Results 61 to 68 of about 210 (68)
Conception and practice of resource utilization, energization and functionalization of coal mining subsidence areas with high groundwater level [PDF]
Underground coal mining often leads to surface subsidence and water accumulation, changes in the ecological environment, as well as in the spatial pattern of land and water resources, in high groundwater level mining areas.
Liang YUAN, Liangji XU
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Research on sediment reduction benefits of engineering measures on waste rock slope under different rainfall intensities [PDF]
The dump slope of open-pit coal mines is characterized by steep gradients, loose structure, and poor stability, leading to severe soil erosion under heavy rainfall.
Gang LYU +3 more
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Shuitu Baochi Xuebao目的探讨煤炭开采对植被群落与土壤养分的影响，以期为高寒矿区生态修复提供理论依据。方法以青海海西木里煤田典型矿井区为研究对象，通过植被群落调查及土壤养分测定对比2 a与9 a人工植被修复区的修复效果。结果采矿导致景观破碎化，形成矿坑与煤矸石渣山，其植被盖度和生物量极低，矿坑及渣山土壤含水率、全碳、全氮等指标显著低于原生草地，其中渣山降幅尤为剧烈（分别达90.9%、68.9%、88.2%），且有效磷极度匮乏。人工修复（以种植草地早熟禾和垂穗披碱草为主，并辅以羊板粪和有机肥混合改善土壤肥力）2 a后 ...
马振升 +6 more
doaj
Research progress on the distribution and occurrence characteristics of rare earth elements in coal and coal-fired products [PDF]
Rare earth elements are widely used in permanent magnet, metallurgy, hydrogen storage materials and other fields due to their special properties, and their consumption is increasing year by year.
Hua DING +3 more
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The Basic Way to Develop Circular Economy in Building Material Industry of China [PDF]
, 2006 发展循环经济是我国社会经济实现可持续发展的必然选择，而建筑材料工业由于其自身固有的特点等原因，在一定的经济区域乃至全国推进循环经济发展的进程中,具有十分特殊的重要地位和作用。一方面，具有明显的资源密集型特征的建材产业要实现健康持续的稳定发展，必须走循环经济发展道路；另一方面，通过社会各行业、各领域共同推进循环经济的发展过程，才有可能在更高级的程度上实现建材工业同国民经济其他产业和谐、协调的发展。 建筑材料工业是个庞大的系统，其中又可根据工艺技术及应用领域的不同分为若干子行业。从发展循环经济的特定视角分析，
许金华
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The Load Coordinate Control System of CFBB [PDF]
, 2007 循环流化床锅炉(CirculatingFluidizedBedBoiler，简称CFBB或CFB锅炉)作为高效、低污染、燃料适应性广、负荷调节性能好的洁净燃煤技术，在全世界受到广泛重视，正在成为燃煤技术的主力军。循环流化床锅炉商业化的迅速发展给它的运行自动化提出了很高的要求。因此在我国大力开发研制循环流化床锅炉的自动控制技术是一项迫在眉睫的战略性任务，尤其是开发适合中国国情的循环流化床热工控制系统。 由于现有的控制系统都是建立在近似线性化模型或是辨识模型的基础上，根据过程的输入输出数据直接建模 ...
曾祥平
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Energy conservation in the People's Republic of China: Fiscal measures [PDF]
The Government of the People’s Republic of China (PRC) has demonstrated a strong commitment to conserve energy, resources, ecology and the environment; and enhance institutional capacities for sustainable development. It has also emphasized the intent to
Anil Terway
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