Publish in OALib Journal
APC: Only $99
Co-phase power supply system can solve the problems of
power quality of heavy unbalanced three phase, large harmonics and reactive
power and cancel neutral section in electric railway power supply system. In
order to do further research, a co-phase power supply test system is proposed.
By mean of analyzing on structures and principles of YNvd transformer, integrated power
flow controller (IPFC) and simulation load, establishing control strategy on IPFC
and simulation load, the system is simulated dynamically. The results illustrate
that the scheme can well simulate co-phase system, and the negative sequence is
eliminated, harmonic and reactive power are real-timely compensated in system.
Discovering genetic basis of diseases is an important
goal and a challenging problem in bioinformatics research. Inspired
by network-based global inference approach, Semi-global inference method is
proposed to capture the complex associations between phenotypes and genes. The
proposed method integrates phenotype similarities and protein-protein
interactions, and it establishes the profile vectors of phenotypes and
proteins. Then the relevance between each candidate gene and the
target phenotype is evaluated. Candidate genes are then ranked according to
relevance mark and genes that are potentially associated with target disease
are identified based on this ranking. The model selects nodes in integrated
phenotype-protein network for inference, by exploiting Phenotype Similarity
Threshold (PST), which throws lights on selection of similar phenotypes for
gene prediction problem. Different vector relevance metrics for computing the
relevance marks of candidate genes are discussed. The performance of the model
is evaluated on Online Mendelian Inheritance in Man (OMIM) data sets and
experimental evaluation shows high performance of proposed Semi-global method
outperforms existing global inference methods.
HVDC technology has been widely used in modern power system. On one
hand, HVDC has the advantages of economy, high efficiency and strong controllability.
While on the other hand, it makes the dynamic characteristics of the power
system becoming more and more complex. That puts forward a new challenge to
system stability and raises new questions for power system simulation. This
paper focuses on the interaction between AC and DC systems, especially the
problem of commutation failure caused by AC system fault. Based on the data of
China Southern Power Grid, this paper calculates the fault regions that may
cause commutation failure and calculates the system critical clearance time
under different load models, analyzes the impacts of different load models on
commutation failure and the stability of AC/DC hybrid system.