Results 11 to 20 of about 9,797 (163)
How effective are entomopathogenic nematodes for vine weevil (Coleoptera: Curculionidae) biological control? A meta-analysis. [PDF]
Pest Manag SciEntomopathogenic nematodes provide reliable biological control of vine weevil larvae, reducing populations by 63% on average. All five tested species are effective, with temperature (18–30 °C) being the strongest predictor of success. Abstract BACKGROUND Vine weevil (Otiorhynchus sulcatus) is a globally important pest of soft fruit and ornamental crops
Roberts JM +5 more
europepmc +2 more sources
Gas Production by Monoester of Saturated Fatty Acids under Electrical Fault
Jurnal Nasional Teknik Elektro, 2022 This paper deals with the gas production by monoester oil intended to be used as insulating oil under an electrical discharge of low energy. The monoester contains only saturated fatty acids in its hydrocarbon chain. The electrical fault was realized by
Abdul Rajab +3 more
doaj +1 more source
Diagnostic Simplexes for Dissolved-Gas Analysis
Energies, 2020 A Duval triangle is a diagram used for fault type identification in dissolved-gas analysis of oil-filled high-voltage transformers and other electrical apparatus.
James Dukarm +2 more
doaj +1 more source
Investigation on gas generation characteristics in transformer oil under vibration
IET Generation, Transmission & Distribution, 2022 Operating experience has shown that characteristic gases can be found in oil‐immersed power transformers and high‐voltage reactors under strong vibration without discharge or thermal faults occurring.
Chong Guo +5 more
doaj +1 more source
Analysis of 11kV/ 430 V 500 kVA Transformer Dissolved Gas using Pre-processing Techniques through Duval’s Triangle [PDF]
Indian Journal of Science and Technology, 2021 Abstract Objectives: Analysis of dissolved gas in transformer oil is very important because the fluctuations in the oil will change the process of content of dissolved gases which will show effect on many factors such as oil temperature and external environment. Hence, it is important to propose a preprocessing technique through Duval’s triangle which
G V S S N Srirama Sarma +3 more
openaire +2 more sources
Energies, 2020 This research focuses on problem identification due to faults in power transformers during operation by using dissolved gas analysis such as key gas, IEC ratio, Duval triangle techniques, and fuzzy logic approaches.
Nitchamon Poonnoy +2 more
doaj +1 more source
IOT based classification of transformer faults using emerging techniques of E-nose and ANFIS
Frontiers in Energy Research, 2022 E-Nose finds its use in a wide range of applications such as quality assessment in food processing to toxic gas identification in chemical industry either in the offline or online mode.
Md. Danish Equbal +6 more
doaj +1 more source
Simplicial and Cellular Trees [PDF]
, 2015 Much information about a graph can be obtained by studying its spanning trees. On the other hand, a graph can be regarded as a 1-dimensional cell complex, raising the question of developing a theory of trees in higher dimension.
Duval, Art M. +2 more
core +2 more sources
IEEE Access, 2021 Detection of transformer faults avoids the transformer’s undesirable loss from service and ensures utility service continuity. Diagnosis of transformer faults is determined using dissolved gas analysis (DGA).
Sherif S. M. Ghoneim +4 more
doaj +1 more source
A Simple and Efficient Regularization Method for 3D BEM: Application to Frequency-Domain Elastodynamics [PDF]
, 2005 An efficient and easy-to-implement method is proposed to regularize integral equations in the 3D boundary element method (BEM). The method takes advantage of an assumed three-noded triangle discretization of the boundary surfaces.
Dangla, Patrick +3 more
core +6 more sources