疏水性阳离子单体ADMCAB及其共聚物的溶液性质

以二甲基胺乙基甲基丙烯酸酯(DMAEMA)和1溴十六烷(CB)为原料,合成了具有化学反应活性与表面活性的新型疏水性季铵阳离子单体-甲基丙烯酰氧乙基二甲基十六烷基溴化铵(ADMCAB).并用丙烯酰胺(AM)与该单体共聚制备了疏水化水溶性聚电解质AMAC系列.经过FTIR、1HNMR、MS、EA和滴定分析等对ADMCAB的结构进行了确证.研究表明:ADMCAB易溶在多种溶剂中及具有好的表面活性;在无机盐是否存在的情况下,含少量ADMCAB的共聚物(AMAC)均比聚丙烯酰胺均聚物(PAM)具有更强的增粘特性.     

铜(Ⅱ)与碘代苯丙氨酸和芳香氮碱三元混配配合物的稳定性研究

用电位ｐＨ 法测定了铜（ Ⅱ） 与４碘基Ｌ苯基丙氨酸（ＬＩｐｈｅ） 和１ ,１０ —邻菲咯啉（ｐｈｅｎ） 、２ ,２＇联吡啶（ｂｉｐｙ） 或乙二胺（ｅｎ） 三元混配配合物在２５ ℃和离子强度Ｉ＝ ０ ．１（ＫＮＯ３） 条件下的稳定常数．３ 种体系均形成稳定的混配配合物．含有芳香氮碱的Ｃｕ（ｐｈｅｎ）（ＬＩｐｈｅ） 和Ｃｕ（ｂｉｐｙ）（ＬＩｐｈｅ） 明显比含有脂肪族氮碱的Ｃｕ（ｅｎ）（ＬＩｐｈｅ） 稳定．讨论了这些配合物稳定性增加的原因和碘的作用．     

遥感技术在长江江苏段防洪减灾中的应用

应用遥感多时相分析方法对长江岸滩变迁进行动态调查,研究河床的时空演变规律,结合河床边界条件分析及江岸崩坍灾害调查,进行江岸稳定性评价,为长江江苏段治理及防洪减灾提供基础资料和科学依据．结合长江流域生态环境变化的研究,提出长江长治久安的意见和进一步开展遥感工作的建议．     

稳态大系统多目标优化的双环递阶算法

对于稳态大规模工业系统,提出了一种能够充分满足决策者的偏好克服目标函数不可分性的双环失代算法。该算法首先根据决策人员的偏好把多目标问题聚集为不可分的竟址财嵌入到可分的多目标优化问题中,然后从目标的非劣解集中挑出不可分单目标的最优解,并证明了该最优解就是原问题的非劣解,算法的收敛性也有严格的数学保证。     

促红细胞生成素与中枢神经系统损伤

1989年促红细胞生成素(erythropoietin,EPO)开始应用于临床,但它的应用范围主要局限于治疗各类贫血,如肾性贫血、爱滋病患者贫血、癌症相关贫血等。近年的研究发现,EPO在中枢神经系统内也有大量的分布,并且有其受体的广泛表达。脑源性EPO的生成受多种因素的影响。EPO具有营养神经的功能,并且在中枢神经系统的发生发育、神经功能的维持以及多种神经系统损伤中有着重要作用。     

On the decomposition problem of neutral type linear large scale control system in the theory of stabilization(1)

In this paper we choose the symmetric positive definite solutionof Riccati matrix algebraic equation and,construct a positive defini-tequadratic form V-function and,use Lyapunov deco mpositionequivalence method founded by Liu Yong-qing to obtain the condi-tions of the asymptotic stability of the solution of neutral typelinear large scale control system,the estimate formula of thedecom posing coefficients and time delay are also given.     

分形模型的平稳性分析

分数布朗运动模型是描述具有统计自相似随机过程现象的一种模型。本文讨论了分数布朗运动模型在正交小波变换下的性质，指出了分数布朗运动模型不稳定的原因，从而证明了分数布朗运动通过一个带通的滤波器后为一具有统计自相似性的平稳过程的一般结论。     

Research of Inclusion Complexation of 4,4'-Thiodiphenol Effected by β-Cyclodextrin in Aqueous Solutions and the Effect on Photodegradation

The inclusion behavior of 4,4′ -Thiodiphenol (TDP),a typical bisphenol and endocrine disruptor,reacts with β-cyclodextrin (β-CD) in aqueous solutions has been investigated by means of UV absorption spectrum and quantum-chemical calculation with Gaussian 98 software. The results show that the inclusion behavior of TDP is quite different in acidic solutions (pH 5.9) from that in alkaline solutions (pH 10.0). This behavior difference is attributed to the different formula structures in aqueous solutions at acidic and alkaline pH values that are demonstrated by quantumchemical modeling and calculation. TDP forms a 1∶1 β-CD inclusion complex in aqueous solutions. The equilibrium constant K was calculated to be 553.49 L/mol at pH 5.9 and 1 318.20 L/mol at pH 10.0 respectively for the inclusion complex reaction by using the modified Benesi-Heldbrand equation. After inclusion TDP's structure is changed especially at the inclusion part with the bond order becoming larger,which results in inhibitive photodegradation during direct photooxidation and H2O2 assisted photooxidation.     

On Geometrically Uniform Signal Sets and Signal Sets Matched to Groups

H.-A.Loeliger [3] proved that the concepts of the geometrically uniform signal setand the signal set matched to a group coincide when the signal set is finite.In the present notewe show that these two concepts also coincide even when the signal set is infinite.     

Optimization for the structure of BF hearth bottom and the arrangement of thermal couples

The hearth of ＂heat transfer method＂ and the ceramic cup synthetic hearth bottom of ＂heart isolation method＂ are two most popular designs for blast furnace （BF）. Although there are successful real examples, some disadvantages, for instance large heat loss and high cost, still exist for these designs. According to the theory of heat transfer, based on the calculation of temperature distribution of the hearth bottom, it is elucidated that all brick layers at the hearth bottom may not be considered as the only reason why different structures exhibited different temperature distributions although total heat resistance is the same, and then based on the effect of hot metal and cold water on different temperature distribution ranges, the concepts of ＂heat resistance＂ and ＂cooling enhancement＂ are put forth. Based on this, the disadvantages and the factors affecting temperature distribution, of the two types of hearth bottoms were illustrated. On the basis of these analyses, a novel structure for BF hearth bottom designing that can easily form ＂self-protecting＂ slag layer stably, called ＂the method of gradient brick layout that has an optimum combination of cooling enhancement and heat resistance＂ was proposed; it can not only prolong the hearth bottom longevity but also reduce the cost and heat loss.