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1.
云南九大高原湖泊的演变与生态安全调控 总被引:2,自引:0,他引:2
系统梳理了云南九大高原湖泊(滇池、洱海、抚仙湖、程海、泸沽湖、杞麓湖、星云湖、阳宗海、异龙湖)的演变历程,依据湖泊演化阶段、湖泊生态系统发育阶段、流域社会经济特征、湖泊富营养化阶段、水质类别、生态安全水平、主导功能核心导向划分9个湖泊的管理类型,并提出了预防型、控制型、治理型湖泊流域生态安全调控途径。 相似文献
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黄土边坡稳定性分析是一个不确定性问题,包含很多不确定性因素,而且土的抗剪强度可变性很大。在进行了大量实验的前提下,估计抗剪强度的可变性,运用概率的方法进行边坡的稳定性分析,计算黄土边坡的失稳概率。 相似文献
3.
Dirk De Clercq Inam Ul Haq Muhammad Umer Azeem Amna Hassan 《Canadian Journal of Administrative Sciences / Revue Canadienne des Sciences de l\u0027Administration》2020,37(3):197-210
Building on social exchange theory and attribution theory, this study unpacks the relationship between employees' perceptions of organizational politics and job performance, considering the mediating effect of career plateau beliefs and the moderating effect of leader interpersonal unfairness. The findings provide empirical support for the theoretical predictions. An important reason for which perceptions of dysfunctional organizational politics reduce job performance is that employees develop beliefs that opportunities for their career development are limited. This mediating role of career plateau beliefs is particularly salient to the extent that employees are exposed to organizational leaders who treat them with disrespect. Organizations can mitigate the risk that highly politicized decision-making processes lead to negative performance outcomes by stimulating fair interpersonal relationships. 相似文献
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高原水电站不同于其他的水电站,由于其地理位置特殊,水电站的重要性毋庸置疑,所以,对于高原水电站的更新改造工程至关重要。本文对高原水电站更新改造投资体系进行了思考。 相似文献
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古滑坡是一种不良地质现象,易诱发为地质灾害,对人类生命财产安全造成危害。本文以某古滑坡工程勘察实例为基础,对其成因及稳定性进行了分析评价,最后笔者得出了该古滑坡处于稳定状态,对工程影响不大,从而节约了工程投资。 相似文献
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引入职业高原理论,通过对民营零售企业员工的问卷调查,构建民营企业零售员工职业高原维度,分析职业高原与离职倾向的关系并提出相应的对策建议,从而帮助民营零售企业更好规划员工职业生涯,关注员工可能遭遇的职业高原现象,实现企业的可持续发展. 相似文献
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假如隧道在较长范围内沿着黄土冲沟走向或者与黄土塬边平行走向,而覆盖层又较薄或偏压很大,就会轻易发生较大的坍塌或滑坡现象。为此,本文分析了在黄土隧道开挖中产生坍塌的原因,对如何在施工中预防坍塌进行了简要的探讨。 相似文献
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Zhagana Agriculture-Forest-Animal Husbandry Composite System (ZCS) is the first Globally Important Agricultural Heritage Systems site in the Tibetan Plateau. Similar to many traditional agricultural regions, with the development of tourism and leisure agriculture, the peasant households in ZCS have gradually changed their livelihood strategies and livelihood activities in the past 10 years, resulting in the disappearance of some traditional farming methods and agricultural landscapes with a long history. By taking livelihood assets as the entry point and livelihood strategies as the core, this paper analyzed the basic situation of households’ livelihood and the transition mechanism of different livelihood strategies in order to offer suggestions for the dynamic conservation and sustainable development of Agricultural Heritage Systems (AHS). (1) The livelihood strategies of peasant households in ZCS can be divided into two major categories: specialized strategies and diversified strategies. (2) According to the empirical calculation of the livelihood asset accounting framework of AHS, the average livelihood asset value of peasant households in ZCS is 2.040, showing that the situation of peasant households’ livelihood is inadequate. (3) The transition of peasant households’ livelihood strategies from traditional strategy to specialized or diversified livelihood strategies is mainly influenced by natural assets, human assets, cultural assets, social assets and informational assets. In order to meet the growing material and spiritual needs of peasant households and achieve the sustainable development of ZCS simultaneously, it is suggested that the agriculture-forestry-animal husbandry-tourism composite strategies shall be taken as the development direction of peasant households’ livelihood strategies. 相似文献
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