基于联系数a+bi理论的学生综合素质评价方法

在学生综合素质评价中,往往受人为主观因素和不确定因素的影响,使评价出现诸多弊端。运用联系数a+bi理论,提出了一种新的学生综合素质评价方法,并建立相应评价模型。该模型方法避免了其他评价方法的弊端,而且能够保证评价的客观、公正。最后通过实例验证了该方法的有效性和正确性。     

Wavelet bi‐frames with uniform symmetry

Wavelet bi‐frames with uniform symmetry are discussed in this paper. Every refinable function in the bi‐frame system is symmetric, which is very useful in the image processing and curve and surface multiresolution processing. By the aid of the lifting scheme, bi‐frame multiresolution algorithms can be divided into several iterative steps, and each step can be shown by a symmetric template. The template‐based procedure is established for constructing bi‐frames with uniform symmetry and N > 2 generators. In particular, we take the bi‐frame with three generators as an example to provide a clearer picture of the template‐based procedure for constructing bi‐frames. Three types of bi‐frames with three generators are studied, and some examples with certain smoothness are constructed. These examples include some bi‐frames with interpolating property. Copyright © 2016 John Wiley & Sons, Ltd.     

Existence of solutions for some non‐Fredholm integro‐differential equations with the bi‐Laplacian

We prove the existence of solutions for some semilinear elliptic equations in the appropriate H⁴ spaces using the fixed‐point technique where the elliptic equation contains fourth‐order differential operators with and without Fredholm property, generalizing the previous results.     

Synthesis,Reactions, Characterization and Biological Evaluation of 2,3′‐Bipyridine Derivatives (III)

1‐Pyridin‐3‐yl‐3‐(2‐thienyl of 2‐furyl)prop‐2‐en‐1‐ones 1a , 1b reacted with 2‐cyanoethanethioamide 2 to afford the corresponding 4‐(thiophen‐2‐yl or furan‐2‐yl)‐6‐sulfanyl‐2,3′‐bipyridine‐5‐carbonitriles 3a , 3b . The synthetic potentiality of compounds 3a , 3b were investigated in the present study via their reactions with several active halogen containing compounds 4a , 4b , 4c , 4d , 4e , 4f , 4g , 4h , 5 , 5a , 5b . Our aim here is the synthesis of 4‐(2‐thienyl or 2‐furyl)‐6‐pyridin‐3‐ylthieno[2,3‐b]pyridin‐3‐amines 6a , 6b , 6c , 6d , 6e , 6g , 6h , 6i , 6j , 6k , 6l , 6m , 6n ,via 6‐(alkyl‐thio)‐4‐(2‐thienyl or 2‐furyl)‐2,3′‐bipyridine‐5‐carbonitriles 5a , 5b , 5c , 5d , 5e , 5i , 5j , 5k , 5l , 5m . The structures of all newly synthesized heterocyclic compounds were elucidated by considering the data of IR, ¹H‐NMR, mass spectra, as well as that of elemental analyses. Anti‐cancer, anti‐Alzheimer, and anti‐COX‐2 activities were investigated for all the newly synthesized heterocyclic compounds.     

一种二帽pseudo-Keggin结构簇合物[HN(C_2H_5)_3]_3[N(C_2H_5)_3]_2[Mo_8~ⅣMo_4~ⅤV_2~ⅣO_(38)(PO_4)]的水热合成、结构和性质研究

金属－氧簇合物因其结构多样性及在催化、材料和医药等方面的应用而引起人们的关注犤１犦。在众多金属－氧簇合物中，Keggin结构及金属取代Keggin结构金属－氧簇被大量报道，但由于很难获得高质量单晶，有关二帽Keggin结构的报道非常少，目前只有几例报道犤２～９犦。近年来，随着水热法应用到金属－氧簇的合成，陆续获得了一系列具有新颖结构的簇合物。１９９８年，通过水热法获得了第一个二帽pseudo－Keggin结构簇合物犤NH４犦４H犤PMo８VⅣ４VⅤ２O４２犦·２４H２O犤１０犦。我们用水热法以三乙胺做模板剂获得了一种全新的二帽pse…     

酚酞型聚芳醚砜——Ⅱ.侧基结构对Cardo双酚聚合反应性的影响

基于在“一步法”聚合反应过程中发现的酚酞对反应有特殊的“自催化”作用,本文合成了几种具有与酚酞类似结构的Cardo双酚,并通过对其聚合反应规律的研究,进一步探讨“自催化”作用的本质。实验结果表明,这类Cardo双酚也较普通结构双酚更易于进行异相成盐反应,表现为其聚合反应速度的明显加快。     

Hole-polarons and bipolarons in the Holstein t − J model: Relevance of inter-site hole-phonon interaction

The interaction of the doped holes with lattice vibrations in an antiferromagnetic (AF) background is studied using the $t?J$-Holstein model on an 8-site cluster with 2-holes by an exact method. The phonon mediated interactions between the holes at nearest-neighbor (NN) sites are considered. We have calculated the effective kinetic energy, hole-phonon and hole–hole correlations, two hole binding energy to study the nature and stability of various quasiparticles. At negligible to very weak hole-phonon ($h?ph$) couplings, the holes get dressed by the AF background forming spin-polarons. At weak to intermediate $h?ph$ couplings, the holes are dressed by the phonon cloud forming large hole-polarons and/or nearly free hole-polarons. A narrow transition region is observed at intermediate $h?ph$ coupling depending on phonon energy, which marks the formation of S1 hole-bipolarons and small-hole-polarons. At strong coupling regime, stable hole-bipolarons are formed which may lead to superconducting condensation. We also argue that these results cannot be completely reproduced by considering pure attraction between holes. Results show the relevance of inter-site $h?ph$ coupling in high $T_c$ cuprates.     

城市电网的分层优化模型及其应用

根据城市电网的结构特点，采用结构化设计理论，提出供电网规划的分层优化模型，并在城市电网设计中得到应用     

双圆弧齿轮测量的研究

通过对石油机械制造业中双圆弧齿轮检测现状的分析和研究,提出一种“双圆弧齿轮多参数测量仪”,该仪器有三个自由度,各自由度可单独或相互配合运用,能测出双圆弧齿轮的多种重要参数,可解决当前该种齿轮检测中存在的问题;简述了该仪器进一步发展的潜力。     

Ein neues makrobicyclisches Wirtmolekül-Synthese und ANS-Komplexierung

The synthesis of the new host molecule1b is described. Its complexation properties towards 1,8-ANS as a guest are reported. Compared to the monomacrocyclic host molecules2c and2e, the complex stabilities of1b with ANS as a guest are particularly higher, suggesting that the macrobicyclic host forms a better fitting niche to allow the nestling of guest molecules in solution.