Removal of pharmaceutical and personal care products (PPCPs) pollutants from water by novel TiO2–Coconut Shell Powder (TCNSP) composite

Photocatlytic removal of three pharmaceutical and personal care products pollutants using novel TiO₂–Coconut Shell Powder (TCNSP) composite was investigated. The photocatalytic degradation rate of PPCPs generally increased with increasing light intensity and dissolved oxygen concentration. The degradation rate decreased with increasing initial concentration of PPCPs. The PPCPs concentration decreased substantially under irradiation of UVC when used in conjunction with the TCNSP composite. A number of composite/radiation types and intensities were tested. The concentration rate decrease trend was as: UVC/TCNSP > UVA/TCNSP > UVC > UVA. Under the UVC/TCNP combination, 99% removal was achieved compared to 30% for TiO₂.     

Solidification Behavior of Immiscible Alloys under the Effect of a Direct Current

Directional solidification experiments were carried out with Al-Pb alloys under the effect of a direct current （DC）. The experimental results show that the DC causes a migration of the minority phase droplets （MPDs） from the middle part to the surface region of the sample, Samples with either a finely dispersed microstructure or a shell/ core structure were obtained by solidifying the alloy under the effect of the properly selected DC densities, A model was developed to describe the microstructure evolution in an immiscible alloy directionaliy solidified under the effect of the DC. The microstructure formation in the AI-Pb alloys was calculated. The numerical results are in favorable agreement with the experimental ones. They demonstrate that the DC affects the microstructure formation mainly through changing the spatial motions of the MPDs and the temperature field of the melt in front of the solid/liquid interface. The formation mechanisms of the finely dispersed microstructure as well as the shell/core structure were sufficiently clarified.     

PP71喷油器壳体合件的焊接工艺研究

介绍了P型喷油器的工作原理以及喷油器壳体的结构及作用,针对PP71喷油器壳体的结构,从焊接原理及试验结果方面,分析了摩擦焊接、火焰焊接、感应钎焊3种焊接工艺的特点,重点介绍了PP71喷油器壳体采用感应加热钎焊的工艺方法及应注意的事项。     

浅谈SQLite数据库技术在Android平台的应用

在当今的数字世界中,手机的应用范围越来越广。在手机这种特殊设备里,经常会存取一些数据,例如:音频文件、视频文件、图片文件和通讯录等数据。Android作为一种手机操作系统,提供如下几种存取数据的方式:Preference(配置)、File(文件)、SQLite数据库和网络等。本文将着重阐述SQLite数据库技术在Android平台的应用。     

The effect of geometric imperfections on the vibrations of anisotropic cylindrical shells

Analytical–numerical models to analyse the flexural vibration behaviour of anisotropic cylindrical shells are presented. The two models (denoted as Level-1 and Level-2 Analysis) have different levels of complexity and can be used to study the influence of important parameters, such as geometric imperfections, static loading, and boundary conditions. A specific anisotropic shell is used in the calculations in this paper. The influence of the imperfection shape and amplitude on the natural frequency is investigated for this shell via both the Level-1 and the Level-2 Analysis. Imperfections with the shape of the “lowest vibration mode” give a decrease of the natural frequency with increasing imperfection amplitude. The results of the Level-2 Analysis for the effect of imperfections on the natural frequency are in reasonable agreement with Finite Element calculations.     

Developing a generic FMS for small to medium size industries of Korea

This article reports on the development of a generic FMS that is suitable for small to medium size industries. It introduces FMS construction tool named “shell”, system building methodology using it. Also, it outlines the overview of the developed FMS(KUFMS) and its computer control system. Furthermore, it elaborates on the intercommunication device that links the machinery to its control computer. The factors considered in the development of KUFMS are low implementation cost, easy implementation, case of expandability, simple modification capability.     

高铝粉—匣钵砂水玻璃型壳高温变形温度回归方程研究

本文通过试验和数据处理建立了水玻璃—匣钵砂型壳高温变形的回归方程式并进行了详细的分析,结果表明:高温变形与配料有关;水玻璃密度和粉液比愈高则高温变形温度愈高,低的高铝粉加入量不仅能获得高的高温变形温度,而且型壳的湿强度和900℃焙烧后的型壳强度也提高,此外其残留强度也较小。     

Proposal for design rules of axially loaded steel cylinders on local supports

This paper presents the final results of a European research project aimed at the enhancement of ECCS design recommendations for axially loaded cylindrical steel shells on local column supports. The parameters investigated cover the range occurring in practical silo design. The shell slenderness R/t was varied between 200 and 750 and dimensionless support widths of up to 10% of the supported circumference related to the total circumference were considered (four columns). The strengthening effect of commonly used higher steel grades was also studied (Fe 360 to Fe 510). The basic case of investigation was the unstiffened cylinder with constant wall thickness resting on flexible supports. In a second experiment the strengthening effect of increased wall thickness of the bottom course was investigated. The project consisted of a testing part, carried out at the Laboratory for Model Testing at the University of Gent and a numerical–theoretical part carried out at the Technical University Graz. The numerical results were cast into compact and understandable design formulae which permit direct comparison with the design carrying capacity of the uniformly loaded cylinder. The test results served for the validation of the numerical procedure and the check of the developed design formulae.     

60万千瓦电站强制循环压力泵泵壳焊接工艺及制造

本文详细介绍了60万千瓦电站强制循环压力泵泵壳的焊接制造工艺,重点叙述了产品模拟件的焊前准备、装配、预热、焊接、焊后热处理、探伤情况等内容,同时对生产工艺准备也作了详细介绍。     

新抗冲型ACR的合成与研究

采用种子乳液聚合法制备了含有PBA／PMMA＼PS三种组分的丙烯酸醋类抗冲型改性剂ACR，在ACR的幔层结构中引入接枝剂甲基丙烯酸烯丙酯（AIMA）来完善幔层结构，从而实现核一壳之间良好的结合，用红外光谱（FTIR）和差示扫描量热法（DSC）对ACR的组成和结构进行表征。研究结果表明：由PBA＼PMMA＼PS三组分构成的ACR在抗冲击性能上要略优于由简单的PBA＼PMMA构成的ACR，苯乙烯单体（St）最多可以取代大约1／3壳层的甲基丙烯酸甲酯（MMA），甲基丙烯酸烯丙酯（AIMA）的引入对幔层结构的完善起了显著的作用。