A New General Equation of the Polarographic Waves

A new general equation of the polarographic waves that improves the accuracy of the analysis has been obtained. The theoretical approach has been developed for Current Sampled DC Polarography or TAST Polarography, and can be used to study reversible, irreversible and quasi‐reversible waves. In order to facilitate the use of the new equation proposed, we have developed a computer program, TOP v1.0. This version works on Windows 32 bits systems (95/98/NT/Xp).     

直流溅射电致变色NiOxHy膜的研究

采用直流溅射Ni(OH)2粉末压实靶制作了电致变色膜.介绍了制膜工艺,用XRD谱研究了着色前、后膜的结构,XPS谱研究Ni、O的结合.谱响应特性和电化学特性表明,膜的电色活性良好.     

非自伴算子代数间的等距代数同构

设Ｇｉ是满足第二可数性公理的、Ｈａｕｓｄｏｒｆｆ的、顺从的、ｒ－离散的、主的局部紧群胚，并且有一个紧开Ｇ－集覆盖；设Ｐｉ是Ｇｉ中含Ｇ＿ｉ￣０的开闭集，且满足及相应的模是具有性质ＤＣ的Ｃ（Ｇｉ）的子代数（ｉ＝１，２）．本文证明从Ａ（Ｐ１）到Ａ（Ｐ２）上的每一个等距代数同构可以扩张成从Ｃ（Ｇ１）到Ｃ（Ｇ２）上的Ｃ－同构，进一步，可以对Ｃ（Ｇ２）重新坐标化，使得这个Ｃ－同构可由一个群胚同构生成．     

柴油机直接作用调速器的优化设计

利用柴油机调速系统过渡过程的数学模型,以柴油机设计需要的稳定调速率为基准,建立了直接作用调速器的优化数学模型,从而设计出调速器的最优结构参数,并对优化结果进行了试验验证,调速系统的主要指标符合运转要求。     

多角度透视元数据

介绍了元数据的概念和DC元数据的产生及其核心元素,分析了元数据的优点,对元数据标准的制定以及数字化图书馆中DC元数据系统与CNMARC系统的相互映射转换问题进行了探讨。     

The Characteristics of Direct Hydroxylation of Benzene to Phenol with Molecular Oxygen Enhanced by Pulse DC Corona at Atmospheric Pressure

The direct hydroxylation of benzene using molecular oxygen by atmospheric pulse DC corona discharge was investigated. The conversion of benzene increased with the increase of oxygen content and input voltage but the selectivity of phenol decreased due to the formation of polymerized products. The reactivity was also influenced by the kind and content of background inert gas. By using argon as background gas, we could get 2.2% of phenol yield at 60°C and 1 atm with energy consumption of 50 W. The strategy of reductive oxidation, which added hydrogen to the reactant, was not favorable to the phenol formation in this reaction system. The polymerized product showed the oligomeric character and the analysis of its chemical structure with FT–IR was presented.     

Spectroscopic investigation of the discharge for PA-CVD of TiN

Investigations of the discharge for PA-CVD of TiN on steel substrates are carried out using optical emission spectroscopy. A great number of species could be identified in the discharge. The growth rate of dense layers shows a direct dependence on Ti⁺ intensities. The occurrence of TiN in the discharge leads to f aky, not compact layers, lowering the hardness of the layers.     

基于自适应斜坡补偿的双环电流模DC/DC混沌控制

提出了一种自适应斜坡补偿方法,将该方法引入到双环电流模buck DC/DC的混沌控制中,并给出实现该方法的电路结构.建立了双环电流模DC/DC系统稳定性分析的离散模型,理论分析了自适应斜坡补偿在双环控制下系统的稳定性条件,推导出了自适应因子k与系统工作的最大占空比的关系式.仿真结果表明该方法可有效控制系统的分岔和混沌现象,提高系统的工作范围和动态响应速度.     

新疆远志内生真菌的分离及其代谢产物分析

采用组织块法从栽培新疆远志(Polygala hybrida DC)的根、茎、叶中分离内生真菌32株.利用化学成分的系统预试验,对部分菌株发酵液中代谢产物进行研究.结果表明:新疆远志内生真菌代谢产物的种类比较多,主要是皂苷、内脂、香豆素、生物碱、蛋白质及糖类物质.采用薄层层析(TLC)和紫外-可见光分光光度法对内生真菌发酵液进行分析,最终发现真菌YZ-31可代谢产生皂苷等成分.经形态学初步鉴定该菌株为交链孢霉属(Alternaria Nees)真菌.     

高阻硅衬底MOS结构共面波导的偏压特性

提出一种新型高阻硅(电阻率ρ>8kΩ.cm)衬底MOS(metal-oxide-semiconductor)结构的凸起式共面波导。给出了其在50MHz～40GHz频段的插入损耗和回波损耗测试结果,以及在-40V～+40V直流偏压下散射参数的变化。结果表明,随着偏压的变化,回波损耗在Ka波段极值点的频率和幅值均会产生偏移,插入损耗极值点的频率基本没有偏移,只存在幅值偏移。共面波导的损耗偏移与MOS结构的Si-SiO2界面效应有关,在凸起式共面波导损耗的偏压实验中,观察到与传统MOS结构共面波导相反的曲线,并尝试给出了理论解释。该文设计的共面波导在35GHz下实现了小于-0.010dB/mm的损耗,优于Ka频段硅衬底共面波导已报道的结果。