The New Progresses in Coupling Relations of Mountain-oasis-desert System

In this paper, the concepts and principles of mountain-oasis-desert system (MODS) are put forward according to the natural geographical situations in arid zone of western china. The spatiotemporal characteristics and dynamic changes of typical MODS, the process of material circulation, energy transform and information transmission among MODS and the mechanism of MODS interaction and symbiosis are analyzed. The foundation and frame of the coupling type are determined by landform types and climate characteristics: the spatial pattern of the coupling type is determined by the hydrological characteristics; the vegetation type reflects the appearance of the coupling type; the soil state restricts the function of the coupling type and the human activities influence the development course of the coupling type. Interface course of MODS is closely related to such medium as water, soil, air, etc., and water is the major medium during the course of material circulation, energy transform and information transmission. The disorder of water salt, water heat and water land restricts the stability of water ecosystem.     

Characteristics and laws of MODS coupling relation in arid zone under global change

Global change has influenced the distribution pattern and spatio-temporal changes of resources in arid zone, and has restrained the land use and land cover change, which is shown by water-heat state, landscape structure, climate effect, and human activities. The above-mentioned characteristics have a close coupling relation with the mountain-oasisdesert system （MODS）. The climate in Central Asia arid zone is warm and wet, which is different from that in northern China which takes a tendency of aridity, and the mechanism has restricted the characteristics and laws of MODS. Systematic interface characteristics and process, especially the formation, transformation and consumption laws of water resource reflect directly MODS＇s response to global change in arid zone. Spatio-temporal pattern, dynamic change, scale change and coupling mode of MODS reflect the ecology mechanism between the systems and within the systems.     

连续静脉一静脉血液滤过对多脏器功能障碍综合征肾功能衰竭患者的治疗价值分析

评价连续静脉—静脉血液滤过(CVVH)这种新的肾脏替代治疗技术在累及肾脏的多脏器功能障碍综合征患中的治疗价值，回顾分析本ICU开展CVVH前后所有出现肾功能衰竭的MODS患的治疗情况及预后。结果发现，在CVVH开展前后，该类患接受肾脏替代治疗的比率分别为43．3％和81．5％，死亡率分别为66．7％和40．7％，两项指标均有显差异。说明CVVH能使出现ARF的MODS患更易接受肾替代治疗，并降低该类患的死亡率。     

元数据MODS及其应用前景展望

介绍了MODS的特点,分析了其元素结构,根据国外对MODS的应用和尝试.探讨了目前MODS的主要应用模式以及对国内图书馆界的启示.     

3种心脏手术风险评估系统的应用研究

目的应用3种心脏手术风险评估系统对冠状动脉旁路移植术(CABG)进行预后指导,建立适合冠状动脉旁路移植术的风险评估系统.方法采用MODS,SOFA及COAS评分系统进行评分,比较3个系统对心脏术后风险评估的敏感性和特异性.结果分析比较3个系统的当日分值、Max分值、Max3d分值、Δ分值的ROC曲线下面积,MODS系统为0.602,0.847,0.838,0.767;SOFA系统为0.571,0.830,0.814,0.779;COAS系统为0.821,0.929,0.919,0.780;COAS系统各时段ROC曲线下面积均大于MODS和SOFA系统.结论 COAS系统在CABG术后风险评估的敏感性和特异性优于MODS和SOFA系统.