韩城矿区奥灰水化学特征及形成机制探讨

以岩石化学成分、水质分析、同位素组分以及水质动态长期监测等资料为基础，分析了矿区岩溶水介质的赋存与分布等水文地质背景，重点研究了水化学组分特征及其形成机制。结果表明：由矿区边部至中深部，水化学类型由重碳酸硫酸钙镁型向硫酸盐氯化钠钙型过渡，TDS随含水层埋深升高而水质变差，水化学组分主要由溶滤作用经去膏盐化和脱白云岩化过程形成，开采井群水质变劣的主因是矿区中深部高矿化水的混合作用所致。     

江淮气旋发生发展中尺度系统特征数值模拟研究

本文应用中尺度模式MM5对发生在江淮流域的气旋进行了数值模拟，并用模式输出的高时空分辨率、动力协调资料、HUBEX试验期间的加密观测资料进行江淮气旋的中尺度诊断研究。结果表明：从大尺度角度看，江淮气旋的生成可分为静止锋上的波动和倒槽锋生两种类型，但从中尺度角度分析，它们具有如下共同特点：（1）它们的生成源地均在大别山西侧，大别山地形均使得气旋发展增强，移速减慢。（2）在发展阶段，700hPa层以下的温压场的斜压结构是气旋发展的重要因素，当冷平流与暖平流呈现西北－东南的偶极子型时，气旋发展；当冷暖平流偶极子呈东西型时，气旋发展进入成熟期。（3）气旋中的中尺度雨带与Wave-CISK湿条件对称不稳定区有密切关系，辐合上升区出现在气旋暖锋前部和冷锋后部50－100km范围内。     

延河流域优势植物光谱指数分析

以延河流域优势物种的光谱数据为例,阐述了延河流域主要物种的光谱指数特征,分析了影响植被光谱指数的因素,总结了延河流域优势物种光谱鉴别方法,提出了利用植被光谱导数值和植被体内水份在970nm和1190nm附近的吸收特征帮助鉴别植被类型的方法。     

非溢流型（JMD）净水滤池的性能及特点—与溢流型净水滤池之比较

依据国外技术研制的非溢流型净水器,将滤池、沉淀池和絮凝池有机地溶为一体犤1犦。其双层滤料的任意组合,特殊的底板布水布气系统和侧向排水方式使非溢流型滤池在结构上有了新的技术性突破,使出水水质明显提高。反冲洗周期的延长及能耗的减少(水、电、药品),降低了滤池的运行费用;新型的结构设计使非溢流型滤池延长了使用寿命,缩短了施工安装时间而减少了投资成本。故非溢流型净水滤,池主要特性同溢流型单层滤池(如V型滤池)相比更具有先进性。     

Traffic‐induced variability in dynamic properties of cable‐stayed bridge

The traffic‐induced variability in the dynamic properties of a cable‐stayed bridge is investigated using ambient vibration measurements. Under a relatively steady wind and temperature environment, the ambient vibration test was conducted on the bridge with normal traffic conditions and totally 24 h acceleration response time histories were recorded. These data are divided into 12 sections with each data section containing 2 h measurements. Thereby the modal variability due to changing traffic loading is investigated through post‐processing of the data in each section in both amplitude and frequency domains. The result indicates that the natural frequencies of the global modes can exhibit as much as 1% variation within a day. The modal amplitudes of each mode as well as the modal deflection at each measurement position vary insignificantly. The damping ratios however are sensitive to the vibration intensity, especially when the deck vibration exceeds a certain level. Copyright © 2002 John Wiley & Sons, Ltd.     

Constituent material properties and clast-size distribution of volcanic breccia

Volcanic breccia is a representative heterogeneous rock. As a preliminary study for determining its mechanical properties in laboratory and field experiments, its material properties and structural features were described. Three-dimensional clast-size distribution was also estimated for the study site using the theory of stereology. With this distribution determined, a numerical simulation was performed to investigate the relationship between the volumetric proportion of clasts in a sample and the areal proportion and maximum length of clasts on a lateral surface of the sample. The following observations were made: (1) coefficients of variation for volumetric proportion are dependent on the size of the sample, and became large when the size of the sample is small; (2) samples with a small coefficient of variation can be selected at any size if a restriction is placed on the ratio, D_max/D₀, of the maximum length of clasts to the size of the sample; and (3) the volumetric proportion of clasts in each sample can be estimated from the observed areal proportions within an error range that depends on the whole volumetric proportion.     

快速放样线路中桩及边桩的技术方法

提出了以通过圆心和交点的直线作为曲线对称轴，在对称轴上任选一点为测站点，进行曲线中桩及边桩放样的方法，供同行参考。     

VB在工程测量中的应用

论述了VB在测量计算中的特点 ,并结合实例阐述了利用VB进行前方交会计算的实现方法 ,从而为利用交会计算及坐标换算等较为复杂的公式计算提供了一条可行的途径     

氮离子注入对钻杆接头材料表面硬度的影响

对钻杆接头材料30CrMnSiA钢的样品进行氮离子注入表面改性试验，结果表明，在不同载荷的情况下，选用氮的注入量为50×1017 N+/cm2是比较合适的，氮离子注入后样品的表面努氏硬度提高1倍多。     

渤海湾地区不同方向断裂带的封闭性

构造应力场的最大主压应力方向与同时期活动断裂走向的相互关系决定着断裂的封闭程度 ,两者的锐夹角越大 ,断裂的封闭性越好 ;两者的锐夹角越小 ,断裂的封闭性越差 ,渗透性越好 ,有利于流体的运移。据此用线性代数法换算出的断裂闭合系数可半定量地评价断裂的封闭条件 ;再结合不同油气主运移期的封闭性变化的历史 ,可对断裂带的有利的油气聚集部位进行预测。通过对渤海湾地区的油气聚集进行综合评价 ,认识到东西向和南北向展布的断陷带对油气的聚集最为有利 ,北西向展布的和现今断裂活动性较弱的北东向展布的断陷带中的部分地段也很有前景。预测庙西 1号、垦利 3号、庙西 3号等断裂带为下一步有利的油气勘探构造带。