甲壳胺人工皮—CHIMEHERB治疗不同类型创面初步结果     

李良平  娄培友  陈志伟 《中国海洋大学学报(自然科学版)》1989,(Z3)

本文报告了1989年1月至12月使用甲壳胺人工皮治疗94例不同类型创面,其中手部创伤66例,烧伤5例,其它创面17例。结果断层皮肤损伤愈合良好,小面积全层皮肤损伤愈合后有少量疤痕形成,在手外伤中,以指端损伤效果较好,采用此疗法,方法简单,易于推广。  相似文献   

Friction Characteristics at the Pipe-Soil Interface     

Yan Shuwang Yan Chi Professor 《中国海洋工程》1994,(2)

-In order to analyze the stability of pipelines on the sea bed, the friction characteristics at the pipe-soil interface were examined by means of special direct shear tests. High density polythene was used as the surface of the pipe, which is a widely-utilized material for the outer cover of the pipe to prevent sea water corrosion. Sands of different gradings were tested. The reconstituted soft clay taken from the Bohai area was consolidated to different degrees of consolidation by the vacuum preloading technique, and tested.  相似文献   

Residential satisfaction and the propensity to move: an analysis of potential movers from marginal settlements in Costa Rica     

Griffin-wulff M  Chi Psk 《Singapore journal of tropical geography》1980,1(1):16-22

The authors use 1974 survey data from three marginal communities in the city of Limon, Costa Rica, to examine the propensity of settlers in such communities to move voluntarily. In particular, the concept of residential satisifaction is examined and refined  相似文献   

CO<Subscript>2</Subscript>-rich fluid inclusions with chalcopyrite daughter mineral from the Fenghuangshan Cu–Fe–Au deposit,China: implications for metal transport in vapor     

Jianqing Lai  Guoxiang Chi 《Mineralium Deposita》2007,42(3):293-299

CO₂-rich fluid inclusions containing opaque mineral crystals were found in the Fenghuangshan skarn-porphyry Cu–Fe–Au deposit in Tongling, Anhui, China. These inclusions show variable CO₂ contents and are accompanied by aqueous inclusions, both occurring as secondary inclusions in quartz and being locally associated with chalcopyrite mineralization. Laser Raman microspectroscopic analyses confirm the predominance of CO₂ in the vapor and the presence of H₂S as high as 8 mol%, and identify the opaque mineral with yellow reflectance color in the inclusions as chalcopyrite. More than half of the CO₂-bearing inclusions contains chalcopyrite, whereas few of the associated aqueous inclusions do so. The chalcopyrite, occupying less than 1% (volume) of the inclusions, is interpreted to be a daughter mineral, and calculated Cu concentrations in the inclusions range from 0.1 to 3.4 wt%. Copper is inferred to have been transported in CO₂-dominated fluids as HS⁻ complexes. The occurrence of chalcopyrite daughter crystals in CO₂-rich fluid inclusions indicates that CO₂-rich vapor has the capacity of transporting large amounts of Cu, and possibly Au. This finding has significant implications for metal transport and mineralization in hydrothermal systems enriched in CO₂, such as orogenic-type and granitic intrusion-related gold deposits.  相似文献   

Performance studies on six heuristic global optimization methods in the location of critical slip surface   总被引：5，自引：0，他引：5  

Y.M. Cheng  L. Li  S.C. Chi 《Computers and Geotechnics》2007,34(6):462-484

Recently, many heuristic global optimization algorithms have evolved with success for treating various types of problems. Majority of these algorithms have not been applied to slope stability problem for which the presence of soft band and convergence problem (discontinuity of the objective function) may create difficulties in the minimization process. In this paper, six heuristic optimization algorithms are applied to some simple and complicated slopes. The effectiveness and efficiency of these algorithms under different cases are evaluated, and it is found that no single method can outperform all the other methods under all cases, as different method has different behavior in different types of problems. For normal cases, the particle swarm method appears to be effective and efficient over various conditions, and this method is recommended to be used. For special cases where the objective function is highly discontinuous, the simulated annealing method appears to be a more stable solution.  相似文献   

Seismic response control of a building complex utilizing passive friction damper: experimental investigation     

Chi‐Lun Ng  You‐Lin Xu 《地震工程与结构动力学》2006,35(6):657-677

Multi‐storey main buildings constructed with a low‐rise podium structure possess some architectural merits but the setback features of such a building complex may lead to seismic response enlargement of the main buildings. This paper explores the possibility of using passive friction dampers to connect the podium structure to the main buildings to prevent their seismic response enlargement without violating the architectural features. A series of shaking table tests were carried out on one 3‐storey and one 12‐storey building models in fully‐separated, rigidly connected, and friction damper‐linked configurations. Four sets of seismic ground motions were selected as inputs to the shaking table. The control competence of two buildings linked with friction damper was evaluated by comparison of their responses with those from fully‐separated and rigidly connected cases. Experimental results showed that unfavourable seismic response amplification did occur in the building complex in the rigidly connected case. By contrast, friction damper showed effectiveness in reducing absolute acceleration and interstorey drift responses of both buildings if friction force level was appropriately applied. Copyright © 2005 John Wiley & Sons, Ltd.  相似文献   

VS型垂直摆倾斜仪标定计算程序     

池海江  秦占梅  王长江  马喜龙 《地震地磁观测与研究》2003,24(5):90-92

VS型垂直摆倾斜仪是新投入使用的一种地倾斜观测仪器，为提高其标定准确性，应用VB语言编程，进行自动取值计算，可方便快捷、准确地计算格值，提高地震观测资料的可靠性。  相似文献   

台站环境实时监测的重要性及其作用     

郭金华  刘宁  池建军 《地震地磁观测与研究》2003,24(3):81-86

简要介绍在Adapt数字地震遥测台网系统中对台站环境因素进行实时监测的工作原理，分析和阐述了此模块功能在日常台网运行管理工作中的重要性及其主要作用。  相似文献   

吉林省双阳水库灌区灌溉水源置换可行性研究   总被引：1，自引：0，他引：1  

迟宝明  戴长雷  易树平  李治军 《世界地质》2003,22(3):284-289,312

双阳水库供水为优先满足城区需求和农业可持续发展,其水库灌区需进行灌溉水源置换。基于时序分析与回归分析的迭合模型模拟预测双阳水库来水量和区间降水量,并采用迦辽金有限单元数值差分法对区间地下水系统进行模拟求解,计算结果表明,新条件下灌区可能获得的水资源量为4 026.6×104m3/a;大于总需水量3 314.6×104 m3/a;从资源承载力的角度看,水源置换是可行的。对区内现状及规划中的取供水工程分析计算可知,灌区工程供水能力可达3 536.0×104 m3/a,大于总需水量;从工程承载力的角度看,水源置换亦是可以实现的。同时注意到,即使在水源置换以后,灌区的水供应对双阳水库的依赖程度仍然很高,如果水库对城区的供水量大幅增加,则灌区在置换后建立的水资源平衡将可能被打破。  相似文献   

34000年以来南极汞沉降通量的估算          下载免费PDF全文

尹雪斌  孙立广  谢周清 《极地研究》2003,15(3):207-213

本文统计分析了南极DomeC冰芯中汞含量和降水指征参数δ1 8O值、1 0 Be浓度的关系 ,发现冰芯中Hg含量和δ1 8O值、1 0 Be浓度变化一致 ,表明DomeC冰芯汞含量受到冰雪积累率的影响 ,而且三者变化的高度同步性可能说明其原始驱动力也是一致的 ,从而冰芯中Hg含量可以和1 0 Be浓度一样作为冰雪积累率估算的替代性指标。此外 ,利用δ1 8O数据 ,系统估算了 340 0 0年以来南极汞沉降通量的变化。结果表明 ,DomeC冰芯汞沉降通量在末次冰盛期 (LGM)最高 ,为 3.80pgcm- 2 a- 1 ,约是全新世汞沉降通量 ( 1 .0 8pgcm- 2 a- 1 )的 3.5倍 ,该变化可能主要受到汞的自然排放量影响。  相似文献