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森林合理年采伐量——“分期计算,综合平衡”计算 被引量:9
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作者 周新年 吴沂隆 +2 位作者 曾国容 余松泽 吴强 《林业科学》 EI CAS CSCD 北大核心 2002年第3期78-86,共9页
“分期计算 ,综合平衡”法确定森林合理年采伐量 ,能解决森林龄级结构分布不均时常用方法存在的不足 ,全面调整轮伐期内各时期的年采伐量 ,为修订近期森林年采伐量和编制中长期林业发展规划提供科学决策依据。
关键词 图表法 森林合理年采伐量 分期计算 综合平衡
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采伐限额下用材林整体资产评估
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作者 董敏 陈平留 张国防 《林业资源管理》 北大核心 2018年第6期23-29,共7页
在鼓励规模化经营和集体林业经营主体单独编制森林采伐限额的背景下,大规模的用材林整体资产转让成为集体林权转让的主要类型。以森林采伐限额控制下用材林整体资产的产出和投入特征为基础,提出了采伐限额下用材林整体资产评估的方法,... 在鼓励规模化经营和集体林业经营主体单独编制森林采伐限额的背景下,大规模的用材林整体资产转让成为集体林权转让的主要类型。以森林采伐限额控制下用材林整体资产的产出和投入特征为基础,提出了采伐限额下用材林整体资产评估的方法,并结合最新的森林采伐限额政策进行了实证分析。研究结果可应用于当今集体用材林整体资产转让中的价值评估,使资产评估值更为合理和符合实际。 展开更多
关键词 森林采伐限额 用材林整体资产 合理年伐量 分期计算、综合平衡法 人工一般用材林
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A novel resource co-allocation model with constraints to budget and deadline in computational grid 被引量:1
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作者 胡志刚 肖鹏 《Journal of Central South University》 SCIE EI CAS 2009年第3期458-466,共9页
To address the issue of resource co-allocation with constraints to budget and deadline in grid environments, a novel co-allocation model based on virtual resource agent was proposed. The model optimized resources depl... To address the issue of resource co-allocation with constraints to budget and deadline in grid environments, a novel co-allocation model based on virtual resource agent was proposed. The model optimized resources deployment and price scheme through a three-side co-allocation mechanism, and applied queuing system to model the work of grid resources for providing quantitative deadline guarantees for grid applications. The validity and solutions of the model were presented theoretically. Extensive simulations were conducted to examine the effectiveness and the performance of the model by comparing with other co-allocation policies in terms of deadline violation rate, resource benefit and resource utilization. Experimental results show that compared with the three typical co-allocation policies, the proposed model can reduce the deadline violation rate to about 3.5% for the grid applications with constraints to budget and deadline. Also, the system benefits can be increased by about 30% compared with the those widely-used co-allocation policies. 展开更多
关键词 CO-ALLOCATION computational grid grid economy queuing theory DEADLINE
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