Green roofs are a passive cooling technique that stop incoming solar radiation from reaching the building structure below. Many studies have been conducted over the past 10 years to consider the potential building energy benefits of green roofs and shown that they can offer benefits in winter heating reduction as well as summer cooling.With review and summarized the description of its functional traits in our country, this paper discuss the necessity to carry out the research on the functional traits of green roofs, and gave some suggestions about how to do this.At last, we propose the estimate method for the cost of green roofs construction project and green roof’s economic value and ecological benefit.

Water resources carrying capacity (WRCC) is an important component of the carrying capacity of regional natural resources. It is a restrictive index indicating whether a region can support the coordinated development of its population, economy, and environment. In order to solve the problem that WRCC varies with the supporting capacity of, load on, and capacity for regulation of the water resources, this study establishes the relationship between WRCC and the level of socio-economic development (carrying level) and then develops a WRCC evaluation model by analyzing the connotations, characteristics and influencing factors of WRCC. The model is applied to calculate the population and economic scales supportable by water resources in Jiangsu Province under different carrying levels. Predictions are made of the effects of varying water consumption quotas and the industrial structure so as to explore methods of regulating and controlling WRCC in the region. The evaluation, prediction, and control results provide an important reference for the rational allocation of water resources in Jiangsu Province so as to further improve the regional WRCC and achieve sustainable development of regional water resources. The regional WRCC evaluation model has strong applicability and good application effects.

The hydrated products, unhydrated cement and water (capillary pores) in the cement paste are seen as matrix, inclusion, Equivalent medium respectively, We used the micromechanics theories and Power’s Volume model to develop a multi-phase micromechanics model capable of simulating the elastic properties of cement-based materials, and the evolution of elastic properties in the hydration process was calculated at different water-cement ratio. The final experimental results show that this model can be used to predict the elastic properties of cement-based materials.