关于不分明凸集的几点注记

THE ECONOMIC SIZE OF MECHANIZED AGRICULTURE IN "THE REGION OF TAI—LAKE"——A Simulation Model to Determine the Optimum Service Area of Machinery Sets

中文摘要:

      我们综合考虑作物组合和熟制、生产工艺、机群的生产效率和费用、作业适期、气候条件的随机性及其对实际田间作业天数的影响、以及相应的适时性损失,应用蒙特卡罗模拟技术,建立了一个确定各种机群结构最佳负担面积的模拟模型。并根据目前苏南地区适用的稻麦生产工艺和目前可供选用或已经过引进试验的机组性能参数,按照配套、协调和不可分割的原则,组成了七种基本机群结构。在模拟运算和灵敏度试验的基础上,对各种机群的经济规模、单位面积投资、生产费用、土地生产率和亩均纯收入等各项经济效益指标进行了详尽的分析和比较。最后,就农业机械化的发展战略、有关的政策措施以及农业的经营体制提出了我们的见解和结论。

英文摘要:

      Using the Motecarlo Simulation Technique, a simulation model, considering integrately the crop-mix, production technology, the operation efficiency and cost of machinery sets, suitable field days, the randomness of climate condition and its affection on available days for field operating, and relevant timeliness losses, was constructed to determine the optimum service area of varient machinery sets. Seven machinery sets for "The Region of Tai-Lake" were formed according to the principles of completeness, mutual suitability and indivisibility. On the basis of simulate-calculating and responsetesting,the economic size, and the average investment, production cost, land productivity and net income on unit area for each machinery set were fully analyzed and compared. Finally, our opinions on the problems such as the development strategy of agricultural mechanization, policies and measures, and the management system of agriculture were given.