概率图解法软件研制及其在东升庙矿床研究中的应用

文章根据概率图解法原理,利用VB可视化编程技术,完成了概率图筛分软件的研制.并通过该软件对东升庙矿床矿石品位混合总体进行筛分处理,探究其成矿期次信息.已有研究结果表明:一次成矿作用形成的矿床,其矿石品位的累积概率图是一条直线.而东升庙矿床的8条代表性勘探线中4种主要成矿元素TS、An、Pb、Cu品位的累积概率图均为曲线且出现明显拐点,经多次作图检验证实有效拐点数为1,由此得到新的成矿期次信息,揭示该矿床经历了两期成矿作用,即中元古代同沉积-海底喷气矿化期和后生改造矿化期,这对于研究其成矿物质来源和成矿机理具有重要的意义.     

贵州梅树村期多金属矿沉积地质特征

贵州早寒世武梅树村期黑色岩系黑色岩系中的Mo、Ni、V等多金属矿与沉积环境的关系密切,形成不同的多金属组合,可分为粘土岩型钼钒矿和黄铁矿型镍钼矿和粘土岩型钒矿三种组合,分布于不同的沉积相区,可能为深源物质封闭海域沉积作用的产物。     

Wave run-up and overtopping on smooth and rough slopes of coastal structures

A series of hydraulic model tests has been carried out in a glass wave flume to investigate the influences of wave height, wave period, wave steepness, surf similarity parameter, roughness, layer thickness and porosity on wave run-up and overtopping of 1:2 sloped impermeable and permeable breakwaters fronted by a 1:10 gentle, smooth beach slope. The analysis of results involves the correlation between the overtopping energy transfer with the relative wall height and the relationship between wave run-up and overtopping rate. Further, measured wave run-up and overtopping rates are compared with the results given in the Shore Protection Manual (1984), Automated Coastal Engineering System (1992)and results of other investigators.     

Research on the spectral analysis and test method of period signals in monthly mean sea level

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浙北地区旱涝预报问题探讨—一种汛期降水量长期预报方法

本文分析了当地前期气象要素——温度的演变特点与汛期降水量之间的关系,建立了两者之间的回归方程,并由此作出降水量的长期预报,从预报误差和试报结果看,效果是好的。     

Dynamic Analysis of a Single-Column Platform (II)

This paper describes the study of a single-column structure used as well-head platform. In order to check the reliability of computation theory and programme, model tests have been carried out. The paper introduces the conclusion of tests and the dynamic properties of single-column platform are obtained.     

Triple diagram method for the prediction of wave height and period

Many formulations have been developed so far to predict the wave height and period from fetch length and wind blowing duration for a constant wind speed. This study aimed to predict wave parameters from fetch length and meteorological factors by using triple diagram methodology based on Kriging principles. Proposed model results were compared with Joint North Sea Wave Project (JONSWAP) model which is used so commonly in the ocean and coastal engineering studies. For the implementation of the methodology hourly wave and wind data were obtained from a buoy located in Lake Ontario. Numerical and graphical comparisons demonstrated that the proposed method outperforms the classical formulation.     

海浪周期关系的研究

本文利用现场观测数据、实验室风浪槽观测数据和由文氏谱及JONSWAP谱生成的模拟数据,研究了有效周期与谱平均周期、谱峰周期与谱平均周期以及有效周期与谱峰周期的关系,通过数据拟合给出了相应的关系式.研究发现,有效周期与由谱的负阶矩计算的平均周期之间的关系更加稳定,并且有效周期与负2阶矩计算的平均周期几乎相等,均代表了海浪主导波对海浪平均周期的贡献.     

中国对虾镰刀菌病的细胞病理研究

本文报导中国对虾养成期病原体茄类镰刀菌Fusarium solani(Mart)的细微结构及其引起宿主的细胞病理变化,以便为该病的正确诊断和有效防治提供依据。