In comparison to alternative identification methods such as graphical-based passwords, textual-based passwords, and email verification, biometric authentication systems provide improved convenience and security for ac...
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this paper develops IC&NEV simulation software based on UML object-oriented programming, Builder design pattern, MATLAB, PostgreSQL and SuMO. By using Python program, the road network document data is preprocessed...
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Contactless 3D fingerprint gains significant attention in recent years. Much of previous works for 3D fingerprint verification were based on minutiae. they required a series of laborious preprocessing and relied on so...
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In response to the issue that existing human action recognition models can not make full use of complementary information from different modalities, this thesis proposes a multi-path attention module MA to form the MA...
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In order to study the intelligent semantic recognition of Chinese linguistics under the informationization of big data, this paper designs a set of quantified pressure index system, and introduces a self-organizing fe...
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the latest research results show that activity recognition based on frequent pattern mining is the main method. Its advantages are that the activity patterns obtained through learning mining are comprehensive and accu...
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the creation of an automated security system aims to protect residences and workplaces by automating visitor entrance and enabling more flexibility in visitor record maintenance. Among all biometric authentications, f...
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Based on semantic recognition, this paper studies the intelligent segmentation framework and data layering of Chinese language and literature. First of all, in this paper, in the study of predicting Chinese semantic w...
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Synchronous condensers offer significant benefits in large reactive power capacity and strong voltage support ability, which can effectively solve prominent problems such as commutation failure and voltage drop of ult...
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ISBN:
(纸本)9798350359589
Synchronous condensers offer significant benefits in large reactive power capacity and strong voltage support ability, which can effectively solve prominent problems such as commutation failure and voltage drop of ultra-high voltage DC converters. they are increasingly widely used in power grids. However, the large-capacity condenser has a large volume and complex structure and is prone to faults, which urgently requires research on fault feature analysis and diagnosis technology. this article analyzes the features of large-capacity synchronous condensers and their engineering advantages, such as increasing the short-circuit ratio of the receiving power grid, improving the transmission limit power, working in a forced excitation state for voltage support in the event of a commutation failure at the UHVDC receiving end, absorbing excess reactive power to suppress sudden voltage rise during DC blocking, and providing dynamically adjustable reactive power support for the AC power grid through flexible switching of late or leading phase states. this article provides common faults, such as mass imbalance, misalignment, friction, oil film oscillation, etc. At the same time, the fault characteristics are analyzed using computer simulation analysis, laboratory simulation analysis, and on-site measurement testing methods. A standard fault diagnosis method for synchronous condensers is proposed on this basis, utilizing fault patternrecognition and credibility evaluation. By establishing a library of fault models for the synchronous condenser and employing time-domain and frequency-domain signal analysis techniques, the credibility and nature of the fault are determined by calculating the instantaneous values and rate of change of the sampled signal using eigenvalues. through the comparison and analysis of pertinent standards and historical data, the severity of the fault is ascertained, along withthe trend and severity of the problematic synchronous condenser. the findings
this paper aims to improve the reliability and safety of cables, prolong the service life of cables and reduce the operating cost of power systems. the paper examines in detail how partial discharge (PD) patterns are ...
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