Die Walküre is the most frequently staged and most popular title of the Ring cycle among classical music enthusiasts.It tells a complex story that involves intertwined relationships between father and daughter,hu...Die Walküre is the most frequently staged and most popular title of the Ring cycle among classical music enthusiasts.It tells a complex story that involves intertwined relationships between father and daughter,husband and wife,brother and sister,and lovers in the epic context of the Nordic mythology.展开更多
The year 2024 marks the tenth anniversary of General Secretary Xi Jinping’s proposal for a new energy security strategy and the start of the second decade of the Belt and Road Initiative.During this year,the internat...The year 2024 marks the tenth anniversary of General Secretary Xi Jinping’s proposal for a new energy security strategy and the start of the second decade of the Belt and Road Initiative.During this year,the international situation grew increasingly complex,with intensifying rivalries among major powers and sporadic occurrences of geopolitical conflicts and localized disturbances.CNPC’s international operations focus on maintaining stability while making progress,successfully overcoming various intertwined risks and achieving new milestones in international business development.For six consecutive years,the overseas equity production has maintained an equivalent of 100 million tons.International trade has achieved stable progress,and engineering services have made new breakthroughs in market expansion,contributing new momentum to CNPC’s establishment as a world-class enterprise.展开更多
We dealt in a series of previous publications with some geometric aspects of the mappings by functions obtained as analytic continuations to the whole complex plane of general Dirichlet series. Pictures illustrating t...We dealt in a series of previous publications with some geometric aspects of the mappings by functions obtained as analytic continuations to the whole complex plane of general Dirichlet series. Pictures illustrating those aspects contain a lot of other information which has been waiting for a rigorous proof. Such a task is partially fulfilled in this paper, where we succeeded among other things, to prove a theorem about general Dirichlet series having as corollary the Speiser’s theorem. We have also proved that those functions do not possess multiple zeros of order higher than 2 and the double zeros have very particular locations. Moreover, their derivatives have only simple zeros. With these results at hand, we revisited GRH for a simplified proof.展开更多
In this paper, a novel image encryption algorithm is presented based on self-cited pixel summation. With the classical mechanism of permutation plus diffusion, a pixel summation of the plain image is employed to make ...In this paper, a novel image encryption algorithm is presented based on self-cited pixel summation. With the classical mechanism of permutation plus diffusion, a pixel summation of the plain image is employed to make a gravity influence on the pixel positions in the permutation stage. Then, for each pixel in every step of the diffusion stage, the pixel summation calculated from the permuted image is updated. The values from a chaotic sequence generated by an intertwining logistic map are selected by this summation. Consequently, the keystreams generated in both stages are dependent on both the plain image and the permuted image. Because of the sensitivity of the chaotic map to its initial conditions and the plain-imagedependent keystreams, any tiny change in the secret key or the plain image would lead to a significantly different cipher image. As a result, the proposed encryption algorithm is immune to the known plaintext attack（KPA） and the chosen plaintext attack（CPA）. Moreover, experimental simulations and security analyses show that the proposed permutationdiffusion encryption scheme can achieve a satisfactory level of security.展开更多
We review our recent results on computation of the higher genus characters for vertex operator superalgebras modules. The vertex operator formal parameters are associated to local parameters on Riemann surfaces formed...We review our recent results on computation of the higher genus characters for vertex operator superalgebras modules. The vertex operator formal parameters are associated to local parameters on Riemann surfaces formed in one of two schemes of (self- or tori- ) sewing of lower genus Riemann surfaces. For the free fermion vertex operator superalgebra we present a closed formula for the genus two continuous orbifold partition functions (in either sewings) in terms of an infinite dimensional determinant with entries arising from the original torus Szeg? kernel. This partition function is holomorphic in the sewing parameters on a given suitable domain and possesses natural modular properties. Several higher genus generalizations of classical (including Fay’s and Jacobi triple product) identities show up in a natural way in the vertex operator algebra approach.展开更多
We consider the harmonic analysis associated with the Dunkl operators on Rd. We study the Dunkl mean-periodic functions on the space ε(Rd) (the space of C∞-functions). We characterize also the continuous linear mapp...We consider the harmonic analysis associated with the Dunkl operators on Rd. We study the Dunkl mean-periodic functions on the space ε(Rd) (the space of C∞-functions). We characterize also the continuous linear mappings from ε(Rd) into itself which commute with the Dunkl operators.展开更多
In this paper, the determinacy of regular lexical selectional restrictions is examined from both the internal structures of the single selectional restrictions (i.e.semantic selectional restrictions) and relationship ...In this paper, the determinacy of regular lexical selectional restrictions is examined from both the internal structures of the single selectional restrictions (i.e.semantic selectional restrictions) and relationship between the structures of several selectional restrictions. Hence, our analysis and description are shifted from casual and indeterminate strings and markers on case basis to determined rules and circumspect dynamic systems, from lexical precepts to knowledge precepts, from the state of memory to rational deduction and rhetorical devices. Further studies indicate that selectional restrictions are intertwined structures, a feature that makes it possible to be one of the bases for lexical selectional restrictions to come into existence. Its related theories are the grarantee for scientific observations of selectional restriction structures.展开更多
The construction of an unprecedented intertwined spiral solvent channel is driven by weak C–Cl…O and C–H…N interactions based on extraordinary parallel spirals which were structured from supramolecular synthon mac...The construction of an unprecedented intertwined spiral solvent channel is driven by weak C–Cl…O and C–H…N interactions based on extraordinary parallel spirals which were structured from supramolecular synthon macrocycle 1（C44H44N4O4） with a propargylamine backbone. The product is characterized by ^1H NMR, ^13C NMR, IR and HRMS, and further confirmed by single-crystal X-ray diffraction. It crystallizes in the monoclinic system, space group C2/c, with a = 28.922（3）, b = 8.5069（9）, c = 21.687（2）A^°, β = 130.6320（10）°, V = 4049.4（7） A^°3 and Z = 8. A total of 11874 reflections were collected, of which 4942 were independent（Rint = 0.0590） and 2937 were observed with I 〉 2σ（I）. The final full-matrix least-squares refinement gave R（I 〉 2s（I）） = 0.069 and w R = 0.167, S = 1.05,（Δρ）max = 0.20 and（Δρ）min =-0.22 e·A^1-3. The fluorescence of the product is discussed.展开更多
The global landscape of the twenty-first century is increasingly shaped by an intricate web of interconnected crises.Such a system of crises—the polycrisis—is characterized by mutual amplification of nested and inte...The global landscape of the twenty-first century is increasingly shaped by an intricate web of interconnected crises.Such a system of crises—the polycrisis—is characterized by mutual amplification of nested and intertwined risks and requires novel approaches to analysis,assessment,and governance.展开更多
In the thriving fields of thermal management fields,ceramic films with superior thermal insulation and excellent mechanical properties are in high demand.Nevertheless,the fabrication of ceramic films that combine both...In the thriving fields of thermal management fields,ceramic films with superior thermal insulation and excellent mechanical properties are in high demand.Nevertheless,the fabrication of ceramic films that combine both mechanical performance and low thermal conductivity remains highly challenging.Herein,we report a dual-phase Si_(3)N_(4) nanowire-boron nitride(BN)nanosheet(SNB)with an intertwined structure,where BN nanosheets are firmly intertwined on the surface of Si_(3)N_(4) nanowires.The results demonstrate that the SNB film possesses exceptional mechanical properties,with a tensile strength of 5.25 MPa,representing a 127% improvement over the Si_(3)N_(4) nanowire film(SN)without BN nanosheets incorporation.Simultaneously,benefiting from the interface and cross-linking nodes formed between Si_(3)N_(4) nanowires and BN nanosheets,the thermal conductivity of the SNB film is as low as 0.043 W·m^(–1)·K^(–1),marking a 23% reduction compared to the SN film without BN nanosheets.Furthermore,the all-ceramic component characteristic endows the SNB film with high temperature resistance up to 1200℃.The combination of high strength,low thermal conductivity,and high-temperature resistance enables the SNB film a promising candidate for applications in high temperature environments.展开更多
In this paper, for a vertex operator algebra V with an automorphism g of order T, an admissible V-module M and a fixed nonnegative rational number n ∈1/T Z_+, we construct an A_(g,n)(V)-bimodule Ag,n(M) and study its...In this paper, for a vertex operator algebra V with an automorphism g of order T, an admissible V-module M and a fixed nonnegative rational number n ∈1/T Z_+, we construct an A_(g,n)(V)-bimodule Ag,n(M) and study its properties, discuss the connections between bimodule A_(g,n)(M) and intertwining operators. Especially, bimodule A _(g,n)-1T(M) is a natural quotient of A_(g,n)(M) and there is a linear isomorphism between the space IM^k M Mjof intertwining operators and the space of homomorphisms HomA_(g,n)(V)(A_(g,n)(M) A_(g,n)(V)M^j(s), M^k(t)) for s, t ≤ n, M^j, M^k are g-twisted V modules, if V is g-rational.展开更多
The author constructs unitary intertwiners for degenerate C*-algebraic universal principal series of SL(n + 1) over a local field by explicitely normalizing standard intertwining integrals at the level of Hilbert modu...The author constructs unitary intertwiners for degenerate C*-algebraic universal principal series of SL(n + 1) over a local field by explicitely normalizing standard intertwining integrals at the level of Hilbert modules.展开更多
This paper traces the genealogy of reversibility,chiasma,and chiasme in Merleau-Ponty's writings and offers a new characterisation of his later ontology in terms of a multi-layered chiasme-focused topology informe...This paper traces the genealogy of reversibility,chiasma,and chiasme in Merleau-Ponty's writings and offers a new characterisation of his later ontology in terms of a multi-layered chiasme-focused topology informed by subtle differences and interconnections among these notions.We need to grasp the significance of reversibility not only in terms of constant recoil and impossible overlap but also of its situatedness in the crisscrossing between Dasein and things,and between the inside/invisible and the outside/visible."Chiasma" was initially introduced as a reference to the intersection of perspectives.Merleau-Ponty deploys it to articulate macroscopic insights concerning the nature of philosophy and the interweaving connections between self,other,and the world.In comparison,"reversibility" is primarily used to describe the microscopic bond between touching-touched and perceiving-perceived.I argue that,as Merleau-Ponty's ultimate choice of wording,"chiasme" incorporated the significance of both "reversibility" and "chiasma." A chiasme-focused topology that retains the significance of all three of the terms would serve to better convey the import of Merleau-Ponty's later ontology,which aims to dissolve and to re-configure our conceptions about being,body,self,and the other from within and from below.展开更多
In this paper we consider the Heckman-Opdam-Jacobi operatorΔ_(H J)on R^(d+1).We define the Heckman-Opdam-Jacobi intertwining operator V_(H J),which turns out to be the transmutation operator betweenΔ_(H J)and the La...In this paper we consider the Heckman-Opdam-Jacobi operatorΔ_(H J)on R^(d+1).We define the Heckman-Opdam-Jacobi intertwining operator V_(H J),which turns out to be the transmutation operator betweenΔ_(H J)and the LaplacianΔ_(d+1).Next we construct^(t)V_(H J)the dual of this intertwining operator.We exploit these operators to develop a new harmonic analysis corresponding toΔ_(H J).展开更多
We consider the tensor product π_α ? π_βof complementary series representations π_α and π_β of classical rank one groups SO_0(n, 1), SU(n, 1) and Sp(n, 1). We prove that there is a discrete component π_(α+β...We consider the tensor product π_α ? π_βof complementary series representations π_α and π_β of classical rank one groups SO_0(n, 1), SU(n, 1) and Sp(n, 1). We prove that there is a discrete component π_(α+β)for small parameters α and β(in our parametrization). We prove further that for SO_0(n, 1) there are finitely many complementary series of the form π_(α+β+2j,)j = 0, 1,..., k, appearing in the tensor product π_α ? π_βof two complementary series π_α and π_β, where k = k(α, β, n) depends on α, β and n.展开更多
The rate of multiple pregnancy is increasing, mainly because of the widespread use of assisted reproduction techniques and families’ desire for twins. Twin pregnancy accounts for a higher risk of chromosomal abnormal...The rate of multiple pregnancy is increasing, mainly because of the widespread use of assisted reproduction techniques and families’ desire for twins. Twin pregnancy accounts for a higher risk of chromosomal abnormalities, structural malformations, and neonatal adverse events than singleton pregnancy. The presence of artery-vein anastomoses, unbalanced placenta sharing, and abnormal cord insertion in monochorionic twins is associated with twin complications such as twin-to-twin transfusion syndrome, selective intrauterine growth restriction, and twin anemia polycythemia sequence. Although many guidelines and studies have established and improved the processes about the antenatal surveillance and management of twin pregnancy, they also raise more controversies and challenges. This review aims to highlight the international consensus on the antenatal care of twin pregnancies and analyze the controversies and predicaments based on the published International Federation of Gynecology and Obstetrics guidelines and research.展开更多
To the east of Fuzhou,capital of Fujian Province in southeast China,stands a verdant mountain known as Kuliang.In the mid-19th century,many international vips settled in the city.Kuliang rose to fame as a beloved su...To the east of Fuzhou,capital of Fujian Province in southeast China,stands a verdant mountain known as Kuliang.In the mid-19th century,many international vips settled in the city.Kuliang rose to fame as a beloved summer retreat,attracting expatriates who had made Fuzhou their home.For nearly a century,foreign and local residents lived together in harmony,and Kuliang blossomed into a unique international community where Eastern and Western cultures intertwined.展开更多
文摘Die Walküre is the most frequently staged and most popular title of the Ring cycle among classical music enthusiasts.It tells a complex story that involves intertwined relationships between father and daughter,husband and wife,brother and sister,and lovers in the epic context of the Nordic mythology.
文摘The year 2024 marks the tenth anniversary of General Secretary Xi Jinping’s proposal for a new energy security strategy and the start of the second decade of the Belt and Road Initiative.During this year,the international situation grew increasingly complex,with intensifying rivalries among major powers and sporadic occurrences of geopolitical conflicts and localized disturbances.CNPC’s international operations focus on maintaining stability while making progress,successfully overcoming various intertwined risks and achieving new milestones in international business development.For six consecutive years,the overseas equity production has maintained an equivalent of 100 million tons.International trade has achieved stable progress,and engineering services have made new breakthroughs in market expansion,contributing new momentum to CNPC’s establishment as a world-class enterprise.
基金supported by the National Natural Science Foundations of China(Nos.12171136,12411530045)the Natural Science Foundation of Hebei Province(No.A2020202005)+1 种基金the Natural Science Foundation of Tianjin City(No.20JCYBJC00750)the Overseas Returnees Program of Hebei Province(No.C201809)。
文摘The authors study the compact intertwining relation for the composition operators and integral operators between mixed-norm spaces and Zygmund spaces.
文摘We dealt in a series of previous publications with some geometric aspects of the mappings by functions obtained as analytic continuations to the whole complex plane of general Dirichlet series. Pictures illustrating those aspects contain a lot of other information which has been waiting for a rigorous proof. Such a task is partially fulfilled in this paper, where we succeeded among other things, to prove a theorem about general Dirichlet series having as corollary the Speiser’s theorem. We have also proved that those functions do not possess multiple zeros of order higher than 2 and the double zeros have very particular locations. Moreover, their derivatives have only simple zeros. With these results at hand, we revisited GRH for a simplified proof.
基金supported by the National Natural Science Foundation of China(Grant Nos.61602124,61273021,11526057,and 11301091)the Natural Science Foundation of Guangdong Province,China(Grant Nos.2016A030310333,2015A030313614,and 2015A030313620)+3 种基金the Science & Technology Planning Projects of Zhanjiang City,China(Grant Nos.2015B01098 and 2015B01051)the Project Foundation of Chongqing Municipal Education Committee of China(Grant No.KJ1500501)the Program for Scientific Research Start-up Funds of Guangdong Ocean University of Chinathe Special Funding Program for Excellent Young Scholars of Guangdong Ocean University of China
文摘In this paper, a novel image encryption algorithm is presented based on self-cited pixel summation. With the classical mechanism of permutation plus diffusion, a pixel summation of the plain image is employed to make a gravity influence on the pixel positions in the permutation stage. Then, for each pixel in every step of the diffusion stage, the pixel summation calculated from the permuted image is updated. The values from a chaotic sequence generated by an intertwining logistic map are selected by this summation. Consequently, the keystreams generated in both stages are dependent on both the plain image and the permuted image. Because of the sensitivity of the chaotic map to its initial conditions and the plain-imagedependent keystreams, any tiny change in the secret key or the plain image would lead to a significantly different cipher image. As a result, the proposed encryption algorithm is immune to the known plaintext attack（KPA） and the chosen plaintext attack（CPA）. Moreover, experimental simulations and security analyses show that the proposed permutationdiffusion encryption scheme can achieve a satisfactory level of security.
文摘We review our recent results on computation of the higher genus characters for vertex operator superalgebras modules. The vertex operator formal parameters are associated to local parameters on Riemann surfaces formed in one of two schemes of (self- or tori- ) sewing of lower genus Riemann surfaces. For the free fermion vertex operator superalgebra we present a closed formula for the genus two continuous orbifold partition functions (in either sewings) in terms of an infinite dimensional determinant with entries arising from the original torus Szeg? kernel. This partition function is holomorphic in the sewing parameters on a given suitable domain and possesses natural modular properties. Several higher genus generalizations of classical (including Fay’s and Jacobi triple product) identities show up in a natural way in the vertex operator algebra approach.
文摘We consider the harmonic analysis associated with the Dunkl operators on Rd. We study the Dunkl mean-periodic functions on the space ε(Rd) (the space of C∞-functions). We characterize also the continuous linear mappings from ε(Rd) into itself which commute with the Dunkl operators.
文摘In this paper, the determinacy of regular lexical selectional restrictions is examined from both the internal structures of the single selectional restrictions (i.e.semantic selectional restrictions) and relationship between the structures of several selectional restrictions. Hence, our analysis and description are shifted from casual and indeterminate strings and markers on case basis to determined rules and circumspect dynamic systems, from lexical precepts to knowledge precepts, from the state of memory to rational deduction and rhetorical devices. Further studies indicate that selectional restrictions are intertwined structures, a feature that makes it possible to be one of the bases for lexical selectional restrictions to come into existence. Its related theories are the grarantee for scientific observations of selectional restriction structures.
基金supported by the Natural Science Foundation of Anhui Province Education Department(No.KJ2014A141,No.KJ2015A243,No.KJ2016A862)
文摘The construction of an unprecedented intertwined spiral solvent channel is driven by weak C–Cl…O and C–H…N interactions based on extraordinary parallel spirals which were structured from supramolecular synthon macrocycle 1（C44H44N4O4） with a propargylamine backbone. The product is characterized by ^1H NMR, ^13C NMR, IR and HRMS, and further confirmed by single-crystal X-ray diffraction. It crystallizes in the monoclinic system, space group C2/c, with a = 28.922（3）, b = 8.5069（9）, c = 21.687（2）A^°, β = 130.6320（10）°, V = 4049.4（7） A^°3 and Z = 8. A total of 11874 reflections were collected, of which 4942 were independent（Rint = 0.0590） and 2937 were observed with I 〉 2σ（I）. The final full-matrix least-squares refinement gave R（I 〉 2s（I）） = 0.069 and w R = 0.167, S = 1.05,（Δρ）max = 0.20 and（Δρ）min =-0.22 e·A^1-3. The fluorescence of the product is discussed.
文摘The global landscape of the twenty-first century is increasingly shaped by an intricate web of interconnected crises.Such a system of crises—the polycrisis—is characterized by mutual amplification of nested and intertwined risks and requires novel approaches to analysis,assessment,and governance.
基金This work was supported by the Research Fund of the State Key Laboratory of Solidification Processing(NWPU),China(No.136 QP-2015)the Key Scientific and Technological Innovation Research Team of Shaanxi Province(No.2022TD-31)+2 种基金the Key R&D Program of Shaanxi Province(No.2021ZDLGY14-04)the National Training Program of Innovation and Entrepreneurship for Undergraduates(No.XN2022023)the Joint Funds of the National Natural Science Foundation of China(No.U21B2067).
文摘In the thriving fields of thermal management fields,ceramic films with superior thermal insulation and excellent mechanical properties are in high demand.Nevertheless,the fabrication of ceramic films that combine both mechanical performance and low thermal conductivity remains highly challenging.Herein,we report a dual-phase Si_(3)N_(4) nanowire-boron nitride(BN)nanosheet(SNB)with an intertwined structure,where BN nanosheets are firmly intertwined on the surface of Si_(3)N_(4) nanowires.The results demonstrate that the SNB film possesses exceptional mechanical properties,with a tensile strength of 5.25 MPa,representing a 127% improvement over the Si_(3)N_(4) nanowire film(SN)without BN nanosheets incorporation.Simultaneously,benefiting from the interface and cross-linking nodes formed between Si_(3)N_(4) nanowires and BN nanosheets,the thermal conductivity of the SNB film is as low as 0.043 W·m^(–1)·K^(–1),marking a 23% reduction compared to the SN film without BN nanosheets.Furthermore,the all-ceramic component characteristic endows the SNB film with high temperature resistance up to 1200℃.The combination of high strength,low thermal conductivity,and high-temperature resistance enables the SNB film a promising candidate for applications in high temperature environments.
基金supported by National Natural Science Foundation of China(Grant Nos.11101269 and 11431010)
文摘In this paper, for a vertex operator algebra V with an automorphism g of order T, an admissible V-module M and a fixed nonnegative rational number n ∈1/T Z_+, we construct an A_(g,n)(V)-bimodule Ag,n(M) and study its properties, discuss the connections between bimodule A_(g,n)(M) and intertwining operators. Especially, bimodule A _(g,n)-1T(M) is a natural quotient of A_(g,n)(M) and there is a linear isomorphism between the space IM^k M Mjof intertwining operators and the space of homomorphisms HomA_(g,n)(V)(A_(g,n)(M) A_(g,n)(V)M^j(s), M^k(t)) for s, t ≤ n, M^j, M^k are g-twisted V modules, if V is g-rational.
文摘The author constructs unitary intertwiners for degenerate C*-algebraic universal principal series of SL(n + 1) over a local field by explicitely normalizing standard intertwining integrals at the level of Hilbert modules.
文摘This paper traces the genealogy of reversibility,chiasma,and chiasme in Merleau-Ponty's writings and offers a new characterisation of his later ontology in terms of a multi-layered chiasme-focused topology informed by subtle differences and interconnections among these notions.We need to grasp the significance of reversibility not only in terms of constant recoil and impossible overlap but also of its situatedness in the crisscrossing between Dasein and things,and between the inside/invisible and the outside/visible."Chiasma" was initially introduced as a reference to the intersection of perspectives.Merleau-Ponty deploys it to articulate macroscopic insights concerning the nature of philosophy and the interweaving connections between self,other,and the world.In comparison,"reversibility" is primarily used to describe the microscopic bond between touching-touched and perceiving-perceived.I argue that,as Merleau-Ponty's ultimate choice of wording,"chiasme" incorporated the significance of both "reversibility" and "chiasma." A chiasme-focused topology that retains the significance of all three of the terms would serve to better convey the import of Merleau-Ponty's later ontology,which aims to dissolve and to re-configure our conceptions about being,body,self,and the other from within and from below.
文摘In this paper we consider the Heckman-Opdam-Jacobi operatorΔ_(H J)on R^(d+1).We define the Heckman-Opdam-Jacobi intertwining operator V_(H J),which turns out to be the transmutation operator betweenΔ_(H J)and the LaplacianΔ_(d+1).Next we construct^(t)V_(H J)the dual of this intertwining operator.We exploit these operators to develop a new harmonic analysis corresponding toΔ_(H J).
文摘We consider the tensor product π_α ? π_βof complementary series representations π_α and π_β of classical rank one groups SO_0(n, 1), SU(n, 1) and Sp(n, 1). We prove that there is a discrete component π_(α+β)for small parameters α and β(in our parametrization). We prove further that for SO_0(n, 1) there are finitely many complementary series of the form π_(α+β+2j,)j = 0, 1,..., k, appearing in the tensor product π_α ? π_βof two complementary series π_α and π_β, where k = k(α, β, n) depends on α, β and n.
基金supported by the National Key Research and Development Plan(2018YFC1002900)the Research and Development Projects in Key Areas of Guangdong Province(2019B020227001)。
文摘The rate of multiple pregnancy is increasing, mainly because of the widespread use of assisted reproduction techniques and families’ desire for twins. Twin pregnancy accounts for a higher risk of chromosomal abnormalities, structural malformations, and neonatal adverse events than singleton pregnancy. The presence of artery-vein anastomoses, unbalanced placenta sharing, and abnormal cord insertion in monochorionic twins is associated with twin complications such as twin-to-twin transfusion syndrome, selective intrauterine growth restriction, and twin anemia polycythemia sequence. Although many guidelines and studies have established and improved the processes about the antenatal surveillance and management of twin pregnancy, they also raise more controversies and challenges. This review aims to highlight the international consensus on the antenatal care of twin pregnancies and analyze the controversies and predicaments based on the published International Federation of Gynecology and Obstetrics guidelines and research.
文摘To the east of Fuzhou,capital of Fujian Province in southeast China,stands a verdant mountain known as Kuliang.In the mid-19th century,many international vips settled in the city.Kuliang rose to fame as a beloved summer retreat,attracting expatriates who had made Fuzhou their home.For nearly a century,foreign and local residents lived together in harmony,and Kuliang blossomed into a unique international community where Eastern and Western cultures intertwined.
