桩式复合地基承载特性的研究

以桩式复合地基为对象,将复合地基视为由垫层、桩和桩间土所组成的一个工作体系,考虑其各部分的工作特性及其相互影响,分析研究了复合地基的受荷机理,影响桩土应力比和复合地基承载力的诸多因素等。     

八卦庙金矿床石英脉与金矿化关系再研究

八卦庙特大型金矿床是近年发现的产于秦岭地区泥盆系浅变质细碎屑岩中规模最大的微细浸染型金矿,金矿化与石英脉关系非常密切,经过大量分析数据统计表明,金矿石品位与其石英脉带的发育规律,脉体内外硫化物的含量成正比,与脉体的规整程度成反比,与脉体的厚度具有一定的关系。一般说,产于节理中的石英细脉的含金量比顺层产出的石英大脉的含金量高;石英脉的含金量高于脉旁围岩的含金量数倍甚至几十倍,含金石英脉与脉旁蚀变岩石     

重庆钢铁公司岸坡古滑坡系统形成机制研究

系统分析了重庆钢铁公司岸坡古滑坡系统的地质条件,提出了从新构造运动、河谷演变着手,依据系统发展的观点,研究滑坡系统形成机制的方法。分析结果表明该古滑坡系统由多级滑坡体组成,各滑体在时空上具有成生联系,目前滑坡系统除三角地带古滑体需整治外,其余地段均处于稳定状态。     

INTERACTION BETWEEN ATMOSPHERE AND OCEAN AND TELECONNECTION IN THE ATLANTIC DURING THE COLD SEASON

In this paper,the WA teleconnection pattern of SST in the Atlantic during the cold season is confirmed.The resultsshow the WA pattern of atmosphere is linked to the SST pattern and relative higher frequencies account for most of theWA signal.The linked pair of atmosphere and ocean patterns might be mutually supportive and exhibit“quasi-annualcycle”.The possible explanation for the polarity reversal of WA pattern is also discussed.     

Coulomb constitutive laws for friction: Contrasts in frictional behavior for distributed and localized shear

We describe slip-rate dependent friction laws based on the Coulomb failure criteria. Frictional rate dependence is attributed to a rate dependence of cohesionc and friction angle . We show that differences in the stress states developed during sliding result in different Coulomb friction laws for distributed shear within a thick gouge layer versus localized shear within a narrow shear band or between bare rock surfaces. For shear within gouge, shear strength is given by =c cos + _n sin, whereas for shear between bare rock surfaces the shear strength is =c cos + _n tan, where and _n are shear and normal stress, respectively. In the context of rate-dependent Coulomb friction laws, these differences mean that for a given material and rate dependence of the Coulomb parameters, pervasive shear may exhibit velocity strengthening frictional behavior while localized shear exhibits velocity weakening behavior. We derive from experimental data the slip-rate dependence and evolution ofc and for distributed and localized shear. The data show a positive rate dependence for distributed shear and a negative rate dependence for localized shear, indicating that the rate dependence ofc and are not the same for distributed and localized shear, even after accounting for differences in stress state. Our analysis is consistent with the well-known association of instability with shear localization in simulated fault gouge and the observation that bare rock surfaces exhibit predominantly velocity weakening frictional behavior whereas simulated fault gouge exhibits velocity strengthening followed by a transition to velocity weakening with increasing displacement. Natural faults also exhibit displacement dependent frictional behavior and thus the results may prove useful in understanding the seismic evolution of faulting.     

SUSTAINABLE URBAN-RURAL RELATION IN RAPID URBANIZATION AREAS——Case of Transformation of “Urban Village” in Guangzhou

Many studies have been made concerning the problems, characteristics, formation, transformation measures, etc. of urban village from sociology, urban planning and geography, etc., which have made insightful analysis. However, most of these studies started mainly from the standpoint of the city govemment, drumming for the land- scape-oriented urbanization, namely pulling-down the urban village and constructing the splendid residence or business buildings. The article maintains that the most important thing the city government should do is to pay much attention to the sustainable living of urban villagers, who would lose their main income source, namely, the collective dividend and the family housing rent. The single method of compensation has been proved to be harmful to the villagers＇ community, in which some young villagers relying on rent were no longer to do anything but stay at home. On the other hand, considering the floating population has become the main stream of renters in urban villages, the emergence of urban villages was inevitable and would continue to exist in a long time under the socio-economic transition in urban China and globalization. Based on the analysis above, the transformation of urban village should take more concerns on the housing demands of floating population besides compensation for local villagers. Meanwhile, it is necessary to avoid the “landscape-oriented urbanization” without the “peasant-to-citizen” transformation.     

完备格间保交并映射与保敛映射

论述完备格间保交并映射与保敛映射的性质,并给出其判定定理。     

About applying linear structural method on ocean data: Adjustment of satellite wave data

Linear structural relations express the linear relationship between random variables when each of the variables under consideration is subjected to inherent variability and measurement error. The linear structural method is more general than the classical regression, which is often used incorrectly in calibration of altimeter data or validation of wave model results. In this work the linear structural method is elaborated and applied for the adjustment of TOPEX/Poseidon (T/P) data by means of in situ measured wave data in the Aegean Sea. In addition, a comparison of the buoy and T/P data with the WAM wave model predictions is performed revealing an underestimation trend of the model.     

用模糊数学方法对地质变量排序

依据模糊等价关系分类的原理,提出地质变量之间的相关关系;利用模糊模式识别方法,对变量进行排序。     

On an improvement of a nonlinear iterative scheme for nonlinear wave profile prediction

The authors of the present paper present an iterative scheme to calculate the nonlinear wave profiles [Jang, T.S., Kwon, S.H., 2005. Application of nonlinear iteration scheme to the nonlinear water wave problem: Stokian wave. Ocean Engineering, in press]. The nonlinear operator was constructed from the dynamic boundary condition of the free surface. The initial input of the iterative process was linear potential. The linear dispersion relation was utilized. The authors of the present paper suggest an improved scheme in terms of accuracy and speed of convergence by utilizing the nonlinear dispersion relation. The existence and uniqueness of the improved scheme are illustrated in this paper. The calculation results together with Fast Fourier transform revealed that the improved scheme made it possible to predict higher-order nonlinear characteristics of the Stokes’ wave.