超分辨相变光盘的膜层计算与分析

利用多层膜反射率的矩阵法计算了GeSbTe超分辨相变光盘的光学参数与各膜层厚度之间的关系，最后得到了较为理想的膜层厚度匹配。     

Chemical composition database establishment and metabolite profiling analysis of Yangyin qingfei decoction

The chemical fingerprinting and metabolite profile in a rat plasma sample after intragastric administration of Yangyin qingfei decoction (YYQFD, 14 g/kg) were investigated. First, YYQFD was analyzed by UPLC/Q‐TOF MS to establish the chemical composition database by comparing their retention behavior, accurate molecular mass and MS² data with those of references or known compounds in the literature. In this database, 100 chemical constituents with information on retention time, molecular mass, molecular formula, MS² data and compound name were identified, which can provide compound information for further metabolite profiling studies. Furthermore, 64 compounds including 37 prototypes and 27 metabolites were detected in the dosed rat plasma sample, and the metabolic pathways of YYQFD were hydrolyzation, hydroxylation, dehydrogenation, glucuronidation, glucosylation, sulfation and mixed modes. Among the five component herbs in the YYQFD, Glycyrrhizae Radix et Rhizome and Fritillariae Thunbergii bulbs were actively metabolized, contributing 16 and 7 metabolites, respectively. It is suggested that chemical characterization and metabolite profiling studies are valuable to elucidate the material basis of herbal preparations.     

Completely positive tensors in the complex field

In this paper, we introduce the complex completely positive tensor, which has a symmetric complex decomposition with all real and imaginary parts of the decomposition vectors being non-negative. Some properties of the complex completely positive tensor are given. A semidefinite algorithm is also proposed for checking whether a complex tensor is complex completely positive or not. If a tensor is not complex completely positive, a certificate for it can be obtained; if it is complex completely positive, a complex completely positive decomposition can be obtained.     

Synthesis and properties of phthalonitrile-terminated oligomeric poly(ether imide)s containing phthalazinone moiety

Three novel series of soluble and curable phthalonitrile-terminated oligomeric poly(ether imide)s containing phthalazinone moiety were synthesized from an excess amount of three dianhydrides and phthalazinone-based diamine, followed by reacting with 4-(3-aminophenoxy)phthalonitrile (APPh) in a two-step, one-pot reaction, respectively. The phthalonitrile oligomers containing phthalazinone moiety were cured in the presence of 4,4′-diaminodiphenylsulfone (DDS). The oligomers and the crosslinked polymers were characterized by DSC, FT-IR and elemental analysis. These phthalonitrile oligomers containing phthalazinone groups were found to be soluble in some aprotic solvents, such as chloroform, pyridine, m-cresol and N-methyl-2-pyrrolidone (NMP). The crosslinked polymers were insoluble in all solvents. The thermal properties of the oligomers and the crosslinked polymers were evaluated using DSC and TGA analysis. The phthalonitrile oligomers showed high glass transition temperatures (T_gs) in the range of 214-256 °C and high decomposition temperatures with 10% weight loss (T_d10%) ranging from 523 to 553 °C. The crosslinked polymers showed excellent thermal stability with the 10% weight loss temperatures ranging from 543 to 595 °C, but did not exhibit a glass transition temperature upon heating to 350 °C.     

2-甲基-3-(4-对甲氧基苯基)-5-(3-甲氧基苯基)异噁唑啉及其生物活性

采用1,3-偶极环加成反应合成了2-甲基-3-对甲氧基苯基-5-间甲氧基苯基异噁唑啉,分离了顺、反异构体,采用核磁共振氢谱分析表征了顺反异构体的谱图行为,对异构体的生物活性进行了测定,新杀菌剂2-甲基-3-对甲氧基苯基-5-间甲氧基苯基异噁唑啉对病菌的有效成分为反式结构,顺式体为无效成分.     

低功耗聚合物波导可调耦合器的优化设计

提出并研究了一种带隔热槽的马赫-曾德尔干涉结构聚合物波导可调耦合器。仿真分析了热光电极作用下有、无隔热槽的耦合器波导温度分布,表明设置隔热槽可以降低热光调谐所需的功耗。研究了铝电极作用下不同上包层厚度对光传输损耗的影响,确定了上包层厚度。根据隔热槽与电极之间距离对热光调谐功耗的影响,结合隔热槽对导波光模式的影响及波导制备工艺,确定了隔热槽的位置。最终设计的带隔热槽聚合物波导可调耦合器实现1～0的分束比所需功耗为2.20mW,是无隔热槽的47.4%。     

Effect of Si doping on near-infrared emission and energy transfer of Bismuth in silicate glasses

We have studied the effects of Si doping on the near infrared (NIR) luminescence observed in low Bi doped ( 0.1 mol% ) glasses and the energy transfer from Yb³⁺ to Bi. The broadband near infrared can only be observed when Si is introduced in the Bi-doped glass. The origin of this fluorescence can be attributed to Bi ions at low valence. Efficient energy transfer from Yb³⁺ to Bi NIR active ions is achieved by co-doping of Si. There is an increment of about ~ 29 times of the emission intensity from Bi-related active center as the Yb³⁺ concentration varies from 0 to 2.0 mol% and the amount of Si is 0.05 mol% under 980 nm excitation. The possible mechanism of energy transfer from Yb³⁺ to Bi is also discussed.     

Optical and Short- wavelength Recording Properties of Ag_8In_( 14) Sb_( 55) Te_(23) Phase-change Films

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Four kinds of raising and lowering operators ofn-dimensional hydrogen atom and isotropic harmonic oscillator

The factorization of the radial Schrödinger equation ofn-dimensional (n ≥ 2) hydrogen atoms and isotropic harmonic oscillators was investigated and four kinds of raising and lowering operators were derived. The relation betweenn-dimensional (n ≥ 2) and one-dimensional hydrogen atoms and harmonic oscillators was discussed.     

Novel phthalazinone‐bearing tetrafunctional epoxy: Synthesis,characterization, and their toughening application for TGDDM system

A novel tetrafunctional epoxy (TEPZ) was synthesized by “one spot two steps” method, and the effects of solvents, reaction temperature, and mole ratios of reactants on the reaction conversion were systematically investigated. The results demonstrated that the solvents participating in the reaction were the most crucial factor for high conversions. After curing, TEPZ/4,4′‐diaminodiphenyl sulfone (DDS) system exhibited better thermal stability compared with famous N,N,N′,N′‐tetraglycidyl‐4,4′‐diaminodiphenyl methane (TGDDM)/DDS analog. When TEPZ is blended with TGDDM/DDS, the initial decomposition temperature of TGDDM/TEPZ/DDS hybrid elevated from 348°C to 362°C. The storage modulus and the glass transition temperature were sensitive to curing procedure and concentration of DDS. While the system consisted of 100 phr TGDDM, 30 phr TEPZ, and 40 phr DDS, the storage modulus and glass transition temperature increased significantly compared with those of TGDDM/DDS, and the impact strength increased by 31.6% simultaneously. Such enhancement could be ascribed to the structural feature of phthalazinone in TEPZ, which formed stable interpenetrating networks during thermal cure procedure.