林下经济雷竹产业发展研究分析--以弋阳县为例

根据弋阳县雷竹发展现状,结合当前林下经济发展形势,提出该县近几年林下经济雷竹产业发展目标及研究分析。     

浙江省山矾科植物园林应用综合评析

本文通过对浙江省山矾科植物进行园林应用综合评析,以期为园林绿化建设提供适应性强、观赏价值高、生态功能强的优良园林树种,并筛选出了5种优良树种可供后期开发利用,并为山矾植物树种的引种、选育及产业化研究的开展提供相应的理论价值。     

Observance–Influence Analysis: A Case Study in a Forest Recreation Area

Importance–performance (I-P) analysis is a common evaluative measure in forest recreation management. However, concerns with I-P analysis have been raised. In this study, the observance–influence (O-I) analysis technique modified from I-P analysis was adapted for analysing the observance of various use and resource impacts by on-site visitors, and the influence that these impact conditions have on forest recreation area visitor experiences. During the summer and autumn of 2000, 476 Worak-san Forest National Park visitors in Korea were surveyed. The O-I grid generated from the survey data indicated that managers are doing a good job. The grid revealed most impacts clustering in the low priority concern and no concern quadrants. Impacts shown to be of most concern related to utility poles and power lines, poor maintenance of buildings, dead and dying trees, and discourteous behaviour. The O-I grid analysis model has considerable utility for park managers in analysing visitors’ perceptions of park impacts.     

强夯后沉降量计算值的分析

以江铜瓮福化工有限公司40万吨/年硫酸厂房工程为例,在强夯法处理地基沉降时,对强夯后计算的最终沉降量与实际平均沉降存在的差异提出问题。通过反算,分析造成这一结果的原因,为今后在强夯法处理地基的计算提供参考。     

伊春市福轩木业公司细木工板生产线改扩建项目经济效益可行性分析

结合伊春市福轩木业公司细木工板生产线改扩建项目实际,对细木工板项目的投资及经济效益进行了详细分析,论证了该项目的经济可行性。     

毛竹若干性状相关性和主成分分析

通过对毛竹若干性状相关性的研究,为毛竹的系统选育和栽培提供理论依据.结果表明:毛竹性状存在较大变异,RSD最大的性状是10 m处直径,RSD最小的性状是地径壁厚;毛竹各性状间的相关系数一般呈极显著或显著水平,各性状之间存在普遍的相关性;毛竹29个性状根据变量之间差异的大小可分为4类;主成分分析中前两个主成分对变异的贡献率达到85％以上.     

面向大规模定制的家具模块编码与配置技术

针对面向大规模定制的家具模块编码与配置技术进行了探讨与分析,并以芬兰某企业的模块配置器为例,阐述其配置原理与流程,以期为国内家具企业实现从大规模生产向大规模定制的模式转换,提供路径指导与技术支持.     

全细胞催化制备单糖酸及其鉴定

首次利用氧化葡萄糖酸杆菌全细胞催化方法,在液体振荡反应体系中分别制取葡萄糖、木糖、阿拉伯糖、半乳糖和甘露糖这5种植物单糖对应的单糖酸钙溶液。以高效阴离子交换色谱-脉冲安培检测器(HPAEC-PAD)对它们的纯度进行检测,并采用红外光谱(FT-IR)和电喷雾质谱(ESI-MS)进行了物质的结构解析与鉴定。结果显示,制备所得的5种单糖酸钙的离子色谱检测纯度均大于98%;它们的红外光谱在1600 cm-1处均有去质子化COO-基团的特征吸收;在电喷雾质谱中2种戊糖酸和3种己糖酸的特征离子峰[M-H]-分别为165.1和195.1,与理论值相符。     

Calorific values and ash contents of different parts of Masson pine trees in southern China

Calorific value of plants is an important parameter for evalu- ating and indexing material cycles and energy conversion in forest eco- systems. Based on mensuration data of 150 sample sets, we analyzed the calorific value （CV） and ash content （AC） of different parts of Masson pine （Pinus massoniana） trees in southern China using hypothesis testing and regression analysis. CV and AC of different tree parts were almost significantly different （P〈0.05）. In descending order, ash-free calorific value （AFCV） ranked as foliage 〉 branch 〉 stem bark 〉 root 〉 stem wood, and AC ranked as foliage 〉 stem bark 〉 root 〉 branch 〉 stem wood. CV and AC of stem wood from the top, middle and lower sections of trees differed significantly. CV increased from the top to the lower sections of the tnmk while AC decreased. Mean gross calorific value （GCV） and AFCV of aboveground parts were significantly higher than those of belowground parts （roots）. The mean GCV, AFCV and AC of a whole tree of Masson pine were 21.54 kJ/g, 21.74 kJ/g and 0.90%, re- spectively. CV and AC of different tree parts were, to some extent, cor- related with tree diameter, height and origin.     

浅析临翔区退耕还林现状与对策

临沧市临翔区自2002年开始实施退耕还林工程,至今已完成0．98万hm^2。因此森林覆盖率提高了12.7个百分点;促进了农村产业结构调整;农民增收。然而还存在着治理模式单一、相关配套工程不落实、权属不清、后续产业发展迟缓等一系列问题。据此提出了今后的对策。