Abstract: A computer enclosure includes a rear plate. The rear plate defines a plurality of ventilation holes therein. A first rib, a second rib and a third rib is located on the rear plate. The first rib surrounds the ventilation holes. The third rib surrounds the first and second ribs.

Abstract: The present invention relates to a method and device for estimating a timing error and a frequency offset in the MIMO mobile communication system. In a system including a plurality of transmit antennas and a plurality of receive antennas, a predetermined preamble symbol is inserted into a frame to be transmitted by a transmitting device, and pseudo noise is multiplied to the preamble symbol, and result signal is transmitted through each transmit antenna. A receiving device receives the signal through each receive antenna, extracts a preamble symbol from the OFDM symbol, and multiplies local pseudo noise that corresponds to the pseudo noise used by the transmitting device and is shifted by the extracted preamble symbol. A timing error is estimated and compensated according to the correlation of the pseudo noise of the transmitting device and the local pseudo noise of the receiving device. A frequency offset is estimated and compensated according to the phase difference between the preamble symbols.

Abstract: Embodiments of the present invention disclose a method of key switching for decrypting service data at a terminal, which includes: storing at least two decryption keys at a terminal side for decrypting service data encrypted by network side using a corresponding encryption key, wherein one of the at least two decryption keys is a current decryption key; receiving current service data and using the stored keys to decrypt the service data; and selecting from the stored decryption keys a key with which the current service data can be successfully decrypted and taking the selected key as the current decryption key. The embodiments of the present invention further disclose a data decryption device and a terminal equipment with the corresponding decryption function. With the invention, key switching can be performed adaptively, without special requirements on key distribution mode and synchronization, or additional overhead for supporting a strict data frame synchronization mechanism.

Abstract: The present invention discloses a full reservoir sampling and testing apparatus having a ground surface testing and controlling tool (36) and a downhole tool (1), the downhole tool (1) comprises a wireline bridle (21), an adapter joint AH64 (2) connected to the wireline bridle (21), a GR pup joint, an electric unit (4), a single probe unit (5), a pumping unit (6), a dual packer unit (7), and a multi sampling unit (8); the ground surface testing and controlling tool (36) comprises a power supply controller, a computer system and a relevant control, analysis and interpretation software; an upper portion of the pumping unit (6) is connected to the single probe unit (5) and a lower portion thereof is connected to the multi sampling unit (8).

Abstract: A method for fabricating a laser diode comprising providing a laser diode epitaxial structure and depositing a metal layer stack on the epitaxial structure, the stack comprising a contact and sacrificial layer. A ridge is formed in the laser diode epitaxial structure, the stack being the mask forming the ridge. An insulting layer is deposited over the ridge and at least a portion of the sacrificial layer is removed. At least a portion of the insulating thin film at the top of the stack is also removed. A pad metal is deposited in electrical contact with the contact and the pad metal is insulated from the ridge and laser diode epitaxial structures by the insulting layer. A laser diode fabricated using the method comprises a laser diode epitaxial structure having a ridge with mesas on the sides of the ridge. A p-contact is on the ridge, and an insulating layer covers the exposed surfaces of the ridge, and at least a portion of the mesas.

Abstract: The present invention relates to a method for estimating a timing error and a frequency offset in a high-speed portable Internet system and a method thereof. A predetermined preamble symbol is added to an OFDM frame to be transmitted by a transmitter according to an exemplary embodiment of the present invention, an IFFT operation is performed, and then a pseudo noise is multiplexed by the preamble symbol to estimate the timing error and the frequency offset. A receiver receives an OFDM symbol, extracts the preamble symbol from the OFDM symbol, and multiplexes the extracted preamble symbol by a local pseudo noise, which is equal to the pseudo noise used by the transmitter but is shifted.

Abstract: The present invention relates to a method and device for estimating a timing error and a frequency offset in the MIMO mobile communication system. In a system including a plurality of transmit antennas and a plurality of receive antennas, a predetermined preamble symbol is inserted into a frame to be transmitted by a transmitting device, and pseudo noise is multiplied to the preamble symbol, and result signal is transmitted through each transmit antenna. A receiving device receives the signal through each receive antenna, extracts a preamble symbol from the OFDM symbol, and multiplies local pseudo noise that corresponds to the pseudo noise used by the transmitting device and is shifted by the extracted preamble symbol. A timing error is estimated and compensated according to the correlation of the pseudo noise of the transmitting device and the local pseudo noise of the receiving device. A frequency offset is estimated and compensated according to the phase difference between the preamble symbols.

Abstract: An ICI cancellation iterative receiver and an ICI cancellation method in the wireless communication system is provided. In order to eliminate the Inter-carrier-interference (ICI) due to phase noise, an adaptive ICI cancellation scheme based on the wireless communication system is presented. In order to correct the contaminated preamble symbols due to phase noise, a first LMS adaptive filter in the receiver cancels the ICI. In the following data symbols of a frame, joint of the turbo decoder and channel estimation is provided. The complexity of the joint algorithm is analyzed and the algorithm can be implemented in the wireless communication system. The simulation results show that the performance can be improved dramatically.

Abstract: To integrate a parent application and a child application, the parent application receives events through a user interface. If the events are to be processed by the child application, they are propagated to the child application. The child application generates content data based on the received events, writes the content data into a storage module, and then notifies the parent application. The parent application reads out the content data written in the storage module.

Abstract: A wavelength tunable laser comprising a laser diode and a closed external cavity formed by one or more optical resonators either horizontally or vertically coupled to adjacent waveguides. The optical resonator primarily functions as a wavelength selector and may be in the form of disk, ring or other closed cavity geometries. The emission from one end of the laser diode is coupled into the first waveguide using optical lens or butt-joint method and transferred to the second waveguide through evanescent coupling between the waveguides and optical resonator. A mirror system or high reflection coating at the end of the second waveguide reflects the light backwards into the system resulting in a closed optical cavity. Lasing can be achieved when the optical gain overcomes the optical loss in this closed cavity for a certain resonance wavelength which is tunable by changing the resonance condition of the optical resonator through reversed biased voltage or current injection.

Abstract: A wavelength tunable laser comprising a laser diode and a closed external cavity formed by one or more optical resonators either horizontally or vertically coupled to adjacent waveguides. The optical resonator primarily functions as a wavelength selector and may be in the form of disk, ring or other closed cavity geometries. The emission from one end of the laser diode is coupled into the first waveguide using optical lens or butt-joint method and transferred to the second waveguide through evanescent coupling between the waveguides and optical resonator. A mirror system or high reflection coating at the end of the second waveguide reflects the light backwards into the system resulting in a closed optical cavity. Lasing can be achieved when the optical gain overcomes the optical loss in this closed cavity for a certain resonance wavelength which is tunable by changing the resonance condition of the optical resonator through reversed biased voltage or current injection.

Abstract: The present invention discloses a full reservoir sampling and testing apparatus having a ground surface testing and controlling tool (36) and a downhole tool (1), the downhole tool (1) comprises a wireline bridle (21), an adapter joint AH64 (2) connected to the wireline bridle (21), a GR pup joint, an electric unit (4), a single probe unit (5), a pumping unit (6), a dual packer unit (7), and a multi sampling unit (8); the ground surface testing and controlling tool (36) comprises a power supply controller, a computer system and a relevant control, analysis and interpretation software; an upper portion of the pumping unit (6) is connected to the single probe unit (5) and a lower portion thereof is connected to the multi sampling unit (8).

Abstract: A blend of one or more crosslinked polymers or copolymers prepared from an olefinically unsaturated polymerizable carboxylic or anhydride monomer and at least one high molecular weight essentially linear polymer prepared from an olefinically unsaturated polymerizable carboxylic acid monomer. The blend is neutralized to typically a low pH, and generally contains a noncovalent, e.g. ionic, crosslinking agent, and a cure rate modifier. The hydrogel blend is capable of containing a large amount of water, has good tack, good adhesion, and can be utilized as an application vehicle having a backing thereon as well as containing various substances such as personal care compounds, pharmaceuticals, active ingredients, and the like.

Abstract: A blend of one or more crosslinked polymers or copolymers prepared from an olefinically unsaturated polymerizable carboxylic or anhydride monomer and at least one high molecular weight essentially linear polymer prepared from an olefinically unsaturated polymerizable carboxylic acid monomer. The blend is neutralized to typically a low pH, and generally contains a noncovalent, e.g. ionic, crosslinking agent, and a cure rate modifier. The hydrogel blend is capable of containing a large amount of water, has good tack, good adhesion, and can be utilized as an application vehicle having a backing thereon as well as containing various substances such as personal care compounds, pharmaceuticals, active ingredients, and the like.

Abstract: A blend of one or more crosslinked polymers or copolymers prepared from an olefinically unsaturated polymerizable carboxylic or anhydride monomer and at least one high molecular weight essentially linear polymer prepared from an olefinically unsaturated polymerizable carboxylic acid monomer. The blend is neutralized to typically a low pH, and generally contains a noncovalent, e.g. ionic, crosslinking agent, and a cure rate modifier. The hydrogel blend is capable of containing a large amount of water, has good tack, good adhesion, and can be utilized as an application vehicle having a backing thereon as well as containing various substances such as personal care compounds, pharmaceuticals, active ingredients, and the like.

Abstract: This invention relates to a new synthetic process for the preparation of anti-tumor agent Etoposide (VP16-213). the process, which has shorten reaction route, simple procedure, high yield and low materials cost, therefore facilitates the commercial manufacture of etoposide.