l*k
8 楼
吓一跳
m*i
28 楼
赞
我们环滇池转了一圈
中间刚出西山 一女生的自行车坏了 想撤
被强悍的男生修好了
中间夜宿了一夜或两夜
在湖面的另一角还能看到蓝光闪闪
那个地方好像还是郑和的故里
我们环滇池转了一圈
中间刚出西山 一女生的自行车坏了 想撤
被强悍的男生修好了
中间夜宿了一夜或两夜
在湖面的另一角还能看到蓝光闪闪
那个地方好像还是郑和的故里
b*s
40 楼
这个里面水太深了,海岸线悖论啊:
The coastline paradox is the counterintuitive observation that the coastline
of a landmass does not have a well-defined length. This results from the
fractal-like properties of coastlines.[1][2] The first recorded observation
of this phenomenon was by Lewis Fry Richardson.
More concretely, the length of the coastline depends on the method used to
measure it. Since a landmass has features at all scales, from hundreds of
kilometers in size to tiny fractions of a millimeter and below, there is no
obvious limit to the size of the smallest feature that should not be
measured around, and hence no single well-defined perimeter to the landmass.
Various approximations exist when specific assumptions are made about
minimum feature size.
For practical considerations, an appropriate choice of minimum feature size
is on the order of the units being used to measure. If a coastline is
measured in kilometers, then small variations much smaller than one
kilometer are easily ignored. To measure the coastline in centimeters, tiny
variations the size of centimeters must be considered. However, at scales on
the order of centimeters various arbitrary and non-fractal assumptions must
be made, such as where an estuary joins the sea, or where in a broad tidal
flat the coastline measurements ought to be taken. Using different
measurement methodologies for different units also destroys the usual
certainty that units can be converted by a simple multiplication.
Extreme cases of the coastline paradox include the fjord-heavy coastlines of
Norway, Chile and the Pacific Northwest of North America. From the southern
tip of Vancouver Island northwards to the southern tip of the Alaska
Panhandle, the convolutions of the coastline of the Canadian province of
British Columbia make it over 10% of the entire Canadian coastline—25,725
km (15,985 mi) vs 243,042 km (151,019 mi)[clarification needed] over a
linear distance of only 965 km (600 mi), including the maze of islands of
the Arctic archipelago.[unreliable source?][3]
百度说67公里
【在 l*r 的大作中提到】
: 百度说67公里
The coastline paradox is the counterintuitive observation that the coastline
of a landmass does not have a well-defined length. This results from the
fractal-like properties of coastlines.[1][2] The first recorded observation
of this phenomenon was by Lewis Fry Richardson.
More concretely, the length of the coastline depends on the method used to
measure it. Since a landmass has features at all scales, from hundreds of
kilometers in size to tiny fractions of a millimeter and below, there is no
obvious limit to the size of the smallest feature that should not be
measured around, and hence no single well-defined perimeter to the landmass.
Various approximations exist when specific assumptions are made about
minimum feature size.
For practical considerations, an appropriate choice of minimum feature size
is on the order of the units being used to measure. If a coastline is
measured in kilometers, then small variations much smaller than one
kilometer are easily ignored. To measure the coastline in centimeters, tiny
variations the size of centimeters must be considered. However, at scales on
the order of centimeters various arbitrary and non-fractal assumptions must
be made, such as where an estuary joins the sea, or where in a broad tidal
flat the coastline measurements ought to be taken. Using different
measurement methodologies for different units also destroys the usual
certainty that units can be converted by a simple multiplication.
Extreme cases of the coastline paradox include the fjord-heavy coastlines of
Norway, Chile and the Pacific Northwest of North America. From the southern
tip of Vancouver Island northwards to the southern tip of the Alaska
Panhandle, the convolutions of the coastline of the Canadian province of
British Columbia make it over 10% of the entire Canadian coastline—25,725
km (15,985 mi) vs 243,042 km (151,019 mi)[clarification needed] over a
linear distance of only 965 km (600 mi), including the maze of islands of
the Arctic archipelago.[unreliable source?][3]
百度说67公里
【在 l*r 的大作中提到】
: 百度说67公里
w*s
41 楼
要问海岸线的设计师。。。
coastline
observation
no
landmass.
【在 b*s 的大作中提到】
: 这个里面水太深了,海岸线悖论啊:
: The coastline paradox is the counterintuitive observation that the coastline
: of a landmass does not have a well-defined length. This results from the
: fractal-like properties of coastlines.[1][2] The first recorded observation
: of this phenomenon was by Lewis Fry Richardson.
: More concretely, the length of the coastline depends on the method used to
: measure it. Since a landmass has features at all scales, from hundreds of
: kilometers in size to tiny fractions of a millimeter and below, there is no
: obvious limit to the size of the smallest feature that should not be
: measured around, and hence no single well-defined perimeter to the landmass.
coastline
observation
no
landmass.
【在 b*s 的大作中提到】
: 这个里面水太深了,海岸线悖论啊:
: The coastline paradox is the counterintuitive observation that the coastline
: of a landmass does not have a well-defined length. This results from the
: fractal-like properties of coastlines.[1][2] The first recorded observation
: of this phenomenon was by Lewis Fry Richardson.
: More concretely, the length of the coastline depends on the method used to
: measure it. Since a landmass has features at all scales, from hundreds of
: kilometers in size to tiny fractions of a millimeter and below, there is no
: obvious limit to the size of the smallest feature that should not be
: measured around, and hence no single well-defined perimeter to the landmass.
w*r
43 楼
褒教授开始授课了?
coastline
observation
no
landmass.
【在 b*s 的大作中提到】
: 这个里面水太深了,海岸线悖论啊:
: The coastline paradox is the counterintuitive observation that the coastline
: of a landmass does not have a well-defined length. This results from the
: fractal-like properties of coastlines.[1][2] The first recorded observation
: of this phenomenon was by Lewis Fry Richardson.
: More concretely, the length of the coastline depends on the method used to
: measure it. Since a landmass has features at all scales, from hundreds of
: kilometers in size to tiny fractions of a millimeter and below, there is no
: obvious limit to the size of the smallest feature that should not be
: measured around, and hence no single well-defined perimeter to the landmass.
coastline
observation
no
landmass.
【在 b*s 的大作中提到】
: 这个里面水太深了,海岸线悖论啊:
: The coastline paradox is the counterintuitive observation that the coastline
: of a landmass does not have a well-defined length. This results from the
: fractal-like properties of coastlines.[1][2] The first recorded observation
: of this phenomenon was by Lewis Fry Richardson.
: More concretely, the length of the coastline depends on the method used to
: measure it. Since a landmass has features at all scales, from hundreds of
: kilometers in size to tiny fractions of a millimeter and below, there is no
: obvious limit to the size of the smallest feature that should not be
: measured around, and hence no single well-defined perimeter to the landmass.
x*g
55 楼
100 km!
Tour De Peninsula, Metric Century - 63 miles
http://supportparks.org/tdp/event.html
Tour De Peninsula, Metric Century - 63 miles
http://supportparks.org/tdp/event.html
w*r
56 楼
厉害,三番城里上坡下坡的,更有挑战性啊。
【在 x*****g 的大作中提到】
: 100 km!
: Tour De Peninsula, Metric Century - 63 miles
: http://supportparks.org/tdp/event.html
【在 x*****g 的大作中提到】
: 100 km!
: Tour De Peninsula, Metric Century - 63 miles
: http://supportparks.org/tdp/event.html
w*r
67 楼
说起 Lake Tahoe, 和沿着Lake Tahoe 骑自行车,让我想起了一个电影。大家猜猜是哪
一部?
一部?
w*r
69 楼
刚查了一下Lake Tahoe边上的租车的价格。好象半天一天的租才合算。山地车一天下来
40-50块钱。
http://www.olympicbikeshop.com/rentals
【在 w***w 的大作中提到】
: 有时候会到附近的岛上骑自行车,通常都是租车,就是比较差劲的车,一天才收8-20新
: 刀~~
40-50块钱。
http://www.olympicbikeshop.com/rentals
【在 w***w 的大作中提到】
: 有时候会到附近的岛上骑自行车,通常都是租车,就是比较差劲的车,一天才收8-20新
: 刀~~
w*w
70 楼
呵呵,离那里太远了~~
【在 w***r 的大作中提到】
: 刚查了一下Lake Tahoe边上的租车的价格。好象半天一天的租才合算。山地车一天下来
: 40-50块钱。
: http://www.olympicbikeshop.com/rentals
【在 w***r 的大作中提到】
: 刚查了一下Lake Tahoe边上的租车的价格。好象半天一天的租才合算。山地车一天下来
: 40-50块钱。
: http://www.olympicbikeshop.com/rentals
相关阅读