对合的分解

Using the notion of biconnected sum we define the biconnected sum (T₁, M₁)§(T₂,M₂) of two involutions (T1M1) and (T2,M2) which is an involution on the biconnected sum M₁,§M₂. A connected involution is said to be reducible if it can be expressed as a biconnected sum of two connected involutions.Theorem Each connected involution (T, M) can be decomposed into a bi-connected sum of connected irreducible involutions (T, M)=(T₁, M₁)§…§(T_q,M_q),and (?) where the coefficients of H_{n_1}(M) are in Z/2 Z if M is unoriented, in Z if is oriented .     

High—Efficiency Organic Double—Quantum—Well Light—Emitting Devices Using 5,6,11,12—Tetraphenylnaphthacene Sub—monolayer as Potential Well

The double-quantum-well organic light-emitting devices of indium-tin-oxide (ITO)/NPB (50nm)/rubrene (0.05nm)/NPB (4nm)/rubrene (0.05nm)/Alq3 (50nm)/LiF (0.5nm)/Al were fabricated, in which N,N-bis-(1-naphthyl)-N,N‘-diphenyl-1,1‘-biphenyl-4,4‘‘‘‘‘‘‘‘-diamine (NPB) is used as a barrier potential or hole transport layer, tris (8-hydroxyquinoline) aluminium (Alq3) used as electron transport layer, and 5,6,11,12-tetraphenylnaphthacene (rubrene) as a potential well and emitter. The brightness can reach 18610cd/m^2 at 13V. The maximum electroluminescent efficiency of the device was 6.61cd/A at 7V, which was higher than that of common dope-type devices. In addition, the electroluminescence efficiency is relatively independent of the drive voltage in the range from 5 to 13V.     

First Total Synthesis of 12-Hydroxy-13-methylpodocarpa-9, 11, 13-trien-3-one

12-Hydroxy-13-methylpodocarpa-9, 11, 13-trien-3-one 9 was isolated from the twigs ofCroton salutaris1. Many diterpenes exhibit significant bioactivities, such as antibac-terial and antitumour and 9 has a rare structure. In order to study the relationshipb…     

三种瓜环与4,4′-联吡啶及N,N′-二甲基4,4′-联吡啶盐酸盐相互作用的研究

以七元瓜环(Q[7])和新型椭圆型改性瓜环———对称四甲基取代六元瓜环(TM eQ[6])为主体,4,4′-联吡啶的盐酸盐(44)以及N,N′-二甲基4,4′-联吡啶的盐酸盐(dm44)为客体的主客体相互作用进行了考察.实验结果表明,Q[7]与客体44及dm44作用体系中,客体为了更有效地被主体Q[7]包结,在Q[7]内腔中呈倾斜状分布的几率最高.用核磁共振、循环伏安以及紫外吸收光谱对实验结果进行了印证和补充,验证了TM eQ[6]与客体44及dm44可发生较强的相互作用,形成一维的自组装超分子结构.核磁共振以及循环伏安方法的实验结果表明,没有观察到Q[6]与客体44及dm44的明显作用,而紫外吸收光谱方法证实,Q[6]与客体44确实存在一定的相互作用,比较主客体的结构特征,该作用体系也可能存在自组装的一维超分子结构等多种作用形式.     

用正四棱锥形阵对声目标定位研究

文章结合声阵列在智能雷系统中的应用，提出了用立体五元声阵列对声目标进行定位，将智能雷中用于预警的传感器也参与到定位阵列中来，这样就在不增加传感器的条件下实现了市体阵列对声目标的定位。文章推导了定位公式和误差公式，并对结果进行仿真分析，与平面阵相比取得了较好的效果。不但提高了精度还降低了声阵列的盲区。     

TrpH—TryOH肽链中电子的逆向转移

本文较详细的研究了色氨酰酪氨酸二肽（ＴｒｐＨ－ＴｙｒＯＨ）中的电子转移，电子该电子转移的速率，甚至电子转移的方向都强烈的依赖于溶液的ｐＨ。而且，该肽中的酪氨酸残基瞬态粒子浓度与色氨酸残基瞬态粒子浓度之比也强烈的依赖于ｐＨ。根据这种依赖性，求得了二肽中的ｐＫａ（ＴｒｐＨ＾＋）和ｐＫａ（ＴｙｒＯＨ），其值分别为６．２和１１．３。     

用四元数证明欧拉位移定理

采用四元数方法对欧拉位移定理进行证明。