含三苯胺的1,8-萘酰亚胺衍生物的合成及光谱和电化学性能研究

通过Suzuki偶联反应合成了一系列含三苯胺的1,8-萘酰亚胺衍生物，并进行了表征及光谱和电化学性能研究。研究表明该类化合物的荧光波长在584~610nm，位于橙色区。三苯胺的引入降低了化合物的HOMO值，有利于空穴的注入。     

INFLUENCE OF SOIL MOISTURE AND VEGETATION ON CLIMATE (Ⅰ)——THEORETICAL ANALYSIS TO PERSISTENCE OF SHORT-TERM CLIMATE ANOMALIES

Influence of soil moisture and vegetation on persistence of short-term climate anomalies isanalyzed theoretically through a heat and water balance model in coupled air-land system.It is shown that the soil hydrologic condition, rather than the soil thermal situation, is adominant factor in maintenance of climatic anomalies. The persistence of climate anomaliesis dependent largely on the capacity of water and heat exchange on the land surface. The cli-mate anomalies would persist longer for less soil moisture or vegetation cover. Furthermore,compared with humid areas, the climate anomalies persist longer in an arid climate envi-ronment.     

A New Neodymium∶Phosphate-glass Single Transverse Mode Fiber Laser with Double Clad Geometry

１ＩｎｔｒｏｄｕｃｔｉｏｎＷｉｔｈｓｉｎｇｌｅｍｏｄｅｆｉｂｅｒｌａｓｅｒｓ，ｉｔｉｓｑｕｉｔｅｅａｓｙｔｏｇｅｎｅｒａｔｅｅｘｃｅｌｅｎｔｑｕａｌｉｔｙｂｅａｍｏｆｓｉｎｇｌｅｔｒａｎｓｖｅｒｓｅｍｏｄｅ［１，２］，ｂｕｔｔｈｅｙｈａｖｅｂｅｅｎｇ...     

丙烯酰胺水溶液聚合──添加Na_2CO_3制取高分子量阴离子型速溶聚丙烯酰胺的研究

本文建立了丙烯酰胺水溶液聚合的潜在型引发体系；研究了在碳酸盐法聚合体系中，添加不同量氨、尿素、ＥＤＴＡ—２Ｎａ，以及聚合体系ｐＨ、单体浓度、聚合水浴温度对聚合产物分子量及其溶解性能的影响规律和原因；解决了产物高分子量与产生不溶聚合物之间的矛盾；指出了获得高分子量阴离子型速溶粉末产品的关键．从而，用碳酸盐法得到了溶解性能优异的［η］高达２８ｄｌ／ｇ的胶体产品和［η］高达２２ｄｌ／ｇ的速溶粉末产品．     

L-拓扑空间中的T3#分离性

在L-拓扑空间中定义T3#,T3分离性,讨论与其他分离性的关系,论证了它们是L-好的推广,证明了T3#空间范畴是有积和上积的范畴。     

Improvements of LaSalle's Theorem

In this paper,we improve LaSalle's invariance theorem based on Li'swork(Li Yong,Asymptotic stability and ultimate boundedness,Northeast.Math.J.,6(1)(1990),53-59)by relaxing the restrictions,which make the theorem moreeasy to apply.In addition,we also improve LaSalle's theorem for stochastic differ-ential equation established by Mao(Mao Xuerong,Stochastic versions of the LaSalletheorem,J.Differential Equations,153(1999),175-195).     

再制造系统中专业拆解中心货源预测及决策

在再制造过程中,制造商倾向于把废旧产品的拆解外包给专业拆解中心,而专业拆解中心更关心自己的赢利情况.在给出专业拆解中心运营模式基础上,分析专业拆解中心赢利的关键因素——货源,利用马尔科夫理论对货源进行预测及决策,最后利用停时理论对货源进行优化.     

A New 4× 4 AKNS Spectral Problem and Its Associated Integrable Decomposition of the AKNS Equation

A new approach to construct a new 4 × 4 matrix spectral problem from a normal 2 × 2 matrix spectral problem is presented. AKNS spectral problem is discussed as an example. The isospectral evolution equation of the new 4 × 4 matrix spectral problem is nothing but the famous AKNS equation hierarchy. With the aid of the binary nonlinoearization method, the authors get new integrable decompositions of the AKNS equation.In this process, the r-matrix is used to get the result.     

一类吸引玻色-爱因斯坦凝聚的坍塌性质

本文讨论出现在吸引玻色—爱因斯坦凝聚中的一类带调和势的阻尼非线性Schroedinger方程，对照玻色—爱因斯坦凝聚的物理性质，我们证明了其初值问题在有限时间内的坍塌性质。