Abstract: An electromagnetic transient simulation method and apparatus for a voltage source converter (VSC), an electronic device, and a storage medium are provided. The method mainly includes: performing circuit equivalence processing on a voltage source converter with any quantity of ports based on a work mechanism of the voltage source converter; performing discretization processing on the equivalent circuit, to obtain an equivalent target circuit, and determining a node admittance matrix expression and a historical current source expression according to the equivalent target circuit; and constructing a multi-port Norton equivalent model corresponding to the voltage source converter according to the node admittance matrix expression and the historical current source expression, and performing electromagnetic transient simulation on the voltage source converter by using the multi-port Norton equivalent model, to obtain a simulation result.

Abstract: A logistics transport box is provided, and it relates to the technical field of packaging boxes. The logistics transport box includes a box body, a placement assembly, and an installation assembly. The installation assembly includes support components and sliding vibration-damping components. The support components include sliding rails vertically disposed at four inner corners of the box body. The sliding vibration-damping components include upper sliding blocks, lower sliding blocks, upper fixing blocks, and lower fixing blocks. A spring piece is disposed between each of the sliding blocks and a corresponding one of the fixing blocks. The placement assembly includes covering components and connecting components, the covering components include an upper film and a lower film which are oppositely disposed.

Abstract: A logistics transport box is provided, and it relates to the technical field of packaging boxes. The logistics transport box includes a box body, a placement assembly, and an installation assembly. The installation assembly includes support components and sliding vibration-damping components. The support components include sliding rails vertically disposed at four inner corners of the box body. The sliding vibration-damping components include upper sliding blocks, lower sliding blocks, upper fixing blocks, and lower fixing blocks. A spring piece is disposed between each of the sliding blocks and a corresponding one of the fixing blocks. The placement assembly includes covering components and connecting components, the covering components include an upper film and a lower film which are oppositely disposed.

Abstract: A Fabry-Perot cavity array and a spectrum detector, where the Fabry-Perot cavity array includes a first element having a first step and a second element having a second step, the first step and the second step are a two-dimensional step structure; a first step side of the first element is arranged opposite to a second step side of the second element, and a step height change direction of the first step is different from a step height change direction of the second step; a step surface of the first step and a step surface of the second step are plated with a reflective film. By fitting two elements having a two-dimensional step structure, a Fabry-Perot cavity array having a three-dimensional step structure is formed, and it is simple in structure and easy to be processed and implemented.

Abstract: An integrated transmitter chip having a transmitter block, the transmitter block having: a first power divider optically connected to a first input port; a second power divider optically connected to a second input port; a first plurality of optical channels optically branched from the first power divider; a second plurality of optical channels optically branched from the second power divider; a first multiplexer optically connected to a first optical channel of the first plurality of optical channels and a first optical channel of the second plurality of optical channels, and a second multiplexer optically connected to a second optical channel of the first plurality of optical channels and a second optical channel of the second plurality of optical channels. The integrated transmitter chip may be configured to utilize polarization division multiplexing or wavelength division multiplexing to combine optical signals depending on the application of the corresponding integrated transmitter chip.

Abstract: An integrated transmitter chip comprising: at least one input port disposed at a first end of the integrated transmitter chip; a first variable power divider optically connected to each input port of the at least one input port; a second and a third variable power dividers optically branched from each first variable power divider; a first and a second optical channel optically branched from the second variable power divider, a third and a fourth optical channel optically branched from the third variable power divider; and at least one WDM optically attached to corresponding optical channels and configured to selectively modify the polarization of and multiplex corresponding optical signals into a output optical signal, wherein a laser beam is launched into an input port, split by corresponding variable power dividers based upon each dividers corresponding splitting ratio, then multiplexed and combined into an output optical signal having dual polarization modes.

Abstract: A sensor unit that is configured to improve the non-contact, magnetic interface on a gas meter. The configurations may include a pair of magnets that co-rotate in response to a magnet internal to the gas meter. At least one of the magnets may also move longitudinally in proximity to the internal magnet. This feature aligns the magnets with one another to ensure proper magnetic coupling with the internal magnet.

Abstract: An integrated transmitter chip comprising: at least one input port disposed at a first end of the integrated transmitter chip; a first variable power divider optically connected to each input port of the at least one input port; a second and a third variable power dividers optically branched from each first variable power divider; a first and a second optical channel optically branched from the second variable power divider, a third and a fourth optical channel optically branched from the third variable power divider; and at least one WDM optically attached to corresponding optical channels and configured to selectively modify the polarization of and multiplex corresponding optical signals into a output optical signal, wherein a laser beam is launched into an input port, split by corresponding variable power dividers based upon each dividers corresponding splitting ratio, then multiplexed and combined into an output optical signal having dual polarization modes.

Abstract: A server rack cooling arrangement may include a server rack enclosure defining a single undivided interior volume of space and configured to be sealable; two or more open-frame-server-units disposed within the interior volume of space and arranged in a multi-level arrangement, wherein heat-producing-electronic-components may be exposed to environmental conditions of the interior volume of space; a central condenser disposed towards a rear; a coolant reservoir for collecting condensate from the central condenser; at least one nozzle in fluid communication with the coolant reservoir and configured to deliver fine coolant droplets into the interior volume of space for impingement on the heat-producing-electronic-components; and a fan configured to generate an airflow through the two or more open-frame-server-units from a front to the rear in a manner so as to carry coolant vapour generated from impingement of the fine coolant droplets on the heat-producing-electronic-components to the central condenser.

Abstract: A sensor unit that is configured to improve the non-contact, magnetic interface on a gas meter. The configurations may include a pair of magnets that co-rotate in response to a magnet internal to the gas meter. At least one of the magnets may also move longitudinally in proximity to the internal magnet. This feature aligns the magnets with one another to ensure proper magnetic coupling with the internal magnet.

Abstract: A server rack cooling arrangement may include a server rack enclosure defining a single undivided interior volume of space and configured to be sealable; two or more open-frame-server-units disposed within the interior volume of space and arranged in a multi-level arrangement, wherein heat-producing-electronic-components may be exposed to environmental conditions of the interior volume of space; a central condenser disposed towards a rear; a coolant reservoir for collecting condensate from the central condenser; at least one nozzle in fluid communication with the coolant reservoir and configured to deliver fine coolant droplets into the interior volume of space for impingement on the heat-producing-electronic-components; and a fan configured to generate an airflow through the two or more open-frame-server-units from a front to the rear in a manner so as to carry coolant vapour generated from impingement of the fine coolant droplets on the heat-producing-electronic-components to the central condenser.

Abstract: Systems and methods for defining a custom segment in a set of behavioral data are provided. A described method includes receiving a set of behavioral data associated with a plurality of user devices and identifying multiple cohort groups, each of the cohort groups including one or more of the user devices. The behavioral data includes a behavior metric for each of the user devices and the cohort groups are identified based on the behavior metric for each of the user devices. The method further comprises generating a segmentation interface including a graphical visualization of the multiple cohort groups and causing the segmentation interface to be presented via a user interface device. The method further comprises defining a custom segment of the behavioral data based on a user selection of one or more of the multiple cohort groups via the segmentation interface.

Abstract: A manifold assembly configured to measure differential pressure of fluid. The manifold assembly may have a monolithic body with an internally drilled fluid pathway. The body supports a differential pressure transducer that communicates, on either end, with the internally drilled fluid pathway. This configuration can generate data that defines pressure drop across impellers or other mechanisms on metrology hardware (or “gas meters”). Utilities can use this data to diagnose health or other conditions on the gas meter in the field.

Abstract: The present disclosure provides a method and apparatus for virtual walking, which relates to the field of games. In the present disclosure, geometric-shape attribute parameters of a physical area in which a user walks may be acquired. Then, a plurality of virtual areas each matching the geometric-shape attribute parameters may be obtained in a virtual scene. Further, when the user walks to a corner of a physical area, a target virtual area is selected from the plurality of virtual areas and a virtual person corresponding to the user may be transferred from a current virtual area to the target virtual area. The current virtual area may be a virtual area among the plurality of virtual areas corresponding to the user's current walking status. Therefore, the method and apparatus for virtual walking in the present disclosure enable infinite virtual spaces within the confines of limited physical spaces without visual deviation.

Abstract: A sensor unit that is configured to improve the non-contact, magnetic interface on a gas meter. The configurations may include a pair of magnets that co-rotate in response to a magnet internal to the gas meter. At least one of the magnets may also move longitudinally in proximity to the internal magnet. This feature aligns the magnets with one another to ensure proper magnetic coupling with the internal magnet.

Abstract: A gas meter (100) and like metering systems that are configured for use underwater. The gas meter may embody a positive displacement rotary gas meter having a meter body with impellers that counter-rotate in response to material flow. The gas meter can also comprise an index unit having an electronics assembly to generate a value that equates rotation of impellers with a parameter of the material flow. The gas meter can further comprise a connective interface having a first part and a second part, one each disposed on the meter unit and the index unit, respectively, the first part and the second part coupling with one another to provide data to the electronics assembly, the data corresponding with operating conditions on the meter unit and rotation of the impellers. In one example, the first part and the second part are configured so that the meter unit and the index unit are operable underwater to generate the value.

Abstract: Technologies relating to determining data variable dependencies to facilitate code execution are disclosed. An example method includes: identifying a set of programming statements having a plurality of data parameters; identifying first data parameters associated with a first programming statement in the set of programming statements; determining one or more parameter dependencies associated with the first data parameters; and determining, based on the one or more parameter dependencies, a first execution performance of the first programming statement. The method may further include: determining a second execution performance of the second programming statement and scheduling execution of the first programming statement and of the second programming statement based on the first and second execution performances.