The purpose of this paper is to examine the similarities and differences between pronouns in Korean and Myanmar. In other words, we try to help Korean and Myanmar learners to study personal pronouns by comparing the p...The purpose of this paper is to examine the similarities and differences between pronouns in Korean and Myanmar. In other words, we try to help Korean and Myanmar learners to study personal pronouns by comparing the personal pronouns between the two languages. Personal pronouns are used in Myanmar as “pronouns referring to people” as in Korean. The two languages are divided into first person, second person, and third person pronoun. However, looking at functions and usage, there seem to be many differences between the two languages. For example, in the case of Myanmar language, personal pronouns are different according to gender and personal pronouns are used differently for general people and monks. Myanmar also uses the personal pronouns differently depending on colloquial and written language. In the case of Korean language, there is no big difference between the sexes in different languages but there is difference between the people and monks in terms of Myanmar language. However, Korean people have difficulties in learning personal pronouns because their usage differs according to their status and social status. Therefore, in order to solve this problem, it is meaningful to identify commonalities and differences between languages by comparing characteristics and use of personal pronouns between the two languages.展开更多
Ferroelectricity and metallicity are usually believed not to coexist because conducting electrons would screen out static internal electric fields.In 1965,Anderson and Blount proposed the concept of"ferroelectric...Ferroelectricity and metallicity are usually believed not to coexist because conducting electrons would screen out static internal electric fields.In 1965,Anderson and Blount proposed the concept of"ferroelectric metal",however,it is only until recently that very rare ferroelectric metals were reported.Here,by combining high-throughput ab initio calculations and data-driven machine learning method with new electronic orbital based descriptors,we systematically investigated a large family(2964)of two-dimensional(2D)bimetal phosphates,and discovered 60 stable ferroelectrics with out-of-plane polarization,including 16 ferroelectric metals and 44 ferroelectric semiconductors that contain seven multiferroics.The ferroelectricity origins from spontaneous symmetry breaking induced by the opposite displacements of bimetal atoms,and the full-d-orbital coinage metal elements cause larger displacements and polarization than other elements.For 2D ferroelectric metals,the odd electrons per unit cell without spin polarization may lead to a half-filled energy band around Fermi level and is responsible for the metallicity.It is revealed that the conducting electrons mainly move on a single-side surface of the 2D layer,while both the ionic and electric contributions to polarization come from the other side and are vertical to the above layer,thereby causing the coexistence of metallicity and ferroelectricity.Van der Waals heterostructures based on ferroelectric metals may enable the change of Schottky barrier height or the Schottky-Ohmic contact type and induce a dramatic change of their vertical transport properties.Our work greatly expands the family of 2D ferroelectric metals and will spur further exploration of 2D ferroelectric metals.展开更多
文摘The purpose of this paper is to examine the similarities and differences between pronouns in Korean and Myanmar. In other words, we try to help Korean and Myanmar learners to study personal pronouns by comparing the personal pronouns between the two languages. Personal pronouns are used in Myanmar as “pronouns referring to people” as in Korean. The two languages are divided into first person, second person, and third person pronoun. However, looking at functions and usage, there seem to be many differences between the two languages. For example, in the case of Myanmar language, personal pronouns are different according to gender and personal pronouns are used differently for general people and monks. Myanmar also uses the personal pronouns differently depending on colloquial and written language. In the case of Korean language, there is no big difference between the sexes in different languages but there is difference between the people and monks in terms of Myanmar language. However, Korean people have difficulties in learning personal pronouns because their usage differs according to their status and social status. Therefore, in order to solve this problem, it is meaningful to identify commonalities and differences between languages by comparing characteristics and use of personal pronouns between the two languages.
基金the National Key R&D Program of China(2018YFA0305800)the Strategic Priority Research Program of Chinese Academy of Sciences(XDB28000000)+2 种基金the National Natural Science Foundation of China(11834014)Beijing Municipal Science and Technology Commission(Z191100007219013)University of Chinese Academy of Sciences。
文摘Ferroelectricity and metallicity are usually believed not to coexist because conducting electrons would screen out static internal electric fields.In 1965,Anderson and Blount proposed the concept of"ferroelectric metal",however,it is only until recently that very rare ferroelectric metals were reported.Here,by combining high-throughput ab initio calculations and data-driven machine learning method with new electronic orbital based descriptors,we systematically investigated a large family(2964)of two-dimensional(2D)bimetal phosphates,and discovered 60 stable ferroelectrics with out-of-plane polarization,including 16 ferroelectric metals and 44 ferroelectric semiconductors that contain seven multiferroics.The ferroelectricity origins from spontaneous symmetry breaking induced by the opposite displacements of bimetal atoms,and the full-d-orbital coinage metal elements cause larger displacements and polarization than other elements.For 2D ferroelectric metals,the odd electrons per unit cell without spin polarization may lead to a half-filled energy band around Fermi level and is responsible for the metallicity.It is revealed that the conducting electrons mainly move on a single-side surface of the 2D layer,while both the ionic and electric contributions to polarization come from the other side and are vertical to the above layer,thereby causing the coexistence of metallicity and ferroelectricity.Van der Waals heterostructures based on ferroelectric metals may enable the change of Schottky barrier height or the Schottky-Ohmic contact type and induce a dramatic change of their vertical transport properties.Our work greatly expands the family of 2D ferroelectric metals and will spur further exploration of 2D ferroelectric metals.
