Exact structure of positive solutions for some p-Laplacian equations

This paper establishes the exact multiplicities and properties of positive solutions for some second order differential equations involving p-Laplacian operator.     

An equivalence between two algorithms for quadratic programming

In this paper, we demonstrate that the Van de Panne—Whinston symmetric simplex method when applied to a certain implicit formulation of a quadratic program generates the same sequence of primal feasible vectors as does the Von Hohenbalken simplicial decomposition algorithm specialized to the same program. Such an equivalence of the two algorithms extends earlier results for a least-distance program due to Cottle—Djang.This research was prepared as part of the activities of the Management Sciences Research Group, Carnegie-Mellon University, under Contract N00014-75-C-0621 NR 047-048 with the Office of Naval Research.     

Domain structures of Nd13Fe80B7 magnets during HDDR process

The domain structures of Nd13Fe80B7 alloy at different stages of the HDDR process have been revealed using a magnetic force microscope. In the as-cast samples, the columnar crystals with easy axis perpendicular to one another are clearly characterized by their different domain structures. For the insufficient and sufficient HD treatment, an obvious change of domain structure occurs, which is related to the variation of composition and crystalline microstructure during the HD process. And for the samples after sufficient DR processing, it is confirmed that the configuration of the columnar crystals is retained by the detected domain structures.     

镁钛系载体催化剂乙丙共聚的ESR研究

本文用ESR研究MgCL₂-n-BuOH-i-Bu₃Al-TiCl₄/i-Bu₃Al催化剂乙丙共聚机理。ESR谱表明烷基化Ti³⁺活性中心有单空配位和双空配位两种状态,在乙烯或乙丙烯混和单体存在下ESR谱变化指出g=1.954和g=1.941的共振吸收峰和活性中心有关。结合共聚产物组成及竞聚率的¹³C-NMR谱分析,提出镁钛系载体催化剂活性中心上乙丙同时配位的机理。     

Physical Foundations of Formation of Bio-Self-Organization and the Bio-Photon Emission in the Living Systems

According to elementary processes of the biological activities in the living systems with open and non-equilibrium states, which can ever exchange the energy and material and information with the environments, we have established a statistical model formed bio-self-organization, which live on the basis of the negative entropy, by the quantum statistical-theory of non-equilibrium state. From this model we have obtained the peculiar curves of changes of the energy of molecules and found out the distribution function of bio-molecules on quantum energy-levels in the living systems which are completely different from that in inorganic matters. Utilizing the curves of energy obtained we explain well the phenomenon of bio-photon emission of the bio-self-organizations found in the experiments.     

Synthesis and Modification of Zn‐doped TiO2 Nanoparticles for the Photocatalytic Degradation of Tetracycline

The synthesis of Zn‐doped TiO₂ nanoparticles by solgel method was investigated in this study, as well as its modification by H₂O₂. The catalyst was characterized by transmission electron microscopy, X‐ray diffraction, Brunauer–Emmett–Teller, UV–visible reflectance spectra and X‐ray photoelectron spectroscopy (XPS). The results indicated that doping Zn into TiO₂ nanoparticles could inhibit the transformation from anatase phase to rutile phase. Zn existed as the second valence oxidation state in the Zn‐doped TiO₂. Zn‐doped TiO₂ that was synthesized by 5% Zn doping at 450°C exhibited the best photocatalytic activity. Then, the H₂O₂ modification further enhanced the photocatalytic activity. Zn doping and H₂O₂ modifying narrowed the band gap and efficiently increased the optical absorption in visible region. The optimal degradation rate of tetracycline by Zn‐doped TiO₂ and H₂O₂ modified Zn‐doped TiO₂ was 85.27% and 88.14%. Peroxide groups were detected in XPS analysis of H₂O₂ modified Zn‐doped TiO₂, favoring the adsorption of visible light. Furthermore, Zn‐doped TiO₂ modified by H₂O₂ had relatively good reusability, exhibiting a potential practical application for tetracycline's photocatalytic degradation.     

Pd/TiN nanocomposite catalysts for selective hydrogenation of phenol and its derivatives

Pd/TiN nanocomposite catalysts were fabricated for one-step selective hydrogenation of phenol to cyclohexanone successfully. High conversion of phenol (99%) and selectivity of cyclohexanone (98%) were obtained at 30℃ and 0.2 MPa H₂ for 12 h in the mixed solvents of H₂O and CH₂Cl₂. The Pd nanoparticles were stable in the reaction, and no aggregation was detected after four successive runs. The catalytic activity and selectivity depended on slightly the Pd particle sizes. The generality of the catalysts for this reaction was demonstrated by the selective hydrogenation of phenol derivatives, which showed that the catalyst was selective for the formation of cyclohexanone.     

基于IP PBX技术的话务系统设计与实现

摘 要: 针对IP PBX的操作复杂问题,提出了一种简化IP PBX电话系统的设计方案。设计了便捷实现IP PBX的用户指定操作的话务系统。新系统采用了自定义协商接口,通过Telnet通信协议和IP PBX进行通信。并实现了对各类接收数据进行高效处理和解析。完成各类短长途话务接转控制。实现客房入住统计和话务免打扰等服务。此话务系统可应用于宾馆、宾馆等场所,提高工作效率和服务水平。此系统目前已在宾馆中应用,运行状况稳定,使用效果良好。简化了人工操作流程和复杂度,节约了业务时间,提高工作实效。