属性合成区间值信息系统的0-1形式背景研究

区间值信息系统是常见的信息系统之一。针对相同论域上的区间值信息系统给出属性合成的区间值信息系统;将形式背景的基本理论引入到合成区间值信息系统中,讨论利用子形式背景直接构造原形式背景;进而研究子形式背景与原形式背景下协调集之间的关系,给出原形式背景下同构概念格的构造方法;最后利用实例验证相关结论。

属性层次模型在高校专业设置决策中的应用

增强专业竞争力、合理调整专业配置是高等学校优化教育资源、发挥最大教学效益的手段.以师资力量、学科区位、市场需求、教学条件、资金投入为评价标准的专业设置模型,依据学校实际选取了三个备选专业进行决策,求得了各专业的合成权重.模型建模与求解过程简单,不需要求解矩阵的特征根和特征向量,也不要求一致性检验.

结合多尺度特征和多维注意力的人脸风格转换

针对StarGANv2模型生成的人脸图像存在风格重建效果不佳、人脸纹理不够自然等现象,该文提出结合多尺度特征和多维注意力的人脸风格转换模型.1)将多尺度特征融合模块PSConv嵌入StarGANv2生成器内,提高了模型对图像特征的提取能力;2)提出了多维注意力模块MDConv,并将该模块嵌入StarGANv2判别器内,从而提高了模型对真假人脸图像的判别能力.与StarGANv2方法在CelebA-HQ数据集上进行对比实验的结果表明:该方法生成的人脸图像风格更美观,纹理细节更自然,学习感知图像相似度(LPIPS)的值也得到了提升.

一种利用商空间方法的优化测试用例集生成算法

在对软件系统进行测试时,由测试需求创建的测试用例集往往数量庞大且存在冗余,为了提高测试效率,降低测试成本,需要优化测试用例集.因此基于商空间理论,提出一种优化测试用例集生成算法:利用测试需求间的相互关系,首先运用商空间理论中的属性投影法进行测试用例集的分解,再运用商空间理论中的属性合成法对分解所得的测试用例商集进行合成,同时采用半序结构来描述测试用例子集之间的关系,从而最终在合成结果中通过简单的选择即可得到优化测试用例集.先通过理论证明了该算法的有效性;再通过仿真实验模拟该算法在不同情况下的约简效果,不仅进一步验证该算法在测试用例集约简上的优势,而且得出影响该算法约简效果的两个因素.

合成集值决策表的属性特征

基于集值信息系统上的拟序关系讨论了集值决策表的合成,对合成集值决策表的相关属性特征进行了研究,进一步给出了对象合成集值决策表和属性合成集值决策表及其属性特征。

多粒度的图像检索方法研究

从商空间粒度理论角度分析了图像检索的过程,给出了基于商空间的多粒度图像检索方法。首先根据等价关系R(即图像主色的连通性)将图像划分为不同的区域,然后分别从颜色、形状、空间分布等不同的粒度提取区域的特征属性,利用商空间多粒度属性函数合成思想,将每个粒度下的属性函数合成,形成图像的特征向量,再根据此特征向量计算图像之间的相似度进行检索。实验结果表明,多粒度属性函数合成的检索方法要明显优于单一属性函数下的检索方法;与MTH方法和颜色体积直方图方法相比,其能够更加准确和高效地查找出用户所需要内容的图像,明显地提高了检索精度。

Synthesis of magnetically modified palygorskite composite for immobilization of Candida sp. 99–125 lipase via adsorption

Magnetically modified palygorskite composites were synthesized with γ-Fe2O3 dispersing on the external surface of clay mineral. The magnetic clay was characterized with Fourier transform infrared, X-ray diffrac- tion, transmission electron microscopy, and vibrating sample magnetometer. Candida sp. 99-125 lipase was immobilized on magnetic palygorskite composites by physical adsorption with enzyme loading of 41.5 mg· g^-1 support and enzyme activity of 2631.6 U· （g support）^-1. The immobilized lipase exhibit better thermal and broader pH stability and excellent reusabilitV compared with free lipase.

Property Identification of Anomalous Seismic Bodies by GMES Techniques, A Case History

What are the anomalous seismic reflection bodies at depths of over 6000m？Are they reefs or igneous rock？This is a difficult problem for seismic techniques,but the GMES technique can handle it .The GMES technique is a joint exploration technique combining gravity,magnetic,electrical,and seismic techniques.The specific procedure is to conduct a 2D interface-constrained CEMP inversion using 2D seismic and log data followed by a property parameter inversion of the anomalous bodics using gravity and seismic data by the stripping technique.We then estimate the physical properties ofthe anomalous bodies,such as density,susceptibility,resistivity,velocity,and etc.to deduce the geological features of the bodies and provide a basis for drilling decisions.The work in the TZ area reported in this paper shows the applicability of the technique.

Optical Reskponse of Metal—Dielectric Composite Containing Interfacial Layers

A phenomenological approach to investigate the effect of interfacial layers on the absorption of metal-dielectric composite at elevated temperatures is put forward by making use of a model in which weakly nonlinear spherical metallic particles with linear concentric shells are randomly embedded in a linear host. Corresponding formulae in terms of the interfacial factor are derived in detail by incorporating Taylor expansion and Drude model. We take composite as numerical calculation. It is concluded that such absorption is dependent not only on the temperature, but also on the properties of interfacial layers. Many other interesting phenomena are shown.

STUDY ON SYNTHESIS AND RELAXIVITY OF PARAMAGNETIC POLYESTER METAL COMPLEXES FOR MRI

Fifteen new polyester ligands were prepared by copolymerndion Of EDTA(ethylenediaminetetraacetic acid ) dianhydride or DTPA (dikthylenetriaminepenlaacetic acid) dianhydrtde and dihydric alcohol or dihydric phenol. Theirparanzagnetic metal complexes were also synthesized. All polyester ligands andmetal complexes were characterized by IHNMR, IR spectra and elemental analyses. Preliminary study showed that the polyester .metal complexes had higher relaxation effectiveness as compared to corresponding small molecular metal complexes.

Synthesis and extractive properties of bisthiophosphorylimines

Novel transition metal complexes of bis(diarylsubstitutedthiophosphoryl)imines ligand derived from O,O-di(p-methoxylphenyl)thiophosphoryl chloride and O,O-di-(p-methoxylphenyl)thiophosphoryl amine with Cu(Ⅱ ),Co( Ⅱ) ,Ni( Ⅱ) ,Fe(Ⅱ ) and Mn( Ⅱ ) were synthesized. The formation mechanism of complexes and their stereochemistry structures were investigated according to elemental analysis,infrared spectra and 31P-nuclear magnetic resonance spectra. The extractions of the ligand for different divalent metal ions,such as Zn(Ⅱ ),Cd( Ⅱ) ,Cu( Ⅱ) ,Ni( Ⅱ ),Fe( Ⅱ) ,Sn( Ⅱ) ,Mn( Ⅱ) ,Pd( Ⅱ) ,Hg( Ⅱ) and Fe(Ⅲ),were investigated in sulphate solution,respectively. The results show the metal atom is coordinated by 4 sulfur atoms in a square-planar fashion,and the titled compound has not only powerful ability to coordinate with cadmium from aqueous solution with a high extractive rate about 61.20% and a relatively weak complexation for other divalent metals with the extractive rate from 2.46% to 36.66%,but also a good selectivity to Fe(Ⅲ ).

Synthesis Antimicrobial Activity of p-Dimetyl-Amino-Benyzlaldehide Shift Base of α-NaftyI-Amine and Metal Complexes

A new Shift bases was synthesized by the reaction of p-dimetyl-amino-benzylaldehide and α-naftyl-amine. All synthesized compounds were characterized by elemental analysis, IR （infra red） spectroscopy and NMR （nuclear magnetic resonance） spectroscopy and evaluated for their in vitro antifungal activities of the compounds tested against Pseudomonas aeruginosa, Mycobacterium lacticolium, Aspergillus niger, Cladasporium resinale, Penicillium chrosegenum, Chastorniurn gloloodium and Trichoderma virideh. These derivatives have vast range of biological activities which benefit us.

Synthesis and Characterization of N,N＇-bis（Salicylidene） Ethylenediamine： Study of Extractives Properties Versus the Copper （11） in Sulphate Medium

The synthesis and characterization of N,N＇-bis（salicylidene） ethylenediamine, Salen said that were carried out. The behavior of this ligand has been studied in solution in solvent homogeneous and heterogeneous systems in sulphate medium. The use of pH-metric titration, GRAN and JOB＇s methods have permitted the determination of different parameters governing the behavior of Salen in solution such as the acidity constant, the stability constant, the nature of the interaction solvent-solute, the solvation number, the stoichiometry of extracted complex etc.. Then the extraction of the Salen was finally undertaken to words the copper （II） sulfate medium. The pH of complexation, extraction time, the number of protons exchanged and the number of ligands have been finally determined.

Novel Synthesis Method of Nonst0ichiometric Na2-xlrO3 Crystal Structure, Transport and Magnetic Properties

Transition metal oxides with 4d or 5d metals are of great interest due to the competing interactions, of the Coulomb repulsion and the itineracy of the d-electrons, opening a possibility of building new quantum ground states. Particularly the 5d metal oxides containing Iridium have received significant attention within the last years, due to their unexpected physical properties, caused by a strong spin orbit coupling observed in It（IV）. A prominent example is the Mott-insulator Sr2IrO4. Another member of this family, the honeycomb lattice compound Na2IrO3, also being a Mott-insulator having, most probably, a Kitaev spin liquid ground state. By deintercalating sodium from Na2IrO3, the authors were able to synthesize a new honeycomb lattice compound with more than 50% reduced sodium content. The reduction of the sodium content in this layered compound leads to a change of the oxidation state of iridium from ＋ IV to ＋ V/＋ VI and a symmetry change from C2/c to P-3. This goes along with significant changes of the physical properties. Besides the vanishing magnetic ordering at 15 K, also the transport properties changes and instead insulating semiconducting properties are observed.

Synthesis and host-guest properties of pillar[6]arenes

A facile method for the synthesis of pillar[6]arenes was developed. A series of pillar[6]arenes were prepared with FeC13 as catalyst and chloroform as solvent at room temperature in moderate yields （30%-40%）. Their host-guest properties with n-cetyltrimethyl ammonium bromide were investigated by 1 HNMR. The results showed that high selectivity in the host-guest relationship became apparent between pillar[6]arenes and pillar[5]arenes based on the different size of the inner cavity.

Properties of CaB_6 single crystals synthesized under high pressure and temperature

Pure CaB6single crystals are synthesized under high pressure (1 GPa) and temperature (1050°C). The temperature-dependenceof electric resistivity and Hall coefficient from 2 to 300 K shows that the CaB6single crystals are conductors withsemi-metallic behavior and electron carriers. Band structure calculations indicate that the conduction and valence bands meetat the X point at the Fermi level, which is consistent with the experimentally determined conducting behavior of CaB6singlecrystals. Calculations of state density suggest that the states at the Fermi level originate from the 2p orbital of the B atoms andthe 3d orbital of the Ca atom. Magnetization measurements show the paramagnetic nature of the CaB6. The micro-hardness ofCaB6is 24.39 GPa, and the Raman spectra of CaB6yield three sharp peaks at around 780.9, 1138.9, and 1282.1 cm 1for T2g,Eg, and A1g, respectively. The specific heat of the crystal is measured and found to be well described by the Debye and Einsteincombined model. The fitting results show Debye and Einstein temperatures are 1119 and 199 K, respectively.

Synthesis of rod-like metal-organic framework(MOF-5)nanomaterial for efficient removal of U(Ⅵ):batch experiments and spectroscopy study

With the widespread application of radionuclide ^235U（VI）, it is inevitable that part of U（VI） is released into the natural environment. The potential toxicity and irreversibility impact on the natural environment has become one of the most forefront pollution problems in nuclear energy utilization. In this work, rod-like metal-organic framework （MOF-5） nanomaterial was synthesized by a solvothermal method and applied to efficiently adsorb U（VI） from aqueous solutions. The batch experimental results showed that the sorp- tion of U（Vl） on MOF-5 was strongly dependent on pH and independent of ionic strength, indicating that the dominant interaction mechanism was inner-sphere surface complexation and electrostatic interac- tion. The maximum sorption capacity of U（Vl） on MOF-5 was 237.0 mg]g at pH 5.0 and T = 298 K, and the sorption equilibrium reached within 5 rain. The thermodynamic parameters indicated that the removal of U（VI） on MOF-5 was a spontaneous and endothermic process. Additionally, the FT-IR and XPS analyses implied that the high sorption capacity of U（Vl） on MOF-5 was mainly attributed to the abundant oxygen-containing functional groups （i.e., C-O and C=O）. Such a facile preparation method and efficient removal performance highlighted the application of MOF-5 as a candidate for rapid and efficient radionuclide contamination＇s elimination in practical applications.

Facile synthesis of poly(aroxycarbonyltriazole)s with aggregation-induced emission characteristics by metal-free click polymerization

Regioseletive 1,3-dipolar polycycloadditions of 4,4'-isopropylidenediphenyl dipropiolate (1) and tetraphenylethene (TPE)-containing diazides (2) are carried out in polar solvents such as DMF/toluene at a moderate temperature of 100℃ for 6 h,producing poly(aroxycarbonyltriazole)s (PACTs) P3 with high molecular weights (Mw up to 23900) and regioregularities (F1,4 up to ～90%) in high yields (up to ～99%).These metal-free click polymerizations can propagate smoothly in an open atmosphere without protection from oxygen and moisture.The obtained polymers are soluble in common organic solvents and thermally stable at temperatures up to 375℃.Thanks to their contained TPE moieties,the PACTs show aggregation-induced emission and can serve as fluorescent chemosensors for superamplified detection of explosives.

Synthesis, two-photon absorption and AIE properties of multibranched thiophene-based triphenylamine derivatives with triazine core

Two new multibranched thiophene-based triarylamine derivatives with 1,3,5-triazine core are synthesized and characterized. Their one-and two-photon absorption properties and aggregation-induced emission effect have been investigated. Both the STAPA-based compounds are AIE active. The two-photon absorption (2PA) cross sections measured by the open aperture Z-scan technique are determined to be 620 and 1610 GM for STAPA-a and STAPA-b in chloroform,respectively, which dramatically increase with the introduction of alkyl chains. The relationship between their structures and properties on one-and two-photon absorption and aggregation-induced emission is discussed, which allows us to examine the effect of introducing alkyl chains. In addition, solvent effects also show a significant influence on the 2PA cross section. The two compounds with excellent AIE and 2PA properties provide attractive alternatives for the biophotonic materials.

Synthesis and characteristics of a novel artificial hapten using the copper mercaptide of penicillenic acid from penicillin G for immunoassay of heavy metal ions

In this paper, we describe the synthesis of a novel copper ion hapten using the copper mercaptide of penicillenic acid （CMPA） derived from penicillin. Results from tests with immune rabbits indicate that： （i） A new antigen synthesized with CMPA has good stability and is safe for immunizing animals with no toxic phenomena being found in animal experiments; （ii） the immunogenic antigen （CMPA-BSA） can stimulate the immune system to produce specific antibodies with high titrations, up to 150000; and （iii） antibodies in antisera showed higher affinity to OVA-GSH-CuC1 than OVA-GSH, which indicates that the antibodies have specific affinity towards copper ions. These results confirm that the novel hapten and relevant antigen for copper ion have been successfully synthesized, giving progress towards an immunoassay for copper ions in environmental and food samples.