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Under certain conditions, the activation and migration of soil Cd were accelerated by the interaction of Pb and Cd and increased Cd uptake by wetland rice. The organic-bound Cd in rizhosphere decreased by 90%. These phenomena illustrates that the interaction is very important for the transformation of soil Cd fractions. Meanwhile, the interaction distinctly affected the composition of roots secretion and their coordination abilities with heavy metals, causing clear variation to Cd amount in root cortex and middle columniation.

在一定的实验条件下,Pb和Cd的交互作用促进了Cd的活化与迁移,增加了水稻地上部分对Cd的吸收,使根际土有机结合态Cd下降了90%左右,表明交互作用对Cd形态的转化是一个重要的控制因素;同时交互作用对根系分泌物的组成及其与重金属的配位能力有着明显的影响,使Pb、Cd在根系皮层和中柱中Cd的含量有明显变化。

In this paper,the development of non-linear analysis approach,a more detailed presentation of the finite element software ADINA and ANSYS in the reinforced concrete structure,step by step analysis of a reinforced concrete structure of the finite element analysis techniques and the use of commercial finite element analysis software for concrete the structure of the two most important components-beams and columns of the comparative study of performance analysis.

本文从非线性分析的发展入手,较为详尽的介绍了有限元软件ADINA和ANSYS在钢筋混凝土结构中的应用,逐步分析了钢筋混凝土结构的有限元分析技术,并且利用商业有限元分析软件对混凝土结构中最重要的两类构件——梁和柱的性能进行了对比研究分析。

Based on the propagation and transformation law of Wigner distribution function through a general axially nonsymmetrical optical system,investigated is the transform relationship of WDF between the input and the output planes of a pair of cylindrical lenses system which is used widely in optical signal processing .

基于维格纳分布函数在一般非轴对称系统的传播和变换规律,讨论了在光学信息处理系统中常用的双柱透镜系统输入和输出面WDF之间的变换关系,在直角坐标中给出了联系该系统相空间坐标的维格纳分布函数的坐标变换关系式和等价的矩阵表示。

The CFD software STAR-CD is used to simulate the normal operating conditions of cold and hot plenums in China Experimental Fast Reator. Complex 3-dimension model is established by using porous medium method. The temperature and velocity distributions of cold and hot plenums are given. These results are compared with the data of the thermal designs of CEFR which have been completed. Meanwhile, the influence of the buoyancy forces is analyzed.

应用计算软件STAR-CD对中国实验快堆正常运行工况中的额定工况进行了三维数值分析,使用多孔介质模型对屏蔽柱的影响进行了模拟,给出了冷热钠池的三维温度场和流场,与已有热工设计进行了比较,并著重分析了浮升力在数值模拟计算中的影响,为事故工况下的设备动态分析及相应的设备力学分析提供了数据。

The CFD software STAR-CD is used to simulate the normal operating conditions of cold and hot plenums in China Experimental Fast Reator. Complex 3-dimension model is established by using porous medium method. The temperature and velocity distributions of cold and hot plenums are given. These results are compared with the data of the thermal designs of CEFR which have been completed. Meanwhile, the influence of the buoyancy forces is analyzed.

应用计算软件STAR CD对中国实验快堆正常运行工况中的额定工况进行了三维数值分析,使用多孔介质模型对屏蔽柱的影响进行了模拟,给出了冷热钠池的三维温度场和流场,与已有热工设计进行了比较,并着重分析了浮升力在数值模拟计算中的影响,为事故工况下的设备动态分析及相应的设备力学分析提供了数据。

It was found that the composite structure of Ti-Si-N films, nanocrystalline TiN embedded in amorphous Si_3N_4 matrix, was confirmed in this work. The increasing deposition pressure resulted in the appearance of columnar structure, decrease in the film density, increase in the surface roughness, and deterioration of the adhesion strength and tribological properties.

结果表明,Ti-Si-N薄膜为纳米相的TiN镶嵌于非晶态的Si_3N_4基体中的结构,溅射气压的增大导致薄膜中柱状晶的出现,薄膜致密度下降,表面粗糙度增加,结合力和摩擦学性能恶化。

This paper has studied the application of eluant online generated method, gradient elution and concentrated method to meet the requirement of accurate measurement of super trace chloride and sulfate in water quality of the nuclear power plant, under the condition of using the separate column which has high selection of hydroxide.

研究了在新型离子色谱中采用淋洗液在线发生技术和对OH-选择性高的分离柱的条件下,建立适当的梯度淋洗程序和样品浓缩富集方法,以满足对核电水质中超痕量Cl-和SO2 -4进行准确测定的要求。

This paper has studied the application of eluant online generated method, gradient elution and concentrated method to meet the requirement of accurate measurement of super trace chloride and sulfate in water quality of the nuclear power plant, under the condition of using the separate column which has high selection of hydroxide.

研究了在新型离子色谱中采用淋洗液在线发生技术和对OH-选择性高的分离柱的条件下,建立适当的梯度淋洗。序和样品浓缩富集方法,以满足对核电水质中超痕量Cl-和SO2 -4进行准确测定的要求。

In addition, native gold and Si-bearing native copper and SiC that is an indicator of high pressure were recognized in picrites. This is the first documented case of the native gold and native copper enclosed in olivine phenocrystals, which will play a key role in studying the compositions of mantle plume.

此外,还对两个苦橄岩进行了重矿物分选,分选出高纯度的自然金和含Si的自然铜以及高压指示矿物碳硅石,并在薄片中发现了自然金和自然铜被包裹在橄榄石斑晶的现象,这是世界上首次在橄榄石斑晶中发现自然金和自然铜,对进一步研究地幔柱的物质组成具有要的科学意义。

Aiming at the frequent occurrence of drill-string fracture during gas drilling in the Puguang gas field, this paper, based on the statistical analysis of accidents on fields, makes in-depth investigation into the origins of drill-string accidents in aspects of peculiar drilling medium, different rock-breaking methods, and the vibration of drill string during the drilling process. Through macro, micro and material analysis of the fracture surface of drill string, the law of drill-string failure due to fracture is discovered and the fatigue fracture is found out to be the main type of drill-string fracture.

针对普光气田气体钻井过程中存在的钻具断裂频繁的问题,在对现场事故统计分析的基础上,从特殊的钻井介质、不同的破岩方式以及钻井过程中钻柱共振等方面定性分析了钻具断裂的原因;通过对钻具断口宏观、微观及材质分析,找到了钻具断裂失效的规律和主要形式-疲劳断裂。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。