硅表面含二茂铁基团自组装单分子膜制备及电流-电压关系测量

合成了一种头基为二茂铁基团的长链烯烃分子(Fc-CO-NH-(CH₂)₉-CH=CH₂) (FcUA)，并用红外、核磁、质谱等手段对其进行了表征。用微波引发将该化合物嫁接到平面硅的表面，并用X射线光电子能谱、反射红外光谱、原子力显微镜表征了这一过程。最后，通过循环伏安电化学法和电敏感原子力显微镜的导电模式对其进行电学性质测试。结果表明这层单分子膜可以提高硅片的介电常数。同时还观察到了一种不稳定的类似负微分电流现象。     

添加成膜促进剂合成致密ZSM-5分子筛膜

报道了一种添加氯化钠低温条件下合成出具有纳米尺寸的ZSM-5分子筛，并以 其为晶种预吸附在多孔氧化铝载体上，再通过添加成膜促进剂氯化钠二次水热合成 制备出高度致密ZSM-5分子筛膜的新方法。通过考察添加的钠离子浓度对成膜的影 响，认为在一定浓度范围内钠离子能够促进成膜。SEM结果也验证了这一结论，分 子筛膜主要是由孪生聚晶分子筛组成。渗透结果显示，当添加量为x = 100 (Al_2O_3:84SiO_2:10Na_2O:15TPABr:3500H_2O)时，在室温和0.1 MPa的条件下， H_2/C_3的理想选择性最大值23.7，温度提高到200 ℃时的选择性下降为9.4，但仍 然高于努森扩散值（4.69），表面该膜具有高度的完整性。     

钌(Ⅱ)多吡啶配合物的合成、表征及其三阶非线性光学性质研究

合成了三种含咪唑并[4,5-f]邻菲莫咯啉(IP)的钌(Ⅱ)配合物，通过元素分析、FAB-MS、^1HNMR、UV-vis和电化学对它们进行了表征。运用Z-扫描的实验方法研究了钌(Ⅱ)配合物的三阶非线性折射率n~2和非线性吸收系数α~2，并由此计算出它们的三阶非线性系数χ^(^3^)和分子超极化率γ。分析了分子结构对其三阶非线性光学性质的影响。     

Predictor control and suboptimal digital redesign for continuous-time systems with delayed input

This paper deals with the implementation of a predictor controllaw and the suboptimal digital redesign for a continuous-timeplant with a delayed input. It is shown that the closed-loopeigenvalues of the delayed system designed via a predicted-statefeedback controller are identical to those of the non-delayedsystem with the same gain matrix based on the non-predictedstate feedback. Thus, the well-developed design methods of linearquadratic regulators for continuous-time non-delayed systemscan be indirectly applied to delayed-input systems. Moreover,for practical implementation by digital computer, we derivea suboptimal digital redesign of the delayed-input system usingthe predictor control.     

方位偶极声波远探测技术研究与应用

偶极横波远探测测井技术是当前缝洞型和复杂储层油气勘探开发和评价不可缺少的技术手段。常规偶极远探测技术受限于180?方位的不确定性,难以判别缝洞等地质体的真实方位。采用双偶极错位发射多分量阵列接收研究偶极方位识别方法。首先以传统正交偶极模式获得地质体方位探测结果,再以45?错位角发射偶极声波信号,通过多个邻近接收器的波形差的组合以及反射波在仪器孔径上的时间延迟来区分方位,进一步压制伪像干扰获得地质体真实的方位成像结果。针对弱反射信号,在硬件上,研究了多分量有源接收器阵列声系,有效提升了偶极声波信号信噪比,结合动态增益控制提升反射波幅度;研究了双偶极宽频发射器与多模式发射技术,提高偶极发射功率,保证了偶极声波信号在地层中的远距离传播与反射。数值仿真与实际测井数据表明,双偶极方位识别方法可行,有助于偶极横波远探测技术的进一步发展和应用。     

用线性取余变换造正交拉丁方和幻方

本文利用线性取余变换造正交拉丁方、幻方和泛对角线幻方。文［１］造奇数阶正交拉丁方的方法，文［２］的方法都本文方法的特例。     

微波场中A型分子筛及分子筛膜合成的研究

Effects of aging time and alkalinity as well as cation concentration(Na⁺) on the synthesis of A type zeolite and zeolite membrane were investigated in this paper. The results showed that aging time for synthesis of A type zeolite and zeolite membrane had remarkable influence and alkalinity could accelerate the formation of zeolite but was disadvantage to zeolite membrane synthesis. Cation concentration(Na⁺) also couldn′t accelerate the synthesis of zeolite and zeolite membrane but it was probable an important factor to accelerate crystal growth .Moreover, more compact zeolite membranes could be synthesized by this method while the thickness of membrane was thinner than that of convention. Zeolites and zeolite membranes were characterized by XRD, TEM as well as IR characterization techniques.     

Conformal Affine Toda Fields from a Gauged WZNW

The general conformal affine Toda (CAT) fields are derived as the result of imposing the constraint explicitly on the gauged WZNW action. The reduction procedure naturally indicates the integrability of the resulting system. The action, equations of motion, canonical Poisson brackets for this system are derived from WZNW model. The energy momentum tensor is derived also and is shown to be traceless after being improved.     

The Effect of Secondary Collisions in the Rapidity Distribution in Relativistic Heavy Ion Collisions

Based on the participant model the effect of secondary collisions in relativistic heavy ion collisions is analyzed by introducing additional contributions in fragmentation regions. The rapidity distributions of n of NA35 and WA80 groups are well reproduced. Special improvement is shown in the target fragmentation region.     

THE FACTORS FOR THE EMC PHENOMEKON AND THE RATIO RA=(σL/σT)A

The three factors are discussed which may be related to the EMC phenomenon directly, and it is tried to understand the new results on the ratio R^A=(σ_L/σ_T)_A. It is also pointed out that shadowing cannot match the obvious deviation in the small x region between the data obtained by the two categories of experiments PA and eA.