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The presence of REE tetrad effects in apatites and whole rocks of S-type granites has been reported by Sha and Chappell (1999) and Zhao et al.(1999), respectively. The REE tetrad effect in minerals, such as apatite, spessartite, beryl, alkali feldspar and spodumene, from all zones of Altay No. 3 pegmatite has been found remarkable, and the fractionations among isovalent incompatible elements in these minerals are also significant. This paper puts forward that the REE tetrad effect is one of the basic features of peraluminous melts and the origin of REE tetrad effect might be probably related to some processes prior to the formation of pegmatite magma. The immiscibile liquid separation between silicate melt and hydrosaline melt may be responsible for it.

由于阿尔泰3号伟晶岩脉各带磷灰石以及与其共生的石榴石、绿柱石、碱性长石、锂辉石矿物均存在明显的稀土"四重效应"以及相同电价、相似离子半径的不相容元素间存在显著的分异，并结合最近赵振华等(1999)和Sha and Chappell(1999)报道S型花岗岩全岩和单矿物(磷灰石、独居石、长石、黄玉等)均存在稀土"四重效应"这一现象，本文研究提出，稀土"四重效应"是富挥发分过铝质岩浆体系的一个基本特征，其机制既不可能由含稀土的副矿物早期结晶引起残余熔体相中REE含量变化的结果，也不能定性地归因于流体相与熔体相相互作用过程中稀土元素在流体/熔体之间分异的结果，而很可能与伟晶岩岩浆形成之前某些过程密切相关，S型花岗岩岩浆在液相线以上存在硅酸盐熔体与高盐熔体的不混溶液相分离有可能是过铝质岩浆体系产生稀土"四重效应"的主要原因。

After comparing and choosing optimize designmethods which are used often to engineering design, Improved Decimalist GeneticAlgorithm is adopted, with the help of excellent body clone+child body prepotencytechnology, the section view of balancing weight retaining wall is searched globly ,sooptimize design is achieved.

根据衡重式挡土墙的设计理论，构造衡重式挡土墙的优化设计模型；通过比选常用于工程设计的优化设计方法，采用改进的十进制遗传算法，利用优体克隆+子体优生操作等先进技术对衡重式挡土墙的截面形式进行全局搜索，从而实现衡重式挡土墙的优化设计。

The paper discloses a process for diazotization fluorination of aromatic primary amines utilizing sodium nitrite and anhydrous hydrofluoride to produce the corresponding diazonium fluoride which is decomposed, usually by heat, to make the desired fluoroaromatics .

本文通过重氮化工艺路线的改进，在液态氟化氢中进行重氮化和重氮盐的热分解，提高了芳香族氟化物的收率，并且使重氮化反应工艺能应用于工业化生产。

With simplified assumption made for the modal trial mass ratio and the linear response characteristic of the holobalancing technique, the transfer matrix corresponding to a certain correction plane then is extended to the trial set transfer matrix, which is related to a certain order of modal trial mass set. The number of trial runs necessary for the balancing operation is reduced and the balancing efficiency is improved.

借鉴Darlow混合法中模态试重组的思想，通过对模态试重比的简化假设，利用迁移矩阵的线性可叠加性将对应于某单一平衡面的迁移矩阵扩展为对应于某阶模态试重组的迁移矩阵，从而减少了平衡高阶不平衡量所需的试重起车次数，提高了现场平衡效率，且平衡效果良好。

With simplified assumption made for the modal trial mass ratio and the linear response char acteristic of the holobalancing technique, the transfer matrix corresponding to a certain correction plane then is extended to the trial set transfer matrix, which is related to a certain order of modal trial mass set. The number of trial runs necessary for the balancing operation is reduced and the balancing efficiency is improved.

借鉴Darlow混合法中模态试重组的思想，通过对模态试重比的简化假设，利用迁移矩阵的线性可叠加性将对应于某单一平衡面的迁移矩阵扩展为对应于某阶模态试重组的迁移矩阵，从而减少了平衡高阶不平衡量所需的试重起车次数，提高了现场平衡效率，且平衡效果良好。

Also ,, and constitute the first radial scalar meson nonet, it is supposed that these states would likely correspond to the observed states ,, and ,respectively. The scalar state may be a good candidate for the ground scalar glueball.

结果表明，和组成基态标量介子九重态，它们分别对应于实验上观测到的共振态，，和；，，和组成第一径向激发标量介子九重态，它们分别对应于实验上观测到的，，和共振态；而是基态标量胶球很好的候选者。

Properties: colorless needle-like crystals, melting point 105 ~ 106 ℃, optical rotation +51 °(c = 0.978, chloroform), other reports shows that by ethanol recrystallization the melting point 104 ~ 105 ℃, methanol re - the formation of solvate crystal melting point 84 ℃.it is Soluble in acetone, chloroform, insoluble in ether, petroleum ether, insoluble in water.

性质：无色针状结晶，熔点105～106℃，旋光度+51°（ c=0.978，氯仿），还有报道经乙醇重结晶熔点104～105℃，经甲醇重结晶形成的溶剂化物熔点84℃。易溶于丙酮、氯仿，难溶于乙醚、石油醚，不溶于水。

The results showed that the flow reattachment distance in the lee side of various dune models are ranged from 4.8H to 10.8H depending on different stoss slopes, the maximum of flow reattachment distance was found in the lee side of the transverse dune with a 15° stoss slope angle.

实验结果表明，当来流风速垂直于沙丘脊线时，沙丘背风侧的气流重附距离介于4.8H～10.8H之间，最大重附距离出现在迎风坡坡度为15 的沙丘背风侧；沙丘迎风坡坡度是控制背风侧气流重附距离的主要因素，而自由风速对气流重附距离的控制作用较小。

The difference of bulk density of coastal soils took an effect on infiltration rate and diffuse rate. The infiltration rate and diffuse rate of coastal soils which bulk density was small were big. The water transmitting experiment of coastal soils showed that the saturated conductivity of different layers in soil profile were great, and the saturated conductivity of undisturbed soil was highly higher than that of disturbed soil. The saturated conductivity of coastal soils embanked earlier was lower than that of coastal soils embanked later. Under different water content, the unsaturated conductivity of coastal soils had a great change and the bulk density had an effect on unsaturated conductivity. The soil with a low bulk density had a high unsaturated conductivity. Chlorine ion moved in coastal soil was an inert ion. The distribution of CU in soil was definite and repeated, which is no relation with the time and velocity of infiltration. The concentration of infiltration solution and the texture of coastal soils had no apparent effect on solute movement synthetic dispersion coefficient, while bulk density took an apparent effect on solute movement synthetic dispersion coefficient. Synthetic dispersion coefficient of coastal soils increased as bulk density decreased.

浙江大学硕士毕业论文浙北海涂土壤水分特性及溶质运移模拟研究 4、海涂土壤的导水能力强，且土壤剖面备土层的饱和导水率变化大，原状土的饱和导水率远大于扰动土的饱和导水率，围垦时间较早的海涂土壤的饱和导水率较围垦时间晚的海涂土壤的饱和导水率要小；不同含水量下的非饱和导水率变化范围很大，最大值与最小值差距可达 10'③ 5、容重的不同对入渗率、扩散率、非饱和导水率都有影响，容重小，入渗率、扩散率、非饱和导水率也花 6、在海涂土壤中运移的氯离子是一&惰性离子&，氯离子在土壤运移过程中的分布有一定的确定性和重现性，与入渗时间和入渗速度无关，溶质运移过程中，入渗溶液的浓度和海涂土壤的质地对溶质运移综合扩散系数DSh无明显影响，而土壤容重对溶质运移综合扩散系数DSh有影响，容重小，DSh大。

After explaining correlation theory and its important features, the rescaled range analysis、modified rescaled range analysis and detrended fluctuation analysis are analysed. As for the drawbacks produced by the rescaled range analysis when faced with short term correlation, a modified rescaled range analysis based on short term correlation model is applied to Shanghai stock market and Shenzhen stock market. The result is explained and compared.

在阐述了分形时间序列的相关理论和重要特征后，对经典重标极差分析法、修正重标极差分析法和趋势消解波动分析法等一维分形分析方法进行了系统分析，针对重标极差分析法对短期相关会产生有偏结果的缺点，给出了一种基于短期相关的改进的重标极差分析法，把各种一维分形分析方法应用于上证综合指数和深圳成分指数序列进行实证分析，并对结果进行了比较和解释。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。