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Meanwhile, the concentration of Pb,Zn and other heavy metals is rather high in the oxidation zone and decreasesdownward to levels that are unbelievably low for Pb-Zn mine tailings. Theseobservations suggest that heavy metals should be re-immobilized by secondaryminerals, rather than primary minerals, in the oxidation zone, and could be leachedout from suboxic environment due to low rate oxidative dissolution which preventsthe precipitation of secondary minerals in significant amount. Thus, cover scenarioswhich establish a suboxic environment beneath the cover layer might not always beeffective in preventing heavy metal release from mine tailings.Sequential extraction studies indicate that, in addition to heavy metal leaching,oxidation of the mine tailings increased the mobility of residual Zn, and Cu, while Pb remains immobile due to the formation of anglesite (PbSO4). Using the seven-step extraction technique developed by Dold (J. Geochem. Explor., 2003, 80: 55-68), galena dissolves in significant amount at step 2 most probably due to the strong complexing of Pb2+ by acetate, while other metal sulfides dissolve at step 6, which suggest that this extraction technique could not be used to evaluate the mobility of lead in natural environment

重金属含量均低于新鲜尾矿，但以硬化层中的含量最高(Pb、Zn含量分别为0.47%和0.93%)，往下大幅度降低，表明尾矿风化过程中形成的次生矿物对Pb、Zn等重金属元素有较强的固定作用，而次氧化带的淋溶作用造成了金属元素的大量流失；(4)与新鲜尾矿相比，硬化层中铅的可迁移性大大降低，硬化层之下尾矿样品中铅的可迁移性也不同程度降低，这是由于硫化物氧化产生的硫酸根与尾矿中的铅反应形成铅矾(PbSO_4)的缘故；(5)氧化作用使尾矿中的zn、Cu等重金属的可迁移性不同程度地增大，其中对锌的可迁移性影响最大，铜的可迁移性与铁比较相似，铅则容易与硫化物氧化形成的SO_4~(2-)反应形成铅矾(PbSO_4)；(6)为了减少尾矿污染和修复矿山环境，人们提出了各种不同的尾矿覆盖方案，本文的研究结果表明，这些方法不一定能够有效地阻滞污染元素的迁移。

A tapered incident wave is used to reduce the truncated error. The angular correlation function is calculated by Monte-Carlo generated rough surface, the enhancement on nonmemory line of the ACF can be used to detection a target placed over or under the rough surface.

在散射目标存在时，目标与粗糙面的复合多次散射场的角相关函数，在不满足记忆线条件下也有普遍较高的角相关函数值，即在非记忆线上的增强可以用于检测粗糙面上方、下方的散射目标。

It can be used to filter city tap water,industry Using water or industry waste water, and it can also used as animalcule carrier to form biology filtering pool, it can purify waste through using bed biology velumt that surface of filtering material shaped.

MH 型陶粒滤料可用于慢滤池、快滤池、单层滤池或多层滤池做滤料，用来过滤城市自来水、工业用水或污水，也可用陶粒滤料做微生物载体，组成生物滤池，利用滤料表面形成的一层生物膜来净化废水。

With this approach, a mathematical model of ASVG is developed. The method is simple and can be used to analyze the detailed internal properties of an ASVG. It overcomes the disadvantages of the two methods generally used, one is a method for modeling an ASVG by getting differential equations according to the topology of the ASVG circuit, which is very complicated and it is difficult to get a unified model expression of an ASVG; the other is a method for modeling an ASVG by considering the whole ASVG as a voltage source, which is too simple to analyze the detailed internal properties of ASVG.

该方法既克服了根据ASVG装置拓扑结构列写微分方程组的建模方法过于复杂且不易获得统一模型表达式的缺点，同时又克服了将ASVG装置等效为电压源的建模方法太简单而无法用于分析ASVG装置内部性质的缺点，具有建模简单又能分析ASVG装置的内部性质的优点。

Traditionally,Yacc and Lex is a pair of tools to be used to facilitate writing compilers.In its non-compiler oriented applications as described in this paper,they are used to implement the translation between a program′s runtime internal data structure adn a static external store in a disk file form to catch the internal data structure.

传统上，Yacc和Lex是作为一对用来帮助实现编译器的工具，本文描述了二者在非面向编译器的应用中，它们是如何被用来实现把一个程序运行环境中的内部数据结构和以一个磁盘文件的形式出现的用来保存内部数据结构的静态外中存储之间的相互转换。

Hello, I am a 13-month baby's mother, my baby and also like you, then used after the cream has been like a species, there are eczema on the James, two days a lot better, just 34 days in general you remember what the name of the drug is the Shanghai Schering Pharmaceutical Co., Ltd."艾洛松, mometasone furoate cream" before going to bed to help your baby every day to wash clean, in place of eczema James,"James once a day, Oh, remember that only a "puff and then put like, just a few days, the baby all right out of eczema, and puff your skin is called the Provincial Hospital doctor about the kind of powder only where, because of their hospital formula, if the local eczema can not be used to break the paste, and right, you are right Fuzhou?

你好，我是一个13个月宝宝的妈妈，我的宝宝也和你一样，后来用了已种乳膏后就好了，有湿疹就涂，两天就好多了，一般三四天就好了，你记一下药名是上海先灵葆雅制药有限公司的《艾洛松，糠酸莫米松乳膏》你在每天睡前帮宝宝洗干净，在出湿疹的地方涂，《一天涂一次，记住只能一次哦》然后在打上粉扑就好，几天就好了，宝宝出湿疹没事的，粉扑你到省立医院皮肤科叫医生开一下，那种粉只有那里有，因为是他们医院的配方，如果湿疹的地方破了就不能用要膏了，对了，你是福州的吗？

VSOP87 Functions used to Compute Planeta - These functions are a VB version of the complete VSOP87 planetary theory designed to be used to in a program to compute the heliocentric ecliptic longitude, latitude and distance of the planets Mercury to Neptune over a period of several thousands of years to about 1 arcsecond of precision.

这些函数是一个VB版本的完整VSOP87行星理论，旨在一个程序中用来计算以太阳为中心的黄道的经度，纬度，以及Mercury到Neptune行星的距离（从数千年到大约1arc秒精度的周期内）。

Abstract］ objective to evaluate the distinctive clinical value of magnetic resonance urographymru）in the diagnosis of primary ureteral carcinoma.methods to compare the accuracy of diagnosis of mru with ultrasonography,urography,retrograde ureteropyelography and ct,diagnostic imaging and progress of ureteral carcinoma were analyzed in twenty-four cases from 2000 to 2006,twenty cases had mru examinations.the original preoperative diagnostic reports of various imaging facilities were analyzed on account of the results of operation and pathology.results mru could clearly show the obstructive location of ureter.with regard to the ureteral carcinoma,accuracy of the location diagnosis was 100%.mru was superior to ulstrasonography,kub+ivp,ureteropyelography and ct we used to apply.conclusion comparing with other diagnostic imaging facilities,it has an important value in highly efficient,accurate location,safe,noninvasive and so on with mru,which can be used to show the features of primary ureteral carcinoma and has a wider scope of clinical application.

目的 探讨磁共振水成像技术在原发性输尿管肿瘤中的临床诊断价值。方法分析2000～2006年24例原发性输尿管肿瘤的影像学诊断结果，并基于术中所见和病理报告，将磁共振水成像技术20例）与超声24例）、泌尿系造影24例）、逆行造影15例）、ct(19例）的确诊率相比较。结果 mru能清晰显示输尿管的梗阻部位，定位诊断准确率为100%，梗阻病因确诊率高于b超、泌尿系造影、逆行造影和ct检查。结论与其他影像诊断方法相比较，磁共振水成像在显示原发性输尿管肿瘤特征方面具有效率高、定位准确和安全无创等重要价值，而且有更广泛的临床应用范围。

Today,GPS has been used to built up the new control networks,to verify and improve the existed ones, or to strengthen the laters, and also be used to match the global or local geoids.

用GPS技术在建立新的地面控制网、检核和改善已有地面网，对已有地面控制网进行加密及在拟合区域大地水准面方面都发挥了重大作用。

Due to different place, different purpose, now there are many kind of grind brushes to be used to do different non-polish surface, the grain # for grain brush range from 36# to 500#, and the common used ones are 36#, 46#, 60#, 80#, the grain size of 46# is 425-355μm (internation standard ISO, china standard GB2477—83),80＃is 212-180μm.

因这类石材使用的场合、目的和加工工艺不同，故其抛光不同规格非光面型板材时，目前多采用研磨刷。粒度号从36＃到500＃，正常情况下使用36＃46＃，60＃，80＃四个粒度。46＃磨粒粒度粒径为425～355(国际标准ISO，中国标准GB2477—83)，80＃为212-180μm。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。