Zobrazeno 1 - 10
of 4 726
pro vyhledávání: '"Qin Lei"'
Publikováno v:
Cailiao gongcheng, Vol 52, Iss 9, Pp 19-26 (2024)
The uniform ZnO submicron spheres composed of nanodots were synthesized by solvothermal method and then added to PZT5A powder for spark plasma sintering. The effects of ZnO addition on phase composition, microstructure and electric properties of th
Externí odkaz:
https://doaj.org/article/16a2be7b3b2f406087de5f6caac1c679
Publikováno v:
Acta Psychologica, Vol 247, Iss , Pp 104307- (2024)
Increasing research has focused on how ovarian hormones influence individual prosocial motivation and cooperation. However, most results remain ambiguous and contradictory. Here, we collected progesterone (PROG) and oestradiol from 62 healthy women w
Externí odkaz:
https://doaj.org/article/f4a665169e0b4cf1bf0efcecd65675f3
Publikováno v:
Shipin gongye ke-ji, Vol 44, Iss 7, Pp 337-342 (2023)
This research investigated egg freshness of Roman pink in 4 storage temperature change groups. The shell eggs were storage for 0, 10, 20, 30 d, and weight loss, gas chamber height, Haugh unit, yolk index, thick-to-thin albumen ratio and albumen pH of
Externí odkaz:
https://doaj.org/article/aa667c511f504803b2f38c738b3ca5ab
Publikováno v:
Meitan kexue jishu, Vol 51, Iss 1, Pp 283-294 (2023)
In order to study the mechanical damage characteristics and energy evolution law of coal after ultrasonic fracturing, uniaxial compression experiments were carried out on fractured coal with different power by using electronic universal pressure test
Externí odkaz:
https://doaj.org/article/231984f1507f4198a7873874deeded24
Publikováno v:
IEEE Open Journal of Power Electronics, Vol 3, Pp 433-449 (2022)
This paper proposes a novel multilevel topology “Modular-Isolated-Multilevel-Converter” which achieves almost zero low frequency capacitor voltage fluctuation. It inherits the structure of MMC but replaces the half bridge module by the newly prop
Externí odkaz:
https://doaj.org/article/a37be5b30a014cefade07fd15278aecd
Publikováno v:
IEEE Open Journal of Power Electronics, Vol 3, Pp 402-418 (2022)
This paper proposes a generalized design methodology of a robust controller to mitigate the impact of system uncertainty on controller stability and performance which includes steady-state error, disturbance rejection, high-frequency noise attenuatio
Externí odkaz:
https://doaj.org/article/aa0fc03ce9364089a50bb3197bdbb441
Publikováno v:
IEEE Open Journal of Power Electronics, Vol 3, Pp 115-130 (2022)
Series connection of devices is an effective way to achieve higher blocking voltage. SiC MOSFETs exhibit narrow short-circuit withstand time and generally much lower short-circuit robustness than silicon IGBTs. This puts a critical concern on their u
Externí odkaz:
https://doaj.org/article/515d43fb91d64bddb077f7433d821ad0
Publikováno v:
Frontiers in Ecology and Evolution, Vol 10 (2022)
Plant nutrient stoichiometry indicates the balance of plant internal nutrients and its nutrient-use strategies in response to environmental changes. However, the responses of nutrient stoichiometry in different wetland plant organs under agricultural
Externí odkaz:
https://doaj.org/article/eb67d59978964f5ab49fcbe7a42889eb
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-1 (2023)
Externí odkaz:
https://doaj.org/article/433bb5829c9543298bde1159ade1d631
Publikováno v:
IEEE Open Journal of Power Electronics, Vol 2, Pp 346-367 (2021)
The voltage rating of the commercial Gallium Nitride (GaN) power devices are limited to 600/650 V due to the lateral structure. Stacking the low-voltage rating devices is a straightforward approach to block higher dc link voltage. However, the unbala
Externí odkaz:
https://doaj.org/article/25b8291ebd6a4812971d2266aabd09bc