大开间小型混凝土砌块10层模型房屋抗震性能试验研究(Ⅰ)

我国抗震设计规范（GB50011－2001）规定在6、7、8度区，混凝土小砌块结构分别可以建七、六、五层。由于混凝土小砌块结构的最大优势在于10－20层（与混凝土框架或框架剪力墙结构比）。本文按1／4比例制作了10层混凝土小砌块结构模型，按7度设防要求实施构造措施，通过振动台试验研究模型结构的抗震性能。结果表明，模型结构完全能够满足在7度区“小震不坏，大震不倒”的要求。圈梁、构造柱以及水平拉结筋构成的约束体系抗震作用是明显的。试验利用砌块的非注芯孔灌注铁砂来模拟墙体出平面动力效应。在本模型的构造措施下，平出面反应不对结构破坏起控制作用。     

Wavelet triangulated irregular networks

GIS applications have recently begun to emerge on the Internet. The management of three-dimensional geographic datasets in this distributed environment poses a particularly challenging problem, which highlights the need for a good data representation. This paper presents a new multiresolution data representation: the Wavelet Triangulated Irregular Network (WTIN). Compared to the traditional cell-based Digital Elevation Model (DEM) format and the Triangulated Irregular Network (TIN) format, it is more compact and suitable for scalable distributed GIS services. This format is based on the second-generation wavelet theory and is specially designed for geographical height field data. The modified Butterfly scheme is used for constructing the wavelet transform. For every point in the geographic surface, only a single wavelet coefficient is used, which makes the final data representation very efficient and easy to compress. Because the transform used in the data representation is a linear filter operation, the computational efficiency is better than other multiresolution data formats for terrain surfaces. Results from numerical experiments on real data are given to demonstrate that the proposed data representation can be efficiently implemented. The results show that the proposed WTIN data format can provide multiresolution data sets, which achieve significant compression while preserving geographical features. The quality is found to be quite acceptable for geographical terrain representation.     

国家体育场(鸟巢)斜柱测量放样原理与方法

用两种不同的数学方法解决国家体育场斜扭柱在任意高程上柱角点三维坐标计算问题,对斜柱现场放样的方法进行阐述.提出建筑施工测量中空间直角坐标系旋转矩阵法转换思路,并论述全站仪坐标放样限差的制定方法.     

异步时序设计亚稳态的消除方法

提出一种基于异步比较法产生空满标志位，并利用锁存器实现标志位与时钟同步的FIFO，同时还给出了相应的Verilog HDL代码。该方法能提高时钟频率,节约版图面积。     

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Out‐of‐plane effects in 2D borehole‐to‐surface resistivity tomography and applications in mineral exploration

In this paper, we discuss the effects of anomalous out‐of‐plane bodies in two‐dimensional (2D) borehole‐to‐surface electrical resistivity tomography with numerical resistivity modelling and synthetic inversion tests. The results of the two groups of synthetic resistivity model tests illustrate that anomalous bodies out of the plane of interest have an effect on two‐dimensional inversion and that the degree of influence of out‐of‐plane body on inverted images varies. The different influences are derived from two cases. One case is different resistivity models with the same electrode array, and the other case is the same resistivity model with different electrode arrays. Qualitative interpretation based on the inversion tests shows that we cannot find a reasonable electrode array to determine the best inverse solution and reveal the subsurface resistivity distribution for all types of geoelectrical models. Because of the three‐dimensional effect arising from neighbouring anomalous bodies, the qualitative interpretation of inverted images from the two‐dimensional inversion of electrical resistivity tomography data without prior information can be misleading. Two‐dimensional inversion with drilling data can decrease the three‐dimensional effect. We employed two‐ and three‐dimensional borehole‐to‐surface electrical resistivity tomography methods with a pole–pole array and a bipole–bipole array for mineral exploration at Abag Banner and Hexigten Banner in Inner Mongolia, China. Different inverse schemes were carried out for different cases. The subsurface resistivity distribution obtained from the two‐dimensional inversion of the field electrical resistivity tomography data with sufficient prior information, such as drilling data and other non‐electrical data, can better describe the actual geological situation. When there is not enough prior information to carry out constrained two‐dimensional inversion, the three‐dimensional electrical resistivity tomography survey is the better choice.     

EH4法勘查祥云米甸煤矿隐伏塌陷区效果

运用EH4电磁测深法布置剖面,结合岩矿石电性参数及地质资料分析,对剖面实测数据进行反演,较准确地识别出隐伏塌陷区、煤矿采空区及松散浮土层等地质异常区域及范围,较好地确定可能的地质灾害。     

一种新的曲线光滑算法—方向判别法

本文着重讨论了一种新的曲线光滑算法—方向判别法。并从理论和实验两个方面阐述了其优越性,最后对一幅经过计算机自动识别所获得的居民地轮廓作了光滑处理。实验表明:该算法可以较好地删除曲线上的冗余点,并且可以保持原图形的基本形状特征。     

变形:一个既沉重又轻松的话题——再议卡夫卡作品的“变形”主题

卡夫卡作品中的"变形"主题一直被认为是作者的人生悲观绝望情绪的体现,是消极、沉重的变形。其实,结合家庭伦理学、精神分析学和老庄哲学来分析,卡夫卡作品中的"变形"是矛盾统一的,它看似痛苦却已经超越痛苦,看似"异化"其实已经逃脱了异化,是一个既沉重又轻松的话题。     

云南泸西县云鹏水电站坝基基础工程处理

大坝基础帷幕灌浆工程中采用新技术、新工艺，使工程质量大幅提高，也使这些新技也能在实践中得到发展和完善，为工程良好的质量和效益打下了坚实的基础。