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速度密度关系
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速度密度关系
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交通流模型
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velocity-density relation
速度密度关系
速度与密度呈现线性关系。当密度从零逐渐增大,则车速从自由流速度逐渐减小;密度达到最佳密度时,车速为流量最大时对应的速度(最佳速度);当密度达到阻塞密度时,车速为零,交通阻塞。
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Local Government Act(1929)
local government agreement
local government annexation
local government debt
Local Government in China Under the Ch’ing
local government-run school
local governments' and public schools' primary responsibility for children's education of rural migrant workers
local government–run school
local ground field
Local Group
local group
Local group of galaxies
local group of galaxies
local group theory
local heat treatment
local height
local height machine
local helioseismology
local hidden variable
local homeomorphism
local homology
local homology group
local homomorphism
local hour-angle
local household registration of migrants
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