时间:2019-01-14 作者:英语课 分类:VOA标准英语2015年(十一月)


英语课

Bird-friendly Bladeless Wind Turbine Mimics 1 Nature


Energy created by conventional three-blade wind turbines is cheap, sustainable and pollution-free. But according to current estimates, the devices' fast-moving blades kill up to 300,000 birds annually 2 in the U.S.


That could change with a bladeless wind converter called Saphonian, designed by Tunisian engineer Anis Aouni. He studied ancient sailboats and the movements of birds and fish to develop a parabolic dish that rotates in a peculiar 3 pattern while catching 4 the wind like a ship’s sail.


“It's like a big 'eight' in space," Aouni said. "It's a movement that we can find in nature. ... We find the same movement in fish tails when they are moving, or in birds' wings.”


The bladeless converter creates less noise than traditional wind turbines and does not suffer from the gyroscopic effect, which makes it easier to adjust to changes in wind direction. The prototype is a little more than 1 meter in diameter, but computer models show it is scalable to bigger sizes.


Aouni hopes it eventually will be able to turn 80 percent of wind energy into electricity.


“In practice, we reached 1.7 times the performance of a traditional wind turbine," he said. "Economically, it is a machine that costs much less than an equivalent wind turbine.”


Tunisian company Saphon Energy, which developed the prototype, has won several awards for the new turbine, including support from Microsoft’s initiative to help African startup companies.



n.模仿名人言行的娱乐演员,滑稽剧演员( mimic的名词复数 );善于模仿的人或物v.(尤指为了逗乐而)模仿( mimic的第三人称单数 );酷似
  • Methods:Models were generate by CT scan,Mimics software and Abaqus software. 方法:采用CT扫描,Mimics软件和Abaqus软件的CAD进行三维有限元模型的创建。 来自互联网
  • Relaxing the mind and body mimics the effect that some blood-pressure pills would have. 放松身心会产生某些降压药才能产生的效果。 来自辞典例句
adv.一年一次,每年
  • Many migratory birds visit this lake annually.许多候鸟每年到这个湖上作短期逗留。
  • They celebrate their wedding anniversary annually.他们每年庆祝一番结婚纪念日。
adj.古怪的,异常的;特殊的,特有的
  • He walks in a peculiar fashion.他走路的样子很奇特。
  • He looked at me with a very peculiar expression.他用一种很奇怪的表情看着我。
adj.易传染的,有魅力的,迷人的,接住
  • There are those who think eczema is catching.有人就是认为湿疹会传染。
  • Enthusiasm is very catching.热情非常富有感染力。
学英语单词
aarthi
acidum mefemamicum
adheres
air-cooled compensator
angiomesenteric band
anton sailer
arc welder
arrowbacks
automatic display and plotting system
ball-bearing pulverizer
bath tub curve
be a drag
beer runs
bid adieu
blackify
bord and pillar mining
by snatches
cadmium fluoride photon spectrometer
carbenarsone
carbethoxy compound
center of ossification
cercospora erythrinicola
characteristic sheet
coarse sand beach
complete atrioventricular block
crowfoot grass
cryptoporticus
deaeration
detail pen for double lines
distribution resonance
Doppler ultrasonic flowmeter
Dysontology
Egyptian water-lilies
emergency boot
endogenised
express bus stop
fattists
field erection sheet
flank-angle
Floreffe
fluoridizing
foreign policy
forever friends
glenridge
gradinos
grain size modularity
handwears
haramizes
hardened links
hieralgia
hybrid mode
hypersthenfels
indirect cailbration
jackpuddings
kadidia
kirtan
large capacity reheat turbine unit
lithophiles
loudening
lunar ring-structure
maches
Minot
nanophotonic switch
night-watchmen
noiseuses
nominal capacity of holding weight
oec ological
overdiagnosed
papilionaceum
pars tecta column? fornicis
perukier
pond bottom humus layer
prebaited
pulsed gaseous core reactor
puzzles over
quasitubular
refraction of light
resave
Sakijang Bendera, Pulau
Sarcocystis miescheriana
screw rack
screwing over
semi-demi-
shou yen ch'ang
Somrai
source-code debugger
spaced loaging
station elevation
surface-acoustic-wave filter
surfboat
Tannu Tuva People's Republic
tegmental nucleus
tejana
the Joneses
uncharactered
undemocratically
unoperable
until doomsday
video preamplifier
vortex corneal dystrophy
vortex shedding effect
wheeled stack