Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Lanchuan Zhang"'
Publikováno v:
BMC Public Health, Vol 24, Iss 1, Pp 1-13 (2024)
Abstract Background As life improves and sedentary time increases, young children's physical fitness gradually declines. Methods Multi-stage stratified whole cluster sampling was utilized to sample 5584 preschoolers. Young infants' morphology, functi
Externí odkaz:
https://doaj.org/article/5a4665429cb043c8ab85c40fbac4bae1
Publikováno v:
Renewable Energy. 156:290-302
The combination of solar array and rechargeable battery is the main trend of energy system for scientific balloon station-keeping, when the performances of station-keeping strategies are evaluated, energy problem should be considered. In this paper,
Publikováno v:
Acta Astronautica. 167:245-259
The high-altitude airships have great potential in military and civilian applications with the advantages of long endurance and low operating costs. Solar energy, which can be converted into electrical energy through photoelectric cells, plays an imp
Publikováno v:
Energy. 183:1089-1103
Solar energy is an essential energy source collected by photovoltaic (PV) cells for long-endurance stratospheric airships. Attitude control is crucial for the energy production of the PV array attached to the airship hull. This study was conducted to
Publikováno v:
Aerospace Science and Technology. 92:644-652
Station-keeping endurance of high altitude balloon is the foundation of the assignments of environmental monitoring and communicational relaying. Exploiting the natural wind-field that varies with altitude by the altitude control system to extend the
Publikováno v:
Energy Conversion and Management. 185:44-54
This paper presented a multidisciplinary optimization methodology of a high altitude solar-powered hybrid airship. A multidisciplinary model of the hybrid airship is proposed including the geometry, aerodynamics, structures, propulsions and energy co
Publikováno v:
Aerospace Science and Technology. 86:1-10
For the absence of the propeller system to resist wind load, the balloon will float everywhere with unstable position. In order to fix the balloon within a specific district and extend the station-keeping endurance, an effective approach that utilize
Publikováno v:
Acta Astronautica. 152:727-739
Energy management system is very critical for solving the energy problem of a long endurance stratospheric airship. But the researches about the energy management system and energy management strategy for a stratospheric airship are rare. This paper
Publikováno v:
Renewable Energy. 125:796-805
The efficiency of solar cell is a critical problem to the energy management of high-altitude airship. Excessive temperature and solar radiation intensity of solar cell will reduce the cell efficiency. The main purpose of this study is to increase the
Publikováno v:
Solar Energy. 170:1-13
The output performance of solar array on near-space airship can be effectively improved by the layout optimization of solar array. This paper studied the effect of layout parameters on output energy of solar array on the airship with and without ther