The water-conducting network of capillaries in vascular plants has evolved over hundreds of millions of years in order to be able to cope with bubble clogging,a problem which also affects modern microfluidic devices.D...The water-conducting network of capillaries in vascular plants has evolved over hundreds of millions of years in order to be able to cope with bubble clogging,a problem which also affects modern microfluidic devices.Decades of anatomical studies have revealed that plants growing in habitats in which the formation of bubbles,or emboli,is likely to be a frequent occurrence often have various forms of geometrical sculpturing on the internal surfaces of the xylem conduits.The possible function of such wall sculpturing has long been the subject of speculation.We have investigated the hypothesis that wall sculpturing is a functional adaptation designed to increase the wettability of the walls of xylem conduits,an effect which could be described as the inverse of the well-known lotus-effect.Our results show that wall sculpturing does enhance wettability.Importantly,theoretical calculations reveal that the geometric parameters of various types of wall sculpturing are such that the resulting surfaces are sufficiently rough to enhance wettability,but not significantly rougher.The results provide an appealing answer to the long-standing debate on the function of wall sculpturing in xylem conduits,and may provide biomimetic clues for new approaches to the removal of bubbles in microfluidic channels.展开更多
The achene wail anatomy and surface sculpturing of 14 species representing Lactuca L. and related genera were Investigated to evaluate inter-and Intrageneric relationships. The achene wall anatomy of the studied speci...The achene wail anatomy and surface sculpturing of 14 species representing Lactuca L. and related genera were Investigated to evaluate inter-and Intrageneric relationships. The achene wall anatomy of the studied species can be divided Into two types： winged and ribbed. The winged type is present in Lactuca L., Pterocypsela Shlh, Clcerblta Wallr., Chaetoserls Shlh and Stenoseris Shlh, and is characterized by protruding wings and costae in transverse section. Winged type achene mesocarps are composed of parenchymatous cells and fiber ceils, and the distinct fibrous strands are confined to the costae or wings of the achenes. The ribbed type is present in Notoseris Shih and Paraprenanthes Chang ex Shih, and Is characterized by only having costae In transverse section. Fiber cells are continuous in the costae and intercostae, in surface sculpturing, the ornamentation and the shape of epidermal cells are different among these genera. The results Indicate that L. altalca and L. serrlola should be conspeclfic, and that L. dollchophylla is probably an Intermediate taxon between Lactuca and Chaetoserls. The results also support the separation of Pterocypseia, Paraprenanthes, Notoseris, Chaetoseris and Stenoserls from Lactuca and Clcerblta as independent entitles. Close affinities between Pterocypsela and Lactuca, Paraprenanthes and Notoserls, and Chaetoserls and Stenoserls are also proposed.展开更多
1 Thousands of giant panda sculptures greeted residents and tourists starting on December 7,2024,in Hong Kong region,where enthusiasm for the pandas had grown since two cubs were born in a local theme park.2 The 2,500...1 Thousands of giant panda sculptures greeted residents and tourists starting on December 7,2024,in Hong Kong region,where enthusiasm for the pandas had grown since two cubs were born in a local theme park.2 The 2,500 exhibits were shown at a launch ceremony of PANDA GO!FEST HK,the city's largest panda‑themed exhibition,at Hong Kong's airport on December 2,2024.They were next publicly displayed at the Avenue of Stars in Tsim Sha Tsui,a popular shopping district,before moving to three other locations that month.展开更多
Operating under the philosophy that play is a child's right,Anthill Creations,a non‑profit run by Pooja Rai,has so far built 283 different play spaces using almost entirely painted tires,featuring large tire sculp...Operating under the philosophy that play is a child's right,Anthill Creations,a non‑profit run by Pooja Rai,has so far built 283 different play spaces using almost entirely painted tires,featuring large tire sculptures of cars,buildings or animals,paired with more classic elements of swings,see‑saws and jungle gyms.展开更多
Digital sculpture is the product of the cross-integration of art and technology,and its development is accompanied by the two-way interaction between technological innovation and artistic concepts.Based on this,this p...Digital sculpture is the product of the cross-integration of art and technology,and its development is accompanied by the two-way interaction between technological innovation and artistic concepts.Based on this,this paper mainly analyzes the remolding of artistic creation logic by technical tools and the expansion of technical application boundary by artistic expression,and further reveals the dynamic balance relationship between the two in symbiosis,hoping to help understand the accompanying mechanism of art and technology in the digital age.展开更多
The first thing to know about the Museum of Underwater Art(MOUA)is that it is not a traditional museum housed in a building—it's a series of installations(现代雕塑装置)and sculptures within the Great Barrier Reef...The first thing to know about the Museum of Underwater Art(MOUA)is that it is not a traditional museum housed in a building—it's a series of installations(现代雕塑装置)and sculptures within the Great Barrier Reef Marine Park.展开更多
On-machine inspection has a significant impact on improving high-precision and efficient machining of sculptured surfaces. Due to the lack of machining information and the inability to adapt the parameters to the dyna...On-machine inspection has a significant impact on improving high-precision and efficient machining of sculptured surfaces. Due to the lack of machining information and the inability to adapt the parameters to the dynamic cutting conditions, theoretical modeling of profile inspection usually leads to insufficient adaptation, which causes inaccuracy problems. To address the above issues, a novel coupled model for profile inspection is proposed by combining the theoretical model and the data-driven model. The key process is to first realize local feature extraction based on the acquired vibration signals. The hybrid sampling model, which fuses geometric feature terms and vibration feature terms, is modeled by the lever principle. Then, the weight of each feature term is adaptively assigned by a multi-objective multi-verse optimizer.Finally, an inspection error compensation model based on the attention mechanism considering different probe postures is proposed to reduce the impact of pre-travel and radius errors on inspection accuracy. The anisotropy of the probe system error and its influence mechanism on the inspection accuracy are analyzed quantitatively and qualitatively. Compared with the previous models, the proposed hybrid profile inspection model can significantly improve the accuracy and efficiency of on-machine sampling. The proposed compensation model is able to correct the inspection errors with better accuracy. Simulations and experiments demonstrate the feasibility and validity of the proposed methods. The proposed model and corresponding new findings contribute to high-precision and efficient on-machine inspection, and help to understand the coupling mechanism of inspection errors.展开更多
The novel Hypatia:Or New Foes With an Old Face by Charles Kingsley,published in 1853,provided valuable insight into Hypatia’s achievements and the unfortunate circumstances surrounding her untimely demise.Kingsley’s...The novel Hypatia:Or New Foes With an Old Face by Charles Kingsley,published in 1853,provided valuable insight into Hypatia’s achievements and the unfortunate circumstances surrounding her untimely demise.Kingsley’s novel portrayed a fiercely intelligent woman,Hypatia,who sparked the interest of many artists,particularly sculptors.They were eager to capture in their statues the personification of this remarkable ancient mathematician,philosopher,and scientist of ancient Egypt,Hypatia of Alexandria(355-415).This essay has two parts.The first provides a brief overview of Hypatia’s life and accomplishments.The second part focuses on four sculptures from the 19th century created by different artists:Hypatia(1873-1876)by the American Howard Roberts,Hypatia(1874)by the Italian Odoardo Tabacchi,Hypatia(1890)by Francis John Williamson,and Hypatia(1894)by Richard Claude Belt.The two latter works are by British sculptors.展开更多
This paper explores how sculpture,as a medium,has transcended traditional boundaries and evolved into a diverse form of artistic expression that engages with both physical and social dimensions.Tracing the evolution f...This paper explores how sculpture,as a medium,has transcended traditional boundaries and evolved into a diverse form of artistic expression that engages with both physical and social dimensions.Tracing the evolution from traditional materials and techniques to modernist breaks and conceptual art,this study delves into key turning points,including the shift towards abstraction,the role of the readymade,and the influence of site-specificity.It also examines how contemporary sculpture serves as a dynamic platform for addressing social,cultural,and political issues,fostering public engagement and transforming public spaces.By analyzing these developments,this paper highlights sculpture’s growing role as a medium that not only reflects but also shapes societal narratives.展开更多
Figurative sculpture and decorative elements belong to the same category of art;the development of sculpture art requires innovation and constant exploration of new development paths,while many characteristics of deco...Figurative sculpture and decorative elements belong to the same category of art;the development of sculpture art requires innovation and constant exploration of new development paths,while many characteristics of decorative elements can give the creation of sculpture works a variety of inspiration.This paper explores the significance of figurative sculpture and decorative elements,examining their intrinsic connections and historical practices.The study aims to uncover the potential of figurative sculpture in the creation of decorative elements,highlighting how the integration of these forms can contribute to the development of art and the creation of meaningful figurative sculptures.展开更多
In the field of contemporary sculpture creation,the rich culture and historical depth of Chinese ethnic minorities have attracted the widespread attention of artists.These creations not only emphasize external feature...In the field of contemporary sculpture creation,the rich culture and historical depth of Chinese ethnic minorities have attracted the widespread attention of artists.These creations not only emphasize external features such as ethnic costumes,totems,or life scenes but also touch deep spiritual contents including historical stories,religious beliefs,and living habits of ethnic minorities.This paper discusses the integration process of Chinese ethnic minority themes in figurative sculpture creation and the inheritance of the profound spirit of ethnic groups in this process.At the same time,this paper also places the diversified expression and innovative practice of these themes in sculpture art in the context of the new era for investigation and explores the far-reaching influence of its development on promoting cultural inheritance and artistic innovation.展开更多
The problem of finished surface being not first-order continuous commonly exists in machining sculptured surfaces with a torus cutter and some other types of cutters. To solve this problem, a dual drive curve tool pat...The problem of finished surface being not first-order continuous commonly exists in machining sculptured surfaces with a torus cutter and some other types of cutters. To solve this problem, a dual drive curve tool path planning method is proposed in this article. First, the maximum machining strip width of a whole tool path can be obtained through optimizing each tool position with multi-point machining （MPM） method. Second, two drive curves are then determined according to the obtained maximum machining strip width. Finally, the tool is positioned once more along the dual drive curve under the condition of tool path smoothness. A computer simulation and cutting experiments are carried out to testify the performance of the new method. The machined surface is measured with a coordinate measuring machine （CMM） to examine the machining quality. The results obtained show that this method can effectively eliminate sharp scallops between adjacent tool paths, keep tool paths smooth, and improve the surface machining quality as well as machining efficiency.展开更多
A 5-axis controller with curve interpolation function is developed to satisfy high-speed and high-precision computer numerical control (CNC) machining of machine parts with complex shapes in the authors-devised open C...A 5-axis controller with curve interpolation function is developed to satisfy high-speed and high-precision computer numerical control (CNC) machining of machine parts with complex shapes in the authors-devised open CNC system. The instruction for- mat of this interpolation method and the generation procedure of the numerical control (NC) files are introduced. The interpola- tion curves of both position vectors and orientation vectors constructed by the controller are C2 continuous and independent of machin...展开更多
A direct interpolation algorithm for spatial curves on a surface is proposed for pen-cutting of sculptured surfaces. The algorithm can carry out the direct interpolation for projective curves lying on the sculptured s...A direct interpolation algorithm for spatial curves on a surface is proposed for pen-cutting of sculptured surfaces. The algorithm can carry out the direct interpolation for projective curves lying on the sculptured surface. It is based on the geometric and kinetic relationships between drive curves and cutter-contact （C-C） curves. It evaluates the parameter of drive curves corresponding to interpolation points by the Taylor formula. Then it gains coordinates of interpolation points indirectly by inverse calculation. Finally, it generates the motion commands for machine tool controller. This method extends the locus-controlled function in the computer numerical control （CNC） system effectively and improves the efficiency for the numerical control （NC） machining of sculptured surfaces. The simulation shows that the proposed algorithm is feasible and practical. This algorithm can also be applied to the machining of the whole surface.展开更多
NC machining path of sculptured surfaces in CAD/CAM system plays an important role on manufacture. This paper describes a new algorithm for 5 axis machining of sculptured surfaces and the algorithm is interference fr...NC machining path of sculptured surfaces in CAD/CAM system plays an important role on manufacture. This paper describes a new algorithm for 5 axis machining of sculptured surfaces and the algorithm is interference free. The approach includes: (1) the tesselation of the parametric surfaces into triangles; (2) building topological relations among triangles;(3) 5 axis tool path generation; (4) interference detection and tool position correction.展开更多
Landscape design and sculpture art have gradually integrated into each other, as sculptures are no longer limited in art galleries but adapted to various environments, and gardens are trying to make earth into a great...Landscape design and sculpture art have gradually integrated into each other, as sculptures are no longer limited in art galleries but adapted to various environments, and gardens are trying to make earth into a great work of art by using sculptures. The interpenetrating and tolerance of sculpture and garden has changed the appearance of environmental landscape, and led to a new era of art and design.展开更多
By analyzing the role of public art in the construction and development of urban landscape, the concept of public art and its regional meaning are analyzed, the relation between public art and city sculpture is explai...By analyzing the role of public art in the construction and development of urban landscape, the concept of public art and its regional meaning are analyzed, the relation between public art and city sculpture is explained, it is pointed out that city sculpture could enhance the landscape of urban space and enrich public art. The functions of city sculpture are expounded in details, including guiding spatial communication, creating the sociality of humanistic environment, and communicating space with human. With the design of city sculpture at the entrance of Xiasi County in Southeast part of Guizhou Province for example, its location and status are analyzed, highlighting its special location advantages as well as the historical business climate, the sculpture integrates the ancient corn which represents commercial culture with butterfly which embodies the totem of Miao nationalities in Southeast Guizhou Province, therefore brings both the visual impact and culture features. Here the significance of regional city sculpture is summarized, it is emphasized that the city sculpture is the material carrier of city culture, the cultural source of original design elements and the concrete manifestation of regional spirit.展开更多
Rochlitz porphyry tuff(“Rochlitzer Porphyrtuff”),a slightly welded ignimbrite from the North Saxon Volcanic Complex–a Permian supervolcano in East Germany–was used for millstones already in Neolithic age.The first...Rochlitz porphyry tuff(“Rochlitzer Porphyrtuff”),a slightly welded ignimbrite from the North Saxon Volcanic Complex–a Permian supervolcano in East Germany–was used for millstones already in Neolithic age.The first use as building and sculpturing stone dates back to the early 12^(th) century,when quarries at the Rochlitz Mountain(“Rochlitzer Berg”)provided stone blocks for ashlars,sculptures and other purposes in the region between Leipzig and Chemnitz.In the first half of the 20th century,the material was used for buildings in many other German cities,like Berlin,Dresden,Frankfurt,Hamburg,and Munich.Moreover,it was applied in Kaliningrad(Russia),Vienna(Austria)as well as in some places in the Czech Republic,Poland and Denmark.The stone is presented with its petrographic and technical properties.Furthermore,the use in ancient and modern buildings,the quarrying techniques and heritage issues are discussed.The old quarry area of the Rochlitz Mountain is part of the German National Geopark“Porphyrland”,and two quarries are still producing stone for construction and restoration purposes as well as for sculptures.展开更多
By making use of the advantages of non-uniform rational B-spline （NURBS） curves to represent spatial curves, an instruction format with double NURBS curves suitable for 5-axis coordinated real-time interpolation is ...By making use of the advantages of non-uniform rational B-spline （NURBS） curves to represent spatial curves, an instruction format with double NURBS curves suitable for 5-axis coordinated real-time interpolation is presented to replace the current 5-axis coordinated linear interpolation method defective in low-speed, low-accuracy and enormous numerical control （NC） files in sculptured surface machining. A generation procedure of the NC files with the presented format is introduced and the method to realize the interpolation in an open computer numerical control （CNC） system is developed by ourselves. These illustrated the feasibility of the proposed method and its capability of avoiding all the shortages of 5-axis linear interpolation method.展开更多
文摘The water-conducting network of capillaries in vascular plants has evolved over hundreds of millions of years in order to be able to cope with bubble clogging,a problem which also affects modern microfluidic devices.Decades of anatomical studies have revealed that plants growing in habitats in which the formation of bubbles,or emboli,is likely to be a frequent occurrence often have various forms of geometrical sculpturing on the internal surfaces of the xylem conduits.The possible function of such wall sculpturing has long been the subject of speculation.We have investigated the hypothesis that wall sculpturing is a functional adaptation designed to increase the wettability of the walls of xylem conduits,an effect which could be described as the inverse of the well-known lotus-effect.Our results show that wall sculpturing does enhance wettability.Importantly,theoretical calculations reveal that the geometric parameters of various types of wall sculpturing are such that the resulting surfaces are sufficiently rough to enhance wettability,but not significantly rougher.The results provide an appealing answer to the long-standing debate on the function of wall sculpturing in xylem conduits,and may provide biomimetic clues for new approaches to the removal of bubbles in microfluidic channels.
文摘The achene wail anatomy and surface sculpturing of 14 species representing Lactuca L. and related genera were Investigated to evaluate inter-and Intrageneric relationships. The achene wall anatomy of the studied species can be divided Into two types： winged and ribbed. The winged type is present in Lactuca L., Pterocypsela Shlh, Clcerblta Wallr., Chaetoserls Shlh and Stenoseris Shlh, and is characterized by protruding wings and costae in transverse section. Winged type achene mesocarps are composed of parenchymatous cells and fiber ceils, and the distinct fibrous strands are confined to the costae or wings of the achenes. The ribbed type is present in Notoseris Shih and Paraprenanthes Chang ex Shih, and Is characterized by only having costae In transverse section. Fiber cells are continuous in the costae and intercostae, in surface sculpturing, the ornamentation and the shape of epidermal cells are different among these genera. The results Indicate that L. altalca and L. serrlola should be conspeclfic, and that L. dollchophylla is probably an Intermediate taxon between Lactuca and Chaetoserls. The results also support the separation of Pterocypseia, Paraprenanthes, Notoseris, Chaetoseris and Stenoserls from Lactuca and Clcerblta as independent entitles. Close affinities between Pterocypsela and Lactuca, Paraprenanthes and Notoserls, and Chaetoserls and Stenoserls are also proposed.
文摘1 Thousands of giant panda sculptures greeted residents and tourists starting on December 7,2024,in Hong Kong region,where enthusiasm for the pandas had grown since two cubs were born in a local theme park.2 The 2,500 exhibits were shown at a launch ceremony of PANDA GO!FEST HK,the city's largest panda‑themed exhibition,at Hong Kong's airport on December 2,2024.They were next publicly displayed at the Avenue of Stars in Tsim Sha Tsui,a popular shopping district,before moving to three other locations that month.
文摘Operating under the philosophy that play is a child's right,Anthill Creations,a non‑profit run by Pooja Rai,has so far built 283 different play spaces using almost entirely painted tires,featuring large tire sculptures of cars,buildings or animals,paired with more classic elements of swings,see‑saws and jungle gyms.
文摘Digital sculpture is the product of the cross-integration of art and technology,and its development is accompanied by the two-way interaction between technological innovation and artistic concepts.Based on this,this paper mainly analyzes the remolding of artistic creation logic by technical tools and the expansion of technical application boundary by artistic expression,and further reveals the dynamic balance relationship between the two in symbiosis,hoping to help understand the accompanying mechanism of art and technology in the digital age.
文摘The first thing to know about the Museum of Underwater Art(MOUA)is that it is not a traditional museum housed in a building—it's a series of installations(现代雕塑装置)and sculptures within the Great Barrier Reef Marine Park.
基金National Natural Science Foundation of China (52375412)Fundamental Research Funds for Central Universities (N2203011)China Scholarship Council Program (202306080057)。
文摘On-machine inspection has a significant impact on improving high-precision and efficient machining of sculptured surfaces. Due to the lack of machining information and the inability to adapt the parameters to the dynamic cutting conditions, theoretical modeling of profile inspection usually leads to insufficient adaptation, which causes inaccuracy problems. To address the above issues, a novel coupled model for profile inspection is proposed by combining the theoretical model and the data-driven model. The key process is to first realize local feature extraction based on the acquired vibration signals. The hybrid sampling model, which fuses geometric feature terms and vibration feature terms, is modeled by the lever principle. Then, the weight of each feature term is adaptively assigned by a multi-objective multi-verse optimizer.Finally, an inspection error compensation model based on the attention mechanism considering different probe postures is proposed to reduce the impact of pre-travel and radius errors on inspection accuracy. The anisotropy of the probe system error and its influence mechanism on the inspection accuracy are analyzed quantitatively and qualitatively. Compared with the previous models, the proposed hybrid profile inspection model can significantly improve the accuracy and efficiency of on-machine sampling. The proposed compensation model is able to correct the inspection errors with better accuracy. Simulations and experiments demonstrate the feasibility and validity of the proposed methods. The proposed model and corresponding new findings contribute to high-precision and efficient on-machine inspection, and help to understand the coupling mechanism of inspection errors.
文摘The novel Hypatia:Or New Foes With an Old Face by Charles Kingsley,published in 1853,provided valuable insight into Hypatia’s achievements and the unfortunate circumstances surrounding her untimely demise.Kingsley’s novel portrayed a fiercely intelligent woman,Hypatia,who sparked the interest of many artists,particularly sculptors.They were eager to capture in their statues the personification of this remarkable ancient mathematician,philosopher,and scientist of ancient Egypt,Hypatia of Alexandria(355-415).This essay has two parts.The first provides a brief overview of Hypatia’s life and accomplishments.The second part focuses on four sculptures from the 19th century created by different artists:Hypatia(1873-1876)by the American Howard Roberts,Hypatia(1874)by the Italian Odoardo Tabacchi,Hypatia(1890)by Francis John Williamson,and Hypatia(1894)by Richard Claude Belt.The two latter works are by British sculptors.
文摘This paper explores how sculpture,as a medium,has transcended traditional boundaries and evolved into a diverse form of artistic expression that engages with both physical and social dimensions.Tracing the evolution from traditional materials and techniques to modernist breaks and conceptual art,this study delves into key turning points,including the shift towards abstraction,the role of the readymade,and the influence of site-specificity.It also examines how contemporary sculpture serves as a dynamic platform for addressing social,cultural,and political issues,fostering public engagement and transforming public spaces.By analyzing these developments,this paper highlights sculpture’s growing role as a medium that not only reflects but also shapes societal narratives.
文摘Figurative sculpture and decorative elements belong to the same category of art;the development of sculpture art requires innovation and constant exploration of new development paths,while many characteristics of decorative elements can give the creation of sculpture works a variety of inspiration.This paper explores the significance of figurative sculpture and decorative elements,examining their intrinsic connections and historical practices.The study aims to uncover the potential of figurative sculpture in the creation of decorative elements,highlighting how the integration of these forms can contribute to the development of art and the creation of meaningful figurative sculptures.
文摘In the field of contemporary sculpture creation,the rich culture and historical depth of Chinese ethnic minorities have attracted the widespread attention of artists.These creations not only emphasize external features such as ethnic costumes,totems,or life scenes but also touch deep spiritual contents including historical stories,religious beliefs,and living habits of ethnic minorities.This paper discusses the integration process of Chinese ethnic minority themes in figurative sculpture creation and the inheritance of the profound spirit of ethnic groups in this process.At the same time,this paper also places the diversified expression and innovative practice of these themes in sculpture art in the context of the new era for investigation and explores the far-reaching influence of its development on promoting cultural inheritance and artistic innovation.
基金National Natural Science Foundation of China (50875012)National High-tech Research and Development Program (2008AA04Z124)+1 种基金National Science and Technology Major Project (2009ZX04001-141)Joint Construction Project of Beijing Municipal Commission of Education
文摘The problem of finished surface being not first-order continuous commonly exists in machining sculptured surfaces with a torus cutter and some other types of cutters. To solve this problem, a dual drive curve tool path planning method is proposed in this article. First, the maximum machining strip width of a whole tool path can be obtained through optimizing each tool position with multi-point machining （MPM） method. Second, two drive curves are then determined according to the obtained maximum machining strip width. Finally, the tool is positioned once more along the dual drive curve under the condition of tool path smoothness. A computer simulation and cutting experiments are carried out to testify the performance of the new method. The machined surface is measured with a coordinate measuring machine （CMM） to examine the machining quality. The results obtained show that this method can effectively eliminate sharp scallops between adjacent tool paths, keep tool paths smooth, and improve the surface machining quality as well as machining efficiency.
基金Key Development Program of Science and Technology of Heilongjiang Province, China (GB05A501)
文摘A 5-axis controller with curve interpolation function is developed to satisfy high-speed and high-precision computer numerical control (CNC) machining of machine parts with complex shapes in the authors-devised open CNC system. The instruction for- mat of this interpolation method and the generation procedure of the numerical control (NC) files are introduced. The interpola- tion curves of both position vectors and orientation vectors constructed by the controller are C2 continuous and independent of machin...
基金The Natural Science Foundation of Jiangsu Province(No.BK2003005).
文摘A direct interpolation algorithm for spatial curves on a surface is proposed for pen-cutting of sculptured surfaces. The algorithm can carry out the direct interpolation for projective curves lying on the sculptured surface. It is based on the geometric and kinetic relationships between drive curves and cutter-contact （C-C） curves. It evaluates the parameter of drive curves corresponding to interpolation points by the Taylor formula. Then it gains coordinates of interpolation points indirectly by inverse calculation. Finally, it generates the motion commands for machine tool controller. This method extends the locus-controlled function in the computer numerical control （CNC） system effectively and improves the efficiency for the numerical control （NC） machining of sculptured surfaces. The simulation shows that the proposed algorithm is feasible and practical. This algorithm can also be applied to the machining of the whole surface.
文摘NC machining path of sculptured surfaces in CAD/CAM system plays an important role on manufacture. This paper describes a new algorithm for 5 axis machining of sculptured surfaces and the algorithm is interference free. The approach includes: (1) the tesselation of the parametric surfaces into triangles; (2) building topological relations among triangles;(3) 5 axis tool path generation; (4) interference detection and tool position correction.
文摘Landscape design and sculpture art have gradually integrated into each other, as sculptures are no longer limited in art galleries but adapted to various environments, and gardens are trying to make earth into a great work of art by using sculptures. The interpenetrating and tolerance of sculpture and garden has changed the appearance of environmental landscape, and led to a new era of art and design.
文摘By analyzing the role of public art in the construction and development of urban landscape, the concept of public art and its regional meaning are analyzed, the relation between public art and city sculpture is explained, it is pointed out that city sculpture could enhance the landscape of urban space and enrich public art. The functions of city sculpture are expounded in details, including guiding spatial communication, creating the sociality of humanistic environment, and communicating space with human. With the design of city sculpture at the entrance of Xiasi County in Southeast part of Guizhou Province for example, its location and status are analyzed, highlighting its special location advantages as well as the historical business climate, the sculpture integrates the ancient corn which represents commercial culture with butterfly which embodies the totem of Miao nationalities in Southeast Guizhou Province, therefore brings both the visual impact and culture features. Here the significance of regional city sculpture is summarized, it is emphasized that the city sculpture is the material carrier of city culture, the cultural source of original design elements and the concrete manifestation of regional spirit.
文摘Rochlitz porphyry tuff(“Rochlitzer Porphyrtuff”),a slightly welded ignimbrite from the North Saxon Volcanic Complex–a Permian supervolcano in East Germany–was used for millstones already in Neolithic age.The first use as building and sculpturing stone dates back to the early 12^(th) century,when quarries at the Rochlitz Mountain(“Rochlitzer Berg”)provided stone blocks for ashlars,sculptures and other purposes in the region between Leipzig and Chemnitz.In the first half of the 20th century,the material was used for buildings in many other German cities,like Berlin,Dresden,Frankfurt,Hamburg,and Munich.Moreover,it was applied in Kaliningrad(Russia),Vienna(Austria)as well as in some places in the Czech Republic,Poland and Denmark.The stone is presented with its petrographic and technical properties.Furthermore,the use in ancient and modern buildings,the quarrying techniques and heritage issues are discussed.The old quarry area of the Rochlitz Mountain is part of the German National Geopark“Porphyrland”,and two quarries are still producing stone for construction and restoration purposes as well as for sculptures.
文摘By making use of the advantages of non-uniform rational B-spline （NURBS） curves to represent spatial curves, an instruction format with double NURBS curves suitable for 5-axis coordinated real-time interpolation is presented to replace the current 5-axis coordinated linear interpolation method defective in low-speed, low-accuracy and enormous numerical control （NC） files in sculptured surface machining. A generation procedure of the NC files with the presented format is introduced and the method to realize the interpolation in an open computer numerical control （CNC） system is developed by ourselves. These illustrated the feasibility of the proposed method and its capability of avoiding all the shortages of 5-axis linear interpolation method.
