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338 results about "Data scrubbing" patented technology

Data scrubbing is an error correction technique that uses a background task to periodically inspect main memory or storage for errors, then correct detected errors using redundant data in the form of different checksums or copies of data. Data scrubbing reduces the likelihood that single correctable errors will accumulate, leading to reduced risks of uncorrectable errors.

Text joins for data cleansing and integration in a relational database management system

An organization's data records are often noisy: because of transcription errors, incomplete information, and lack of standard formats for textual data. A fundamental task during data cleansing and integration is matching strings—perhaps across multiple relations—that refer to the same entity (e.g., organization name or address). Furthermore, it is desirable to perform this matching within an RDBMS, which is where the data is likely to reside. In this paper, We adapt the widely used and established cosine similarity metric from the information retrieval field to the relational database context in order to identify potential string matches across relations. We then use this similarity metric to characterize this key aspect of data cleansing and integration as a join between relations on textual attributes, where the similarity of matches exceeds a specified threshold. Computing an exact answer to the text join can be expensive. For query processing efficiency, we propose an approximate, sampling-based approach to the join problem that can be easily and efficiently executed in a standard, unmodified RDBMS. Therefore the present invention includes a system for string matching across multiple relations in a relational database management system comprising generating a set of strings from a set of characters, decomposing each string into a subset of tokens, establishing at least two relations within the strings, establishing a similarity threshold for the relations, sampling the at least two relations, correlating the relations for the similarity threshold and returning all of the tokens which meet the criteria of the similarity threshold.
Owner:AMERICAN TELEPHONE & TELEGRAPH CO +1

Household cleaning robot capable of establishing map by self and cleaning method

The invention discloses a household cleaning robot capable of establishing a map by self and a cleaning method. The household cleaning robot comprises a casing, a control center arranged in the casing, a power supply module, a storage unit, a camera, a lighting alarm device, an ultrasonic wave sensor, an infrared sensor, a photosensitive sensor, a wireless module and an RFID reader-writer, wherein the ultrasonic wave sensor, the infrared sensor and the photosensitive sensor are respectively connected with the control center, and the wireless module and the RFID reader-writer are connected with the control center. The household cleaning robot further comprises a plurality of RFID labels bonded under the periphery of a wall, wherein the RFID labels are used for recording position coordinate information and are active RFID labels. The cleaning robot can establish the indoor two-dimensional map to achieve the indoor location function and acquire the coordinate points in a room. Walking areas and non-walking areas are marked on the two-dimensional map, so that the cleaning robot can quickly determine a cleaning path and accurately reach a target to be cleaned. To hygienic dead angles which cannot be cleaned, the cleaning robot is manually operated and controlled to automatically store operation and control data. When the hygienic dead angles are cleaned again, the stored operation and control data can be called to clean the target.
Owner:GUILIN UNIV OF ELECTRONIC TECH

Network overload detection and mitigation system and method

A system and method is disclosed for detecting and/or mitigating an overload condition from one or more first computers, such as a distributed denial of service (DDoS) attack, viral attack, or the like, targeting one or more of a plurality of second computers located on a network. While one or more DDoS attacks are mitigated, a meter, detection apparatus, software, or method, detects the condition being mitigated in a data cleaning center, and provides an alert or notification regarding the mitigated attack. Another preferred embodiment relates, in general terms, to a system and method for detecting and/or mitigating an overload or attempted overload condition targeting a domain name server. A network connection is provided for receiving one or more DNS requests from one or more client computers located on a network. A preferred embodiment includes a processor for providing a response to the one or more DNS requests to the one or more client computers if more than a threshold number of duplicate DNS requests are received. Another preferred embodiment relates, in general terms, to a system and method for detecting and/or mitigating an attempted overload condition targeting a networked computer system that uses a redirection module to divert data until it is deemed to be clean.
Owner:AKAMAI TECH INC

Application program control method, application program control apparatus, storage medium and mobile terminal

The embodiment of the invention discloses an application program control method, an application program control apparatus, a storage medium and a mobile terminal, the method comprises the following steps: within a set period, at intervals of set time, acquiring current behavior characteristics; acquiring a preset behavior prediction model generated based on a machine learning method, wherein the preset behavior prediction model is obtained through training of a behavior characteristics sample of a plurality of known control operations and used for predicting the control operations based on thebehavior characteristics; inputting the current behavior characteristics to the preset behavior prediction model to obtain a prediction result output by the preset behavior prediction model; according to the prediction result, automatically executing the control operations confirming to user behavior habits, wherein the control operations comprise data clearing and data updating operations of anapplication program. The technical scheme provided by the invention can automatically execute the application program control operations confirming to the user behavior habits, thus, intellectualization of application program control is promoted.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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