新疆某水利枢纽工程软弱结构面抗剪强度参数的试验研究

某水利枢纽工程位于伊犁地区,影响工程的主要问题为坝基岩体软弱结构面和断层的抗滑稳定问题。根据工程实际条件和软弱夹层特性,采取现场断层软弱结构面试验和室内模拟试验相结合,获得软弱夹层的抗剪参数。实践证明,把两种方法结合起来的试验成果可靠,尤其对一些不具备进行现场大型岩体软弱夹层抗剪试验的工程,采用室内中型直剪仪进 行剪切试验具有实用意义。     

A bilinear approximation of the surface relief in terrain correction computations

A new method is presented for the computation of the gravitational attraction of topographic masses when their height information is given on a regular grid. It is shown that the representation of the terrain relief by means of a bilinear surface not only offers a serious alternative to the polyhedra modeling, but also approaches even more smoothly the continuous reality. Inserting a bilinear approximation into the known scheme of deriving closed analytical expressions for the potential and its first-order derivatives for an arbitrarily shaped polyhedron leads to a one-dimensional integration with – apparently – no analytical solution. However, due to the high degree of smoothness of the integrand function, the numerical computation of this integral is very efficient. Numerical tests using synthetic data and a densely sampled digital terrain model in the Bavarian Alps prove that the new method is comparable to or even faster than a terrain modeling using polyhedra.     

河南降水及最长连续无降水日数时空特征

利用河南省均匀分布的50个台站自建站至1997年近50年的定时降水资料，分析了河南省日小雨、日中雨、日大雨降水过程出现次数和最长连续无降水日数，结果显示，河南省日小雨、日中雨降水过程一年四季均可出现，日大而过程主要出现在3～11月份，冬季仅在豫南一些台站出现，各级降水过程出现次数季节性变化明显，冬季出现最少，夏季出现最多，其地理分布随测站纬度、拔海高度、地形地貌不同有较大差异；最长连续无降水日数也有明显的季节性变化特点，其最大值多出现在冬季，春秋次之，夏季最小，地理位置差异也较明显。     

比值参数在高密度电法中的应用

探讨了比值参数在高密度电阻率法中的应用；根据工程实例说明比值参数在压制局部干扰和邻近异常分离中有良好效果；将比值参数断面与电阻率反演断面比较研究，能取得较好的异常解释效果。     

人工神经网络模型反演植被生物量参数

该文利用 1988年小麦生长期中生物量参数和微波 (10 2GHz)主被动遥感实测数据 ,作为输入输出I/O矢量对 ,训练人工神经网络为参数反演模型。然后用 1989年小麦生长期中微波主被动遥感实测数据和该神经网络模型 ,来反演其生物量参数在整个 1989年生长期中的变化。反演结果与遥感实测结果作了很好的比较     

SEDIMENTATION STUDY ON PUMPED-STORAGE POWER STATION OF PUSHI RIVER

I.INTRODUCTIONThePtlmped-storagepoll,erprojectofPushiriverisconsistedofupperreservoir,lobal-erreset'oir.watertransmissionSystemandpotvergeneratingsystem.ThelowerreservoirIviththecatchmentbasinareaof1141kmZisthewatersupplierl-c'hichislocatedonthedownstreamofthePushiriverinthesouthernpactofNortheastChina.Theupperreservoirisabout300-400metershigherthanthelowerresen!oirattheleftsideoftheriverwithcatchmentbasinareaof1.12km2.Thecharacteristicsoftheprojectandreservoirareshottviintablel-l.Ino…     

构造机理与地震大形势分析

对全球大震时空特征的分析表明，北南半球大震分布与陆地面积成比例，全球强震活动具有35年的地极移周期，并对一些具有全球活动特征的构造事件进行了机理探讨，最后对大陆西部强震的活动规律．尤其是主体活动区的特点进点了仔细的研究。给出了未来一段时间内的预测结果。     

徐淮地区冬小麦产量形成的穗粒结构模式

依据数学生态学理论，采用非线性密度制约形式，将主要气象条件的影响以指标形式引入模式参数，设计并研究了冬小麦穗粒结构产量模式，从穗粒结构途径研究了产量形成过程。     

DOES WIND STRESS DEPEND ON SEA-STATE OR NOT? – A STATISTICAL ERROR ANALYSIS OF HEXMAX DATA

There have been several claims, either explicit or by implication, either based on experimental evidence or on theoretical reasoning, that the wind stress is modified by the stage of development of the wind sea. However, the overall evidence is weak, because theories are still incomplete and because it is questionable whether the sea-state effect, which is of the order of 10%, can be separated from experimental noise, which is of the order of 20%. In this paper a rigorous statistical analysis of HEXMAX data is pursued in order to establish the significance of sea-state effects. It appears that the enhanced drag, especially at high winds, which has already been established by previous analyses, cannot be attributed to the effect of young waves. The analysis provides no clues for the actual mechanism, which could be related to breaking or shoaling waves. As the effect of sea-state on wind stress is much smaller than the experimental noise level, it is hard to detect. Nevertheless, HEXMAX seems to contain a wave effect that is at the edge of statistical significance. It is, however, not the wave age itself that influences the drag, but a parameter involving wave height.Because the HEXMAX evidence is only indicative, we conclude that the issue set out in this paper cannot be answered on the basis of the HEXMAX data alone. It is recommended that error analyses are also carried out for other relevant observational data sets and that new measurements with suppressed noise will be taken up.     

包头市工业资源的生态开发利用与持续发展

本文从生态经济和持续发展的观点出发，论述了包头市工业资源的优势与劣势，指出发展的根本出路在于对工业资源的生态开发和持续发展，对工业资源的生态开发和无围绕太 导产业群本进行，文章分别指出农产品加工业，能源工业，材料工业和机械工业的资源生态开发和问题，并提出其共同的指导性措施。