带堆焊层钢管焊接接头耐蚀性的电化学评定

采用电化学测试技术评价了低碳钢管管端内壁不锈钢焊条堆焊后再用相同焊条进行打底焊所得焊接接头（特别是焊接热影响区）的耐蚀性，选用两种高合金焊条M2、M6，并对堆焊金属进行热模拟试验，测定了模拟热影响区不同部位在3％NaCl介质中的阳极极化行为．结果表明，按新工艺焊接的接头代替普通碳钢焊接接头可有效地提高管道接头的使用寿命．两种焊条中，含Nb的M2耐蚀性比M6好，铌能够有效提高接头的耐均匀腐蚀、晶间腐蚀和点蚀能力，热影响区600～1000℃是高合金接头耐蚀性最薄弱的区域，建议采用超低碳含铌高合金焊条，以解决热影响区的腐蚀问题．     

线性方程组解的判定定理和结构定理

给出了不同于一般高等代数教科书中线性方程组解的判定定理和结构定理．     

Synthesis of glucoside compounds of ferrocenyl phenols and their antianemic activity

Six glucoside compounds have been synthesized by means of phase-transfer catalytic method and deacetylation from the starting material ferrocene. Their structures have been confirmed by elementary analysis, IR,¹HNMR and MS. The antianemic activities of some compounds have also been tested. Results indicate that these glucoside compounds possess the antianemic activities and therefore, the further study is well worth making. Supported by the foundation of Wuhan Metropolis Commission of Science and Technology Liu Huiying: born in 1937, Professor     

Studies on a series complexes of copper (II), zinc (II), cobalt (III) with Schiff base derived fromd-glucosamine and salicylaldehyde

Copper (II) zinc (II) cobalt (III) complexes with the Schiff base derived from salicylaldehyde andd-glucosamine were synthesized. These compounds abbreviated as SG, CuSG, ZnSG, CoSG were characterized by elemental analyses, IR, UV-Vis,¹H NMR and MS spectrum. ESR spectrum, magnetic susceptibility measured by Evans method for CuSG had also been done. It is suggested that the complexes in solution have pseudotetrahedral structure. It was found that SG would occur a photochemical reaction if a beach of 355 nm ultravisible light shone on its aqueous solution. The reaction was in further research. Supported by the National Natural Science Foundation of China Ye Yong: born in 1970, Ph. D graduate student     

浑沌时间序列建模及其分析

介绍最新提出的浑泡时间序列建模及预测的理论和方法，给出了应用实例，并将其与传统的时间序列建模方法做了多方面的比较，最后提出了浑沌时间序列建模有待深入研究的几个问题．     

变阶分数次积分的变阶Lipschitz性质

用Ｐｒ（ｆ）（ｘ）表ｆ（ｘ）的Ｐｏｉｓｓｏｎ积分，对ｎ维球面Ωｎ上的变阶分数次积分     

关于半连续格范畴

构造了一类新的保持半连续格结构的映射，进而得到了意义更广泛的连续格格范畴。     

大豆叶片衰老过程中半胱氨酸蛋白酶基因的特异性表达

用反转录和多聚酶链反应（ＲＴ－ＰＣＲ）和琼脂糖凝胶电泳方法对大豆叶片衰老过程中半胱氨酸蛋白酶基因的表达情况进行了研究，发现由ＰＣＲ扩增出的ｃＤＮＡ带谱会随着叶片的不断衰老而发生较明显的改变，初步证明，至少有一条ｃＤＮＡ带为绿叶样品所特有，另外，两条ｃＤＮＡ带则为衰老叶片样品所特有，该实验结果为进一步分离大豆叶片衰老时特异表达基因及其启动子和最终实施转基因工程奠定了基础。     

协同科学——从“协同学”到CSCW

计算机支持的协同工作（ｃｏｍｐｕｔｅｒｓｕｐｐｏｒｔｅｄｃｏｏｐ－ｅｒａｔｉｖｅｗｏｒｋ，ＣＳＣＷ）不仅仅受到计算机学科与通信技术的支持，还涉及到社会学、心理学、组织理论和人类学等学科。为了探讨ＣＳＣＷ形成和发展的背景，提出了“协同科学”概念。从信息科学、特别从计算机科学和通信技术角度出发，阐述了ＣＳＣＷ的基本概念、技术支持、应用领域、基本系统分类、关键技术，提出了研究ＣＳＣＷ的体系结构的任务。探讨了ＣＳＣＷ与“信息高速公路”和ＷＷＷ的关系。     

泡沫铝合金的制备方法及性能测试

用化学方法筛选出一种新型的无机复合盐颗粒,将低压渗流法制备泡沫铝合金改为上压渗流铸造法。用驻波管法对制备的样品进行吸声系数测定。结果表明,随孔径的减小、空隙率的增大,其综合吸声系数有增大的趋势。