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太阳能热水系统引入空气源热泵和管路系统的探讨
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作者 艾磊 《机电产品开发与创新》 2021年第6期25-27,共3页
我国高原地区拥有丰富的太阳能资源,非常适宜房屋建筑安装各种太阳能设备,但由于地区特性,经常出现极端天气,容易造成太阳能热水系统给水管道破裂,影响其正常工作。基于此,为保障高原农村居民正常使用热水,保护热水系统不被损坏,在其安... 我国高原地区拥有丰富的太阳能资源,非常适宜房屋建筑安装各种太阳能设备,但由于地区特性,经常出现极端天气,容易造成太阳能热水系统给水管道破裂,影响其正常工作。基于此,为保障高原农村居民正常使用热水,保护热水系统不被损坏,在其安装时就应采取空气源热泵技术,来保障管道的安全。管道系统经过空气源热泵机组的持续补热,就能一直处于恒温状态,不受冰冻影响,同时相关技术的应用,也能降低电量消耗,符合可持续发展的要求。 展开更多
关键词 高原地区农村 太阳能 空气源热泵
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The Influence of Gender and Other Characteristics on Rural Laborers' Employment Patterns in the Mountainous and Upland Areas of Sichuan,China 被引量:3
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作者 XIE Fang-ting Xu Ding-de +1 位作者 LIU Shao-quan CAO Meng-tian 《Journal of Mountain Science》 SCIE CSCD 2015年第3期769-782,共14页
This study examines gender differences in rural laborers‘ employment patterns in the mountainous and upland areas of Sichuan, China. The analysis employs both representative survey data of 400 households and geograph... This study examines gender differences in rural laborers‘ employment patterns in the mountainous and upland areas of Sichuan, China. The analysis employs both representative survey data of 400 households and geographical data. Multinomial logistic regression models are used to analyze the influences of gender, among other factors, on employment decisions of rural males and females, where the factors considered include personal, household, community natural environmental characteristics. Dividing laborers into four categories, we find that the proportions of males who participating in on-farm, pluriactive, and off-farm work, and unemployment were 24.41%, 28.64%, 46.27%, and 0.68% respectively, while that of females who participating in on-farm, pluriactive, and offfarm work, and unemployment were 43.20%, 13.95%, 30.95%, and 11.90% respectively. As to individual characteristics, age(AGE) and physical condition(PHY) effects appeared to be more pronounced for men, while education(EDU) and marital status(MAR)effects appeared to be more pronounced for women. Regarding household and community characteristics, the effects of the presence in the household of children aged 6-(CHI), number of persons in the household(POP), and labor force(LAB), per capitaincome in village(INCV), and the development status of village enterprises(ENT) on women were greater than that on men. In addition, the presence in the household of elderly individuals aged 65+(OLD) and time to reach the nearest township(TIME) are shown to have opposite impacts on men and women. While the presence in the household of pupils(PUP) and per capital gross value of industrial output(GVIO) was found to be irresponsive to men and women taking pluriavtivity and off-farm job. With respect to natural environments characteristics, the effects on men were opposite of those on women. Unemployment of women was found to be particularly responsive to household characteristics. A multinomial regression approach is undertaken to analyze rural males‘ and females‘ decisions of the four employment patterns considered, an approach that reveals considerable heterogeneity that is concealed by the dichotomous approach employed in most previous studies. The study thus contributes to our understanding of rural employment patterns and gender difference in mountainous and upland areas. 展开更多
关键词 GENDER Pluriactivity Off-farmemployment Mountainous areas
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