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林区道路
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  forest roads
     Sustainable development of transportation planning of forest roads in our country
     我国林区道路运输规划建设的可持续发展分析
短句来源
     The Optimum Gradient and Travelling Speed of Forest Roads
     林区道路的最佳坡度与最佳行车速度
短句来源
     Study of the effectiveness of forest roads development is aimed at optimum design of forest roads.
     林区道路开发伸长效率的研究旨在解决林道的优化设计问题。
短句来源
     Based on the sustainable development principles of forest roads planning, this paper presented the necessary change on the road planning in northeast forest on the basis of analyzing problems in the previous forest roads planning theory, the forecast of forest economy development, the change of road function, presented the principles of road planning and references to solve the problems according to the principles.
     基于林区可持续发展战略的高度,从东北林区道路规划理论、林区经济发展预测、道路功能转变的角度, 分析了东北林区道路规划理念转变的必要性,提出林区道路规划指导原则,为解决东北林区道路规划问题提供参考。
短句来源
     EFFECTIVENESS OF DEVELOPMENT OF FOREST ROADS
     林区道路开发伸长效率的研究
短句来源
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  forest road
     A STUDY OF DYNAMIC MODEL FOR FOREST ROAD NETWORK SYSTEM
     林区道路网系统动态模型的研究
短句来源
     The Necessary Change of Northeast Forest Road Planning
     浅谈东北林区道路规划思想转变的必要性
短句来源
     The economical annual amounts of traffic of the main and branch line of forest roads were deduced by using the surplus of transportation expenses of the main line to make up with the increasing of construction expenses according to that the annual freight volume of the main line was higher than that of the branch line, and the construction expenses of the main line was higher than that of the branch line in forest road network.
     根据林区道路网中的干线林道年运量大于支线林道年运量、干线林道的修建费比支线林道修建费高、干线林道运输费比支线林道运输费低的关系,用干线运输费的节省来补偿修建费的增加,推求干、支线林道的经济年运量。
短句来源
     In view of the maintenance manage ment of forest road by sections and by stages, the optimization model for maintenance planning is established, The theory of dynamic programme is applied in order to achieve the best overall and long-term benefit of maintenance and utilization.
     本文应用动态规划原理,针对林区道路系统的分段分期养护管理,建立了养护规划的优化模型,以期取得长远的养护和运营最佳总体效益.
短句来源
  forestry road
     Making Full Use of Assets Inventory of Forestry Road ,Proforming Various Management and Construction
     盘活林区道路资产存量 实行多元化管理与建设发展的思考
短句来源
  “林区道路”译为未确定词的双语例句
     Reasons and prevention measures of road washout
     乐都林区道路水毁原因浅析及防治措施
短句来源
     Optimal Selection Method of Road Line Schemes in Forest Areas by Using GIS Technique
     基于GIS技术林区道路选线方案优化方法的研究
短句来源
     Causation and prevention of road frost heave in forest section
     对林区道路翻浆的原因分类及处治探讨
短句来源
     The DTM established within this subsystem can be used in image processing of remote sensing, classification of vegatation, stratification of site condition, map-making of slope and aspect. It can also be used in selecting road, quantity calculation of earthwork, selecting location of reservoir, calculation of dam height and capacity of reservoir, disaster estimation of floodwater and so on.
     由本系统建立的数字地形模型可广泛用于遥感图像处理、植被分类、立地条件划分、坡度和坡向图制作,也可用于林区道路选线、土石方计算、水库选址和坝高与库容计算及洪水危害估计等方面。
短句来源
     On the basis of system dynamics, a dynamic model for the forest roadnetwork system has been constructed, and used to perform a simulationtest for the real system of a forestry bureau.
     本文运用系统动力学原理,建立了林区道路网系统的动态模型,并以某林业局真实系统为背景,对该模型进行了仿真实验。
短句来源
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  forest roads
Forest roads in high elevation area were also used as the passages for illegal captures.
      
The maps can be used as a decision support tool in forest planning involving the maintenance, obliteration or development of new forest roads in steep mountainous terrain.
      
Later they were transported by trucks on the forest roads to the conversion-site.
      
Modeling spatial variability in the life-cycle costs of low-volume forest roads
      
Minimizing total costs of forest roads with computer-aided design model
      
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  forest road
Nesting preferences discovered for the nest tree and its surroundings, included height and diameter of trees, age of the forest stand, distance to the nearest open area or forest road and occurrence of open areas in the vicinity of the nest.
      
At another site there was a higher frequency of infected colonies near a forest road than further into the stand.
      
Due to the road and forest road construction in the habitat of Korean musk deer, the musk deer habitats were fragmented and lost.
      
Influence of forest road on breeding of tits in artificial nest boxes
      
It is concluded that varied tit were most significantly influenced by forest road, followed by great tit, whereas marsh tit were not influenced by forest road.
      
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  forestry road
The 16,000?m3 debris flow buried approximately 7.5?ha of second-growth trees, buried approximately 500?m of a forestry road, and reached two fish-bearing streams.
      
The water flood eroded approximately 240?m of the same forestry road and plugged four culverts before overtopping and inundating the road.
      
The elements at risk that were analyzed included, in order of priority: users of the forestry road, the fish-bearing streams, the forestry road itself, and a timber bridge.
      
Examples of the time histories obtained using the agricultural tractor on the forestry road are shown in Figure 2.
      
One hundred percent of forestry road building costs are now borne by industry.
      


In this paper, the author studied the economy of logging truck and trailer which has different fuel consumption for different roads in forest region and provided a new criterion of the fuel consumption and its influence factors. On the basis of a new economic criterion, Kg/100Km·t has been presented and compared to that of the old criterion, Kg/100Km.The paper provides a basic formula which can be used to calculate the consumption and the norm of logging trucks and trailers which transport logs on the different...

In this paper, the author studied the economy of logging truck and trailer which has different fuel consumption for different roads in forest region and provided a new criterion of the fuel consumption and its influence factors. On the basis of a new economic criterion, Kg/100Km·t has been presented and compared to that of the old criterion, Kg/100Km.The paper provides a basic formula which can be used to calculate the consumption and the norm of logging trucks and trailers which transport logs on the different roads for improming the management of logging company and increasing the logging operations.Some of suggestions are presented so as to increase the coefficient of distance and load utilization, to decrease the fuel consumption of logging trucks and trailers.

本文分析研究了运材汽车燃料经济性评价指标及其主要影响因子,在道路试验和理论分析的基础上提出了“百吨公里”新油耗指标和计算式,并与旧指标相比较。单车《百吨公里》油耗指标为Qv=10.75kg/(100km·t),拖挂为Qv=4.82kg/(100km·t);而原指标各为Qs=21.5kg/100km和Qs=29.5kg/100km。显然,新指标具有明显的经济性和生产性,有利于提高企业管理水平和生产能力。计算式可用来进行不同等级林区道路的油耗计算;提出了一些方法措施,以提高新指标的里程利用系数和载重利用系数,降低燃油耗量,节约能源。

Digital terrain model (DTM) is an important component of a resource information system. The DTM with netted texture has the advantage of fixed position and altitude. It has many uses. This paper described in detail the principle and method of altitude data extraction, slope and aspect data calculation, change of net density, establishment of terrain model and three dimension map-making. The function of the DTM subsystem under microcomputer environment was also introduced. The DTM established within this subsystem...

Digital terrain model (DTM) is an important component of a resource information system. The DTM with netted texture has the advantage of fixed position and altitude. It has many uses. This paper described in detail the principle and method of altitude data extraction, slope and aspect data calculation, change of net density, establishment of terrain model and three dimension map-making. The function of the DTM subsystem under microcomputer environment was also introduced. The DTM established within this subsystem can be used in image processing of remote sensing, classification of vegatation, stratification of site condition, map-making of slope and aspect. It can also be used in selecting road, quantity calculation of earthwork, selecting location of reservoir, calculation of dam height and capacity of reservoir, disaster estimation of floodwater and so on.

数字地形模型(DTM)是资源信息系统中的重要组成部分。以格网方式建立的地形模型具有定位及定量化的优点,用途很广。本文详细介绍了DTM中数据采集、坡度和坡向数据的计算、格网的加密、地形模型的建立和三维立体绘图的原理和方法。并对在微机环境下建立的DTM的功能做了系统介绍。由本系统建立的数字地形模型可广泛用于遥感图像处理、植被分类、立地条件划分、坡度和坡向图制作,也可用于林区道路选线、土石方计算、水库选址和坝高与库容计算及洪水危害估计等方面。

On the basis of system dynamics, a dynamic model for the forest roadnetwork system has been constructed, and used to perform a simulationtest for the real system of a forestry bureau. The results indicate thatthe developed model is accurate and effective, providing a theoreticalbasis for the decision-making of preparng the construction plan of forestroad network, and coordinating the development project of forestryproduction.

本文运用系统动力学原理,建立了林区道路网系统的动态模型,并以某林业局真实系统为背景,对该模型进行了仿真实验。结果表明,所建模型正确有效,能为制定林道网建设计划及其与林业生产协调发展的规划,提供决策的理论依据。

 
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