The labor flow promotes the industrial structure evolution,thereby affecting the growth of productivity.In the western industrialized countries,improvement in labor productivity has become an important source of econo...The labor flow promotes the industrial structure evolution,thereby affecting the growth of productivity.In the western industrialized countries,improvement in labor productivity has become an important source of economic growth.On the basis of analyzing changes of the industrial structure,changes of the structure of labor factor,changes of labor productivity and the growth rate in Guangdong Province in different periods,we use shift-share method to analyze the labor productivity effect of industrial structure in Guangdong Province,and put forward the following recommendations for the adjustment of industrial structure in Guangdong Province:(i) The adjustment of industrial structure should promote the reasonable and effective flow of labor between industries;(ii) Accelerating the optimization of the industrial structure is conducive to economic growth and improvement in labor productivity;(iii) In addition to structural optimization,the improvement in labor productivity should also focus on the improvement in intra-industry technology.展开更多
The present study is focused on the structure of time frequency spectrum.A scaling law for Eulerian time frequency spectrum and the corresponding temporal structure function are calculated from the sweeping hypothesis...The present study is focused on the structure of time frequency spectrum.A scaling law for Eulerian time frequency spectrum and the corresponding temporal structure function are calculated from the sweeping hypothesis and Kolmogorov’s similarity law regarding spatial structure function.An experiment is designed to study this scaling law in the atmospheric turbulent boundary layer.The results well support the conclusion derived from relevant theoretical analysis.展开更多
This paper discusses how the infinite set of real numbers between 0 and 1 could be represented by a countably infinite tree structure which would avoid Cantor’s diagonalization argument that the set of real numbers i...This paper discusses how the infinite set of real numbers between 0 and 1 could be represented by a countably infinite tree structure which would avoid Cantor’s diagonalization argument that the set of real numbers is not countably infinite. Likewise, countably infinite tree structures could represent all real numbers, and all points in any number of dimensions in multi-dimensional spaces. The objective of this paper is not to overturn previous research based on Cantor’s argument, but to suggest that this situation may be treated as a definitional or axiomatic choice. This paper proposes a “non-Cantorian” branch of cardinality theory, representing all these infinities with countably infinite tree structures. This approach would be consistent with the Continuum Hypothesis.展开更多
许多研究探索了与全球变化相关的生态系统功能的变化,但对生态系统功能变化的机制与途径了解较少。初级生产力是生态系统功能的重要组分,但关于氮(N)添加下荒漠草原植物群落初级生产力如何变化以及变化机制尚未明确,N是否通过影响生物...许多研究探索了与全球变化相关的生态系统功能的变化,但对生态系统功能变化的机制与途径了解较少。初级生产力是生态系统功能的重要组分,但关于氮(N)添加下荒漠草原植物群落初级生产力如何变化以及变化机制尚未明确,N是否通过影响生物多样性来影响荒漠草原初级生产力?为此,本研究在荒漠草原开展了为期4年的N添加控制实验(2018—2021年),试验处理包括对照和4个N添加水平(5、10、20和40 g m^(-2)a^(-1)),研究了N添加对荒漠草原物种多样性、功能多样性、初级生产力及其关系的影响。结果表明:(1)N添加处理(2018—2021年)改变了植物物种多样性及功能多样性,但年际间变化趋势不同。N添加处理第四年(2021年)荒漠草原植物功能多样性(Rao指数)、群落加权平均值-株高、功能均匀度和功能离散度均显著增加,而荒漠草原植物物种丰富度和Shannon-Wiener指数均显著降低。(2)N添加可以通过影响物种丰富度和功能多样性进而间接地促进荒漠草原初级生产力,但群落加权性状值-株高对初级生产力的影响是正效应,而物种丰富度和功能离散度对初级生产力的影响是负效应。(3)生物量比率假说更能解释荒漠草原植物群落初级生产力的变异。我们的研究表明了N添加主要通过改变群落内优势物种的功能性状来调节荒漠草原植物初级生产力。展开更多
It is verified that the Nebula Hypothesis is applicable to the Solar System by way of a straightforward generalization of Kepler’s third law which also confirms that angular momentum transport is achieved by way of t...It is verified that the Nebula Hypothesis is applicable to the Solar System by way of a straightforward generalization of Kepler’s third law which also confirms that angular momentum transport is achieved by way of the self-gravity of the protoplanetary disk itself as it coalesces into planetesimals. The masses of the planets may then be approximately determined (within 10% error, for three planets) by way of this methodology, using the radius as well as the rate of rotation of the particular planet being considered. This would only be possible, not only in light of the Nebula Hypothesis, but also due to angular momentum transport (as these three planets most ideally express the expectations of angular momentum conservation from the protoplanetary disk). Also in this regard, the rotation of the Sun at its equator is discussed as it is found to be closely related to the planetary issue as it pertains to the evolution and structure of the body. A modified technique from that used in planetary study is then applied to the Galaxy for the purpose of the calculation of dark matter mass, presupposes treating the Galaxy as a homogeneous sphere (of dark matter) that is rotating. The model provides clear evidence of not only flat rotation-curves, but also the lack of centrifugal ejection of stars from galaxies as well as the configuration of the arms of spiral galaxies, along with a sound basis for black hole creation at the center of spiral galaxies.展开更多
This article argues that the Haitian Vodou spirits(lwas)of fertility and death,Gede,do not promote homosexuality or the fluidity of sexuality in Haitian culture.The latter position is a Western reading of Gede grounde...This article argues that the Haitian Vodou spirits(lwas)of fertility and death,Gede,do not promote homosexuality or the fluidity of sexuality in Haitian culture.The latter position is a Western reading of Gede grounded in postmodern and post-structural identity theorizing.Gede in Haitian ontology and epistemology is lwas of fertility and death not sexual identity confusion or fluidity.展开更多
One type of covariance structure is known as blocked compound symmetry.Recently,Roy et al.(J Multivar Anal 144:81–90,2016)showed that,assuming this covariance structure,unbiased estimators are optimal under normality...One type of covariance structure is known as blocked compound symmetry.Recently,Roy et al.(J Multivar Anal 144:81–90,2016)showed that,assuming this covariance structure,unbiased estimators are optimal under normality and described hypothesis testing for independence as an open problem.In this paper,we derive the distributions of unbiased estimators and consider hypothesis testing for independence.Representative test statistics such as the likelihood ratio criterion,Waldstatistic,Rao’s score statistic,and gradient statistic are derived,and we evaluate the accuracy of the test using these statistics through numerical simulations.The power of the Wald test is the largest when the dimension is high,and the power of the likelihood ratio test is the largest when the dimension is low.展开更多
文摘The labor flow promotes the industrial structure evolution,thereby affecting the growth of productivity.In the western industrialized countries,improvement in labor productivity has become an important source of economic growth.On the basis of analyzing changes of the industrial structure,changes of the structure of labor factor,changes of labor productivity and the growth rate in Guangdong Province in different periods,we use shift-share method to analyze the labor productivity effect of industrial structure in Guangdong Province,and put forward the following recommendations for the adjustment of industrial structure in Guangdong Province:(i) The adjustment of industrial structure should promote the reasonable and effective flow of labor between industries;(ii) Accelerating the optimization of the industrial structure is conducive to economic growth and improvement in labor productivity;(iii) In addition to structural optimization,the improvement in labor productivity should also focus on the improvement in intra-industry technology.
文摘The present study is focused on the structure of time frequency spectrum.A scaling law for Eulerian time frequency spectrum and the corresponding temporal structure function are calculated from the sweeping hypothesis and Kolmogorov’s similarity law regarding spatial structure function.An experiment is designed to study this scaling law in the atmospheric turbulent boundary layer.The results well support the conclusion derived from relevant theoretical analysis.
文摘This paper discusses how the infinite set of real numbers between 0 and 1 could be represented by a countably infinite tree structure which would avoid Cantor’s diagonalization argument that the set of real numbers is not countably infinite. Likewise, countably infinite tree structures could represent all real numbers, and all points in any number of dimensions in multi-dimensional spaces. The objective of this paper is not to overturn previous research based on Cantor’s argument, but to suggest that this situation may be treated as a definitional or axiomatic choice. This paper proposes a “non-Cantorian” branch of cardinality theory, representing all these infinities with countably infinite tree structures. This approach would be consistent with the Continuum Hypothesis.
文摘许多研究探索了与全球变化相关的生态系统功能的变化,但对生态系统功能变化的机制与途径了解较少。初级生产力是生态系统功能的重要组分,但关于氮(N)添加下荒漠草原植物群落初级生产力如何变化以及变化机制尚未明确,N是否通过影响生物多样性来影响荒漠草原初级生产力?为此,本研究在荒漠草原开展了为期4年的N添加控制实验(2018—2021年),试验处理包括对照和4个N添加水平(5、10、20和40 g m^(-2)a^(-1)),研究了N添加对荒漠草原物种多样性、功能多样性、初级生产力及其关系的影响。结果表明:(1)N添加处理(2018—2021年)改变了植物物种多样性及功能多样性,但年际间变化趋势不同。N添加处理第四年(2021年)荒漠草原植物功能多样性(Rao指数)、群落加权平均值-株高、功能均匀度和功能离散度均显著增加,而荒漠草原植物物种丰富度和Shannon-Wiener指数均显著降低。(2)N添加可以通过影响物种丰富度和功能多样性进而间接地促进荒漠草原初级生产力,但群落加权性状值-株高对初级生产力的影响是正效应,而物种丰富度和功能离散度对初级生产力的影响是负效应。(3)生物量比率假说更能解释荒漠草原植物群落初级生产力的变异。我们的研究表明了N添加主要通过改变群落内优势物种的功能性状来调节荒漠草原植物初级生产力。
文摘It is verified that the Nebula Hypothesis is applicable to the Solar System by way of a straightforward generalization of Kepler’s third law which also confirms that angular momentum transport is achieved by way of the self-gravity of the protoplanetary disk itself as it coalesces into planetesimals. The masses of the planets may then be approximately determined (within 10% error, for three planets) by way of this methodology, using the radius as well as the rate of rotation of the particular planet being considered. This would only be possible, not only in light of the Nebula Hypothesis, but also due to angular momentum transport (as these three planets most ideally express the expectations of angular momentum conservation from the protoplanetary disk). Also in this regard, the rotation of the Sun at its equator is discussed as it is found to be closely related to the planetary issue as it pertains to the evolution and structure of the body. A modified technique from that used in planetary study is then applied to the Galaxy for the purpose of the calculation of dark matter mass, presupposes treating the Galaxy as a homogeneous sphere (of dark matter) that is rotating. The model provides clear evidence of not only flat rotation-curves, but also the lack of centrifugal ejection of stars from galaxies as well as the configuration of the arms of spiral galaxies, along with a sound basis for black hole creation at the center of spiral galaxies.
文摘This article argues that the Haitian Vodou spirits(lwas)of fertility and death,Gede,do not promote homosexuality or the fluidity of sexuality in Haitian culture.The latter position is a Western reading of Gede grounded in postmodern and post-structural identity theorizing.Gede in Haitian ontology and epistemology is lwas of fertility and death not sexual identity confusion or fluidity.
文摘One type of covariance structure is known as blocked compound symmetry.Recently,Roy et al.(J Multivar Anal 144:81–90,2016)showed that,assuming this covariance structure,unbiased estimators are optimal under normality and described hypothesis testing for independence as an open problem.In this paper,we derive the distributions of unbiased estimators and consider hypothesis testing for independence.Representative test statistics such as the likelihood ratio criterion,Waldstatistic,Rao’s score statistic,and gradient statistic are derived,and we evaluate the accuracy of the test using these statistics through numerical simulations.The power of the Wald test is the largest when the dimension is high,and the power of the likelihood ratio test is the largest when the dimension is low.
