查询词典 headwater erosion

The counter measures of solving these problems were suggested as follows: firstly, using water resources and fertilizer reasonably and choosing salt tolerance crops to control saltinization; secondly, choosing acid tolerance feed and using the chemical method to control acid rain; finally, soil erosion could be controlled by bioremediation.

对于三种生态环境问题，提出的控制对策如下：盐渍化的治理对策为合理用水、施肥，种植合适的耐盐作物；酸沉降治理对策为种植抗酸作物和采用化学调控方法降低降对作物的损害；水土流失使用生态恢复工程和生态重建工程进行治理。

However the chlorohydrin route generates chlorinated by-products, mainly dichloropropane and CaCl_2, which results in equipment erosion and serious environmental pollution, while the co-production route needs large investment and its economic benefit is linked to market of the by-products, namely styrene or tert-butyl alcohol.

氯醇法设备腐蚀和环境污染严重，共氧化法设备投资巨大且受到联产物——苯乙烯或叔丁醇销路的制约。1983年，Taramasso首次报道了钛硅分子筛(TS-1)的合成，为低碳烯烃选择氧化开辟了一条新的途径。

In order to find the suitable working condition for the coating applying, the slurry erosion tests of the 20〓 steel, high chrome cast iron and coating materials have been carried out.

最后，为了找到能较好发挥涂层材料作用的工作条件，我们对涂层材料、20号钢和高铬铸铁进行了浆体冲蚀磨损试验。

It was seen that there were obvious epithelial changes caused by erosion such as cilium shedding, cell stripping and surface depression. In the meantime, there were mycoplasmas adhering to the epithalial surface or tips of remainder cilia.

扫描电镜观察，在接种MG的气管环上，见到明显的纤毛脱落、细胞剥离、粘膜面凹陷等上皮受侵蚀变化，同时见霉形体附着于光秃的上皮表面或残存纤毛的顶端。

First, it was to obtain two binary images from segmenting image by two thresholds. Second, erosion, opening and closing were done to the two images according to some knowledge of the shape and location of the objects in the image that we have already known. Last, the edge information from the image segmented by a high threshold was put into the image segmented by a low threshold. It is the way to segment and discern circular objects accurately from the complex image and can greatly improve the accuracy rate of discerning.

首先分别根据两个阈值进行分割得到两幅二值图像，然后根据目标是圆形以及其大致位置等先验知识分别对两幅图进行腐蚀，开启，闭合等数学形态学运算，将高阈值分割得到的图像中的边界信息叠加到低阈值分割得到的图像中，实现对复杂背景图像中圆形物体的准确分割与提取，解决了复杂背景图像中物体识别率低的问题。

Clear-cutting large areas of forest at once and constructing steep switchback roads to harvest the timber have resulted in erosion and stream habitat destruction.

为了木材而大面积彻底砍伐森林以及修建陡峭的山路造成了水土流失和河流生态系统的破坏。

Hubei can be divided into 9 kinds of three grade region to soil erosion type and intensity,based on the information of the type and patterns of landforms,crust stability,populationcomposition,formation of landuseing type,structure of natural ecosystem,local industricalcomposition,traffic network and city-town system,natural resources and cleugh density.

以地貌形态类型组合结构及地壳稳定性、人口组成结构、土地利用类型结构、自然生态系统结构、地域产业结构、交通网络和城镇体系结构、自然资源结构、沟谷密度分布信息为基础，将湖北省土壤侵蚀类型、强度划分为9个3级类型区。

Yesanpo Geopark is situated in Laishui County of Hebei Province, covering an area of about 600km~2 , main scenic spots 258km~2 . Yesanpo geopark is a wonderland gifted by nature, characterized by its One-Hundred-Li structural erosion gorge area, Gantry days related faults granite gorge area, Ming and Qing Great Wall, cliffside carvings culture heritages with great scientific and tourist significance.

公园以百里峡构造—冲蚀嶂谷，龙门天关花岗岩断裂构造峡谷等地质景观和历史悠久的明清长城、摩崖石刻等人文景观，向世人展示了其博大精深的自然魅力，具有极高的科学研究价值和旅游观赏价值。

In the fully open or fully closed, the ball and valve seat sealing surface and the dielectric isolation, medium passed, will not cause the erosion of theAutomatic Control Valves valve sealing surface.

在全开或全闭时，球体和阀座的密封面与介质隔离，介质通过时，不会引起阀门密封面的侵蚀。

The mechanism of new soil erosion and other calamities casused by the mine of coalfield was also described.

如何合理开发这块"黑色宝库"，保护该区的生态环境，防治新的水土流失和土地沙化，使该区的社会经济与自然环境协调发展，是关系到该区地方经济振兴的大事。

Methods Clinical data of 3 cases of bile duct injury during laparoscopic cholecystectomy were analyzed retrospectively.

回顾总结3例LC术中胆管损伤的临床资料，分析3例胆管损伤的原因及对策。

These techniques are applied to the gobang.

本文将这些技术用于五子棋中。