Abstract: A system (200) for pumping a multi-phase feed mixture includes a separation section (230) having a separation tank (206), a mixing section (240), and a pumping section (250). The separation tank (206) has a feed mixture entrance (204) and a liquid outlet (215) located at different axial positions along a wall of the separation tank (206). A gas line (212) extends through the separation tank (206) from a gas inlet (217) located in an interior of the separation tank to a gas outlet (218) located outside of the separation tank (206). The mixing section (240) includes a fluid suction chamber (220) surrounding the gas outlet (218), and a liquid line (216) fluidly connects the liquid outlet (215) to the fluid suction chamber (220). The pumping section (250) includes a pump (226), and a diffuser (222) fluidly connects the fluid suction chamber (220) to a pump inlet (224).

Abstract: An electric submersible pump system for use in a wellbore includes a pump; a motor protection component having an oil chamber and an wellbore fluid chamber; a motor component, the motor component including oil and being fluidly coupled to the oil chamber of the motor protection component; and a chemical chamber that includes a neutralization chemical. The neutralization chemical includes a scale inhibitor. The chemical chamber is configured to contact fluid from the wellbore with the neutralization chemical and is fluidly coupled to the wellbore fluid chamber of the motor protection component. The pump is configured to be driven by the motor component. A chemical chamber and a method for operating an electric submersible pump are also disclosed.

Abstract: A method of isolating or suppressing forced oscillations in a power grid by utilising a wind turbine system comprising a wind turbine for capturing wind power, a generator driven by the wind turbine, and a power converter configured to control the rotational speed of the generator for controlling a supply of active power to the power grid. The power converter is further configured to supply reactive power to the power grid independently from the supply of active power. The method comprising the steps of: obtaining measurements of a forced oscillation occurring within the power grid; controlling the converter to supply active and reactive corrective oscillating power to the power grid in response to the measured forced oscillation such that the corrective oscillating power suppresses the forced oscillations.

Abstract: The present invention relates to a preparation method of a P-type high-resistance and ultra-high-resistance Czochralski monocrystalline silicon substrate. According to the present invention, an oxygen concentration in a silicon wafer is controlled to match with a resistivity, so as to realize that a conductive type of the silicon substrate does not change after a device is manufactured, and that the silicon substrate has a high resistivity. The oxygen concentration and the resistivity in silicon crystal can be adjusted separately or together; and operation is flexible, and a yield of a high-resistance silicon crystal is greatly improved.

Abstract: The disclosure provides a method for data instance processing. The method includes obtaining a set of data instances collected from a plurality of organizations. Each of the data instances includes at least one record formed in an organization that stores values of a plurality of attributes of the data instance. The method also includes dividing the set of data instances into groups, wherein data instances with conflicting values for the same attribute are divided into different groups. The method further includes subdividing data instances in each of the groups into clusters.

Abstract: The present disclosure relates to a method for improving the surface roughness of a SOI wafer. By controlling the gas composition at each stage of the rapid thermal treatment process and corresponding heating and annealing processes, the final wafer is enabled to have a surface roughness of less than 5? and has good application prospects.

Abstract: The present disclosure relates to a method for treating a wafer surface. By controlling the gas composition at each stage of the treatment process, and corresponding processes of heating and annealing, and cooling and thinning by oxidation, the final wafer is enabled to have a surface roughness of less than 5 ?. This effectively reduces the cost of the final treatment process and has good application prospects.

Abstract: A method for controlling a wind turbine system connected to a power grid. The method comprises generating a wind turbine control signal based on a power control reference for controlling a power output of a wind turbine; monitoring an electrical frequency of the power grid; in response to detecting a change in the frequency in the power grid, activating a fast frequency support method comprising the steps of; adjusting the power control reference to cause an overproduction of power by the wind turbine; the overproduction of power causing a transfer of inertial kinetic energy from the wind turbine to electrical power; wherein the power control reference is determined by applying an adaptive gain function to a measurement of a difference in grid frequency from a nominal level.

Abstract: The invention relates to a block bidding method and system for promoting clean energy consumption based on the power trading platform. The block bidding method includes the following steps: dividing the time slots for clean energy units to participate in power trading; predicting the typical monthly power generation curve of clean energy units; decomposing the signed annual power contract of clean energy units into months; determining the monthly trading declaration curve of clean energy units; determining the monthly trading declaration curve of clean energy units; determining the time-slot declaration price of clean energy units; realizing the trading clearing by the power trading platform in accordance with the principle of “high-low matching”.

Abstract: The disclosure relates to a line commutated converter, LCC, for a high-voltage direct current, HVDC, power converter. The LCC comprises at least one bridge circuit for connection to at least one terminal of a DC system. Each bridge circuit comprises at least two arms, and each arm is associated with a phase of an AC system. Each arm comprises one or more upper thyristor valves and one or more lower thyristor valves connected in series, and a branch extending from between the upper and lower thyristor valves. Each arm further comprises a parallel capacitor module comprising at least one parallel capacitor being connected in parallel between at least one pair of branches comprising a first branch and a second branch wherein during commutation of a flow of current in the first branch to a flow of current in the second branch, the at least one parallel capacitor is configured to discharge current in to the second branch in the same direction as the flow of current in the second branch.

Abstract: A printed circuit board includes a first, second, and third conductive layer. The printed circuit boards also includes a first non-conductive layer between the first and second conductive layers and a second non-conductive layer between the second and third conductive layers. The printed circuit board further includes a dielectric layer between the second conductive layer and the second non-conductive layer and a coin for heat dispersion located underneath the dielectric layer. The printed circuit board also includes a cavity for receiving a component and a plating within the cavity to connect the coin with the second conductive layer. The plating extends less than 50 um above the second conductive layer.

Abstract: An electrical submersible pump (ESP) for use in a high viscosity pumping system includes a pump shaft, at least one rotating impeller including an impeller hub and one or more impeller vanes projecting from the impeller hub. Each of the one or more impeller vanes includes an impeller vane edge, and at least one stationary diffuser positioned below the at least one rotating impeller. A diffuser includes a diffuser hub and a diffuser shroud including a diffuser shroud surface. The impeller vane edge and the diffuser shroud surface are separated only by a clearance gap.

Abstract: A line commutated converter (LCC) for a high voltage direct current power converter, the LCC comprising at least one LCC bridge circuit for connection to at least one terminal of a DC system, each bridge circuit comprising a plurality of arms, each associated with a respective phase of an AC system, each arm comprising: an upper thyristor valve or valves, and lower thyristor valve or valves connected in series; an associated branch extending from between the upper and lower thyristors; and at least one thyristor-based capacitor module for each phase, each module comprising a plurality of module thyristors, the or each capacitor module operable to insert a main capacitor into the respective arm of the bridge circuit by firing at least one or more of said module thyristors.

Abstract: An electrical submersible pump (ESP) for use in a high viscosity pumping system includes a pump shaft, at least one rotating impeller including an impeller hub and one or more impeller vanes projecting from the impeller hub, each of the one or more impeller vanes including an impeller vane edge, and at least one stationary diffuser positioned below the at least one rotating impeller, the diffuser including a diffuser hub and a diffuser shroud including a diffuser shroud surface, where the impeller vane edge and the diffuser shroud surface are separated only by a clearance gap.

Abstract: The disclosure relates to a line commutated converter, LCC, for a high-voltage direct current, HVDC, power converter. The LCC comprises at least one bridge circuit for connection to at least one terminal of a DC system. Each bridge circuit comprises at least two arms, and each arm is associated with a phase of an AC system. Each arm comprises one or more upper thyristor valves and one or more lower thyristor valves connected in series, and a branch extending from between the upper and lower thyristor valves. Each arm further comprises a parallel capacitor module comprising at least one parallel capacitor being connected in parallel between at least one pair of branches comprising a first branch and a second branch wherein during commutation of a flow of current in the first branch to a flow of current in the second branch, the at least one parallel capacitor is configured to discharge current in to the second branch in the same direction as the flow of current in the second branch.

Abstract: An armrest assembly includes an armrest and a lid mounted on the armrest for relative rotational movement between a closed and open positions. The lid includes a handle cradle with handle guides on opposed sides and an intermediate inner guide. A handle is located in the handle cradle for relative movement between a latch position and a release position. The handle includes a latch. The latch retains the lid in the closed position when the handle is in the latch position. The handle includes a clip that engages a slot on the lid to retain the handle in the handle cradle. The handle also includes guide channels on opposed sides. The guide channels engage the handle guides. The handle includes an intermediate inner guide space. The inner guide space engages the inner guide. The armrest assembly also includes a spring that biases the handle into the latch position.

Abstract: The disclosure provides a method for data instance processing. The method includes obtaining a set of data instances collected from a plurality of organizations. Each of the data instances includes at least one record formed in an organization that stores values of a plurality of attributes of the data instance. The method also includes dividing the set of data instances into groups, wherein data instances with conflicting values for the same attribute are divided into different groups. The method further includes subdividing data instances in each of the groups into clusters.

Abstract: A line commutated converter (LCC) for a high voltage direct current power converter, the LCC comprising at least one LCC bridge circuit for connection to at least one terminal of a DC system, each bridge circuit comprising a plurality of arms, each associated with a respective phase of an AC system, each arm comprising: an upper thyristor valve or valves, and lower thyristor valve or valves connected in series; an associated branch extending from between the upper and lower thyristors; and at least one thyristor-based capacitor module for each phase, each module comprising a plurality of module thyristors, the or each capacitor module operable to insert a main capacitor into the respective arm of the bridge circuit by firing at least one or more of said module thyristors.

Abstract: An electrical submersible pump for use in an electrical submersible pumping (ESP) system includes one or more pump stages, a thrust chamber having a thrust bearing for countering a thrust force generated by the one or more pump stages, and a unitary housing which encloses the pump stages and the thrust chamber so that the thrust mechanism and the pump stages are housed together.

Abstract: An armrest assembly includes an armrest and a lid mounted on the armrest for relative rotational movement between a closed and open positions. The lid includes a handle cradle with handle guides on opposed sides and an intermediate inner guide. A handle is located in the handle cradle for relative movement between a latch position and a release position. The handle includes a latch. The latch retains the lid in the closed position when the handle is in the latch position. The handle includes a clip that engages a slot on the lid to retain the handle in the handle cradle. The handle also includes guide channels on opposed sides. The guide channels engage the handle guides. The handle includes an intermediate inner guide space. The inner guide space engages the inner guide. The armrest assembly also includes a spring that biases the handle into the latch position.