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Search Results: 1 - 10 of 19048 matches for " 崔中兴 "
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岩石软弱结构面抗剪强度的单试件确定法
中兴,宋克强
岩石工程学报 , 1996,
Abstract: 岩石软弱结构面抗剪强度的单试件确定法崔中兴宋克强(西安理工大学水电学院,710048)1前言在坝肩和坝基抗滑稳定分析中,岩石软弱结构面抗剪试验是取得岩石力学指标的重要手段。工程实践表明,抗剪强度是关系到工程安全和造价的基本资料,其中结构面抗剪强度尤为...
ON THE BEST OPERATOR OF INTERPOLATION IN W_2~1
W_2~1空间中的最佳插值逼近算子

明根,中兴
计算数学 , 1986,
Abstract: §1.问题的提法 设X是函数空间,{x_j}_1~n是给定的一组实数.由下式确定X上的一组泛函{I_j}_1~n: I_ju=u(x_j)≡ u_j,u(x)∈X,j=1,2,…,n 。 (1)设X_n是X的n维子空间,定义X上的算子H_n:
W_2~1空间中的最佳插值逼近算子
明根,中兴
计算数学 , 1986,
Abstract: §1.问题的提法设X是函数空间,{x_j}_1~n是给定的一组实数.由下式确定X上的一组泛函{I_j}_1~n:I_ju=u(x_j)≡u_j,u(x)∈X,j=1,2,…,n。(1)设X_n是X的n维子空间,定义X上的算子H_n:
北京市建材局推广新型建材取得成绩
中兴
工业建筑 , 1983, DOI: 10.13204/j.gyjz198302017
Abstract:
THE OPTIMAL NUMERICAL PRIMITIVE FUNCTION IN THE SPACE W_2~1
W_2~1空间中的最佳数值原函数

中兴,明根,吴勃英
计算数学 , 1989,
Abstract: By means of the regenerate kernel and the Schmidt orthorgonalization, a method for find-ing the numerical primitive function of a given function in the space W_2~1a, b] is constructed.The uniform convergence of the approximateprimitive function to the exact one as the nodesbecome dense in a, b] is also proved. The presented method is particularly applicable to largesystems of nodes. For small and medium scale systems of nodes, the corresponding results canstill be satisfactory because of a certain optimality of the numerical primitive function.
古刘滑坡的蠕变特征及其预报分析
宋克强,中兴,袁继国,李兵
岩石工程学报 , 1994,
Abstract: 本文通过野外调查、室内试验和模型试验,对古刘滑坡蠕变破坏过程作了较全面的论证.从而得到一些黄土滑坡的破坏规律,并提出预报蠕变滑坡的方法,可用于黄土滑坡的预报。
W_2~1空间中的最佳数值原函数
中兴,明根,吴勃英
计算数学 , 1989,
Abstract: 求数值原函数问题,是对离散形式给出的实函数u(x)(即仅给出u(x)在有限多个点上的函数值),求其近似原函数F_n(x),而且当节点无限加密时,F_n(x)收敛于u(x)的原函数F(x).例如微分方程的数值解法,实质上就归结为求数值原函数问题.通常
岩体抗剪强度参数的线性优化方法
李倩倩,黄栋,乔建平,中兴
岩土力学 , 2014,
Abstract: 针对岩体结构面力学参数的重要性,以大量工程实例为依据,以统计误差分析相关理论为基础,研究最小二乘法与m-估计法在分析结构面抗剪强度参数时的适用性。研究结果表明,在难以判断粗差的数量和比例时,很难对两种线性回归方法的优劣进行规律性的比较。考虑到数据是具有工程特性的,为更准确地处理实验数据,在以上两种方法的基础上提出了一种新的实验数据处理方法,并应用于计算李家河水库的抗剪强度参数。
基于数学形态学的套印偏差自动检测算法
高娟,中兴
计算机应用 , 2010,
Abstract: ?为了精确检测套印偏差,提出一种基于数学形态学的偏差自动检测算法。首先,对新形式色标采用多结构元素多尺度形态学边缘检测算法提取色标边缘;然后采用最小二乘拟合算法对其边缘进行拟合,得到套印色标圆的亚像素圆心坐标;最后经偏差计算公式获得准确的套印偏差数据。实验及实际测试结果表明,该算法且具有较强的抗扰性,能够满足高精度、实时的套印偏差检测要求。
MEASUREMENT OF CRACK WIDTH IN ROCK INTERIOR BASED ON X-RAY CT
基于X射线CT的岩石内部裂纹宽度测量

Ding Weihua,Wu Yanqing,Pu Yibin,Cao Guangzhu,Cui Zhongxing,
丁卫华
,仵彦卿,蒲毅彬,曹广祝,中兴

岩石力学与工程学报 , 2003,
Abstract: The deformation,propagation and expansion of crack in rock interior are the main mechanical process when the rock sample comes to its crack evolution stage. It is the subject of this paper how to detect the crack width through X-ray method. The relation between rock density damage and its volumetric strain is analyzed based on the meso-mechanism of rock deformation and rupture. For brittle rock,its volumetric strain has a unique quantitative relation with its density damage. Based on the increment formula of density damage,the volumetric strain formula is derived for rock. The universal calculation formula of crack width in rock interior is derived based on the volumetric strain formula. The formula is tested and compared with relative formula. The same results are obtained from the two different formulas. Two crack widths in rock interior under different stresses are calculated. As a result the problem how to measure a real-time crack width in rock interior is solved theoretically. The crack width of sandstone is no more than the order of magnitude of 10-1mm. It is verified that the actual crack width is not the same as the crack width in its CT image. Before the maximum strength,the crack width of sandstone has a stable expansion process. When the longitudinal and lateral deformation of rock sample are considered,this result can be verified indirectly.
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