摘要:
Optical tracking systems, method, and devices are described in which optical components detect light within a substantially planar region adjacent to a user device. Tracking logic may receive signals output by the optical components and determine coordinates associated with a movement of a pointing object through the substantially planar region. The tracking logic may then provide for translation of the coordinates into an action on a display, such as, for example, a movement of a cursor or other icon on the display.
摘要:
Hyper-inflammatory responses can lead to a variety of diseases including sepsis. It is now shown that extracellular histones released in response to inflammatory challenge are mediators contributing to endothelial dysfunction, organ failure and death during sepsis. As such, they can be targeted pharmacologically by inhibitors, as well as used as biomarkers for prognosis of sepsis and other diseases.
摘要:
A current multiplier/divider-configured, feed-forward compensation circuit for a pulse width modulator (PWM) controller for a buck-mode DC-DC converter is operative to achieve constant loop gain irrespective of the magnitude of the input voltage, obviates the need for parameter calculations/adjustments of circuit components to conform with the PWM frequency selected by the user, and is effectively immune to variations in temperature and manufacturing process.
摘要:
A wireless device with a capacity for high bandwidth connectivity adapted to provide access to the Internet or other WAN for a single user or multiple concurrent users. The wireless access device acts as a network point of presence to provide access to a number of different devices. Authorization is performed and billing measures are established in real time. Billing credits may be provided to an account associated with the user of the wireless access device based upon selected metrics (for example, duration of the connection or amount of data passed). In certain implementations, devices that are previously unknown to the wireless access device and that have not received a wireless access device-specific configuration can be provided network access. Thus, instead of a hard-wired point of presence to the Internet, a mobile, ad hoc point of presence is established through the wireless access device.
摘要:
According to some embodiments, a process, voltage, and temperature compensated clock generator is disclosed. The clock generator may be a charge-charge clock generator including a first load capacitive element and a second load capacitive element. A process, voltage, and temperature compensated current source is coupled to the charge-charge clock generator, and is used to charge the first load capacitive element and the second load capacitive element.
摘要:
Basic matrix based on irregular LDPC codes, codec and generation method thereof. The codec includes an encoding/decoding operation module and a basic matrix storage module. In the stored basic matrix Hb, for all girths with length of 4, any element of i, j, k or l constituting the girths in anti-clockwise or clockwise always satisfies inequality: mod(i−j+k−l, z)≠0, wherein z is the extension factor. When generating the basic matrix, firstly the number of rows M, number of columns N, and weight vectors of the rows and columns are determined, an irregularly original basic matrix is constructed; then the position of ‘1’ is filled by a value chosen from set {0, 1, 2, . . . , z−1} to obtain the basic matrix Hb, which is made to satisfy the above-mentioned inequality. The basic matrix Hb obtained by storing, which is configured with corresponding encoding/decoding operation module, constitutes the desired encoder/decoder. The encoder/decoder according to the present invention can effectively eliminate error-floor phenomenon of LDPC codes and accelerate the falling speed of BER curve.
摘要:
A laser range finder includes a laser and a photosensitive element. The laser projects a beam onto a target surface. A backscattered portion of the laser beam returns to the laser from the target surface and enters the laser emitting cavity. Variations in laser output power are detected by the photosensitive element, which provides a “beat” signal to a frequency detection circuit. The frequency detection circuit includes a difference frequency analog phase locked loop (DFAPLL) providing a purified form of the beat signal. The frequency of the purified beat signal is determined and used to calculate distance to the target surface.
摘要:
A laser range finder includes a laser and a photosensitive element. The laser projects a beam onto a target surface. A backscattered portion of the laser beam returns to the laser from the target surface and enters the laser emitting cavity. Variations in laser output power are detected by the photosensitive element, which provides a “beat” signal to a frequency detection circuit. The frequency detection circuit includes a difference frequency analog phase locked loop (DFAPLL) providing a purified form of the beat signal. The frequency of the purified beat signal is determined and used to calculate distance to the target surface.
摘要:
Methods and compositions are provided for down regulation of target gene expression in vivo by RNA interference. The methods are useful for target discovery and validation of gene-based drug development, and for treatment of human diseases.
摘要:
A method for decreasing combustor acoustics in gas turbine engines is provided. The method includes fabricating a plurality of premixers, chamfering a trailing edge of a main swirler shroud of each premixer, coupling a respective one of the chamfered premixers to each of a plurality of combustor domes, and coupling the plurality of combustor domes to an inlet of a combustor in a circumferential arrangement such that, during operation, the chamfered edge facilitates reducing combustor acoustics.