摘要:
Systems and methods are disclosed for removing nano-particulates from a gas. The systems may include a chamber to contain the particulate-containing gas, a source of the gas, a source of water vapor, a source of a supersonic gas, and at least one ultrasonic transducer in contact with the chamber. The chamber may also include one or more receptacles to receive the particulates. The methods may include introducing the particulate-containing gas and the water vapor into the chamber. A gas may be introduced into the chamber at supersonic speeds thereby cooling the water vapor to form nucleating ice crystals. The ultrasonic transducers may then introduce ultrasonic power into the chamber thereby causing the particulates to contact the ice crystals. The nucleating crystals, with their attached particulates, may then fall under gravity to be captured in the receptacles.
摘要:
An acoustic diode includes a phononic crystal medium, a nonlinear acoustic medium, a aluminum tubes contain the phononic crystal medium and the nonlinear acoustic medium. The phononic crystal medium is fabricated by alternately laminating a water layers and a glass layers in a periodic manner.
摘要:
Some embodiments include a method for providing roaming service for a wireless device of a person that is both a prepaid subscriber of a local network and a subscriber of a home network with which the local network has a roaming agreement. Other embodiments of related systems and methods are also disclosed.
摘要:
An acoustic diode includes a phononic crystal medium, a nonlinear acoustic medium, a aluminum tubes contain the phononic crystal medium and the nonlinear acoustic medium. The phononic crystal medium is fabricated by alternately laminating a water layers and a glass layers in a periodic manner.
摘要:
The present invention discloses a system and a method for state management based on an instant messaging platform. The system comprises a client, a registration application server, a PS application server, and at least one third party server. The method includes the third party server searching its database according to client login information, obtaining the group information of the client and member information of the group, and returning the group information and the member information of the group to the client; then the client sending its current state and group information to the PS application server; and the PS application server, after receiving the current state and group information, sending states of other on-line members in the group to the client, and forwarding the current state of the client to other on-line members in the group. The present invention separates user management from state management in the instant messaging; its PS application server only performs state management; group and user information are stored specifically in other third party server(s), thereby not only decreasing the load of other parts of the system but also reducing the network overhead for realizing smooth operation.
摘要:
A repair apparatus for a circuit board assembly includes a cooling device for a surface of the circuit board assembly opposite to the surface to be repaired. The cooling device defines a chamber for receiving the circuit board assembly. The circuit board assembly is disposed within the chamber to define a heat exchange space between the circuit board assembly and the bottom of the chamber. A method for repairing a circuit board assembly is also provided.
摘要:
A solder paste mixer includes a housing, a vibration mechanism, a rotating mechanism, and a fixture for fixing a solder paste jar. The housing defines a receiving space, and the vibration mechanism and the rotating mechanism are retained within the receiving space. The fixture can be vibrated by the vibration mechanism and rotated by the rotating mechanism.
摘要:
A repair apparatus for a circuit board assembly includes a cooling device for a surface of the circuit board assembly opposite to the surface to be repaired. The cooling device defines a chamber for receiving the circuit board assembly. The circuit board assembly is disposed within the chamber to define a heat exchange space between the circuit board assembly and the bottom of the chamber. A method for repairing a circuit board assembly is also provided.
摘要:
The invention provides a method of loading balance that is based on BS structure, it includes the following steps: using a 4-layers switch to distribute the application request for the proxy server; using the so-called proxy server to distribute application request for application server; and establishing the corresponding WEBLOGIC clusters in accordance with each application request. This invention provides method of loading balance that is based on BS structure that is rationally configure the connection between 4-layers switch and the proxy layer of proxy server; at the same time, maintains the loading balance of the application server and eliminates the single-spot fault by utilizing the advantages of the WEBLOGIC clusters server communication and the back-up synchronization of the users' calling back.
摘要:
A transmission mechanism with a differential mechanism is provided for an automotive vehicle to drive four wheels instead of those with two differential mechanisms disposed on the front axle and rear axle in the prior art. The transmission mechanism is of a compact structure and a relatively less cost of manufacturing, and makes a clearance between the chassis of the automotive vehicle and the ground increased. The performance of the automotive vehicle equipped with the transmission mechanism can be improved.