International Business Machines Corporation

Other

Beijing Volcano Engine Technology Co., Ltd.

Inshon Inc

Jing Wen

Guan Jun Liu

Bei Chun Zhou

Niao Qing Liu

Ai Lian Mi

Yan Xin Li

Yu Meng Li

Yin Xiang Xiong

Yu Wang

Xin Xu

Shu Hua Liu

Wei Zeng

Li Na Wang

Zhichao Liu

Xiaoyu Zhang

Ting Cai

Yin Xiang

Hongxia Qin

Hualong Yu

Songyuan Guan

Fengmei Cao

Xianchao Guo

Weichao Guo

Hongming Mei

Ailian Mi

The present disclosure relates to an alarm data processing method, an apparatus, a medium and an electronic device. The method includes: obtaining a plurality of pieces of alarm data to be processed; for each piece of alarm data of at least a portion of the plurality of pieces of alarm data, extracting threat indicators from the piece of alarm data; and for each threat indicator of at least a portion of the threat indicators that are extracted, performing data correlation analysis on the threat indicator to correlate pieces of historical data related to the threat indicator.

Alarm data processing method, apparatus, medium and electronic device

A suppression method of high-frequency resonance for VSC-HVDC (Voltage Source Converter-High Voltage Direct Current Transmission) system based on nonlinear filter in voltage feed-forward control. It includes that the nonlinear filter is used for the voltage feed-forward link in the current inner loop control. The specific method is to extract each sequence component of the AC (Alternating Current) voltage, calculate the average value of the sequence component at N sample points, compare the current average value with the output result of nonlinear filter in the previous period, and output the result of nonlinear filter in the current period. After corrected, the result is a fixed value varying according to gradient which acts on the voltage feed-forward link of the inner loop. The invention can effectively suppress the high frequency resonance caused by impedance matching between VSC-HVDC system and grid system without losing the rapidity, and at the same time, it can adjust with AC voltage when voltage disturbance such as AC fault occurs, so as to reduce the risk of over-current of the converter valve. At present, the invention only needs to be realized in the secondary control software link without adding a new equipment, which is also low cost, no occupancy of land and convenient for engineering practice.

Suppression method of high-frequency resonance for VSC-HVDC system based on nonlinear filter in voltage feed-forward control

According to one embodiment, a method, computer system, and computer program product for memory corruption diagnosis is provided. The present invention may include generating a pattern expression (PE) header file, wherein a plurality of common datatypes associated with a software program are pre-defined. The invention may further include generating a PE for each of the plurality of common datatypes, and generating a PE table by merging the generated PEs for each of the plurality of common datatypes. Upon discovery that memory corruption has occurred, the invention may include transmitting a recorded state of the software program as a core dump file to a server, and using a dump utility to identify overlay content of the core dump file. Lastly, the invention may include identifying a possible source program of the memory corruption by matching the PE tables against the illegally-written overlay content.

Problem diagnosis technique of memory corruption based on regular expression generated during application compiling

Embodiments for data deduplication in a data deduplication environment by one or more processors. A data extent, existing on a remote server instance, may be denoted as a virtual base extent to eliminate redundant transfer of the data extent for fast data deduplication in a distributed data protection environment. A synchronization operation is performed to replace the virtual base extent with actual data via a replication process.

Fast data deduplication in distributed data protection environment

A system, method, and computer product for managing a password includes receiving a new password set by a user via a key input interface, generating a diagram based on key positions, on the key input interface, of a plurality of characters associated with said new password, storing a diagram into a memory device coupled to the processing device, and providing said diagram stored in the memory device to the user as a password hint.

Password hint generation mechanism

In the technical field of data storage and access, the invention relates to the technique of data transmission using a storage area network (SAN) in a magnetic disk storage device environment, including a method for transmitting data over a SAN in such an environment, including: determining a logical volume accessible to a server of the magnetic disk storage device; obtaining information on a logical volume accessible to a client of the magnetic disk storage device, which is determined by the client; establishing a corresponding relationship between the logical volume accessible to the server and the logical volume accessible to the client; receiving a request for using the logical volume of the magnetic disk storage device from the client; and informing the client of an available logical volume by utilizing the corresponding relationship so that a data access to the available logical volume is performed by the client over the SAN.

Transmitting data by means of storage area network

The present disclosure discloses a method and system for data deduplication. The method comprises: acquiring meta data and multiple data chunks corresponding to at least one original data object, which are generated by using a data deduplication method; combining the acquired multiple data chunks into a new data object; performing deduplication on the new data object to generate new meta data and new data chunks corresponding to the new data object; and storing the meta data corresponding to the at least one original data object, the new meta data corresponding to the new data object, and the new data chunks. The method and system can further improve deduplication ratio, lower data storage amount, and save costs.

Method and system for data deduplication

This invention involves one kind of liquid crystal color light switch, made especially from cholesteric liquid crystals. By changing the voltage applied, the reflection wavelength of the color light switch can be controlled, leading to a rapid change of the reflected light from red to green to blue in rapid succession, thus creating a color display. The core technology of this invention is making the voltage applied to the cholesteric liquid crystal less than the untwisted voltage and still in good focal conic state, that is the symmetric axis are in the same direction, and the pitch is varied according to the voltage applied.

Liquid crystal color switch and method of manufacture

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Beijing, China

Jing Wen