Abstract: A method and system of robotic arm safety detection based on EtherCAT automation are provided. The method includes: issuing a control data through the protocol module to control the robotic arm to complete an automation operation process by the control system module, and receiving joint data fed back in real-time of the sensor module; acquiring a real-time data of the robotic arm by the data capture module; wherein the real-time data includes protocol data and joint data; the joint data is acquired by the data capture module through the sensor module; performing a protocol data rule matching and physical process detection by the intrusion detection module based on the real-time data, and obtaining an intrusion detection result; wherein the intrusion detection result is configured to detect whether an intrusion behavior occurs during a normal operation of the robotic arm.

Abstract: An online learning system based on cloud-client integration multimodal analysis includes: an online learning module used for providing an online learning interface for a user and collecting image data, physiological data, posture data and interaction log data during an online learning process of the user; a multimodal data integration decision module used for preprocessing the image data, physiological data and posture data, extracting corresponding features, and making a comprehensive decision in combination with the interaction log data to obtain a current learning state of the user; a cloud-client integration system architecture module used for coordinating use of computing resources of a cloud server and a local client according to usage conditions of the cloud server and the local client, and visually displaying a progress of computing tasks; a system interaction adjustment module used for adjusting the online learning module according to the current learning state of the user.

Abstract: An online shopping system based on facial emotional state analysis and a method thereof is provided. The system includes: an online shopping module configured for providing an online shopping interactive interface for a user and collecting facial image data and interactive behavior data of the user in an online shopping process; a facial expression recognition module configured for recognizing an emotional state of the user according to the collected facial image data in the online shopping process of the user; a shopping intention analysis module configured for deciding a shopping intention of the user according to the recognized emotional state and the interactive behavior data of the user; and a shopping recommendation adjustment module configured for dynamically adjusting a commodity recommendation strategy for the user according to the decided shopping intention of the user.

Abstract: A test method and system for PLC security defense device are provided. The method including: acquiring by the first test end the information about the device under test, involving the type of communication mode, the type of PLC, the attack type and/or attack rule; after the attack messages to the device under test being generated and sent to the device under test, obtaining by the first test end the assessment results of the PLC security defense device on the basis of the second test end's response message. This is a fast, objective and thorough assessment method to testify security defense function of the device under test.

Abstract: A test method and system for PLC security defense device are provided. The method including: acquiring by the first test end the information about the device under test, involving the type of communication mode, the type of PLC, the attack type and/or attack rule; after the attack messages to the device under test being generated and sent to the device under test, obtaining by the first test end the assessment results of the PLC security defense device on the basis of the second test end's response message. This is a fast, objective and thorough assessment method to testify security defense function of the device under test.

Abstract: Lawn sprinklers and related devices receive a fluid under pressure and convert its potential energy to kinetic energy; and their spreading range depends on the kinetic energy of the issuing jets. The object of present invention is a device of this class in which, however, the energy of a fluid from a single source is internally so redistributed, through pressure exchange, that different jets are made to issue from it at different kinetic energy levels, thereby making it possible for the sprinkling or spreading to cover a considerably wider area (for any given source pressure) and to do so more evenly.