Abstract: A photovoltaic building material, which can safely generate electric power with solar power energy is disclosed. The photovoltaic building material can be used as building material, and can be directly installed on the fixed part of the building, such as roof, wall or decoration materials on the surface of building. The photovoltaic building material is accord with the architectural requirements of waterproof, fireproof, load-carrying ability, durability and heat-insulation. When this invention is installed on the roof, the automatic spraying device can be set up on the height of ridge, which realizes the functions of roof cleaning and cooling down by the automatic water spraying. Also, with the auxiliary device, this invention can intensify the ability to withstand strong winds for roof, and can ensure safety in the typhoon/hurricane area.

Abstract: A method for selecting a grasp posture of a dual-arm robot includes: setting a fitness value range, an iteration quantity threshold, and a fitness function; calculating the fitness value of the population, determining whether the population is within the value range, ending an iteration if the population is within the value range or continuing to determine whether a quantity of iterations reaches the iteration quantity threshold if the population is not within the value range, ending the iteration if the quantity of iterations reaches the iteration quantity threshold or performing crossover and mutation operations if the quantity of iterations does not reach the iteration quantity threshold, and dynamically selecting a gene retention strategy based on an iteration depth and a fitness value to retain a gene; updating a gene population representing a grasping position and performing determining cyclically; and obtaining an optimal target corresponding to dual arms after the iteration.

Abstract: Embodiments of this application provide a battery and an electric apparatus, where the battery includes: a plurality of battery cells; a heat exchange pad, disposed between two adjacent battery cells and configured to exchange heat with the battery cells; and a cooling pipe, configured to deliver cooling fluid, and the cooling pipe is provided with a plurality of outlets. The heat exchange pad is provided with inlets corresponding to the outlets, and the cooling pipe is configured to deliver the cooling fluid to the inlets of the heat exchange pad through the outlets. A flow channel that communicates with the inlets is further provided on the heat exchange pad, and the flow channel is configured to accommodate the cooling fluid to exchange heat between the cooling fluid and the battery cells. The technical solutions of the embodiments of this application can enhance the safety of the battery.

Abstract: Method for forming a metallic component surface to achieve lower electrical contact resistance. The method comprises modifying a surface chemical composition and creating a micro-textured surface structure of the metallic component that includes small peaks and/or pits. The small peaks and pits have a round or irregular cross-sectional shape with a diameter between 10 nm and 10 microns, a height/depth between 10 nm and 10 microns, and a distribution density between 0.4 million/cm2 and 5 billion cm2.

Abstract: The present application provides a conversion system and a control method, including N power converters and N controllers, and N controllers one-to-one corresponds to the N power converters. In addition to receiving a first side current and a second side voltage of a corresponding power converter, each of the N controllers can also receive a neighboring direct current voltage signal which only reflects second side voltages of other M power converters in the conversion system, and perform voltage control on the corresponding power converter according to the received signal. The present application adopts fully distributed control, and does not need to set up a centralized controller. When parts of controllers fail, the other controllers can continue to work, so the reliability is higher.

Abstract: An application of a branched-chain ?-ketoacid dehydrogenase complex in preparation of malonyl coenzyme A. A method for preparing malonyl-CoA using a branched-chain ?-ketoacid dehydrogenase complex, the method comprising introducing a gene encoding a branched-chain ?-ketoacid dehydrogenase complex into a biological cell strain to obtain a recombinant cell strain capable of expressing the gene encoding the branched-chain ?-ketoacid dehydrogenase complex; culturing the recombinant cell strain to prepare malonyl-CoA; the branched-chain ?-ketoacid dehydrogenase complex is the following M1) or M2): M1) a set of proteins consisting of a bkdF protein, a bkdG protein, a bkdH protein and a lpdA1 protein; M2) a set of proteins consisting of a bkdA protein, a bkdB protein, a bkdC protein and the lpdA1 protein.

Abstract: The present application provides a conversion system and a control method, including N power converters and N controllers, where each power converter includes a first side and a second side, the first sides of the N power converters are electrically coupled in series, and currents flowing through the first sides of the N power converters are the same, the N controllers correspond to the N power converters one to one. Each controller contains a common-mode voltage loop and a current loop. The common-mode voltage loop is configured to receive a voltage reference signal and a voltage feedback signal, and output a given signal. The current loop is configured to receive the given signal, a current reference signal, and a first side current of a corresponding power converter, and output a common-mode control signal to modulate a first side voltage of the corresponding power converter.

Abstract: A target object identification system includes a first camera, a second camera, and a processor. The first camera acquires an image of a first target region. The second camera synchronously acquires an image of a second target region. The second target region includes part or all of the first target region. Resolution of the first camera is higher than that of the second camera, and field of view of the second camera is greater than that of the first camera. The processor identifies first target objects according to the image of the first target region, and second target objects according to the image of the second target region, and determines association relationships between the first target objects in the image of the first target region and the second target object in the synchronously acquired image of the second target region.

Abstract: Disclosed are three-phase system and distributed control method. The three-phase system comprises three-phase circuits, of which each phase circuit including at least one power conversion cell; and at least three phase controllers for controlling each phase circuit, respectively, each phase controller including a communication interface through which the at least three phase controllers are in communications connection with each other; wherein the phase controllers of each phase circuit is configured for regulating bridge arm voltages of the at least one power conversion cell in the phase circuit by receiving signals sent from the phase controllers of other two phase circuits through the communication interface. The three-phase system and the distributed control method of the invention solve problems of balance of three-phase current and stabilization of three-phase DC voltages by coordination among the three phases.

Abstract: Example MOSFET circuits include a first metal-oxide-semiconductor field-effect transistor (MOSFET) having a gate, a source and a drain, and a second MOSFET coupled in series with the first MOSFET. The second MOSFET has a gate, a source and a drain. The MOSFET circuit also includes a controller configured to supply a same control signal to the gate of the first MOSFET and the gate of the second MOSFET to turn on or turn off the first MOSFET and the second MOSFET when a drain-source voltage of the first MOSFET and a drain-source voltage of the second MOSFET are substantially zero. Other MOSFET circuits and methods of operating MOSFET circuits are also disclosed.

Abstract: The present application provides a conversion system and a control method, including N power converters and N controllers, and N controllers one-to-one corresponds to the N power converters. In addition to receiving a first side current and a second side voltage of a corresponding power converter, each of the N controllers can also receive a neighboring direct current voltage signal which only reflects second side voltages of other M power converters in the conversion system, and perform voltage control on the corresponding power converter according to the received signal. The present application adopts fully distributed control, and does not need to set up a centralized controller. When parts of controllers fail, the other controllers can continue to work, so the reliability is higher.

Abstract: The present application provides a conversion system and a control method, including N power converters and N controllers, where each power converter includes a first side and a second side, the first sides of the N power converters are electrically coupled in series, and currents flowing through the first sides of the N power converters are the same, the N controllers correspond to the N power converters one to one. Each controller contains a common-mode voltage loop and a current loop. The common-mode voltage loop is configured to receive a voltage reference signal and a voltage feedback signal, and output a given signal. The current loop is configured to receive the given signal, a current reference signal, and a first side current of a corresponding power converter, and output a common-mode control signal to modulate a first side voltage of the corresponding power converter.

Abstract: The present application provides a power converter and a power supply system, the power converter includes: a star/delta switching unit, a first power conversion unit, a second power conversion unit, a third power conversion unit, and a controller; AC terminals of the first power conversion unit, the second power conversion unit and the third power conversion unit are connected to a three-phase AC terminal through the star/delta switching unit, and DC terminals of the first power conversion unit, the second power conversion unit, and the third power conversion unit are connected to a DC power terminal; wherein the controller is configured to control the star/delta switching unit according to a signal reflecting a voltage of the DC power terminal, to form a star connection or a delta connection among the three-phase AC terminal and the first power conversion unit, the second power conversion unit and the third power conversion unit.

Abstract: Disclosed are three-phase system and distributed control method. The three-phase system comprises three-phase circuits, of which each phase circuit including at least one power conversion cell; and at least three phase controllers for controlling each phase circuit, respectively, each phase controller including a communication interface through which the at least three phase controllers are in communications connection with each other; wherein the phase controllers of each phase circuit is configured for regulating bridge arm voltages of the at least one power conversion cell in the phase circuit by receiving signals sent from the phase controllers of other two phase circuits through the communication interface. The three-phase system and the distributed control method of the invention solve problems of balance of three-phase current and stabilization of three-phase DC voltages by coordination among the three phases.

Abstract: The present invention discloses a novel p-toluenesulfonic acid salt and a crystalline polymorphic Form 1 of said salt of 1-((2S,5R)-5-((7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino)-2-methylpiperidin-1-yl)prop-2-en-1-one, pharmaceutical composition containing the same, as well as preparations and uses thereof. The present invention also discloses a novel phosphoric acid salt of 1-((2S,5R)-5-((7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino)-2-methylpiperidin-1-yl)prop-2-en-1-one, pharmaceutical composition containing the same, as well as preparations and uses thereof.

Abstract: Provided is a method for construction of recombinant bacteria for producing 3-hydroxypropionic acid. The method includes: knocking out fadR, fabF and fabH genes of recipient bacteria, introducing acc genes or gene clusters, alKL and Mcr genes, and enhancing the expression of fadL, fadD, sthA genes and atoSC gene clusters in the recipient bacteria. Also provided is a method for producing 3-hydroxypropionic acid by using the recombinant bacteria.

Abstract: The present disclosure provides a target object identification system including a first image acquisition apparatus, a second image acquisition apparatus, and a processor. The first image acquisition apparatus may acquire an image of a first target region. The second image acquisition apparatus may synchronously acquire an image of a second target region. The second target region includes part or all of the first target region. The resolution of the first image acquisition apparatus is higher than that of the second image acquisition apparatus, and the field of view of the second image acquisition apparatus is greater than that of the first image acquisition apparatus.

Abstract: An optical positioning code disk, device and method for a microfluidic chip are provided. A cross section of an outer contour of the code disk is circular. N light transmissive openings are arranged uniformly around the code disk. The device includes: the code disk, a positioning pin, a rotating shaft, a motor, an internal photoelectric switch and an external photoelectric switch. A positioning surface is provided on the rotating shaft. The motor is fixedly connected with an end of the rotating shaft, and the other end of the rotating shaft passes through a center of the cross section of the code disk. The internal and external photoelectric switches are configured to identify the light transmissive openings on the code disk.

Abstract: A method for continuously collecting fluorescence data of a microfluidic chip is provided. In the method, an optical path system emits a light perpendicular to the microfluidic chip, such that a center of a light spot formed by the optical path system on the microfluidic chip is located on a circle formed by centers of all reaction cells. The microfluidic chip is rotated around a center of the circle formed by centers of all the reaction cells. Fluorescence signal values are collected by using the optical path system along a rotation direction of the microfluidic chip. The collected fluorescence signal values are processed to obtain effective fluorescence data of all the reaction cells.

Abstract: Method for forming a metallic component surface to achieve lower electrical contact resistance. The method comprises modifying a surface chemical composition and creating a micro-textured surface structure of the metallic component that includes small peaks and/or pits. The small peaks and pits have a round or irregular cross-sectional shape with a diameter between 10 nm and 10 microns, a height/depth between 10 nm and 10 microns, and a distribution density between 0.4 million/cm2 and 5 billion cm2.