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经济林种植户有机肥施用行为及影响因素分析——基于陕西省589户种植户调查数据
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作者 张晓慧 郑改兰 童敏之 《西北林学院学报》 CSCD 北大核心 2024年第3期275-280,共6页
在积极倡导环境保护的时代背景下,探讨经济林种植户有机肥施用行为的影响因素,对林业绿色可持续发展具有重要影响。以陕西省589户经济林种植户的调查数据为基础,运用Heckman样本选择模型,着重分析电商参与和社会网络对经济林种植户有机... 在积极倡导环境保护的时代背景下,探讨经济林种植户有机肥施用行为的影响因素,对林业绿色可持续发展具有重要影响。以陕西省589户经济林种植户的调查数据为基础,运用Heckman样本选择模型,着重分析电商参与和社会网络对经济林种植户有机肥施用行为的影响。结果表明,74%的种植户选择施用有机肥,但有机肥投入资金占肥料总投入较低。种植户电商参与、社会网络正向影响其有机肥施用决策和施用程度,并且社会网络在电商参与影响有机肥施用程度的过程中起正向调节作用。此外,家中农用机械数量、经济林种植面积以及是否被评选为科技示范户种植户也会对种植户有机肥施用行为产生影响。 展开更多
关键词 经济林 有机肥 施用决策 施用程度 Heckman样本选择模型
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Application of the Principles of Lean Thinking in the Post Construction Department
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作者 Daniel Cupertino Tatiana G. do Amaral Sammea A. Vilarinho Leonardo Alencar 《Journal of Civil Engineering and Architecture》 2014年第4期477-485,共9页
The increase on the competitiveness, the search on the customer satisfaction, the search by reducing waste in the civil construction were facts which helped entrepreneurs and companies to seek new ways of working, bei... The increase on the competitiveness, the search on the customer satisfaction, the search by reducing waste in the civil construction were facts which helped entrepreneurs and companies to seek new ways of working, being lean construction one of the ways to get that. Studies report that the application of the lean tools in construction was carried out in an isolated way. This type of application was pointed as a major factor limiting the extent of achievement in implementing lean principles. The aim of this studies is to identify opportunities to implement the principles of lean production in the service department of a construction company in Goi^is, proposing routines that try to implement the continuous improvement of its processes, eliminating waste, reducing the lead time, allow it to perform the mapping processes, applying the just-in-time and among others, providing services that add value to the customer satisfaction. It was possible to establish the average time for each step, allowing to identify possible improvements in the department, from the perspective of lean principles. The research paper concludes by pointing out the activities for the Department of Post Construction work from building companies, from lean concepts. 展开更多
关键词 Lean production lean thinking technical assistance post construction.
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Sustainability Issues Related to the Engineering Geology of Long Linear Developments
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作者 PAIGE-GREEN Philip 《Journal of Mountain Science》 SCIE CSCD 2011年第2期321-327,共7页
The development of long linear structures such as roads, rail roads, tunnels, canals and pipelines often has unique engineering geology challenges. These include geological modeling, the identification of material str... The development of long linear structures such as roads, rail roads, tunnels, canals and pipelines often has unique engineering geology challenges. These include geological modeling, the identification of material strength and support factors, stability and risk issues, material excavation characteristics and the proposal of techniques for overcoming geotechnical problems, which are normally assessed as part of the conventional engineering geological investigation. An additional factor that is becoming increasingly important but is seldom included in investigations is the sustainability of the geotechnical inputs, in contrast to the sustainability of the project which is generally included. Sustainability issues revolve around the non-renewable nature of most construction resources and there is no doubt that the injudicious use of these construction materials and construction water is not sustainable in the long term: it is thus essential that the engineering geo-logical investigation should take cognizance of such issues and be adapted to provide the design engineer with the information that will maximize the sustainability options. This will also require a closer on-going relation-ship between the engineering geologist and the design engineer. This paper highlights significant sustainability issues (note that these differ from conventional environmental issues) and suggests some mitigating solutions. The sustainability issues discussed include primarily material and water usage, with some reference to energy conservation (mostly through alternative material usage and processing techniques and transportation). 展开更多
关键词 Engineering geology SUSTAINABILITY Linear structures Construction material WATER
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