Abstract: Disclosed are a low-cost high-efficiency drip irrigation system for a cotton field and a use method thereof. The drip irrigation system for a cotton field includes a filtering device and a water supply device; wherein the filtering device adopts different types of single filtering devices or combined filtering devices according to different water source types; the water supply device includes multiple stages of main pipes, submain pipes and laterals; the laterals (a drip irrigation tape with labyrinth on one side or a drip irrigation tape inlaid with emitters inside) are laid on the surface of the ground and located below a mulch film. The drip irrigation system adopts the design of large flow (1.5-3.4 L/h), slightly larger pipe diameter (>75 mm), low water pressure (operating pressure of drip irrigation tape being 0.03-0.07 MPa) and suitable drip irrigation uniformity (80%-90%).

Abstract: A bidirectional isolated resonant converter includes a first side circuit, a second side circuit, and a resonant tank circuit. The resonant tank circuit includes a first resonant capacitor, a resonant inductor, an isolated transformer and a second capacitor. The first resonant capacitor, the resonant inductor and a first side winding of the isolated transformer are connected in series. A second side winding of the isolated transformer and the second capacitor are connected in series. The resonant inductor and the isolated transformer are integrated into an integrated magnetic component, wherein a magnetic core of the integrated magnetic component includes an inductor magnetic core portion on which an inductor winding is wound, a transformer magnetic core portion on which the first side winding and the second side winding are wound, and a common magnetic core portion shared by the resonant inductor and the isolated transformer to form closed magnetic paths, respectively.

Abstract: An online static security assessment (SSA) method based on a quasi steady-state (QSS) model is applied to a power system. An input to the method includes a post-contingency state of the power system for each of a set of contingencies. The following operations are performed for each contingency. Using the QSS model of the post contingency state of the power system, a steady-state voltage magnitude is calculated for each bus in the power system by solving a system of equations. The system of equations is formulated according to a time-domain stability model of the power system and includes nonlinear differential algebraic equations (DAE) with continuous and discreet variables. The derivative terms of short-term state variables in the DAE are set to zero. The method compares the calculated voltage magnitude with a limit, classifies each contingency as secure, critical or insecure, and determines a control action in response to the classification.

Abstract: Rendering a web element in a web page in an integrated development environment is provided. A reference address is extracted from code of a web page. The reference address references a web element. The web element is obtained based on the reference address and in response to the reference address indicating that the web element is an embedded web element. The web element is added to a resource pool. The web element of the resource pool is rendered in the web page.

Abstract: A bidirectional isolated resonant converter includes a first side circuit, a second side circuit, and a resonant tank circuit. The resonant tank circuit includes a first resonant capacitor, a resonant inductor, an isolated transformer and a second capacitor. The first resonant capacitor, the resonant inductor and a first side winding of the isolated transformer are connected in series. A second side winding of the isolated transformer and the second capacitor are connected in series. The resonant inductor and the isolated transformer are integrated into an integrated magnetic component, wherein a magnetic core of the integrated magnetic component includes an inductor magnetic core portion on which an inductor winding is wound, a transformer magnetic core portion on which the first side winding and the second side winding are wound, and a common magnetic core portion shared by the resonant inductor and the isolated transformer to form closed magnetic paths, respectively.

Abstract: An online static security assessment (SSA) method based on a quasi steady-state (QSS) model is applied to a power system. An input to the method includes a post-contingency state of the power system for each of a set of contingencies. The following operations are performed for each contingency. Using the QSS model of the post contingency state of the power system, a steady-state voltage magnitude is calculated for each bus in the power system by solving a system of equations. The system of equations is formulated according to a time-domain stability model of the power system and includes nonlinear differential algebraic equations (DAE) with continuous and discreet variables. The derivative terms of short-term state variables in the DAE are set to zero. The method compares the calculated voltage magnitude with a limit, classifies each contingency as secure, critical or insecure, and determines a control action in response to the classification.

Abstract: The present disclosure provides a high-voltage transformer and an electronic power apparatus. The high-voltage transformer includes a magnetic core, a secondary coil unit, and a primary coil unit. The secondary coil unit includes a secondary winding; and the primary coil unit includes a primary winding and an insulating portion. The insulating portion forms at least one through hole. At least one primary winding encircle at least one through hole and is wrapped by the insulating portion and fixed in the insulating portion. The magnetic core passes through at least one through hole. A shielding layer is formed on a surface of the insulating portion, and the shielding layer is used for connecting a safety ground.

Abstract: An aspect of generating a product model includes extracting from source code of an application system at least one transaction definition associated with the source code. Each transaction definition describes a transaction in a product implemented by the source code. An aspect also includes dividing the transaction definition into one or more product categories, and obtaining a product component associated with one of the product categories from the source code so as to generate the product model. The product component includes at least one product parameter associated with the product category, and the product model includes an association relationship between the product category and the at least one product parameter.

Abstract: The present disclosure provides a high-voltage transformer and an electronic power apparatus. The high-voltage transformer includes a magnetic core, a secondary coil unit, and a primary coil unit. The secondary coil unit includes a secondary winding; and the primary coil unit includes a primary winding and an insulating portion. The insulating portion forms at least one through hole. At least one primary winding encircle at least one through hole and is wrapped by the insulating portion and fixed in the insulating portion. The magnetic core passes through at least one through hole. A shielding layer is formed on a surface of the insulating portion, and the shielding layer is used for connecting a safety ground.

Abstract: A center-tapped transformer comprises a magnetic core, and windings including a primary winding and a secondary windings. The primary winding comprises at least one layer of a primary effective conductor, and the secondary winding comprises at least one layer of a first secondary effective conductor and at least one layer of a second secondary effective conductor. The total thickness hp of the primary effective conductor and the total thickness hs of the secondary effective conductor satisfy: 0.65<hp/hs<0.8, wherein hp is equal to the sum of the thicknesses dp of all the layers of the primary effective conductor, and hs is equal to the sum of the thicknesses ds of all the layers of the first and the second secondary effective conductor.

Abstract: A magnetic component and a transformer are provided by the present disclosure. The magnetic component includes: at least three core columns; and a winding wound around at least one of the at least three core columns; wherein a medium having a relative initial permeability equal to 1 is disposed on at least one side of the at least three core columns. In the present disclosure, a conventional magnetic cover board with a high relative initial permeability is replaced by a medium with a relative initial permeability (ur) satisfied ur=1, such as air or a cover board.

Abstract: A converter includes a transformer module, a primary side circuit module, and a secondary side circuit module. The transformer module includes a magnetic core group and a winding. The winding includes a primary winding and a secondary winding, and is further installed on the magnetic core group. The primary side circuit module is coupled to the primary winding. The secondary side circuit module is coupled to the secondary winding. The primary side circuit modules or the secondary side circuit module has overlapping vertical projection area on a first plane with the winding, and the first plane is a plane in a horizontal direction of the winding.

Abstract: A center-tapped transformer comprises a magnetic core, and windings including a primary winding and a secondary windings. The primary winding comprises at least one layer of a primary effective conductor, and the secondary winding comprises at least one layer of a first secondary effective conductor and at least one layer of a second secondary effective conductor. The total thickness hp of the primary effective conductor and the total thickness hs of the secondary effective conductor satisfy: 0.65<hp/hs<0.8, wherein hp is equal to the sum of the thicknesses dp of all the layers of the primary effective conductor, and hs is equal to the sum of the thicknesses ds of all the layers of the first and the second secondary effective conductor.

Abstract: A magnetic component and a transformer are provided by the present disclosure. The magnetic component includes: at least three core columns; and a winding wound around at least one of the at least three core columns; wherein a medium having a relative initial permeability equal to 1 is disposed on at least one side of the at least three core columns. In the present disclosure, a conventional magnetic cover board with a high relative initial permeability is replaced by a medium with a relative initial permeability (ur) satisfied ur=1, such as air or a cover board.

Abstract: An aspect of generating a product model includes extracting from source code of an application system at least one transaction definition associated with the source code. Each transaction definition describes a transaction in a product implemented by the source code. An aspect also includes dividing the transaction definition into one or more product categories, and obtaining a product component associated with one of the product categories from the source code so as to generate the product model. The product component includes at least one product parameter associated with the product category, and the product model includes an association relationship between the product category and the at least one product parameter.

Abstract: Rendering a web element in a web page in an integrated development environment is provided. A reference address is extracted from code of a web page. The reference address references a web element. The web element is obtained based on the reference address and in response to the reference address indicating that the web element is an embedded web element. The web element is added to a resource pool. The web element of the resource pool is rendered in the web page.

Abstract: A tablet touch display device is disclosed. The tablet touch display device includes a switch for generating a first control signal and a second control signal and comprising a slide slid by an external force to adjust the first control signal and the second control signal, a touch device for outputting a touch signal such that the tablet touch display device executes a touch function, an accelerometer for outputting a rotate signal such that the tablet touch display device executes a screen rotation function, a control module coupled to the switch, the touch device and the accelerometer for outputting a display signal according to the first control signal, the second control signal, the touch signal and the rotate signal, and a display coupled to the control module for displaying a screen associated with the touch function and the screen rotation function according to the display signal.

Abstract: A converter includes a transformer module, a primary side circuit module, and a secondary side circuit module. The transformer module includes a magnetic core group and a winding. The winding includes a primary winding and a secondary winding, and is further installed on the magnetic core group. The primary side circuit module is coupled to the primary winding. The secondary side circuit module is coupled to the secondary winding. The primary side circuit modules or the secondary side circuit module has overlapping vertical projection area on a first plane with the winding, and the first plane is a plane in a horizontal direction of the winding.