Time filter

Source Type

Xiangshan, China

Iordanskii A.L.,RAS Semenov Institute of Chemical Physics | Chvalun S.N.,Russian Academy of Sciences | Shcherbina M.A.,RAS Research Center Kurchatov Institute | Karpova S.G.,RAS Semenov Institute of Chemical Physics | And 7 more authors.
Journal of the Balkan Tribological Association | Year: 2013

The specific features of novel blends on the basis of copolymers 3-hydroxybutyrate with hydroxyvalerate (95:5 mol %) (PHBV) and segmented polyetherurethane (SPEU) have been investigated. The samples with different content (100/0, 60/40, 40/60, 50/50, and 0/100 wt.%) are explored by structural (WAXS, FTIR), thermophysical (DSC) and dynamic (probe ESR nanoananlysis, HD isotopic exchange) methods at about physiological (40°C) and elevated (70°C) temperatures after treatment by water or heavy water. It was shown that for the first 5 h during water exposition at 40°C the individual polymers (PHB and SPEU) and the blends kept structural stability that was confirmed by ESR time correlation data for the probe TEMPO and stable crystallinity (WAXS, DSC). Dependence of HD exchange rate on the blend content has minimum at PHB/SPEU ratio 60/40. At 70°C the watertemperature effect leads to enhanced molecular mobility of TEMPO in all systems besides the individual PHB. In accordance with DSC data in this case the crystallinity and melting points of PHBV are decreased. The description of PHBVSPEU system using a combination of structural and dynamic features gives a more complete assessment of its structural evolution at relatively short-term times, which precede its hydrolytic decomposition. Source

Zhu P.-L.,Ningbo Tianan Group Co.
Gaoya Dianqi/High Voltage Apparatus | Year: 2010

This paper introduces the working principle and technical characteristic of secondary distribution switchgear with air insulating medium, concludes that the performance of this series switchgear have greater advantages, which covering almost all areas of secondary distribution functional requirements. The practicability and usability of user-oriented design concept has also been confirmed. Source

Jian L.,CAS Shenzhen Institutes of Advanced Technology | Jian L.,Chinese University of Hong Kong | Shi Y.,CAS Shenzhen Institutes of Advanced Technology | Liu C.,CAS Shenzhen Institutes of Advanced Technology | And 4 more authors.
IEEE Transactions on Magnetics | Year: 2013

This paper proposes a novel dual-permanent-magnet-excited (DPME) machine, in which two sets of permanent magnets (PMs) are employed, one on stator and the other on rotor. Bi-directional field modulation effect (BFME) is artfully engaged to guarantee the effective coupling between the magnetic field excited by the armature windings and those excited by the two sets of PMs. Machine configuration and its operating fundaments are elaborated. Finite element analysis demonstrates that the proposed DPME machine can offer much higher torque capability than its existing counterparts, which allows it a strong competitor for low-speed large-torque applications. © 1965-2012 IEEE. Source

Ningbo Tianan Group Co. | Date: 2007-11-13

Transformers; electric switches; circuit breakers; electrical connection boxes; electrical distribution boxes; electric control panels; electric current transformer and potential transformer; electroacoustic transducers; booster units for audio devices; low voltage power regulators; high voltage and low voltage current switch gear; electrical fuses; electrical substation comprised of circuit breakers, disconnecting circuit-breaker, circuit-switchers, load break switches, electric switches, disconnector switches, electrical contactors, and electrical fuses; electronic signaling mechanism, namely a train control system used in the railway industry for detecting and controlling trains, ground faults, broken rails, power failures, track switches and lights; power station automatization device, namely, electric control panel; lightning arresters.

Zhu P.-L.,Ningbo Tianan Group Co. | Lin F.-M.,Ningbo Tianan Group Co. | Chen X.-C.,Ningbo Tianan Group Co. | Zhang Q.-W.,Ningbo Tianan Group Co. | Chen R.,Ningbo Tianan Group Co.
Gaoya Dianqi/High Voltage Apparatus | Year: 2013

The installation convenience and reliability of existing plug-in type solid insulation busbar connector are analyzed and researched and the defects are pointed. A scheme for new type plug-in solid insulation busbar connector is suggested. Some design factors on solid insulation medium, interface pressure and electric field optimization etc for solid insulation busbar are presented in order to resolve the above defects and to get satisfied result. Source

Discover hidden collaborations