查询词典 overlay

The sixth part: Studies on the dynamic changes of soil retention function value of ecosystem in YUYANG District. Utilized ERDAS8. 5 to interpret the remote sensing image and get LUCC data and vegetation information of YUYANG District. Utilized R2V5. 5 to digitize administrative map, topographic map, vegetation picture, soil distribution map and meteorological website map. Utilized ARCINFOR8. 3 to change every digitization layer to the same projection, to generate Tyson polygon, to structure DEM and do vector polygon overlay. Utilized ARC VIE W3. 3 to obtain the grid data topographic slope and slope length from DEM data of YUYANG District, and then, turned every coverage layer into grid layer and do grid polygon overlay to gain data about dynamic changes of value of soil retention of ecosystem in YUYANG District, at last, the author analyzed the features of the spatial-temporal changes and its reason.The seventh part: Studies on the dynamic changes of fixing drifting sand against wind function value of ecosystem in YUYANG District.

第六部分：榆阳区生态系统土壤保持功能价值动态变化研究；利用ERDAS8.5对遥感数据进行解译获得榆阳区土地利用数据和植被信息，利用R2V5.5数字化榆阳区政区图、地形图、植被图、土壤分布图及气象站点分布图，利用ARCINFOR8.3对各数字化图层进行投影转换、泰森多边形生成、DEM构建和叠加分析，利用ARCVIEW3.3从DEM数据中获取榆阳区的坡度、坡长面域数据，并将上述各图层格网化，然后通过栅格图层叠加分析和代数运算获取榆阳区生态系统土壤保持功能物质量和价值量时空动态变化数据，最后分析了其变化的时空特点及形成原因。

As compared to a tree-based overlay, the playback continuity of DONet is much better, particularly under highly dynamic environments, and its end-to-end delay is comparable to that of the tree-based overlay.

相比较树结构覆盖层，DONet的播放流畅性好得多，尤其是在高动态环境下，同时端对端的延时也比得上树结构覆盖层。

Furthermore, through the hardness test for weld overlay and hend test, effect of Al content in weld overlay on mechanics performances, especially ductility is investigated.

此外通过堆焊层硬度的测试和弯曲试验，对堆焊层中铝的含量对其力学性能，特别是塑性的影响作了分析。

Beijing environmental problems hold severe, and atmospheric and water pollute, soil and water loss, hot island and yawp are leading problems,and take on territorial characteristic. Based on research on relativity between urban forest and these environmental problems, urban forest can effective improve environmental quality in Beijing. And for the aim of improve environmental quality, Beijing forest overlay should attain 35% at least in citywide range, and local-areas being severe environmental problem should be provided with higher forest overlay.5. Through the study on urban forest needed capacity, Beijing's forest coverage is up to par in citywide range, but montanic forest coverage, plain covered with trees and average forest area are lacking, and CO2 and O2 balance is incapable;form the point of heat and balance CO2 and O2 balance,urban forest the city zone and suburb is lack. There is urban forest developmental potential space,but the city zone and suburb area need be compensated form urban forest in circumjacent region.6. On the based of the above results and ecological network system, the author drived whole region into city area, plain and mountain area are needed at the point of planning thoughts of running-through forests and water .

根据城市森林与北京市主要环境问题的相关性分析，城市森林在改善这些环境问题中具有重要的作用，为有效改善这些环境问题，整个北京市域范围内森林覆盖率至少达到35%，并且分布比较均匀，环境问题严重的局部区域需要不同程度增加森林覆盖率。5、通过对北京市城市森林需求量研究发现，虽然在市域范围内北京森林覆盖率达到了国家标准，但是山区森林覆盖率、平原林木覆盖率、城区人均森林面积不足；从区域热平衡和碳氧平衡角度分析，城区和郊区不能满足本区域的城市森林需求量，虽然北京市城市森林具有一定的发展潜力，整体上基本可以满足城市需要，但是这些区域需要依靠周边区域城市森林的补偿。6、根据以上的研究结果，以中国森林生态网络体系建设的点、线、面布局理念为指导，以&林网化——水网化&作为优化理念，将北京市整个市域划分为城区近郊区及其辐射区域，平原区和山区三大区域，依据三大区域特点进行城市森林布局优化。

In this paper,the mechanical properties of the old PCC pavement structure overlaid with AC was analyzed with ANSYS,a software for finite element analysis,and the influence of interlayers,depth of AC-overlay and modulus of AC-overlay was taken account.According to the study it could be concluded that in order to retard the reflective cracking the interlayer should be put below the overlayer and the interlayer of high modulus can take effect well.

结合试验路实体工程，采用有限元方法分析了土工布、玻璃纤维网对旧水泥混凝土路面沥青混凝土加铺层复合式路面结构的内力影响，发现为防治旧PCC路面的接缝/裂缝在AC加铺层内产生反射裂缝，宜在加铺层底部铺设夹层，且模量较大的玻璃纤维网效果更好。

The semiconductor nanocrystalline surface is modified by using organic overlay method. As an organic overlay,-methacrylic restrains the reuniter between the grains in the latter process. Furthermore, it can combine with empty bond of atom at grain surface state and eliminate the surface state.

应用有机包覆的方法对纳米颗粒进行了表面修饰，作为包覆剂的α-甲基丙烯酸有效抑制了后处理工艺中纳米颗粒间的团聚现象，在纳米颗粒表面形成帽层，并与粒子表面态的原子悬键进行配位，这对消除表面态是非常有益的。

To use it, just create an instance of the Overlay Class, set your Size and Position, Add your RenderDelegate, Initialise and Update the overlay.

为了使用它，只需创建一个覆盖类的实例，设置您的大小和位置，添加您的RenderDelegate，初始化和更新的覆盖。

To accommodate the current situation that nodes can frequently join and leave the overlay session, this paper presenta a load balancing algorithm based on the link available bandwidth. This algorithm utilizes the known knowledge of the physical topological structure, chooses the routing path that has the least effect on the available bandwidth among multiple routing paths, so as to obtain a lightlyloaded overlay edge.

针对节点频繁地加入和退出覆盖会话的现状，本文设计了基于链路可用带宽的负载均衡路由算法LBR，利用已知的物理拓扑知识，在多条路由路径中选择一条对网络可用带宽影响最小的路由路径，得到轻负载的覆盖边。

To accommodate the current situation that nodes can frequently join and leave the overlay session, this paper presenta load balancing algorithm based on the link available bandwidth. This algorithm utilizes the known knowledge of the physical topological structure, chooses the routing path that has the least effect on the available bandwidth among multiple routing paths, so as to obtain a lightly-loaded overlay edge.

针对节点频繁地加入和退出覆盖会话的现状，本文设计了基于链路可用带宽的负载均衡路由算法LBR，利用已知的物理拓扑知识，在多条路由路径中选择一条对网络可用带宽影响最小的路由路径，得到轻负载的覆盖边。

There has been three overlay design methods at present: effective thickness method, deflection method and mechanics-experience method. It was not considered that asphalt mixture affected reflective cracking and overlay thickness.

目前加铺层设计一般有三种方法：有效厚度法、挠度法和力学—经验法，这些方法都没有考虑沥青加铺层中材料本身对反射裂缝的贡献以及对厚度设计的影响。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。