Abstract: In one aspect of the present application, a shell-shaped tooth repositioner is provided, it comprises: N successive shell-shaped tooth repositioners corresponding to N successive steps, respectively, where each of the N shell-shaped tooth repositioners is for repositioning teeth from an initial tooth arrangement of a corresponding step to a target tooth arrangement of the corresponding step, where a first bite plate is provided on a lingual side of a portion corresponding to a first tooth of each of the N shell-shaped tooth repositioners, for opening bite of anterior teeth, where relative positions between the first bite plates on the N shell-shaped tooth repositioners and the first tooth are such that each of the N shell-shaped tooth repositioners is able to open bite of the anterior teeth to an extent that is substantially consistent with a target extent, where N is a natural number greater than 3.

Abstract: In one aspect of the present application, a shell-shaped tooth repositioner is provided, it comprises: N successive shell-shaped tooth repositioners corresponding to N successive steps, respectively, where each of the N shell-shaped tooth repositioners is for repositioning teeth from an initial tooth arrangement of a corresponding step to a target tooth arrangement of the corresponding step, where a first bite plate is provided on a lingual side of a portion corresponding to a first tooth of each of the N shell-shaped tooth repositioners, for opening bite of anterior teeth, where relative positions between the first bite plates on the N shell-shaped tooth repositioners and the first tooth are such that each of the N shell-shaped tooth repositioners is able to open bite of the anterior teeth to an extent that is substantially consistent with a target extent, where N is a natural number greater than 3.

Abstract: One aspect of the present application provides an attachment mounting template assembly for adhering an attachment at a selected position on a surface of a selected tooth, wherein the attachment mounting template assembly comprises an attachment mounting template, which is a one-piece shell, and forms a tooth-receiving cavity and an attachment holder receiving portion at a selected position; an attachment holder received in the attachment holder receiving portion for retaining and correctly positioning an attachment within the attachment holder receiving portion; and an attachment which is to be adhered onto a tooth' surface to form a protrusion, and to interact with a shell-shaped tooth repositioner to provide an auxiliary force system for an orthodontic treatment, wherein the attachment holder is located between the attachment holder receiving portion and the attachment, when the attachment mounting template assembly is put on a patient's teeth, the attachment is located at a selected position on a surface

Abstract: The present disclosure belongs to the field of intelligent wearing technology, and discloses an eye tracking apparatus and an eye tracking device, which are designed to improve the problem that the existing eye tracking apparatus based on a pupil-cornea reflection method is susceptible to ambient light interference. The eye tracking apparatus includes a mounting frame, an eye tracking component and a hood, and the mounting frame is configured to be connected with a head-mounted apparatus; the eye tracking component and the hood are disposed on the mounting frame, and the hood is capable of providing an enclosure between the mounting frame and a face of a user. The eye tracking device includes a head-mounted apparatus and the above eye tracking apparatus. The eye tracking apparatus and the eye tracking device of the present disclosure are used for achieving eye tracking.

Abstract: The present disclosure belongs to the field of intelligent wearing technology, and discloses an eye tracking apparatus and an eye tracking device, which are designed to improve the problem that the existing eye tracking apparatus based on a pupil-cornea reflection method is susceptible to ambient light interference. The eye tracking apparatus includes a mounting frame, an eye tracking component and a hood, and the mounting frame is configured to be connected with a head-mounted apparatus; the eye tracking component and the hood are disposed on the mounting frame, and the hood is capable of providing an enclosure between the mounting frame and a face of a user. The eye tracking device includes a head-mounted apparatus and the above eye tracking apparatus. The eye tracking apparatus and the eye tracking device of the present disclosure are used for achieving eye tracking.

Abstract: An eye tracking module for video glasses includes: at least two infrared light sources, at least one image sensor assembly, an infrared light filter component and a tracking module housing; fixing members are provided on the tracking module housing, and include an infrared light source fixing member, an image sensor assembly fixing member and a connector; the infrared light source fixing member and the image sensor assembly fixing member are in detachably fixed connection or non-detachably fixed connection with the tracking module housing; and the connector is in detachably fixed connection with the tracking module housing. The eye tracking module has the advantages of simple structure, small occupied space, high eye tracking precision, and flexibility and convenience in use.

Abstract: An eye tracking module for video glasses includes: at least two infrared light sources (1), at least one image sensor assembly (2), an infrared light filter component (11) and a tracking module housing (6); fixing members are provided on the tracking module housing (6), and include an infrared light source fixing member (6-1), an image sensor assembly fixing member (6-2) and a connector (6-4); the infrared light source fixing member (6-1) and the image sensor assembly fixing member (6-2) are in detachably fixed connection or non-detachably fixed connection with the tracking module housing (6); and the connector (6-4) is in detachably fixed connection with the tracking module housing (6). The eye tracking module has the advantages of simple structure, small occupied space, high eye tracking precision, and flexibility and convenience in use.

Abstract: This invention is a system and method for allowing a purchaser to make attempts for charge exemption when buying merchandise or services via a shopping platform over a communication network so they do not have to commit to paying the full price of the selected merchandise or service. A purchaser selects a certain merchandise or service at a client system. The client system transmits information about the selection to a server system. The server system computes whether the charge exemption is approved. The purchaser is allowed to continue making attempts until either he/she is approved or he/she uses up the allowed number of attempts. However, even if the purchaser does not win, he/she is allowed to pay the full price and purchase the item. If any of the purchaser's attempts are successful, or if the purchaser chooses to pay the full price of the item, the item is purchased.

Abstract: A safe medical needle apparatus, including a needle duct having a needle head, a needle seat, in which the needle tail is installed; a safe protecting shell and a biasing part through which the needle duct can pass; A protuberant stop portion, which is provided on the outer surface of the needle duct near the needle head, and the maximum size of cross section thereof is larger than the outer diameter of the remainder of the needle duct; the safe protecting shell there inside includes sequentially a biasing part cavity near the outlet, a protecting cavity, the across section of which is smaller than the biasing part cavity, a stop portion of the protecting shell and a needle seat cavity near the inlet of the needle duct and matching the needle seat; the size of the stop portion of the protecting shell is smaller than the maximum size of the stop portion of the needle duct, making the needle duct be movable therein but the stop portion of the needle duct be locked thereby, wherein a side of the biasing part cav

Abstract: A safe medical needle apparatus, including a needle duct having a needle head, a needle seat, in which the needle tail is installed; a safe protecting shell and a biasing part through which the needle duct can pass; A protuberant stop portion, which is provided on the outer surface of the needle duct near the needle head, and the maximum size of cross section thereof is larger than the outer diameter of the remainder of the needle duct; the safe protecting shell there inside includes sequentially a biasing part cavity near the outlet, a protecting cavity, the across section of which is smaller than the biasing part cavity, a stop portion of the protecting shell and a needle seat cavity near the inlet of the needle duct and matching the needle seat; the size of the stop portion of the protecting shell is smaller than the maximum size of the stop portion of the needle duct, making the needle duct be movable therein but the stop portion of the needle duct be locked thereby, wherein a side of the biasing part cav