本文通过系统梳理定性的植被-生境分类法(Vegetation habitat classification system,VHCS)和定量的草地综合顺序分类法(Comprehensive and sequential classification system of grassland,CSCS)在青海省草地资源调查过程中的发展史,...本文通过系统梳理定性的植被-生境分类法(Vegetation habitat classification system,VHCS)和定量的草地综合顺序分类法(Comprehensive and sequential classification system of grassland,CSCS)在青海省草地资源调查过程中的发展史,阐述了二者在不同历史时期的表现形式。通过对分类系统指标的对比发现,VHCS和CSCS在应用于草地分类时既有相通之处,又有所差异。结果表明:通过对比VHCS与CSCS的温度、湿润度及划分出的草地类型优势植物种类和分布区域发现,VHCS在热量级的划分上精确度较小,VHCS和CSCS湿润度划分指标的标准和范围基本一致,但对应的景观类型存在明显差异;二者的优势植物对应基本一致;CSCS的分布区域侧重以行政区域为单位,而VHCS则将分布区域按照地形来划分。文章基于以上结果,分析了目前青海省草地分类时面临的问题,并提出针对性的解决措施,为指导青海省草地分类和管理提供基础理论依据。展开更多
In this paper a novel 7-lump kinetic model is proposed to describe residual oil catalytic cracking, in which coke is lumped separately for accurate prediction. The reactor block is modeled as a combination of an ideal...In this paper a novel 7-lump kinetic model is proposed to describe residual oil catalytic cracking, in which coke is lumped separately for accurate prediction. The reactor block is modeled as a combination of an ideal pipe flow reactor (PFR) and a continuously stirred tank reactor (CSTR). Unit factors are designed to correct the deviation between model predictions and practical plant data and tuned by modified Levenberg-Marquardt algorithm. The parameters estimated are reliable and good agreement between the model predictions and plant observations is observed. The model helps us get good insight into the per- formance of an industrial riser reactor that would be useful for optimization of residual oil catalytic cracking.展开更多
基金Supported by the National Creative Research Groups Science Foundation of P.R. China （NCRGSFC： 60421002） and National High Technology Research and Development Program of China （863 Program） （2006AA04 Z182）
文摘本文通过系统梳理定性的植被-生境分类法(Vegetation habitat classification system,VHCS)和定量的草地综合顺序分类法(Comprehensive and sequential classification system of grassland,CSCS)在青海省草地资源调查过程中的发展史,阐述了二者在不同历史时期的表现形式。通过对分类系统指标的对比发现,VHCS和CSCS在应用于草地分类时既有相通之处,又有所差异。结果表明:通过对比VHCS与CSCS的温度、湿润度及划分出的草地类型优势植物种类和分布区域发现,VHCS在热量级的划分上精确度较小,VHCS和CSCS湿润度划分指标的标准和范围基本一致,但对应的景观类型存在明显差异;二者的优势植物对应基本一致;CSCS的分布区域侧重以行政区域为单位,而VHCS则将分布区域按照地形来划分。文章基于以上结果,分析了目前青海省草地分类时面临的问题,并提出针对性的解决措施,为指导青海省草地分类和管理提供基础理论依据。
基金Supported by National Natural Science Foundation of China （60721062） and National High Technology Research and Development Program of China （863 Program） （2006AA04Z182）
基金Supported by National Young Science Foundation of P.R.China(60604003)National Natural Science Key Foundation of P.R.China(60434020)National Key Technologies Research and Development Program in the 10th Five-year Plan(2001BA204B01)
文摘这份报纸处理与州的时间延期，参数无常和未知统计特征，但是与有限力量骚乱为 Lurie 单个系统的一个班过滤的柔韧的 H 的问题，试图设计一个要用体力地稳定的过滤器以便单个系统是的不明确的 Lurie 时间延期不仅常规，免费、稳定的推动，而且为所有可被考虑的无常为过滤错误动力学有 H 性能的规定水平。为如此的一个过滤器的存在的一个足够的条件以线性矩阵不平等(LMI ) 被建议。当 LMI 的这个集合的一个答案存在时，一个需要的过滤器的参量的矩阵能容易用 LMI 工具箱被获得。
基金Supported by National High Technology Research and Development Program （863 Program） （2007AA04Z179）, National Natural Science Foundation of China （60774044）, and Professional Research Foundation forhdvaneed Talents of Jiangsu University （07JDG037）
基金Project supported by the National Creative Research Groups Sci-ence Foundation of China (No. 60421002) and the "New Century 151 Talent" Project of Zhejiang Province, China
文摘In this paper a novel 7-lump kinetic model is proposed to describe residual oil catalytic cracking, in which coke is lumped separately for accurate prediction. The reactor block is modeled as a combination of an ideal pipe flow reactor (PFR) and a continuously stirred tank reactor (CSTR). Unit factors are designed to correct the deviation between model predictions and practical plant data and tuned by modified Levenberg-Marquardt algorithm. The parameters estimated are reliable and good agreement between the model predictions and plant observations is observed. The model helps us get good insight into the per- formance of an industrial riser reactor that would be useful for optimization of residual oil catalytic cracking.
基金Supported by the National Creative Research Group Science Foundation of China （600421002） and the New Century 151 Talent Projects of Zhejiang Province
文摘为不明确的线性分离系统的一个班的 peak-to-peak 获得最小化的一条矩阵不平等途径被学习。我们最小化 * 是导致的 L 标准上的最好的上面的界限的 -norm, 由与逃避不了的椭圆体围住可达到的集合获得了，而不是直接最小化导致的 L 标准。基于这个想法，柔韧的 peak-to-peak 获得最小化的问题和控制器合成被归结为解决一套矩阵不平等的可行性问题。一个数字例子被用来表明介绍方法的可行性和有效性。
