In principle,nature reserves are managed and controlled according to the core area and the general control area.At present,there is no relevant design specification for the design system of patrol road in various prot...In principle,nature reserves are managed and controlled according to the core area and the general control area.At present,there is no relevant design specification for the design system of patrol road in various protected areas.This paper analyzed the factors to be considered in determining the grade,horizontal and vertical design indicators,and cross section indicators of the patrol road in the protected area,and came up with the corresponding design indicators and parameters,so as to provide a certain reference for the subsequent patrol road design.展开更多
After analyzing three misunderstandings about eco-tourism development,the paper pointed out that low-carbon tourism based on control of carbon emission had larger implementation space,which could be applied in all typ...After analyzing three misunderstandings about eco-tourism development,the paper pointed out that low-carbon tourism based on control of carbon emission had larger implementation space,which could be applied in all types of tourist destinations,with strong operability and the effectiveness evaluation of which was easier to be quantized.On this basis,low-carbon development thought of nature reserve was proposed by taking Guangxi Longhu Mountain Nature Reserve as the example.Through introduction of general situation of low-carbon tourist resources in Longhu Mountain,it analyzed necessity to design low-carbon tourist products in Longhu Mountain Nature Reserve,designed low-carbon tourist activities according to resources characteristics,and proposed five distinctive low-carbon tour routes in light with different tourists markets.Finally,some relevant suggestions on development had been put forward.展开更多
In the past 20 years,recycled aggregate concrete(RAC),as a type of low-carbon concrete,has become a worldwide focus of research.However,the design methodology for RAC structural components remains a challenge.Conseque...In the past 20 years,recycled aggregate concrete(RAC),as a type of low-carbon concrete,has become a worldwide focus of research.However,the design methodology for RAC structural components remains a challenge.Consequently,demands for a unified design of natural aggregate concrete(NAC)and RAC components have been presented.Accordingly,this study analyses the necessity of a unified design theory and provides an in-depth demonstration of the strength determination,compressive constitutive relationship,and design method of concrete components.The coefficient of variation of RAC strength is found to be generally higher than that of NAC strength.The compressive and tensile strengths of RAC can be defined and determined using the same method as that used for NAC.The uniaxial compressive constitutive relationship between NAC and RAC has a unified mathematical expression.However,the elastic modulus of RAC decreases,and its brittleness exhibits an increasing trend compared with that of NAC.Finally,to unify the design formulae of RAC and NAC components for bearing capacity,modification factors for RAC components are proposed considering safety and reliability.Additionally,the feasibility of the proposed unified time-dependent design theory is demonstrated in terms of conceptual design and structural measures considering the effects of strength degradation and reinforcement corrosion.It is believed that this study enriches and develops the basic theory of concrete structures.展开更多
Nature is an information sourcebook of behaviour, function, colour and shape which can inspire visual design and invention. Studying the form and functional characteristics of a natural object can provide inspiration ...Nature is an information sourcebook of behaviour, function, colour and shape which can inspire visual design and invention. Studying the form and functional characteristics of a natural object can provide inspiration for product design and help to improve the marketability of manufactured products. The inspiration can be triggered either by direct observation or captured by three-dimensional (3D) digitising techniques to obtain superficial information (geometry and colour). An art designer often creates a concept in the form of a two-dimensional (2D) sketch while engineering methods lead to a point cloud in 3D. Each has its limitations in that the art designer commonly lacks the knowledge to build a final product from a 2D sketch and the engi- neering designer's 3D point clouds may not be very beautiful. We propose a method for Product Design from Nature (PDN), coupling aesthetic intent and geometrical characteristics, exploring the interactions between designers and nature's systems in PDN. We believe that this approach would considerably reduce the lead time and cost of product design from nature.展开更多
Abstract A transonic, high Reynolds number natural laminar flow airfoil is designed and studied. The γ-θ transition model is combined with the shear stress transport (SST) k-w turbulence model to predict the trans...Abstract A transonic, high Reynolds number natural laminar flow airfoil is designed and studied. The γ-θ transition model is combined with the shear stress transport (SST) k-w turbulence model to predict the transition region for a laminar-turbulent boundary layer. The non-uniform free-form deformation (NFFD) method based on the non-uniform rational B-spline (NURBS) basis function is introduced to the airfoil parameterization. The non-dominated sorting genetic algorithm-II (NSGA-II) is used as the search algo- rithm, and the surrogate model based on the Kriging models is introduced to improve the efficiency of the optimization system. The optimization system is set up based on the above technologies, and the robust design about the uncertainty of the Mach number is carried out for NASA0412 airfoil. The optimized airfoil is analyzed and compared with the original airfoil. The results show that natural laminar flow can be achieved on a supercritical airfoil to improve the aerodynamic characteristic of airfoils.展开更多
From the perspective of habitats and species diversity in biodiversity,the species and richness of plants and animals in the campus green spaces of North China University of Technology were surveyed comprehensively by...From the perspective of habitats and species diversity in biodiversity,the species and richness of plants and animals in the campus green spaces of North China University of Technology were surveyed comprehensively by natural observation and field investigation.A total of 118 species of plants and 70species of animals were investigated.The relationship between plants and animals on the campus was analyzed qualitatively.Based on this,the richness of species in the plots suitable for natural education in the sites was investigated and analyzed,and the situations in different seasons were compared to plan natural education areas and trails.In addition,the ways to increase the biodiversity of the sites,the connection between habitats and landscape elements,and the setting of relevant landscape sites were discussed,and it was proposed to integrate more natural education methods to attract people to carry out natural education of biodiversity in the university campus with a learning atmosphere.展开更多
Conical origami structures are characterized by their substantial out-of-plane stiffness and energy-absorptioncapacity.Previous investigations have commonly focused on the static characteristics of these lightweight s...Conical origami structures are characterized by their substantial out-of-plane stiffness and energy-absorptioncapacity.Previous investigations have commonly focused on the static characteristics of these lightweight struc-tures.However,the efficient analysis of the natural vibrations of these structures is pivotal for designing conicalorigami structures with programmable stiffness and mass.In this paper,we propose a novel method to analyzethe natural vibrations of such structures by combining a symmetric substructuring method(SSM)and a gener-alized eigenvalue analysis.SSM exploits the inherent symmetry of the structure to decompose it into a finiteset of repetitive substructures.In doing so,we reduce the dimensions of matrices and improve computationalefficiency by adopting the stiffness and mass matrices of the substructures in the generalized eigenvalue analysis.Finite element simulations of pin-jointed models are used to validate the computational results of the proposedapproach.Moreover,the parametric analysis of the structures demonstrates the influences of the number of seg-ments along the circumference and the radius of the cone on the structural mass and natural frequencies of thestructures.Furthermore,we present a comparison between six-fold and four-fold conical origami structures anddiscuss the influence of various geometric parameters on their natural frequencies.This study provides a strategyfor efficiently analyzing the natural vibration of symmetric origami structures and has the potential to contributeto the efficient design and customization of origami metastructures with programmable stiffness.展开更多
The concept of "modeling after the nature" was introduced into embankment landscape design,types of embankment landscapes analyzed,and landscape design concepts of urban waterfront embankment proposed,to ref...The concept of "modeling after the nature" was introduced into embankment landscape design,types of embankment landscapes analyzed,and landscape design concepts of urban waterfront embankment proposed,to reflect and coordinate human-nature relationship,and achieve the harmony between human society and natural environment.展开更多
This paper analyses what is the concept of nature inspiration in relation to the innovative design of buildings, and the design characteristics of innovative design as well as the harmonious interactions of the past a...This paper analyses what is the concept of nature inspiration in relation to the innovative design of buildings, and the design characteristics of innovative design as well as the harmonious interactions of the past and the future in urban regeneration. This is with the aim of determining how to acquire inspirations from nature, and how to subsequently apply the visual or conceptual nature-inspired designs. Such nature-inspired designs seek to exploit the new concepts of biophilic design, such as bio-eco-friendly sustainable processes, creative designs, and systems which can be used to improve the urban environment. The goal of this research is to uncover out ways by which to apply new ideas inspired by nature for an innovative building design.展开更多
In the global context, the relationship between human beings and nature has been discussed in various fields of study. This paper introduced three of the important challenges in this relationship, which have, thus far...In the global context, the relationship between human beings and nature has been discussed in various fields of study. This paper introduced three of the important challenges in this relationship, which have, thus far, been only partially or implicitly acknowledged in design and planning. The aim was to elucidate the key disregarded and neglected aspects in the human-nature relationship that need to be considered in different phases of the design and planning of future projects. This paper will thus inform the designers and planners about the previously overlooked but important challenges in the human-nature relationship, which must be moved to the foreground of the design and planning processes. These challenges include the definition of the term “nature”, the reciprocal effects among scales and adhering to or going beyond environmental sustainability. As the main conclusion, the paper shows how these challenges can improve the mutually supportive interaction between human beings and nature in the field of design and planning. Specifically speaking, the paper discussed how to convert the overlooked challenges in the human-nature relationship into potentials in the design and planning process. The main applied methods for this paper were a review of the related literature and the appropriate analysis.展开更多
An old tradition of designing with nature had existed for thousands of years in ancient China. In order to achieve ideal living environment, people believed that they should use, repair, and improve the nature in an a...An old tradition of designing with nature had existed for thousands of years in ancient China. In order to achieve ideal living environment, people believed that they should use, repair, and improve the nature in an active but abstemious way, and a complete system of design theories and techniques gradually developed. The intellectual architects, in particular, pioneered the practical and theoretical developments, especially those in Tang dynasty made extraordinary contributions. Among them, Yuan lie (元结) and Liu Zongyuan (柳宗元) were particularly outstanding. They had different experiences but similar achievements in Yongzhou area, which was a remote, less-developed region but with beautiful landscapes. In this paper, the planning and design practices of these two intellectual architects were examined and compared. Their principles and methods of Design With Nature were summarized. Also, the historical influence of their works and its contemporary value were briefly discussed at last.展开更多
Through discussing effective utilization of regional natural resources under the background of globalization,combining with Richard Rogers' typical architectural and urban design works,this study analyzes his desi...Through discussing effective utilization of regional natural resources under the background of globalization,combining with Richard Rogers' typical architectural and urban design works,this study analyzes his design concepts of using regional natural resources from the perspectives of overall balance between architecture and natural environment,architectural function and detail control,application of proper technologies and new materials,then proposes a modern design pattern to create a better urban living environment by integrating regional natural resources and modern architectural technology.展开更多
Through summarizing and analyzing planning objectives, landscape division and natural ecological experience planning of Zhengzhou Forest Park, the authors discussed the application of human-nature harmony in the plann...Through summarizing and analyzing planning objectives, landscape division and natural ecological experience planning of Zhengzhou Forest Park, the authors discussed the application of human-nature harmony in the planning, stressed citizens' needs for experiencing natural ecological environment, and tried to build Zhengzhou Forest Park with picturesque scenery, complete facilities, and harmonious human-nature coexistence.展开更多
This investigation and morphology analysis of porous structure of some kinds of natural materials such as chicken eggshell, partridge eggshell, pig bone, and seeds of mung bean, soja, ginkgo, lotus seed, as well as th...This investigation and morphology analysis of porous structure of some kinds of natural materials such as chicken eggshell, partridge eggshell, pig bone, and seeds of mung bean, soja, ginkgo, lotus seed, as well as the epidermis of apples, with SEM (Scanning Electronic Microscope) showed that natural structures’ pores can be classified into uniform pores, gradient pores and multi pores from the viewpoint of the distribution variation of pore density, size and geometry. Furthermore, an optimal design of porous bearings was for the first time developed based on the gradient configuration of natural materials. The bionic design of porous structures is predicted to be widely developed and applied in the fields of materials and mechanical engineering in the future.展开更多
Based on the current indoor natural ventilation and lighting in the space of traditional residential buildings,this paper starts from the passive-design optimization of the spatial natural ventilation and lighting,and...Based on the current indoor natural ventilation and lighting in the space of traditional residential buildings,this paper starts from the passive-design optimization of the spatial natural ventilation and lighting,and makes quantitative evaluation on the quality of current interior natural ventilation and lighting for two typical residential buildings by three indexes,including wind speed,static wind area ratio and satisfaction ratio about minimum lighting coefficient. Based on that, this paper conducts the passive design optimization, and establishes the quantitative association and reevaluation among the passive reformation design, natural ventilation,and lighting environmental quality,proposing the general strategy for the existing residential buildings to respond to the passive reformation design of the natural ventilation and lighting. The special reconstruction of core functionary space of integration of "the living room + dining room + partial space"is researched,and the redesign for the optimization and replacement of both indoor and outdoor enclosure parts is explored,which is expected to provide practical exploration on the strategies for passive construction of spatial natural environmental quality within a large number of highly-energy-consumed residential buildings in China,as well as the green design of residential buildings.展开更多
With better understanding of the quality and physico-mechanical properties of rocks of dam foundation,and the physico-mechanical properties and structure design of arch dam in association with the foundation excavatio...With better understanding of the quality and physico-mechanical properties of rocks of dam foundation,and the physico-mechanical properties and structure design of arch dam in association with the foundation excavation of Xiluodu arch dam,the excavation optimization design was proposed for the foundation surface on the basis of feasibility study.Common analysis and numerical analysis results demonstrated the feasibility of using the weakly weathered rocks III1and III2as the foundation surface of super-high arch dam.In view of changes in the geological conditions at the dam foundation along the riverbed direction,the design of extending foundation surface excavation area and using consolidating grouting and optimizing structure of dam bottom was introduced,allowing for harmonization of the arch dam and foundation.Three-dimensional(3D)geomechanics model test and fi nite element analysis results indicated that the dam body and foundation have good overload stability and high bearing capacity.The monitoring data showed that the behaviors of dam and foundation correspond with the designed patterns in the construction period and the initial operation period.展开更多
In the near future,the Phase-Ⅱ beamline project of Shanghai Synchrotron Radiation Facility(SSRF)will be implemented and some dipoles in the storage ring will be replaced by high field dipoles(super-bend),so as to lea...In the near future,the Phase-Ⅱ beamline project of Shanghai Synchrotron Radiation Facility(SSRF)will be implemented and some dipoles in the storage ring will be replaced by high field dipoles(super-bend),so as to leave room for short straight sections.In this way,the brightness of the hard x-ray emitted from the super-bends can be enhanced,and more insertion devices can be installed.In this paper,super-bends of two lengths are discussed and the corresponding lattices are presented.展开更多
The concept of " natural forces" is proposed in farming field for the first time,and the core theory of Fenlong tillage is illustrated. This tillage method provides " super plough layer" and "...The concept of " natural forces" is proposed in farming field for the first time,and the core theory of Fenlong tillage is illustrated. This tillage method provides " super plough layer" and " super groundwater reservoir" by the machine,including six vertical spiral drills,can smash the soil vertically,without disorganizing soil layer. And this tillage method releases five " natural forces" with infinite space and time,including natural soil activation forces,natural fertility forces,natural water control forces,natural environment improvement forces,and natural river driving forces by activating various land resources. Fenlong tillage can significantly increase the source of high-quality food for human,and solve the problem of natural disasters by natural forces curing itself. It is proposed that the implementation of the " six key projects" by the " natural forces" of Fenlong tillage can solve the deep problems in China. The researchers suggest establishing Fenlong tillage great science engineering which could solve the problem of harmonious symbiosis between man and nature. The present results indicate that Fenlong tillage erupts super natural forces with infinite space and time,which can be used as a deep tillage practice to maintain the natural and environmental beauty of the earth forever.展开更多
文摘In principle,nature reserves are managed and controlled according to the core area and the general control area.At present,there is no relevant design specification for the design system of patrol road in various protected areas.This paper analyzed the factors to be considered in determining the grade,horizontal and vertical design indicators,and cross section indicators of the patrol road in the protected area,and came up with the corresponding design indicators and parameters,so as to provide a certain reference for the subsequent patrol road design.
基金Supported by Scientific Research Item of Education Department of Guangxi Province in2010(201010LX282)Teaching Reform Project of Guangxi Teachers Education University from 2010 to 2011~~
文摘After analyzing three misunderstandings about eco-tourism development,the paper pointed out that low-carbon tourism based on control of carbon emission had larger implementation space,which could be applied in all types of tourist destinations,with strong operability and the effectiveness evaluation of which was easier to be quantized.On this basis,low-carbon development thought of nature reserve was proposed by taking Guangxi Longhu Mountain Nature Reserve as the example.Through introduction of general situation of low-carbon tourist resources in Longhu Mountain,it analyzed necessity to design low-carbon tourist products in Longhu Mountain Nature Reserve,designed low-carbon tourist activities according to resources characteristics,and proposed five distinctive low-carbon tour routes in light with different tourists markets.Finally,some relevant suggestions on development had been put forward.
基金the financial support from the Distinguished Young Scholars of China by the National Natural Science Foundation of China(51325802)the National Natural Science Foundation of China(51178340,52078358,and 52008304)。
文摘In the past 20 years,recycled aggregate concrete(RAC),as a type of low-carbon concrete,has become a worldwide focus of research.However,the design methodology for RAC structural components remains a challenge.Consequently,demands for a unified design of natural aggregate concrete(NAC)and RAC components have been presented.Accordingly,this study analyses the necessity of a unified design theory and provides an in-depth demonstration of the strength determination,compressive constitutive relationship,and design method of concrete components.The coefficient of variation of RAC strength is found to be generally higher than that of NAC strength.The compressive and tensile strengths of RAC can be defined and determined using the same method as that used for NAC.The uniaxial compressive constitutive relationship between NAC and RAC has a unified mathematical expression.However,the elastic modulus of RAC decreases,and its brittleness exhibits an increasing trend compared with that of NAC.Finally,to unify the design formulae of RAC and NAC components for bearing capacity,modification factors for RAC components are proposed considering safety and reliability.Additionally,the feasibility of the proposed unified time-dependent design theory is demonstrated in terms of conceptual design and structural measures considering the effects of strength degradation and reinforcement corrosion.It is believed that this study enriches and develops the basic theory of concrete structures.
文摘Nature is an information sourcebook of behaviour, function, colour and shape which can inspire visual design and invention. Studying the form and functional characteristics of a natural object can provide inspiration for product design and help to improve the marketability of manufactured products. The inspiration can be triggered either by direct observation or captured by three-dimensional (3D) digitising techniques to obtain superficial information (geometry and colour). An art designer often creates a concept in the form of a two-dimensional (2D) sketch while engineering methods lead to a point cloud in 3D. Each has its limitations in that the art designer commonly lacks the knowledge to build a final product from a 2D sketch and the engi- neering designer's 3D point clouds may not be very beautiful. We propose a method for Product Design from Nature (PDN), coupling aesthetic intent and geometrical characteristics, exploring the interactions between designers and nature's systems in PDN. We believe that this approach would considerably reduce the lead time and cost of product design from nature.
文摘Abstract A transonic, high Reynolds number natural laminar flow airfoil is designed and studied. The γ-θ transition model is combined with the shear stress transport (SST) k-w turbulence model to predict the transition region for a laminar-turbulent boundary layer. The non-uniform free-form deformation (NFFD) method based on the non-uniform rational B-spline (NURBS) basis function is introduced to the airfoil parameterization. The non-dominated sorting genetic algorithm-II (NSGA-II) is used as the search algo- rithm, and the surrogate model based on the Kriging models is introduced to improve the efficiency of the optimization system. The optimization system is set up based on the above technologies, and the robust design about the uncertainty of the Mach number is carried out for NASA0412 airfoil. The optimized airfoil is analyzed and compared with the original airfoil. The results show that natural laminar flow can be achieved on a supercritical airfoil to improve the aerodynamic characteristic of airfoils.
基金Sponsored by National Natural Science Foundation of China(52278045)。
文摘From the perspective of habitats and species diversity in biodiversity,the species and richness of plants and animals in the campus green spaces of North China University of Technology were surveyed comprehensively by natural observation and field investigation.A total of 118 species of plants and 70species of animals were investigated.The relationship between plants and animals on the campus was analyzed qualitatively.Based on this,the richness of species in the plots suitable for natural education in the sites was investigated and analyzed,and the situations in different seasons were compared to plan natural education areas and trails.In addition,the ways to increase the biodiversity of the sites,the connection between habitats and landscape elements,and the setting of relevant landscape sites were discussed,and it was proposed to integrate more natural education methods to attract people to carry out natural education of biodiversity in the university campus with a learning atmosphere.
基金supported by the National Natural Science Foundation of China(Grants Nos.51978150 and 52050410334)the Postgraduate Research&Practice Innovation Program of Jiangsu Province(Grants No.SJCX23_0069)the Fundamental Research Funds for the Central Universities.
文摘Conical origami structures are characterized by their substantial out-of-plane stiffness and energy-absorptioncapacity.Previous investigations have commonly focused on the static characteristics of these lightweight struc-tures.However,the efficient analysis of the natural vibrations of these structures is pivotal for designing conicalorigami structures with programmable stiffness and mass.In this paper,we propose a novel method to analyzethe natural vibrations of such structures by combining a symmetric substructuring method(SSM)and a gener-alized eigenvalue analysis.SSM exploits the inherent symmetry of the structure to decompose it into a finiteset of repetitive substructures.In doing so,we reduce the dimensions of matrices and improve computationalefficiency by adopting the stiffness and mass matrices of the substructures in the generalized eigenvalue analysis.Finite element simulations of pin-jointed models are used to validate the computational results of the proposedapproach.Moreover,the parametric analysis of the structures demonstrates the influences of the number of seg-ments along the circumference and the radius of the cone on the structural mass and natural frequencies of thestructures.Furthermore,we present a comparison between six-fold and four-fold conical origami structures anddiscuss the influence of various geometric parameters on their natural frequencies.This study provides a strategyfor efficiently analyzing the natural vibration of symmetric origami structures and has the potential to contributeto the efficient design and customization of origami metastructures with programmable stiffness.
基金Sponsored by Jiangxi Waterfront Embankment Landscape Design Research
文摘The concept of "modeling after the nature" was introduced into embankment landscape design,types of embankment landscapes analyzed,and landscape design concepts of urban waterfront embankment proposed,to reflect and coordinate human-nature relationship,and achieve the harmony between human society and natural environment.
文摘This paper analyses what is the concept of nature inspiration in relation to the innovative design of buildings, and the design characteristics of innovative design as well as the harmonious interactions of the past and the future in urban regeneration. This is with the aim of determining how to acquire inspirations from nature, and how to subsequently apply the visual or conceptual nature-inspired designs. Such nature-inspired designs seek to exploit the new concepts of biophilic design, such as bio-eco-friendly sustainable processes, creative designs, and systems which can be used to improve the urban environment. The goal of this research is to uncover out ways by which to apply new ideas inspired by nature for an innovative building design.
文摘In the global context, the relationship between human beings and nature has been discussed in various fields of study. This paper introduced three of the important challenges in this relationship, which have, thus far, been only partially or implicitly acknowledged in design and planning. The aim was to elucidate the key disregarded and neglected aspects in the human-nature relationship that need to be considered in different phases of the design and planning of future projects. This paper will thus inform the designers and planners about the previously overlooked but important challenges in the human-nature relationship, which must be moved to the foreground of the design and planning processes. These challenges include the definition of the term “nature”, the reciprocal effects among scales and adhering to or going beyond environmental sustainability. As the main conclusion, the paper shows how these challenges can improve the mutually supportive interaction between human beings and nature in the field of design and planning. Specifically speaking, the paper discussed how to convert the overlooked challenges in the human-nature relationship into potentials in the design and planning process. The main applied methods for this paper were a review of the related literature and the appropriate analysis.
文摘An old tradition of designing with nature had existed for thousands of years in ancient China. In order to achieve ideal living environment, people believed that they should use, repair, and improve the nature in an active but abstemious way, and a complete system of design theories and techniques gradually developed. The intellectual architects, in particular, pioneered the practical and theoretical developments, especially those in Tang dynasty made extraordinary contributions. Among them, Yuan lie (元结) and Liu Zongyuan (柳宗元) were particularly outstanding. They had different experiences but similar achievements in Yongzhou area, which was a remote, less-developed region but with beautiful landscapes. In this paper, the planning and design practices of these two intellectual architects were examined and compared. Their principles and methods of Design With Nature were summarized. Also, the historical influence of their works and its contemporary value were briefly discussed at last.
基金Supported by Programs of Humanities and Social Sciences,the Ministry of Education (10YJCZH132)Henan Provincial Program for Tackling Key Scientific and Technological Problems (102102310414)Decision Research Program of Henan Provincial Government (2011B795)~~
文摘Through discussing effective utilization of regional natural resources under the background of globalization,combining with Richard Rogers' typical architectural and urban design works,this study analyzes his design concepts of using regional natural resources from the perspectives of overall balance between architecture and natural environment,architectural function and detail control,application of proper technologies and new materials,then proposes a modern design pattern to create a better urban living environment by integrating regional natural resources and modern architectural technology.
文摘Through summarizing and analyzing planning objectives, landscape division and natural ecological experience planning of Zhengzhou Forest Park, the authors discussed the application of human-nature harmony in the planning, stressed citizens' needs for experiencing natural ecological environment, and tried to build Zhengzhou Forest Park with picturesque scenery, complete facilities, and harmonious human-nature coexistence.
文摘This investigation and morphology analysis of porous structure of some kinds of natural materials such as chicken eggshell, partridge eggshell, pig bone, and seeds of mung bean, soja, ginkgo, lotus seed, as well as the epidermis of apples, with SEM (Scanning Electronic Microscope) showed that natural structures’ pores can be classified into uniform pores, gradient pores and multi pores from the viewpoint of the distribution variation of pore density, size and geometry. Furthermore, an optimal design of porous bearings was for the first time developed based on the gradient configuration of natural materials. The bionic design of porous structures is predicted to be widely developed and applied in the fields of materials and mechanical engineering in the future.
基金Sponsored by the Key Project of National Natural Science Foundation of China (Grant No.51138004)the South China Key Laboratory Fund (Grant No.20121458321)the Architect Design on Energy-saving Residence in Shanghai (Grant No.08-2A-0183-zong)
文摘Based on the current indoor natural ventilation and lighting in the space of traditional residential buildings,this paper starts from the passive-design optimization of the spatial natural ventilation and lighting,and makes quantitative evaluation on the quality of current interior natural ventilation and lighting for two typical residential buildings by three indexes,including wind speed,static wind area ratio and satisfaction ratio about minimum lighting coefficient. Based on that, this paper conducts the passive design optimization, and establishes the quantitative association and reevaluation among the passive reformation design, natural ventilation,and lighting environmental quality,proposing the general strategy for the existing residential buildings to respond to the passive reformation design of the natural ventilation and lighting. The special reconstruction of core functionary space of integration of "the living room + dining room + partial space"is researched,and the redesign for the optimization and replacement of both indoor and outdoor enclosure parts is explored,which is expected to provide practical exploration on the strategies for passive construction of spatial natural environmental quality within a large number of highly-energy-consumed residential buildings in China,as well as the green design of residential buildings.
文摘With better understanding of the quality and physico-mechanical properties of rocks of dam foundation,and the physico-mechanical properties and structure design of arch dam in association with the foundation excavation of Xiluodu arch dam,the excavation optimization design was proposed for the foundation surface on the basis of feasibility study.Common analysis and numerical analysis results demonstrated the feasibility of using the weakly weathered rocks III1and III2as the foundation surface of super-high arch dam.In view of changes in the geological conditions at the dam foundation along the riverbed direction,the design of extending foundation surface excavation area and using consolidating grouting and optimizing structure of dam bottom was introduced,allowing for harmonization of the arch dam and foundation.Three-dimensional(3D)geomechanics model test and fi nite element analysis results indicated that the dam body and foundation have good overload stability and high bearing capacity.The monitoring data showed that the behaviors of dam and foundation correspond with the designed patterns in the construction period and the initial operation period.
文摘In the near future,the Phase-Ⅱ beamline project of Shanghai Synchrotron Radiation Facility(SSRF)will be implemented and some dipoles in the storage ring will be replaced by high field dipoles(super-bend),so as to leave room for short straight sections.In this way,the brightness of the hard x-ray emitted from the super-bends can be enhanced,and more insertion devices can be installed.In this paper,super-bends of two lengths are discussed and the corresponding lattices are presented.
基金Supported by Science and Technology Major Project of Guangxi(Guike AA17204037,Guike AA16380017)Science and Technology Development Fund of Guangxi Academy of Agricultural Sciences(2015YT60)Collaborative Innovation Fund of Guangxi Academy of Agricultural Sciences(Guinongke 2017YZ06)
文摘The concept of " natural forces" is proposed in farming field for the first time,and the core theory of Fenlong tillage is illustrated. This tillage method provides " super plough layer" and " super groundwater reservoir" by the machine,including six vertical spiral drills,can smash the soil vertically,without disorganizing soil layer. And this tillage method releases five " natural forces" with infinite space and time,including natural soil activation forces,natural fertility forces,natural water control forces,natural environment improvement forces,and natural river driving forces by activating various land resources. Fenlong tillage can significantly increase the source of high-quality food for human,and solve the problem of natural disasters by natural forces curing itself. It is proposed that the implementation of the " six key projects" by the " natural forces" of Fenlong tillage can solve the deep problems in China. The researchers suggest establishing Fenlong tillage great science engineering which could solve the problem of harmonious symbiosis between man and nature. The present results indicate that Fenlong tillage erupts super natural forces with infinite space and time,which can be used as a deep tillage practice to maintain the natural and environmental beauty of the earth forever.