Analytic Calculation of Arbitrary Matrix Elements for Boson Exponential Quadratic Operators

By means of the transformation relation between the ordinary form of boson exponential quadratic operators (BEQO) and its anti-normal product form, we present an effective method to conveniently calculate arbitrary matrix elements of BEQO. By this method, many important matrix elements can be calculated analytically. As a direct application, we obtain the exact solutions of the density matrix and partition function for general boson quadratic Hamiltonian without any information about the energy level.     

空间因素对敏化剂性质的影响

本文介绍了一种新的敏化剂cis-(NCS)₂-bis(2,2′-bipyridyl-3,3′-dicar-boxylate)ruthenium(Ⅱ)的合成,测定了它的吸收光谱及氧化还原电位,并将这种染料吸附到具有大比表面的TiO₂纳晶电极上测量它的光电转换效率。另外,参照文献分别合成出cis-(NCS)₂-bis(2,2′-bipyrdyl-4,4′-or 5,5′-dicarboxylate)Ru(Ⅱ)染料,测定它们的光电及光物理性质并以此为依据讨论了空间因素对敏化剂性质的影响。     

The Hopf Algebraic Structure of q-Deformed Heisenberg Algebra when q Is a Root of Unity

We show that the q-deformed Heisenberg algebras have not the Hopf algebraic structure when q take generics values, but when q is a root of unity, there exist Hopf algebraic structures in the q-deformed Heisenberg algebras.     

Poisson-Lie Structure of O(3)-σ Model in Terms of Moving Local Frame

We discuss the Poisson-Lie structure of the integrable nonlinear O(3)-σ model in terms of moving local flame. The corresponding T, s matrices are given out explicitly. The fielddependent terms in r, s matrices appear to be associated with the Riemannian connection of the target manifold.     

The Imaginary Parts of Two-Loop Self-Energy in ITF and RTF

The imaginary parts of φ⁴ two-loop self-energy are investigated in both imaginary and real time finite-temperature formalisms (ITF and RTF). The two results are showed to be different, their relation is obtained, and the physical interpretation is discussed respectively.     

NUCLEAR EFFECT ON THE NUCLEON STRUCTURE FUNCTIONS AND HIGH PT JET PRODUCTION IN p-Fe COLLISIONS

Using the empirical formula on F^N(Fe)/F^N(D) found by us and generalizing the method used by CERN UA1 Collaboration in analysing the process p+Fe→2jet+X,a simple method to calculate p+Fe→2jet+X process is presented.Our results are compared with experimental data and other theoretical results.Some results are to be checked by future experiments.     

NOETHER AND TOPOLOGICAL CHARGE OF GAUGE FIELD

"Electric" chaise currents with gauge-dependent isotopic axis are gauge invariant Noether currents. These currnnts include themselves the contribution of gauge field. "Magrnetic" poles are related to the topologically nontrivial orientation of isotopic axis. The dual symmetry trans-forms a known conserved current into infinitely many ved currents. The induced Noether charges of vacuum different chiral boundary condition and the topological background charges always compensate each other.     

聚吡咯-肝素共聚膜修饰电极对钙离子的响应

研制了聚吡咯-肝素共聚膜修饰电极,并用电化学方法进行了表征。发现该修饰电极对钙离子呈Nernst响应,电极斜率为31.0 mV/pCa,线性范围是5.0×10^-7～5.0×10^-2 mol·L^-1,可用于儿童发样中钙的测定,结果满意,还测定了该修饰电极对其他阳离子的电位选择系数。     

NONEQUIVALENT SU(2) GAUGE POTENTIALS UNDER EQUAL FIELD STRENTHS AND SOURCES

This paper analyses some common physical characteristics of the gauge field strengths and sources with unequivalent potentials and expresses it in geometrical terms. The eigen-directions of these fields and sources form twistfree curve congrence, which has orthogonal hypersurfaces. The field is Abelianlizable (frequently, even trival) on each hypersurface, i.e. there exists Higgs field, which is invariant under translation along each hypersurface. The gauge field and sources are not altered during the variation of potentials, generated by the gauge rotation around Higgs fields with equal angles on each individual hypersurface but with unequal angles on different hypersurfaces.     

新型冠状病毒感染疫情下公众心理健康及影响因素研究进展

新型冠状病毒感染疫情是重大突发公共卫生事件,对全球公共心理健康产生了深远影响.本文对公众心理健康状况、影响心理健康水平的疫情因素(新型冠状病毒感染、隔离、失业和其他应激源)以及个人因素(青少年、女性、医护人员和既往有躯体/精神疾病史)进行综述,并从个人、社会、国家层面分析改善公众心理健康的对策,为应对疫情的长期影响提供参考.