摘要:
A maximum likelihood decoder creates a decoding target data string and provides error candidates that are effective for an error correction circuit. The decoder has a detector for creating a decoding target data string, and an error candidate extractor for extracting the bit positions of which likelihood of each bit shows a high probability of error as the error candidates of the decoding target data string based on the likelihood information from the detector. Since only the bit positions of which error probability is high are extracted as error candidates, a correction circuit can extract the error candidates in the sequence of the lower likelihood, and the number of times of sorting in the sequence of likelihood can be decreased.
摘要:
An encoder divides the data in which sector data is adjacently connected to a first RS parity generated in Reed Solomon encoding into blocks to and subjects each of the blocks to cyclic Hamming encoding so as to generate Hamming parities. Subsequently, the data in which the Hamming parities are aligned in a row is subjected to Reed Solomon encoding so as to generate a second RS parity, and encoded data in which the first RS parity and the second RS parity are adjacently connected to the sector data is output. A decoder divides the sector data and the first RS parity into n blockes and cyclic Hamming encoding, aligns the parities thereof, corrects errors in the parities by Reed Solomon decoding by the second RS parity, then corrects 1-bit errors in blockes by cyclic Hamming decoding, and further corrects errors of 2 or more bits by Reed Solomon decoding by the first RS parity.
摘要:
The present invention provides a semiconductor memory device which comprises an interlayer insulating film formed on a semiconductor substrate, a contact plug formed in the interlayer insulating film and having one end electrically connected to the semiconductor substrate, a ferroelectric capacitor formed on the interlayer insulating film and comprising a first electrode, a ferroelectric film and a second electrode electrically connected to the other end of the contact plug, an insulating film which covers the ferroelectric capacitor and has an opening that exposes the first electrode, and a wiring film which covers the ferroelectric capacitor and the insulating film and is electrically connected to the first electrode exposed through the opening and which consists of a material having conductivity and even a hydrogen diffusion preventing function.
摘要:
One set of syndromes is calculated from a first data string from among a plurality thereof including at least 2t+1 pieces of symbols as a parity string, and coefficients of an error locator polynomial from the one set of the syndromes. Whether or not a correction is successful is judged by using the coefficients of the error locator polynomial and the same calculation is performed for a second data string if a correction failure is judged. Contrarily, if a correction success is judged, an error of the first data string is corrected by using the aforementioned set of the syndromes and the coefficients of the error locator polynomial.
摘要:
The present invention relates to a centrifugal compressor using a dry gas seal system for protecting seal means. A multistage centrifugal compressor has primary dry gas seal means for preventing leakage of working gas from a machine inner side, and secondary dry gas seal means for backing up the first dry gas seal means. A seal gas line for introducing the gas leaked from the first and second dry gas seal means to the outside of the machine is installed between the primary dry gas seal means and the secondary dry gas seal means. The gas seal line has an orifice and a check valve, and buffer means is installed between the orifice and the check valve.
摘要:
When a zero run, which violating G constraint of a run-length-limited (RLL) code, is detected from the data stored in a first input register 1111 and a second input register 1112, bits before and after the zero run is transferred to a temporary register 1150 via a bus for zero run removal 1130 to be combined to each other. Thus, by effectively using the mechanism of bus transfer, a circuit can be simplified, thereby realizing a small circuit.
摘要:
A method of producing a ferroelectric capacitor includes the steps of preparing a semiconductor substrate; forming a first insulating layer on the semiconductor substrate; laminating sequentially a metal layer, a first conductive layer, a ferroelectric layer, and a second conductive layer on the first insulating layer to form a capacitor forming laminated layer; forming an etching mask forming layer with strontium tantalite or strontium niobate; forming a silicon oxide layer on the etching mask forming layer for covering a ferroelectric capacitor forming area; forming an etching mask through wet etching of the etching mask forming layer with the silicon oxide layer; and forming a lamination formed of a barrier metal, a lower electrode, a ferroelectric layer, and an upper electrode through dry etching of the capacitor forming laminated layer with the etching mask.
摘要:
In an apparatus for displaying a flying object, an air flow is created in a duct by a group of blowers. A holding line is attached to a lightweight flying object, and movement of the lightweight flying object is restricted by the holding line. By making the lightweight flying object fly in the air flow, the lightweight flying object is able to fly even in a small space.
摘要:
A process for obtaining an aqueous fumaric acid solution which is useful in stably obtaining a large amount of aqueous fumaric acid solution. A column is packed with solid fumaric acid and then water is passed through the column, thereby giving an aqueous fumaric acid solution. Water is usually passed in the reverse direction. The solid fumaric acid may be in the form of tablets containing 70% by weight or more of fumaric acid. The aqueous fumaric acid solution thus obtained has a pH value of about 1 to 4. A urinal, etc. is treated with a fumaric acid-containing deodorizing agent to thereby efficiently deodorize nitrogen-containing bad-smelling components over a long period of time. A solid deodorizing agent containing fumaric acid, which has an extremely low solubility and a low dissolution rate in water, is placed on a urinal to deodorize the same.
摘要:
The invention provides a process for the preparation of a thermoplastic elastomeric resin composition comprising (a) 100 parts by weight of a block copolymer consisting of at least two polymeric blocks (A) composed of a vinyl aromatic compound and at least one polymeric block (B) composed of a conjugated diene compound, or a hydrogenated block copolymer, (b) 20 to 300 parts by weight of a non-aromatic softening agent for rubber, (c) 1 to 100 parts by weight of a peroxide-crosslinking type olefinic resin or a copolymeric rubber containing said resin, and (d) 10 to 150 parts by weight of a peroxide-decomposition type olefinic resin or a copolymer containing said resin, characterized in that the process comprises a step of heat-processing component (a), component (b), at least a part of component (c) and a part of component (d) in the presence of an organic peroxide to cause crosslinking, and a subsequent step of blending these with the remaining part of component (d) and, if any, the remaining part of component (c). The obtained composition is soft and good in rubber properties, mechanical strength and processability, and is less sticky.