异龄林

威布尔（Weibull）分布在同龄纯林的直径分布中已得到广泛的应用，但是在复层混交异龄林中应用的研究报道甚少。

The Weibull Distribution has been widely applied in diameter distribution of pure forest , but very few studies have been reported in mui layer forest with different ages .

关于异龄林大小等级划分标准的探讨

Discussion on Classification Criterion of Size Class for Uneven-Aged Forest Stands

混交异龄林的一个动态模型

A model for mixed species uneven & aged forest stands

天然异龄林具有十分重要的生态、经济和社会价值。

Natural uneven-aged forest has very important ecological , economical and social value .

异龄林动态系统与最优控制

Uneven - Aged Forest Dynamic System and Optimal Control

异龄林收获调整的动态优化研究

Dynamic Optimization of Yield Regulation of Abies Uneven-aged Stand

闽北异龄林生长矩阵模型研究

A Study of the Growth Matrix Model of Uneven-aged Forest in Northern Fujian Province

异龄林的生长动态研究

Study on the growth dynamics of uneven-aged stands

长白山林区复层异龄林垂直结构的研究

Study on Vertical Structure of Compound Storied Uneven-aged Forest in Changbai Mountain Forest Region

应用矩阵模型及线性规划进行异龄林收获调整的初步研究

Application of matrix model and linear programming to the yield regulation of uneven-aged stands

针阔混交异龄林生长规律的研究

A Study on Growth Law of Mixed Forest of Uneven-aged Conifer and Broad-leaved Trees

异龄林生长的动态分析&兼小兴安岭和牡丹江林区冷杉异龄林的生长分析

Dynamic analysis of uneven-aged forest stand growth

异龄林既是一个自然生态系统，又是一个复杂的森林经营系统。

Uneven-aged forest is not only a natural ecosystem , but a complicated forest management system .

混交异龄林动态模型的仿真解及经营决策

The simulation result of the model for mixed species unevenaged forest stands and the managerial decision

指出不对称竞争可能是异龄林维持高稳定性的原因之一。

Dissymmetric competition of trees is probably one of the reasons that uneven-aged forest has high stability .

闽北异龄林地位质量评价方法的研究

A Study on the Evaluating Method of the Site Quality of Uneven aged Broadleaved Forest in Northern Fujian Province

具体应用到长白山林区云冷杉为主的混交异龄林的径阶动态模拟，短期和长期模拟效果都较好。

Simulating effects of short-term and long-term are acceptable for spruce and fir dominated mixed uneven-aged stands in Changbaishan forest region .

本文利用兴安落叶松树干解析资料探讨天然异龄林地位质量评估方法。

A method for estimating site quality of uneven-aged natural Larix gmelini stands is studied on the basis of stem analysis data .

异龄林经营决策是一个涉及到森林的经济效益和永续利用等多个目标的决策问题。

In this paper , the problem of uneven-aged forest management decision making is considered as a problem of multi-objective decision making .

经研究证明，威布尔分布不但适用于同龄纯林直径分布，而且亦适用于复层异龄林直径分布。

The result showed that the Welbull Distribution was not only suited to diameter distribution of the even-aged pure forest , but also to the multi .

随着模拟年代的推衍，树种年龄结构发生显著变化，呈现出复杂多样的异龄林空间分布格局。

The component structure of forest age changes significantly with various spatial pattern of different ages of forest come into being as the year going on .

以异龄林为对象，应用模拟退火法，探讨了确定林分水平上异龄林最佳可持续经营决策的方法，以期为我国森林可持续经营的生产实践提供参考。

To guide forest sustainable management this paper discusses the method of unevenage forest sustainable management optimization on the stand level using the simulated annealing algorithm .

因此，进行年龄结构调整优化时，应逐步减少同龄林面积的比重，逐步扩大异龄林面积的比重。

When optimization age structure of forest , there should be a gradual reduction in the proportion of the same age forest , and gradually expand the uneven-aged forest .

在森林资源调查中，对异龄林用平均年龄和龄组进行归类，会缩小不同林分之间的结构差异，并造成林分年龄的偏低估计。

Classification for uneven-aged forest stands by mean age and age group in forest inventory may reduce the difference of structure of various stands and underestimate the age of stands .

本文介绍了应用多变量分析法确定异龄林树木自然群的方法，提出了风景区森林经营管理的措施。

This paper recommends a way to identify natural groups of trees in uneven-aged forests using multivariate methods and puts forward a proposal on the forest management and administration in scenic spot .

以扩展后的矩阵模型为基础建立了考虑树种组成的最优经营模型，并以吉林省东部长白山林区针阔混交异龄林为对象，对模型进行了求解。

Based on the generalized model , an optimal management model of species composition was structured with plot data from mixed stands of coniferous-deciduous species in the Changbai Mountains forest region , eastern Jilin province , China .

本文在异龄林生长矩阵模型基础上，研究了异龄林动态优化问题，建立了相应的计算机仿真模型。

Based on the matrix model of the growth of uneven-aged forest stand , the problem of the dynamic optimization of uneven-aged forest harvesting regulations is studied and a computer model associated is established for its simulation in this paper .

用威布尔分布模拟山杨异龄混交林的直径分布

Weibull distribution simulates diameter distribution for uneven - aged and mixed Populus davidiana

空间结构信息对异龄混交林经营特别重要。

There is an ever increasing need for information relation to the spatial structure of uneven aged mixed forests .

用威布尔分布拟合天然、异龄混交林的直径分布，经检验是可行的。

In fitting diameter distribution of natural , uneven-aged and mixed populus davidiana sta - nd , Weibull distribution was .