一阶拟线性椭圆型复方程的广义DC型边值问题

研究了一般的一阶拟线性椭圆型复方程的边界条件中含有斜微商的广义Carleman型边值问题。采用直接将广义DC型问题化为奇异积分方程的方法析出特征部分，然后通过对特征方程的研究得到了广义DC问题的可解条件和计算指标。     

一类椭圆组的Riemann-Hilbert问题

讨论一阶椭圆组的Riemann-Hilbert问题，并证明了解的存在性。     

一类四阶椭圆型方程的极值原理

应用Hopf极值原理，对四阶椭圆型方程△^2u h(x，u，△u)=0及其边值问题进行研究，给出解的泛函的极值原理，并证明了在一些边界条件下解恒为零．同时推广了R．P．Sperb于1981年出版的极值原理及其应用中第十章的结果。     

关于方程—△u＋f（x，u）＝h的一个新结果

该文研究二阶半线性椭圆型方程 -Δu+ f(x ,u) =h的Dirichlet问题弱解的存在性和唯一性。采用同胚的观点把问题转化为非线性算子 -Δ+ f(x ,·)的延拓性。用延拓方法得到了关于解存在的一个充分必要条件和解唯一的一个充分条件。这些条件是整体积分形式的。该研究不但是用了新的方法 ,而且在一定程度上推广了前人的结果     

水解法制备高吸水腈纶正交实验

对腈纶纤维的水解工艺进行研究．正交实验结果表明，实验范围内，水解时间是影响腈纶纤维吸水率的关键因素，随着时间的延长，吸水率增加；水解温度80℃时吸水率较高；NaOH浓度对水解腈纶的吸水率也产生较大的影响．温度、时间和NaOH浓度都会对纤维白度产生影响．     

RELAP5分析非能动堆芯应急冷却系统实验结果

先进压水堆的一个显著特点是非能动系统的高可靠性，评价这些系统的运行特性以及系统分析程序如RELAP5等的计算能力是非常重要的，用RELAP5／MOD3.2程序对非能动堆芯应急冷却系统实验过程进行了模拟分析，通过计算结果与实验结果的比较，初步评价了RELAP5／MOD3.2程序的计算能力。     

光纤Bragg光栅传感器在土木工程中的应用

在介绍了光纤Bragg光栅传感器的基本原理和解调方法后，对光纤Bragg光栅传感器在土木工程中的国内外的应用作了详细的综述，探讨了光纤Bragg光栅传感器用于土木工程检测时的一些关键问题，指明了其广阔的应用前景。     

Technical Breakthroughs in the Construction of TGP

1Introduction　TheThreeGorgesProject(TGP)isavitalbackboneprojectinthedevelopingandharnessingoftheYangtzeRiver.Asamulti purposehydro developmentprojectthatcanproducecomprehensivebenefitsmainlyinfloodcontrol,powergenerationandnavigationimprovement,TGPwillexertasignificantimpactonthenationalsocio economicdevelopmentofChinaafteritscompletion .Withthenormalpoollevel (NPL)at1 75m ,thereservoirhasatotalstoragecapacityof39 3billionm3 .Theprojectiscom posedofadam ,twopowerplantsandnavigationfacil…     

Pb isotopic geochemical study on the crustal structure of Tongbaishan

Pb isotopic composition of the Tongbai complex, distributed in the Tongbaishan to the west of the Dabieshan, ranges between the Dabie core complex and the Dabie ultral-high pressure (UHP) metamorphic complex, the latter having more radiogenic Pb isotopic composition than the former. Granites from the Jigongshan pluton, which intruded mainly into the Tongbai complex, are distinct from the Tongbai complex but similar to the Dabie core complex in Pb isotopic composition, showing that the magma of the Jigongshan granites was derived from the partial melting of the Dabie core complex. According to Pb isotopic compositional variation model in the vertical crustal section and magma source from the Jigongshan pluton, it is suggested that the Tongbai complex was an upper rock serial of the Dabie core complex, which is beneath the Dabie UHP metamorphic complex in the crustal structure of the Tongbai-Dabie orogenic belt. The Tongbai complex was not well preserved in the Dabie area due to the high exhumed crustal section. However, the crustal section in the Tongbai area was exhumed less than that in the Dabie area, and the deep crust in the Tongbai area still contains the basement composition similar to the Dabie core complex. Therefore, the crustal basements from the Dabie to Tongbai areas are united. The present distribution of the basement blocks in different locations of the Tongbai-Dabie orogenic belt reflects different exposure of the crustal section.     

活性炭纤维的表面功能设计和控制(Ⅰ)

文章系统阐述了活性炭纤维 (ACF)表面功能的设计和控制方法 ,介绍了ACF的比表面积、孔径分布、表面化学结构与吸附对象的关系;从ACF表面物理、化学结构的可设计化入手 ,全面阐述了ACF物理结构的设计和控制方法及表面化学的改性方法;并介绍了其应用效果