查询词典 vegetation

The paper chooses twenty-five key meadow sample plots in the Loess Plateau, then discusses the estimation model and estimation method of vegetation coverage by the pictures taken by the digital camera, and puts forward the effective solution for edge distortion problem caused by the central projection and vegetation information recognition problem.

该文选择黄土高原退耕还林还草区野外测量的25个典型样方，探讨了数码照相法估算植被盖度的模型和方法，提出了中心投影引起的边缘畸变问题和植被信息识别问题的有效解决方案。

Recently , Ecological restoration is the pop discussion all along ,riparian vegetation can prevent slope by corrasion ,but others put forward that vegetation will recede the watercourse's capability of flood discharge .

近年来，生态修复一直是学者探讨的热门课题，河岸种植植被能固滩固岸，保护岸坡不受侵蚀，但也有专家提出植被会降低河道的泄洪能力。

Soil respiration response to different stages of vegetation restoration was determined via closed system measurements of carbon dioxide and selected factors affecting the correctitude and sensitivity of soil respiration. Eight different soil samples under different vegetation restoration stages were separately collected at 0~20 cm and 20~40 cm soil depth in spring and summer and both fresh and air-dried samples analyzed.

为探讨黄土丘陵区草地植被自然恢复过程中土壤微生物活性的变化特征及其影响因素，采用"时空互代"法采集宁夏云雾山自然保护区8个不同植被恢复年限的春、夏两季0~20cm和20~40cm的土样，用室内密闭静态培养－碱液吸收法测定了新鲜和风干土样的基础呼吸。

In doing so, we have gotten these objects:(1)built the relationship between natural vegetation pattern of china and the climate,based both on Kira-index and dry/wet index;(2)built the phenology model describing main natural vegetation types of china,based on degree-day;(3)built the drought sensitivity function for main vegetaion types of china; and (4)integrated the drought sensitivity function with the PDSI.

在执行过程中我们基本上按照项目计划书的原初设计完成了如下的工作：①采用Kira的生物热量指数与生物干湿指数相结合的思想，建立了中国自然植被的空间分布与气候因素之间的数量关系；②利用有效积温与生育期之间的关系，建立了自然植被主要类型的物候模型；③根据文献中的实测资料建立了主要农作物类型、自然植被主要类型的缺水敏感性指数；④将此缺水敏感性函数代入Palmer干旱强度指数的计算模型之中。新的干旱强度指数计算步长为周(7天)。

How to assess quantitatively the desiccation of deep soil layer is of great importance to determine the reasonable vegetation type and density and guarantee vegetation rehabilitation.

如何定量评价深层土壤的干燥化程度，有助于确定适宜的植被类型和密度，保证人工植被建设的顺利进行。

Vegetation richness and vegetation coverage were important factor for butterfly diversity, which was consistent to them.

由此可见，城市化对蝴蝶生存和活动造成了比较大的影响，从而影响了其种类丰度和多样性指数，对生态环境的影响是很明显的。

The paper adopted the method of Braun-Blanquet school of vegetation ecology. Typical plots were chosen in order to investigate the vegetation type of the main parks in Kaifeng city. The analyses were based on defining the least area of communities with the usage of abundance dominancy and combining cover coefficient.

采用植被生态学中法瑞学派的研究方法，在确定群落最小面积的基础上，选取典型样地，运用多优度指数并结合盖度系数对开封市铁塔公园、禹王台公园、龙亭公园的植被类型、生境特点及各类型的群落生态学特征进行较为详细的研究。

Due to the complexity of the interaction between electromagnetic wave and the earth's surface, especially in the district covered vegetation, vegetation canopy disturbed strongly radar backscatter coefficient. So it is difficult to monitor soil moisture.

由于电磁波与地表相互作用的复杂性，特别在植被覆盖地表区域，雷达后向散射系数会受到植被覆盖层的强烈影响，这给监测土壤水分带来了极大的困难。

The vegetation types,the plant species,the geographical component of flora,and the basic character of creature sort,quantity and distribution were analyzed in detail.Its ecological status was evaluated from different angles,such as the primitivity and endemism of flora,the transitional and typicality of zonal vegetation,the stability and diversity of ecological system,the social benefits and academic field of nature reserve.

分析了区内植被类型、植物种类、植物区系的地理成分及动物类别、数量、分布特征曰从植物区系的古老性与特有性、地带性植被的过渡性与典型性、生态系统的稳定性与生物多样性、保护区的社会服务性与学术性等角度考察了保护区的生态地位。

The similarity analysis with non-metric MDS method reveals that exclosure results in lower similarity among vegetation quadrats, this difference, however, doesn't reflect from soil seedbank, the lag effect between soil seedbank and vegetation should be focused on in further study.

地上植被和土壤种子库间的相似性分析结果则表明相同措施同一土层间种子库中等相似，而不同土层间还是存在着一些差异。由于封育措施导致了植被样方的相似性较低，然而土壤种子库间的相似性仍然较高，两者间是否存在着一定程度的滞后效应有待于进一步研究。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐