摘要:
An improved approach is described for implementing transformations of data records in high concurrency environments. Each transformation is performed in parallel at the source when the data record is first generated. According to one approach for data integrity validation, record generators compute an integrity checksum for a newly generated record before copying into a data unit in shared memory. Subsequent generators may aggregate integrity checksums for data records into checksums for data units incrementally. This approach achieves end-to-end protection of data records against corruption using an efficient method of maintaining verifiable data integrity. In another approach, compression and encryption data transformations may be performed by themselves, or in combination with an integrity checksum transformation.
摘要:
An improved approach is described for implementing transformations of data records in high concurrency environments. Each transformation is performed in parallel at the source when the data record is first generated. According to one approach for data integrity validation, record generators compute an integrity checksum for a newly generated record before copying into a data unit in shared memory. Subsequent generators may aggregate integrity checksums for data records into checksums for data units incrementally. This approach achieves end-to-end protection of data records against corruption using an efficient method of maintaining verifiable data integrity. In another approach, compression and encryption data transformations may be performed by themselves, or in combination with an integrity checksum transformation.
摘要:
A stand for a skateboard or other board that is capable of folding flat for shipping, storage, and store display of the stand, but that can be folded into a three-dimensional shape capable of holding a skateboard upright, either vertically or horizontally, for storage and/or for display of the skateboard.
摘要:
A stand for a skateboard or other board that is capable of folding flat for shipping, storage, and store display of the stand, but that can be folded into a three-dimensional shape capable of holding a skateboard upright, either vertically or horizontally, for storage and/or for display of the skateboard.
摘要:
Techniques are provided for using an intermediate cache between the shared cache of a database server and the non-volatile storage of a storage system. The intermediate cache may be local to the machine upon which the database server is executing, or may be implemented within the storage system. In one embodiment, the database system includes both a DB server-side intermediate cache, and a storage-side intermediate cache. The caching policies used to populate the intermediate cache are intelligent, taking into account factors that may include which database object an item belongs to, the item type of the item, a characteristic of the item; or the database operation in which the item is involved.
摘要:
A method is described for conversion of natural gas or other fossil fuels to higher hydrocarbons, comprising the following steps: a) reaction of natural gas with steam and oxygenic gas in at least one reforming zone in order to produce a synthesis gas consisting primarily of hydrogen and CO, in addition to some carbon dioxide; b) passing said synthesis gas to a Fisher-Tropsch reactor in order to produce a crude synthesis stream consisting of lower hydrocarbons, water and non-converted synthesis gas; c) separation of said crude synthesis stream in a recovery zone, into a crude product stream mainly containing heavier hydrocarbons, a water stream and a tail gas stream mainly containing the remaining constituents; which is charaterized in that the method also comprises the following steps; d) stream reformation of at least part of the tail gas in a separate steam reformer; e) introduction of the reformed tail gas into the gas stream before this is led into the Fischer-Tropsch reactor.
摘要:
A method of increasing the production in an existing process plant for converting natural gas into a product, where the natural gas is first converted to a synthesis gas in a synthesis gas section, the synthesis gas is brought to reaction in a reactor for synthesis of the product, where non-converted synthesis gas and product are separated into two streams, where a product-rich stream is taken off the process, while a product-poor stream is re-circulated back as feed to the reactor together with fresh synthesis gas, and where part of the re-circulating stream is taken off the re-circulation loop as a purge gas, where the purge gas is separated into hydrogen-rich and hydrogen-poor streams, where hydrogen-rich streams are introduced in stages of the process where addition of hydrogen is desirable, and where the residual thermal value of the hydrogen-poor stream may be used for heating prior to the stream being discharged, wherein the synthesis gas from the synthesis gas section receives a hydrogen-rich stream from the separated purge gas, and that this hydrogen enriched synthesis gas is passed through a new flow reactor for production of product, and also a unit for separating a product-rich stream that is taken off, and a product-poor stream used as feed to the original reactor, and that the product-poor stream, which is used as feed to the original reactor, receives additional synthesis gas produced in a separate secondary synthesis gas line, is described. Additionally, a process plant for carrying out the method is described.
摘要:
A composite package structure having a paperboard cover and thermoformable inner tray is provided with a cut-out in the cover that exposes the transparent tray underneath, making the article inside and any graphics on it visible from the exterior. The package includes a spine so that it can fold like a book. The tray is provided with a pair of notches that provide relief from the stretching of the paperboard at the ends of the spine when the package is closed. The polymeric tray is preferably not glued or attached to the paperboard cover in the location of the spine so that the spine may buckle.
摘要:
A system for warning regarding the presence of manually attached grounding contacts (21) on high voltage conductors (3), comprises a) a naked additional conductor (1) close to the high voltage conductor (3), however spaced therefrom, and with an ability to be clamped resiliently to contact with the high voltage conductor (3) when the grounding contact (21) is attached; and b) a warning device (20) having connection means (4, 5) to the high voltage conductor (3) and to the additional conductor (1). The warning device has, in a part (24) arranged near the high voltage conductor (3), equipment for sensing whether the additional conductor (1) has been brought to contact with the high voltage conductor or not, and for transmitting a signal regarding this condition to another part (26) of the warning device which is remote from the high voltage conductor, preferably at ground potential. From this part (26) the signal can be transmitted to an operation central.
摘要:
A system is described that includes a network interface attached to a persistent memory unit. The persistent memory unit is configured to receive checkpoint data from a primary process, and to provide access to the checkpoint data for use in a backup process, which provides recovery capability in the event of a failure of the primary process. The network interface is configured to provide address translation information between virtual and physical addresses in the persistent memory unit. In other embodiments, the persistent memory unit is capable of storing multiple updates to the checkpoint state. The checkpoint state and the updates to the checkpoint state, if any, can be retrieved by the backup process periodically, or all at once upon failure of the primary process.