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Ali M De Francisco A Khan MM Chakraborty J Myaux J 《International journal of population geography : IJPG》1999,5(1):19-29
Substantial variation in contraceptive prevalence rates (CPRs) and fertility rates (FRs) between community health workers (CHWs) has been documented since the inception of the Matlab family planning program in rural Bangladesh. The coefficients of variation of these indicators for Matlab CHWs were 7% and 26%, respectively, in 1995. To identify the reasons for these performance variations, geographical information system (GIS) approaches were applied to longitudinal and cross-sectional data on 80 CHWs for the period 1980-95. Each observation in the data-set included catchment area-specific characteristics, measures of CHW efficiency in service delivery, and CHW-specific characteristics for one specific year. A one-unit increase in the average age of target women in the catchment area increases the CPR by 9.2%. The CPR increases by 0.2% for each 1% increase in women's literacy and decreases by 0.1% for each 1% increase in the number of Muslim households in the catchment area. An increase of 1 sq. km in the size of the catchment area reduces the CPR by 3%. CHW performance increases with age up to 45 years and then decreases. Similarly, a 1-year increase in the average age of target women reduces the FR by 2%. A 10% increase in the size of the catchment area reduces program performance by increasing the FR by 1.4%. A single geographic barrier to movement increases the FR by 1%. This analysis indicates that CHW performance can be improved significantly by defining catchment areas through use of GIS techniques. Without knowledge of the spatial distribution of population and the physical barriers to movement, allocating a fixed number of clients per CHW may not be the most efficient approach. 相似文献
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地震趋势区划结构自适应模型 总被引：3，自引：0，他引：3
简要地回顾了现有的地震区划方法，针对综合概率法需要进一步解决的“地震活动性时空不均匀性”问题，提出了包括趋势项、周期项、随机项和白噪声项等内容的结构模型及用于模型选择的系统。在结构模型中，不同的项目自适应等不同方法进行标定，其和就是震级上限的预报值。 相似文献
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用不同的采样间隔５０μｍ、７５μｍ与１００μｍ的数字影像，所量测之结果与解析测图仪ＢＣ２量测结果作了比较，得到了有益的结果，并概要地介绍了ＤＶＰ之功能与操作。 相似文献
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利用地理信息系统（GIS）进行地质灾害和风险评估：研究方法和模型… 总被引：2，自引：0，他引：2
在哥伦比亚麦德林市西北部市区，用地理信息系统对地灾害、脆弱性和风险进行了鉴定和评价。在灾害评价中考虑了七种因素：基岩和地表地质条件、构造地质条件、气候、地形、地貌单元及其形成作用、土地利用和水文条件。 相似文献
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