Abstract: A method and apparatus are for abnormality detection. The method includes: acquiring an estimated value of a movement parameter of a mobile platform of a parallel robot. The estimated value is calculated based on sensing information about a sensor mounted on the mobile platform. Based on the estimated value and a designated value of the movement parameter, the method includes determining whether an abnormality occurs in the parallel robot. By way of the method and apparatus, abnormality of a parallel robot can be detected reliably.

Abstract: Provided is a nano grid protection device for a nano grid including a distributed power supply, a large power grid including the nano grid protection device, and a method for controlling the nano grid protection device. In an embodiment, the nano grid is connected with a bus through the nano grid protection device and a main grid is connected with the bus through a main grid protection device. In an embodiment, the nano grid protection device includes: a signal unit, configured to detect and send current information passing through the nano grid protection device, the current information including the magnitude and direction of the current; a controller, configured to determine, based upon the received current information, whether to send a trip signal or not; and an execution mechanism, configured to execute a trip operation of the nano grid protection device upon receiving the trip signal.

Abstract: A nanogrid and a virtual inverter controller for the nanogrid are disclosed. The nanogrid includes at least one parallel branch, and at least one branch is equipped with a protector. At least one of the protectors is equipped with one virtual inverter controller. The virtual inverter controller includes a sensor component configured to detect at least one characteristic parameter on the branch, and a control component affecting the electrical connection state of the corresponding protector of the virtual inverter controller according to the characteristic parameter.

Abstract: An anomaly detection method and system for a process instrument, and a storage medium are disclosed. The method includes that: a programmable logic controller (PLC) receives measurement data of a process instrument, the measurement data being periodically stored into a historical database so that a service providing system can perform reading and evaluation. At least one virtual function module is integrated on the PLC, a mapping relation is formed between at least one input channel of each virtual function module and output of at least one anomaly diagnosis algorithm disposed on the service providing system, and each anomaly diagnosis algorithm is used for diagnosing whether an anomaly exists in the process instrument. When an anomaly indication outputted by the service providing system is received via an input channel of the virtual function module, the PLC determines that an anomaly exists in the corresponding process instrument.

Abstract: Embodiments of the present disclosure provide method and device for providing service for a programmable logic controller (PLC), including: creating a virtual-functional-module-description file including an address of an input channel of a virtual functional module to be created; and creating the virtual functional module in a PLC based on the virtual-functional-module-description file, assigning the address to the input channel of the virtual functional module, and creating a virtual-functional-module-configuration file including a mapping relation between the input channel and an output of a service provider. The present disclosure proposes a concept of a virtual functional module which is used to map data provided by intelligent data sources outside the PLC to input channel of PLC so that the data can be the same as normal input values used by PLC program.

Abstract: An online system, such as a social networking system, monitors user interactions with news feed stories of the social networking system and divides the user interactions into non-content clicks and content clicks. The non-content clicks indicate a user's interest in news feed stories based on user actions such as comments on, likes, shares, and hides the news feed stories. The content clicks indicate a user's interest in news feed stories based on user actions on different specific portions of multimedia content (e.g., videos) in the news feed stories such as playing, fast forwarding. The social networking system trains a model based on the monitored user interactions with news feed stories and uses the trained model to rank news feed stories for presentation to a user. The ranks of news feed stories for a user are determined based on a likelihood that the user would find the story interesting.

Abstract: An embodiment relates to a curvature measurement apparatus. The apparatus includes a first curvature measurement unit configured to, upon a curvature of an object to be measured being relatively greater than a first curvature, measure the curvature of the object to be measured; and a second curvature measurement unit configured to, upon the curvature of the object to be measured being relatively smaller than a second curvature, measure the curvature of the object to be measured, the second curvature being relatively greater than or equal to the first curvature. The curvature measurement apparatus can improve an accuracy of a curvature of an object to be measured.

Abstract: Isolated DC-DC converters are described. A DC-DC converter is a device which converts a direct current (DC) signal from one voltage to another. An isolated DC-DC converter performs the conversion across an electrical isolation barrier separating two voltage domains. The signal converted from one voltage to another, and transferred from one voltage domain to another, may be a power signal. Described are isolated DC-DC converters which transfer a power signal from one voltage domain to another via an isolator, and a power feedback signal back across the isolator. The isolator is a transformer in some situations.

Abstract: A control system is for a robot. In an embodiment, the control system includes a program executor to translate a motion command for a robot to a format identifiable by a robot control kernel; a robot control kernel to generate robot motion data based on the translated motion command; and a robot Digital Twin to simulate the motion of the robot based on the generated robot motion data and physical conditions of the robot during robot simulation.

Abstract: Photonic Resonator Outcoupler Microscopy (PROM) is a novel, label-free approach for dynamic, long-term, quantitative imaging of a sample on a surface of a photonic crystal (PC) biosensor, in which components of the sample outcouple photons from the resonant evanescent field, resulting in highly localized reductions of the reflected light intensity. By mapping changes in the resonant reflected peak intensity from the PC surface, components of a sample (e.g., focal adhesions) can be detected and dynamically tracked. To demonstrate the simplicity and utility of PROM for focal adhesion imaging, PROM images are compared with biosensor images of surface-bound dielectric permittivity and with fluorescence microscopy images of labeled adhesion molecules in dental stem cells. PROM can dynamically quantify the surface-attached cellular mass density and lateral dimensions of focal adhesion clusters.

Abstract: Power isolators with multiple selectable feedback modes are described. The power isolators may transfer a power signal from a primary side to a second side. A feedback signal may be provided from the secondary side to the primary side to control generation of the power signal on the primary side. In this manner, the power signal provided to the secondary side may be maintained within desired levels. The feedback signal may be generated by feedback circuitry configurable to operate in different modes, such that the feedback signal may be of differing types depending on which feedback mode is implemented.

Abstract: In an embodiment, an arc light sensor includes: a first polarizer, a second polarizer, a magneto-optical material, a first light filter and a processing unit. The first polarizer is used for polarizing incident first target light, to form first polarized light in a first polarization direction. The second polarizer is used for polarizing incident second target light, to form second polarized light in the first polarization direction. The magneto-optical material, in a current magnetic field, uses the current magnetic field to rotate a polarization direction of the first polarized light, to form third polarized light. The first light filter is used for filtering the third polarized light, to form fourth polarized light capable of passing in a second polarization direction. The processing unit is used for determining whether the second target light is arc light according to intensity of the second polarized light and intensity of the fourth polarized light.

Abstract: A method and apparatus for determining a trajectory of a robot's end effector are disclosed. In an embodiment, the apparatus includes a force obtaining device to obtain a collision force of the end effector of the robot, caused by a collision of the end effector upon the collision being detected; and a trajectory determining device to determine a second trajectory of the end effector based on the collision force of the end effector obtained, and based on a recorded first trajectory of the end effector. The recorded first trajectory is a trajectory recorded before the collision, and the second trajectory is a trajectory determined after the collision. As such, an efficient protection for the robot and its working environment at the moment of collision may be achieved.

Abstract: The present application provides a safety control system for an industrial robot and an industrial robot including the safety control system. In an embodiment, the safety control system includes a first safety controller connected to at least one core safety sensor outputting a core safety signal, to receive the core safety signal; and a second safety controller connected to at least one safety-related sensor outputting a safety-related signal, to receive the safety-related signal. In an embodiment, the first safety controller and the second safety controller are respectively connected to a safety actuating system.

Abstract: An online system receives posts that include links to various external pages and presents those posts to users of the online system. When the online system determines an opportunity to present a post to a particular viewing user of the online system, the online system determines a quality metric and an associated value score for the post. The quality metric is determined as a likelihood that the viewing user will view the external page for less than a threshold time period, and is used to adjust the associated value score. The online system compares the value score of the post to the value scores of other posts and selects one or more of the compared posts for presentation to the viewing user of the online system.

Abstract: The present invention provides a microgrid system. The microgrid system includes a microgrid bus, electrically connected to an external grid; microgrid branches, electrically connected to the microgrid bus; nanogrids, electrically connected to the microgrid branches; and microgrid protection devices, each of the microgrid protection devices including at least one of a protection device connected between the microgrid bus and the external grid, protection devices connected between the microgrid branches and the microgrid bus and protection devices connected between nanogrids and microgrid branches, each of the microgrid protection devices being configured to break at least one of an electrical connection between the microgrid bus and the external grid, electrical connections between the microgrid branches and the microgrid bus and an electrical connections between the nanogrids and the microgrid branches upon at least one of the external grid, the microgrid bus and the microgrid branches malfunctioning.

Abstract: Devices and methods for arc fault detection, based on arc sound signals, are disclosed. The device can monitor sound data from a power device by one or more microphones arranged near the power device and extract the characteristic of the sound data. The device can also compare the characteristic of the sound data with the arc fault feature database, and then determine to generate an arc alarm signal. The device is a stand-alone device, which can provide the forecast and early warning of arc faults, and can improve the reliability of arc fault detection.

Abstract: An embodiment relates to a curvature measurement apparatus. The apparatus includes a first curvature measurement unit configured to, upon a curvature of an object to be measured being relatively greater than a first curvature, measure the curvature of the object to be measured; and a second curvature measurement unit configured to, upon the curvature of the object to be measured being relatively smaller than a second curvature, measure the curvature of the object to be measured, the second curvature being relatively greater than or equal to the first curvature. The curvature measurement apparatus can improve an accuracy of a curvature of an object to be measured.

Abstract: A digital assay for a micro RNA (miRNA) or other target analyte in a sample makes use of nanoparticles that absorb light at the resonant wavelength of a photonic crystal (PC). Such nanoparticles locally quench the resonant reflection of light from the PC when present on the surface of the PC. The nanoparticles are functionalized to specifically bind to the target analyte, and the PC surface is functionalized to specifically bind to the nanoparticles that have bound to the target analyte. The sample is exposed to the functionalized nanoparticles, and the individual nanoparticles bound to the PC surface can be identified and counted based on reduced intensity values in the reflected light from the PC. The number of bound nanoparticles that are counted in this way can be correlated to the abundance of the target analyte in the sample.

Abstract: A current transformer and a direct current source based on a current transformer are disclosed. In an embodiment, the current transformer includes two output ends; a first winding and a second winding connected in series between the two output ends; a main core; a bypass core, arranged to be magnetically coupled with the main core. The first winding is wound on a part of the main core and a part of the bypass core, and the second winding is wound on apart of the bypass core. In an embodiment, the current transformer also includes a high-frequency bypass, connected in parallel with the first winding, and used to filter a high-frequency signal. The high-frequency bypass provides a low-impedance path for a high-frequency signal in a primary conductor under measurement, such that the bypass core with the second winding presents less obstruction to the main core, thereby reducing heating.