Endomorphisms of free modules as sums of four quadratic endomorphisms

We will prove that every endomorphism of a free right R-module of infinite rank can be decomposed as a sum of four endomorphisms which satisfy some fixed polynomial identities.     

铁电存储器FM24CL64与TMS320C5509在数字信号处理中的配合应用

TMS320C5509是TI公司推出的一款数字定点DSP芯片,它支持I2C(inter-Integrated circuit)协议并为此提供了专门的外设接口(第89管脚SDA和第90管脚SCL).笔者给出了用铁电存贮器FM24CL64与DSP相连来共同实现DSP在突然调电时进行数据保护的方法.     

Characterizations of logA≥logB and normaloid operators via Heinz inequality

In 1951, Heinz showed the following useful norm inequality:If A, B0and XB(H), then AXB ^r X^1–r A ^r XB ^r holds for r [0, 1]. In this paper, we shall show the following two applications of this inequality:Firstly, by using Furuta inequality, we shall show an extension of Cordes inequality. And we shall show a characterization of chaotic order (i.e., logAlogB) by a norm inequality.Secondly, we shall study the condition under which , where is Aluthge transformation ofT. Moreover we shall show a characterization of normaloid operators (i.e.,r(T)=T) via Aluthge transformation.     

Polymerisation of liquid crystalline phases in binary surfactant/water systems

The self-assembly behaviour of the polymerisable surfactant -undecenyltrimethylammonium bromide (-UTAB) both before and after polymerisation has been investigated. In addition polymerisation of the liquid crystalline phases formed by this surfactant in aqueous solution has been studied. Introduction of the carbon-carbon double bond at the end of the hydrocarbon chain increases the rigidity of the paraffinic chains such that the Krafft curve is shifted to higher temperatures compared with that of dodecyltrimethylammonium bromide, a nonpolymerisable analogue. Both the polymerised and non-polymerised forms have been observed to have the same phase progression, with the polymer being more soluble in water such that the liquid crystalline phases formed at high surfactant concentration are accessible at room temperature. Polymerisation of the liquid crystalline phases of -UTAB indicate that polymerisation proceeds to approximately 40% (in comparison) with 80% in a non-aggregated form) and that the original monomeric matrix is undisturbed upon partial polymerisation.     

光导纤维光谱电化学池的研制及初步应用

研制了光导纤维光谱电化学池(FOSECC),并用该池研究Fe(CN)₆^3-/Fe(CN)₆^4-一氧化还原体系。获得不同电位下的吸收光谱;在不同温度下分别测定了式量电位E°′和反应得失电子数n;求出了体系电极反应的△H°和△S°;计算了FOSECC的灵敏度--摩尔吸收/电位比,结果满意。     

氧化钇粉体的抗水化处理研究

研究了室温下不同表面修饰剂对Y2O3粉体水化的影响,提高了Y2O3粉体的抗水性和分散性。结果显示:柠檬酸作为表面修饰剂,可以有效阻止Y2O3粉体与水反应,同时添加分散剂Dolapix CE 64,可以制备固含量高、化学稳定的水基Y2O3浆料。     

Equation of state of aluminum carbide Al4C3

Quasi-hydrostatic compression of aluminum carbide, Al₄C₃ has been studied to 6 GPa at room temperature using energy-dispersive X-ray powder diffraction with synchrotron radiation. A fit of the experimental p-V data to the Birch equation of state yields the values of the bulk modulus, B₀, of 130(5) GPa and the first pressure derivative of the bulk modulus, B′₀, of 4.6(9). The compression is found to be anisotropic, with the a-axis being more compressible than the c-axis.