Control of group velocity in an annular chain of microring coupled-resonator optical waveguides

In order to control group velocity,an annular chain of microring coupled-resonator optical waveguides was analyzed,and its transmission spectra were obtained using the transfer matrix method. The result showed that the curvature of the chain caused the dispersion curves to shift and the resonance fre-quency got fixed. It is therefore concluded that the group velocity of light in the annular chain of mi-croring coupled-resonator optical waveguides can be controlled by adjusting the curvature of the chain. We believe that such an annular chain can be used as an optical buffer or signal retarder for optical communication.     

Wavelet Numerical Solutions for Weakly Singular Fredholm Integral Equations of the Second Kind

Daubechies interval wavelet is used to solve numerically weakly singular Fredholm integral equations of the second kind. Utilizing the orthogonality of the wavelet basis,the integral equation is reduced into a linear system of equations. The vanishing moments of the wavelet make the wavelet coefficient matrices sparse,while the continuity of the derivative functions of basis overcomes naturally the singular problem of the integral solution. The uniform convergence of the approximate solution by the wavelet method is proved and the error bound is given. Finally,numerical example is presented to show the application of the wavelet method.     

锆钛酸铅压电陶瓷材料凝胶注模成型

为制备凝胶注模成型所需的高固相低粘度的锆钛酸铅陶瓷浆料,分别用分散剂聚甲基丙烯酸铵和柠檬酸三铵进行试验.研究了分散剂聚甲基丙烯酸铵、浆料pH值和固相含量对浆料粘度的影响,实验结果表明该分散剂最佳用量为陶瓷粉体质量分数0.30%~0.45%、浆料最佳pH值8.5~11.0,此时可制备体积分数50%、粘度小于1 Pa.s,适于凝胶注模的稳定锆钛酸铅浆料.其中当分散剂质量分数为0.30%时,烧结陶瓷有较好的微观结构.同时,对干压成型中不同粘合剂的作用效果进行了比较.     

一种实对称矩阵特征值的求法

运用正交相似变换将实对称矩阵约化为不可约对称三对角矩阵,依不可约对称三对角矩阵特征值的隔离性质,构造出具有分段严格单调性的等价模型,证明在每一单调区间内有且仅有一个根,并采用具有二次收敛的Newton迭代法求解.最后,给出了算法及算例.     

生态弹性填料及陶粒在微污染水体处理中的应用研究

生态弹性填料是一种模拟天然水草形态加工而成的新型水处理材料，近年来在污水处理中得到了广泛应用。其具有比表面积大、去除有机物容积负荷高、生物附着性好、空隙可变、不易堵塞、适应性强、操作管理简便等优点；陶粒具有较高的孔隙率及适中的密度，所有这些都有利于微生物的生长。本文采用人工湿地作为构筑物对崇明前卫生态村中心湖的水体进行处理，结果表明，经此工艺处理后的水体，CODCr、TP、TN、氨氮等指标达到或优于国家三类水质标准。并为工程实施提供了科学依据。     

2*2上三角算子矩阵的谱的填洞问题

设Mc=(A C 0 B)∈B(X( )Y)为定义在Banach空间X( )Y上的上三角算子矩阵.讨论了Mc的左(右)谱σl(σr),左(右)本性谱σle(σre)和本性谱σe的填洞问题.     

陶瓷造型设计中形式美的表现和应用

形式美的基本内容比较丰富,表现形式也多种多样.陶瓷工艺美术品,质高形美,不仅具有实用价值,更具有审美价值,因此在进行陶瓷造型设计时,要加强形式美在陶瓷产品中的运用.本文较详细阐述了形式美的基本规律和它在陶瓷造型设计中的表现与应用.     

微型点阵打印机曲线绘制程序设计

着重分析了微型点阵打印机点阵图样打印输出功能，详细介绍了为其扩展二维曲线绘制功能的软件程序设计方法，为今后更好地应用该型号打印机奠定了基础。     

Coordination Model Research Based on Command Decision Joint Intension

Command Decision Simulation （CDS） is not only an important and difficult issue in the field of simulation, but also a technique issue to be tackled in the course of collective Modeling and Simulation in Joint Operations Experiment Center. CDS can give support to all kinds of simulation. Using computer to realize the Blue side＇s command deci- sion automatic execution in the operation training simulation system can improve training effect. Using computer to realize the lower level command unit＇s automatic command deci- sion can help to reduce the number of controllers and release them from heavy work. It can also enlarge simulation scale and increase the freedom of the simulation entity especially the command entity, thus enhance the authenticity and credibility of the simulation. Ac- cording to the command decision structure and the Joint Intention Theory, the thesis puts forward the method of making use of Coordination Matrix （CM） to realizing cooperation among the entities in CDS and constructs the calculation sketch of Task Execution, Task Monitoring and Task Replanning. At the same time, the thesis brings forward the CDS structure vision based on Partial Global Planning（PGP）. As CM is an indispensable part of combat simulation, the theory and the method of CDS will become an important part for the theory of Combat Simulation.     

CONSTRUCTING R-MATRICES AND SOLUTIONS OF THE YANG-BAXTER EQUATION BY COMPUTER ALGEBRA(Ⅰ)

给出用计算机代数系统Ｍａｔｈｅｍａｔｉｃａ建立约束系统的Ｒ矩阵的统一方法，并将其用于ＣＢ族和ＴＧ族的Ｒ矩阵