Abstract: A grinding device for raised joints of rivets on sheet metal is provided, including a lateral plate, legs, a moving plate, first springs, a first bearing seat, a sleeve, a grinding wheel, a moving bar, a 7-shaped plate, a vertical bar, a second spring, an oscillating plate, etc. The legs are fixedly connected, in a symmetric manner, to left and right sides of the bottom of the lateral plate. A through hole, which has a function of guiding, is formed on a left side of the lateral plate. The moving bar is located in the through hole. In the present disclosure, a driving motor is started to rotate the grinding wheel, the grinding device is moved to enable the grinding wheel to be located above a raised joint, and then the oscillating plate is pulled so that the grinding wheel can move downward to grind the raised joint.

Abstract: A grinding device for raised joints of rivets on sheet metal is provided, including a lateral plate, legs, a moving plate, first springs, a first bearing seat, a sleeve, a grinding wheel, a moving bar, a 7-shaped plate, a vertical bar, a second spring, an oscillating plate, etc. The legs are fixedly connected, in a symmetric manner, to left and right sides of the bottom of the lateral plate. A through hole, which has a function of guiding, is formed on a left side of the lateral plate. The moving bar is located in the through hole. In the present disclosure, a driving motor is started to rotate the grinding wheel, the grinding device is moved to enable the grinding wheel to be located above a raised joint, and then the oscillating plate is pulled so that the grinding wheel can move downward to grind the raised joint.

Abstract: A method and apparatus for authenticating a user is provided, the method includes: receiving an authentication request sent from a user device by a user; providing basic information in response to the authentication request, wherein the basic information comprises information related to a social networking service used by the user; generating authentication information based on the basic information, wherein the authentication information comprises a question and a corresponding answer; sending the question to the user device and receiving feedback information from the user device; and generating an authentication result by verifying whether the feedback information is consistent with the answer, and sending the authentication result to the user device. The method and apparatus address the issue of forgotten answers to security questions used in user authentication.

Abstract: Disclosed are a method, server, client and system for verifying a verification code. The method includes: sending a verification picture to a client according to a verification request from the client; acquiring from the client voice information that is input by a user according to the verification picture; and processing the voice information and performing verification according to acquired voiceprint information and/or text information. The server includes a sending module, an acquiring module and a verifying module. The client includes a receiving module, an acquiring module and a sending module. The system includes a server and a client. It may be effectively distinguished as whether the verification code is submitted by the user or by others, such that the problem of manual coding is effectively solved, and the operating cost of the server side is reduced and the overhead is saved.

Abstract: Disclosed herein are oral care compositions comprising: a) one or more pyrophosphate compounds, wherein the total concentration of pyrophosphate compounds in the composition is 0.5 wt % to 1.5 wt %, based on the weight of the oral care composition; b) one or more thickening gums, wherein the total concentration of thickening gums in the composition is 1.25 wt % to 1.6 wt %, based on the weight of the oral care composition; and c) a metal ion source.

Abstract: A verification data processing method includes: receiving CAPTCHA response information sent by user through a user terminal and obtaining an IP address of the user terminal from the CAPTCHA response information; obtaining verification data by verifying the CAPTCHA response information, and storing the verification data in a preset hash table, where the verification data includes the type of a CAPTCHA code corresponding to the CAPTCHA response information, and the number of total verifications of CAPTCHA response information and the number of correct verifications both corresponding to the IP address; determining a user type of the user according to the IP address, the number of total verifications and the number of correct verifications; storing the verification data in a min-heap according to the CAPTCHA code type and the user type; and making a statistic of all the numbers of total verifications and all the numbers of correct verifications in the min-heap.

Abstract: An identity authentication method of an internet account, an identity authentication device of an internet account and a system are provided.

Abstract: A verification data processing method includes: receiving CAPTCHA response information sent by user through a user terminal and obtaining an IP address of the user terminal from the CAPTCHA response information; obtaining verification data by verifying the CAPTCHA response information, and storing the verification data in a preset hash table, where the verification data includes the type of a CAPTCHA code corresponding to the CAPTCHA response information, and the number of total verifications of CAPTCHA response information and the number of correct verifications both corresponding to the IP address; determining a user type of the user according to the IP address, the number of total verifications and the number of correct verifications; storing the verification data in a min-heap according to the CAPTCHA code type and the user type; and making a statistic of all the numbers of total verifications and all the numbers of correct verifications in the min-heap.

Abstract: Disclosed are a method, server, client and system for verifying a verification code. The method includes: sending a verification picture to a client according to a verification request from the client; acquiring from the client voice information that is input by a user according to the verification picture; and processing the voice information and performing verification according to acquired voiceprint information and/or text information. The server includes a sending module, an acquiring module and a verifying module. The client includes a receiving module, an acquiring module and a sending module. The system includes a server and a client. It may be effectively distinguished as whether the verification code is submitted by the user or by others, such that the problem of manual coding is effectively solved, and the operating cost of the server side is reduced and the overhead is saved.

Abstract: Disclosed herein are oral care compositions comprising: a) one or more pyrophosphate compounds, wherein the total concentration of pyrophosphate compounds in the composition is 0.5 wt % to 1.5 wt %, based on the weight of the oral care composition; b) one or more thickening gums, wherein the total concentration of thickening gums in the composition is 1.25 wt % to 1.6 wt %, based on the weight of the oral care composition; and c) a metal ion source.

Abstract: A method and apparatus for authenticating a user is provided, the method includes: receiving an authentication request sent from a user device by a user; providing basic information in response to the authentication request, wherein the basic information comprises information related to a social networking service used by the user; generating authentication information based on the basic information, wherein the authentication information comprises a question and a corresponding answer; sending the question to the user device and receiving feedback information from the user device; and generating an authentication result by verifying whether the feedback information is consistent with the answer, and sending the authentication result to the user device. The method and apparatus address the issue of forgotten answers to security questions used in user authentication.

Abstract: An identity authentication method of an internet account, an identity authentication device of an internet account and a system are provided.