The Poincare-Bertrand formula takes an important position in the study of complex singular integral. The Poincare-Bertrand formula on the complex sphere in the multidimensional complex Euclidian spaces was given by Sh...The Poincare-Bertrand formula takes an important position in the study of complex singular integral. The Poincare-Bertrand formula on the complex sphere in the multidimensional complex Euclidian spaces was given by Sheng Gong. Using the method of solid angular coefficient, the authors extend the Poincare-Bertrand formula on the complex sphere to the building domain of the complex biballs, and obtain a more general Poincare- Bertrand formula with the solid angular coefficients.展开更多
By means of the method of solid angle coefficients and the permutation formula on the building domain of complex biballs,direct solutions of some singular integral equations with variable coefficients are discussed an...By means of the method of solid angle coefficients and the permutation formula on the building domain of complex biballs,direct solutions of some singular integral equations with variable coefficients are discussed and the explicit formulas for these solutions are obtained.展开更多
Many single-tower reinforced concrete core wall-steel frame （RCC-SF） buildings have been built in China, but there are no buildings of different-height multi-tower hybrid system. A multi-tower RCC-SF tall building w...Many single-tower reinforced concrete core wall-steel frame （RCC-SF） buildings have been built in China, but there are no buildings of different-height multi-tower hybrid system. A multi-tower RCC-SF tall building was thus studied because of its structural complexity and irregularity. First, a 1/15 scaled model structure was designed and tested on the shake table under minor, moderate, and major earthquake levels. Then, the dynamic responses of the model structure were interpreted to those of the prototype structure according to the similitude theory. Experimental results demonstrate that, despite the complexity of the structure, the lateral deformation bends as the ＂bending type＂ and the RC core walls contribute more than the steel frames to resist seismic loads. The maximum inter-story drift of the complex building under minor earthquakes is slightly beyond the elastic limitation specified in the Chinese code, and meets code requirements under major earthquakes. From the test results some suggestions are provided that could contribute favorable effect on the seismic behavior and the displacement of the building.展开更多
The vigorous development of urban commerce and the synergistic development of urban buildings promote the emergence and replication of urban business parks. In the long course of development, China's urban shoppin...The vigorous development of urban commerce and the synergistic development of urban buildings promote the emergence and replication of urban business parks. In the long course of development, China's urban shopping centers relied on regional centers and were dominated by a variety of industries, such as retail, catering, entertainment, entertainment, commerce, medical, visitor gathering, operating businesses through venues and facilities, and equipment leasing. Business park is a kind of urban management form which can efficiently use land resources and save space cost. The concept of green ecological design must be introduced into the teaching of architecture and environment design. In the beginning of the design of a specific architectural design and the effective design and construction process, we first learned that the building is external and internal characteristics, which are identified in the whole design process, so as to provide and optimize these structures for the subsequent subsequent architectural activities.展开更多
As building-integrated photovoltaic (BIPV) facade systems are applied to the facades of high-density urban building clusters, complex dynamic shadows significantly impact the photovoltaic (PV) performance of the build...As building-integrated photovoltaic (BIPV) facade systems are applied to the facades of high-density urban building clusters, complex dynamic shadows significantly impact the photovoltaic (PV) performance of the buildings. However, existing methods for calculating building surface shadows exhibit low computational efficiency in handling complex high-density scenarios. This paper proposes a multiscale spatiotemporal selection (MSTS) calculation method for dynamic shadows in complex, high-density environments. The method eliminates irrelevant building surfaces from both spatial and temporal dimensions, and utilizes the interpolation method to reduce the number of calculations. It integrates a “direction-distance-backlit-temporal” selection model and provides an optimal sorting scheme to accelerate the preprocessing of shadow calculations. This study validates the computational efficiency and accuracy of the proposed MSTS method through two practical case studies. In Case 1, focusing on a PV facade within a complex high-density building clusters in downtown Chengdu, the method achieved a 96% reduction in computational time compared to mature commercial software and at least a 45% improvement over existing acceleration methods, with a mean absolute percentage error (MAPE) of 1.6% for the sunlit area ratio (SAR). The results indicate that, compared to existing methods, the proposed approach significantly improves computational efficiency while maintaining a high level of accuracy. In Case 2, concerning a PV facade in an industrial park in Zhuhai, a comparison with data from an on-site experimental platform yielded an SAR MAPE of 1.83% over the study period. In summary, the calculated results demonstrate a high degree of consistency with real-world observations, with only minimal deviations, thereby validating the reliability of the proposed approach. These results indicate that the proposed method can efficiently and accurately evaluate the shading effects in complex, high-density urban environments, thereby providing robust support for the performance assessment of BIPV facade systems.展开更多
In response to the distinctly different heating load characteristics within heterogeneous building complex,traditional heating load allocation strategies based on fixed weights can no longer meet the requirements for ...In response to the distinctly different heating load characteristics within heterogeneous building complex,traditional heating load allocation strategies based on fixed weights can no longer meet the requirements for energy conservation and improving indoor temperature satisfaction rates.This study addresses this problem by proposing an adaptive-weighted multi-objective reinforcement learning(Adaptive-Weighted MORL)framework for a heterogeneous building complex comprising a training gym,office building,dormitory,and cafeteria.The framework achieves dynamic balance optimization between heating load and thermal comfort through an adaptive weight adjustment mechanism integrating proximal policy optimization(PPO)algorithm and non-dominated sorting genetic algorithm II(NSGA-II).PPO learns optimal heating load allocation strategies to adapt to environmental changes,while NSGA-II generates Pareto-optimal solution sets to guide PPO’s weight coefficient updates.This mechanism dynamically adjusts the heating load weight and thermal comfort weight,prioritizing thermal comfort weight under extreme weather conditions.Results demonstrate that,compared to the PPO method and traditional fixed-weight approach,the proposed framework achieves an overall energy saving rate of 22.1%,and a peak heating load reduction exceeding 40%,while maintaining indoor temperature satisfaction rates above 91%in most building types.Notably,under extreme conditions(such as the peak load day of March 17),the framework achieves a 39%peak reduction rate and a 22.2%daily energy saving rate.These findings thoroughly validate its effectiveness in complex dynamic environments.Overall,this framework provides an intelligent solution for optimizing heating load allocation across heterogeneous building types,effectively balancing the conflicting objectives of energy efficiency and thermal comfort while adapting to dynamic environmental conditions.展开更多
文摘The Poincare-Bertrand formula takes an important position in the study of complex singular integral. The Poincare-Bertrand formula on the complex sphere in the multidimensional complex Euclidian spaces was given by Sheng Gong. Using the method of solid angular coefficient, the authors extend the Poincare-Bertrand formula on the complex sphere to the building domain of the complex biballs, and obtain a more general Poincare- Bertrand formula with the solid angular coefficients.
基金Supported by the NNSF of china(11171298)SuppoSed by the Natural Science Foundation of Zhejiang Province(Y6110425,Y604563)
文摘By means of the method of solid angle coefficients and the permutation formula on the building domain of complex biballs,direct solutions of some singular integral equations with variable coefficients are discussed and the explicit formulas for these solutions are obtained.
基金National Natural Science Foundation of China Under Grant No. 50708071National Basic Research of China Under Grant No. 2007CB714202+1 种基金National Key Technology R&D Program Under Grant No. 2006BAJ13B01Shanghai Educational Development Foundation Under Grant No. 2007CG27
文摘Many single-tower reinforced concrete core wall-steel frame （RCC-SF） buildings have been built in China, but there are no buildings of different-height multi-tower hybrid system. A multi-tower RCC-SF tall building was thus studied because of its structural complexity and irregularity. First, a 1/15 scaled model structure was designed and tested on the shake table under minor, moderate, and major earthquake levels. Then, the dynamic responses of the model structure were interpreted to those of the prototype structure according to the similitude theory. Experimental results demonstrate that, despite the complexity of the structure, the lateral deformation bends as the ＂bending type＂ and the RC core walls contribute more than the steel frames to resist seismic loads. The maximum inter-story drift of the complex building under minor earthquakes is slightly beyond the elastic limitation specified in the Chinese code, and meets code requirements under major earthquakes. From the test results some suggestions are provided that could contribute favorable effect on the seismic behavior and the displacement of the building.
文摘The vigorous development of urban commerce and the synergistic development of urban buildings promote the emergence and replication of urban business parks. In the long course of development, China's urban shopping centers relied on regional centers and were dominated by a variety of industries, such as retail, catering, entertainment, entertainment, commerce, medical, visitor gathering, operating businesses through venues and facilities, and equipment leasing. Business park is a kind of urban management form which can efficiently use land resources and save space cost. The concept of green ecological design must be introduced into the teaching of architecture and environment design. In the beginning of the design of a specific architectural design and the effective design and construction process, we first learned that the building is external and internal characteristics, which are identified in the whole design process, so as to provide and optimize these structures for the subsequent subsequent architectural activities.
基金Shenzhen University and China State Construction International Horizontal Project“Research on Key Technologies of BIM-based BIPV Design and Operation&Maintenance”(Project No.CSCI-2023-Z-8)Shenzhen University Graduate Student Innovation and Entrepreneurship Training Program,under the project titled“Research on the Energy Efficiency of Building-Integrated Photovoltaic(BIPV)Facades Systems”(Project No.868-000002020265).Additionally,the authors wish to acknowledge the contributions of all colleagues and staff at Shenzhen University and China State Construction International who provided valuable insights and assistance during the course of this study.
文摘As building-integrated photovoltaic (BIPV) facade systems are applied to the facades of high-density urban building clusters, complex dynamic shadows significantly impact the photovoltaic (PV) performance of the buildings. However, existing methods for calculating building surface shadows exhibit low computational efficiency in handling complex high-density scenarios. This paper proposes a multiscale spatiotemporal selection (MSTS) calculation method for dynamic shadows in complex, high-density environments. The method eliminates irrelevant building surfaces from both spatial and temporal dimensions, and utilizes the interpolation method to reduce the number of calculations. It integrates a “direction-distance-backlit-temporal” selection model and provides an optimal sorting scheme to accelerate the preprocessing of shadow calculations. This study validates the computational efficiency and accuracy of the proposed MSTS method through two practical case studies. In Case 1, focusing on a PV facade within a complex high-density building clusters in downtown Chengdu, the method achieved a 96% reduction in computational time compared to mature commercial software and at least a 45% improvement over existing acceleration methods, with a mean absolute percentage error (MAPE) of 1.6% for the sunlit area ratio (SAR). The results indicate that, compared to existing methods, the proposed approach significantly improves computational efficiency while maintaining a high level of accuracy. In Case 2, concerning a PV facade in an industrial park in Zhuhai, a comparison with data from an on-site experimental platform yielded an SAR MAPE of 1.83% over the study period. In summary, the calculated results demonstrate a high degree of consistency with real-world observations, with only minimal deviations, thereby validating the reliability of the proposed approach. These results indicate that the proposed method can efficiently and accurately evaluate the shading effects in complex, high-density urban environments, thereby providing robust support for the performance assessment of BIPV facade systems.
文摘In response to the distinctly different heating load characteristics within heterogeneous building complex,traditional heating load allocation strategies based on fixed weights can no longer meet the requirements for energy conservation and improving indoor temperature satisfaction rates.This study addresses this problem by proposing an adaptive-weighted multi-objective reinforcement learning(Adaptive-Weighted MORL)framework for a heterogeneous building complex comprising a training gym,office building,dormitory,and cafeteria.The framework achieves dynamic balance optimization between heating load and thermal comfort through an adaptive weight adjustment mechanism integrating proximal policy optimization(PPO)algorithm and non-dominated sorting genetic algorithm II(NSGA-II).PPO learns optimal heating load allocation strategies to adapt to environmental changes,while NSGA-II generates Pareto-optimal solution sets to guide PPO’s weight coefficient updates.This mechanism dynamically adjusts the heating load weight and thermal comfort weight,prioritizing thermal comfort weight under extreme weather conditions.Results demonstrate that,compared to the PPO method and traditional fixed-weight approach,the proposed framework achieves an overall energy saving rate of 22.1%,and a peak heating load reduction exceeding 40%,while maintaining indoor temperature satisfaction rates above 91%in most building types.Notably,under extreme conditions(such as the peak load day of March 17),the framework achieves a 39%peak reduction rate and a 22.2%daily energy saving rate.These findings thoroughly validate its effectiveness in complex dynamic environments.Overall,this framework provides an intelligent solution for optimizing heating load allocation across heterogeneous building types,effectively balancing the conflicting objectives of energy efficiency and thermal comfort while adapting to dynamic environmental conditions.
