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Qiang Gao

Qiang Gao, Shaanxi CN

Patent application numberDescriptionPublished
20110094720SHELL-AND-TUBE HEAT EXCHANGER WITH HELICAL BAFFLES - The present invention provides a single shell-pass shell-and-tube heat exchanger with helical baffles, where within a single pitch, the helical baffles are separated into inner and outer parts along the radial direction of the shell. In the central portion of the inner space of the shell, an inner non-continuous helical form is employed; in other portion outside the central portion, doughnut shaped helical baffles with continuous curved surfaces are arranged to form an outer continuous helical baffle, and the outer helical baffles are arranged to surround the inner helical baffles. Furthermore, the present invention relates to a multiple shell-pass shell-and-tube heat exchanger with helical baffles, in which complete continuous helical baffles are provided in shell-sides other than the inner shell-pass, while non-continuous helical baffles or other flow guide means are employed in the inner shell-pass. The present invention makes flow patterns of fluids on the shell side more desirable, leading to a reduced flow pressure drop, and mitigate fouling, thus the heat transfer rate is improved and the service life of the heat exchanger is increased. The present invention also provides two methods for manufacture of continuous helical baffles, which ensure the concentricity of the tube bundle holes on each continuous helical baffle so as to facilitate installation of heat exchange tube bundles.04-28-2011
20130112411PERFORATOR CHARGE HAVING AN ENERGETIC MATERIAL - A perforator charge includes a case, an explosive inside the case, and a liner to be collapsed by detonation of the explosive to form a perforating jet. The perforator charge also includes an energetic material to be activated in response to the detonation of the explosive.05-09-2013

Patent applications by Qiang Gao, Shaanxi CN

Qiang Gao, Tucson, AZ US

Patent application numberDescriptionPublished
20110084656SYSTEM AND METHOD FOR WIRELESS POWER TRANSFER - A wireless transmission system having a transmitter and receiver is described. In one embodiment, the transmitter includes an electronically-controlled switch controlled by a first pulse width modulation control circuit, the switch configured to pull current through a first inductor when the switch is closed, the first pulse width modulation control circuit outputting a PWM output signal to control the switch. A first feedback signal obtained from a control input of the switch. A second feedback signal obtained from a terminal of the inductor, wherein a control feedback signal is computed, at least in part, as a difference between the first feedback signal and the second feedback signal is provided to the first pulse width modulation control circuit. In one embodiment, the receiver includes a second pulse with modulation controller, the second pulse width modulation controller controlling the receiver switch to deliver a desired power from the receiving coil to a load.04-14-2011

Qiang Gao, San Diego, CA US

Patent application numberDescriptionPublished
20080212599METHODS AND SYSTEMS FOR ENCODING DATA IN A COMMUNICATION NETWORK - Methods and systems for encoding data in a communication network are presented. In an aspect, a method is provided for processing multimedia data. The method includes detecting a smoothness factor associated with one or more portions of the multimedia data, and determining that smoothing is required based on the smoothness factor. The method also includes moving selected multimedia data from a first selected portion of the multimedia data to a second selected portion of the multimedia data, wherein the smoothness factor is adjusted. In an aspect, an apparatus is provided that includes a detector configured to detect a smoothness factor associated with one or more portions of the multimedia data, and to determine that smoothing is required based on the smoothness factor. The apparatus also includes an encoder configured to move selected multimedia data from a first selected portion of the multimedia data to a second selected portion of the multimedia data.09-04-2008
20080270598Methods and Apparatus for Sampling Usage Information From a Pool of Terminals in a Data Network - Methods and apparatus for sampling usage information from a pool of terminals in a data network. In an aspect, a method is provided that includes determining a designated set of terminals, and transmitting tracking parameters to the designated set of terminals, wherein the tracking parameters identify at least one upload window. In an aspect, an apparatus is provided that includes provisioning logic configured to determine one or more tracking parameters that identify at least one upload window, and targeting logic configured to determine a designated set of terminals, and to transmit tracking parameters to the designated set of terminals. In another aspect, a method is provided for performing usage tracking. The method includes receiving tracking parameters that identify at least one upload window, performing usage tracking according to the tracking parameters to produce a tracking log, and transmitting the tracking log during the at least one upload window.10-30-2008
20090016445EARLY RENDERING FOR FAST CHANNEL SWITCHING - The disclosure relates to techniques for switching between channels of digital multimedia content. In particular, a decoding device decodes and renders to a display at least one frame of a segment of data prior to receiving the entire segment. In certain aspects, the decoding device may render one of the frames of the segment and freeze the rendered frame until the decoding device receives all of the frames of the segment. In other aspects, the decoding device may render frames of one or more segments at a reduced rendering rate until the receiving and rendering operations of decoding device are synchronized such that the rendering of the current segment occurs at substantially the same time as the receiving of the next segment. By rendering at least frame prior to receiving the entire segment the decoding device more quickly displays content to a user during a channel switching event.01-15-2009
20090274099METHODS AND APPARATUS FOR COMMUNICATING TRANSMITTER INFORMATION IN A COMMUNICATION NETWORK - Methods and apparatus for communicating transmitter information in a communication network are disclosed. The methods and apparatus communicate transmitter specific information, in particular, which includes location information about network transmitters for use in location or positioning type services. The disclosed methods and apparatus include inserting such transmitter specific information within either a data flow of at least one transmission frame or a control channel in the at least one transmission frame. In addition, a transmitter identifier is encoded in a positioning pilot channel (PPC) within the at least one transmission frame, and the configured transmission frame transmitted to a user device. The user device may use the transmitter specific information of numerous transmitters along with the transmitter identifiers to measure how far it is from the transmitters, and then triangulate to determine position.11-05-2009
20110070820SYSTEM AND APPARATUS FOR POWER-EFFICIENTLY DELIVERING PERSONALIZED CONTENTS IN A BROADCAST NETWORK - Embodiments enable mobile devices to efficiently receive mobile broadcast content corresponding to a user's selections based upon content description metadata transmitted in a content description flow portion of broadcast transmissions. A content description flow may be in the form of broadcast data packets which include information about the nature of content elements to be broadcast. Using the information in the content description flow, a mobile device can determine whether a particular portion of content is of interest, as well as when the content will be broadcast and the content flow address on which it can be received. Enabling mobile devices to screen broadcast content flows by monitoring the content description flow for content of interest can extend their battery life since the content description flow can be quickly downloaded and the receiver de-energized if no content is of interest to the user.03-24-2011
20110165865SYSTEM AND APPARATUS FOR POWER-EFFICIENTLY DELIVERING UPDATE INFORMATION TO DEVICES IN A BROADCAST NETWORK - Embodiments provide power-efficient mechanisms for communicating small amounts of information to receiver devices within a mobile broadcast system. A generic transport mechanism enables transmitting data relevant to upper layer protocols in a lower layer sub-channel so multiple information summary flows can share the same physical layer sub-channel Data fields are added to the Overhead Information Service (OIS) channel to provide power-efficient logical channels for carrying the summary information. Data from the power-efficient logical channels are provided to an upper protocol layer that receives the information summary flows. Information summary flow may carry a version number of an information flow in the broadcast signal, codes or other information. Receiver devices periodically monitoring the OIS receive the information summary flows. Employing an embodiment, a receiver device can minimize power consumption because reception of the OIS can indicate whether any new information flows are available, obviating a need to periodically check information flows.07-07-2011
20110167455ADAPTIVE MONITORING METHOD FOR UPDATE DETECTION IN A MOBILE BROADCAST NETWORK - Information included within metadata broadcast within an overhead flow of a mobile broadcast network enables receiver devices to determine when metadata updates will occur. The mobile broadcast network can include within metadata messages information related to a time for the next metadata update. Using this information, receiver devices can determine when the next metadata update will occur and de-energize the receiver until that time. Enabling mobile devices to remain de-energized until the next metadata update improves their power efficiency. Synchronizing mobile devices to access the overhead flow for updated metadata reduces the content delivery latency that the system must accommodate, thereby improving system flexibility and bandwidth efficiency. Specify the time of a next metadata update enables the broadcast system to change the rate and timing at which metadata updates are performed.07-07-2011
20110295978FILE DELIVERY OVER A BROADCAST NETWORK USING FILE SYSTEM ABSTRACTION, BROADCAST SCHEDULE MESSAGES AND SELECTIVE RECEPTION - Methods, systems and devices provide mechanisms and systems for efficiently delivering files over a broadcast system to mobile devices. Files for broadcast may be logically identified as belonging to a directory in a file system. A Broadcast Schedule Message may inform receiver devices of files that will be broadcast at a specified time, as well as describe the files. File may be transmitted in file delivery pipes, which may be of different bandwidth and data rates. Receiver devices configured according to the embodiments may make use of the broadcast schedule message to select files to be received based on the service or application with which the file is associated, and whether the file is new or an update to a previously received file. Receiver devices activate receiver circuitry to capture the files within their advertised broadcast window, and pass the received files to applications or services requesting the files.12-01-2011
20110307561SYSTEM AND APPARATUS FOR POWER-EFFICIENTLY DELIVERING WEBPAGE CONTENTS IN A BROADCAST NETWORK - Embodiments provide bandwidth efficient mechanisms for delivering rich media content, such as webpages, to receiver devices via a multimedia broadcast network. Content, such as selected webpages, is broadcast as disassembled content elements via the broadcast network. To enable reception, the disassembled content elements are broadcast according to a broadcast schedule that is communicated in an overhead content description flow, such as a catalog file. Receiver devices receive the catalog file and use the metadata information to selectively receive disassembled content and store the content elements in memory. When a user requests access to the content (e.g., a webpage via a web browser), an application operating in the receiver device assembles the requested content from the previously received and stored disassembled content elements, and passes the assembled webpage to a using or rendering application.12-15-2011
20130227080DASH CLIENT AND RECEIVER WITH PLAYBACK RATE SELECTION - A client device presents streaming media and includes a stream manager, a request accelerator, and a source component coupled to the stream manager and the request accelerator for determining which requests to make. A rate selection process can make rate decisions so that the buffer is filled when it is low, avoiding erratically changing rates and can choose the correct steady rate quickly. Multimedia download strategies can be used for HTTP that allow for accurate rate estimations, achieving link capacity even if network delays and packet loss rates are high, achieving timely delivery of the stream, and achieving relatively steady download rates with little short term variability. A receiver might use multiple HTTP connections, decompose media requests into smaller chunk requests, synchronize the connections using TCP flow control mechanisms, and request data in bursts. In addition, the receiver might use an HTTP pipelining process to keep the connections busy.08-29-2013
20130227122DASH CLIENT AND RECEIVER WITH BUFFER WATER-LEVEL DECISION-MAKING - A client/receiver downloads data over a network path between a source and the receiver coupled by the network path and stores the media data in a presentation buffer of the receiver and from there it is consumed by a presentation element. The receiver monitors a presentation buffer fill level that represents what portion of the presentation buffer contains media data not yet consumed by a presentation element. The receiver makes requests for additional data to download. If the fill level is above a high fill threshold, the receiver does not make further requests and eventually the fill level goes down. If the fill level is below a low fill threshold, the receiver restarts the downloading and updates the fill level as media data is consumed by the presentation element. The fill level might be measured in units of memory storage capacity and/or units of presentation time.08-29-2013
20140156863DASH CLIENT AND RECEIVER WITH A DOWNLOAD RATE ESTIMATOR - A client device presents streaming media and includes a stream manager for controlling streams, a request accelerator for making network requests for content, a source component coupled to the stream manager and the request accelerator for determining which requests to make, a network connection, and a media player. A process for rate estimation is provided that will react quickly to reception rate changes. The rate estimator can use an adaptive windowed average and take into account the video buffer level and the change in video buffer level in a way so to guarantee that the rate adjusts fast enough if there is a need, while keeping the windowing width large (and thus the measurement variance) large. A guarantee might be that when a rate drop or rise happens, the estimator adjusts its estimate within a time proportional to a buffer drain rate or buffer fill level.06-05-2014

Patent applications by Qiang Gao, San Diego, CA US

Qiang Gao, Aurora, CO US

Patent application numberDescriptionPublished
20090111080MEDICAL SIMULATION SYSTEM AND METHOD - A method, apparatus and system for simulating the release of radio opaque dye within a vasculature system. The method, apparatus and system include simulating a vessel tree of the vasculature system for display on a display device, activating a particle-based contrast software effect, and injecting a plurality of physics-based particles into a confined vessel space of said vessel tree. The method and apparatus may also include fading down over a period of time an opacity of each of the physics-based particles and opacifying a portion of a vessel wall.04-30-2009

Patent applications by Qiang Gao, Aurora, CO US

Qiang Gao, Beijing CN

Patent application numberDescriptionPublished
20110294460Wireless Gateway, System and Method for Automatic Call-For-Help - A wireless gateway, a system and a method supporting automatic call-for-help includes a wireless gateway which connects to a fixed line such as a fixed telephone. When a medical monitoring equipment detects an abnormal state of a patient, it notifies the wireless gateway. The wireless gateway then automatically dials the preset telephone number such as the number of an emergency center via the connected fixed line, or a mobile telephone in a short-range wireless connection to the wireless gateway automatically dials the number. Using the wireless gateway connected to a fixed telephone as location means solves the problem that existing location measures, like GPS, require high maintenance cost and cannot be used within buildings. In addition, the location information of a fixed telephone is accurate, which makes the present invention suitable for patient at home and in specific situations.12-01-2011
20140140425MIMO COMMUNICATION SYSTEM SIGNAL DETECTION METHOD - The present invention discloses a MIMO communication system signal detection method applied to a MIMO (Multiple Input Multiple Output) system with m transmitting antennas and n receiving antennas. The method comprises the following steps: acquiring the channel (from m transmitting antennas to n receiving antennas) matrix H by using a channel estimation algorithm; calculating a transmitted signal preliminary estimation vector [{circumflex over (x)}05-22-2014

Qiang Gao, Zhejiang CN

Patent application numberDescriptionPublished
20120279689HEAT EXCHANGE DEVICE - A heat-exchange device comprises a first heat exchanger defining an upper end and a lower end. A second heat exchanger defines an upper end connected to the upper end of the first heat exchanger and a lower end spaced apart from the lower end of the first heat exchanger in a substantially longitudinal direction such that a predetermined angle between the first heat exchanger and second heat exchanger is between about 0 and 180°. A wind-guide member is disposed between the first heat exchanger and second heat exchanger for guiding wind toward the first heat exchanger and second heat exchanger.11-08-2012
20130248158METHOD FOR MANUFACTURING REFRIGERANT GUIDE TUBE OF HEAT EXCHANGER, REFRIGERANT GUIDE TUBE MANUFACTURED USING THE METHOD AND HEAT EXCHANGER WITH THE REFRIGERANT GUIDE TUBE - A method for manufacturing a refrigerant guide tube of a heat exchanger and a refrigerant guide tube manufactured using the method and a heat exchanger with the refrigerant guide tube are disclosed. The refrigerant guide tube includes tube body and channels extending through a wall of the tube body. The tube body is formed by a butt joint of side edges of more than one bar-shaped plate materials along the length direction. The method allows forming the refrigerant channels of the guide tube before or during forming the tube body when the method is used to manufacture the guide tube, so as to avoid directly forming the channels on the tube body and make the process of manufacture the guide tube simpler and more convenient.09-26-2013

Qiang Gao, Weifang City CN

Patent application numberDescriptionPublished
20130243219WIRELESS DIGITAL COMMUNICATION METHOD AND SYSTEM - The present invention discloses a wireless digital communication method and a wireless digital communication system, relates to the technical field of wireless communication, and can increase the flexibility of communication in a wireless audio transmission system and the utilization ratio of resources of the system and effectively reduce the power consumption of the system. A wireless digital communication method according to an embodiment of the present invention comprises: acquiring communication status indication information which indicates a receiving terminal status and/or a channel status; generating frame structure adjustment information when it is known from the communication status indication information that a communication status has changed, and transmitting the frame structure adjustment information to a corresponding receiving terminal, wherein the frame structure adjustment information comprises radio packet adjustment information; and adjusting an adopted frame structure according to the frame structure adjustment information and performing data communication with the receiving terminal according to the adjusted frame structure. This solution applies to various wireless communication systems having high requirements on the transmission quality.09-19-2013

Qiang Gao, Hangzhou CN

Patent application numberDescriptionPublished
20130291579EVAPORATOR AND REFRIGERATION SYSTEM COMPRISING THE SAME - An evaporator (11-07-2013
20130312944REFRIGERANT DISTRIBUTING DEVICE AND HEAT EXCHANGER - A refrigerant-distributing device and a heat exchanger comprising the refrigerant-distributing device are provided. The refrigerant-distributing device comprises a distributing tube (11-28-2013
20140366571HEAT EXCHANGER - A heat exchanger comprises a first header (12-18-2014
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