Abstract: A video surveillance method, a surveillance server, and a surveillance system where the video surveillance method includes receiving a surveillance request sent by a client, where the surveillance request carries an identifier of a video acquiring apparatus, acquiring a real-time video from the video acquiring apparatus, acquiring real-time video superimposition information which includes an superimposition position, real-time presentation information of an agent, and agent management information, superimposing the real-time presentation information to the real-time video according to the superimposition position and superimposing the agent management information to the real-time video according to the superimposition position and in a form of an operation menu in order to generate an interactive video, and sending the interactive video to the client such that a user performs control on a call of the agent or performs setting on a status of the agent using the operation menu.

Abstract: A wind power electricity generating system and its generation method, comprising a circuit frame, towers that support the circuit frame, a plurality of rails attached to the circuit frame, a plurality of interconnected trolleys, each trolley is connected with a blade whose blade rotation angle is adjustable, a plurality of generators, a plurality of positioning devices capable of sending and receiving signals deployed on the circuit frame, and devices for sending and receiving signals for adjusting a rotation angle of the blades being deployed at each trolley. Current collectors are deployed at the trolley.

Abstract: A wind power electricity generating system and its generation method, comprising a circuit frame, towers that support the circuit frame, a plurality of rails attached to the circuit frame, a plurality of interconnected trolleys, each trolley is connected with a blade whose blade rotation angle is adjustable, a plurality of generators, a plurality of positioning devices capable of sending and receiving signals deployed on the circuit frame, and a wireless servo signal transmission device capable of sending and receiving signals is deployed at each trolley. Current collectors are deployed at the trolley.

Abstract: A connection recovery method includes searching, by a first terminal, for a recovery candidate corresponding to an interrupted connection; selecting, by the first terminal, one found recovery candidate as a first recovery candidate; sending, by the first terminal, a negotiation request to a second terminal; receiving, by the first terminal, a matching success message returned by the second terminal; and transmitting, by the first terminal, data to the second terminal according to the first connection information.

Abstract: A wind power electricity generating system and its generation method, comprising a circuit frame, towers that support the circuit frame, a plurality of rails attached to the circuit frame, a plurality of interconnected trolleys, each trolley is connected with a blade whose blade rotation angle is adjustable, a plurality of generators, a plurality of positioning devices capable of sending and receiving signals deployed on the circuit frame, and a wireless servo signal transmission device capable of sending and receiving signals is deployed at each trolley. Current collectors are deployed at the trolley.

Abstract: A wind power electricity generating system and its generation method, comprising a circuit frame, towers that support the circuit frame, a plurality of rails attached to the circuit frame, a plurality of interconnected trolleys, each trolley is connected with a blade whose blade rotation angle is adjustable, a plurality of generators, a plurality of positioning devices capable of sending and receiving signals deployed on the circuit frame, and devices for sending and receiving signals for adjusting a rotation angle of the blades being deployed at each trolley. Current collectors are deployed at the trolley.

Abstract: Vertical axis wind turbine and a blade rotation angle regulating and braking device for the turbine, with one end of the radial arms of the turbine being connected with the main shaft, and a blade rotation angle regulator and braking device is deployed at the other end of the radial arms. The blade rotation angle regulating and braking device comprising a base, a blade arm, a pivot shaft, a blade rotation angle driving device, and a blade braking device. The blade is connected to the radial arm through the blade arm, the length axis of the blade is parallel to the main shaft. The present invention meets the demands for driving the blade to rotate in lower wind speeds, fixing the blade angle in higher wind speeds, and making the wind rotor more efficient.

Abstract: Embodiments of the present invention relate to a method, an apparatus and a system for transmitting a media stream. The method is executed by an access terminal, includes: establishing a real-time collaboration channel between the access terminal and a network computer; sending through a first VDI channel to the network computer an operation instruction input by a user; receiving a real-time collaboration message that is sent through the real-time collaboration channel by the network computer; performing, through the network computer, media negotiation with a communication device, so as to determine a media attribute parameter that is used to transmit a media stream between the access terminal and the communication device; and transmitting, by the access terminal, a media stream mutually with the communication device according to the media attribute parameter determined through the media negotiation.

Abstract: A method, an apparatus, and a system for implementing private network traversal are disclosed, where a message exchanged between a TURN server in a public network and a communications terminal in a local area network is transmitted through a pre-established websocket connection. The method includes: receiving, by the TURN server, a resource allocate request sent by the communications terminal, allocating a relay address and a resource port for the communications terminal; receiving a TURN data packet sent by the communications terminal, where the TURN data packet includes communication data and a multiplexing identifier, and sending the communication data to the remote node through the communications channel identified by the multiplexing identifier, thereby solving a problem in an existing TURN technology that in case that a firewall only opening an HTTP port is deployed, communication between a communications terminal in a local area network and a remote node cannot be implemented.

Abstract: An exemplary heat sink includes a plurality of fins interconnected together. Each of the fins includes a main body and at least an engaging portion extending outwardly from the main body. The engaging portions of every two adjacent fins are interlocked with each other. The engaging portion includes a base extending outwardly from the main body, an engaging groove defined at a lateral side of the base, and an inserting rib protruding outwardly from another lateral side of the base opposite to the engaging groove. In the two adjacent fins, the inserting rib of the engaging portion of one fin is fitly inserted into the engaging groove of the engaging portion of another fin.

Abstract: A method, an apparatus, and a system for implementing private network traversal are disclosed, where a message exchanged between a TURN server in a public network and a communications terminal in a local area network is transmitted through a pre-established websocket connection. The method includes: receiving, by the TURN server, a resource allocate request sent by the communications terminal, allocating a relay address and a resource port for the communications terminal; receiving a TURN data packet sent by the communications terminal, where the TURN data packet includes communication data and a multiplexing identifier, and sending the communication data to the remote node through the communications channel identified by the multiplexing identifier, thereby solving a problem in an existing TURN technology that in case that a firewall only opening an HTTP port is deployed, communication between a communications terminal in a local area network and a remote node cannot be implemented.

Abstract: A support for a large vertical axis wind turbine including a tower frame, a platform, a vertical central axis, and a vertical axis windmill including a plurality of blades and supporting arms. The platform is disposed on the tower frame for installing and fixing a generator. The vertical central axis and the vertical axis windmill are supported by the tower frame. The tower frame is a truss structure and includes at least three sub-tower frames which are in parallel with each other and form a regular polygon from top view. The sub-tower frames are hollow tubes. The ratio of a diameter of the vertical axis windmill to a distance between two adjacent sub-tower frames is between 2.5 and 6. The ratio of the diameter of the vertical axis windmill to a height of the tower frame is between 3 and 0.5.

Abstract: The invention relates to a vertical axis wind turbine, and in particular to an apparatus and method for transporting the vertical axis wind turbine. The method for transporting the vertical axis wind turbine, including the steps of: employing an apparatus to be a box or frame; situating a generator horizontally in the apparatus; fixing an upper flange and lower flange to a vertical shaft; fixing the base of the generator on the corresponding surface of the apparatus through holes at the base of the generator; and supporting the other end of the vertical shaft by a supporting object.

Abstract: A heat dissipation device includes a first heat sink and a second heat sink. The first heat sink includes a first heat spreader and a plurality of fins. The first heat spreader includes a receiving structure having a first tooth and two second teeth. The first tooth is located between the second teeth to define two first grooves between the first tooth and the second teeth. The second heat sink includes a second heat spreader and a plurality of fins. The second heat spreader includes a protruding structure having two first inserting portions. When the second heat sink is assembled to the first heat sink, the each of the first inserting portions is inserted in the first groove of the first heat spreader and deformed to be firmly engaged in the first groove and clasped by the first tooth.

Abstract: A wind mill structure of a lift-type vertical axis wind turbine. The lift-type vertical axis wind turbine includes a vertical shaft and the wind mill includes a plurality of blades and supporting arms. The supporting arms hold the blades, and the blades are connected to the vertical shaft via the supporting arms. A setting angle, formed by a chord of the blades and a tangent line that goes through the center of the blades, ranges from ?12° to 12°. An angle, formed by the chord of the blade and the rotatable supporting arm, ranges from 7° to 100°. The wind mill can maintain relatively stable rotation speeds under wind speeds exceeding the rated wind speed by adjusting the angle of the supporting arms, thereby ensuring stable output from the vertical axis wind turbine.

Abstract: A heat dissipation device includes a first heat sink and a second heat sink connected to each other. Each of the first and second heat sinks includes a base and a plurality of fins extending from the base. The base of the first heat sink forms a rib on a lateral face thereof, and the base of the second heat sink defines a groove in a lateral face thereof. The rib is received in the groove to connect the first heat sink with the second heat sink.

Abstract: A vertical axis wind turbine including: a vertical axis wind mill having a vertical shaft and a generator having a generator rotor shaft, wherein the vertical shaft of the wind mill share the same shaft with the generator rotor shaft. This arrangement simplifies the structure and increases the stability, reliability, and service lifetime of vertical axis wind turbines by making on-site assembly easy and cutting the on-site workload and cost, without undermining the wind resistance capability and safety prompting wider application of vertical axis wind turbines.

Abstract: A vertical axis wind turbine comprising: a plurality of support arms (2) connected with a vertical axis (1), a wind rotor comprising a plurality of blades (3) connected to the blade support arms (2), the wind rotor having a rotation radius and the blades (3) having a chord length; wherein an airfoil of the blade is an asymmetrical camber airfoil, the convex surface (31) of the blade (3) faces vertical axis (1), and a ratio of the rotation radius of the wind rotor (R) to the chord length of the blade (L) is between about 1.8 and about 4.

Abstract: A blade support limb structure of a vertical axis wind power generator includes a fixed support limb (1) and a rotatable support limb (2), one end (21) of the rotatable support limb is connected with one end (22) of the fixed support limb and the rotatable support limb may rotate around it. The structure keeps a wind wheel at stable rotation speed in the case the environmental wind speed exceeds the rated wind speed, thereby to ensure that vertical axis wind power generator outputs constant power. The structure solves a problem of constant power output of the vertical axis wind power generator from hundreds watts to thousands watts, so its applications are wide.

Abstract: A wind mill structure of a lift-type vertical axis wind turbine. The lift-type vertical axis wind turbine includes a vertical shaft and the wind mill includes a plurality of blades and supporting arms. The supporting arms hold the blades, and the blades are connected to the vertical shaft via the supporting arms. A setting angle, formed by a chord of the blades and a tangent line that goes through the center of the blades, ranges from ?12° to 12°. An angle, formed by the chord of the blade and the rotatable supporting arm, ranges from 7° to 100°. The wind mill can maintain relatively stable rotation speeds under wind speeds exceeding the rated wind speed by adjusting the angle of the supporting arms, thereby ensuring stable output from the vertical axis wind turbine.