In order to develop the urban community education in Xianyang city,we must follow the guideline of sustainable development,adhere to the principles of opening up,development and reality,and take several measures of guarantee.
The Experiment of the Populace Education at the County of Ding in China before the War of Resistance Against Japan and the Community Education Nowadays
What is more, the 21st century will be an era of knowledge-driven economy. How can we keep the capacity of competition during the transitional period from traditional economy to knowledge economy and learning –based society? From the perspective of constructing a community with great potentiality, establishing learning-based community is a possible answer.
A community is not only the basic carrier of social members’ life and social activities, but also the breakthrough point and the best medium of practicing “life-long education” and ”life-long learning”.
The principles of establishing a community network for disabled children,and relevant policies and legislations to promote such community network have been stipulated in the documents for special education and rehabilitation issued by our Government.
That such a factorization is possible is well-known to algebraists (and expressed by the formulaSL(n;R[z, z-1])=E(n;R[z, z-1])); it is also used in linear systems theory in the electrical engineering community.
Following the methodology of community ecology, the total root mass of a phytocommunity is measured as cubic volume.
The RENIs of three community types (Picea crassifolia + Hippophae rhamnoides ssp.
The standing crop of N in the plant community was 1,025.28 kg/hm2, accumulation in the litter layer was 224.88 kg/hm2, and reserve in the soil was 55,151 kg/hm2.
Compared with other forest types, cycling rate of N in the community was lower than in deciduous broad-leaved forests, rain forests, and mangroves, and was moderate in evergreen broad-leaved forests.
tabulaeformis communities with three tending practices, the highest species abundance index appears with tending and shelterwood cutting and the highest evenness index and species diversity appears with closed tending.
tabulaeformis populations in Huanglongshan Mountain so that the communities will develop continuously.
This result agreed with the phenomenon of desertification reversion, vegetation restoration and dominant communities' formation.
Biomass structure and nitrogen, phosphorus nutrient of Calamagrostis angustifolia populations in different communities of Sanjia
Calamagrostis angustifolia is the dominant species in the typical meadow and marsh meadow communities of Sanjiang Plain.
Compared with other forest types, cycling rate of N in the community was lower than in deciduous broad-leaved forests, rain forests, and mangroves, and was moderate in evergreen broad-leaved forests.
The Shannon-Wiener index, evenness index, and abundance index in gap were higher than those under canopy in the seedling layer, while the community dominance in the seedling layer increased in closed canopy.
The total biomass accumulated with the development of the community.
The total biomass and the biomass of the organs were highest in the mature community and became stable as the community developed.
The biomass ratio of the slow growth group trees tended to increase and the fast-medium group trees tended to decrease as the community developed, which was reveresed in the decline development stage.
The traditional niche-assembly theory asserts that species live together in a community only when they differ from one another in resource uses.
Hubbell argues that the number of species in a community is controlled by species extinction and immigration or speciation of new species.
Structure of a community of testate amoebae in a sphagnum dominated bog in upper sura flow (Middle Volga Territory)
The bulk of the bottom surface is occupied by a community of Zostera marina + Macoma balthica with the mean biomass of the dominating species reaching 0.3-1386.6 and 573.9 g/m2, respectively.
The statistical test that allows us to assign a community consisting of a competitive species to one of three groups differing in the level of species diversity is substantiated.