夹皮沟地区金矿地球化学异常模式及深部成矿预测

在总结夹皮沟地区金矿勘查地球化学特征的基础上,提出了该区金矿地球化学异常模式.通过坑道岩石地球化学测量成果,进行因子分析、点群分析及趋势分析.综合元素垂直分劳、分劳序列的计算、Ag、Au剩余异常等多种信息对三道岔金矿床深部进行了预测,并取得良好的效果.     

Spatial decision support applications based on three-dimensional city models

The basic mathematic models, such as the statistic model, the time-serial model, the spatial dynamic model etc., and some typical analysis methods based on 3DCM are proposed and discussed. A few typical spatial decision making methods integrating the spatial analysis and the basic mathematical models are also introduced, e.g. visual impact assessment, dispersion of noise immissions, base station plan for wireless communication. In addition, a new idea of expectation of further applications and add-in-value service of 3DCM is promoted. As an example, the sunshine analysis is studied and some helpful conclusions are drawn.     

Flexural performances of prestressed high strength concrete piles reinforced with hybrid GFRP and steel bars

Abstract

This study developed prestressed high-strength concrete (PHC) piles reinforced with high-strength materials (glass fiber-reinforced polymer (GFRP) bars) for flexural performance enhancement. Flexural strengths and behaviors of PHC piles reinforced with hybrid GFRP and steel bars were experimentally investigated, respectively. Large-scale specimens with total lengths of 12,000?mm and diameters of 600?mm were constructed and tested under bending, accompanied by evaluation of effects of non-prestressed reinforcement type and longitudinal reinforcement ratio. J-factors were calculated to evaluate deformability of all the specimens. PHC piles reinforced with GFRP bars were demonstrated to have much higher flexural capacity than those reinforced with steel bars. Moreover, strains at the midspans of cross sections of all the specimens basically conformed to the assumption of plane section. Failure of PHC piles reinforced with GFRP bars was attributable to gradual concrete crushing, while that of PHC piles reinforced with steel bars resulted from steel yielding. Results of this study were expected to provide theoretical basis for wide engineering applications of PHC piles reinforced with hybrid GFRP bars and steel bars in marine structures.     

耿达短水准异常与汶川8.0级地震

结合龙门山断裂带其他跨断层资料,对耿达短水准在汶川8.0级地震前后的观测资料进行了重新分析,发现耿达短水准在汶川地震前后的异常为当地居民修建生活小区所致,不应视为地震前兆异常。     

论热动平衡判据有关的几个问题

对平衡态和线性准平衡态的稳定性及其与力学中相关概念的相似问题作了论述，并就蒸气中液滴的不稳定性进行了讨论。     

Protective effect of topically applied polypeptide from Chlamys farreri against ultraviolet radiation-induced chronic skin damage in guinea pig

Polypeptide fromChlamys farreri (PCF), a topical polypeptide isolated fromChlamys farreri, was used in this experiment aimed to investigate the photoprotective effect of PCF against chronic skin damage induced by ultraviolet A (UVA) and ultraviolet B (UVB) radiation. The chronic ultraviolet-irradiated guinea pig model was established, and visible changes in the skin including wrinkling, sagging and erythema were observed. Malondialdehyde (MDA) and antioxidant enzymes including superoxide dismutase (SOD) and glutathione peroxidase (GSH-px) in the dorsal skin were determined using biochemical methods. The results showed: (1) PCF (5 % and 20%) could greatly protect the dorsal skin of guinea pig against wrinkling, sagging and erythema induced by UV radiation in a concentration-dependent manner. (2) PCF could reduce MDA formation in the dorsal skin caused by UV irradiation, while increasing the activities of SOD and GSH-px. (3) The differences among the PCF groups and UV model group were significant (P<0.05,P<0.01). These results indicated that topical application, of PCF provided broad solar UV spectrum photoprotection; and that the antioxidant property of PCF might play a role in photoprotection. Project No. 39970638 supported by the NSFC, and the Science and Technology Bureau of Qingdao (No. 2001-28-50).     

南海及邻区地壳上地幔三维S波速度结构的面波波形反演>.

对南海及邻区中国数字地震台网４个台站接收到的328条长周期地震记录的面波波形进行分块波形反演．分块波形反演把大尺度的优化问题转化为小尺度的优化问题，采用非线性优化方法求解，从而得到南海及邻区22网格划分、从地表深至430ｋｍ 的地壳上地幔三维S波速度结构，并用检验板法进行了分辨率分析．结果表明，海域、岛弧和大陆在速度分布、岩石圈和软流圈存在明显的结构差异．      

1986—1987年北半球冬季亚澳地区大气环流异常及其与西太平洋SST异常的联系

1986—1987年冬季亚澳地区大气环流异常主要表现在北半球中纬盛行纬向气流,副热带西风急流、西太平洋副热带高压脊及ITCZ位置异常偏北;西北太平洋热带气旋活动频繁;赤道盛行异常西风和异常南风;澳大利亚海平面气压偏高等现象。在这种大气环流异常形势下,东亚地区冬季风偏弱,冷空气主要在偏北地区东移,温度异常偏高,中国北方降水偏多,南方降水偏少。与此同时,澳大利亚夏季风偏弱并推迟一个月建立,整个澳大利亚地区降水偏少。大气环流异常是从低纬开始的。ITCZ位置异常偏于北半球,比其他环流系统异常要早一个月以上发生。1986年夏季以来,西太平洋赤道附近及其偏北地区SST始终维持异常偏高,可能是造成ITCZ异常偏北的原因,并进而引起瓦克环流减弱和南方涛动指数(SOI)偏低,从而对1986—1987年的ENSO事件的发生起了促进的作用。1986年夏秋季节西北太平洋30°N950hPa上北风异常,冬季南风异常又可能是引起西太平洋SST异常分布的原因,因此,1986—1987年冬季亚澳地区的异常事件必须从海—气相互作用的观点来加以说明。      

溶液和温度作用下膨润土防水毯的渗透性能

以颗粒状和粉末状膨润土防水毯(GCLs)为对象,运用GDS (global digital systems)全自动渗透仪开展渗透试验,研究CaCl_2溶液作用下GCLs渗透性能的温度效应,初步探讨其机理。试验表明:当水化液为0.05mol/L的CaCl_2溶液时,两种GCLs渗透系数随温度升高呈现增大趋势;当水化液为去离子水时,颗粒状GCL渗透系数随温度升高而减小,粉末状GCL渗透系数随温度升高而增大。去离子水情况下,膨润土吸附结合水量随温度升高而减小;CaCl_2溶液作用下,吸附结合水量较去离子水情况大幅降低。当CaCl_2溶液浓度一定时,膨润土膨胀指数随温度升高而略有增大;当温度一定时,膨润土膨胀指数随CaCl_2溶液浓度升高而显著减小。以去离子水进行试验时:颗粒状和粉末状GCLs渗透系数随温度的变化主要影响因素为凝胶态蒙脱石数量,其次为流体黏滞系数和吸附结合水量;颗粒状GCLs膨润土孔隙结构越不均匀,凝胶态蒙脱石数量的影响就越显著,导致渗透系数随温度升高而减小、固有渗透率随温度升高显著降低。以CaCl_2溶液进行试验时,两种GCLs渗透系数随温度变化的主要受流体黏滞系数和吸附结合水量的影响,而受凝胶态蒙脱石数量的影响较小。孔隙溶液性质、温度和膨润土类型均对GCLs的防渗性能具有重要影响。     

织金洞扫尾豪猪粪堆积层的孢粉组合及其地质意义

通过对贵州织金洞扫尾豪猪粪堆积层孢粉组合分析研究及￣（１４）Ｃ年龄测定,明显地反映出织金洞地区近６７１０±１３０ａ来的古植被和古气候均属北亚热带的植被面貌及气候特征。划分出的四个孢粉带所反映的植被演替过程为:松占优势,混有桦、栎常绿阔叶的针叶林→松占优势,含五加,栋和山核桃的针叶阔叶混交林→松占优势,栋、五加和桦增多的针叶阔叶混交林→松为主,混有胡桃、五加和榆落叶阔叶的针叶林;相应的气候变化是:温和偏湿→温暖偏干→温暖湿润→温凉干燥。