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Dongming
Dongming Hu, Knoxville, TN US
| Patent application number | Description | Published |
|---|---|---|
| 20090094180 | METHOD OF REAL-TIME CRYSTAL PEAK TRACKING FOR POSITRON EMISSION TOMOGRAPHY (PET) AVALANCHE-PHOTODIODES (APD) DETECTOR - The present invention provides a method of real-time crystal peak tracking for avalanche-photodiode (APD) detectors on positron emission tomography (PET) scanners that satisfies the need to compensate for the significant gain drifting due to thermal variations in APD detectors on PET scanners. | 04-09-2009 |
| 20100065723 | Real-Time Gain Compensation for Photo Detectors Based on Energy Peak Detection - A method, process and apparatus for compensating for changes to the gain of photo detectors in a nuclear imaging apparatus is disclosed. Specifically, embodiments detect positron annihilation event pulses using photo detectors. Changes to the gain of the photo detectors are compensated for by determining the relationship of a detected event pulse peak with a target event pulse peak. Based on the difference between these two peaks, a corrected gain is determined in a closed-loop control system. The corrected gain can be used to compensate for temperature changes that can affect the gain of the photo detectors. | 03-18-2010 |
Dongming Li, Shenzhen CN
| Patent application number | Description | Published |
|---|---|---|
| 20090190934 | FIBER COMMUNICATION SYSTEM, FIBER AMPLIFIER, AND METHOD FOR FABRICATING FIBER AMPLIFIER - The present invention discloses a fiber amplifier, a fabricating method thereof, and a fiber communication system. The fiber amplifier includes at least a pump laser, at least a gain medium and at least an integrated optical component. The integrated optical component includes multiple optical input/output ports, and the optical input/output ports are connected to the pump laser or gain medium directly or indirectly. The present invention may better address problems of unstable performance and difficulty in reducing the size of components in the prior art where fiber amplifiers are formed by a number of discrete components with many fiber fusion splices. In addition, the present invention may reduce the production complexity and costs of fiber amplifiers, and improve the productivity of fiber amplifiers. | 07-30-2009 |
| 20100296476 | NETWORK SWITCHING METHOD, DEVICE AND SYSTEM FOR MOBILE MULTIMEDIA SERVICES - A network switching method, device and system for mobile multimedia services are provided. The method includes: detecting signal strength of media stream data of a first network, and when the signal strength of the media stream data of the first network is smaller than a first preset value, receiving media stream data of a second network in parallel; and buffering the media stream data of the second network, decoding the buffered media stream data of the second network, and playing the decoded media stream data of the second network. The device includes a first communication module, a detecting module, a switching module, a second communication module, a processing module and a playing module. The system includes a first network, a second network and a terminal. Through the method, device and system, the time delay in the process of switching the serving network is reduced, and the service interruption caused by the network switching when the terminal performs multimedia services is prevented. | 11-25-2010 |
Dongming Zhu, Guangdon Province CN
| Patent application number | Description | Published |
|---|---|---|
| 20090252149 | METHOD FOR PROCESSING BEARER CONTROL - A method for bearer control includes: a first control entity routes a call which is routed from a TDM bearer based network domain or originated by an intra-office POTS subscriber, into an IP bearer based network domain; a second control entity receives the call which is routed back from said IP bearer based network domain and is destined to the TDM bearer based network domain or the intra-office POTS subscriber; when it's determined that a media stream that enters into and exits from said IP bearer based network domain is exchanged on the same media gateway, the first and the second control entities perform a media negotiation during the SIP session to select a same media codec type as the one used on TDM circuits or subscriber lines at two sides, and control a corresponding media gateway to transmit the media stream according to said selected media codec type. | 10-08-2009 |