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811.
812.
气候变化对我国水文水资源系统的影响研究 总被引:2,自引:0,他引:2
旨在介绍气候变化对我国水文水资源系统影响研究的进展、方法、技术及其优缺点,并分析气候变暖对我国水文水资源系统的影响结果,同时提出自己的一些建议。 相似文献
813.
814.
中空纤维膜生物反应器处理造纸废水 总被引:7,自引:0,他引:7
膜生物反应器是将膜分离技术与生物处理工艺相结合而开发的新型系统,是近年来新发展起来的高效废水处理技术。本实验采用了中空纤维膜组件和活性污泥反应器组成的分置式膜生物反应器,研究其在造纸废水处理中的特性影响因素。 相似文献
815.
This paper introduces a functional-structural plant model based on artificial life concepts and L-systems. This model takes into account realistic physiological rules, the architecture of the plants and their demography. An original benefit of this approach is that it allows the simulation of plant evolution at both functional and life-history levels implementing mutations to the L-systems and a set of genetic parameter values. The conducted experiments focus on the evolutionary emergence of different life history strategies in an environment with heterogeneous resource availability and disturbance frequency. It is found that, depending on the encountered conditions, the plants develop three major strategies classified as competitors, stress-tolerators and ruderals according to Grime's CSR theory. Most of the evolved characteristics comply with theoretical biology or field observations on natural plants. Besides these results, our modelling framework is highly flexible and many refinements can be readily implemented depending on the issues one intends to address. Moreover, the model can readily be used to address many questions at the interface between evolutionary ecology, plant functional and community ecologies and ecosystem ecology. 相似文献
816.
《Traffic injury prevention》2013,14(4):363-369
In conjunction with a nationwide motorcycle safety program, the provision of exclusive motorcycle lanes has been implemented to overcome link-motorcycle accidents along trunk roads in Malaysia. However, not much work has been done to address accidents at junctions involving motorcycles. This article presents the development of predictive model for motorcycle accidents at three-legged major-minor priority junctions of urban roads in Malaysia. The generalized linear modeling technique was used to develop the model. The final model reveals that motorcycle accidents are proportional to the power of traffic flow. An increase in nonmotorcycle and motorcycle flows entering the junctions is associated with an increase in motorcycle accidents. Nonmotorcycle flow on major roads had the highest effect on the probability of motorcycle accidents. Approach speed, lane width, number of lanes, shoulder width, and land use were found to be significant in explaining motorcycle accidents at the three-legged major-minor priority junctions. These findings should enable traffic engineers to specifically design appropriate junction treatment criteria for nonexclusive motorcycle lane facilities. 相似文献
817.
Predicting the economic and demographic impacts of resource development on regional areas is difficult to assess because of limited availability of analysis, difficulties of predicting where workforce are likely to be based, and different impacts on communities because of variations in size and economic structures. In this study modelling has been employed to identify future employment and demographic impacts of future resource developments on communities in the Surat Basin in southern Queensland, Australia. The analysis summarises potential employment increases over multiple projects and uses multipliers from Input–Output models to assess likely impacts by local government area when future workforce might commute to or live locally in the region. The results demonstrate that recent moves to commuting workforces limit the economic impacts on local and regional communities in complex ways. 相似文献
818.
Yujia Huang Ting Zhang Jianing Lou Peng Wang Lei Huang 《Frontiers of Environmental Science & Engineering》2022,16(5):66
819.
Mengtian Li Ge Song Ruiping Liu Xia Huang Huijuan Liu 《Frontiers of Environmental Science & Engineering》2022,16(6):70
820.
以福建省某化工危险废物处理工程为例,研究固态危废焚烧处置设施的技术性能。工程采用高温涡流燃烧+二燃室+水冷除尘器+急冷塔+干式吸附+布袋除尘+喷淋吸附+雾水分离工艺,设计处理量为100 kg/h。研究结果表明:在测试工况下,二燃室温度为(1 149.6±13.4)℃;烟气在炉膛的平均停留时间为(5.35±0.12)s,燃烧效率为99.97%;萘与CCl4的焚毁去除率分别为99.996%与99.991%,热灼减率为3.3%;焚烧设施的技术性能达到《危险废物焚烧污染控制标准》(GB 18484—2020)的要求;二噁英的排放值为0.007 6 ngTEQ/m3,HF和CO的排放值分别为1.21 mg/m3和72.8 mg/m3,烟气排放达标。 相似文献