Abstract: Provided is a liquid crystal handwriting board. The liquid crystal handwriting board includes: a liquid crystal panel, a photosensitive assembly, and a control assembly; wherein the liquid crystal panel includes a first substrate and a second substrate that are opposite; the photosensitive assembly includes a plurality of photosensitive elements; and the control assembly is electrically connected to the liquid crystal panel and the photosensitive assembly, and is configured to determine position information of a pixel region for erasure by detecting position information of target light irradiated to the liquid crystal panel by the photosensitive assembly and supply a pixel voltage to the plurality of pixel electrodes in the pixel region for erasure, such that a voltage difference is present between the plurality of pixel electrodes in the pixel region for erasure and the common electrode.

Abstract: A construction method for a radiation-proof concrete hole reserved split bolt includes: 1) mounting a hole reserved sleeve; 2) mounting an inclined recoverable split bolt; 3) mounting an inclined split bolt; 4) fixing the inclined recoverable split bolt and an inclined split bolt main body; 5) pouring concrete, and dismantling related components; 6) plugging the inclined split bolt main body; and 7) plugging the hole reserved sleeve. According to the construction method, the hole reserved sleeve is obliquely arranged, the inner side of the hole reserved sleeve is sprayed with a radiation-proof coating with the functions of reducing radiation ray reflection and absorbing certain radiation rays, and in addition, after the construction of a pipeline or a line in the hole reserved sleeve is finished, the openings at both ends of the hole reserved sleeve are plugged with a radiation-proof mortar incorporated with a micro-expanding agent and a waterproof agent.

Abstract: The embodiments of the disclosure provide a method, apparatus, device and storage medium for presenting information, which relate to the technical field of computers. The method includes: obtaining object search information, in response to the object search information being object category information, determining a target object category corresponding to the object search information, and presenting object information of a plurality of target objects corresponding to the target object category in a search result presentation page; where all the plurality of target objects are different, and object information of a target object includes object attribute information and image resource information of the target object. By employing the above technical solution, when the user is searching the object category, object information of a plurality of target objects different from each other corresponding to the target object category is presented in the search result page.

Abstract: A method for quantitatively detecting hydroquinone including: using a “NaClO2—C4H13NO—Na2S4O6” CAT clock reaction system as a detection solution, wherein C4H13NO is tetramethylammonium hydroxide; recording a graph showing that a pH value in the CAT clock reaction system changes with time; obtaining the fact that the CAT clock reaction systems show different induction times to added solutions of hydroquinone with different concentrations; establishing a working curve based on a relationship between the concentrations of hydroquinone in the CAT clock reaction system and the induction times, thereby achieving a quantitative detection of the hydroquinone in a test sample.

Abstract: A metal heating film includes: a nickel-chromium-alloy-based metal heating film or a nickel-based metal heating film; and at least one of metal elements Ru, Pt, and Pd. In an embodiment.

Abstract: The present disclosure provides a method for determining an ore-forming environment of a porphyry deposit based on a tourmaline component, including the following steps: collecting a tourmaline-containing rock in the porphyry deposit to obtain a rock sample; performing pretreatment on the rock sample to obtain a treated sample; performing an in-situ tourmaline trace element test on the treated sample to obtain a test result; performing data processing and interpretation on the test result to obtain tourmaline trace element data; establishing a discrimination factor based on the tourmaline trace element data; and determining the ore-forming environment based on the discrimination factor. The present disclosure can quickly recognize a forming environment of a newly discovered porphyry deposit, thereby summarizing a rule and quickly giving guidance for a next prospecting direction.

Abstract: The present application relates to the field of error detection technology. An error detection method is provided. The error detection method includes: obtaining a target pose of an end of an operating arm; acquiring a positioning image; recognizing, in the positioning image, a plurality of pose identifications located on the end of the operating arm, the plurality of pose identifications including different pose identification patterns; determining an actual pose of the end of the operating arm based on the plurality of pose identifications; and generating a control signal related to a fault in response to the target pose and the actual pose meeting an error detection condition.

Abstract: The present invention relates to sulfur based polymers and a process of making sulfur based polymers. The invention also relates to sorbents comprising the sulfur-based polymers. The invention also relates to the use of such polymers and sorbents in metal remediation or extraction. The invention also relates to methods of removing heavy metals from fluids.

Abstract: A humanoid finger mechanism includes: a finger seat; at least one proximal knuckle, located at an outer side of the finger seat; at least one middle knuckle, located at an outer side of the at least one proximal knuckle; a distal knuckle, located at an outer side of the at least one middle knuckle; a driver, located at an inner side of the finger seat; a driving cable, wherein a first end of the driving cable is connected with the driver, while a second end of the driving cable is connected with the distal knuckle after sequentially penetrating through the finger seat, the at least one proximal knuckle and the at least one middle knuckle; and a tension band, a first end of the tension band is connected with the finger seat, while a second end of the tension band is connected with the distal knuckle.

Abstract: Implementations of the present specification describe an intention identification model training method and apparatus, and an intention identification method and apparatus. According to the methods in the implementations, training of a target question can be weakened in the first several rounds of model training, and then an intention identification model obtained in the first several rounds of training can be used to identify intentions corresponding to answers that are to be distinguished. Further, the intention identification model is trained again after labels of these intentions are reset, so that the intention identification model obtained through training can also have a good identification effect on an answer to the target question, thereby improving accuracy of intention identification.

Abstract: Implementations of the present specification disclose an event risk detection method, apparatus, and device.

Abstract: An apparatus for wireless communication, comprising a processing unit adapted for executing a beam-alignment protocol based on a sequence of communication data-patterns, each associated with one of a sequence of alignment subcarrier-frequency slots. The protocol comprises receiving a plurality of receive information records, one from each of a plurality of wireless end devices and indicative of a plurality of signal qualities of the sequence of beam-alignment signals. Each beam alignment signal is received by the respective wireless end device in an alignment subcarrier-frequency-slot associated with the respective communication data-pattern associated with the beam-alignment signal. The protocol further comprises computing according to the plurality of receive information records a plurality of preferred communication channels, each for one of a plurality of wireless access points, and configuring the plurality of wireless access points according to the plurality of preferred communication channels.

Abstract: The pull-out head integrated waterway structure, including an integrated waterway body, the waterway body is provided with a second valve cavity and a first valve cavity through the waterway body, the first valve cavity is connected to the water inlet end of the waterway body through a first cavity, the first valve cavity and second valve cavity are connected through a second cavity, the second valve cavity is connected to the water outlet end of the waterway body through the outlet cavity, a first control spigot is provided in the first valve cavity for controlling the size of water flow, a second control spigot is provided in the second valve cavity for switching water flow to a different outlet cavity. The waterway body adopts integrated injection molding, avoiding the connection of different parts, improving the strength performance of the waterway, improving the strength of the product.

Abstract: The invention discloses a method for preparing graphene by mechanical exfoliation and application thereof. The method includes the following steps of: (1) dispersing graphite raw material in a foaming agent aqueous solution to obtain a graphite pre-dispersing solution; and (2) subjecting the graphite pre-dispersing solution to milling, washing with water, and centrifugal classification, to obtain the graphene; wherein the foaming agent aqueous solution includes the following components: sodium alpha-olefin sulfonate, sodium alcohol ether sulphate, diethanolamine coconut fatty acid, polyethylene glycol, and water. In the invention, the foaming agent produce a large amount of stable and fine foam in a closed milling cavity, which can produce jostle effect, support the graphite, and increase the contact area between the graphite and the milling medium, so as to achieve good exfoliation effect.

Abstract: The present application relates to the field of error detection technology. An error detection method is provided. The error detection method includes: obtaining a target pose of an end of an operating arm; acquiring a positioning image; recognizing, in the positioning image, a plurality of pose identifications located on the end of the operating arm, the plurality of pose identifications including different pose identification patterns; determining an actual pose of the end of the operating arm based on the plurality of pose identifications; and generating a control signal related to a fault in response to the target pose and the actual pose meeting an error detection condition.

Abstract: The present application relates to the field of error detection technology. An error detection method and a robot system are provided. The error detection method includes: obtaining a target pose of an end of an operating arm; acquiring a positioning image; recognizing, in the positioning image, a plurality of pose identifications located on the end of the operating arm; recognizing, based on the plurality of pose identifications, an angle identification located on the end of the operating arm, the angle identification having a position association relationship with a first pose identification of the plurality of pose identifications; determining, based on the angle identification and the plurality of pose identifications, an actual pose of the end of the operating arm; and generating, in response to the target pose and the actual pose meeting an error detection condition, a control signal related to a fault.

Abstract: A growable continuum instrument includes a growable tube and one or more serially connected continuum structures. The growable tube includes an inner layer, an outer layer, and a fluid chamber between the inner and outer layers. The growable tube includes a turnable region where the inner and outer layers are connected and turnable. The continuum structure is located in the growable tube. The continuum structure includes a plurality of spacer discs and a plurality of connecting structures. The connecting structure includes one or more flexible structural bones, the two ends of which are respectively fixedly connected with the adjacent spacer discs, and are distributed along the circumferential direction of the spacer discs. The plurality of connecting structures include at least a first and second connecting structures, and the flexible structural bones of the first and second connecting structures are distributed differently along the circumferential direction of the spacer disc.

Abstract: A switching power supply unit includes: a transformer; an inverter circuit including first to fourth switching devices, first to third capacitors, first and second rectifying devices, a resonant inductor, and a resonant capacitor; and a driver. The first to fourth switching devices are coupled in series. The first and second capacitors are coupled in series. The first rectifying device is disposed between a first connection point between the first and second capacitors and a second connection point between the first and second switching devices. The second rectifying device is disposed between the first connection point and a third connection point between the third and fourth switching devices. The third capacitor is disposed between the second and third connection points. The resonant capacitor, the resonant inductor, and a primary winding are coupled in series between a fourth connection point between the second and third switching devices and the first connection point.