A LINEARIZED PROCEDURE FOR SOLVING INVERSE SENSITIVITY EQUATIONS OF NON-DEFECTIVE SYSTEMS

A linearized algorithm for solving inverse sensitivity equations of non-defective systems is presented. It is based on the orthonormal decomposition of the first order directional derivatives and directional continuity along τ of the τ−λ base. The least-squares methods which minimize the trace of eigenmode matrix suggested by Pešek and Lallement, respectively, for self-adjoint systems are extended to general non-defective systems in this paper. Moreover, the new algorithm has intuitive simple geometrical significance and is consistent with the first order Taylor expansion of the τ−λ base. The numerical results calculated from the aforementioned three methods are compared, respectively, with the exact solution using two simulation examples. It demonstrates that the results of the proposed algorithm are the nearest to the exact solution.     

RESONANCES OF A NON-LINEAR s.d.o.f. SYSTEM WITH TWO TIME-DELAYS IN LINEAR FEEDBACK CONTROL

The primary, superharmonic, and subharmonic resonances of a harmonically excited non-linear s.d.o.f. system with two distinct time-delays in the linear state feeback are studied. The two different time-delays are presented in the proportional feedback and the derivative feedback respectively. The method of multiple scales is utilized to obtain the first order approximation of response. The effect of the feedback gains and time-delays on the steady state responses of three types of resonances is investigated. It is found that a proper selection of the feedback gains and time-delays can enhance the control performance.     

A Liouville-Type Theorem for Strongly Subharmonic Functions on Complete Non-compact Riemannian Manifolds and Some Applications

We prove that if Mis a complete non-compact Riemannian manifold and ₁(M)=0, then any C ²solution of uk> 0 is unbounded. We apply this result to obtain an estimate for the size of the image set of some types of maps between Riemannian manifolds.     

胆紫素的形成和八乙基卟啉的光氧化

本文利用八乙基卟啉镁络合物, 光氧化后, 经过简单的处理, 生成锌络合物,再经硝酸银处理后, 即得到胆紫素。     

末端为噻吩基的聚苯乙烯大分子单体的合成及其氧化偶联聚合

以丁基锂为引发剂、四氢呋喃为溶剂 ,在氮气气氛和 - 78℃下进行苯乙烯 (ST)阴离子聚合 ,并加入 3 溴噻吩作为终止剂 ,从而合成出末端含噻吩基的聚苯乙烯 (PST Thp) ,它可以进行氧化偶联聚合 ,是一类新的大分子单体 .在无水三氯化铁作用下 ,PST Thp可以进行均聚反应或与噻吩进行共聚反应 ,共聚反应生成主链刚性、支链分子量分布窄的聚 (噻吩 接枝 苯乙烯 ) (PThp g ST) ,凝胶渗透色谱、红外光谱和吸收光谱证实接枝共聚物的生成     

新型双极有机小分子化合物及其Al3+配合物的合成与发光

合成了一种新的具有“双极”(bipolar)性质的有机小分子蓝色发光材料2-(5-(4-(二苯胺基)苯基)-1,3,4-噁二唑-2-)苯酚［2(5-(4-(diphenylamino)phenyl)-1,3,4-oxadiazol-2-yl)phenol, HPOT］, 并以HPOT为配体, 与铝离子配位, 合成了三(2-(5-(4-(二苯胺基)苯基) 1,3,4-噁二唑-2-)苯酚)合铝［tri(2-(5-(4-(diphenylamino)phenyl)-1,3,4-oxadiazol-2-yl)phenonate)aluminum, AlPOT］配合物. 用 1 H NMR、 HRMS和元素分析进行了表征, 并测定了两种化合物的光致发光性质和热稳定性. 结果表明: 两种新化合物的热稳定性好, 光致发光性能优良, 是制作有机电致发光器件的候选材料.     

一种新型铕(Ⅲ)三元配合物的合成与电致发光

合成了一种含有空穴传导基团三苯胺、电子传导基团嗯二唑的新型配体（EtPOTIP）及其铕（Ⅲ）的三元配合物Eu（DBM）,EtPOTIP,通过^1HNMR、IR、元素分析及质谱对它们的结构进行了表征．对配体和配合物的吸收光谱及光致发光光谱研究结果表明：配体和配合物对近紫外光有强烈吸收,配合物在近紫外光激发下发出强的Eu^3＋特征红光,荧光量子效率为0．48;热分析显示配合物具有高的热稳定性,表明合成的配合物是一种优良的多功能红色发光材料。制作了相应的明亮电致发光器件,显示EtPOTIP同时具备空穴传导和电子传导性能,EtPOTIP在配合物中的存在显著改善了器件的电致发光性能。     

枸杞子四种原性状的FTIR光谱法鉴别

本文利用傅里叶变换红外（FTIR）光谱法无损快速鉴别了枸杞了的四种原性状。结果表明：不同颜色、不同味道、不同质地及不同形状的枸杞子的红外光谱谱图较为特征,各种枸杞子的红外官能团吸收均遵循一定的变化规律。该方法快速、简便、直观、样品不需要分离提取。