球形木素基离子交换树脂的合成及其对Cr3+的吸附特性

以木素磺酸钙为原料,利用反相悬浮聚合技术在一种价廉无毒的介质相中制备出球状木质素基离子交换树脂,并讨论了它对Cr3 的吸附性能。结果表明,树脂对低浓度Cr3 的吸附效果好,前期吸附速度快,40min后吸附速率趋缓;升高温度能明显提高前期吸附速率,饱和吸附量约为60mgCr3 /g干树脂,而且树脂在较宽的弱酸性范围内表现出良好的吸附性能。     

聚苯乙烯型双季铵树脂的制备及性能研究

三乙烯二胺和四甲基乙二胺与氯甲基聚苯乙烯反应,得到同时含有季铵和叔胺的强-弱碱型树脂,再用碘甲烷季铵化叔胺,制备聚苯乙烯双季铵树脂;另一种方法是将二甲基苄胺型叔胺树脂用4-溴丁基三甲基溴化铵季铵化引入4碳链双季铵基团。反应结果表明,两类强弱碱基树脂的季铵化反应结果并不理想,二甲基苄胺型叔胺树脂季铵化反应的转化率最高为36%。考察了这些新型双季铵树脂的热稳定性及对水溶液中有机酸(如苯磺酸和对-硝基苯乙酸)的吸附、脱附性能。     

One- and Two-Mode Combination Squeezing Operator for Two Harmonic Oscillators with Coordinate-Momentum Coupling

By virtue of the technique of integration within an ordered product of operators, we derive the normal ordering expansion of a one- and two-mode combination squeezing operator for two harmonic oscillators with coordinatemomentum coupling. It turns out that this squeezing operator just diagonalizes the Hamiltonian H = p21/2m1 m1ω21x21/2 p22/2m2 m2ω22x22/2 - λx2p1, so its ground state is a one- and two-mode combination squeezed state.Quantum fluctuation in the ground state is calculated.     

Hamiltonian Systems and Darboux Transformation Associated with a 3 × 3 Matrix Spectral Problem

Starting from a 3 × 3 matrix spectral problem, we derive a hierarchy of nonlinear equations. It is shown that the hierarchy possesses bi-Hamiltonian structure. Under the symmetry constraints between the potentials and the eigenfunctions, Lax pair and adjoint Lax pairs including partial part and temporal part are nonlinearied into two finitedimensional Hamiltonian systems (FDHS) in Liouville sense. Moreover, an explicit N-fold Darboux transformation for CDNS equation is constructed with the help of a gauge transformation of the spectral problem.     

Al/AlN多层膜的摩擦磨损性能研究

采用柱状靶磁控溅射系统制备Al/AlN纳米多层膜,采用纳米压痕仪测量Al/AlN纳米多层膜的纳米硬度,在UMT-2M型摩擦磨损试验机上评价其摩擦磨损性能.结果表明:当AlN层较厚时,薄膜在很短时间内被磨穿;调节Al/AlN层厚比为2.9/1.1时,薄膜的摩擦磨损性能明显提高;当保持Al/AlN层厚比为2.9/1.1、变化多层膜的调制周期时,薄膜的摩擦系数较低,但硬度较低的薄膜由于承载能力不够,不能够保持优良的摩擦磨损性能.     

套管磨损三维表面形貌恢复及其机理分析

在DCWT-1000型套管摩擦磨损试验机上进行了套管摩擦磨损试验,研究深井、超深井中"冲击-滑动"复合磨损对套管磨损行为的影响,采用三维表面形貌测试仪、光学显微镜及扫描电子显微镜观察分析了在不同载荷条件下套管磨损表面的微观结构和表面形貌,在此基础上对套管磨损表面进行了三维恢复并计算套管磨损表面的主要形貌参数,探讨了套管磨损表面的磨损机理.结果表明:套管的磨损性能与载荷有关;在不同载荷条件下,套管磨损表面的三维形貌具有不同特点,且主要的表面形貌参数与载荷呈现出较好的相关性,证明了三维形貌分析方法能够真实反映套管磨损表面的情况;当冲击载荷和频率不大时,套管的磨损机制以磨粒磨损为主,兼有粘着磨损,随着冲击载荷和频率增加,套管磨损表面出现明显粘着剥落和疲劳剥落迹象,并出现疲劳裂纹扩展和连通,套管的磨损机制向粘着磨损和疲劳磨损转化,磨损趋向严重.     

江苏盱眙出土夹纻胎漆器的测试分析

采用激光拉曼光谱、X射线荧光光谱、红外吸收光谱等方法对盱眙出土的夹纻胎漆器进行了分析研究.研究发现漆膜中的红色颜料和暗黑色颜料分别是HgS和CuS;漆灰的填料以粘土类物质为主,存在着加入骨灰的工艺;生漆被使用在漆灰制作、色漆调制等方面,起到了成膜剂的作用;麻胎之间采用漆灰作为胶合剂.     

颗粒与顺列管束磨损的数值模拟

采用直接数值模拟方法模拟了在管道中直径80μm的颗粒对顺列10×10管束的碰撞和磨损.圆管与流场流体之间的相互作用采用内嵌边界方法进行计算并得到流场结构.颗粒的运动采用了拉格朗日跟踪方法计算并与流场之间进行了双向耦合.计算分析了沿流向以及垂直于流向各排管束受到颗粒的碰撞产生的磨损量.计算结果表明沿流向第三排管束以后的各排管束应采取防磨措旌.     

New Operator Identities and Combinatorics Studied by Virtue of IWOP Technique

Using the coherent state representation we derive some new operator identities and study some mathematical relations in combinatorics. The technique of integral within an ordered product (IWOP) of operators plays an essential role in realizing our goal.     

Weyl-Ordered Operator Moyal Bracket by Virtue of Method of Integral Within an Weyl Ordered Product of Operators

The Moyal bracket is an exemplification of Weyl's correspondence to formulate quantum mechancis in terms of Wigner function. Here we present a formalism of Weyl-ordered operator Moyal bracket by virtue of the method of integral within a Weyl ordered product of operators and the Weyl ordering operator formula.