FAFFA加速的PO-MM研究复杂金属载体上线天线电磁特性

本文提出了一种快速远场近似(FAFFA)加速的混合物理光学矩量法(POMM),利用FAFFA加速计算矩阵方程中的矩阵矢量积,明显提高了计算效率.对物体表面上的远场组之间的耦合作用推导出了一组简洁的计算公式,并分析了计算复杂度.复杂金属组合体上线天线输入导纳、互导纳和方向性图的计算结果与文献结果一致.利用该方法分析计算了一个舰船模型上线天线的电磁特性.数值结果表明了这种方法的正确性和工程应用中的有效性.     

固载于SBA-15分子筛中的同双核金属配合物催化剂

合成了3种同双核金属配合物[M2LCl3]Cl(L代表配体三亚乙基四胺,M代表Co,Cu,Cr),采用微波加热法合成了SBA-15分子筛,采用浸渍法将3种同双核金属配合物分别固载在表面官能化的SBA-15分子筛(SBA-15-NH2分子筛)中制得负载型催化剂。傅里叶变换红外光谱、X射线衍射、紫外可见光谱和热分析表征结果表明,同双核金属配合物被固载后,其结构仍保持完整。以环己烷氧化反应为探针反应,考察了[Co2LCl3]Cl/SBA-15-NH2,[Cu2LCl3]Cl/SBA-15-NH2,[Cr2LCl3]Cl/SBA-15-NH2催化剂的活性,环己烷转化率分别为11.0%,49.5%,57.9%;对于[Cr2LCl3]Cl/SBA-15-NH2催化剂,当分别以乙睛、丙酮和冰醋酸为溶剂时,环己烷转化率分别为57.9%,52.1%,34.2%,3次重复实验的环己烷转化率分别为57.9%,47.8%,46.5%,表明该催化剂具有较好的活性和重复使用性。     

复杂小断块油藏CO2吞吐工艺技术分析

在总结复杂小断块油田CO2吞吐系列配套技术的基础上，分别从油藏规模、物性、能量等角度剖析了71口吞吐井的实施效果，分析了影响CO2吞吐效果的关键参数，得出了注入量、注入压力、返排速度、吞吐周期等工艺技术参数的取值范围和标准，对提高采收率具有重要意义。     

Optical data storage by novel photoelectrochromic polymer

A novel elastic polymer containing 4,4′-bipyridinium salts with tetrakis[3,5-bis(trifluoromethyl)phenyl]borate as part of the main chain was synthesized. The cast film showed persistent and reversible colour changes due to photoinduced electron transfer upon excitation of an ion-pair charge-transfer band (_ex >365 nm) in vacuo. The lifetime of the coloured state markedly depended on temperature. The optically written data were stored without decay below 0°C and were erased thermally at elevated temperatures. The colour changes were reversibly repeatable for many times.     

稀土溶液标准物质的研制

选择7种稀土元素:La、Ce、Sm、Eu、Yb、Lu、Y为研究对象,采用高纯稀土氧化物(≥99 99%)为原料,经ICP MS及ICP AES对纯度进行分析后,分别制备成浓度为1000μg mL的稀土溶液标准物质。采用准确、可靠并能溯源的EDTA络合滴定法进行量值核对、均匀性及稳定性检验。对标准物质的不确定度进行了全面的评定。研制的稀土溶液一级标准物质,总不确定度优于0 6%,稳定性达两年以上。     

Procedure for the evaluation of the accumulation of defects in metallic structural materials under complex elastoplastic loading

Within framework of the continual fracture mechanics, we describe the engineering approach to the assessment of scattered microdamage accumulation kinetics in metallic materials under elastoplastic loading conditions in case of plane stressed state. Automatized experimental stand and the respective investigation technique are discussed. The stand has been developed based on modification of the UMé-10T electromechanic test machine. State-of-the-art computer technologies and microprocessing hardware are incorporated in the stand automation. We present the technique of experimental assessment of damage accumulation kinetics in metallic structural materials under complex elastoplastic loading conditions with account of two different fracture (cleavage and shear) processes, which technique is based on measuring the specific electric resistance of the specimen. __________ Translated from Problemy Prochnosti, No. 1, pp. 128–137, January–February, 2006.     

有机镍化合物催化烯烃聚合的研究进展

综述了有机镍化合物如烯丙基镍、乙酰丙酮镍、茂镍、二亚胺镍等催化烯烃聚合的研究进展。有机镍化合物可催化烯烃、α-烯烃(如乙烯、丙烯等)的齐聚及聚合、催化极性单体(如甲基丙烯酸甲酯、降冰片烯等)以及位阻较大的环烯烃、取代二烯烃、苯乙烯等的均聚和共聚。     

纺织机械零件CAPP技术的应用研究

要提高产品的竞争能力，必须在企业中加大CAPP的应用力度，笔者通过应用思普CAPP系统（SIPM/CAPP）编制纺织机械零件工艺文件的实践，证明了在企业中应用CAPP是提高产品的市场竞争能力，提高企业工艺快速反应能力的有力工具。     

Preparation of monodisperse poly(vinyl alcohol) microspheres by heterogeneous surface saponification and iodine complex formation

Monodisperse poly(vinyl acetate) (PVAc) microspheres with high molecular weight obtained by suspension polymerization of vinyl acetate were saponified in alkaline aqueous solution to keep their spherical structure. The saponification was restricted on the surface of the PVAc microspheres and obtained particles had skin/core structure. Various poly(vinyl alcohol) (PVA) microspheres with different diameters and degrees of saponification (DSs) were obtained. The conversion of PVAc to PVA during the heterogeneous surface saponification time were examined by nuclear magnetic resonance spectroscopy and after 72 h hydrogel type PVA microspheres completely saponified were obtained. The crystal melting temperatures of the microspheres obtained by the saponification were measured a constant value of 238°C irrespective of varying DS, and the peaks became enlarged as reaction time. Iodine complexes were formed in saponified microspheres with DS of 41% and 99% by immersing them in I₂/KI aqueous solution and decomposed by the reduction of I₂ in the complexes to 2I^? using sodium sulfite to confirm whether the skin formed through the saponification was composed of PVA with high VA content. Obviously, characteristic blue color developments owing to I₅^?‐PVA complexes were observed in both saponified regions and a red in the PVAc core. Consequently, it was concluded that the PVA skins formed by heterogeneous surface saponification had high DSs. Such complexes endowed polymeric microspheres a good radiopacity which would be useful in clinical treatment of vascular diseases and were examined by X‐ray irradiation image. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Preparation and characterization of metal-complex imprinted PVDF hollow fiber membranes

Using nickel-2,2′-dipyridyl complex as a template, N-vinyl-2-pyrrolidone as the metal coordination functional monomer, and ethylene glycol dimethacrylate as the crosslinker, polyvinylidene fluoride (PVDF) hollow fiber ultrafiltration membrane as the supported membrane, metal complex imprinted polymeric membranes were prepared. The association constant of template-monomer interaction in the prepolymerization solution was estimated to be 4.38 × 10⁴ (L/mol)² by spectrophotometric titration analysis. The attenuated total reflection Fourier transform infrared spectroscopy and scanning electron micrograph characterization indicated that the surface of the support PVDF membrane was completely coated by the imprinted polymer layer after modification. The imprinted membranes exhibited the selective permeability for the template in certain nickel acetate solution. The molecularly imprinted membranes gave higher permeation separation factors at about pH 6, whereas increasing pressure would lower the separation ability. The effects of ion concentration, cations and counterions, ligand selectivity, pH, and trans-membrane pressure were investigated and the permeation performances of the imprinted membranes could be regarded as facilitated transport mechanism. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008