THE VELOCITY FIELD OF MULTIPHASE FLOW AND EFFICIENCY OF BIOLOGICAL AERATION FILTER

Aeration is an important factor affecting the biological aeration filter. With a set of experiment device specially designed for the purpose, and the particle image velocimetry technique, the velocity field of the gas-liquid two-phase flow is studied under different conditions. The various simulated aeration states were actually applied to the experimental device of sewage treatment, and the results of the numerical simulation were verified. The final experimental results indicate that the most efficient state occurs when the ratio of water in aeration tank h/w=1, the diameter of capillary tubes d=0.6mm and the velocity of bubbles v=0.3m/s.     

应用Hilbert Huang变换方法研究等时小层划分及对比

 小层对比是油田开发过程中的基础性工作,其对比精度和准确性关系到是否能发现以前漏掉的一些储集层。为了提高小层对比精度,文中提出了应用Hilbert Huang变换方法提取等时小层的“三瞬”参数响应特征进行等时小层划分及对比的方法:首先用经验模态分解（EMD）方法对测井资料进行处理,得出不同尺度的固有模态函数(IMF);然后根据区域等时小层边界标定的要求,对不同尺度大小的固有模态函数进行Hilbert变换,提取出反映等时小层边界特征的瞬时频率、瞬时振幅、瞬时相位等（三瞬）参数;最后利用高分辨率剖面重建技术对瞬时频率进行重构,得到Hilbert谱。利用“三瞬”参数的周期旋回变化及Hilbert谱特征可标定小层的界面并在旋回的控制下进行等时小层对比。此法已在长庆油区应用,表明该方法是有效的。     

转换波三参数速度分析及动校正方法

转换波时距方程的精度直接影响到转换波的速度分析和动校正的精度。现今应用较多的转换波时距方程中有双曲线方程（本文称为单参数方程）、双平方根方程（或称双参数方程）及高阶非双曲方程。本文从纵波大炮检距方程出发，针对转换波传播特点，推导出了能反映介质垂向非均质性的转换波三参数时距方程，其中三参数分别指纵波速度、横波速度和垂向非均质性。在此基础上，形成了转换波三参数速度分析及动校正方法。为了比较单参数方程、双参数方程和三参数方程的精度，利用这三种方程分别对合成模型数据和实际资料进行了处理，结果表明本文提出的转换波三参数方程的精度高于其他两种方程。     

沭阳县颜集虞姬花木合作社建设情况的调研和思考

沐阳县颜集贯勤虞姬花木合作社，实现了农民在市场经济条件下的联合和合作，由过去的松散式产业经营创新发展到目前的利益紧密型产业化经营，提高了农民的组织化程度，改变了农民在市场经济中的弱势地位。给农民带来了实实在在的经济利益，增强了农民抗御市场风险的能力。     

高效管理者必须因势而变

在一个强调个性化的世界里,没有一种通行的领导力战略。卓越的领导者必须能够凝聚不同个性、年龄、文化的人,让大家围绕共同的目标努力。成功组织里,领导者的工作就是要确保处在不同职位的不同人都朝着共同的方向前进。当组织处于不同的成长阶段,具备不同的竞争力,由拥有不同技巧、能力、个性、经验、年龄、文化背景的人组成,就没有所谓＂最好＂的领导力风格。竞争力环境给领导力风格带来的暗示变幻多端的商业环境要求不同的领导风格。     

起伏地表条件下的合成平面波偏移及其并行实现

 基于波动方程的延拓方法保持了波场的动力学和运动学特征，能很好地克服时移静校正法（使波场产生畸变）的不足，消除地表起伏的影响，将非水平观测界面记录改造为水平观测界面（新基准面）记录。在重建的水平基准面上进行平面波源和平面波源记录的合成，可克服以往由于地形起伏而无法进行平面波源和平面波源记录合成的问题，完成起伏地表条件下的平面波偏移。为了进一步提高运算效率，可按照将平面波的不同入射角、不同频率范围分配到各个节点的原则，进行MPI并行计算，可成倍地提高计算效率。具体步骤如下：①将共炮集数据延拓至最低起伏面以下的新基准面；②从延拓后的共炮集数据中抽出共接收点道集；③将共接收点道集延拓至最低起伏面以下的新基准面；④从延拓至新基准面的接收点道集中抽出共炮集数据。上述整个过程相当于将观测系统下移至新的基准面。模型试算及实际资料处理结果表明，基准面重建后的并行平面波深度偏移结果与基于原始炮记录应用波场直接下延法得到的深度偏移数据的效果相当，但是前者的计算效率随着应用节点数的增多而成倍地提高。     

Origin,migration and mixing of oilfield brines: Stable iso-topic evidence from Kuqa Foreland Basin

87Sr/86Sr, 8 D and δ180 together with chemistry of oilfield brines, were measured from Cambrian to Neogene strata in the Kuqa Foreland Basin, northwest China. The brines have 87Sr/86Sr ratios ranging from 0.70944 to 0.71716, 8D values from -33‰ to -67‰ and δ18O from -9.0‰ to 3.9‰. The most radiogenic 87Sr brines have relatively heavy δ18O in the Cambro- Ordo-vician carbonates, and are suggested to originate from crystalline basement. 8 D and δ18O sys-tematics show that all the brines slope to Global Meteoric Water Line, and intersect at 8 D = -60‰ and δ18O = -8.8‰, close to that of present-day local meteoric water, suggesting that meteoric water has mixed with evaporated ancient meteoric water. More saline samples have the lowest δD and δ180 contents and molar Na/CI ratios of more than 0.9, resulting from salt dissolution.     

复杂地表波动方程反演延拓静校正

静校正问题是复杂地表地区地震勘探所面临的一个主要问题，它在很大程度上制约着资料处理的质量。本文在已知表层速度模型的基础上，研究了一种利用波动方程反演的静校正方法，即通过理论推导将静校正问题归结为一个求波动方程边值的反问题(亦称未知边值的反问题)，换句话说，复杂地表的静校正问题可通过波动方程边值反演来实现。文中针对反问题的特点给出了数值求解方法。这种静校正方法具有适应复杂地表起伏及表层速度变化剧烈的特点，可以充分考虑波场通过表层时所发生的透射、散射及反射，使延拓的波场具有较高的精度。数值模拟结果验证了方法的有效性。     

Flotation of Xinhua molybdenite using sodium sulfide as modifier

The feasibility of using sodium sulfide as the sole modifier for the flotation of Xinhua molybdenite ore was examined. The potential mechanisms involved in the different flotation systems were discussed. The comparative flotation results reveal that in the kerosene-sodium silicate flotation system, better recovery and grade of the molybdenum are obtained using sodium sulfide as the slurry pH adjustment agent than using CaO. Under the optimal conditions (64 g/t kerosene and 6 kg/t Na2S), satisfied recovery and grade of molybdenite concentrate can be achieved (84% and 8.2%, respectively), indicating that sodium sulfide is a potential substitute modifier of sodium silicate. The open-circuit flotation test results further confirm the effectiveness of sodium sulfide which may render recycling the tailing water possible and make the flotation process more environmental acceptable and more economical due to the less use of kerosene and scavengers.     

STUDY ON SOLUTION CHEMISTRY BETWEEN TANNIC ACID AND THE FLOTATION PULP OF WOLLASTONITE AND DIOPSIDE

The mechanisms of interaction betweentannic acid and calcium ions either addedexternally to or inherently present in the volution(dissociated from mineral surface),arestudied by the use of Inductively Coupled PlasmaAtomic Emission Spectroscopy(ICP-AES),Ultraviolet Spectroscopy(UV).It is found thatwollastonite has a high solubility in theconcentration of calcium ions,calcium ions areable to interact with tannic acid.