Glazed hollow bead/polyurethane foam(GHB-PUF)composite of high filler amount was prepared by in-situ incorporating flame retardants and high content of glazed hollow bead with polyurethane matrix. The influences of glazed hollow bead dosage amount on the flame resistance performance,thermal conductivity performance,compressive performance and thermal stability of the composites were characterized by oxygen index,thermal conductivity,compressive strength and thermogravimetric analysis. The result shows that filling with high content of glazed hollow bead and appropriate amount of flame retardants dramatically improves fire resistance and compressive performance of this composite. Extreme oxygen index can be over 30% and it increases as the dosage of glazed hollow bead goes up;compressive strength reaches 0.17 MPa. Although the thermal conductivity enlarges to 0.045W(/m·K),namely the thermal conductive performance slightly decreases,this composite is still a type of material with good insulation which serves as wall insulation materials. In addition,it behaves better on thermal stability;onset temperature rises to 263 ℃and the residue at 800 ℃ is 61.56%.

通过对圆明园遗址公园植物种类、数量及景观现状的调研,结合有关资料文献,对圆明园开放区和未开放区植物景观现状进行分析.在此基础上提出圆明园遗址公园植物景观整治的总体原则和具体建议,时山体、水体及建筑院落采取不同的调整策略,以期达到保护和整治相结合,既不破坏遗址,又满足游客基本功能需要的目的.

【Objective】 Analysis on Formaldehyde Emission from environmental composite consist of wood-particle and waste tire rubber,which are cured by polymeric methylene diphenyl diisocyanate adhesives(PMDI)and Urea-formaldehyde(UF) resins.【Method】 The law of formaldehyde emission as affected variables of composite was analyzed and optimized with Response Surface Method(RSM)on the platform of Design-Expert software.Interaction mechanism of 3 variables was probed.【Result】 The results exhibit that parameters of wood/rubber and UF are remarkably significant to formaldehyde emission of composite;there were some significance on PMDI to formaldehyde emission.Simulated equation was built through the RSM.Optimal parameters of composite:amout of PMDI is 5.966%,UF 10.004%,Wood /Rubber-value is 60/40,and formaldehyde emission-value(FE) 71.15 mg/kg.【Conclusion】 So wood and waste tire rubber environmental composite can be excellently conducted by PMDI-UF resins.

通过对普福岭景区水生植物景观的调查,从结合水面造景、跌水景观营造、与建筑物搭配、自然式驳岸处理等方面简要分析水生植物景观营造方式;将景观现状与竣工图作比较,分析景观营造中存在的问题,探讨解决问题、维持景观持续性的方法。

本文在探讨彩叶地被植物内涵与成因的基础上,总结了彩叶地被的分类和应用原则。结合杭州城市园林绿地的实际调查,分析了彩叶地被在林下、林缘、滨水、护坡、道路、庭院等不同场合的应用实例,提出了彩化是园林地被植物材料选择的发展趋势之一,但应用宜合理慎重。

The influence of implementing limitation of deforestation on the management of wood production was introduced in the paper. Implementing limitation of deforestation is an important measure that can control the consumption of forest resources, and ensure forest resources sustainable growth, which will be also favor to adjust the layout of wood production, and establish scientific and effective management of wood production.

This paper was intended to solve the main eco-environmental problems of the alpine meadow in the upstream area of the Xiliao River.Based on natural and economic conditions of the area,the distribution and construction techniques of an integrated protection forest system were studied systematically,and its protection effects were investigated preliminarily.The integrated protection forest system covers 46 800 hm~2.The main part of the system is the shelter forest for farmlands,which is combined with trees,shrubs and herbs,as well as forest belts,forest nets and forest patches.Water resources conservation forest,soil and water conservation(forest and eco-economic) channels are the important compensations.The percentage of forest coverage increases from 11.8% to 23.3%.At present,effects of the shelter forest for farmlands are not so significant,but grass yield,grass species composition,physical property and nutrient status change greatly in the deteriorated grasslands.The integrated protection forest system may greatly accelerate sustainable development of the regional environment,economy and society,and maintain ecological security of the midstream and downstream areas of the Xiliao River and the capital of China.

Abstratc The article presents the course of research on finding the recipe about fast adhering to wood through analysis of double-factor variance and orthogonal method.The adhesive is consisted of two kinds of liquid(named as first liquid and second liquid).The different faces of two blocks of wood are respectively smeared with the same quantity of first liquid as second liquid.And then,the two blocks of wood are pressed together at normal temperature.5 minutes later,the adhering intensity of the two blocks reaches above 70% of the max one,and 72 hours later,reaches the one of the Ⅱ plywood.