Instead, the erosion resistance is increased after FSP. The refined and uniformly distributed second phases, which are resulted from the FSP, can help to increase the hardness and further reduce the brittle fracture of the specimens. Si and nvAl3CuNi phases are usually found near or end of the grooves with little fracture. But the τ1 (Al9FeNi) phase is easier to be removed by the erodent cutting. It can be inferred that Si and nvAl3CuNi are useful to improve the erosion resistance of A384 aluminum alloy, but τ1 (Al9FeNi) phase is detrimental for the erosion resistance of A384 aluminum alloy.

經(jīng)摩擦攪拌制程改質(zhì)后精品免费一级污片，硬度提升欧美黑妞A片黑妞BBW，晶出相細(xì)化且均勻分布97久久超碰，降低脆性龜裂的現(xiàn)象發(fā)生精品自拍自产一区二区三区高清，有助於改善A384鋁合金的磨耗性質(zhì)，其中欧洲无码高清视频在线，亦發(fā)現(xiàn)在沖蝕溝槽附近有殘留和脆性破裂之共晶Si顆粒和nvAl3CuNiw晶出相黄色插处网站，推測(cè)此兩相為A384鋁合金中有助提升磨耗阻抗的第二相；而τ1(Al9FeNi)晶出相則容易受到?jīng)_蝕顆粒的切削而被沖蝕顆粒移除锕锕锕锕锕锕好污网站入口，增加材料的重量損失在线黄色网站亚洲欧美，推測(cè)τ1(Al9FeNi)晶出相為A384鋁合金中較不耐磨耗的晶出相。

The results showed, the intention of erosion of rock and soil has two sides: one is that object of erosion is mixture of rock and soil, that is, the micro-change of composition of soil surface is complexer; another is that the means and degree of erosion is different from original geomorphy.

結(jié)果表明色多多性爱视频，巖土侵蝕的內(nèi)涵為：一是侵蝕的對(duì)象是巖土非均勻混合物淫淫爽人人操人人狠，也就是說(shuō)，地表組成物的微變化比較復(fù)雜77se77亚洲欧美在线；二是侵蝕的方式色欲性爱视频在线观看、程度與原地貌有明顯的不同。

Among various affecting factors of gravity erosion,the topography and geomorphy,i.e.the gravity erosion provides the basic dynamic force and its behavior is the results of long-term action of gravity erosion.

在重力侵蝕的各種影響因素中欧美操逼打开直接看的黄片，地形地貌既為重力侵蝕的發(fā)生提供基本動(dòng)力91露脸中年肥熟妇，其形態(tài)又是重力侵蝕長(zhǎng)期作用的結(jié)果。

Headward erosion is main cause of river captrue,but it is not only; Erodeless belt is not absolute erodeless; Erosion of below river can cut through the watershed by "erosion chain" at last,Erodeless belt is not obstacle to river ...

認(rèn)為国产一区二区三区性交黄片，河流襲奪概念有其特定含義蜜桃无码成人影片在线播放，河流襲奪和河流侵并兩種河流兼并現(xiàn)象并存不悖；溯源侵蝕是河流襲奪的主因只有美女的黄色网站，但不是唯一原因真人a一级性交；無(wú)沖刷帶并非絕對(duì)的無(wú)沖刷，低位河的侵蝕通過(guò)&侵蝕鏈&最終能夠切穿分水嶺欧美在线观看视频免费A片，無(wú)沖刷帶不是河流襲奪不可逾越的障礙日韩最新版中文无码视频下载网站。

2Analyzing the unstructural knowledge of factors influencing soil erosion in theresearch area.17 watersheds in Guizhou Province were chosen and the relationship betweeninfluent factors of soil erosion and soil erosion there was studied.

分析了研究區(qū)土壤侵蝕影響因子的非結(jié)構(gòu)性知識(shí)。

The relationship of slope and upslope drainage area of the study area is S = 0.074 A-0.1895, and the gully initiation process is an interaction process of hydrological erosion, melt erosion and landslide erosion, the initiation threshold is increased by the biomass.

研究所得的切溝發(fā)育臨界地形條件為S = 0.074 A-0.1895日韩中文字幕综合，研究區(qū)切溝發(fā)育的過(guò)程是受水力侵蝕欧美二级三级黄色片视频、凍融侵蝕和重力侵蝕的交互影響的過(guò)程，而溝頭植被覆蓋的增大會(huì)導(dǎo)致切溝發(fā)育臨界條件的增大日韩在线免费观看网站。

The results show that an internal and mutual transformation of land-use types cause striking changes in soil erosion extent. The transition of cultivated land to woodland and grassland medicates erosion intensity, and the one from forestland to cultivated land and grassland aggravates erosion. In addition, land-use practices, including mainly human activities, have impacts on the content of suspended sediment.

研究表明99爱国产视，本區(qū)土地利用類型的內(nèi)部轉(zhuǎn)化和相互轉(zhuǎn)化引起土壤侵蝕程度的明顯變化；耕地向林地欧美又粗又长又黑、草地的轉(zhuǎn)化使侵蝕強(qiáng)度指數(shù)顯著降低你懂得的永久；林地向耕地、草地轉(zhuǎn)化有色精品合集无码一区，均顯著增加侵蝕強(qiáng)度指數(shù)亚欧精品在线观看；耕地、林地免费啊啊网站在线观看、草地的內(nèi)部轉(zhuǎn)化對(duì)土壤侵蝕也有少量影響国产做a高清免费视频。

But little gully erosion model included in soil erosion models. It is necessary to study soil moistures in a gully watershed for establishing a gully erosion model and restoring vegetation.

目前的土壤侵蝕預(yù)報(bào)模型沒(méi)有包括切溝侵蝕免费不卡在线毛片，因此研究切溝中土壤水分空間變化是建立切溝侵蝕模型的基礎(chǔ)，也是恢復(fù)植被的基礎(chǔ)亚洲小说在线。

The results showed that soil wind erosion was the near-surface wind-sand activity. The sediment particle saltates mainly in 7.5-43.5 cm. Wind sediment amount decreased along height, which correlate well with power function, exponent function and logarithm function. The sediment particle composition was influenced strongly by wind erosion intensity and topsoil characteristics. However, the regularity of sediment composition was distinct in a definite paticle size in different heights. Wind erosion amount increases with wind speed exponentially, which was influenced by times that the wind does.

結(jié)果表明：陰山北麓農(nóng)牧交錯(cuò)帶土壤風(fēng)蝕是一種近地表的風(fēng)沙運(yùn)動(dòng)人操人免费视频，風(fēng)蝕物躍移顆粒體主要集中在7.5～43.5 cm高度，風(fēng)蝕物含量沿高度呈一遞減函數(shù)www..com五月激情，對(duì)冪函數(shù)91福利免费视频、指數(shù)函數(shù)和對(duì)數(shù)函數(shù)均具有較好的相關(guān)性；風(fēng)蝕物顆粒組成與風(fēng)蝕強(qiáng)度和地表狀況關(guān)系密切高清无码黄在线；風(fēng)蝕物顆粒組成以某一粒徑范圍国产精选白浆视频一区二区、某一高度為界隨高度的變化而表現(xiàn)出明顯的規(guī)律性；風(fēng)蝕量沿高度的變化與風(fēng)力作用時(shí)間有關(guān)AAA搡老熟女国产，風(fēng)蝕量隨風(fēng)速的增大呈指數(shù)增加首页国内自拍偷拍视频。

Based on the existing work, we give the detailed introduction of factors, such as soil texture, wind velocity, vegetation, crop stubble mulch, soil moisture, terrain, artificial factors and so on. We also elaborate the quantitative relation between all related factors and wind erosion amount. At last, we summarize the exiting wind erosion controlling measures. The main purpose of this paper is to provide some references for experiment studys on wind erosion of soil and putting forward feasible controlling measures.

本文通過(guò)對(duì)前人所作研究工作的總結(jié)，詳細(xì)的介紹了土壤質(zhì)地黄色网站免费精品在线观看、風(fēng)速日本女优一区、植被、作物殘茬啪啪啪一级、土壤濕度在线观看黄A片、地形、人為因素等影響土壤風(fēng)蝕的因子欧美另类激情，并闡述了各相關(guān)因素與風(fēng)蝕量之間的數(shù)量關(guān)系国产一页；同時(shí)總結(jié)了當(dāng)前幾種能夠有效防治風(fēng)蝕的措施及其各自的優(yōu)缺點(diǎn)，旨在為今后開(kāi)展相關(guān)土壤風(fēng)蝕影響因子的實(shí)驗(yàn)研究和提出合理的治理措施提供一定的參考作用色友视频在线观看免费。