Two-dimensional photon counting imaging detector based on a Vernier position sensitive anode readout

A two-dimensional photon counting imaging detector based on a Vernier position sensitive anode is reported. The decode principle and design of a two-dimensional Vernier anode are introduced in detail. A photon counting imaging system was built based on a Vernier anode. The image of very weak optical radiation can be reconstructed by image processing in a period of integration time. The resolution is superior to 100 μm according to the resolution test. The detector may realize the imaging of very weak particle flow of high-energy photons, electrons and ions, so it can be used for high-energy physics, deep space exploration, spectral measurement and bio-luminescence detection.     

A Remark on the Cauchy Problem of 1D Compressible Navier-Stokes Equations with Density-dependent Viscosity Coefcients

This paper is concerned with the Cauchy problems of one-dimensional compressible Navier-Stokes equations with density-dependent viscosity coefcients.By assumingρ0∈L1(R),we will prove the existence of weak solutions to the Cauchy problems forθ0.This will improve results in Jiu and Xin’s paper(Kinet.Relat.Models,1(2):313–330(2008))in whichθ12is required.In addition,We will study the large time asymptotic behavior of such weak solutions.     

Supersymmetric invariance and universal central extensions of lie supertriple systems

In this article, we discuss some properties of a supersymmetric invariant bilinear form on Lie supertriple systems. In particular, a supersymmetric invariant bilinear form on Lie supertriple systems can be extended to its standard imbedding Lie superalgebras. Furthermore, we generalize Garland's theory of universal central extensions for Lie supertriple systems following the classical one for Lie superalgebras. We solve the problems of lifting automorphisms and lifting derivations.     

Hom-Leibniz Superalgebras

We gived the definition of Hom-Leibniz superalgebra and studied its basic properties. In particular, the derivations of Hom-Leibniz Superalgebras are portrayed in detail.     

基于GARCH模型的短期汇率预测

研究人民币对美元的汇率预测,通过对2010年7月1日至2013年11月30的周汇率平均值进行数据分析,发现其基本符合时间序列分析中的GARCH模型,因此采用该模型进行预测,预测结果比较成功。预测表明人民币呈现升值的趋势.     

微分中值定理的应用及推广

介绍应用微分中值定理时,构造所需辅助函数的两种有效方法：观察法和解微分方程法。并通过变量代换法化无限为有限,将罗尔定理的应用推广到无限区间上。     

给定悬挂点数的双圈图中具有最小Hosoya指数的图

Let G be a graph. The Hosoya index Z（G） of a graph G is defined to be the total number of its matchings. In this paper, we characterize the graph with the smallest Hosoya index of bicyclic graphs with given pendent vertices. Finally, we present a new proof about the smallest Hosoya index of bicyclic graphs.     

优化公交车调度的多目标遗传算法模型

公交车是为市民出行提供服务的“准公共”产品,它反映了一个城市的管理水平。研究如何合理规划公交车的调度是一个至关重要的问题。针对由于公交客流量易受天气影响、不同时间段客流量及其变化程度相差较大等问题,本文提出了基于“平高峰”因素的多目标遗传算法对城市公交调度进行优化。模型由三个阶段构成,首先本文根据客流数据对公交的“平高峰”阶段进行定义,并验证其合理性;然后利用乘客在站等待时间与公交的各方面成本建立以乘客出行成本和公共交通的运行成本最小的公交调度优化模型。最后将“平高峰”融入至染色体基因序列中,利用多目标遗传算法不断迭代计算出最优公交调度方案。对比结果表明,基于“平高峰”优化后的模型较于传统算法的乘客出行成本降低了13.75%且公共交通的运行成本减少1.7%,均优于传统算法。证明该方法对优化公交调度的有效性。     

多核季胺盐类功能分子筛模板剂的合成

以1,6-己二醇,二正丙胺和三正丙胺为原料,合成了长链双核季铵盐和三核季铵盐功能MFI型分子筛模板剂,其结构经13C NMR和IR表征.     

微放电检测方法分析

首先分析了微放电的影响,指出了微放电检测的重要性。总结了现有的微放电检测方法,并对其进行分析,结合工程实践总结了各种检测方法的优缺点及适用范围。最后,总结分析了微放电检测方法,并指出了微放电检测方法的研究趋势。