Wave Function of Contract-Expanding Universe

It is shown that the wave functions of a contract-reexpanding universe may be constructed in two different ways corresponding to different boundary conditions in superspace and both may offer satisfactory inflationary scenario.     

人工神经网络方法用于肺癌的辅助诊断

根据人发和血清中微量元素的含量,将人工神经网络(ANN)用于正常人与癌症患者的分类预测.用独立预测样本作了检验,表明该方法可作为肺癌诊断的一种辅助手段.讨论了当预测样本中有元素缺损时ANN的分类预测情况,并研究了人发和血清样品中的元素对分类预测的影响.     

Novel 2,4-Diarylaminopyrimidine Derivatives Containing Pyridine Moiety:Design,Synthesis,Crystal Structure and Biological Evaluation

A series of 2,4-diarylaminopyrimidine derivatives containing pyridine structure were designed and synthesized.The crystal structures of compounds 5d and 5e were obtained from X-ray diffraction.The crystal structure of 5d (C₂₅H₂₀Cl FN₆O₂) belongs to the monoclinic system,space group P2₁/c with a=11.0500（10）,b=18.3045（17）,c=13.5646（9）?andβ=122.806（5）°.5e (C₂₅H₁₉Cl F₂N₆O₂) is of monoclinic ...     

梳状高分子固体电解质的二级玻璃化转变及离子传输研究

研究了交替马来酸酐共聚物多缩乙二醇酯(CP350)-LiSCN配合物的热行为及离子传输特性。实验表明: CP350/LiSCN配合物在所研究[Li]/[EO]配比范围呈均相无定形并具有二级玻璃化转变。两种玻璃化转变温度均随盐含量的增加而上长。离子电导率随盐浓度的变化而出现一极大值, 室温电导率最大可达2.19×10^-^5s/cm。导电行为符合VTF方程。     

无水稀土氯化物的新制备方法: 从稀土氧化物出发制备无水稀土氯化物

本文报道从稀土金属氧化出发, 在THF中与TMSCl/CH3OH反应, 制备无水稀土氯化物LnCl3.nTHF的方法。此法具有产物纯度高, 产率好, 制备条件温和, 操作方便等优点, 因而具有一定的实用性。     

An Impurity in One-Dimensional Interacting Fermion

The bosonization method is applied to the problem of the one-dimensional interacting fermion system with an impurity. The phase transition at zero temperature of this system is investigated by the renormalization group method.     

A Novel Structure Observed on the Phospholipid Langmuir-Blodgett Bilayer by Atomic Force Microscopy

A novel roundish objects were observed directly by means of atomic force microscopy to be formed on dimyristoylphosphatidylcholoine (DMPC) Langmuir-Blodgeet bilayer films. The roundish structure may be resulted from the aggregation of DMPC molecules because of the collapse of DMPC liposomes formed on the interface of water/organic phase when they lose the water support.     

Collisionless Trapped Ion Temperature Gradient Instabilities

Under the fluid limit, the collisionless electrostatic trapped ion temperature gradient instabilities are investigated by retaining the trapped ion parallel compressibility in the long wavelength limit. The two-scale analysis should be employed in view of the fact that the eigenfunctions vary over the connection width scale with an envelope varying over a secular scale. The results show that the slab branch of trapped ion modes, corresponding to the aperiodic trapped ion instability discovered by Kadomtzev, propagates along ion diamagnetic direction. The toroidd branch is also obtained in low-frequency and long wavelength limit. In this case, besides the unstable one propagating in ion diamagnetic direction, there exists a marginally stable toroidal odd mode propagating in electron diamagnetic direction. The eigenfrequencies and perturbative structures of these unstable modes are given analytically and numerically. The numerical results are in good agreement with the analytical ones.     

1-芳基-5-苯并三唑基-1-戊烯的合成及其位置异构体的GC-MS研究

本文研究了1-芳基-5-苯并三唑基-1-戊烯(3和3')的两种通用合成方法, 并用色谱-质谱联用仪分析了四种不同异构体的组成。根据其MS谱图中[M-29]^+^·及[M-57]^+^·峰的强度, 可以方便地区分1-N和2-N烷基化产物。     

预辐射苯乙烯形成过氧化物组分结构及其引发活性研究

本文研究了苯乙烯在空气存在下的γ辐照。用硅胶柱层析分离在辐射总剂量为5×10^4Gy, 辐射剂量率分别为2.9, 0.7, 0.5和0.3Gy/s的条件下形成的过氧化物,发现剂量率在0.5Gy/s以上时产物都可分成三种组分, 而组分布随剂量率不同而异。当剂量率为0.3Gy/s时, 产物只包含单一的, 相当于第二组分的过氧化物。对剂量率为0.7Gy/s时生成的三种过氧化物组分用红外光谱, 核磁共振谱和质谱进行了组分结构测定及其引发活性测定, 发现具有交替结构的第二组分有较强发引发活性, 它在较低温度和较短时间内就能引发苯乙烯聚合, 获得分子量166578的聚合物。它还能引发其它乙烯类单体聚合, 且聚合过程较用BPO引发剂平稳。