A Fedosov Star Product of the Wick Type for Kähler Manifolds

In this Letter we compute some elementary properties of the Fedosov star product of Weyl type, such as symmetry and order of differentiation. Moreover, we define the notion of a star product of the Wick type on every Kähler manifold by a straightforward generalization of the corresponding star product in Cn: the corresponding sequence of bidifferential operators differentiates its first argument in holomorphic directions and its second argument in antiholomorphic directions. By a Fedosov type procedure, we give an existence proof of such star products for any Kähler manifold.     

Hot Strange Hadronic Matter in an Effective Model

An effective model used to describe the strange hadronic matter with nucleons, Λ-hyperons, and Ξ-hyperonsis extended to finite temperature. The extended model is used to study the density, temperature, and strangeness fractiondependence of the effective masses of baryons in the matter. The thermodynamical quantities, such as free energy andpressure, as well as the equation of state of the matter, are given.     

SOFM星三角聚类的星图识别算法

介绍了一种利用SOFM(自组织特征映射)网络的聚类功能进行全天星图识别的算法。应用C 软件编程，对全天导航星星表的星信息进行了星三角采样、分类，指出SOFM网络可以很好地提取、反映星表中的复杂信息。从实际观测星图的识别结果可以看出该算法能在中型以上视场的星图识别中发挥很好的作用，虽然识别时间比三角形算法长了些，但其抗噪能力远超过任何其他方法。     

一个电张弛振子中的瞬态激变

报道一例映孔导致激变后发生的奇异排斥子的拓扑突变.这种突变以其分数维的突变为标志 ，并引起激变后长混沌瞬态运动行为的突变，因而应该具有基础理论和实践上的重要意义. 关键词： 激变 奇异排斥子 混沌瞬态     

差之毫厘,失之千里--星球参考系与质心参考系的差异

分析了星球参考系与质心参考系的差异.     

关于矩阵的Sharp序、*序和减序

给出短阵sharp序的一个新的刻画，由此得到(半)正定短阵sharp序与其平方矩阵sharp序之间的关系．我们还讨论正规矩阵的*序与减序之间的关系，推广了关于Hermmite矩阵的相应结果．     

ABCD 4‐miktoarm star quarterpolymers using click [3 + 2] reaction strategy

Two samples of ABCD 4‐miktoarm star quarterpolymer with A = polystyrene (PS), B = poly(ε‐caprolactone) (PCL), C = poly(methyl methacrylate) (PMMA) or poly(tert‐butyl acrylate) (PtBA), and D = poly(ethylene glycol) (PEG) were prepared using click reaction strategy (Cu(I)‐catalyzed Huisgen [3 + 2] reaction). Thus, first, predefined block copolymers of different polymerization routes, PS‐b‐PCL with azide and PMMA‐b‐PEG and PtBA‐b‐PEG copolymers with alkyne functionality, were synthesized and then these blocks were combined together in the presence of Cu(I)/N,N,N′,N″,N″‐pentamethyldiethylenetriamine as a catalyst in DMF at room temperature to give the target 4‐miktoarm star quarterpolymers. The obtained miktoarm star quarter polymers were characterized by GPC, NMR, and DSC measurements. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 1218–1228, 2008     

Method of determining the absolute molecular weight from gel permeation chromatograms for star‐shaped styrenic block copolymers

A gel permeation chromatography (GPC) calculation method has been developed to determine the absolute molecular weight of a star‐shaped styrenic block copolymer with GPC–ultraviolet/refractive index calibrated with linear polystyrene standards. To illustrate the simplicity of this method, we have synthesized nearly monodisperse, multiple‐arm model polymers either by linking living polymeric arms with multifunctional silicon halide or by oligomerizing the p‐chloromethylstyrene‐terminated polystyrene macromonomers. The good agreement between the absolute molecular weight determined with this calculation method and that actually measured with a multi‐angle laser light scattering device has corroborated the validity of the calculation method. © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 41: 976–983, 2003     

Star‐shaped poly(L‐lactide)s with variable numbers of hydroxyl groups at polyester arms chain‐ends and directly attached to the star‐shaped core—Controlled synthesis and characterization

Star‐shaped poly(L ‐lactide)s (PLAs) bearing variable numbers of secondary hydroxyl groups at linear arms chain‐ends and primary hydroxyl groups directly attached to dipentaerithritol core (DPE) ((HO)_6?xDPE(PLA‐OH)_x, where x = 1–6) were prepared and then analyzed by means of size exclusion chromatography (SEC), ¹H NMR spectroscopy, MALDI‐TOF mass spectrometry, and eventually by Liquid Chromatography at Critical Conditions (LC‐CC). First, starting from DPE(OH)₆ a series of polyols with various number of hydroxyl groups has been obtained ((BnO)_6?xDPE(OH)_x, where Bn denotes benzyl moiety and x = 1–6). The living ring‐opening polymerization of L ‐lactide (LA) with (BnO)_6?xDPE(OH)_x/tin(II) octoate mixtures as initiating and catalytic system led to star‐shaped (BnO)_6?xDPE(PLA‐OH)_x polymers with molar masses (M_n) controlled by LA and DPE concentrations ratio in the feed. Finally, deprotection (via hydrogenation) gave a series of (HO)_6?xDPE(PLA‐OH)_x PLA's. SEC (with Multiangle Laser Light Scattering Detector (MALLS)), NMR, and MALDI‐TOF analyses confirmed the assumed structures and M_n's of the prepared (BnO)_6?xDPE(PLA‐OH)_x and (HO)_6?xDPE(PLA‐OH)_x PLA's. LC‐CC measurements revealed that for (BnO)_6?xDPE (PLA‐OH)_x series the elution volumes increase monotonically with the increasing number of –PLA‐OH arms in one macromolecule and are independent on the given PLA molar mass because of the critical conditions. Contrary to the polymers having the protected core hydroxyl groups, the elution volume for (HO)_6?xDPE(PLA‐OH)_x series decreases with the increasing number of ‐PLA‐OH arms reaching a minimum value for 4‐arm PLA and then slightly increases for 5‐ and 6‐arm PLA. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 6116–6133, 2005     

以完全二部图作为星补的正则图的刻画

设$G$是一个$n$阶图, $\mu$是$G$的一个$(k\ge 1)$重邻接特征值. 图$G$中关于$\mu$的星补$H$是指$G$的不含特征值$\mu$的$n-k$阶诱导子图,且顶点集$X=V(G-H)$称为图$G$中关于$\mu$的星集.星补技术提供了利用部分子结构来重建满足特定性质的整个图的谱工具. 本文我们研究了关于特征值$\mu$的以$K_{t,s}~(s\ge t\ge 2)$作为是补的正则图, 特别地, 我们完全刻画了$t=3$的情形, 获得了当$t=s$时的一些性质, 并提出了有待进一步研究的问题.