1) borders between farming and ranging regions
农牧交错地带
1.
The borders between farming and ranging regions are very important to our country in agricultural production;on the contrary,water resource is the bottleneck of development of these regions.
农牧交错地带在我国农业生产中占有十分重要的地位 ,而水资源又是该地区农业发展的瓶颈。
2) ecotone between agriculture and animal husbandry
农牧交错带
1.
Land use pattern and technique characterized as eco-economic type in the ecotone between agriculture and animal husbandry of Bashang areas of Hebei Province;
河北坝上农牧交错带生态经济型土地利用模式与技术
2.
Changes in land use of the ecotone between agriculture and animal husbandry in north China-a case study of Village Yaoledianzi in Inner Mongolia;
中国北方农牧交错带农村土地利用变化因子分析——以内蒙古尧勒甸子村为例
3.
Zhenlai county in Jilin Province is taken as a typical area to explore the universal land use pattern under ecological security in ecotone between agriculture and animal husbandry in Northeastern China.
东北农牧交错带位于中国北方农牧交错带的东部三北交接农牧交错区[2 ] ,土地利用上具有农牧交错、时农时牧的特点。
3) Farming-pastoral zone
农牧交错带
1.
Assessment of agricultural drought vulnerability:taking Xinghe County in farming-pastoral zone in North of China as a case;
农业旱灾脆弱性评价——以北方农牧交错带兴和县为例
2.
A review on the study of optimized eco-productive paradigm in the farming-pastoral zone of North China;
中国北方农牧交错带优化生态-生产范式
3.
The farming-pastoral zone of northern China plays a dual role in ecological conditions andproduction and occupies an important position in the national economy.
中国北方农牧交错带的生态、生产双重功能决定了其在国民经济发展中的重要战略地位。
4) ecotone between agriculture and pasture in North China
农牧交错带
1.
The Wuchuan county of Inner Mongolia, situated in the ecotone between agriculture and pasture in North China,was taken as the study example.
以农牧交错带的典型县———内蒙古武川县为例,计算出武川县生态系统水土保持、涵养水源、气候调节和维持营养物质循环等服务的总价值为6179638。
2.
Agricultural structure adjustment is necessary under the condition of aggravating ecological environment and lower income of peasant in the ecotone between agriculture and pasture in North China.
农牧交错带的农业产业结构调整在生态环境不断恶化、农民收入增长乏力的状况下势在必行。
3.
Two typical production systems belonging to two different peasant households in the ecotone between agriculture and pasture in North China were analyzed based on the approach of energy.
本文通过对北方农牧交错带两个典型农牧经营的农户的生产系统进行能值分析研究后表明在该地区总体上他们仍未摆脱广种薄收的生产方式,能值产投比的增加是依靠畜群超载数量的增加,这样对环境产生了巨大的压力。
5) Agro-pastoral transitional zone
农牧交错带
1.
Effect factors analysis of soil erosion in the agro-pastoral transitional zone after cropland being transformed into grassland;
农牧交错带退耕还草地土壤风蚀影响因子分析
2.
Effects of utilization years on soil physical properties in the agro-pastoral transitional zone after cropland’s being transformed into grassland;
利用年限对农牧交错带退耕还草地土壤物理性质的影响
3.
Effects of returning cultivated land to herbage on soil organic matter and nitrogen in the agro-pastoral transitional zone of north China;
农牧交错带退耕还草对土壤有机质和氮的影响
6) ecotone
[英]['i:kətəun] [美]['ikəton]
农牧交错带
1.
A Study on Technical Approaches in Improving Water Use Efficiency of Courtyard Rain-Collection in Ecotone of North Loess Plateau;
黄土高原北部农牧交错带提高庭院集雨经济转化利用效率的技术途径分析
2.
Study on the Technique of Grass and Crop Strip Intercropping for Controlling Wind Erosion at Ecotone in North Area of Yinshan Mountain;
农牧交错带粮草带状间作防风蚀保土效应的研究
3.
Characteristics of Spatial Distribution of Soil Water in Houshan Gentle Slope Hill Region of Ecotone in Inner Mongolia;
农牧交错带缓坡丘陵土壤水分空间分布特征——以内蒙古后山为例
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。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条