1) water-wind erosion crisscross region
水蚀风蚀交错区
1.
Numerical modeling of the soil-water dynamics in water-wind erosion crisscross region on the loess plateau;
黄土高原水蚀风蚀交错区土壤剖面水分动态的数值模拟研究
2.
Evapotranspiration of three types of plants in water-wind erosion crisscross regions in the Loess Plateau
黄土高原水蚀风蚀交错区三种植被蒸散特征
3.
In this study carried out in Liu Daogou watershed in water-wind erosion crisscross region,the undisturbed soil water retention curves of the different(layers) of two soil profiles located at the middle and upper part of a slope were firstly measured by centrifugal method,and then the soil hydraulic parameters such as saturated water content,residual water content,the inverse of the air.
该文在水蚀风蚀交错区六道沟流域分别对居于坡中和坡上两块样地160 cm土层不同深度未扰动土壤的水分特征曲线进行了测定,将V an G enuch tens水分特征曲线模式与M ua lem导水模式相结合,确定了两样地土壤剖面的水力学参数,对水力学参数在剖面的变化进行了分析。
2) wind-water erosion crisscross region
水蚀风蚀交错区
1.
Effect of N fertilization on the mineral nitrogen in soil in wind-water erosion crisscross region on the Loess Plateau
施氮对黄土高原水蚀风蚀交错区土壤矿质氮的影响
2.
By a field positioning observation,we studied soil moisture restoration after rainfalls in the cultivated alfalfa pasture of the wind-water erosion crisscross region of the Loess Plateau.
采用野外定位观测法研究水蚀风蚀交错区苜蓿(Medicago sativa)草地土壤水分在天然降水作用下的恢复过程。
3.
This paper systematically studied the influences of the different vegetation on the soil total nitrogen(TN) and organic matter(OM) in the wind-water erosion crisscross region in China.
通过典型采样与室内分析相结合,系统研究了水蚀风蚀交错区不同典型植被对200 cm土层内土壤全氮、有机质和C/N比值的影响,结果表明:(1)0-40 cm内土壤全氮和有机质含量随深度增加而逐渐下降,40 cm以下基本不随深度变化而变化。
3) water and wind erosion interleaving
风水蚀交错区
1.
Supported by remote sensing and GIS, this paper calculates the ecotone between agriculture and animal husbandry and water and wind erosion interleaving in term of expert knowledge, expounding their spatial distribution characteristics.
运用遥感与 GIS为技术支撑 ,以专家知识为依据 ,从而定量计算出中国的农牧与风水蚀交错区。
4) interleaving zone of water/wind erosion
风水侵蚀交错区
5) water-wind erosion crisscross region
陕北水蚀风蚀交错区
1.
Effects of biological soil crust on saturated hydraulic conductivity in water-wind erosion crisscross region,North of Shaanxi Province,China;
陕北水蚀风蚀交错区两种生物结皮对土壤饱和导水率的影响
2.
Effects of biological soil crust on soil physicochemical properties in water-wind erosion crisscross region,northern Shaanxi Province,China;
陕北水蚀风蚀交错区两种生物结皮对土壤理化性质的影响
6) water-wind erosion interlaced region
水蚀风蚀交错带
1.
Soil water characteristics of different typical land use patterns in water-wind erosion interlaced region.;
水蚀风蚀交错带典型土地利用方式土壤水分变化特征
补充资料:交错环和交错代数
交错环和交错代数
alternative rings and algebras
交错环和交错代数1 aitettla幼犯d雌s叨d川邵b”.;助‘T印.叮娜助砚”山田叨皿叨,曦讨J 孪拳所(al temative ring)是指每两个元素都生成一个结合子环的环;孪考华熬(al ter”ativeai二玩a)是(线性)代数并且是交错环.根据E.Artin的一个定理,所有交错环的类由如下一组等式定义: (习)y”x切)(右交错性); (xx)y二x(却)(左交错性).于是,交错环形成一个簇.在这种环里,结合子(ass呱ator)(结合性的亏量) (x,少,:)=(xy卜一x恤)是其自变元的一个斜对称〔交错)函数,这个事实表明使用术语“交错环”是合理的. 交错环的第一个例子是Ca尹ey数(Caylcy num-悦巧),它作成一个交错除环(幻忱n犯ti说s处阴一几城)或交错体,即有单位元的交错环且对于任意b和a笋0,方程ax=b和ya=b有唯一的解.交错除环在射影平面的理论中起着实质性的作用,这是因为一个射影平面是一个Motlfa飞平面(Mdufangp场能)(即关于某一直线的平移平面),当且仅当其三元环的任何坐标化是交错除环.在一个有单位元的环R中,如果每个非零元素均可逆且对任意a,b〔R均有等式a一’(ab)二乙(或者,(b a)a一’=b),则R是交错除环.任何交错除环或者是结合的,或者是其中心上的Ca洲ey一Di改50.代数(Qyley-众汰阳n爽灼ra). 每个单交错环也或者是结合环,或者是其中心上的Cayley一Di由on代数(在这种情形下,此代数未必是体).结合环和本原交错环都被Cayley·Di山on代数所穷尽.所有素交错环R(如果3R护0)或是结合环,或是Cayley一Dickson环. 在相似的条件下,交错环的许多性质本质上不同于结合环.例如,如果R是交错环,A和B是其右理想,则其积月丑未必是右理想,即使A是双边理想也如此.但是,两个双边理想的积仍是双边理想.交错环与结合环的差异也强烈地体现在这样的事实之中:由于括号放的位置不同,元素的积或是零或非零,从而交错环有各种幂零性.通常在交错环中使用如下几种幕零性:可解性(s olvabilit刃(环R称为具有指数m的可解子(s ulvable ringl如果存在自然数。
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参考词条