多层建筑抗震分析用的两个计算机程序

提供两个高效而实用的FORTRAN程序（例行子程序形式）,用于对称三对角矩阵的两个计算问题（其一是线性代数方程组的求解,其二是广义特征值问题的计算）。在工程应用中,它们可用于多层建筑的振动特性分析、反应谱法地震变形计算、Pushover静力推覆分析和时程法地震反应分析等问题中。     

渤海湾盆地南堡5号构造火山岩蚀变对储层物性影响及物性下限

薄片和扫描电镜资料已经证实,南堡5号构造火山岩储层存在着不同程度的蚀变.从火山岩的蚀变机理入手,研究分析了蚀变对火山岩储层物性的影响,应用经验统计法、孔隙度－渗透率交会法、压汞参数法、应力敏感法和最小含油喉道半径法确定了研究区物性下限：孔隙度为2.5%,渗透率为0.04×10^－3 μm².物性下限的确定有利于划分储层与非储层,统计储层的有效厚度,对储量的计算具有重要意义.本研究对其他地区蚀变火山岩物性下限的确定具有参照和借鉴意义.     

黑龙江省绥棱县土壤硒空间分布特征及其与土壤性质的关系

基于黑龙江省1：5万富硒土地专项调查取得的7701个高精度土壤数据,分析了硒、有机碳（TOC）、pH等理化指标,运用统计分析、相关分析研究了绥棱县农田土壤硒空间分布特征,并探讨硒与土壤性质的关系.结果表明,土壤硒含量在0.05×10^-6～0.87×10^-6之间,平均硒含量0.27×10^-6;农田土壤以足硒为主,足硒土壤占比88.00%,富硒土壤占比3.90%,硒潜在不足土壤占比7.24%,缺硒土壤占比0.86%.不同土壤类型硒平均含量由高到低依次为黑土 > 草甸土 > 暗棕壤 > 白浆土 > 风沙土.相关分析结果表明,TOC是影响土壤Se含量的主要因素,pH对土壤Se含量影响不明显.     

吉林省沸石的性质与应用

沸石是一种新近被综合利用的非金属矿产,本文通过对吉林省的沸石类型、矿物特征、化学组合、矿石的物理性质(热稳定性、比表面积)进行测定,从矿石的本质上说明其应用的可行性,通过对矿石在农业,建材方面的试验结果来证明矿石的可利用性。为沸石矿物综合利用提供一些试验数据,以便在应用中参考。     

一种线状对象空间自相关测度算法

从线状对象的定性属性数据特点出发,提出了一种表达线状对象定性属性数据空间自相关的算法,构建了适合定性属性数据相似度表达的属性矩阵,提出了全局自相关系数、局部自相关系数的测度表达,并验证了算法的有效性。     

三维地籍建模方法研究与实现

传统的地籍管理是以地表权利为核心的,不能满足地上或地下空间利用权利登记和管理的需求。因此,迫切的需要引入三维地籍来解决这些问题。本文分析了国内外三维地籍的研究现状,从技术角度入手,提出了面向三维地籍产权体的模型。基于该模型,建立了三维地籍系统,实现了诸如产权体的可视化、查询等功能。结果表明,该模型对三维地籍建模具有一定的参考价值和指导意义。     

长江中游武汉-九江河段河道形态及水动力学特征

Based on measured hydrological data by using ship-mounted Acoustic Doppler Current Profiler (ADCP) instrument, we analyzed shapes of river cross sections of the middle Yangtze River basin (mainly focusing on Makou and Tianjiazhen river reach). Hydrodynamic properties of river channels were also discussed. The research results indicate that nonlinear relationships can be identified between river-width/river-depth ratio (W/D ratio), sizes of cross section and mean flow velocity. Positive relations are detected between W/D ratio and mean flow velocity when W/D<1; and negative relations are observed when W/D>1. Adverse relationships can be obtained between W/D ratio and cross-section area. Geomorphologic and geologic survey indicates different components of river banks in the wider and narrower river reaches respectively. These may be the main driving factors causing unique hydrological properties of river channels in the middle Yangtze River basin. Narrower river cross sections tend to raise water level in the upstream river reach near narrower river channel, giving rise to backwater effects. River knots can cause serious backwater effects, which is harmful for flood mitigation. However river knots will also stabilize river channel and this will be beneficial for river channel management. The results of this paper may be helpful for flood mitigation and river channel management in the middle Yangtze River basin. Foundation: National Natural Science Foundation of China, No.40701015; Key Project of National Natural Science Foundation of China, No.40730635 Author: Zhang Qiang (1974–), Ph.D and Associate Professor, specialized in natural hazards and climatic changes, hydrologic statistics, floods and fluvial geomorphology.     

带缝空心RC剪力墙结构变形与耗能性能研究

为了研究带缝空心钢筋混凝土剪力墙结构的抗震性能,本文进行了六层1／3．0比例模型房屋的拟动力及拟静力试验,分析了带缝空心钢筋混凝土剪力墙结构在地震作用下的变形与耗能性能,探讨了结构在地震作用下的破坏机理、滞回特性及其薄弱环节或部位。试验结果表明：该结构模型延性的弯剪破坏形态与普通钢筋混凝土剪力墙结构不同;竖缝的设置增加了结构在弹塑性阶段的变形及耗能能力,结构具有较强的变形及耗能能力。作为一种抗震性能良好的新型的结构形式,带缝空心钢筋混凝土剪力墙结构具有一定的工程推广应用前景。     

Inter- and intraspecific variations of the chemical properties of high-Arctic mosses along water-regime gradients

We examined and compared the contents of organic chemical components (lignin-like compounds, total carbohydrates and extractives), carbon and nutrients (nitrogen, phosphorus, potassium, calcium, magnesium) among the mosses Calliergon giganteum, Hylocomium splendens, Racomitrium lanuginosum, and among three populations of H. splendens collected from habitats in contrasting water regimes in the Canadian high-arctic tundra. C:N:P ratios were analyzed among and within moss species. Mosses from hydric habitats had lower total carbohydrate and higher nutrients contents than did mosses from drier habitats; however, we found no intraspecific variations in nitrogen and calcium contents in the different populations of H. splendens along water-regime gradients. The contents in lignin-like compounds, extractives and carbon showed no clear trends along water-regime gradients. Mosses from hydric habitats had lower C:N, C:P and N:P ratios than mosses from drier habitats, although we found no intraspecific variations in C:N ratios in H. splendens along water-regime gradients. These results suggest that chemical properties of mosses, especially nutrient contents, are strongly correlated with water availability in high-Arctic tundra.     

基于岩石电性参数频散特性评价润湿性的实验方法研究

岩石电性参数频散特性与润湿性之间存在着密切的关系,在油驱水、水驱油的岩石电性参频散特性的实验中,不同润湿性岩石,其复电阻率模值频散率P_ρ和相位频散率P_φ随含水饱和度变化曲线的斜率k不同,亲油岩石的斜率k最大,中性润湿的岩石次之,亲水岩石的斜率k最小,其中油驱水相位频散率P_φ的斜率k与岩石润湿性的关系表现得最为明显.因此,可以利用油驱水相位频散率P_φ的斜率k定性的评价储层岩石的润湿性.