Abstract: A zero calibration method includes: adding, based on a first forward kinematics model of a robotic arm of a robot, zero deviations of each joint to form a second forward kinematics model, and simultaneously solving the second forward kinematics model and the first forward kinematics model to obtain an end deviation function; sending target end pose instructions to the robotic arm in a current zero point situation, and acquiring a spatial deviation of an actual position of an end; inputting position information of each joint angle and the spatial deviation, after each stop of motion of the end, into the end deviation function, and performing phase shifting to obtain an objective optimization function; and solving the objective optimization function to obtain a zero deviation value.

Abstract: Provided are a recombinant adeno-associated virus (rAAV) genome and a single-polarity rAAV (spAAV) vector formed by packaging same. Specifically, provided is an spAAV genome before packaging, two ends of which are both linear open terminuses, wherein one end does not have an inverted terminal repeat (ITR) or a part thereof, and the other end has a truncated ITR (ITRT), and the ITRT does not form a T-shaped hairpin palindromic structure. The spAAV genome is a single-polarity single-stranded DNA. Also provided are an spAAV vector, a method for delivering an exogenous nucleic acid to a cell by using the vector, and a use of the vector in the preparation of a product for gene expression, gene therapy, gene editing or gene regulation.

Abstract: A ventilation structure of a core chamber of a turbofan engine having a large bypass ratio, said structure comprising: an outer bypass wall surface (1), a core chamber wall surface (4) and a core casing (7). An outer bypass flow channel (2) is formed between the outer bypass wall surface (1) and the core chamber wall surface (4). A core chamber (6) is formed between the core chamber wall surface (4) and the core casing (7). An air intake annular cavity (3) is provided in the core casing and is located at the upstream position. The air intake annular cavity (3) is used to put the outer bypass flow channel (2) and the core chamber (6) in communication. An exhaust grille (5) is further provided on the core chamber wall surface (4) and is located at a tail position.

Abstract: A ventilation structure of a core chamber of a turbofan engine having a large bypass ratio, said structure comprising: an outer bypass wall surface (1), a core chamber wall surface (4) and a core casing (7). An outer bypass flow channel (2) is formed between the outer bypass wall surface (1) and the core chamber wall surface (4). A core chamber (6) is formed between the core chamber wall surface (4) and the core casing (7). An air intake annular cavity (3) is provided in the core casing and is located at the upstream position. The air intake annular cavity (3) is used to put the outer bypass flow channel (2) and the core chamber (6) in communication. An exhaust grille (5) is further provided on the core chamber wall surface (4) and is located at a tail position.

Abstract: A Tylorrhynchus-rice symbiotic comprehensive planting and breeding method mainly based on tylorrhynchus proliferation is provided. The planting method includes: paddy field selection; field layout, wherein an inlet pipe and a drainage pipe controlled by an inlet control assembly and a drainage control assembly, respectively, are provided in the paddy field, and said inlet pipe is provided with an intercepting net for intercepting pest predators; soil preparation and fertilization; stocking of Tylorrhynchuss and seedlings; management of Tylorrhynchus proliferation; rice planting; field management; water level control; rice harvesting; Tylorrhynchus capturing. A comprehensive breeding mode of symbiosis between Tylorrhynchuss and rice is provided.

Abstract: The present disclosure discloses an insect-rice symbiotic comprehensive planting and breeding method mainly based on tylorrhynchus proliferation. The planting method comprises: paddy field selection; field layout; soil preparation and fertilization; stocking of Tylorrhynchuss and seedlings; management of Tylorrhynchus proliferation; rice planting; field management; water level control; rice harvesting; Tylorrhynchus capturing. The present disclosure employs a comprehensive breeding mode of symbiosis between Tylorrhynchuss and rice. By first proliferating the Tylorrhynchuss in the rice field and then planting rice, it can simulate the growth environment of the Tylorrhynchuss in the field to the greatest extent, and give full play to the mutually beneficial symbiotic relationship between Tylorrhynchuss and rice, the rotten g rice roots, stems and leaves can provide food for the Tylorrhynchuss.

Abstract: A device including a golf ball that is configured to be operable for practicing golf swings, a golf ball block pad assembly that is configured to block the golf ball during said golf swing practice, a golf ball pivot arm, a linkage bar that is configured to engage the golf ball block pad assembly to the golf ball pivot arm, and a golf ball hitting pad.

Abstract: A dual fastener manipulation device may be used to manipulate two fasteners, having the same rotational axis, which may be separated by various distances and various sized objects. The dual fastener manipulation device may include a first wrench having a first fastener engaging head, a first handle, and a pivot stud. A second wrench element may have a second fastener engaging head and a second handle. A pivot linkage may be pivotally coupled to the pivot stud, and a floating stud may be coupled to both the second wrench and to the pivot linkage. The first and second fastener engaging heads may be engaged to two fasteners having the same rotational axis, while the pivot linkage and floating stud may maintain the rotational axis of the fastener engaging heads, while also allowing the fastener engaging heads to be moved closer to or farther from each other.

Abstract: A dual fastener manipulation device may be used to manipulate two fasteners, having the same rotational axis, which may be separated by various distances and various sized objects. The dual fastener manipulation device may include a first wrench having a first fastener engaging head, a first handle, and a pivot stud. A second wrench element may have a second fastener engaging head and a second handle. A pivot linkage may be pivotally coupled to the pivot stud, and a floating stud may be coupled to both the second wrench and to the pivot linkage. The first and second fastener engaging heads may be engaged to two fasteners having the same rotational axis, while the pivot linkage and floating stud may maintain the rotational axis of the fastener engaging heads, while also allowing the fastener engaging heads to be moved closer to or farther from each other.

Abstract: A tool coupler for use in coupling a tool to a machine may have a frame with a first end receivable within the tool and a second end located opposite the first end. The tool coupler may also have a hydraulic cylinder pinned to the second end of the frame, and a wedge member pivotally connected to the hydraulic cylinder and configured to pass through the second end of the frame and selectively engage the tool. Engagement of the wedge member with the tool may inhibit disconnect of the first end of the frame from the tool.

Abstract: A tool coupler is disclosed for use in coupling a tool to a machine. The tool coupler may have a frame with a first end receivable within the tool and a second end located opposite the first end. The tool coupler may also have a hydraulic cylinder pinned to the second end of the frame, and a wedge member pivotally connected to the hydraulic cylinder and configured to pass through the second end of the frame and selectively engage the tool. Engagement of the wedge member with the tool may inhibit disconnect of the first end of the frame from the tool.

Abstract: A lift arm cross member may connect a tilt lever support to a pair of lift arms. The lift arm cross member may have a top plate with a generally convex outer surface as the outer surface extends from a first end edge to a second end edge, and a bottom plate having first and second end edges, a first planar portion extending from the second end edge, and a curved portion extending from the first planar portion opposite the second end edge. The first end edge of the bottom plate may be connected to an inner surface of the top plate and the second end edge of the first plate may be connected to an inner surface of the bottom plate. A buffer plate may be provided within the lift arm cross member and extend between the inner surfaces of the top and bottom plates.

Abstract: A support structure for a tilt cylinder of a machine that controls movement of an articulating implement may include a mounting plate, vertical support plates extending outwardly from a top surface of the mounting plate, and a central and side gussets connected to the top surface of the mounting plate and to the outer sides of the vertical support plates. The gussets assist in transitioning lateral or horizontal forces on the vertical support plates to the mounting plate and the end frame of the machine to reduce fatigue cracking at the points of connection of the vertical support plates to the mounting plate. The support structure may further include first and second lower support plates having top edges spaced from each other and connected to the bottom surface of the mounting plate, and bottom edges connected to each other so that the lower support plates and the mounting plate form a triangle in cross-section to further assist in transitioning the forces to the end frame.

Abstract: The present invention relates to a construct for accomplishing fixation of carbon dioxide and/or reduction of carbon dioxide emission in a heterotrophic microorganism (for example, a heterotrophic fermentation strain, such as E. coli), a vector comprising the construct, a heterotrophic microorganism (for example, a heterotrophic fermentation strain, such as E. coli) comprising the construct or being transformed with the vector, and a method for fixing carbon dioxide and/or reducing carbon dioxide emission in a heterotrophic microorganism (for example, a heterotrophic fermentation strain, such as E. coli).

Abstract: A lift arm cross member may connect a tilt lever support to a pair of lift arms. The lift arm cross member may have a top plate with a generally convex outer surface as the outer surface extends from a first end edge to a second end edge, and a bottom plate having first and second end edges, a first planar portion extending from the second end edge, and a curved portion extending from the first planar portion opposite the second end edge. The first end edge of the bottom plate may be connected to an inner surface of the top plate and the second end edge of the first plate may be connected to an inner surface of the bottom plate. A buffer plate may be provided within the lift arm cross member and extend between the inner surfaces of the top and bottom plates.

Abstract: A support structure for a tilt cylinder of a machine that controls movement of an articulating implement may include a mounting plate, vertical support plates extending outwardly from a top surface of the mounting plate, and a central and side gussets connected to the top surface of the mounting plate and to the outer sides of the vertical support plates. The gussets assist in transitioning lateral or horizontal forces on the vertical support plates to the mounting plate and the end frame of the machine to reduce fatigue cracking at the points of connection of the vertical support plates to the mounting plate. The support structure may further include first and second lower support plates having top edges spaced from each other and connected to the bottom surface of the mounting plate, and bottom edges connected to each other so that the lower support plates and the mounting plate form a triangle in cross-section to further assist in transitioning the forces to the end frame.

Abstract: A frame assembly and method for manufacturing such a frame assembly for a vehicle are disclosed. The frame assembly may comprise spaced apart tower walls separated by a middle portion and a foot joined to the tower wall. The foot and the tower wall may define a cavity. The foot may comprise a slanted front member, a rear member disposed opposite to the front member, and a side member. The side member may be disposed between the front and rear members and may be oriented to form an angle ? with the first tower wall.