Orlicz空间的近端点和近严格凸性

本文给出了Orlicz函数空间中近端点的判别准则,近而推出了Orlicz函数空目近严格凸性的判别准则.另外,本文还直接给出Orlicz序列空间近严格凸的判别准则.     

电压调制变色有机电致发光器件中的能量传递

研究了不同掺杂浓度下PVK：Rubrene的光致发光及电致发光的特性。发现掺杂浓度较低的PVK：Rubrene的光致发光与电致发光有较大差别,这是Foerster能量传递及电致发光中陷阱中的电子对空穴的吸引作用使得PVK激子在光致发光和电致发光中的复合速率不同造成的。同时各掺杂浓度在5wt%以下的PVK：Rrbrene发光随电压的增加呈现变色,这是能量传递不完全时,未参与能量传递的PVK激子复合速率随电压升高增大的结果。     

Predissociation Dynamics of B State of Methyl Iodide with Femtosecond Pump-probe Technique

The predissociation dynamics of B Rydberg state of methyl iodide is studied with femtosecond two-color pump-probe time-of-°ight spectra at pump pulse of 400 nm and probe pulse of 800 nm. The dominant product channels are the CH3I+ and CH3+ formation. The time-dependent signals for CH3I+ and CH3+ ions are obtained. Both of the signal curves can be ˉtted by biexponential decays with time constants of ?1 and ?2, ?1 is assigned to the lifetimes of high Rydberg states, which can be accessed by absorbing three 400 nm pump pulses and ?2 re°ects the dynamics of B Rydberg state, which is accessed with two pump pulses. The lifetime of B Rydberg state is determined to be about 1.57 ps, which is incredibly consistent with the previous studies. The results were interpreted as a multiphoton dissociative ionization processes.     

A Facile Enantioselective Reduction of Acetylferrocene with Chiral Sodium Hydroboro—L—prolinate

IntroductionChiral ferrocene and their derivatives have at-tracted much attention of some researchers workingin the fields of asymmetric synthesis and nonlinearoptical material. In asymmetric catalysis,chiralferrocenyl phosphine and ferrocenyl amine are ex-cellent chiral ligands in the asymmetric hydrogena-tion,asymmetric allylic substration,asymmetricaldol reaction and asymmetric Michael additionetc.[1— 6] . While the starting material used to syn-thesize the chiral ferrocene is optically ac…     

美索巴莫在［BnMIM］PF6修饰碳糊电极上的电催化氧化及电分析方法

研究了美索巴莫（MET）在离子液体1-苄基-3-甲基咪唑六氟磷酸盐［BnMIM］PF6修饰碳糊电极（［BnMIM］PF6/CPE）上的电催化氧化行为和电化学动力学性质,并用循环伏安法（CV）、计时电流法（CA）测得MET在［BnMIM］PF6/CPE上的电极反应过程动力学参数。实验结果表明,MET在［BnMIM］PF6/CPE上发生了受扩散控制的不可逆电化学氧化过程。用方波伏安法（SWV）测得MET氧化峰电流（Ipa）与其浓度在3.0×10-5~1.0×10-2 mol?L-1范围内呈良好线性关系,检出限（S/N=3）为3.3×10-6 mol?L-1。同时运用SWV法对市售美索巴莫片进行电化学定量测定,RSD为1.5%~2.5%,加标回收率为98%~99%。     

一种基于WebGIS的导航系统的设计与实现

设计并实现了一种基于万维网地理信息系统(webGIs)的电子导航系统．该系统选用Maphfo作为Gls开发平台,并将最短路径椭圆算法运用到电子导航的路径选取当中．由于使用GIS技术,系统不仅能够方便地以图形方式输出导航路线,而且增添了对地理图形和空间数据进行管理的若干功能．     

1，1-二（苯并咪唑-2-基）-2-（N-乙基咔唑-3-基）乙烯的合成及其性能研究

以六氢吡啶为催化剂,通过Vilsmerier-Haack和Knoevenagel反应合成了一种新型的芳稠杂环化合物1,1-二（苯并咪唑-2-基）-2-（N-乙基咔唑-3-基）乙烯,产率为72.53%。利用元素分析、FT-IR、UV-Vis、¹H NMR、溶液和固体荧光光谱、循环伏安（CV）分析、TG-DTA热分析研究了产物的结构、光学特性、电化学特性和热稳定性。该化合物在DMF、DMSO和DCM 3种溶剂的稀溶液中均具有290 nm和375 nm两处紫外吸收峰以及470 nm处的蓝绿色荧光发射。不同DMSO和DCM体积比的混合溶剂的溶液荧光表明,该化合物具有明显的AIE荧光效应。固体荧光光谱表明,产物在327 nm和436 nm有两处激发峰,最大发射峰位于484 nm,相 比于溶液荧光发生了红移现象。由循环伏安测试结果计算获得产物的能隙为2.79 eV,电离势为5.43 eV,电子亲和势为2.85 eV,表明产物具有良好的电子传输能力。TG/DTA测试结果显示目标产物具有良好的热稳定性。     

Synthesis of double-hydrophilic double-grafted copolymers PMA-g-PEG/PDMA and their protein-resistant properties

A series of double-hydrophilic double-grafted PMA-g-PEG/PDMA copolymers, which contained poly(methacrylate) (PMA) as backbone, poly(ethylene glycol) (PEG) and poly(N,N-dimethylacrylamide) (PDMA) as side chains synthesized successfully by using reversible addition-fragmentation chain transfer (RAFT) polymerization and atom transfer radical polymerization (ATRP), were used as physical coatings for the evaluation of protein-resistant properties by capillary electrophoresis (CE). Electroosmotic flow (EOF) measurement results showed that the PMA-g-PEG/PDMA copolymer coated capillaries could suppress electroosmotic mobility in a wide pH range (pH = 2.8–9.8) and EOF mobility decreased with the increase of copolymer molecular mass and PDMA content. At the same time, protein recovery, theoretical plate number of separation and repeatability of migration time demonstrated that antifouling efficiency was improved with the increase of molecular mass and PEG content.     

ρ~-混合序列部分和最大值的一些不等式和强大数律的收敛速度(英文)

In this paper,we establish a Rosenthal-type inequality of partial sums for ρ~mixing random variables.As its applications,we get the complete convergence rates in the strong laws for ρ~-mixing random variables.The result obtained extends the corresponding result.     

耦合Burgers方程的Painleve分析和相关性质

为研究耦合Burgers方程的可积性,利用WTC测试方法,给出了第一类Burgers方程的Painleve性质和第二类Burgers方程的条件Painleve性质．进而得到了第一类方程的变量分离解和第二类方程的（N2＋3N＋6/2）-参数Lie点对称群．