Adobe After Effects软件中经常用到的特效合成插件有Particular、E3D、Form、Plexus等,这些插件各自配备了一套独立的粒子系统。当它们处于同一个合成中时,粒子之间并不会自然融合在一起,而是根据上下图层的关系进行相互遮挡。本文深...Adobe After Effects软件中经常用到的特效合成插件有Particular、E3D、Form、Plexus等,这些插件各自配备了一套独立的粒子系统。当它们处于同一个合成中时,粒子之间并不会自然融合在一起,而是根据上下图层的关系进行相互遮挡。本文深入探讨了不同粒子插件之间相互穿插与遮挡的实现方式,并结合实例阐述制作过程,模拟出两种粒子在同一合成空间中交互融合的逼真效果。展开更多
BACKGROUND Physical inactivity is a significant yet underappreciated risk factor for cardiovascular disease(CVD),particularly among older adults.The aim of this study was to analyze the global burden of CVD attributab...BACKGROUND Physical inactivity is a significant yet underappreciated risk factor for cardiovascular disease(CVD),particularly among older adults.The aim of this study was to analyze the global burden of CVD attributable to physical inactivity in individuals aged 70 years and older from 1990 to 2021 using the Global Burden of Disease data.METHODS We assessed trends in disability-adjusted life years(DALYs)and deaths,decomposed changes into population growth,aging,and epidemiological factors,and examined health inequalities across sociodemographic index(SDI)regions.RESULTS From 1990 to 2021,a substantial rise in DALYs was observed,especially in low and middle SDI regions,with a 120.06% increase in the low SDI region,but a 23.10% decline in the high SDI region.Decomposition analysis identified population aging and growth as primary drivers for the burden,contributing 66.39% and 83.56% to the increase in middle and low SDI regions,respectively.By contrast,epidemiological improvements alleviated burden in the high SDI region(54.91%).Gender disparities persisted,with women experiencing a higher burden.Inequality analysis indicated a shift in CVD burden towards the low SDI region,with declining concentration indices for DALYs(-0.03 to-0.13)and deaths(-0.07 to-0.15).The Bayesian age-period-cohort projections suggest continued increases in DALYs and deaths through 2050,with women disproportionately affected.CONCLUSIONS These findings highlight the urgent need for targeted interventions promoting physical activity,improving healthcare access,and implementing region-specific prevention strategies.展开更多
We are pleased to announce the special topic of“AI for Polymers”published in the Chinese Journal of Polymer Science (CJPS).In recent years,the advancements in artificial intelligence (AI) techniques,including machin...We are pleased to announce the special topic of“AI for Polymers”published in the Chinese Journal of Polymer Science (CJPS).In recent years,the advancements in artificial intelligence (AI) techniques,including machine learning(particularly deep learning) and data-driven modeling,are reshaping how we design,synthesize and characterize polymers.In particular,a strong and lively research community in the development and application of AI techniques to polymer science has emerged in China,making great contributions to this important area of research in polymer science.With the growing interest in the application of AI to polymer science,we believe it is the right time to organize a special topic showcasing the activities and achievements of this community.展开更多
The rapid advancements in Artificial Intelligence(AI),particularly the emergence of large language models(LLMs)such as ChatGPT and DeepSeek,have brought transformative changes to the entire scientific research ecosyst...The rapid advancements in Artificial Intelligence(AI),particularly the emergence of large language models(LLMs)such as ChatGPT and DeepSeek,have brought transformative changes to the entire scientific research ecosystem.As evidenced by the science map of more than 10,000 papers mentioning ChatGPT(see Figure 1),nearly every field of research is actively engaging with and discussing the implications of these technologies.展开更多
Traditional Medicine(TM),particularly Traditional Chinese Medicine(TCM),is an indispensable component of the global healthcare system,offering unique insights to modern medical science.Clinical efficacy is the bedrock...Traditional Medicine(TM),particularly Traditional Chinese Medicine(TCM),is an indispensable component of the global healthcare system,offering unique insights to modern medical science.Clinical efficacy is the bedrock for the inheritance and development of TM.To meet the growing demand for high-quality healthcare,it is imperative to integrate TM with modern technology to address the issue of insufficient evidence for the efficacy of TM.展开更多
Flowers or inflorescences often deploy various signals, including visual, olfactory, and gustatory cues,that can be detected by their pollinators. In many plants,these cues and their functions are poorly understood.De...Flowers or inflorescences often deploy various signals, including visual, olfactory, and gustatory cues,that can be detected by their pollinators. In many plants,these cues and their functions are poorly understood.Deciphering the interactions between floral cues and pollinators is crucial for analyzing the reproductive success of flowering plants. In this study, we examined the composition of the fetid floral scents produced by several Stemona species, including nine S. tuberosa populations from across China, using dynamic headspace adsorption, gas chromatography, and mass spectrometry techniques. We compared variations in floral phenotype,including floral longevity, nectar rewards, pollinator behavior, and flower length and color among the Stemona species. Of the 54 scent compounds identified,the major compounds include fetid dimethyl disulfide,dimethyl trisulfide, 1-pyrroline, butyric acid, p-cresol,isoamyl alcohol, and indole. We detected striking differentiation in floral scent at both the species and population level, and even within a population of plants with different colored flowers. Floral characteristics related to sapromyophily and deceptive pollination,including flower color mimicking livor mortis and a lack of nectar, were found in five Stemona species, indicating that Stemona is a typical sapromyophilous taxon. Species of this monocot genus might employ evolutionary tactics to exploit saprophilous flies for pollination.展开更多
Using films by Patricia Rozema and Igmar Bergman,“Lowering Human Hubris into the Sublime”reminds the reader that the particular in our lives is where the sublime performs.While we multitask and take for granted the ...Using films by Patricia Rozema and Igmar Bergman,“Lowering Human Hubris into the Sublime”reminds the reader that the particular in our lives is where the sublime performs.While we multitask and take for granted the world around us that supports our mythic assumptions,the particular objects and lives are actively present.In the two movies,the particular functions as a source of the sublime reminder and source of metaphor for stability and atrophy in everyday living.In one film an artist focuses the ordinary objects in everyday life while being disregarded by artists involved in the abstract.In the second film the particular behind the scenes works quietly to dismantle cultural beliefs for the people living the soon to be dated beliefs where opportunities for more inclusive community reside.展开更多
Aerosol acidity(pH)plays an important role in the multiphase chemical processes of atmospheric particles.In this study,we demonstrated the seasonal trends of aerosol pH calculated with the ISORROPIA-II model in a coas...Aerosol acidity(pH)plays an important role in the multiphase chemical processes of atmospheric particles.In this study,we demonstrated the seasonal trends of aerosol pH calculated with the ISORROPIA-II model in a coastal city of southeast China.We performed quantitative analysis on the various influencing factors on aerosol pH,and explored the responses of aerosol pH to different PM_(2.5)and O_(3)pollution levels.The results showed that the average aerosol pH was 2.92±0.61,following the order of winter>spring>summer>autumn.Sensitivity tests revealed that SO_(4)^(2−),NH_(x),T and RH triggered the variations of aerosol pH.Quantitative analysis results showed that T(37.9%-51.2%)was the main factors affecting pH variations in four seasons,followed by SO_(4)^(2−)(6.1%-23.7%),NH_(x)(7.2%-22.2%)and RH(0–14.2%).Totally,annual mean meteorological factors(52.9%)and chemical compositions(41.3%)commonly contributed the aerosolpH in the coastal city.The concentrations of PM_(2.5)was positively correlated with aerosol liquid water content(R^(2)=0.53)and aerosol pH(R^(2)=0.26),indicating that the increase in pH was related with the elevated NH_(4)NO_(3)and decreased SO_(4)^(2−),and also the changes of T and RH.The O_(x)(O_(3)+NO_(2))was moderately correlated with aerosol pH(R^(2)=-0.48),attributable to the fact that the proportion of SO_(4)^(2−)increased under high T and low RH conditions.The study strengthened our understanding of the contributions of influencing factors to aerosol pH,and also provided scientific evidences for chemical processes of atmospheric particles in coastal areas.展开更多
In this paper,the method of polynomial particular solutions is used to solve nonlinear Poisson-type partial differential equations in one,two,and three dimensions.The condition number of the coefficient matrix is redu...In this paper,the method of polynomial particular solutions is used to solve nonlinear Poisson-type partial differential equations in one,two,and three dimensions.The condition number of the coefficient matrix is reduced through the implementation of multiple scale technique,ultimately yielding a stable numerical solution.The methodological process can be divided into two main parts:first,identifying the corresponding polynomial particular solutions for the linear differential operator terms in the governing equations,and second,employing these polynomial particular solutions as basis function to iteratively solve the remaining nonlinear terms within the governing equations.Additionally,we investigate the potential improvement in numerical accuracy for equations with singularities in the analytical solution by shifting the computational domain a certain distance.Numerical experiments are conducted to assess both the accuracy and stability of the proposed method.A comparison of the obtained results with those produced by other numerical methods demonstrates the accuracy,stability,and efficiency of the proposed method in handling nonlinear Poisson-type partial differential equations.展开更多
随着影视制作技术的快速发展,一部部令人耳目一新、制作精良的影视剧持续推出,留给观众深刻印象的不仅有引人入胜的剧情画面表达,也有细致精美的片头片尾及细节文字的画面包装,如个性的字幕设计或者唯美的片头片尾包装等。本文将介绍如...随着影视制作技术的快速发展,一部部令人耳目一新、制作精良的影视剧持续推出,留给观众深刻印象的不仅有引人入胜的剧情画面表达,也有细致精美的片头片尾及细节文字的画面包装,如个性的字幕设计或者唯美的片头片尾包装等。本文将介绍如何运用After Effects CC 2018的Particular插件制作唯美粒子发散特效,达到提升影视中的图片包装效果。展开更多
The international journal Sciences in Cold and Arid Regions,is devoted to publishing the latest research achievements in processes and the patterns of the Earth surface system in cold and arid regions.Research in cold...The international journal Sciences in Cold and Arid Regions,is devoted to publishing the latest research achievements in processes and the patterns of the Earth surface system in cold and arid regions.Research in cold regions emphasize particularly on the cold-region-characterized physical,chemical and biological processes and their interactions,and on the response of cryosphere to global change and human activities as well as their effects on environment and the acclimatizable strategies.展开更多
From the perspective of the poverty of stimulus argument and the cognitive development theory, this paper attempts to reveal the mechanism of language acquisition. The poverty of stimulus argument theoretically proves...From the perspective of the poverty of stimulus argument and the cognitive development theory, this paper attempts to reveal the mechanism of language acquisition. The poverty of stimulus argument theoretically proves the hypothesis that based on their finite linguistic experience, children can construct their complete language knowledge system. Language acquisition is the process of acquisition of core grammar and of mental representation of vocabulary. Parameter values must be set in the process of children＇s core grammar acquisition. Vocabulary of natural language is stored and processed in the form of conceptual representation, which is associated with syntactic structures by projection rules and bounded by various well-formed rules. The cognitive development theory claims that language acquisition is a development process of universal grammar into particular grammar, which is redescribed at a higher level.展开更多
It is well known that Earth history is punctuated by events during which large volumes of mafic magmas were generated and emplaced by processes unrelated to“normal”sea-floor spreading and subduction.These are recogn...It is well known that Earth history is punctuated by events during which large volumes of mafic magmas were generated and emplaced by processes unrelated to“normal”sea-floor spreading and subduction.These are recognized as Large Igneous Provinces.Systematic Study of dykes helps to understand and solve many geological problems.It helps to recognize Large Igneous Provinces(LIPs),particularly for the Precambrian period.Many LIPs can be linked to regional-scale uplift,continental rifting and breakup,and climatic shifts.展开更多
Adobe After Effects因其可以高效且精确地创建无数种引人注目的动态图形和震撼人心的视觉效果在影视后期合成处理中有着普遍的应用。而在通过After Effects进行创作的过程中,各种插件又让人们如虎添翼。在这里,笔者总结了一个利用AE第...Adobe After Effects因其可以高效且精确地创建无数种引人注目的动态图形和震撼人心的视觉效果在影视后期合成处理中有着普遍的应用。而在通过After Effects进行创作的过程中,各种插件又让人们如虎添翼。在这里,笔者总结了一个利用AE第三方插件——Trapcode Particular来制作一个看上去具有一种"往事随风"意味的特效制作方法。展开更多
Regional inequality is a core issue in geography,and it can be measured by several approaches and indexes.However,the global inequality measures can not reflect regional characteristics in terms of spatiality and non-...Regional inequality is a core issue in geography,and it can be measured by several approaches and indexes.However,the global inequality measures can not reflect regional characteristics in terms of spatiality and non-mobility,as well as correctly explore regional inequality in particular directions.Although conventional between-group inequality indexes can measure the inequality in particular directions,they can not reflect the reversals of regional patterns and changes of within-group patterns.Therefore,we set forth a new approach to measure regional inequality in particular directions,which is applicable to geographic field.Based on grouping,we established a new index to measure regional inequality in particular directions named Particular Direction Inequality index(PDI index),which is comprised of between-group inequality of all data and between-group average gap.It can reflect regional spatiality and non-mobility,judge the main direction of regional inequality,and capture the changes and reversals of regional patterns.We used the PDI index to measure the changes of regional inequality from 1952 to 2009 in China.The results show that:1) the main direction of China's regional inequality was between coastal areas and inland areas;the increasing extent of inequality between coastal areas and inland areas was higher than the global inequality;2) the PDI index can measure the between-region average gap,and is more sensitive to evolution of within-region patterns;3) the inequality between the northern China and the southern China has been decreasing from 1952 to 2009 and was reversed in 1994 and 1995.展开更多
The burning of crop residues emits large quantities of atmospheric aerosols.Published studies have developed inventories of emissions from crop residue burning based on statistical data.In contrast,this study used sat...The burning of crop residues emits large quantities of atmospheric aerosols.Published studies have developed inventories of emissions from crop residue burning based on statistical data.In contrast,this study used satellite-retrieved land-cover data(1 km×1 km)as activity data to compile an inventory of atmospheric pollutants emitted from the burning of crop residues in China in 2015.The emissions of PM10,PM2.5,VOCs,NOx,SO2,CO,and NH3 from burning crop straw on nonirrigated farmland in China in 2015 were 610.5,598.4,584.4,230.6,35.4,3329.3,and 36.1 Gg(1 Gg=109 g),respectively;the corresponding emissions from burning paddy rice residues were 234.1,229.7,342.3,57.5,57.5,1122.1,and 21.5 Gg,respectively.The emissions from crop residue burning showed large spatial and temporal variations.The emissions of particulate matter and gaseous pollutants from crop residue burning in nonirrigated farmland were highest in east China,particularly in Shandong,Henan,Anhui,and Sichuan provinces.Emissions from burning paddy rice residue were highest in east and central China,with particularly high levels in Shandong,Jiangsu,Zhejiang,and Hunan provinces.The monthly variations in atmospheric pollutant emissions were similar among different regions,with the highest levels observed in October in north,northeast,northwest,east,and southwest China and in June and July in central and south China.The developed inventory of emissions from crop residue burning is expected to help improve air quality models by providing high-resolution spatial and temporal data.展开更多
文摘Adobe After Effects软件中经常用到的特效合成插件有Particular、E3D、Form、Plexus等,这些插件各自配备了一套独立的粒子系统。当它们处于同一个合成中时,粒子之间并不会自然融合在一起,而是根据上下图层的关系进行相互遮挡。本文深入探讨了不同粒子插件之间相互穿插与遮挡的实现方式,并结合实例阐述制作过程,模拟出两种粒子在同一合成空间中交互融合的逼真效果。
基金supported by the Jiangsu Commission of Health(LR2022004&LKZ2023005)the Project of Zhongda Hospital Affiliated to Southeast University for Cultivating Academic Talent(CZXM-GSPRC22)+2 种基金the Zhongda Hospital Affiliated to Southeast University,Jiangsu Province High-Level Hospital Pairing Assistance Construction Funds(ZDLYG10)the Zhongda Hospital Affiliated to Southeast University,Jiangsu Province High-Level Hospital Construction Funds(GSP-LCYJFH17)the Nanjing Commission of Health(YKK24257).
文摘BACKGROUND Physical inactivity is a significant yet underappreciated risk factor for cardiovascular disease(CVD),particularly among older adults.The aim of this study was to analyze the global burden of CVD attributable to physical inactivity in individuals aged 70 years and older from 1990 to 2021 using the Global Burden of Disease data.METHODS We assessed trends in disability-adjusted life years(DALYs)and deaths,decomposed changes into population growth,aging,and epidemiological factors,and examined health inequalities across sociodemographic index(SDI)regions.RESULTS From 1990 to 2021,a substantial rise in DALYs was observed,especially in low and middle SDI regions,with a 120.06% increase in the low SDI region,but a 23.10% decline in the high SDI region.Decomposition analysis identified population aging and growth as primary drivers for the burden,contributing 66.39% and 83.56% to the increase in middle and low SDI regions,respectively.By contrast,epidemiological improvements alleviated burden in the high SDI region(54.91%).Gender disparities persisted,with women experiencing a higher burden.Inequality analysis indicated a shift in CVD burden towards the low SDI region,with declining concentration indices for DALYs(-0.03 to-0.13)and deaths(-0.07 to-0.15).The Bayesian age-period-cohort projections suggest continued increases in DALYs and deaths through 2050,with women disproportionately affected.CONCLUSIONS These findings highlight the urgent need for targeted interventions promoting physical activity,improving healthcare access,and implementing region-specific prevention strategies.
文摘We are pleased to announce the special topic of“AI for Polymers”published in the Chinese Journal of Polymer Science (CJPS).In recent years,the advancements in artificial intelligence (AI) techniques,including machine learning(particularly deep learning) and data-driven modeling,are reshaping how we design,synthesize and characterize polymers.In particular,a strong and lively research community in the development and application of AI techniques to polymer science has emerged in China,making great contributions to this important area of research in polymer science.With the growing interest in the application of AI to polymer science,we believe it is the right time to organize a special topic showcasing the activities and achievements of this community.
文摘The rapid advancements in Artificial Intelligence(AI),particularly the emergence of large language models(LLMs)such as ChatGPT and DeepSeek,have brought transformative changes to the entire scientific research ecosystem.As evidenced by the science map of more than 10,000 papers mentioning ChatGPT(see Figure 1),nearly every field of research is actively engaging with and discussing the implications of these technologies.
文摘Traditional Medicine(TM),particularly Traditional Chinese Medicine(TCM),is an indispensable component of the global healthcare system,offering unique insights to modern medical science.Clinical efficacy is the bedrock for the inheritance and development of TM.To meet the growing demand for high-quality healthcare,it is imperative to integrate TM with modern technology to address the issue of insufficient evidence for the efficacy of TM.
基金Support for this study was provided by grants from the NSFC-Yunnan joint fund to support key projects to G.Chen(U1602264)the National Natural Science Foundation of China(31670322)the Young Academic and Technical Leader Raising Foundation of Yunnan Province(2015HB091)to G.Chen
文摘Flowers or inflorescences often deploy various signals, including visual, olfactory, and gustatory cues,that can be detected by their pollinators. In many plants,these cues and their functions are poorly understood.Deciphering the interactions between floral cues and pollinators is crucial for analyzing the reproductive success of flowering plants. In this study, we examined the composition of the fetid floral scents produced by several Stemona species, including nine S. tuberosa populations from across China, using dynamic headspace adsorption, gas chromatography, and mass spectrometry techniques. We compared variations in floral phenotype,including floral longevity, nectar rewards, pollinator behavior, and flower length and color among the Stemona species. Of the 54 scent compounds identified,the major compounds include fetid dimethyl disulfide,dimethyl trisulfide, 1-pyrroline, butyric acid, p-cresol,isoamyl alcohol, and indole. We detected striking differentiation in floral scent at both the species and population level, and even within a population of plants with different colored flowers. Floral characteristics related to sapromyophily and deceptive pollination,including flower color mimicking livor mortis and a lack of nectar, were found in five Stemona species, indicating that Stemona is a typical sapromyophilous taxon. Species of this monocot genus might employ evolutionary tactics to exploit saprophilous flies for pollination.
文摘Using films by Patricia Rozema and Igmar Bergman,“Lowering Human Hubris into the Sublime”reminds the reader that the particular in our lives is where the sublime performs.While we multitask and take for granted the world around us that supports our mythic assumptions,the particular objects and lives are actively present.In the two movies,the particular functions as a source of the sublime reminder and source of metaphor for stability and atrophy in everyday living.In one film an artist focuses the ordinary objects in everyday life while being disregarded by artists involved in the abstract.In the second film the particular behind the scenes works quietly to dismantle cultural beliefs for the people living the soon to be dated beliefs where opportunities for more inclusive community reside.
基金supported by the National Natural Science Foundation of China(Nos.42277091 and U22A20578)Xiamen Youth Innovation Fund Project(No.3502Z20206094)+1 种基金Fujian Provincial Environmental Protection Science&Technology Plan Projects(No.2023R004)Xiamen Atmospheric Environment Observation and Research Station of Fujian Province.
文摘Aerosol acidity(pH)plays an important role in the multiphase chemical processes of atmospheric particles.In this study,we demonstrated the seasonal trends of aerosol pH calculated with the ISORROPIA-II model in a coastal city of southeast China.We performed quantitative analysis on the various influencing factors on aerosol pH,and explored the responses of aerosol pH to different PM_(2.5)and O_(3)pollution levels.The results showed that the average aerosol pH was 2.92±0.61,following the order of winter>spring>summer>autumn.Sensitivity tests revealed that SO_(4)^(2−),NH_(x),T and RH triggered the variations of aerosol pH.Quantitative analysis results showed that T(37.9%-51.2%)was the main factors affecting pH variations in four seasons,followed by SO_(4)^(2−)(6.1%-23.7%),NH_(x)(7.2%-22.2%)and RH(0–14.2%).Totally,annual mean meteorological factors(52.9%)and chemical compositions(41.3%)commonly contributed the aerosolpH in the coastal city.The concentrations of PM_(2.5)was positively correlated with aerosol liquid water content(R^(2)=0.53)and aerosol pH(R^(2)=0.26),indicating that the increase in pH was related with the elevated NH_(4)NO_(3)and decreased SO_(4)^(2−),and also the changes of T and RH.The O_(x)(O_(3)+NO_(2))was moderately correlated with aerosol pH(R^(2)=-0.48),attributable to the fact that the proportion of SO_(4)^(2−)increased under high T and low RH conditions.The study strengthened our understanding of the contributions of influencing factors to aerosol pH,and also provided scientific evidences for chemical processes of atmospheric particles in coastal areas.
基金supported by the Science and Technology Research Project of Education Department of Jiangxi Province,Philippine Council for Industry,Energy,and Emerging Technology Research and Development(Grant Nos.GJJ2200605)the National Natural Science Foundation of China(11461026)Jiangxi Provincial Natural Science Foundation(20282BA8201016).
文摘In this paper,the method of polynomial particular solutions is used to solve nonlinear Poisson-type partial differential equations in one,two,and three dimensions.The condition number of the coefficient matrix is reduced through the implementation of multiple scale technique,ultimately yielding a stable numerical solution.The methodological process can be divided into two main parts:first,identifying the corresponding polynomial particular solutions for the linear differential operator terms in the governing equations,and second,employing these polynomial particular solutions as basis function to iteratively solve the remaining nonlinear terms within the governing equations.Additionally,we investigate the potential improvement in numerical accuracy for equations with singularities in the analytical solution by shifting the computational domain a certain distance.Numerical experiments are conducted to assess both the accuracy and stability of the proposed method.A comparison of the obtained results with those produced by other numerical methods demonstrates the accuracy,stability,and efficiency of the proposed method in handling nonlinear Poisson-type partial differential equations.
文摘随着影视制作技术的快速发展,一部部令人耳目一新、制作精良的影视剧持续推出,留给观众深刻印象的不仅有引人入胜的剧情画面表达,也有细致精美的片头片尾及细节文字的画面包装,如个性的字幕设计或者唯美的片头片尾包装等。本文将介绍如何运用After Effects CC 2018的Particular插件制作唯美粒子发散特效,达到提升影视中的图片包装效果。
文摘The international journal Sciences in Cold and Arid Regions,is devoted to publishing the latest research achievements in processes and the patterns of the Earth surface system in cold and arid regions.Research in cold regions emphasize particularly on the cold-region-characterized physical,chemical and biological processes and their interactions,and on the response of cryosphere to global change and human activities as well as their effects on environment and the acclimatizable strategies.
文摘From the perspective of the poverty of stimulus argument and the cognitive development theory, this paper attempts to reveal the mechanism of language acquisition. The poverty of stimulus argument theoretically proves the hypothesis that based on their finite linguistic experience, children can construct their complete language knowledge system. Language acquisition is the process of acquisition of core grammar and of mental representation of vocabulary. Parameter values must be set in the process of children＇s core grammar acquisition. Vocabulary of natural language is stored and processed in the form of conceptual representation, which is associated with syntactic structures by projection rules and bounded by various well-formed rules. The cognitive development theory claims that language acquisition is a development process of universal grammar into particular grammar, which is redescribed at a higher level.
文摘It is well known that Earth history is punctuated by events during which large volumes of mafic magmas were generated and emplaced by processes unrelated to“normal”sea-floor spreading and subduction.These are recognized as Large Igneous Provinces.Systematic Study of dykes helps to understand and solve many geological problems.It helps to recognize Large Igneous Provinces(LIPs),particularly for the Precambrian period.Many LIPs can be linked to regional-scale uplift,continental rifting and breakup,and climatic shifts.
文摘Adobe After Effects因其可以高效且精确地创建无数种引人注目的动态图形和震撼人心的视觉效果在影视后期合成处理中有着普遍的应用。而在通过After Effects进行创作的过程中,各种插件又让人们如虎添翼。在这里,笔者总结了一个利用AE第三方插件——Trapcode Particular来制作一个看上去具有一种"往事随风"意味的特效制作方法。
基金Under the auspices of National Natural Science Foundation of China(No.40971101)Main Direction Program of Knowledge Innovation of Chinese Academy of Sciences(No.KZC X2-YW-321-05)
文摘Regional inequality is a core issue in geography,and it can be measured by several approaches and indexes.However,the global inequality measures can not reflect regional characteristics in terms of spatiality and non-mobility,as well as correctly explore regional inequality in particular directions.Although conventional between-group inequality indexes can measure the inequality in particular directions,they can not reflect the reversals of regional patterns and changes of within-group patterns.Therefore,we set forth a new approach to measure regional inequality in particular directions,which is applicable to geographic field.Based on grouping,we established a new index to measure regional inequality in particular directions named Particular Direction Inequality index(PDI index),which is comprised of between-group inequality of all data and between-group average gap.It can reflect regional spatiality and non-mobility,judge the main direction of regional inequality,and capture the changes and reversals of regional patterns.We used the PDI index to measure the changes of regional inequality from 1952 to 2009 in China.The results show that:1) the main direction of China's regional inequality was between coastal areas and inland areas;the increasing extent of inequality between coastal areas and inland areas was higher than the global inequality;2) the PDI index can measure the between-region average gap,and is more sensitive to evolution of within-region patterns;3) the inequality between the northern China and the southern China has been decreasing from 1952 to 2009 and was reversed in 1994 and 1995.
基金Under the auspices of National Key R&D Program of China(No.2017YFC0212303,2017YFC0212304)Key Research Program of Frontier Sciences,Chinese Academy of Sciences(No.QYZDB-SSW-DQC045)+1 种基金National Natural Science Foundation of China(No.41775116)Youth Innovation Promotion Association of Chinese Academy of Sciences(No.2017275).
文摘The burning of crop residues emits large quantities of atmospheric aerosols.Published studies have developed inventories of emissions from crop residue burning based on statistical data.In contrast,this study used satellite-retrieved land-cover data(1 km×1 km)as activity data to compile an inventory of atmospheric pollutants emitted from the burning of crop residues in China in 2015.The emissions of PM10,PM2.5,VOCs,NOx,SO2,CO,and NH3 from burning crop straw on nonirrigated farmland in China in 2015 were 610.5,598.4,584.4,230.6,35.4,3329.3,and 36.1 Gg(1 Gg=109 g),respectively;the corresponding emissions from burning paddy rice residues were 234.1,229.7,342.3,57.5,57.5,1122.1,and 21.5 Gg,respectively.The emissions from crop residue burning showed large spatial and temporal variations.The emissions of particulate matter and gaseous pollutants from crop residue burning in nonirrigated farmland were highest in east China,particularly in Shandong,Henan,Anhui,and Sichuan provinces.Emissions from burning paddy rice residue were highest in east and central China,with particularly high levels in Shandong,Jiangsu,Zhejiang,and Hunan provinces.The monthly variations in atmospheric pollutant emissions were similar among different regions,with the highest levels observed in October in north,northeast,northwest,east,and southwest China and in June and July in central and south China.The developed inventory of emissions from crop residue burning is expected to help improve air quality models by providing high-resolution spatial and temporal data.
