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991.
Research on leadership and creativity is dominated by the study of leadership from people in formal leadership positions. The very nature of creativity requires self‐direction, however. This points to shared leadership, a process in which members dynamically share the leadership role, as a particularly relevant influence to consider. Drawing on psychological empowerment theory, we develop the shared leadership perspective on individual creativity. We argue that shared leadership has a cross‐level influence on individual creativity that is mediated by the experience of meaning of work and moderated by individual differences in power distance value: for individuals lower on power distance, shared leadership has a positive linear relationship with individual creativity; for individuals higher on power distance, shared leadership has a curvilinear relationship with individual creativity that is decreasingly positive. Using a sample of 623 members from 95 teams in 34 Chinese organizations, we find support for this multilevel model. Findings offer theoretical implications for shared leadership and creativity research and provide managerial implications. 相似文献
992.
993.
Total pollution effect of urban surface runoff 总被引:3,自引:1,他引:2
LUO Hongbing LUO Lin HUANG Gu LIU Ping LI Jingxian HU Sheng WANG Fuxiang XU Rui HUANG Xiaoxue 《环境科学学报(英文版)》2009,21(9):1186-1193
For pollution research with regard to urban surface runo , most sampling strategies to date have focused on di erences in land usage.
With single land-use sampling, total surface runo pollution e ect cannot be evaluated unless every land usage spot is monitored.
Through a new sampling strategy known as mixed stormwater sampling for a street community at discharge outlet adjacent to river,
this study assessed the total urban surface runo pollution e ect caused by a variety of land uses and the pollutants washed o from the
rain pipe system in the Futian River watershed in Shenzhen City of China. The water quality monitoring indices were COD (chemical
oxygen demand), TSS (total suspend solid), TP (total phosphorus), TN (total nitrogen) and BOD (biochemical oxygen demand). The
sums of total pollution loads discharged into the river for the four indices of COD, TSS, TN, and TP over all seven rainfall events were
very di erent. The mathematical model for simulating total pollution loads was established from discharge outlet mixed stormwater
sampling of total pollution loads on the basis of four parameters: rainfall intensity, total land area, impervious land area, and pervious
land area. In order to treat surface runo pollution, the values of MFF30 (mass first flush ratio) and FF30 (first 30% of runo volume)
can be considered as split-flow control criteria to obtain more e ective and economical design of structural BMPs (best management
practices) facilities. 相似文献
994.
人工湿地污水处理系统中氧化亚氮的释放规律研究 总被引:2,自引:2,他引:0
利用静态箱-气相色谱法研究了潜流和表面流人工湿地系统中N2O的释放规律和相关的氨氧化细菌.结果表明,潜流和表面流人工湿地的N2O平均通量分别为296.5μg.(m2.h)-1和28.2μg.(m2.h)-1,总体上均表现为大气N2O的排放源,前者的N2O平均释放通量高于农田、森林、草原和沼泽湿地等生态系统,潜流方式促进了N2O的释放.潜流和表面流人工湿地N2O通量有较大的月份差异和明显的日变化特征,最高值出现在7月,分别为(762.9±239.3)μg.(m2.h)-1和(91.9±20.3)μg.(m2.h)-1,一天中的极大值和极小值分别出现在中午和凌晨.温度和芦苇的生长情况对N2O通量有一定的影响.人工湿地系统进水端,较高浓度的污水和充足的碳、氮源,促进了硝化和反硝化过程,使得N2O通量均高于出水端.克隆结果表明,人工湿地污水处理系统中与N2O产生相关的氨氧化细菌主要为Nitrosomonas和Nitrosospira. 相似文献
995.
Seasonal variation of potential denitrification rates of surface sediment from
Meiliang Bay, Taihu Lake, China 总被引:7,自引:0,他引:7
Jicheng Zhong Chengxin Fan Guofeng Liu Lei Zhang Jingge Shang Xiaozhi Gu 《环境科学学报(英文版)》2010,22(7):961-967
The regulatory effects of environmental factors on denitrification were studied in the sediments of Meiliang Bay, Taihu Lake, in a monthly sampling campaign over a one-year period. Denitrification rates were measured in slurries of field samples and enrichment experiments using the acetylene inhibition technique. Sediment denitrification rates in inner bay and outer bay ranged from 2.8 to 51.5 nmol N2/(g dw (dry weight)·hr) and from 1.5 to 81.1 nmol N2/(g dw·hr), respectively. Sediment denitrification rates were greatest in the spring and lowest in the summer and early autumn, due primarily to seasonal differences in nitrate concentration and water temperature. For each site, positive and linear relationships were regularly observed between denitrification rate and water columnn itrate concentration. Of various environmental factors on denitrification that we assessed, nitrate was determined to be the key factor limiting denitrification rates in the sediments of Meiliang Bay. In addition, at the two sites denitrification rates were also regulated by temperature. The addition of organic substrates had no significant effect on denitrification rate, indicating that sediment denitrification was not limited by organic carbon availability in the sediments. Nitrate in the water column was depleted during summer and early autumn, and this suppressed effective removal of nitrogen from Taihu Lake by denitrification. 相似文献
996.
地面破坏效应强烈和地震地质灾害严重是汶川Ms8.0地震震害效应的显著特点。地震地质灾害的分布与地震断层的分布密切相关,同时还受自然地理、地层岩性、地质构造和人类活动的影响和控制。论文结合北川县场地条件的分析,对汶川Ms8.0地震中北川县地震地质灾害的发育特征、形成条件及诱发因素进行了系统总结。地震地质灾害分布与地震断层的关系表明地震对次生地质灾害起到了主要的控制与触发作用。 相似文献
997.
采用比色管水浴消解水样以分光光度法测定总铬。结果表明:该法具有较高的氧化效率,精密度和准确度均优于标准方法,是测定水中总铬的理想方法。 相似文献
998.
999.
以资源、能源为依托的工业结构和粗放的增长方式是内蒙古工业的主要特点,也是实现节能减排目标的瓶颈。通过淘汰落后生产能力、加快接续产业发展、推动资源型产业发展高端和集成产品、促进节能减排技术的研发和应用、发展循环经济以及建立配套的政策、法规体系,力促内蒙古工业实现节能减排目标,走出一条资源节约与环境友好的新型发展道路。 相似文献
1000.
针对当前环保信访工作中环境污染信访案例的特点,分析形成重复信访的原因,并结合工作实践,提出了解决基层重复信访的对策。 相似文献