signaling a bandwidth limit.

Abstract: The present invention discloses a method of time synchronization and a base station system. The base station system includes a main unit, at least one radio unit, and a transmission medium adapted to transmit information between the main unit and the at least one radio unit. The base station system further includes a clock synchronization server configured close to the side of the at least one radio unit or integrated with the at least one radio unit. The clock synchronization server is adapted to transmit synchronization data to the main unit through the transmission medium, so that the main unit performs configuration processing according to the synchronization data to implement time synchronization with the clock synchronization server.

Abstract: A video coding device may provide video data processing. The video coding device may receive a plurality of video representation format subsets. The plurality of video representation format subsets may correspond to a plurality of layers. Each of the plurality of video representation subsets may include one or more video representation parameter values. The video coding device may receive a video representation format subset index (e.g., in a cross-layer parameter set) associated with a current layer. The video coding device may determine, using the video representation format subset index, one of the plurality of video representation format subsets associated with the current layer.

Abstract: Methods, systems, and instrumentalities are described to implement single loop decoding, A video decoding device (VDD) may receive a video bitstream, which may include one or more bitstreams (e.g., base layer bitstream, enhanced layer bitstream, etc.) The VDD may generate a hybrid inter-layer reference (H-ILR) picture. The H-ILR picture may be generated based on one or more inputs including, for example, a first layer motion information, a processed (e.g., upsampled) first layer residue signal, a second layer texture information, etc. The first layer motion information may be derived from a compressed first layer motion field or an uncompressed first layer motion field. An H-ILR block of the H-ILR picture may be reconstructed by deriving motion information of the H-ILR block from one or more neighboring H-ILR blocks in the H-ILR picture, for example, when the neighboring blocks are inter-coded.

Abstract: A multistage flow control device includes, a tubular with a plurality of one or more openings, a plurality of seats positioned at the tubular, and a plurality of plugs that are movable relative to the tubular between at least a first position sealingly engaged with one of the plurality of seats and a second position displaced from the one of the plurality of seats. Each of the plurality of plugs is movable from the first position to the second position in response to a pressure differential applied thereacross achieving a threshold value with a first of the plurality of plugs moving at a first threshold value and a second of the plurality of plugs moving at a second threshold value.

Abstract: The present invention discloses a radio base station and a method for clock synchronization of the radio base station. The radio base station may include a base station outdoor apparatus including an adapter, a ground service antenna, and a satellite antenna. A base station indoor apparatus includes a satellite signal processing module configured to perform decoding processing on a satellite radio frequency signal received by the satellite antenna to obtain a satellite service signal. The satellite antenna and the ground service antenna are connected to the adapter. The adapter is configured to couple the signals received by the satellite antenna and ground service antenna, and transmit a coupled signal to the base station indoor apparatus through a first data cable.

Abstract: A solid-phase polymerization method of high-molecular-weight aliphatic polyester conducts the solid-phase polymerization of aliphatic polyester prepolymer under a gas stream containing sulfonic acid catalyst. The method features preparing metal free aliphatic polyester with high molecular weight, good color and luster and perfect thermal stability efficiently. The non-metal-ion aliphatic polyester is not only applicable to common use, but is also suitable as high value-added medical material and packing material which contacts with food directly than other metal-containing polyester.

Abstract: In one aspect, an apparatus for use in a wellbore is disclosed, including: an inlet; an outlet; and a variable flow restriction configured to provide a predetermined constant pressure drop between the inlet and the outlet in response to a range of inlet flow rates. In another aspect, a method for providing a fluid flow within a wellbore is disclosed, including: providing the fluid flow to an inlet; restricting the fluid flow to provide a predetermined constant pressure drop between the inlet and an outlet in response to a range of fluid flow rates; and providing the fluid flow to the wellbore from the outlet.

Abstract: In enhancement layer (EL) coding, the temporal candidate(s) may be derived the merge mode and the non-merge mode. Selection of the reference index of a current prediction unit (PU) and of the reference list of a co-located PU may be considered jointly when constructing the temporal candidate of EL for the merge mode. The selection?) may be made such that a motion vector (MV) scaling operation may be avoided. A selected motion vector prediction candidate may be added to a merging candidate list in a position before that of a spatial motion vector prediction candidate. A selected motion vector prediction candidate may be added to the merging candidate list in place of a spatial motion vector prediction candidate.

Abstract: A system, method, and computer program product are provided for performing object-space shading. A primitive defined by vertices in three-dimensional (3D) space that is specific to an object defined by at least the primitive is received and a shading sample rate is computed for the primitive based on a screen-space derivative of coordinates of a pixel fragment transformed into the 3D space. A shader program is executed by a processing pipeline to compute shaded attributes for the primitive according to the computed shading sample rate.

Abstract: A system, method, and computer program product are provided fir shading using a dynamic object-space grid. An object defined by triangle primitives in a three-dimensional (3D) space that is specific to the object is received and an object-space shading grid is defined for a first triangle primitive of the triangle primitives based on coordinates of the first triangle primitive in the 3D space. A shader program is executed by a processing pipeline to compute a shaded value at a point on the object-space shading grid for the first triangle primitive.