等角投影理论和方法综述

等角投影比其它性质投影之研究更为深刻，应用也最为广泛。本文对等角投影的历史发展作了简单回顾，重点对等角投影的数学基础、等角投影的一般公式、等角投影变形量度［８］、具有极值特性的等角投影和探求等角投影的方法等进行了综述。最后提出需要继续研究的若干问题作为等角投影研究展望。     

岩性、含油气性、有效覆盖压力对纵、横波速度的影响

在具有代表性的正旋回砂砾岩储层中，８种不同岩性的典型样品，在５种含油（气）水饱和状态下测试了纵、横波速度（Ｖｐ和Ｖｓ）与有效覆盖压力（△Ｐ）变化关系曲线。结果表明：（１）Ｖｐ和Ｖｓ与△Ｐ呈指数递增，Ｖｐ和Ｖｓ随△Ｐ变化在低压范围比高压范围更敏感，而Ｖｐ比Ｖｓ的灵敏度高。（２）同一状态下，同一非均质单层内的岩性变化范围控制了不同的Ｖｐ－△Ｐ，Ｖｓ－△Ｐ曲线族的宽度。岩性由细到粗，Ｖｐ－△Ｐ曲线由低向高变化，含钙、含砾粗砂岩的Ｖｐ－△Ｐ曲线处于曲线族的上界，砾状砂岩的Ｖｐ－△Ｐ曲线低于含砾粗砂岩的Ｖｐ－△Ｐ曲线。Ｖｓ－△Ｐ曲线也有上述规律。（３）同一样品，研究５种不同饱和度状态下的Ｖｐ－△Ｐ和Ｖｓ－△Ｐ曲线，发现无论压力条件如何，波速与饱和度均呈线性关系。（４）在同一的非均质单层内，Ｖｐ－△Ｐ，Ｖｓ－△Ｐ变化曲线随着含油、气、水饱和状态的不同具有明显的分带性。气饱和Ｖｐ－△Ｐ曲线族在形态及幅度变化上明显区别于油、水饱和状态，束缚水、残余油状态的Ｖｐ－△Ｐ曲线族，Ｖｓ－△Ｐ曲线也有上述规律。气饱和状态的Ｖｐ和Ｖｓ随△Ｐ变化的敏感度高于油、水饱和状态，气饱和状态的Ｖｐ随△Ｐ变化的敏感度高于Ｖｓ。     

一种BASIC通用菜单驱动程序的设计

在对ＣＣＤＯＳ汉字操作系统和ＢＡＳＩＣ语言特点的认真分析和处理后，得到了一个良好的通用菜单驱动程序，它完全可在不加改动或很少改动的情况下应用以汉字ＣＣＤＯＳ为操作系统的各种菜单驱动程序中。     

强震前地震多重分形谱的异常及其物理解释：以乌什研究区为例

应用有关软件分析新疆乌针研究区地震活动时间分布的多重分形谱Ｄｑ－ｑ和ｆ（ａ）－ａ。发现两次６级强震发生前，多重分形谱发生显著变化。主要特征是对一定的ｑ区间奇异性强度因子ａ取值变宽，Ｄｑ－ｑ曲线变陡，ｆ（ａ）－ａ的左端点或右端点下降。     

新疆及其邻区强震活动与趋势预测

对１８８０￣１９９３年新疆及邻区７级以上强震活动特征进行了分析讨论，认为研究时段内７级以上强震活动有明显的活跃与平静交替现象。研究时段内的强震活动经历了５个轮回，每个轮回包括一个平静幕和一个活动幕，每个活动幕都有相对的主体活动区，主体活动区和７级以上单个强震都具有沿西昆仑－南天山－北天山－阿尔泰地震带往返迁移的特征。各地震带６级以上地震活动也具有明显的由西南向北东整体迁移的特征，并且这种时、空、强     

A Computer Model for Cyclic Activity of Strong Earthquakes in Continental Seismic Zones

Based on the study of activity of earthquakes with M**********>7.0 in mainland China,we have found a dynamic pattern,i.e.,the cyclic characteristics in time and migration from one seismic zone to another in space.In order to understand the physical mechanism of this pattern,we use a nonlinear dynamic model to simulate the seismic activity in fault zones under a unified tectonic stress field.The basic elements in our model consist of a Maxwell body and a rigid sliding block.Basic elements in a column represent a fault,and coupling elements connecting different columns simulate the interaction among faults and fault segments.The results provide insights to the cyclic activity of strong earthquakes and to the feature of mutual influence between strong earthquakes in groups in the climax of seismic activity.     

A Study on the Relationship Between Sequential Anomalies of Water Level Step-Variations in the Wanquan Well and Earthquakes

This paper studies the relationship between water level step-variation anomalies and regional seismic activity.The train of thinking is as follows:First,a series of water level step-variation anomalies are regarded as sequential step-variation anomalies; next,these sequential anomalies are divided into several sub-sequential anomalies according to the temporal density of step-variations in different segments of the sequence; then the generation and evolution processes of various sub-sequential anomalies are analyzed to find their relation with regional moderate-strong earthquake activities,and finally the various sub-sequential anomalies are synthesized as sequential anomalies so as to analyze their relation with the tendency of seismic activities.By the above method,this paper has analyzed the relationship between a series of water level step-variation anomalies at the Wanquan well since 1981 and several regional moderate-strong earthquake activities.According to the monthly frequency,amplitude and tre     

Electromagnetic radiation anomalies before moderate and strong earthquakes

Ｅｌｅｃｔｒｏｍａｇｎｅｔｉｃｒａｄｉａｔｉｏｎａｎｏｍａｌｉｅｓｂｅｆｏｒｅｍｏｄｅｒａｔｅａｎｄｓｔｒｏｎｇｅａｒｔｈｑｕａｋｅｓ关华平，刘桂萍Ｈｕａ－ＰｉｎｇＧＵＡＮａｎｄＧｕｉ－ＰｉｎｇＬＩＵ（ＣｅｎｔｅｒｆｏｒＡｎａｌｙｓｉｓａｎｄＰｒｅｄ...     

房山花岗闪长岩体长石斑晶的数学特征及相带划分

对北京房山花岗闪长岩体中长石斑晶进行了系统测量,测点密度平均4.37个/km~2,测量标志为长石斑晶长轴长度和长石斑晶线含量等。对测得数据进行了分布统计、有序样品最优分割、和趋势变化分析等处理。揭示了长石斑晶在岩体中的分布规律和数学特征,划分了趋势岩相带,从而提出了较为合理的岩相带划分原则。     

Physicochemical properties of fine aerosols at Plan d'Aups during ESCOMPTE

The physical and chemical properties of aerosol particles were investigated at Plan d'Aups, one of the ESCOMPTE sites located in the St. Baume mountain area (700 m a.s.l.), 50 km east of Marseilles (France). The site is ideally located for assessing the vertical and horizontal extent of the pollution plume from the Marseilles–Berre area.Our study showed that polluted air masses from the Marseilles–Berre area are advected to Plan d'Aups in the early afternoon. Average daily concentration of particles reaches up to 40 μg m⁻³ while 1-h average particle number concentration is greater than 30,000 cm⁻³. Most of the particle mass is composed of SO₄²⁻ and organic carbon (OC). The chemical properties of the particles revealed that an additional source, possibly from the industrial area of Gardanne, contributes to the aerosol mass. This last source is characterised by significant emissions of elements, such as Zn, V, Al and Si.In addition to transport, we found that gas-to-particle conversion takes place at the interface between the free troposphere and the boundary layer. We estimated that on average, 30% of the particle number is accounted for by direct nucleation. This is potentially a major aerosol source to the free troposphere.