Abstract: An intelligent identification and warning method for an uncertain object of a production line in a digital twin environment, includes: establishing a model library for uncertain physical objects from a non-production line system; adding attribute data to the uncertain physical objects from the non-production line system; importing an established model library and added attribute data for the uncertain physical objects from the non-production line system into a model library of an existing DT production line system; performing auto-detection on an uncertain physical object entering a production line system; performing auto-detection on an actual size of the uncertain physical object entering the production line system; warning a danger for an unsafe object by means of voice prompting, system alarming and information pushing; matching a corresponding three-dimensional (3D) model in the established model library for a safe object; and loading a matched 3D model to the DT production line system.

Abstract: A material completeness detection method configured to detect whether materials of a target object in a physical production line are complete, includes: inputting an image of the target object in the physical production line into a material completeness detection algorithm to acquire a first detection result; inputting a virtual model of the target object in a virtual production line into the material completeness detection algorithm to acquire a second detection result, where the virtual production line is a DT of the physical production line; and acquiring a material completeness detection result of the target object based on the first detection result and the second detection result. The embodiments of the present disclosure can realize efficient and accurate material completeness detection.

Abstract: Methods and systems for associating labels between multiple sensors. One of the methods includes generating user interface presentation data that, when presented on a user device, causes the user device to display a user interface that: displays the images in the sequence of images and data identifying the first and second object tracks, and is configured to receive user inputs that associate first object tracks with second object tracks; and providing the user interface presentation data for presentation on the user device.

Abstract: An oscillating power tool includes an outer housing, and an inner housing positioned within the outer housing. A motor and a drive mechanism are supported by the inner housing. The drive mechanism includes an output shaft that is rotational in an oscillating manner and that defines an output axis. A damping element is positioned between the inner housing and the outer housing through which the inner housing is mounted to the outer housing, thereby attenuating vibration transmitted to the outer housing from the inner housing. An over-travel limit member is positioned between the inner housing and the outer housing. In response to relative movement between the inner housing and the outer housing while the power tool is in use, the limit member is configured to prevent direct contact between the inner housing and the outer housing, inhibiting vibration produced by the motor and/or drive mechanism from bypassing the damping element.

Abstract: The disclosure provides a photodegradant for carbamazepine, a method and an apparatus for degrading carbamazepine, and relates to the technical filed of degradation of organic pollutants. The photodegradant provided by the disclosure includes a composite solution of a persulfate and a sulfite. In the disclosure, ultraviolet (UV), the persulfate (PS) and the sulfite (S(IV)) are combined to degrade carbamazepine, during which hydrogen sulfate (HSO3?) generated by the hydrolysis of sulfite in water participates in the reaction to produce a large amount of SO4?? and HO?, thus improving the degradation rate and degradation efficiency of carbamazepine. The composite advanced oxidation system, i.e., the ultraviolet/persulfate/sulfite (UV/PS/S(IV)) system, provided by the disclosure has stronger oxidizability than the ultraviolet/persulfate (UV/PS) system and the ultraviolet/sulfite (UV/S(IV)) system, and results in high degradation rate and high degradation efficiency of carbamazepine.

Abstract: An intelligent identification and warning method for an uncertain object of a production line in a digital twin environment, includes: establishing a model library for uncertain physical objects from a non-production line system; adding attribute data to the uncertain physical objects from the non-production line system; importing an established model library and added attribute data for the uncertain physical objects from the non-production line system into a model library of an existing DT production line system; performing auto-detection on an uncertain physical object entering a production line system; performing auto-detection on an actual size of the uncertain physical object entering the production line system; warning a danger for an unsafe object by means of voice prompting, system alarming and information pushing; matching a corresponding three-dimensional (3D) model in the established model library for a safe object; and loading a matched 3D model to the DT production line system.

Abstract: An oscillating power tool has a housing including a handle portion defining a handle axis and a head portion defining an output axis that is perpendicular to the handle axis. The head portion includes a front face intersected by the handle axis. A drive mechanism includes an output shaft configured to oscillate about the output axis in a rotational manner in response receiving torque from a motor. A lighting assembly is configured to illuminate a workpiece in front of the head portion of the housing. The lighting assembly includes a lens arranged on the front face of the housing, a holder coupled to the lens, a plurality of printed circuit boards supported by the holder, and an LED arranged on each of the printed circuit boards. In response to being activated, the LEDs are configured to project a wide-angle beam of light through the lens.

Abstract: An intelligent material completeness detection and configuration method based on digital twin and augmented reality (AR) includes: constructing a digital twin model base and knowledge base of an incomplete material; importing the digital twin model base and knowledge base of the incomplete material respectively into a model database and a knowledge database in a digital twin system database; sending materials to be detected into a vision-based material completeness detection platform, sorting out an incomplete material, acquiring corresponding data, and importing the data into an incomplete material information database; performing, based on an AR device, perception and reconstruction of incomplete material configuration; matching a configuration plan of the incomplete material in a digital twin relational database, and performing a virtual-real fusion in the AR device; and allowing, a worker to rapidly and accurately find a location and problem type of the incomplete material and configuration the incomplete

Abstract: The disclosure provides a method and a system for predicting disinfection by-products in drinking water. The method includes: acquiring water age prediction data of the drinking water to be predicted and water quality data of the drinking water to be predicted; inputting the water age prediction data and the water quality data into an adaptive genetic BP neural network model for predicting the disinfection by-products in the drinking water to obtain prediction values of the disinfection by-products in the drinking water. The disinfection by-products in a water supply pipe network can be predicted efficiently and economically by using the method and the system for predicting the disinfection by-products in the drinking water provided by the disclosure.

Abstract: A method and a system for predicting a medium-long term water demand of a water supply network including: building a gray model; acquiring an urban historical water demand data set; processing the historical water demand data set to obtain a processed water demand data set; inputting the processed water demand data set into the gray model to obtain a medium-long term water demand prediction value; acquiring a medium-long term water demand actual value; obtaining a first prediction error according to the medium-long term water demand prediction value and the medium-long term water demand actual value; inputting the first prediction error into an artificial neutral network model to repeatedly conduct a prediction so as to obtain a second prediction error; predicting a medium-long term water demand of the water supply network according to the medium-long term water demand prediction value and the second prediction error.

Abstract: The present invention provides a biological morph-genetic WO3 photocatalyst and a preparation method and application thereof, and belongs to the technical field of photocatalysis The preparation method of the present invention includes the following steps: impregnating a rice husk into a tungsten source solution, and roasting an obtained solid material after solid-liquid separation to obtain the biological morph-genetic WO3 photocatalyst.

Abstract: An exemplary portable electronic device includes a housing defining an opening, an internal fixing element including a pair of protruding blocks and defining a groove in communication with the opening, and a support mechanism. The groove defines a stepped structure and includes a larger groove portion, and a smaller groove portion communicating with the larger groove portion. The support mechanism is slidably receivable in the housing, and includes a support and a slider defining a recess. The slider includes a connection portion received in the recess and a head set atop the connection portion. The connection portion abuts the pair of the protruding blocks when the slider is in a retracted position. The head is received in the larger groove portion and slidably resting on a step formed between the larger and smaller groove portions. The support includes a body and a board connected to one end of the body.

Abstract: An exemplary portable electronic device includes a housing defining an opening, an internal fixing element including a pair of protruding blocks and defining a groove in communication with the opening, and a support mechanism. The groove defines a stepped structure and includes a larger groove portion, and a smaller groove portion communicating with the larger groove portion. The support mechanism is slidably receivable in the housing, and includes a support and a slider defining a recess. The slider includes a connection portion received in the recess and a head set atop the connection portion. The connection portion abuts the pair of the protruding blocks when the slider is in a retracted position. The head is received in the larger groove portion and slidably resting on a step formed between the larger and smaller groove portions. The support includes a body and a board connected to one end of the body.