耕地的

Cultivated land quality was assessed by BP neural network in Dazu County, Chongqing. The assessment results showed that paddy lands were mainly of the second-grade and third-grade, while dry lands were mainly of the first-grade and second-grade. It illustrated the high natural quality of the cultivated land, but the natural quality only reflected land natural characteristics. Therefore, influence coefficient was used to modify natural quality index based on the investigation to households. At the same time, by using the household income as the value of cultivated land, the impact of natural quality and investment structure on the value were further discussed. The results showed that trinomial equation and binomial equation were fitted to reflect the relationship between natural quality and income.

该文采用BP神经网络模型对重庆市大足县耕地自然质量进行评价，发现研究区水田自然质量等级以二等地和三等地为主，旱地以一等地和二等地为主，耕地自然质量总体偏高；但耕地自然质量仅仅是耕地自然属性的反映，因此在基于对研究区农户行为调查的基础上，采用"影响力系数"对耕地自然质量进行修正，并将农户收益作为耕地质量货币化价值的表现，进一步讨论了耕地自然质量和农户投资结构对这种价值的影响以反映对耕地质量的影响。

Garonne farms with 300,000 acres of arable land is a state-run farms, agricultural machinery and equipment advanced screening of food along with China's cause of the vigorous development of all staff through the company The hard work and innovation, the company continued to expand business, industrial investment has begun to take shape, from a simple trading company for the development of production, supply, sell one-stop service integration, the Group of economic entities.

引龙河农场是具有300000亩耕地的国营农场，各种农业机械和粮食筛选设备先进）伴随着我国外贸事业的蓬勃发展，通过公司全体员工的拼搏和创新，公司业务经营不断扩大，实业投资已初具规模，已从单纯的贸易公司逐步发展为产、供、销一条龙服务的综合化、集团化的经济实体。

Going with reducing of tilth and people inrush, the living format have been changed in essence.

随着耕地的减少，外来人口的大量涌入，"城中村"村民的生活方式也已经发生了根本的变化，不从事农业生产的农民成为依靠房租经济坐等收入的有闲阶层。

Motibity changed by gear-box in direction and rotate speed is transferred to the blade axis on the right side to drive the blade axis. blade axis'parameter, blade assembling frame and blade assembling means are ascertained. The load and movement of the blade axis are analyzed. And the best blade rotate speed is ascertained. According to the request of no-tillage soil, the appropriate furrow openers are chosen. They are staggered and assembled in two rows .According to the sliding cutting request, the crucial parts of the anti-blocking——the sliding cutting blade, its edge curve is analyzed and designed in principle. The academic curve function is gotten. Combined with working practice and technics request, the blade's figuration parameter is designed, 65Mn is chosen as the material for blades. The working load is analyzed. And the intension of the sliding cutting is analyzed and checked with ANSYS software. At last, the spring rack of the suppress wheal is analyzed in principle. The theory and parameter of designing the spring rack of the suppress wheal. Experiment indicated that the anti-blocking capability of this anti-blocking equipment was excellent.

设计出适合此防堵装置的动力传输方案，动力经变速箱变向变速后从右侧传给刀轴，驱使刀片切割秸秆；确定出了刀轴的参数、刀片的安装结构和安装方法，对刀轴的受力和运动进行了分析，确定出了刀轴最佳转速；根据免耕地的要求，选择恰当的开沟器，并采用双排错位安装的办法，避免了"瓶颈"现象的发生；根据滑切的要求对此防堵装置的关键部件——滑切刀片的刃口曲线进行了理论分析和设计，得到了刀刃的理论曲线方程；结合生产实践及工艺要求，设计出刀片的外形参数，选择65Mn作为刀片的材料；分析和计算了刀片在工作中承受的载荷，运用ANSYS 软件对滑切刀片的强度进行了分析校核；最后对镇压轮的弹簧支架结构进行了理论分析，提出了设计镇压轮弹簧支架的理论和参数依据。

Results show that there is remarkable correlation between the land use types and SOM. From1981 to 2000, the content of SOM increased in the whole area mainly because of the transformation from virgin grass land to cultivated land and increase of irrigable land. The average content of SOM increased by 28% and increased from 9.64 g/kg to 12.35 g/kg. Then the household changed their land use way by driven of interest and do not increase additional input anymore.

研究结果表明：土地利用类型及土地利用方式的转换对土壤有机质含量产生重要影响。1981～2000年，荒草地向耕地的转换以及因灌溉设施的完善而引起水浇地面积的增加使得整个研究区域土壤有机质含量普遍增加，有机质含量平均值从9.64 g/kg增加到12.35 g/kg，增加了28％；在利益的驱使下，农户改变了土地利用方式，不再向种植粮食作物的土地追加投入，研究区域土壤有机质含量平均值由12.35 g/kg降低到11.46 g/kg（2000～2006年）。

To meet the needs for improving the wall and protecting the cultivated land, a new structure system, the highrise lightweighted wall pannel frame made of coal ash in the main, was put forward.

本文适应墙体改革及保护耕地的需要，提出了以粉煤灰砌块等工业废料为主要原材料的高层轻板框架结构体系，进行了1／3比例模型的房屋结构试验，对其在地震作用下的受力及变形特点进行了分析，研究表明这种结构具有较好的抗震能力，可以实现地震能量的分阶段释放

On the basis of numeral material and field investigations, this paper analyses the natural condition of cultivated land, social and economic condition of cultivated land, stages of cultivated land utilization, productive potentiality of cultivated land, and studies on the agriculture with regional features, intensive faming of cultivated land, a grand gathering of faming, plan faming, taking part in WTO, witch tightly related to the necessary and important of quality utilization of cultivated land.

本研究在大量收集资料和实地调查的基础上，对福建省耕地利用的自然条件、社会和经济条件、耕地利用阶段、耕地生产潜力等进行分析研究。从特色农业、耕地集约经营与规模经营、耕地计划利用、加入WTO等方面探索耕地优化利用的必要性和重要性，寻找适合福建省不同区域耕地优化利用的途径，提出区域耕地优化利用的模式。

Today's pig industry has its origins in 6000 years of farming.Throughout this period the pig has been a valuable farm animal that has consumed waste products, fertilised the ground and provided an efficient source of meat production.

当今的猪肉加工厂起源于6000年前的农业，猪是相当广泛在那个时代，它们能很好的处理掉大量的食品废物，耕地的好工具，并且还是肉的主要来源。

Throughout this period the pig has been a valuable farm animal that has consumed waste products, fertilised the ground and provided an efficient source of meat production.

当今的猪肉加工厂起源于6000年前的农业，猪是相当广泛在那个时代，它们能很好的处理掉大量的食品废物，耕地的好工具，并且还是肉的主要来源。

The steppe landscape is dominant but not apparent in its patch and area, and the percentage of the original vegetation of Stipa bungeana steppe is very low in the study area, which is apparently characterized by human disturbance. The diversity and evenness of patches in the study area are higher than those of the steppe landscape area, and the fragmentation and the isolation of the steppe are the highest. The landscape shapes of artificial arbor woods and cultivated lands are the simplest, and the landscape shapes of classical steppe and artificial shrub are in an instable stage.

结果表明：(1)草原景观在其斑块数和面积上虽然仍居首要地位，但其优势并不十分明显，而且该区原生植被本氏针茅草原只占很小的比重，呈现出非常明显的人类干扰特征；(2)研究区斑块的多样性程度和均匀度较高，而面积的多样性程度和均匀度较低，同时，典型草原的景观破碎度最大，景观分离度也最大；(3)景观形态上，人工乔木林和耕地的景观形态最为简单，典型草原和人工灌丛这2种景观类型还处于很不稳定的阶段。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。