真三轴条件下原状黄土的非线性本构模型

为了研究复杂应力条件下非饱和原状黄土的非线性本构模型,通过考虑真三轴条件下中主应力和吸力对大主应变的影响,提出了一个考虑中主应力影响的非饱和原状黄土的非线性本构模型。该模型包含12个参数,均可由常含水率非饱和土真三轴试验确定。研究了中主应力对土体变形和强度的影响,探讨了模型参数的变化规律。初始吸力一定时,土体的黏聚力随着中主应力的增大而增大,而内摩擦角随着中主应力的增大呈线性减小趋势。当吸力小于162 kPa时,吸力摩擦角等于21.8°;当吸力大于162 kPa时,吸力摩擦角等于5.5°。初始吸力相同时,不同中主应力条件下土体的体积模量可取为常数。利用该模型预估了常含水率真三轴等向固结试验的吸力变化规律,理论结果与试验结果比较接近。但是对于真三轴剪切试验吸力的预估还需要进行深入探讨。     

山西成金中酸性侵入体研究

山西金矿与燕山期中酸性侵入岩密切相关。为从三维角度全面研究岩体，应用综合信息解译，全省圈定隐伏中酸性岩体６６个，这些岩体出露面积小，隐伏范围大，表明岩体剥蚀程度浅，成矿潜力大，据其本身及分布特点，可划分为５个岩带，１４个亚岩带。据综合信息标志，判别全省有４４个成金岩体，并举实例阐述其综合信息特征．     

台风暴雨的逐步Logit动力统计释用预报试验

在对Ｌｏｇｉｔ判别系数β作似然比检验的基础上，用数值预报产品作为外生变量，用极大似然估计，对Ｌｏｇｉｔ判别分析的外生变量进行逐步筛选，建立了南京台风季节逐日的逐步Ｌｏｇｉｔ动力统计释用天气预报模型。     

JFSAS04.##2对海南万宁降水预报的统计分析

通过对 jfsas0 4.# # 2的预报质量统计 ,从而了解它在什么时候的预报效果较佳 ,在什么时候不够理想 ,有利于提高预报准确率。     

吕梁地区分县降水逐日滚动T106产品释用系统

降水天气预报一直是各级气象台站工作的主要内容，如何能充分利用T106数值预报产品，制作更及时、准确的天气预报是气象工作者多年来探讨的主要课题之一。本系统旨在把T106数值预报产品与预报经验结合吕梁地区气候特点，对T106数值预报产品进行二次加工，制作出吕梁地区分县降水逐日滚动预报。     

Fault deformation anomaly and intermediate and short-term prediction of the Jingtai M s=5.9 earthquake

The time-space distribution characteristics of fault deformation anomaly in the near-source region and its outlying zone in the seismogenic process of the Jingtai M _s=5.9 earthquake occurred on June 6, 2000 in Gansu Province is studied preliminarily. The distribution scope of fault deformation anomaly before the earthquake is wide, the anomaly shape is complicated and the pattern anomalous zone of fault deformation (strain) information index is obvious. The shape and amplitude of fault deformation anomaly in different regions differ significantly, which is closely related with the tectonic location of anomaly. The fault deformation anomaly of α, β, and γ phases along the western segment of Haiyuan fault zone shows the process from the quasi-linearity to non-linearity of fault movement in the near-source region, matches the high-value anomalous area of fault deformation (strain) information index, and reflects the high strain accumulation in the seismogenic region. However, the anomaly of abrupt jump and cusp with a large amplitude occurred in the areas far from the earthquake, such as Liupanshan fault zone which is the tectonic convergent section does not reflect the strain accumulation of its location, maybe it is a sign that the regional tectonic stress field is strengthened in the seismogenic process. Based on the above-mentioned facts and combined with the preliminary summary of experiences and lessons in the intermediate and short-term prediction of the Jingtai M _s=5.9 earthquake, we study and explore the application of fault deformation anomaly to earthquake judgment. Foundation item: National Key Basic Research Development Program (G1998040703 and G1998040705), and State Scientific and Technological Project of the “Ninth Five-Year Plan” (96-913-09-01-02-03 and 96-913-09-02-02-03), China.     

四姑娘山国家风景名胜区旅游资源可持续利用对策分析

四姑娘山景区风光旖旎，旅游开发已取得很大成效。从景区的可持续利用和发展出发，分析并推出景区内可再开发利用的旅游产品，提高景区景观资源的品位和影响力，促进地方社会经济的繁荣。     

FY-1 METEOROLOGICAL SATELLITE DATA RECEIVING, PROCESSING AND APPLICATION

This paper summarizes the characteristics of Fengyun satellite and the properties of the data transmission,and also gives a brief introduction to the data acquisition and processing system. At last, it describes the productsderived from satellite data produced by this system and their applications in particular.     

The Yecheng, Xinjiang, China, earthquake of February 14, 1980 —A destructive intermediate earthquake

In this study, we have checked the location and focal depth of the Yecheng earthquake (m _b = 6.0, maximum intensity VII) of February 14, 1980. The result shows that this is an intermediate event with a focal depth of 90 km. The microepicenter is located at 36. 4°N, 76, 9°E, while the macroepicenter is at 37.3°N, 76.9°E, 90 km to the north of the microepicenter. This is the first destructive intermediate event in China which led to a damage as severe as of intensity VII. The focal mechanism of the event is determined to be of thrust type. Combined with the analysis of seismological and geological data in surrounding area, the possible relation between the event and plate movement has been discussed. The result in this paper indicates that in some particular place, the destructive effect of intermediate event should be considered in seismic hazard assessment. The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 137–143, 1992.     

A comparison of concentrations of fission products,radon 222, and cloud condensation nuclei over the North Atlantic

The concentrations of airborne fission products were observed to be air mass dependent during a cruise of the USNSHayes from Norfolk, Va to Athens, Greece in May–June 1977. Minimum concentrations of fission products, radon, and CCN (cloud condensation nuclei) were measured in maritime air which had previously transited northern North America. Higher fission products, radon, and CCN concentrations were measured in recent, continental air traceable to mid North America or central Europe. These data are consistent with either entrainment by strong winds of previously precipitated fission products (the continental effect) or greater transfer of fission products from the stratosphere to low levels by tropospheric folding.