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“劫富济贫”与和谐社会 总被引:1,自引:0,他引:1
"替天行道,劫富济贫"一直被梁山英雄挂在嘴边,在中国一直被认为是好汉行为,是劳动人民无可非议的正当要求。但梁山英雄们实际上没有遵守自己的诺言,而是把劫来的财富占为己有。《水浒传》"劫富济贫"思想对我们今天和谐社会建设有一定的启示:我们应缩小贫富差距,消除仇富心理;关注弱势群体,提高社会保障;调节利益关系,崇尚共同富裕。 相似文献
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How is diversity maintained? Environmental heterogeneity is considered to be important, yet diversity in seemingly homogeneous environments is nonetheless observed. This, it is assumed, must either be owing to weak selection, mutational input or a fitness advantage to genotypes when rare. Here we demonstrate the possibility of a new general mechanism of stable diversity maintenance, one that stems from metabolic and physiological trade-offs. The model requires that such trade-offs translate into a fitness landscape in which the most fit has unfit near-mutational neighbours, and a lower fitness peak also exists that is more mutationally robust. The 'survival of the fittest' applies at low mutation rates, giving way to 'survival of the flattest' at high mutation rates. However, as a consequence of quasispecies-level negative frequency-dependent selection and differences in mutational robustness we observe a transition zone in which both fittest and flattest coexist. Although diversity maintenance is possible for simple organisms in simple environments, the more trade-offs there are, the wider the maintenance zone becomes. The principle may be applied to lineages within a species or species within a community, potentially explaining why competitive exclusion need not be observed in homogeneous environments. This principle predicts the enigmatic richness of metabolic strategies in clonal bacteria and questions the safety of lethal mutagenesis as an antimicrobial treatment. 相似文献
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杨实如 《成都大学学报(自然科学版)》1995,14(2):16-23
本文运用材料力学假设求出小曲率圆环挠曲线微分方程的通解,并以实例说明如何利用此通解计算圆环的位移及内力。最后将飞轮轮缘作为一个特殊圆环,建立轮缘位移及内力的计算公式。 相似文献
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本文介绍了近几年我校在适应高校仪器设备管理的新要求,探索高校仪器设备管理的新规律、新办法,在健全管理规章制度、简化办事程序、注重管理队伍建设和建立信息平台所做的工作和取得的成绩. 相似文献
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探索了网络环境下高校图书馆员的职业压力及其对他们身心健康的影响,分析了职业压力的来源及职业压力所导致的问题,提出了应对策略。 相似文献
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孟彩荣 《山西大同大学学报(自然科学版)》2014,(6):22-23
导出了在发射源静止系粒子的赝快度分布,分析了用快度变量来表示能量和纵向动量及在不同的参照系下快度变量之间的关系。最后,推导出快度变量与赝快度变量之间的相互关系。 相似文献