114 results about "Short loop" patented technology

A bottle and / or can holder including a strap of nylon webbing looped at one end through a square ring and back through a cinch buckle for length adjustment. The ring is also connected to a short loop of webbing that encircles a Velcro-adjustable cuff for attachment to a child carrier, car seat, wrist or the like. The other end of the strap is sewn to a larger Velcro-adjustable compression cuff for attachment around a bottle, can or the like. The compression cuff has a non-slip rubber (neoprene) strip sewn into the cuff to securely grip the container that it holds. An alternate embodiment of the invention comprises a bottle / can tether including a fixed strap attached to a triangular carabiner at one end, and to a Velcro-adjustable cuff at the opposing end. This cuff is for attachment around a bottle, can or the like, and it has a non-slip rubber (neoprene) strip sewn into it to securely grip the container that it holds. When applied, the devices will securely tether a bottle or can and prevent ground contact and spillage if, for instance, a baby throws his bottle.

A digital subscriber line (DSL) modem for a service area interface, which controls the power of its downstream transmissions to minimize far-end crosstalk (FEXT), is disclosed. The disclosed modem has an interface to a low-attenuation upstream facility, such as fiber optic, and includes a digital transceiver and an analog front end that is coupled to a twisted-pair wire facility in a binder. The modem also includes a memory location for storing the feeder distance between a DSL central office and the service area interface, the service area interface also coupled to a subscriber of the CO-fed communications via twisted-pair wire. Power cutback levels are applied to the downstream transmissions from the modem according to the feeder distance, so that the FEXT on the CO-fed signal is minimized without undue data rate degradation.

According to certain general aspects, the present invention relates to methods for transmitting signals on twisted wire-pairs above 30 MHz using frequency division duplexing (FDD) in support of 1 Gb / s aggregate services on short loop lengths while maintaining spectral compatibility with legacy ADSL2 (≦2.2 MHz bandwidth) and VDSL2 services (≦30 MHz bandwidth). An advantage of the FDD approach for Gb / s transmission according to the invention is spectral compatibility with legacy DSL services without the sacrifice of any capacity of the wider band.

A delay mismatched feed forward power amplifier is disclosed. Loop 1 includes a main amplifier and is used to derive a carrier cancelled sample of the main amplifier output. Loop 2 includes an error amplifier used to amplify the carrier cancelled signal derived from Loop 1 operation in order to cancel distortion products generated due to the nonlinear nature of the main amplifier. Loop 2 also utilizes a very short Loop 2 delay line. A significant efficiency gain is provided due to reduced output power losses associated with the Loop 2 delay line. Lower output losses also results in lower distortion levels produced by the main amplifier. This, in turn, reduces the size and performance requirements placed on the error amplifier. A smaller and more efficient error amplifier is employed resulting in further amplifier system efficiency improvement. The delay mismatch is compensated by a third control loop, a special adaptive control algorithm or a combination thereof.

A feed forward power amplifier is disclosed which utilizes three signal cancellation loops. Loop 1 includes a main amplifier and is used to derive a carrier cancelled sample of the main amplifier output. Loop 2 includes an error amplifier used to amplify the carrier cancelled signal derived from Loop 1 operation in order to cancel distortion products generated due to the nonlinear nature of the main amplifier. Loop 2 also utilizes a very short Loop 2 delay line. A significant efficiency gain is provided due to reduced output power losses associated with the Loop 2 delay line. Lower output losses also results in lower distortion levels produced by the main amplifier. This, in turn, reduces the size and performance requirements placed on the error amplifier. A smaller and more efficient error amplifier is employed resulting in further amplifier system efficiency improvement. A spurious signal detector for out-of-band distortion detection and an associated microcontroller for Loop 1 and Loop 2 control are also provided. A third signal cancellation loop is utilized to sample the amplifier output and reduce the carrier level of the signals sampled at the output of the amplifier before providing the sampled output to the spurious signal detector. By significantly reducing the carrier power level relative to distortion power levels a cost effective spurious signal detector can be utilized. This also provides a faster conversion time in Loop 2 cancellation and enhanced cancellation of out-of-band distortion products due to a greater useful dynamic range available for the DSP employed in the spurious signal detector.

The invention relates to a local shortest loop based social network group division method. The method specifically comprises the steps of reading social network data, and constructing a social network graph taking social network users as nodes and user relationships as edges; endowing each user with a unique tag value representing a community that the user belongs to; and updating tags of user nodes by adopting a local shortest loop based tag propagation algorithm to obtain a community structure of a social network, wherein the closely relevant nodes have the same tag values through iterative updating for multiple times. According to the social network group division method provided by an embodiment of the invention, a tag propagation algorithm is improved with an attribute whether a local loop is constructed or not in a user relationship graph; and compared with an existing community network division method, the division of user groups is favorable for improving the accuracy of community division, the community structure in the social network is effectively mined, and division results have relatively high application values in the fields of network public opinion monitoring, search engines, commercial target mining and the like.

The invention relates to a short-loop fiber optic gyroscope. The prior method for improving the precision of the fiber optic gyroscope by increasing the length of a fiber optic ring leads to the great limitation of the dynamic range of the gyroscope and the reduction in bandwidth. According to the method, an input port at one end of a first coupler is connected with a broadband light source, an output port of the first coupler is connected with a detector, and a port at the other end of the first coupler is connected with a single-end port of a Y waveguide. One port of double-end ports of the Y waveguide is connected with a port at one end of a second coupler, the other port of the double-end ports of the Y waveguide is connected with a port at one end of a third coupler, and the other port at the end of the second coupler is connected with the other port at the end of the third coupler. Two ends of the fiber optic ring are connected with a port at the other end of the second coupler and a port at the other end of the third coupler respectively. The gyroscope has larger dynamic range and bandwidth, reduces poor reciprocity caused by a winding defect of the fiber optic ring and improves the adaptability of the gyroscope.

The invention relates to a base matrix, a encoder / decoder of Low Density Parity Check (LDPC) codes and a generation method thereof. The encoder / decoder is determined uniquely by the parity check matrix of the LDPC codes. With different code sizes, said parity check matrix can be obtained by expanding different base matrixes, and also can be obtained by expanding a unique base matrix after correction. Elements of said base matrix must meet an inequation in which the girth value is up to the standard, e.g. when girth≧6, for any element i, j, k, l in the matrix which forms the short loop having a length of 4 in anticlockwise, there are always mod(i−j+k−l, z) unequal to 0. By this invention, the girth of the constructed base matrix is made as large as possible, the amount of the shortest loops is as few as possible when it is the same girth, thus the curve of bit error ratio (BER) is dropped quickly, the error floor of the LDPC codes is eliminated effectively, and the optimal performance of the LDPC codes is obtained.

A method and system for achieving a maximum bit rate in a DMT system using a quad spectrum under constraints of avoiding interference with radio frequency interference (RFI). The methods of an embodiment of the present invention, when combined in various combinations, optimize bit allocation and utilizes bins in notched areas for transmission over short loops without violating the power spectral density (PSD) mask.

The invention relates to carbon fiber precursor jet stretching process based on data driving cooperative intelligent control. The process route is as follows: spinning melt is accurately metered through a metering pump, enters a spinneret assembly and then enters coagulating bath after being extruded by a jet; a certain ratio of jet stretching is achieved under cooperative intelligent control of a coagulating bath guide roller; and the spinning melt leaves the coagulating bath finally. The carbon fiber precursor jet stretching process based on the data driving cooperative intelligent control is composed of biological intelligent controller design process based on data driving, and intelligent cooperative optimal control process based on multiple-component data collaboration. According to the biological intelligent controller design process based on the data driving, an endocrine ultra-short loop feedback biological intelligent controller is adopted for a controller, data driving improvement is carried out on the endocrine ultra-short loop feedback biological intelligent controller, and the endocrine ultra-short loop feedback biological intelligent controller is designed without dependence on object models; and according to the intelligent cooperative optimal control process based on the multiple-component data collaboration, the intelligent cooperative optimal control of jet stretching ratios is achieved through collecting other spinning component data with cooperative relations and carrying out cooperative optimal computation on the data.

A high-speed short-loop bus topology that routes the bus into a first expansion connector and out of a first expansion card inserted within the connector is disclosed. The bus is not routed out of the first expansion connector. Instead, the bus is routed from the first expansion card into a second expansion card by a jumper mechanism. The bus is routed through the second expansion card and out of a second expansion connector housing the second expansion card, where the bus can be terminated or routed into another expansion connector having another expansion card. By routing the bus in this manner, it is shorter than prior art buses found in loop-through bus systems and capable of substantially maintaining a uniform transmission line impedance. Moreover, the operating bandwidth of the short-loop bus is increased since the bus is short and does not have stubs or signal reflections.

The invention discloses a short-loop-free QC-LDPC code rapid generation method, which comprises the following steps: step 1, generating sub-matrixes of various edges according to a degree distributionfunction and a compression factor Q, and randomly assigning cyclic shift amounts of each edge 1-Q; step 2, arranging the sub-matrixes according to the positions of various edges to construct a basismatrix; step 3, traversing each node of the sub-matrix to search for a short ring, and randomly assigning 1-Q cyclic shift values again to eliminate the short ring; and step 4, expanding the basis matrix into a check matrix according to the cyclic shift amount of each edge. Aimed at problems in an actual QKD system, the coordination efficiency, the decoding speed and the success rate of an LDPC code check matrix are influenced due to the existence of a short loop, and then the safety code rate and the transmission distance of a system are influenced, the invention provides the short-loop-freeQC-LDPC code quick generation method suitable for the QKD system. The short-loop-free check matrix can be quickly generated, and the decoding performance is improved.

A design structure provides instruction fetching within a processor instruction unit, utilizing a loop buffer, one or more virtual loop buffers, and / or an instruction buffer. During instruction fetch, modified instruction buffers coupled to an instruction cache (I-cache) temporarily store instructions from a single branch, backwards short loop. The modified instruction buffers may be a loop buffer, one or more virtual loop buffers, and / or an instruction buffer. Instructions are stored in the modified instruction buffers for the length of the loop cycle. The instruction fetch within the instruction unit of a processor retrieves the instructions for the short loop from the modified buffers during the loop cycle, rather than from the instruction cache.