黄土的

The results show that when the depth gradually reduces, pH values gradually increase, but conductivities and (superscript – subscript 3) content gradually reduce. There are also obvious differences between the groundwater in loess, alluvial deposit and acidity rock in the south of Chang'an, which relates to the depth, the characters of loess, the lixiviation and the evaporation. The element content of groundwater is high in the loess tableland, so it's fitter for drinking than the groundwater in the Cuihua mountains, which is of acidity and low element content.

结果表明，长安南部黄土塬随着层位的降低，pH值有逐渐增大趋势，电导率和HCO(上标–下标 3)含量有逐渐减少的趋势；黄土地下水、冲积层地下水和酸性岩石地下水的化学成分存在明显差异，这与其理深、地层性质、溶滤与蒸发作用不同有关；长安南部少陵源黄土地下水元素含量较高，比呈酸性、元素含量低的翠华山泉水更适于饮用。

In this paper, based on the triaxial test, it is discovered that the structured loess has special mechanical effect of shearing strain rate, and it is proved that the structured loess also has the phenomena of strain rate softening. The CU shear strength and cohesion c increase at first, then decrease with the increase of strain rate, and a critical rate exists; the angel of internal friction doesn't change visibly with the strain rate.

通过结构性黄土三轴试验研究，发现结构性黄土具有独特的剪应变速率力学效应，"应变速率软化"现象同样存在于结构性黄土中；其CU剪切强度和凝聚力c随剪应变率的增大而呈现先增大后减小的特征，存在临界速率现象，而内摩擦角随剪切速率的增大基本上呈线性减小的趋势。

The Loess Plateau and its adjacent regions are in the critical eco-envi-ronmental zone of China, which is from subhumid to semi-arid,from forestto steppe and from agricultural regions to animal husbandry regions. Thereare serious environmental problems such as the most extensive and serioussoil erosion in the world, desertification, water shortage for crops, flooddamage, increased soil salinity as well as increased industrial pollution.

黄土高原及其毗邻地区包括以晋、陕、甘为主体的黄土高原，面积约35.85万平方公里，及其周围与之有关联的黄土分布区，范围大致是阴山以南、秦岭以北、太行山以西及日月山和贺兰山以东的地域。J两者合计面积为62.38万平方公里。

This is not surprising, given the closer proximity of Pengyang to the Asian inland dust sources; The average content of calcium carbonateis of Pengyang section is not only higher than that of central loess plateau, but also higher the west of Chinese Loess Plateau, which reflected Pengyang loess had been deposited by near Liupanshan\'s substances that contained more calcium carbonateis; The content of diffluent element of 10m depth in the section increased fast, which indicated that the modern eluviation and the leaching depth of loess may be stronger than our guess; The soil growth index can reflect the intensity of soil forming and the climatic changes; The "abrupt chang" of glacial and interglacial period was caused by strong soil-forming processes that enlarged the discrepancy of granularity between loess and paleosol. However, the magnetic susceptibility nearly cannot reflect the existence of S_8 and the magnetic susceptibility of S_7 is highest in the whole section, which is inconsistent with other studies that S_5 has the highest magnetic susceptibility.Thin-section examination shows that the micro-texture of the soil layers is divided into both cementing texture in S_7, S_5 and S_1, and granular texture in all others.

与其它剖面相比，彭阳剖面粒度总体上要比东部的洛川、西安，甚至西部的兰州、新疆东湾要粗；CaCO_3平均含量不仅高于黄土高原中部，也高于高原西部，反映出本剖面富含碳酸盐的六盘山近源沉积起到了很重要的作用；易溶元素含量在剖面10m处快速升高，淀积特征明显，反映出黄土受现代淋溶成土作用影响较大，黄土直立、疏松、多孔特性和高温与多雨组合的气候特点，使得元素淋溶、淀积的强度和深度超出了传统的认识和判断；烧失量与其它指标相比，不仅能区分冰期、间冰期；而且能够区分出次一级的冰阶、间冰阶，有较高的分辨率；土壤发育指数、红度能够反映土壤强度差异，是反映气候波动的较好指标；然而，磁化率不能反映古土壤S_8的存在，且S_7的磁化率在全剖面中最高，这与大多剖面S_5磁化率最高的特点不一致。4。

The development of weathering crusts proves that some paleosols in the ioess belongs to the eluvial mor, and the subtropical climate in Liuhe area of Jiangsu migrates to the southeast of the Loess Plateau at that time.

是黄土高原降水丰富的气候事件的显示。风化壳的发育证明黄土中有些古土壤确属淋溶型森林土壤，当时亚热带气候至少迁移到了黄土高原东南部。

According to the "Waterbirds Species List" published by the State Forestry Bureau in 2003,the waterbirds in 8 zoogeographical prefectures and 4 zoogeographical provinces in Shaanxi Province were counted,and the community similarity indices between each zoogeographical prefecture and zoogeographical province were figured out.

河流众多的关中平原省的渭河谷地平原州的水鸟种类最多，有85种，水鸟最少的是干旱的黄土高原省的南部黄土塬土石山地梢林州，仅有23种；群落相似性指数最高的是相邻的黄土塬土石山地梢林州和渭北台塬州。

The results indicate that the formation of loess vertical joints can be divided into two phases:① the formation of inner fissure, i.e. in the beginning of deposition, the undulation of terrain leads to uneven distribution of loess, then when it rains uneven collapsibility generates, which leads to generate inner fissures ;② the stage of fissure extension, namely loess continues deposition after the inner fissures have been formed, the increasing of the top pressure makes the top of inner fissure lie in the state of tensile stress, so, when the stress reaches its tensile strength, the inner fissure extends along the vertical direction and then becomes a vertical joint.

结果表明黄土垂直节理的形成可分为 2 个阶段：①内裂隙形成阶段，开始沉积时，由于地形的起伏导致黄土厚度上的分布不均匀，在降雨时产生不均匀湿陷，从而导致产生内裂隙；②裂隙扩展阶段，内裂隙形成后黄土继续堆积，顶部压力的增长致使裂隙顶部土体受到拉应力作用，当达到其抗拉强度时裂隙就会沿竖直方向产生扩张而形成垂直节理。

In order to provide new fine interspecific hybridization cultivar between plum and apricot,and summary high-yield cultivation techniques of Flavorosa,introduction experiment of Flavorosa in P.

为给黄土丘陵区提供优良的杏李种间杂交新品种，并总结出风味玫瑰在豫西黄土丘陵区的丰产栽培技术，在河南省豫西黄土丘陵区进行了风味玫瑰杏李的引种试验。

The critical loess slopes along the highways were the inputted form of slopes and measured values of cohesions and internal friction angles were the reference values of random variants. Monte-Carlo method was used to choose samples and the formula of the Bishop simplified method was regarded as control equation. The reliabilities of the loess high slopes in three positions of Shaanxi Province were simulated. Failure probability and reliability index were obtained.

以极限状态坡作为输入坡型，将陕西黄土地区公路勘察中实测的粘聚力和内摩擦角作为主要随机变量参考值，采用Monte-Carlo法抽样，简化Bishop法公式作为控制方程，对陕西地区3个地段的黄土高边坡进行了可靠度模拟，获得黄土高边坡的失效概率与可靠指标。

Based on the study of the loess spatial self correlation of the soil property parameter

因此，黄土土性参数统计分析和空间自相关性的研究，对正确评价黄土高边坡的稳定性，提高黄土边坡的设计水平均具有重要的理论和实际意义。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。