光纤光栅和环形器组成的光分插复用器同频串扰特性研究

对三种不同结构的光纤光栅和环形器组成的光分插复用器的同频串扰进行了实验研究。实验表明，与常规的I型结构光分插复用器相比，Ⅱ型和Ⅲ型结构中由上载端泄漏到下载端的同频串扰分别减少了24．4dB和39．3dB，由下载端泄漏到上载端的同频串扰分别减少了23．6dB和24．6dB。     

Chain decompositions of ordered semigroups

Characterizations of ordered semigroups which can be decomposed into (natural ordered) chains of ω -simple ordered semigroups are given, where ω -simple ordered semigroups are ξ _l (ξ _t ) -simple, left (t -) simple, L _n (H _n ) -simple, l (t )-archimedean and nil-extensions of left (t -) simple ordered semigroups, respectively. As a generalization of the theory of Clifford semigroups (without orders) to ordered semigroups, ordered semigroups which are semilattices of t -simple subsemigroups are characterized.     

物理教学中应调动学生的“五官”感受领悟物理学中的“美”

根据新课标的精神及自己的教学实践，提出了在物理教学中应充分调动学生的“五官”感受，让他们领悟物理学中的“美”，提高物理学习的兴趣与热情。     

半群上Rees矩阵半群的半格的结构

推广了Ｍ．Ｐｅｔｒｉｃｈ在文［１］中所用的方法，得到了幺半群上Ｒｅｅｓ矩阵半群的半格的一个结构定理．研究了单幂幺半群上Ｒｅｅｓ矩阵半群的半格的性质并给出了矩形单幂幺半群的半格的若干等价刻划．     

计算常用广义逆的一类统一的迭代法

本文给出了计算广义逆的一阶与ｐ阶（ｐ≥２）迭代法。由于常用的重要广义逆，例如Ａ＋，，Ａ（ｄ），Ａ＃，Ａｄ，ｗ，，等等，都是　型的广义逆，所以，我们实际上给出了计算这些重要广义逆的一类统一的迭代法。此外，我们还研究了计算的迭代法中初始逼近的一般取法，以及计算上述各个广义逆的迭代法中初始逼近的实际取法。     

Generalized affine transformation monoid of a free module of finite rank over finite chain rings

Let R be a finite commutative chain ring, n a positive integer and R ⁿ the free R-module of rank n consisting of column vectors over R. The generalized affine transformation monoid Gaff _n (R) of R ⁿ is introduced, then Schützenberger groups of -classes, principal factors and group -classes of the monoid Gaff _n (R) are investigated. As corollaries, basic numerical information of Gaff _n (R) is given.     

Nil-extensions of simple po-semigroups

In this paper, we generalize the concepts of (intra-, left, right, completely) π-regular semigroups without order to po-semigroups and discuss characterizations and relationships concerning them. Moreover, we introduce the concepts of nil-extensions of po-semigroups first, then consider properties and characterizations of po-semigroups which are nil-extensions of (left, rightt-) simple (π-regular) po-semigroups and complete semilattices of this class of po-semigroups.     

Interaction between Xanthoxylin and Bovine Serum Albumin

在模拟生理条件下,采用荧光光谱法、圆二色光谱法和红外光谱法研究了花椒油素(XT)与牛血清白蛋白（BSA）的相互作用。结果表明花椒油素与牛血清白蛋白之间发生动态和静态联合猝灭,二者间的的猝灭常数(K)在286, 298和310 K分别为3.31 × 105, 到2.03 × 105 和 0.94 × 105 L∙mol-1. 热力学参数表明, 花椒油素与牛血清白蛋白间以疏水作用力为主。圆二色光谱和红外光谱法表明加入花椒油素后,牛血清白蛋白的二级结构发生了变化,其中α-螺旋减少了3.9%。另外,我们还研究了共存离子对两者结合的影响。     

A solvothermal synthesis and characterization of a new open-framework K4Ag2Ge3S9·H2O

A novel framework K₄Ag₂Ge₃S₉·H₂O was synthesized solvothermally in the presence of a chelating agent of HSCH₂CH(SH)CH₂OH. Its structure was determined by single-crystal X-ray diffractometry. This material crystallizes in the orthorhombic space group Pna2(1) (No. 33) with a=14.4524(4) Å, b=9.6339(3) Å, c=16.5636(9) Å, z=4, R₁=0.0292, wR₂=0.0624 for all data. The structure comprises of adamantane-like clusters [AgGe₃S₉]⁵⁻ linked by Ag+ ions to form a open-framework, and potassium ions and water molecules are located in the channels. Its IR and thermal properties were investigated.