Abstract: A method implemented by a server includes: sending a link short message (LSM) to a terminal; generating a communication token (C token) based on a link request of the terminal, and determining whether the server has stored another identical C token; when negative, storing the C token, and sending web data and the C token to the terminal; when affirmative, further determining whether a web cookie in the link request contains a browsing token identical to the C token; when affirmative, sending the web data to the terminal; and when negative, sending a verification short message (VSM) to the terminal, and sending the web data to the terminal upon receiving a verification request within a predetermined duration since sending the VSM.

Abstract: A method for establishing communication includes: in receipt of identification information associated with an outside party from an inside party, transmitting, by a closed server, link information to an outside party device associated with the outside party via a public server; in receipt of a request from the outside party device executing an instant messaging application, transmitting, by the public server, an identifier associated with a communication group to the outside party device; and in receipt of the identifier, adding, by the closed server, the outside party to the communication group and enabling the outside party to communicate exclusively with the inside party via an instant messaging service.

Abstract: A method for establishing communication includes: in receipt of identification information associated with an outside party from an inside party, transmitting, by a closed server, link information to an outside party device associated with the outside party via a public server; in receipt of a request from the outside party device executing an instant messaging application, transmitting, by the public server, an identifier associated with a communication group to the outside party device; and in receipt of the identifier, adding, by the closed server, the outside party to the communication group and enabling the outside party to communicate exclusively with the inside party via an instant messaging service.

Abstract: A built-in module for an inverter and having tension control with integrated tension and velocity closed loops, where required tension feedbacks can be obtained by internal calculations of the inverter or feedback signals of a tension sensor. The tension control module is applied to provide a tension control for a winding mechanism which is operated by driving at least one motor. The tension control module firstly builds a tension control to provide a balanced tension to the winding mechanism. Afterward, the tension control module builds a velocity control to provide an accelerated or decelerated adjustment for the winding mechanism. Accordingly, the winding mechanism can stably maintain a tension-balanced operation.

Abstract: A built-in module for an inverter and having tension control with integrated tension and velocity closed loops, where required tension feedbacks can be obtained by internal calculations of the inverter or feedback signals of a tension sensor. The tension control module is applied to provide a tension control for a winding mechanism which is operated by driving at least one motor. The tension control module firstly builds a tension control to provide a balanced tension to the winding mechanism. Afterward, the tension control module builds a velocity control to provide an accelerated or decelerated adjustment for the winding mechanism. Accordingly, the winding mechanism can stably maintain a tension-balanced operation.