traffic density 中文意思是什麼
traffic density
解釋
車流密度-
Sichuan lands in the west of our country, pass through for the west of our country, expressway general development is stated, reach the west china traffic major problem of building existence : traffic facility amount serious is below, density passes low, traffic demand product is exceptional ; traffic facility overall quality is low ; technical standard is not high ; traffic facility disease is serious ; it is weak to fight calamity ability ; traffic structuralness contradictory very outstanding, big medium or small proportion structure is not reasonable ; traffic technical structure is not enough perfected ; traffic regional structure do not let reasonable etc.
四川地處我國西部，通過對我國西部高速公路發展的概述，得出了西部交通建設存在的主要問題:交通設施總量嚴重不足，密度過低;交通需求缺口過大;交通設施總體質量過低，技術標準不高;交通設施病害嚴重，抗災能力薄弱;交通結構性矛盾十分突出，大中小型比例結構不合理;交通技術結構不夠完善;交通區域結構不盡合理等。造成這些現象的原因何在，筆者從我國近年來公路建設的政策背景出發，得出的結論主要是建設資金缺口過大。那麼，四川省高速公路建設中存在的問題又是什麼 -
The length of railways in operation is an important indicator to show the development of the intra ? structure for the railway transport, and also the essential data to calculate volume of passenger freight transport, traffic density and utilization efficiency of the locomotives and carriages
鐵路營業里程是反映鐵路運輸業基礎設施發展水平的重要指標，也是計算客貨周轉量、運輸密度和機車車輛運用效率等指標的基礎資料。 -
Second, we introduce a two - lane traffic model which is based on the ( 0, 2 ) and ( 0, 1, 2 ) models. we mainly study the coupling effect of lanes. in two - lane traffic, vehicles can change lanes and overpass. the interactin between lanes is considered as coupling effect. the computer simulation indicate that ( dthe current of the system with cupling is greater than that without coupling ; 0for a certain initial density, the average flow and speed are indepent on the coupling coefficient which is greater than zero ; when the initial densities ( speeds ) of lanes are different, the characters of traffic system will be different
在單車道模型的基礎上，建立v _ （ max ） = 2雙車道模型，研究車道的耦合效應。雙車道模型中車輛可以進行轉道、超車，兩道之間有耦合作用。模擬結果說明，有耦合時系統的流量比沒有耦合時大；在固定的初密度條件下，只要耦合系數b 0 ，兩道間的耦合強弱對流量和速度無影響；兩道初密度分佈不均勻和速度分佈不均勻都能使交通系統特性發生變化。 -
The highway traffic mileage is 10, 200 km, the density being 64. 3 km per hundred square km, exceeding the average of the province
公路通車里程1 . 02萬公里，每百平方公里通車里程64 . 3公里，超過全省平均水平。 -
By analyzing and comparing the network feature index - non - beeline coefficient. shortcut index. joint degree index, demonstrates the cobweb theory that in the conditions which has the same area. scale and density, round - radiation network has the best traffic efficiency
基於對路網特性指標? ?非直線性系數、快捷性指數、連接度指數分析比較的基礎上，提出並論證了在同等的路網覆蓋面積、規模和密度的條件下，環形放射式路網具有最優的交通效率的蛛網理論。 -
When the model is applied to traffic flow without overtaking flow, the flow - density relationship is obtained
將模型應用於無超車換道交通流，求出了流量和密度之間的關系。 -
By using the improved gravity model and gray theory model, the essay makes forecast analysis on future passenger traffic volume of shjiazhuang - taiyuan passenger - dedicated line from three aspects, including passenger flow of local line, passenger flow originating from other railways and induced passenger flow, and using gdp and population density of surround cities along the passenger corridor, the passenger traffic volume on existing line of shijiazhuang - taiyuan passenger corridor and the weighted operation time between cities as impact factors respectively
摘要利用改進的重力模型和灰色理論模型，從石太客運專線的本線客流、跨線客流和誘增客流3個方面，分別以客運通道周邊城市的gdp和人口分布密度、石太客運通道既有線的旅客運輸量、城市間的加權運行時間為影響因子，對石太客運專線的旅客運輸量進行預測分析。 -
The vessel accidents happen occasionally with traffic density increasing greatly due to a mount of vessels navigating in port, as well as the development of ship ' s amount and types and tonnage becoming larger and larger with the development of the shipment
隨著海運業的發展，海上航行船舶數量、類型和噸位都發生了巨大的變化，大量的船舶頻繁活動于港口和海上交通要道，使港口等水域通航密度大為增加，重大海上交通事故時有發生。 -
As the modern highway transportation characterized with high speed, high traffic density, heavy load and channelized traffic, the technology of asphalt pavement have been changed greatly and many methods had been developed to improve the performance of asphalt pavement, such as the superpave ?, the technology of modified asphalt, the sma, etc. among them, the fiber strengthened asphalt pavement is a successful alternative both domestically and overseas
為了適應現代交通速度快、交通密度大、軸載重、渠化交通明顯的特點，瀝青路面技術發生了較大的變化，高性能瀝青路面superpave ~ （ tm ） 、改性瀝青技術、 sma等得到了應用，而纖維瀝青路面以其技術性能優良、經濟上合理等特點受到人們的關注，具有廣闊應用前景。 -
Based on these models, a main - road traffic flow model with two speeds on one dimension is designed. this model simulate the situation of one road in the city, traffic lights placed on the crossing, using the computer simulation, firstly, in the case of synchronized traffic lights, we investigated the velocity and flow of the model when the initial density, the turning probabilities, the number of the traffic lights, the green to signal ratio and the period of the signal are changed, then we have advanced some meliorate measure to traffic flow ; secondly, in the case of the traffic lights " signal update delay in turn, we found the optimal matching between the period of the signal and the delay time of the traffic lights so as to the perfect velocity and the flow of the model are attained
在此基礎上，建立了一維二速主幹道模型，該模型模擬了城市交通中一條主幹道的交通情況，在交叉口處設置紅綠燈，通過計算機模擬，首先，在交通燈信號同步更新的條件下，研究模型在改變車輛的初始密度、轉向概率、交通燈個數、紅綠燈信號的綠信比、紅綠燈信號周期等各種情況下主幹道的速度、流量的變化，根據模擬結果提出一些改善交通的有效措施；其次，在交通燈信號依次延遲更新的條件下，研究模型在參數道路長、紅綠燈綠信比、交通燈個數、車輛的初始密度給定的情況下找到紅綠燈信號周期和延遲時間的最佳匹配使得主幹道的速度、流量達到最理想的值。 -
From the viewpoint of macro dynamic characteristics of freeway traffic flow, this paper classifies the freeway, gives a nonlinear macro dynamic traffic flow model of freeway using density and speed as state variables and then identifies the parameters by using searching approach step by step, finally gives an identification instance
摘要從高速公路交通流的宏觀特性和動態特性出發，對高速公路進行了兩級分段，以車流密度和車流速度作為狀態變量，給出了高速公路非線性的宏觀動態交通流模型，進而採用直接搜索法對模型中的參數進行了分段辨識，並給出了辨識實例。 -
First, a locating and ranking algorithm, based on theory of constraints ( toc ), is put forward. then, other methods aimed at different traffic measures of effectiveness are respectively advanced, which are the capacity method, delay method, speed method, investigation vehicle method, queue length method and density method respectively
文章首先提出了基於約束理論（ toc ）的瓶頸定位與排序方法，然後針對具體的指標提出了通行能力法、延誤法、速度法、調查車法、車輛排隊長度法、密度法等六種方法。 -
With expeditiously development of national economy, construction of road traffic are becoming more important. due to the increase of tunnel " s length and quantity, and the increase of density of road traffic, fatalness of fire in a roadway tunnel are raising gradually
由於隧道數量和隧道長度以及公路交通密度的日益增長，以及隧道內火災特性的特殊性，公路交通隧道內火災的危險性呈上升趨勢，因此，特長公路隧道內火災的安全性顯得至關重要。 -
With expeditiously development of national economy, construction of road traffic with security and comfortable circumstances are becoming more important. due to the increase of tunnel ' s length and quantity, and the increase of density of road traffic, fatalness of fh - e in a roadway tunnel are rising gradually
隨著隧道數量和隧道長度以及公路交通密度的日益增長，公路隧道內火災事故發生率以及危害的不斷擴大，為隧道提供安全、可靠、舒適的運營環境越來越受到各國專業人士的重視。 -
We got the spatial distribution map of population density by spatial interpolation, in which the population data are distributed on the grids. the results of the distribution of interpolated based on gis is closed to a real population distribution. the combination of the spatial interactive models and a shortest path algorithm for public transit network is analyzed by supermarket ' s accessibility based on pedestrianism and public transit. this methods may be used to investigate potential supermarket ' s locations. the quantitative analysis about the supermarket ' s market area is realized based on trade mode of lashmanan and hansen, which mainly includes spatial distribution of population, traffic accessibility and free competition between different firms
文中應用空間內插技術實現了人口數據空間分佈化，將人口數據通過空間插值分佈於研究區域內，使人口空間分佈更接近實際；應用公交最短路徑演算法及空間相互作用模型實現了基於步行和公交出行的超市可達性，將交通對超市選址的影響定量化，方便了方案的比選；在綜合考慮人口空間分佈、超市交通可達性、現有零售商業競爭態勢的基礎上，基於拉、漢購物模式實現了超市商圈定量分析。 -
We also analyze the influence of the boundary condition 、 safety distance and deceleration probability to the traffic flow. finally, we propose an crossroad modle. this model is made up of one main road and one branches ： traffic with lights placed on the crossing, vehicles " breaking while running and turning to other direction while jamming. we investigate the velocity and flow of the model when the initial density, the brake and turning probabilities, the green to signal ratio are changed. then the reasons causing all the kinds of phenomena are analyzed
最後研究了周期性邊界條件下的十字路口的ca模型，該模型由一條主幹道和一條支道組成，在幹道與支道的交叉路口設置紅綠燈，車輛在運行中對突發事件發生反應的剎車，路口的車輛可以轉向等各種實際交通行為，並通過計算機模擬，研究模型在改變車輛的初始密度、剎車概率、轉向概率、紅綠燈信號的綠信比等各種情況下支、主幹道車輛的速度、流量的變化，並分析在各種情況下交通狀況的成因，提出改善交通的有效措施。 -
Secondllv in the 1 d random traffic flow model. the relation function between the correlation and the creation. disappearance. brake probabilities of the vehicles is presented. according to the statistical mechanical approach to the spatial correlation functions. the theoretical results agree with that of the computer simulation. thirdh. based on the bml model. a main - road traffic flow model with two speeds on two dimensions is designed. this model simulate the traffic situation of one main road and several branches in the cit traffic lights placed on the crossing. vehicles breaking ~ vhile running and turning to other direction while jamming. we investigate the ~ ' e1ocitv and flo ~ ~ of the model when the initial densitvthe brake and turning probabilities. the green to signal rati3. thc number of the branches and the period of the signal are changed. then the reasons causing all the kinds of phenomena are analvzed. finallv. we simulate the bml model using the method of lattice boltzmann which ~ vas brought out by liu mu - renand obtain the velocity - density graph similar to the previous result. the upper critical densiw above which there are oniv jamming configurations. and the lo ~ ver critical density below which there are only moving configurations are the same as before. the boltzmann function which is on the lattices shows the moving and jaxmning transition obviouslv. thus it proves the possibilit of this method on the traffic research
接著，建立了和研究了二維二速的主幹道模型，該模型模擬了城市交通中一條主幹道，多條支道的交通情況，在幹道與支道的交叉路口設置紅綠燈，車輛在運行中可以有對突發事件發生反應的剎車，在發生堵塞時，路口的車輛可考慮通過轉向來緩解交通等各種實際情況的發生，給出了車輛演化的演化方程，並通過計算機模擬，研究模型在改變車輛的初始密度、剎車概率、轉向概率、支道數、紅綠燈信號的綠信比、紅綠燈信號周期等各種情況下支、主幹道車輛的速度、流量的變化，並分析在各種情況下交通狀況的成因，提出改善交通的有效措施。最後，在劉慕仁提出的用格子boltzmann方法研究一維決定論交通流的思路下，將此法推廣到對二維bml模型的模擬上，得到了與用以往方法的研究結果相類似的速度-密度圖線，且車輛從運動相到堵塞相轉變的上下臨界密度是一致的，同時分別給出車輛在處于暢通相和堵塞相時， boltzmann函數在格子上的分佈情況，進一步驗證了此法的可行性。 -
In the period of the ninth five year plan, shanwei continued to reinforce investment in the construction of infrastructure facilities. in 2001, the traffic mileage was 3097. 7 km, the highway density was 64 km hundred sq
郵電通信方面， 2000年全市電話交換機容量40 . 15萬門，開通了14萬戶移動電話和20多萬戶無線電傳呼，進入全國通信「百強市」行列。 -
The boundaries had sufficient capacity to offer and hold the vehicles that moved in or out. the density of vehicles would tend to a certain stable value with the acceleration of time step, which could reflect that the urban traffic had appropriate capacity
周邊有充分能力提供和接納出、入車輛，車輛密度將會隨著時間步的增多趨向某穩定值，以反映城市的交通存在某適宜的容量。 -
We discuss the new highway model and intelligent control method. we model the urban highway traffic flow and design a multi - variables control strategy with both the on - ramp control and the road speed control by the ann technique. the developed adaptive neural controller is to control the traffic density and force it to follow a desired one
利甩人工神經網路技術建立了城市間高速公路的神經網路模型?並提出了入只匝道放行和路段速度控制相結合的多變量神經網路控制策略，利用診珍制策略建立的自適應神經網路控制器，可以使高速公路上的密度維持在理想值附近。
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