Abstract: A method and apparatus for forming vascular-like channels involves liquid-in-liquid 3D printing utilizing two polymer solutions used as a printing ink and a matrix. Anionic polyacrylamide (APAM) is one of the polymer solutions and acts as the matrix material. Chitosan is the other polymer solution and acts as the printing ink. The chitosan printing ink is extruded through a print nozzle of a 3D printer onto the APAM matrix which covers the bottom of a petri dish while the nozzle is moved in a desired pattern for the channels. The chitosan and APAM polymer complexes self-assemble on the ink-matrix interface, locking chitosan polymers inside the matrix before they can spread and causing the formation of soft elastic membranous walls. The chitosan ink and APAM matrix can be removed after the polymer complex self-assembly. The printed chamber with membranous walls allows for liquid infusion to work as fluidic channels.

Abstract: An example foldable mobile computing device includes a first side including a first power storage device coupled to a first regulator. The device includes a second side including a second power storage device coupled to a second regulator and connected in parallel with the first power storage device. The second side is configured to articulate relative to the first side about a hinge. The device includes processing circuitry configured to determine a power storage capacity of the first power storage device and to determine a power storage capacity of the second power storage device. The device is also configured to adjust, based on the power storage capacity of the first power storage device and the power storage capacity of the second power storage device, at least one of an impedance of the first regulator or an impedance of the second regulator.

Abstract: The present disclosure relates to a lithium-replenishing material, a preparation method thereof, and a lithium-ion battery. The lithium-replenishing material comprises metal lithium particles and conductive material, and the conductive material includes a built-in segment embedded in metal lithium particles and an exposed segment external to metal lithium particles; the electrical conductivity of the conductive material is greater than 100 s/cm.

Abstract: As a wellbore is extended into a formation, hydrostatic and hydrodynamic pressures change due to variations in drilling mud weight, fluid density, etc. Strain gauges downhole measure forces experienced by drilling equipment. During drilling, a strain gauge measures strain applied between the drill string and the formation. When off bottom, the strain gauge measures forces experienced by the drill string other than drilling forces. A pressure calculator converts off bottom strain gauge measurements into measurements of hydrostatic pressure for periods without fluid flow (i.e., when drilling motors are paused) and into measurements of hydrodynamic pressure for periods with fluid flow (i.e., when mud motors are operating). The pressure calculator correlates strain measurements (usually in voltages) to pressure based on a predetermined relationship for a given wellbore geometry (e.g., hole diameter, drill bit diameter, drill pipe diameter, etc.).

Abstract: A power supply device includes a first and a second battery cell. A ratio of first parameters of the first battery cell to the second battery cell is greater than a first threshold. A ratio of second parameters of the second battery cell to the first battery cell is greater than a second threshold. When a capacity of the first battery cell is greater than that of the second battery cell, the first battery cell and/or the second battery cell are/is discharged according to a rule including a first, a second, and a third condition. When the first condition is satisfied, the first battery cell is discharged to a load. When the second condition is satisfied, the first battery cell and the second battery cell are discharged to the load. When the third condition is satisfied, the first battery cell is discharged to the second battery cell and the load.

Abstract: Disclosed herein are a composite cathode material for a lithium-ion battery, a lithium-ion battery, and a vehicle. A core of the cathode material is a lithium-nickel-cobalt-manganese oxide material. A surface layer of the cathode material is a lithium-nickel-cobalt oxide material doped with an element E. There is a transition layer between the core and the surface layer. The transition layer is a lithium-nickel-cobalt-manganese oxide material doped with the element E. A content of the element E in the transition layer shows a decreasing trend in a direction from the surface layer of the cathode material to the core. A general formula for the composition of the transition layer is Li1+mNi1-x-y-zCoxMnyEzO2. 0?m?0.1, 0.01?x?0.1, 0.01?y?0.1, and 0.01?z?0.1. E is at least one of Al, Zr, Ti, Y, Ba or Sr.

Abstract: A method includes generating, by at least one hardware processor, a query plan of a query. The query includes a JOIN operation between first time series data and second time series data. At least one node in the query plan corresponding to the JOIN operation is modified to generate a modified query plan. The modifying is based on replacing the at least one node with a new node including a UNION operation. The UNION operation is based on the first time series data and the second time series data. Execution of the query is scheduled based on the modified query plan.

Abstract: A negative electrode sheet, a secondary battery, and an electrical device are provided. The negative electrode sheet includes a negative current collector and a negative electrode active material layer. The negative electrode active material layer is disposed on a surface of the negative current collector. The negative electrode active material layer includes a negative electrode active material and an additive having compression and rebound properties. After a pressure X is applied in a thickness direction of the negative electrode sheet, a rebound rate of the negative electrode sheet is 2%-40%, and a compression rate of the negative electrode sheet is 2%-40%. The pressure X satisfies the following: 0.3 Mpa?X?5 Mpa.

Abstract: A method comprising: disposing a bottom hole assembly (BHA) comprising a Rotary Steerable System (RSS) into a borehole, obtaining bending of the drill bit (BOB) data with a measurement assembly disposed on the BHA, classifying the BOB data into a neutral RSS configuration or a geostationary RSS configuration, determining t1 based at least on a neutral RSS configuration, wherein t1 is the total time during a neutral RSS configuration, determining t2 based at least on a neutral RSS configuration, wherein t2 is the total time during a geostationary RSS configuration, and determining a real time Duty Cycle based at least on t1 and t2. Additionally, a bottom hole assembly (BHA) comprising a Rotary Steerable System (RSS) disposed into a borehole, and a steering control system a configured to perform the method described above.

Abstract: A power battery comprises a first battery cell group and a second battery cell group that are not equal in electromotive force and connected in series. The heating system comprises an inverter, an alternating-current motor, and a first controller. Midpoints of three bridge arms of the inverter are connected to head ends of three-phase coils of the motor in a one-to-one correspondence manner, and tail ends of the motor are connected together to form a neutral point. The neutral point is connected to a first connection point by means of a connection line, and the first connection point is a connection point between the first and second battery cell groups. The first controller is used for inputting a driving signal to the inverter. The first battery cell group, the second battery cell group, the inverter, the motor, and the connection line form an alternating-current self-heating loop.

Abstract: A power battery comprises a first cell group and a second cell group connected in series. The heating system comprises an inverter, an AC motor, a first controller, and a plurality of connection lines. The midpoints of three bridge arms of the inverter are connected to the head ends of three-phase coils of the AC motor in a one-to-one correspondence. The tail ends of the AC motor are connected together to form a neutral point. First ends of the connection lines are connected to the neutral point of the AC motor. Second ends of the connection lines are connected to a connection point between the first cell group and the second cell group. The first controller is configured to input a drive signal to the inverter. The first cell group, the second cell group, the inverter, the AC motor, and the connection lines form an AC self-heating loop.

Abstract: A heating system for heating a battery, includes an inverter including three bridge arms, an alternating current motor, a first controller, and a connection line. A positive electrode of the battery connects to upper bridge arms of the inverter. A negative electrode of the battery connects to lower bridge arms of the inverter. Midpoints of the three bridge arms connects to head ends of three coils of the alternating current motor respectively. Tail ends of the three coils connects together as a neutral point. A first end of the connection line connects to the neutral point, and a second end of the connection line connects to the battery. The first controller inputs a drive signal to the inverter. The battery, the inverter, the alternating current motor, and the connection line form an alternating current self-heating loop. A heating device connects to the connection line, and heats the battery.

Abstract: A shake correction control device includes a processor that selects mechanical correction of mechanically performing shake correction of a subject image or electronic correction of electronically performing the shake correction of the subject image. The processor performs a switching control from either of the mechanical correction or the electronic correction to the other of the mechanical correction or the electronic correction, and synchronizes shake correction operations of the mechanical correction and the electronic correction during the switching control, and changes an operation ratio of the mechanical correction and the electrical correction during the switching control.

Abstract: A heating circuit of a power battery is provided. The power battery includes a first battery core group and a second battery core group connected in series. The heating circuit includes an inverter, an alternating current motor, and a first controller. A neutral point of the alternating current motor is connected to a first connection point between the first battery core group and the second battery core group. The first controller is configured to input a driving signal to control the inverter to alternately connect the first battery core group to the alternating current motor and the second battery core group to the alternating current motor, to cause the first battery core group and the second battery core group to charge each other.

Abstract: In some embodiments, a computer-implemented method for constructing a taxonomy graph using a machine learning framework comprises preparing target data comprising target entity pairs, target entity features, and target context features, each target entity pair comprising a first target entity and a second target entity, the target context feature comprising a target sentence embedding of a target sentence that includes the first target entity and the second target entity, the preparing of the target data comprising: for each target entity pair, including the target entity pair in the target data based on a determination that the first target entity and the second target entity of the target entity pair are present in the target sentence; and generating a target taxonomy graph using a trained classification model, the target taxonomy graph comprising a hierarchical structure, the generating the target taxonomy graph comprising inputting the target data into the trained classification model.

Abstract: A shake correction control device includes a processor that selects mechanical correction of mechanically performing shake correction of a subject image or electronic correction of electronically performing the shake correction of the subject image. The processor performs a switching control from either of the mechanical correction or the electronic correction to the other of the mechanical correction or the electronic correction, and synchronizes shake correction operations of the mechanical correction and the electronic correction during the switching control, and changes an operation ratio of the mechanical correction and the electrical correction during the switching control.

Abstract: A method is provided to process a hierarchical query request for requesting to query a target database table, where the hierarchical query request includes a query start condition and a connection condition. The method includes: in a first query round, first data is queried from the target database table based on the query start condition, and the first data is used as a root node of a tree structure; a plurality of pieces of service data in the target database table are grouped into N data groups corresponding to N worker threads based on the connection condition, where N is an integer greater than 1; and in an ith query round greater than 1, a leaf node in the current tree structure is selected as a parent node; and a target worker thread corresponding to the parent node is determined from the N worker threads based on the connection condition.

Abstract: Embodiments of this specification provide a table data query method, a table data query apparatus, and a system that are of a distributed database. In response to that a table data processing node executes a first execution subplan to read row data of a driving table, the table data query apparatus generates a data rescanning instruction or a data scanning instruction based on whether a cache apparatus of the table data processing node caches the read row data, and sends the data rescanning instruction or the data scanning instruction to a driven table scanning scheduling apparatus of the table data processing node. The driven table scanning scheduling apparatus obtains a driven table data query result based on the data rescanning instruction or the data scanning instruction, and returns the driven table data query result to the table data query apparatus.

Abstract: The present invention provides an isolated gene and promoter for regulating the branch numbers of soybean, so as to regulate the branch numbers of soybean, thereby improving the yield of soybean. The present invention will have a great theoretical and practical value in soybean high-yield breeding and related application research.

Abstract: The present disclosure provides an earth-boring drill bit including a bit head and a shank. The shank includes a blank and a mandrel. The mandrel is concurrently formed by and secured to the blank by additive manufacturing. The mandrel includes a first region including a first alloy and a second region including a second alloy. The first alloy and the second alloy have a different modulus of elasticity, yield strength, resilience, ductility, hardness, fracture toughness, wear resistance, corrosion resistance, or erosion resistance. The disclosure also provides a mandrel wherein the second region comprises a sensor region or a fluid passageway having a geometry that is not obtainable in a mandrel that is cast, machined, or both. The disclosure additionally provides method of manufacturing such bits and mandrels.