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In order to meet the material demand of subgrade filling in the South Yellow Sea coastal area, where the soils are mainly from the hydraulic reclamation of land from the sea, a lot of laboratory experiments were conducted to evaluate the engineering properties such as salinity content, particle composition, limited water content, compaction characteristic, capillary water characteristic, resilient...
TiO 2 with NIR-absorption and visible upconversion luminescence (UC-TiO 2 ) is prepared by a sol–gel method and calcined at 700°C for 6h. The material broadens the response region of dye sensitized solar cells (DSSCs) from an ultraviolet–visible region to the whole region of the solar spectrum. It shifts NIR sunlight to visible light which matches the strong absorbing region of the...
The hybrid Kevlar/PTFE (polytetrafluroethylene) fabric composite was prepared by impregnating of Kevlar/PTFE fabric in phenolic resin containing nano-alumina and the successive curing. To investigate the effects of nano-alumina on the tribological properties of the fabric composite, wear tests were performed on block-on-ring friction and wear tester. The tensile properties of the composite was evaluated...
The global energy crisis and environmental concerns have been significantly increasing the pressure for cleaner and more efficient generation of electricity. With the social economic development, power supply and demand keeps on increasing. For sustainable developing, the power industry has actively developed the renewable energy while raising the utilization efficiency of conventional energy in China...
This paper provides a PTFE/LSEG solid self-lubricating composite that exhibits very low friction coefficient and wear rate. In present study, the influences of the content of expanded graphite with nanoscale lamellar-structure (LSEG) in PTFE/LSEG composite on tribological properties were carried out. Six compounds of PTFE with LSEG (0-30 wt. %) were evaluated on MMU-5G friction and wear tester. The...
This paper adopts a main circuit structure with back-to-back PWM converter, in which generator-side using direct torque control method, and grid-side adopts three-phase VSR inner current decoupling control based feed forward control algorithms, and this paper proposes an improved MPPT control methods, which can achieves more quickly and effectively tracking the maximum power. Finally, the effectiveness...
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