Abstract: Ligustrazine aromatic acid ether derivative of general formula I, its preparation method, pharmaceutical composition and application, wherein Ar is selected from aryl substituted aryl and substituted styryl, R is selected from hydrogen and alkyl with no more than 6 carbon atoms.

Abstract: A method and apparatus for improving power performance of a wireless adapter which adopts a time slicing scheme by dividing a beacon interval into multiple slices, and assigning these slices to the stations through the beacon frame. The stations wakeup at the appointed slices to receive their buffered frames from an access point, and may enter into sleep state once the transactions conclude. A further embodiment including formatting data into a control frame for use in a wireless local area network, the frame including an indication, for each station associated with the wireless local area network, whether frames are buffered awaiting transmission to each respective station, a number of time intervals between control frames, and at which time interval the transmission of the buffered frames will begin for each station having buffered frames awaiting transmission.

Abstract: A stacked electrical connector includes an upper mating port, a lower mating port, an insulative separate portion separating the upper and the lower mating ports, and an additional metal shell covering the separate portion. The upper and lower mating ports include first and second metal shells, respectively. The additional metal shell includes a main body shielding a front surface of the separate portion and a pair of side walls extending backwardly from the main body to abut against the opposite walls. At least one side wall includes a lower bending portion attached to the second metal shell in order to form a much larger grounding area for Electromagnetic Interference (EMI) protection.

Abstract: An electrical connector comprises an insulative housing having a base portion, a tongue portion extending forwardly from the base portion, the tongue portion being thinner than the base portion; a metal shell attached to the base portion to enclose the tongue portion to define a receiving room therebetween; a plurality of contacts including a plurality of first contacts and a plurality of second contacts, the first contacts each defining a first contacting arm and a first soldering leg, the second contacts each defining a second contacting arm and a second soldering leg; and wherein the first soldering legs and the second soldering legs are arranged in one row, the contacts at least include a first pair of differential contacts adjacent to each other, a second pair of differential contacts adjacent to each other, a pair of ground contacts adjacent to each other and positioned between the first pair of differential contacts and the second pair of differential contacts.

Abstract: A Passive Optical Network includes: an Optical Line Terminal, an Optical Distribution Network, and an Optical Network Unit or an Optical Network Terminal, wherein the Optical Line Terminal is adapted to exchange data with the Optical Network Unit or the Optical Network Terminal by using an optical module via the Optical Distribution Network, and the optical module is an optical module sending data in a continuous mode. Further, a method for data communication based on the Passive Optical Network includes: sending data by using an optical module sending data in a continuous mode; receiving the data by an optical module based on a set optical power threshold of data “0” and a set optical power threshold of data “1”.

Abstract: A system, method, and computer readable medium for avoiding underflow of a caption buffer in a digital video encoding device. The method receives a sequence of digital video frames, and captions that correspond to the digital video frames in the sequence. The method receives first captions in a first caption carriage, and encodes the first captions, and the corresponding digital video frames, in a compressed video format. The method detects a switch from the first caption carriage to a second caption carriage, and stores second captions in the capture buffer, where each second caption is received in the second caption carriage and corresponds to one of the digital video frames in the sequence. The method examines the capture buffer and the second captions to determine whether underflow of the capture buffer is present or absent. When underflow is absent, the method encodes the second captions, and the corresponding digital video frames, in the compressed video format.

Abstract: An electrical connector mounted on a mother PCB includes an insulative tongue portion and a number of contacts held in the insulative tongue portion. The contacts have four conductive contacts and at least one pair of differential contacts for transferring high speed signals. The conductive contacts are adapted for USB 2.0 protocol. The contacts include a plurality of first and second tail portions to be arranged in a single row or at least two rows.

Abstract: An upright electrical connector for mounting on a PCB includes a bas portion, a first and second mating plate retained in the base portion, a number of first and second contacts held in the first and second mating plate, respectively, an inner shield mounted to the base portion to shield the first and second contacts and an outer shield mounted to the base portion to enclose the inner shield therein. The first and second mating plate includes a first and second tongue portion. The first and second contacts are supported in an inner surface of the first and second tongue portion. An arrangement of the first and a second tongue portions, the first and a second contacts, the inner shield and the outer shield are arranged to configured to a standard IEEE 1394B interface. The first and second tongue portion are perpendicular to the PCB.

Abstract: An electrical connector (100) defining an inserting port (10) for connecting a corresponding plug, includes a first contact module and a second contact module fixed with each other. The first contact module includes a first housing (1) and a number of first contacts (31) insert molded in the first housing (1). The first housing (1) has a tongue (12) extending into the inserting port (10). Each first contact (31) has a first contact portion (311) extending to a free end of the tongue (12). The second contact module includes a second housing (2) and a number of second contacts (32) insert molded in the second housing (2). Each second contact (32) has a second contact portion (321) extending out of the second housing (2). The second contact portions (321) extend to the tongue and offsetting with the first contact portion (311) along a length direction of the tongue (12).

Abstract: A method and apparatus are described for gaining access to a communication medium in a contention-based network, including determining a slot count based on a number of stations in the contention-based network, adjusting the slot count, initiating a frame transmission when the slot count reaches a predetermined value and wherein said number of stations and an address queue are adjusted to reflect a priority. Further, a method and apparatus are described for gaining access to a communication medium in a contention-based network, including receiving a slot count based on a number of stations in the contention-based network, adjusting the slot count, initiating a frame transmission when the slot count reaches a predetermined value and wherein said number of stations and an address queue are adjusted to reflect a priority.

Abstract: A method and apparatus are described for gaining access to a communication medium in a contention-based network, including determining a slot count based on a number of stations in the contention-based network, adjusting the slot count, initiating a frame transmission when the slot count reaches a predetermined value and wherein said number of stations and an address queue are adjusted to reflect one of a priority and traffic patterns. Further, a method and apparatus are described for gaining access to a communication medium in a contention-based network, including receiving a slot count based on a number of stations in the contention-based network, adjusting the slot count, initiating a frame transmission when the slot count reaches a predetermined value and wherein said number of stations and an address queue are adjusted to reflect a priority.

Abstract: Methods and apparatus for transparently switching a local instance of a UMTS protocol-based call from a first card or module of a media gateway to a second card or module of the media gateway, such that the remote end of the call is not aware that the call has been switched between the first and second cards or modules. Moreover, initially establishing call media flow may include implementing two timers of different duration during which call-initialization is retried if no Positive-Acknowledgement of call initialization is received, where a shorter-duration timer is relied upon to attempt retries if a Negative-Acknowledgement is received, and a longer-duration timer is relied upon to attempt retries if neither a Positive-Acknowledgement nor a Negative-Acknowledgement is received.

Abstract: Caption data incorporated in an input coded bit stream conveying a video service is processed by recovering the caption data from the input coded bit stream, decoding the input coded bit stream to form a digital video signal composed of a sequence of frames, embedding the caption data in an ancillary data space of the digital video signal, and encoding the digital video signal to produce an output coded bit stream incorporating the caption data.

Abstract: An electrical connector to be mounted on an outer printed circuit board, includes a receiving cavity to accommodate a mating plug and an insulative housing having a lower cover which is provided with a rear base portion. An inner printed circuit board is mounted onto the base portion and extending into the receiving cavity, and including a number of first contacting pads on a front side thereof to be exposed to the receiving cavity and a number of second contacting pads electrically connected to the first contacting pads respectively, the second contacting pads is to be electrically connected to the outer printed circuit board. A number of contacts are mounted to the second contacting pads respectively and to be mounted the outer printed circuit board. A metal shell is mounted onto the housing to enclose the insulative housing and the inner printed circuit board to form the receiving cavity, the metal shell is spaced apart from the inner printed circuit board.

Abstract: An electrical connector (100) includes an insulative housing (1), a plurality of contacts (2) retained in the insulative housing (1) and a metal shell (3). The insulative housing (1) has a base portion (111). The base portion (111) has a front face (112), a top face (113) and a mounting face (114) opposite to the top face (113). The insulative housing (1) has a tongue (115) extending forwardly from the front face (112). The tongue (115) has a left face (1151) and a right face (1152). The metal shell (3) comprises a left wall (34) and a right wall (35). Each contact (2) has a contact portion (211, 221) extending to the left face (1151) of the tongue (115). The space between the left face (1151) and the left wall (34) is larger than that between the right face (1152) and the right wall (35).

Abstract: An electrical connector (100) includes an insulative housing (10) which includes a first housing (11) and a second housing (12) engaging with each other, a number of first contacts (2) insert molded in the first housing (11), and a number of second contacts (3) retained in the second housing (12). The first housing (11) has a body portion (13) and a tongue (14) extending from the body portion (13). Each first contact (2) has a first contact portion (22) extending to the tongue (14) and a first soldering portion (23) extending out of the first housing (11). Each second contact (3) has a second securing portion (31) retained on the second housing (12), a second contact portion (32) extending to the tongue (14) behind the first contact portions (22), and a second soldering portion (33) extending out of the second housing (12).

Abstract: An electrical connector includes an housing having a base portion, a tongue portion extending forwardly from the base portion and a number of passageways, the tongue portion defining a front face, a first side face and a second side face; a metal shell enclosing the tongue portion to define a receiving room therebetween, and defines a top wall, bottom wall and a pair of side walls, a first receiving room being formed between the bottom wall and the first side face; a number of contacts received in the passageways respectively and including a plurality of first contacts and second contacts, the first contacts each defining a first contacting portion, a first soldering portion and a first retaining portion, the second contacts each defining a second contacting portion, a second soldering portion and a second retaining portion.

Abstract: An electrical connector mounted on a mother PCB includes an insulative tongue portion and a number of contacts held in the insulative tongue portion. The contacts have four conductive contacts and at least one pair of differential contacts for transferring high speed signals. The conductive contacts are adapted for USB 2.0 protocol. The electrical connector further includes a transition module with one end connected to the contacts and the other end to be soldered to the mother PCB.

Abstract: An electrical connector includes an insulative housing having a top face, a pair of side walls, a rear face and a first receiving cavity extending upwardly and through the top face; a contact module including a first tongue portion extending into the first receiving cavity, and a number of first contacts insert molded with the first tongue portion, the first contacts being disposed on a mounting surface of the first tongue portion and exposed to the first receiving cavity, the contact module being attached to the insulative housing; a second receiving cavity into which a second tongue portion extends, the first receiving cavity being essentially narrower than the second receiving cavity communicating with the first receiving cavity, the first and the second tongue portions being parallel to each other; a number of second contacts disposed on opposite first and second surfaces of the second tongue portion, the second contacts being elastic and protruding into the second receiving cavity.

Abstract: An upright electrical connector (100) includes an insulative housing (1) having a base portion (11) defining a mounting face (102), a first and a second tongue portions (312, 322) defining a mating face (101) and extending beyond the base portion; a number of first and second contacts (21, 20) retained in the insulative housing, the first contacts having first contacting portions (212) held in an inner surface of the first tongue portion, the second contacts having second contacting portions (202) held in an inner surface of the second tongue portion; an inner shell (5) mounted to the base portion, the inner shell defining four upwardly-extending side walls (51) enclosing the first and the second tongue portions to form an inner receiving space (53) being open through the mating face; and an outer shell mounted to the base portion, the outer shell comprising four upwardly-extending side walls (61) enclosing the base portion; the first and the second tongue portions are perpendicular to the mounting face.