没有卫星就意味着我们无法算出行星的密度,于是测量也就凝滞不前了.
No moon means we can't work out the density of the planet, so the whole thing grinds to a halt.
居民每次出行的总时间一般包括城市干路内的时间和干路所围合的街区内的出行时间，合理的干路网密度应当使二者之和最小。
The total trip time enclose the time used in block and out of block, reasonable density of road network should make the total trip time to be least.
根据土地利用、人口密度和公交站点覆盖率确定各交通区的公交分担率，得出交通区公交出行量，再应用最大熵原理进行公交出行分布预测。
According to the land use, population density and coverage percentage of the public transport station, the sharing of public transport among traffic zones and their travel demand can be determined.
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