五种含氨基和吡啶基功能性聚合物对Ir(Ⅳ)、Ru(Ⅳ)的吸附行为

五种含氨基及吡啶基功能性聚合物:2,6-二氨基吡啶树脂(DAPR),2-氨基甲基吡啶树脂(2-AMPR),2-氨基吡啶树脂(2-APR),3-氨基吡啶树脂(3-APR),4-氨基吡啶树脂(4-APR)对Ir(Ⅳ)和Ru(Ⅳ)的最佳吸附酸度均为0.1mol HCl/L、对Ir(Ⅳ)的吸附容量分别为1200、786、480、500和381mgIr(Ⅳ)/g树脂,其吸附摩尔比(离子/功能基)分别为2.11,1.20,0.67,0.81,0.59。对Ru(Ⅳ)的吸附容量分别为146,249,177,140,188mgRu(Ⅳ)/g树脂,其吸附摩尔比分别为0.49,0.72,0.47,0.43,0.56。树脂对Ir(Ⅳ)的表现吸附活化能分别为27.7±1.4,33.9±0.5,37.0±1.0,37.1±2.9,39.7±4.5kJ/mol。25℃时对Ir(Ⅳ)吸附的分配系数Kd分别为37.5×10~3,14.8×10~3,8.2×10~328.4×10~3,40.1×10~3 mL/g,吸附热焓(除2-AMPR外)均为零。这五种树脂对Tr(Ⅳ)的吸附摩尔比均大于相应的Ru(Ⅳ)。树脂吸附Ir(Ⅳ)前后的红外谱图表明有氨基吡啶功能基特征峰的消失和Ir-Cl键吸收峰在290或310cm~(-1)处产生。     

Stability of <Emphasis Type="Italic">C</Emphasis>-regularized Semigroups

Let T = (T(t))t≥0 be a bounded C-regularized semigroup generated by A on a Banach space X and R(C) be dense in X. We show that if there is a dense subspace Y of X such that for every x ∈ Y, σu(A, Cx), the set of all points λ ∈ iR to which (λ - A)^-1 Cx can not be extended holomorphically, is at most countable and σr(A) N iR = Ф, then T is stable. A stability result for the case of R(C) being non-dense is also given. Our results generalize the work on the stability of strongly continuous senfigroups.     

Entropy Production and Admissibility of Shocks

In shock wave theory there are two considerations in selecting the physically relevant shock waves.There is the admissibility criterion for the well-posedness of hyperbolic conservation laws.Another consideraztion concerns the entropy production across the shochs.The latter is natural from the physical point of view,but is not sufficient in its straightforward formulation,if the system is not genuinely nonlinear.In this paper we propose the principles of increasing entropy production and that of the superposition of shocks.These principles arc shown to be equivalent to the admissibility criterion.     

二次风率对分级进风燃烧室内湍流燃烧与NOx生成的影响

本文在分级进风燃烧室的热态实验装置上,测量了燃烧室内湍流燃烧的温度场和组分浓度场,研究了分级进风的流量比率即二次风率对燃烧及NOx生成的影响.得到了四组不同二次风率下燃烧室内气体温度和O2、CO2、CO与NO浓度的分布.     

探究支撑课堂智慧滨绎精彩——一道高考试题的剖析与赏析

数学课堂教学呼唤精彩,特别要重视未曾预约的精彩,因为那是“来自上帝的礼物”,是一种转瞬即逝的弥足珍贵的动态生成资源.作为新课程理念下的数学教师,更要具备一双慧眼,拥有一份美丽期待,让更多无法预约的精彩呈现于数学课堂之中.但数学课堂教学的精彩并非可遇而不可求的,让探究支撑数学课堂,将会链接许多意想不到的精彩.本文试图从一道高考试题的课堂探究生成,谈谈如何在课堂中演绎精彩.     

THE COMPACTION OF TIME-DEPENDENT VISCOUS GRANULAR MATERIALS CONSIDERING INERTIAL FORCES

In the present paper, compactions of time-dependent viscous granular materials are simulated step by step using the automatic adaptive mesh generation schemes. Inertial forces of the viscous incompressible aggregates are taken into account. The corresponding conservation equations, the weighted-integral formulations, and penalty finite element model are investigated. The fully discrete finite element equations for the simulation are derived. Polygonal particles of aggregates are simplified as mixed three-node and four-node elements. The automatic adaptive mesh generation schemes include contact detection algorithms, and mesh upgrade schemes. Solutions of the numerical simulation are in good agreement with some results from literatures. With minor modification, the proposed numerical model can be applied in several industries, including the pharmaceutical, ceramic, food, and household product manufacturing.     

0MATLAB在空间图形中的动态应用

学生空间思维的不足影响了学生对空间曲面的理解和重积分的学习。本文通过二个实例,重点讨论了用MATLAB动态生成空间图形的技巧。     

硅(100)非重构表面上乙炔吸附反应的理论研究

采用量于力学AM1半经验分子理论轨道方法计算了在Si(100)非重构光滑附氢表面上乙炔化学吸附反应过程中的体系生成热,由此得到各步骤反应的活化焓和反应热数值.结果表明,乙炔分子容易在Si(100)表面上形成稳定的双位σ键吸附.     

MATLAB在空间图形中的动态应用

学生空间思维的不足影响了学生对空间曲面的理解和重积分的学习。本文通过二个实例,重点讨论了用MATLAB动态生成空间图形的技巧。