药山自然保护区与周边社区和谐发展研究

于1984年批准建立的省级药山自然保护区总面积20225hm^2,属森林生态类型的自然保护区。为探索保护区与周边社区和谐发展的模式,从2003年8月～2004年10月进行了各种调查。介绍了自然保护区建立以来取得的主要成绩、存在的问题,提出了对策建议。     

微米木纤维模压制品握螺钉力理论的试验验证

介绍了微米木纤维模压制品握螺钉力计算理论,利用螺纹牙受力分布公式计算了螺纹牙受力分布百分比并计算出握螺钉力的理论值;通过握螺钉力试验测得握螺钉力实际值,将其与理论计算值进行对比,验证了微米木纤维模压制品握螺钉力理论的正确性.     

发展林业——构建和谐社会

林业是生态环境的主体,发展林业可以促进生态环境改善,为人类社会发展提供生态环境保障,所以发展林业是促进人与自然和谐的关键,是构建和谐社会的重要组成部分。为此,加快林业建设必须处理好五种关系,发展林业重点工程,同时在加快发展林业进程中要进一步深化改革,为全面构建"民主法治、公平正义、诚信友爱、充满活力、安定有序、人与自然和谐相处"的社会做出新贡献。     

城市山水经营——以兰亭、玲珑山为例论浙江山水风景资源的经营

1990年以来,钱学森山水城市理论不断被关注和研究.以城市经营理念和风景资源属性变迁为立论基础,分析认为,山水风景资源应该是城市经营的主要内容之一,山水风景资源本身具有可以经营的多元价值.在结合绍兴兰亭,临安玲珑山案例分析后指出,在当前的城市化进程中,浙江的城镇化建设需要以城市经营的理念经营城市中的山水风景资源.浙江山水风景资源作为未来可进入市场竞争的城市经营对象,必须在价值导向上首先建立山水文化价值维度,在经营思路上要有整体性的保护和开发,在具体实践中要注重多元价值的综合关注.     

浅析完善中国森林生态效益补偿制度

随着地球人口的增加和人类活动的加剧,保护森林资源已经提上了各国的议事日程。而对于我国这样的一个贫林国家,森林资源的保护问题与森林生态效益的补偿就显得愈加迫切与重要。文章针对我国现有的森林生态效益补偿制度的沿革、存在的问题进行了分析,并提出我国森林生态效益补偿制度需进一步完善或创新。     

森林火险中长期预测预报研究进展

概述了我国和美国、加拿大的森林火险中长期预测预报的理论和方法。国内研究大多建立在对历史火灾资料与气象资料进行统计分析研究的基础上, 预测结果多是定性的、间断性的。美国和加拿大则依托成熟的全国性森林火险等级系统, 结合气象局的中长期降水和温度预报, 给出各火险指数实时的一周尺度预报及每周1次的16周尺度的季节性预报。我国今后应加强森林火险的中长期预测预报研究, 要由单纯定性分析转向定量化研究, 由一般数理统计模型转向具有明显物理意义的数学物理模型。     

Water adsorption process of bamboo heated at low temperature

Water adsorption capacities were evaluated for moso bamboo samples that were heated at 200°C for various times and conditioned in a closed container at 97% relative humidity at 20°C. Logistic regression analysis was used for curve fitting to the adsorption data and its parameters were analyzed. These parameters were compared with those derived previously from the Dubinin and Radushkevich theory. The properties of the heat-treated samples changed after 5 h of heating. With less than 5 h of heating, hydroxyl groups provided the main adsorption sites but their numbers decreased on heating. After 5 h, gasifi cation of the bamboo increased and capillaries formed. Part of this article was presented at the 57th Annual Meeting of the Japan Wood Research Society, Hiroshima, August 2007     

Integrating landscape connectivity in broad-scale forest planning through a new graph-based habitat availability methodology: application to capercaillie (Tetrao urogallus) in Catalonia (NE Spain)

The loss of connectivity of forest landscapes is seriously hindering dispersal of many forest-dwelling species, which may be critical for their viability and conservation. In this context, explicitly incorporating connectivity considerations is an important challenge in current forest planning and management, but as yet there is a lack of operative methods for appropriate decision making in this respect. We describe a new methodology based on graph structures and a habitat availability index (integral index of connectivity) that integrates forest attributes (like habitat quality) and network connectivity in a single measure. We apply this methodology to examine the connectivity of the highly fragmented habitat of capercaillie (Tetrao urogallus) in Catalonia (NE Spain), where the threatened status of this forest bird species calls for landscape-level forest planning solutions. We analyse data on the distribution of capercaillie forest habitat at 1 km spatial resolution obtained from the recent Catalan Breeding Bird Atlas. We determine the functionally connected regions existing within its habitat distribution and identify the forest habitat areas that are more important for the maintenance of overall landscape connectivity for this species. Based on these results, we provide recommendations on certain critical public forests where management oriented to the conservation of capercaillie habitat is more necessary. These results highlight the potential and practical interest of the proposed methodology for successfully integrating landscape connectivity in broad scale forest planning.     

明清竹家具结构形式的外延与内涵——基于罗兰·巴尔特符号学理论的考察

明清竹家具是中国传统竹家具发展的高峰期,在当前“以竹代塑”背景下,其优秀的造型艺术,尤其是有别于硬木榫卯结构的结构形式为竹家具的创新设计提供了一定的文化源泉。文章依据组成家具的结构部件是否必要的原则,梳理归纳出明清竹家具结构形式可以分为主体结构形式和辅助结构形式2类。同时,从罗兰·巴尔特符号学“外延/内涵”二元理论出发,论述了明清竹家具主体结构形式符号以外延意义为主、辅助结构形式符号以内涵意义为主,进而总结出主体结构形式符号的外延意义是实用功能性的、辅助结构形式符号的内涵意义是审美装饰性的。对于明清竹家具结构形式符号学视角的考察,一方面丰富了明清竹家具研究的理论系统,另一方面可以为当前竹家具的创新设计提供造型意义传达的实践指导。     

林农与市场对接的两种博弈模型

文中把在农村林业经济中具有规模经营效应的组织形式划分为以龙头企业为主导模式和以合作组织为主导模式,分析了以龙头企业为主导模式的优势;通过建立企业与林农的博弈模型,指出以龙头企业为主导模式的缺陷,而以合作组织为主导模式不仅具有以龙头企业为主导模式的优势,还能够避免其缺陷。