Imperial city and outer city are the most important differentiation of the spatial structure of ancient Chinese capitals.The relationship between city and Guo changed from the original spatial structure mode of "...Imperial city and outer city are the most important differentiation of the spatial structure of ancient Chinese capitals.The relationship between city and Guo changed from the original spatial structure mode of "respecting the west" and "sitting in the west and facing the east" to the spatial structure mode of "sitting in the north and facing the south" and the three outer cities in the east,south and west surrounding the imperial city after the Wei,Jin,Southern and Northern Dynasties,and gradually changed from the original "multi palace" system to the "single palace" system.Finally,a "heavy city" capital spatial structure with the outer city around the imperial city and the imperial city around the palace city,and the central axis of the chessboard format was formed.During the Tang and Song Dynasties,it was a period of great change in the history of feudal society in China.Through the investigation of the evolution characteristics of the spatial form of capital cities in the Tang and Song Dynasties,the track of the transformation of social ideology,political system,economic structure and many other fields in the Tang and Song Dynasties was made clear.展开更多
Based on the epistemology and methodology of organizational routine evolution, this paper presents a systematic analysis on how ultimate shareholders control listed companies by means of equity control chain in a pyra...Based on the epistemology and methodology of organizational routine evolution, this paper presents a systematic analysis on how ultimate shareholders control listed companies by means of equity control chain in a pyramid structure and social capital control chain hidden in social networks. First, this paper examines the internal logic of ultimate shareholders' double control chain and designs an iterative model for dynamic evolution intent proceeding from ultimate shareholders 'degree of intent for social capital control. Finally, with the case study of Inner Mongolia Caoyuan Xingfa Co., Ltd., this paper reveals the process and mechanism of ultimate shareholders' creation of double control chain.展开更多
High-quality development of marine fisheries provides an important advantage for China to build itself into a maritime power and implement the Blue Granary Plan effectively.Based on the concepts of‘new development’,...High-quality development of marine fisheries provides an important advantage for China to build itself into a maritime power and implement the Blue Granary Plan effectively.Based on the concepts of‘new development’,‘food security’,and the six dimensions of‘openness,innovation,coordination,green,sharing,and security’,in this study,we established an evaluation index system for the high-quality development of China’s marine fishery sector.We applied the entropy method to evaluate the high-quality development level of China’s marine fishery sector from 2000 to 2016 and explored its spatial and temporal evolution rules.Our results indicated that:1)from 2000 to 2016,China’s marine fishery sector was in the primary stage of high-quality development;2)spatially,the highquality development of marine fisheries showed an upward trend in all provinces,autonomous regions,and municipalities in the country(not including Hong Kong,Macao and Taiwan of China),and with time,the distribution pattern changed from single to multi-polarization;3)temporally,the development level of high-quality marine fisheries fluctuated during the study period.From 2000 to 2010,the growth rate in openness was relatively slow,but after 2010,it increased rapidly.Notably,innovation is the driving force for high-quality development.The green and security factors provide a solid guarantee for high-quality development.In the high-quality development of a region,economic development is better coordinated,and the distribution of benefits is more inclusive.This study provides a theoretical basis to formulate effective marine fishery policies for the high-quality development of the marine fishery sector in China.Exploring the high-quality development and evolution process of marine fishery is conducive to promoting the sustainable development of marine fishery industry,ensuring marine fishery food security,and alleviating global food crisis.展开更多
When correcting a fault, adding a new concept or feature, or adapting a system to conform to a new platform, software engineers must first find the relevant parts of the code that correspond to a particular change. Th...When correcting a fault, adding a new concept or feature, or adapting a system to conform to a new platform, software engineers must first find the relevant parts of the code that correspond to a particular change. This is termed as concept or feature location process. Several techniques have been introduced which automate some or all of the process of concept location. Those techniques rely heavily on code comprehension as it is considered a prerequisite when attempting to maintain any software system. It provides a comprehensive overview of large body work which is beneficial to researchers and practitioners. This paper presents an overview of code comprehension categorization and consequence. A systematic literature survey of concept location enhancement techniques is also presented. Moreover, the paper presents an overview of the role of concept location in program comprehension and maintenance and discusses information retrieval techniques to advance concept location.展开更多
The historical cities in Southeast Asia with distinct characteristics are an important part of Asia’s cultural heritage system and the ancient capitals of Myanmar are as an example of these civilizational achievement...The historical cities in Southeast Asia with distinct characteristics are an important part of Asia’s cultural heritage system and the ancient capitals of Myanmar are as an example of these civilizational achievements.Their urban forms through history are essential spatial carriers reflecting the traditional local planning thinking.However,the overall understanding has yet to form due to a lack of systematic research.This study aims to complement it by studying the urban forms of almost all Myanmar’s ancient capitals based on verifiable spatial elements,works of literature,archaeology documents and field survey.The location,boundary and layout elements are analyzed to classify and characterize these urban forms,and their evolution rules are then summarized.Furthermore,the urban planning characteristics are discussed,indicating that the regulated structure and distinctive image gradually formed,accompanied by increasingly mature planning thinking and methods.The study reveals that the urban form and the planning thinking of Myanmar’s ancient capital cities had undergone an evolution with its own characteristics and that the“Golden Royal City”is of unique value in the genealogy of Asian capitals.The findings will contribute to the mutual learning between civilizations and provide a scientific foundation for the heritage conservation.展开更多
Until now the genus Amana(Liliaceae),known as ’East Asian tulips’,has contained just seven species.In this study,a phylogenomic and integrative taxonomic approach was used to reveal two new species,Amana nanyueensis...Until now the genus Amana(Liliaceae),known as ’East Asian tulips’,has contained just seven species.In this study,a phylogenomic and integrative taxonomic approach was used to reveal two new species,Amana nanyueensis from Central China and A.tianmuensis from East China.A.nanyueensis resembles Amana edulis in possessing a densely villous-woolly bulb tunic and two opposite bracts,but differs in its leaves and anthers.Amana tianmuensis resembles Amana erythronioides in possessing three verticillate bracts and yellow anthers,but differs in aspects of its leaves and bulbs.These four species are clearly separated from each other in principal components analysis based on morphology.Phylogenomic analyses based on plastid CDS further support the species delimitation of A.nanyueensis and A.tianmuensis and suggests they are closely related to A.edulis.Cytological analysis shows that A.nanyueensis and A tianmuensis are both diploid(2n=2x=24),different from A edulis,which is either diploid(northern populations) or tetraploid(southern populations,2n=4x=48).The pollen morphology of A.nanyueensis is similar to other Amana species(single-groove germination aperture),but A.tianmuensis is quite different because of the presence of a sulcus membrane,which creates the illusion of double grooves.Ecological niche modelling also revealed a niche differentiation between A.edulis,A.nanyueensis and A.tianmuensis.展开更多
Microalloyed linepipe steels were first introduced in 1959 at strength levels around 52-60 ksi [1] [2].The steels were generally strengthened by niobium or vanadium used singly.As strengths levels increased to X-70 in...Microalloyed linepipe steels were first introduced in 1959 at strength levels around 52-60 ksi [1] [2].The steels were generally strengthened by niobium or vanadium used singly.As strengths levels increased to X-70 in the early 1970’s niobium and vanadium were used in combination and controlled rolling was introduced on a broad basis.Higher strengths decrease tolerance for impurities and non-metallic inclusions which required improved steelmaking practices.Sulfur,carbon,and nitrogen were reduced and continuous casting was increasingly applied which required improved ladle refining and deoxidation practices.Niobium-molybdenum steels were introduced by IPSCO in 1972 [3] and by Italsider in 1974 [4].Steels with higher niobium contents were also introduced in the early 1970’s but available steelmaking technologies limited the use of optimum niobium to carbon ratios,i.e.those approaching stoichiometry.Nevertheless the steels benefited from the effect of niobium in retarding austenite recrystallization at relatively high rolling temperatures and they developed attractive combinations of strength and toughness in old manufacturing facilities using simple (relaxed) rolling schedules.Fluctuations in the price of molybdenum and vanadium in the past decade and expanded application of API Grade X-80 linepipe,have led to more widespread use of niobium contents up to 0.11 percent,in combination with 0.02-0.03 percent carbon (near stoichiometry) thus maximizing the effects of solute niobium during rolling,in lowering transformation temperature,and thereby reducing reliance on other alloying,often expensive,elements.The history of these developments will be presented and applications of the concept will be summarized.展开更多
Research on the evolution of cultural policy is the key in the field of public policy study,and it is also an important means to solve the problems that have emerged in cultural heritage management.The National Cultur...Research on the evolution of cultural policy is the key in the field of public policy study,and it is also an important means to solve the problems that have emerged in cultural heritage management.The National Cultural Park is an innovative cultural heritage protection system proposed by Chinese leaders within the context of national rejuvenation and building a culturally-strong country campaign.From the perspective of system evolution theory,this paper systematically sorts out the ideas behind international heritage management and the evolutionary process of the Cultural Relics Protection Unit system,in an effort to explore the origin,innovation and vision of the National Cultural Park System.A review of the international heritage documents revealed that the principle of heritage protection has developed from“authenticity”to“integrity”,and the focus of the protection object has also changed from“monism”to“diversity”,which provided a theoretical background for the burgeoning National Cultural Park.The Cultural Relics Protection Unit system has been promoted as the most crucial cultural heritage management system in China.Therefore,this study sheds light on the evolution and limitations of the system that lays a practical foundation for the National Cultural Park System.There have been three stages in the history of China’s National Cultural Relics Protection Unit,namely,the creation of the system(1956–1965),the survival crisis of the system(1966–1977),and the rebirth and development of the system(1978 to the present),in which the main driving concepts of China's cultural heritage management have been sequentially elucidated as simple protectionism,tolerant conservatism and comprehensive developmentalism,respectively.Since the establishment of China’s Cultural Relics Protection Unit system,tremendous progress has been made not only in the enlightenment of the public’s mindset and but also in the development of system and culture.However,the changes in the institutional environment gradually exposed its limitations regarding cultural relic management and value expression.The National Cultural Park System is the fruit created by the internal contradictions of the cultural heritage system itself and the evolution of heritage theory.Its biggest innovation lies in the two core connotations of“integrated protection”and“integrated development”.In the future,as the National Cultural Park management system matures,a Chinese cultural heritage management system will take shape in which the National Cultural Parks become dominant and various cultural resources are utilized.Finally,the National Cultural Park will become a symbol of Chinese culture and will be internalized into the common belief system of the Chinese nation.展开更多
We present a molecular phylogenetic study of the lichen genus Sticta focusing on Colombia,using the ITS fungal barcoding gene for a total of 370 ingroup OTUs,with 322 newly generated sequences.The topology resulting f...We present a molecular phylogenetic study of the lichen genus Sticta focusing on Colombia,using the ITS fungal barcoding gene for a total of 370 ingroup OTUs,with 322 newly generated sequences.The topology resulting from a maximum likelihood approach does not support current species concepts in Sticta,which use a morphological concept,but in contrast shows that similar morphodemes evolved multiple times independently within the genus.As a consequence,currently applied names such as S.fuliginosa and S.weigelii comprise numerous(up to more than 20)unrelated species-level lineages,which can be distinguished also phenotypically using previously unrecognized characters such as lobe configuration,lobe surface structure,tomentum type,and anatomy of the basal membrane of the cyphellae.We conclude that the genus Sticta contains about four to five times the number of species currently recognized.In Colombia alone,approximately 150 species of Sticta are present.展开更多
Translation is a complicated thinking and a practicing process,which involves many theories and skills.According to the theory of dynamic equivalence and based on literature studies as well as personal practical exper...Translation is a complicated thinking and a practicing process,which involves many theories and skills.According to the theory of dynamic equivalence and based on literature studies as well as personal practical experiences,three viewpoints have been proposed in this article to discuss on how to translate a newly-introduced concept;namely,giving full consideration to the meaning of newly-introduced concepts,paying attention to the evolution of the concepts,and seeking for a similar meaning in the traditional classics of a nation,each of which is exemplified in order to facilitate understanding.展开更多
The policy adjustments have undergone a few stages:allowing capital controls,advocating capital flow liberalization,allowing temporary capital controls in times of crisis,recognizing post-inflow surge management and r...The policy adjustments have undergone a few stages:allowing capital controls,advocating capital flow liberalization,allowing temporary capital controls in times of crisis,recognizing post-inflow surge management and recommending preemptive capital inflow management.展开更多
文摘Imperial city and outer city are the most important differentiation of the spatial structure of ancient Chinese capitals.The relationship between city and Guo changed from the original spatial structure mode of "respecting the west" and "sitting in the west and facing the east" to the spatial structure mode of "sitting in the north and facing the south" and the three outer cities in the east,south and west surrounding the imperial city after the Wei,Jin,Southern and Northern Dynasties,and gradually changed from the original "multi palace" system to the "single palace" system.Finally,a "heavy city" capital spatial structure with the outer city around the imperial city and the imperial city around the palace city,and the central axis of the chessboard format was formed.During the Tang and Song Dynasties,it was a period of great change in the history of feudal society in China.Through the investigation of the evolution characteristics of the spatial form of capital cities in the Tang and Song Dynasties,the track of the transformation of social ideology,political system,economic structure and many other fields in the Tang and Song Dynasties was made clear.
基金Phased results of fund project: "Study on the Ultimate Shareholder's Control and Deprivation in Listed Companies from the Perspective of Social Capital," sponsored by National Natural Science Foundation of China (Grant No. 71072072) "Study on Ultimate Control Rights of China's Listed Companies from the Perspective of Social Capital," sponsored by Graduate Innovation Fund of Capital University of Economics and Business (Grant No.CUEB2010507).
文摘Based on the epistemology and methodology of organizational routine evolution, this paper presents a systematic analysis on how ultimate shareholders control listed companies by means of equity control chain in a pyramid structure and social capital control chain hidden in social networks. First, this paper examines the internal logic of ultimate shareholders' double control chain and designs an iterative model for dynamic evolution intent proceeding from ultimate shareholders 'degree of intent for social capital control. Finally, with the case study of Inner Mongolia Caoyuan Xingfa Co., Ltd., this paper reveals the process and mechanism of ultimate shareholders' creation of double control chain.
基金Under the auspices of the National Natural Science Foundation of China(No.41976207,42076222,42071159)。
文摘High-quality development of marine fisheries provides an important advantage for China to build itself into a maritime power and implement the Blue Granary Plan effectively.Based on the concepts of‘new development’,‘food security’,and the six dimensions of‘openness,innovation,coordination,green,sharing,and security’,in this study,we established an evaluation index system for the high-quality development of China’s marine fishery sector.We applied the entropy method to evaluate the high-quality development level of China’s marine fishery sector from 2000 to 2016 and explored its spatial and temporal evolution rules.Our results indicated that:1)from 2000 to 2016,China’s marine fishery sector was in the primary stage of high-quality development;2)spatially,the highquality development of marine fisheries showed an upward trend in all provinces,autonomous regions,and municipalities in the country(not including Hong Kong,Macao and Taiwan of China),and with time,the distribution pattern changed from single to multi-polarization;3)temporally,the development level of high-quality marine fisheries fluctuated during the study period.From 2000 to 2010,the growth rate in openness was relatively slow,but after 2010,it increased rapidly.Notably,innovation is the driving force for high-quality development.The green and security factors provide a solid guarantee for high-quality development.In the high-quality development of a region,economic development is better coordinated,and the distribution of benefits is more inclusive.This study provides a theoretical basis to formulate effective marine fishery policies for the high-quality development of the marine fishery sector in China.Exploring the high-quality development and evolution process of marine fishery is conducive to promoting the sustainable development of marine fishery industry,ensuring marine fishery food security,and alleviating global food crisis.
文摘When correcting a fault, adding a new concept or feature, or adapting a system to conform to a new platform, software engineers must first find the relevant parts of the code that correspond to a particular change. This is termed as concept or feature location process. Several techniques have been introduced which automate some or all of the process of concept location. Those techniques rely heavily on code comprehension as it is considered a prerequisite when attempting to maintain any software system. It provides a comprehensive overview of large body work which is beneficial to researchers and practitioners. This paper presents an overview of code comprehension categorization and consequence. A systematic literature survey of concept location enhancement techniques is also presented. Moreover, the paper presents an overview of the role of concept location in program comprehension and maintenance and discusses information retrieval techniques to advance concept location.
基金the support of the National Natural Science Foundation of China(Grant Number 52078116)“Research on morphological characteristics,type spectrum and heritage value of historical capitals in Indochina based on multi-source remote sensing data”.
文摘The historical cities in Southeast Asia with distinct characteristics are an important part of Asia’s cultural heritage system and the ancient capitals of Myanmar are as an example of these civilizational achievements.Their urban forms through history are essential spatial carriers reflecting the traditional local planning thinking.However,the overall understanding has yet to form due to a lack of systematic research.This study aims to complement it by studying the urban forms of almost all Myanmar’s ancient capitals based on verifiable spatial elements,works of literature,archaeology documents and field survey.The location,boundary and layout elements are analyzed to classify and characterize these urban forms,and their evolution rules are then summarized.Furthermore,the urban planning characteristics are discussed,indicating that the regulated structure and distinctive image gradually formed,accompanied by increasingly mature planning thinking and methods.The study reveals that the urban form and the planning thinking of Myanmar’s ancient capital cities had undergone an evolution with its own characteristics and that the“Golden Royal City”is of unique value in the genealogy of Asian capitals.The findings will contribute to the mutual learning between civilizations and provide a scientific foundation for the heritage conservation.
基金supported by the National Natural Science Foundation of China (Grant No.31970225)the Zhejiang Provincial Natural Science Foundation (Grant No.LY19C030007)theNSFC-NSF Dimensions of Biodiversity Program (Grant No.31461123001)。
文摘Until now the genus Amana(Liliaceae),known as ’East Asian tulips’,has contained just seven species.In this study,a phylogenomic and integrative taxonomic approach was used to reveal two new species,Amana nanyueensis from Central China and A.tianmuensis from East China.A.nanyueensis resembles Amana edulis in possessing a densely villous-woolly bulb tunic and two opposite bracts,but differs in its leaves and anthers.Amana tianmuensis resembles Amana erythronioides in possessing three verticillate bracts and yellow anthers,but differs in aspects of its leaves and bulbs.These four species are clearly separated from each other in principal components analysis based on morphology.Phylogenomic analyses based on plastid CDS further support the species delimitation of A.nanyueensis and A.tianmuensis and suggests they are closely related to A.edulis.Cytological analysis shows that A.nanyueensis and A tianmuensis are both diploid(2n=2x=24),different from A edulis,which is either diploid(northern populations) or tetraploid(southern populations,2n=4x=48).The pollen morphology of A.nanyueensis is similar to other Amana species(single-groove germination aperture),but A.tianmuensis is quite different because of the presence of a sulcus membrane,which creates the illusion of double grooves.Ecological niche modelling also revealed a niche differentiation between A.edulis,A.nanyueensis and A.tianmuensis.
文摘Microalloyed linepipe steels were first introduced in 1959 at strength levels around 52-60 ksi [1] [2].The steels were generally strengthened by niobium or vanadium used singly.As strengths levels increased to X-70 in the early 1970’s niobium and vanadium were used in combination and controlled rolling was introduced on a broad basis.Higher strengths decrease tolerance for impurities and non-metallic inclusions which required improved steelmaking practices.Sulfur,carbon,and nitrogen were reduced and continuous casting was increasingly applied which required improved ladle refining and deoxidation practices.Niobium-molybdenum steels were introduced by IPSCO in 1972 [3] and by Italsider in 1974 [4].Steels with higher niobium contents were also introduced in the early 1970’s but available steelmaking technologies limited the use of optimum niobium to carbon ratios,i.e.those approaching stoichiometry.Nevertheless the steels benefited from the effect of niobium in retarding austenite recrystallization at relatively high rolling temperatures and they developed attractive combinations of strength and toughness in old manufacturing facilities using simple (relaxed) rolling schedules.Fluctuations in the price of molybdenum and vanadium in the past decade and expanded application of API Grade X-80 linepipe,have led to more widespread use of niobium contents up to 0.11 percent,in combination with 0.02-0.03 percent carbon (near stoichiometry) thus maximizing the effects of solute niobium during rolling,in lowering transformation temperature,and thereby reducing reliance on other alloying,often expensive,elements.The history of these developments will be presented and applications of the concept will be summarized.
基金The China National Social Science Fund of Art Sciences(20ZD02).
文摘Research on the evolution of cultural policy is the key in the field of public policy study,and it is also an important means to solve the problems that have emerged in cultural heritage management.The National Cultural Park is an innovative cultural heritage protection system proposed by Chinese leaders within the context of national rejuvenation and building a culturally-strong country campaign.From the perspective of system evolution theory,this paper systematically sorts out the ideas behind international heritage management and the evolutionary process of the Cultural Relics Protection Unit system,in an effort to explore the origin,innovation and vision of the National Cultural Park System.A review of the international heritage documents revealed that the principle of heritage protection has developed from“authenticity”to“integrity”,and the focus of the protection object has also changed from“monism”to“diversity”,which provided a theoretical background for the burgeoning National Cultural Park.The Cultural Relics Protection Unit system has been promoted as the most crucial cultural heritage management system in China.Therefore,this study sheds light on the evolution and limitations of the system that lays a practical foundation for the National Cultural Park System.There have been three stages in the history of China’s National Cultural Relics Protection Unit,namely,the creation of the system(1956–1965),the survival crisis of the system(1966–1977),and the rebirth and development of the system(1978 to the present),in which the main driving concepts of China's cultural heritage management have been sequentially elucidated as simple protectionism,tolerant conservatism and comprehensive developmentalism,respectively.Since the establishment of China’s Cultural Relics Protection Unit system,tremendous progress has been made not only in the enlightenment of the public’s mindset and but also in the development of system and culture.However,the changes in the institutional environment gradually exposed its limitations regarding cultural relic management and value expression.The National Cultural Park System is the fruit created by the internal contradictions of the cultural heritage system itself and the evolution of heritage theory.Its biggest innovation lies in the two core connotations of“integrated protection”and“integrated development”.In the future,as the National Cultural Park management system matures,a Chinese cultural heritage management system will take shape in which the National Cultural Parks become dominant and various cultural resources are utilized.Finally,the National Cultural Park will become a symbol of Chinese culture and will be internalized into the common belief system of the Chinese nation.
基金The field work and the molecular studies were partially supported by a grant from the National Science Foundation:Neotropical Epiphytic Microlichens-An Innovative Inventory of a Highly Diverse yet Little Known Group of Symbiotic Organisms(DEB 715660 to The Field Museum,PI R.Lücking)by funds from the Caterpillar®company and Field Museum donor Robert H.Gordon.
文摘We present a molecular phylogenetic study of the lichen genus Sticta focusing on Colombia,using the ITS fungal barcoding gene for a total of 370 ingroup OTUs,with 322 newly generated sequences.The topology resulting from a maximum likelihood approach does not support current species concepts in Sticta,which use a morphological concept,but in contrast shows that similar morphodemes evolved multiple times independently within the genus.As a consequence,currently applied names such as S.fuliginosa and S.weigelii comprise numerous(up to more than 20)unrelated species-level lineages,which can be distinguished also phenotypically using previously unrecognized characters such as lobe configuration,lobe surface structure,tomentum type,and anatomy of the basal membrane of the cyphellae.We conclude that the genus Sticta contains about four to five times the number of species currently recognized.In Colombia alone,approximately 150 species of Sticta are present.
文摘Translation is a complicated thinking and a practicing process,which involves many theories and skills.According to the theory of dynamic equivalence and based on literature studies as well as personal practical experiences,three viewpoints have been proposed in this article to discuss on how to translate a newly-introduced concept;namely,giving full consideration to the meaning of newly-introduced concepts,paying attention to the evolution of the concepts,and seeking for a similar meaning in the traditional classics of a nation,each of which is exemplified in order to facilitate understanding.
文摘The policy adjustments have undergone a few stages:allowing capital controls,advocating capital flow liberalization,allowing temporary capital controls in times of crisis,recognizing post-inflow surge management and recommending preemptive capital inflow management.