Assuming that the operators L1,L2 are self-adjoint and e-tLi(i=1,2)satisfy the generalized Davies-Gaffney estimates,we shall prove that the weighted Hardy space H1L1,L2,w(Rn1×Rn2)associated to operatorsL1,L2 on p...Assuming that the operators L1,L2 are self-adjoint and e-tLi(i=1,2)satisfy the generalized Davies-Gaffney estimates,we shall prove that the weighted Hardy space H1L1,L2,w(Rn1×Rn2)associated to operatorsL1,L2 on product domain,which is defined in terms of area function,has an atomic decomposition for some weight w.展开更多
Rapid urbanization and the booming of diversified community development requirements have challenged the development of community planning in China from theory to practice. Community planning, especially with localize...Rapid urbanization and the booming of diversified community development requirements have challenged the development of community planning in China from theory to practice. Community planning, especially with localized and practice-oriented characteristics, is now facing many limitations. These include aspects such as traditional urban planning techniques that mainly focus on space, a restricted research perspective, as well as basic planning theories that are mostly imported from the West. Using the perspective of socio-spatial dialectic for reference, this paper summarizes the evolution process of Chinese modern residential space planning and design from residential district planning under the planned economy system, to housing estate planning in the real estate development, and to community planning in the new era, presenting an important characteristic of transitioning from "producing space" to "production of space," with "society" gradually replacing "space" and returning to the goal of production. Based on the analysis on the main limitations and problems in the former work of community planning in China, the paper takes the practical exploration on community planning in the "New Qinghe Experiment" in Haidian District, Beijing for an example. Aimed at the prominent problem of an extreme imbalance between "urbanization of space" and "urbanization of population" in the current Qinghe area, the key objective, means, and technical path of new-type community planning are proposed, within which three significant transition features are demonstrated, including going from "need-oriented" to "capital-oriented," from "interest intervention" to "relationship intervention," and from "community construction" to "community building."展开更多
基金Qingquan Deng was supported by the National Natural Science Foundation of China(Grant No.11971191)the Fundamental Research Funds for the Central Universities(CCNU18QN030 and CCNU-18CXTD04)partially supported by the National Natural Science Foundation of China(Grant Nos.11661061,11671163).
文摘Assuming that the operators L1,L2 are self-adjoint and e-tLi(i=1,2)satisfy the generalized Davies-Gaffney estimates,we shall prove that the weighted Hardy space H1L1,L2,w(Rn1×Rn2)associated to operatorsL1,L2 on product domain,which is defined in terms of area function,has an atomic decomposition for some weight w.
文摘Rapid urbanization and the booming of diversified community development requirements have challenged the development of community planning in China from theory to practice. Community planning, especially with localized and practice-oriented characteristics, is now facing many limitations. These include aspects such as traditional urban planning techniques that mainly focus on space, a restricted research perspective, as well as basic planning theories that are mostly imported from the West. Using the perspective of socio-spatial dialectic for reference, this paper summarizes the evolution process of Chinese modern residential space planning and design from residential district planning under the planned economy system, to housing estate planning in the real estate development, and to community planning in the new era, presenting an important characteristic of transitioning from "producing space" to "production of space," with "society" gradually replacing "space" and returning to the goal of production. Based on the analysis on the main limitations and problems in the former work of community planning in China, the paper takes the practical exploration on community planning in the "New Qinghe Experiment" in Haidian District, Beijing for an example. Aimed at the prominent problem of an extreme imbalance between "urbanization of space" and "urbanization of population" in the current Qinghe area, the key objective, means, and technical path of new-type community planning are proposed, within which three significant transition features are demonstrated, including going from "need-oriented" to "capital-oriented," from "interest intervention" to "relationship intervention," and from "community construction" to "community building."
