降雨量

The results showed that: planting two crops in a year under the condition of 640 mm annual mean rainfall in the Loess Plateau conduced to the substantial use of solar and water resources in summer fallow, the biomass yield, economical yield and water use efficiency was improved in different degrees, and the material cycle was enhanced.

结果显示：在黄土高原东南部年降雨量达640 mm左右的旱作农田，发展&一年二熟&种植能较好地利用夏闲期的水热资源，不同程度地提高了全年的生物产量、经济产量、水分利用效率，加强了农田物质循环。

The main contents are as follows:Firstly, starting with the general situation of soil erosion and the harms caused by it, the causes leading to the local soil erosion problem are analyzed comprehensively in the paper. And connecting with the measures taking place, sticking points towards the career of soil and water conservation are expatiated upon.Secondly, Back-Propagation Neural Network, One of Artificial Neural Network is used to set up a modal about the connection of the soil erosion modulus and seven factors impacts on it, such as, rainfall, rainfall largest intensity in 30 minutes, runoff coefficient, vegetation cover percent, rate of granule, rate of physical viscidity-clay, the rate of organic matter. Through the comparison with linear regression model, the second regression model, the Chinese Soil Loss Equation, it illustrated that BP Neural Network modal is more accurate than the other three modals in forecasting the mount of soil erosion, and the BP Neural Network will have some applicability in forecasting in soil erosion.

本文以霍山县作为皖西大别山区的典型区域，主要研究了以下内容：(1)从介绍霍山县土壤侵蚀状况以及所造成的危害入手，全面分析了导致当地土壤侵蚀发生的原因，并结合当地采取的水土保持相关措施，阐述了当地水土保持工作的症结所在；(2)结合上土市水土保持试验站多年实测资料和2005年实验资料，应用BP神经网络理论，建立了次降雨土壤侵蚀量与次降雨量、最大30min雨强、径流系数、植被覆盖度等因子之间关系的模型，并通过BP神经网络的预测模型与一次回归模型、二次回归模型、CSLE模型之间的对比分析，说明了建立的BP神经网络模型在土壤侵蚀预测可以取得较回归模型和CSLE模型更高的精度，也说明了BP神经网络理论在土壤侵蚀预报中具有一定的适用性。

The cultural characteristics between hypovirulent strain and high virulent strain was highly distinct.The pathogen of banana anthracnose latents on fruit, foliage, bract, blossom and stalk, stalk of plants with this disease is the most important carrier. The infection type of bannana fruit anthracnose is latent infection.

在香蕉果皮、叶、苞片、花器及假茎上均有香蕉炭疽病菌潜伏，假茎的病残体带菌率最高，为主要的侵染来源；采后香蕉果实上炭疽病侵染型为潜伏侵染型；开花后20d 的香蕉果实开始带菌，随时间延长，带菌量逐渐增加，以后各个生长阶段的带菌率与降雨量有关；炭疽病菌在果指不同部位的分布存在差异。

Frost-free period of about 230 days year, the average rainfall in about 1200 mm, but in 2001 60% of the rainfall in the May-September flood season, a spring flood season, the rainy season, three Autumn Rainfall of rain.

全年无霜期约 230 天，年平均降雨量在 1200 毫米左右，但一年中 60 ％的雨量集中在 5 至 9 月的汛期，汛期有春雨、梅雨、秋雨三个雨期。

The Sr isotopic growth periodicity is relates to the annual variation of Sr isotope in the surface layer of sea-water.

锶同位素的周期性主要是由于附近大陆年周期性降雨量的变化所引起的，它不受生物生长作用的影响。

Karst land use system in Du'an was sensitive to precipitation, lithology, soil, physiognomy, sea level and slope.

4都安喀斯特土地利用系统对降雨量、岩性、土壤、地貌、海拔高度和坡度等因素的影响均表现出明显的敏感性。

The results indicated that the surface salt contents in the spring of 2006 were the highest among the three samplings, the surface soil salt contents declined from spring to summer of 2006, and the change of surface soil salt contents was not obvious from summer to autumn/winter of 2006. The variation of surface soil salt contents was related to rainfall greatly.

土壤盐分浓度的变化与降雨量有密切关系，虽然2006年降雨偏多，但佛山市南海区农业集约化水平较高，部分菜地连年种植蔬菜、复种指数极高、化肥施用量偏大，从而在遇到干旱年份和季节，集约化露天菜地土壤仍有发生次生盐渍化的风险。

Average January temperatures range from -20 to -14°C(-4 to 7℉).

平均降雨量在350毫米到1000毫米之间。

To analyze the 10 climate factors (annual average temperature, extreme temperatures, frost-free period, annual sunshine hours, average wind speed, annual average relative humidity and rainfall, etc) in 35 Pinus ponderosa introduction areas of China by using principal component analysis, cluster analysis and correlation analysis.

对我国35个美国黄松引种地的年平均气温、极端温度、无霜期、年日照时数、平均风速、年平均相对湿度和年降雨量等10个气候因子及美国黄松生长状况进行了主成分分析、聚类分析和相关性分析。

As much as 15 inches of rain has fallen in some parts of Arkansas in the past 30 days, more than six times normal, National Weather Service data show.

在过去的30天里，阿肯色州部分地区降雨量高达15英寸，高于正常水平的6倍多，国家气象局的数据显示。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐