在span20存在下孔雀石绿与金的显色反应研究

研究了在ｓｐａｎ２０存在下孔雀石绿－金的显色反应。结果表明，金－孔雀石绿－ｓｐａｎ２０的三元络合物的表观摩尔吸光系数比孔雀石绿－金的大７～８倍，可达５．０×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。金含量在（０～１２）μｇ／１０ｍｌ范围内符合比尔定律。     

《管理信息系统》教学中管理信息模拟的研究

本文从管理信息系统为组织管理服务的观点出发，以教学为社会服务为目标，系统地论述了管理信息模拟在《管理信息系统》教学中的理论与实践相结合的方法，并提出了ＭＩＳ管理信息模拟教学系统的框架。     

热处理对3Cr2W8V和4Cr5MoSiV1钢力学性能的影响

本文对热作模具钢３Ｃｒ２Ｗ８Ｖ和４Ｃｒ５ＭｏＳｉＶ１钢的耐磨性、高温拉伸、冲击性能及热疲劳抗力进行了对比研究．结果表明，４Ｃｒ５ＭｏＳｉＶ１钢的高温强韧性优于３Ｃｒ２Ｗ８Ｖ钢，且具有更高的耐磨性及热疲劳抗力，更适宜做摩擦压力机热锻模．     

分散染料溶解度参数的计算及应用

用Small、Hoy、Krevelen和Fedors基团增量法,对50只蒽醌、偶氮分散染料的溶解度参数进行了计算,并作了比较。对Small法中—NH_2、—NO_2、—NH—、—N—基团的吸引力常数作了补充。确认用于计算分散染料及涤纶纤维溶解度参数的较好方法是Hoy法。且发现:①当染料的溶解度参数与涤纶的溶解度参数接近时,染料的耐升华牢度可达4—5级;②分散染料摩尔体积与其匀染性几乎呈反比关系,当摩尔体积为210—340cm~3/mol时,匀染性能可达3—4级;③分散染料的扩散系数随着其摩尔体积的增大而减小,其减小趋势逐渐变缓。     

矩阵方程A~TX+XB=C的新解法及应用

本文利用Kronecker积和拉直算子,直接了当地化矩阵方程A~TX+XB=C为线性方程组My=b。从而用简便的初等方法讨论矩阵方程的相容性.解的存在唯一性.解法以及解的表达式。并应用于研究微分方程dx/dt=AX解的渐近稳定性、稳定性.还给出李亚普诺夫数的简洁构造式。     

Thermo-responsive interpenetrating polymer networks composed of AAc/AAm/NMA by radiation grafting

Interpenetrating polymer network (IPN) hydrogels were prepared by grafting of acrylamide (AAm), N-methylol acrylamide (NMA) and acrylic acid (AAc) onto preirradiated polypropylene (PP) membrane. To obtain PP-g-AAc/AAm/NMA IPN hydrogels, at first, AAc were grafted onto preirradiated PP and then AAm were grafted onto the PP-g-AAc membranes. Finally NMA were grafted onto PP-g-AAc/AAm membranes. In the different stages of grafting under different reaction conditions, trapped radicals in the membrane samples were probed by electron spin resonance (ESR). The temperature response behaviors of the IPN hydrogels were studied. Reversible behavior and controlled release of drug tests made reflecting the switching to on state at higher temperatures and to off state at lower temperatures were achieved. By increasing the grafted content of NMA, higher transition temperature of the hydrogel could be attained.     

Data quality assurance for thermophysical property databases--applications to the TRC SOURCE data system

To a significant degree processes of database development are based upon human activities, which are susceptible to various errors. Propagation of errors in the processing leads to a decrease in the value of original data as well as that of any database products. Data quality is a critical issue that every database producer must handle as an inseparable part of the database management. Within the Thermodynamics Research Center (TRC), a systematic approach to implement database integrity rules was established through the use of modern database technology, statistical methods, and thermodynamic principles. The four major functions of the system--error prevention, database integrity enforcement, scientific data integrity protection, and database traceability--are detailed in this paper.     

Global Attractivity of the Equilibrium of a Nonlinear Difference Equation

The authors consider the nonlinear difference equation x_n+1=x_n+x_n-kf(x_n-k),n=0,1,(0.1) where (0,1), k 0,1, and f C¹[[0,), [0,)] with f(x) < 0.They give sufficient conditions for the unique positive equilibrium of (0.1) to be a global attractor of all positive solutions. The results here are somewhat easier to apply than those of other authors. An application to a model of blood cell production is given.