WEB页面分析技术和Mashup技术在图书馆OPAC中的应用

OPAC使图书馆读者可以万维网实现对本地图书资源的查找和借阅。但是单纯依靠本地数据信息只能提供图书内容、典藏信息、借阅状态等信息,并不能及时提供诸如书评、图书封面等相关及时信息。利用WEB页面分析技术和Mashup技术可以将互联网相关信息整合到OPAC中,使读者可以客观形象地得到更全面的信息。     

智能手机WEB应用在通信运营商网络维护中的作用

通过构造WEB服务器,利用智能手机WEB页面,浏览通信运营商网络内PSTN交换机、动环监控系统、各种网络交换机及路由器实时告警,用手机WEB页面开通FTTH业务,随时随地进行网络交换机的维护操作。     

基于网络的炼油装置腐蚀案例库的设计与开发

通过对腐蚀案例特征的分析,设计规范化的案例结构,并对案例库的功能系统进行分析与设计,建立基于网络的、可扩充的炼油装置腐蚀案例库.实现了从设备信息、关键词及工艺原则流程图等多层次、多角度对腐蚀案例的查询.     

煤制气装置腐蚀案例剖析

针对水煤浆气化装置的气化、净化单元自投产以来出现的严重设备腐蚀问题,以渣水泵腐蚀案例、气化单元静设备腐蚀案例、气化单元管线腐蚀案例、净化冷凝液汽提系统腐蚀案例、甲醇/水分馏塔系统腐蚀案例、低温设备和管线腐蚀案例进行原因分析,提出防腐措施。防腐蚀工程作为一项系统工程,应当贯穿在设备设计、制造、运行管理、维护、故障诊断以及维修的全过程中。     

“案例教学法”在腐蚀类课程中的构建和实施

腐蚀是一门理论与实践联系非常紧密的学科,腐蚀现象在日常生活和企业生产中普遍存在。本文从腐蚀类课程教学中存在的不足出发,提出了在腐蚀类课程中实施"案例教学法"的可行性,指出了腐蚀案例的收集原则、收集形式和收集途径,探讨了案例在教学过程中应如何具体应用。实践表明,案例教学法的实施不仅极大地提高了学生的学习热情、学习兴趣和课堂参与度,也促使教师不断改进教学方式,积极参与科研、企业实践等活动。学生的创新能力和教师的教学能力都得到了提高。     

Web数据管理在石油化工信息系统中的研究与应用

本文对WEB类的数据管理系统和数据存储空间的描述,在WEB数据管理中,XML的多种使用方式探讨。在目前计算机技术水平日新月异的发展下,Web信息会以更接近数据管理模式的数据库管理,数据管理的领域将有更长远的发展前景。     

WEB数据挖掘技术在高校图书馆工作中的应用

WEB数据挖掘技术是一种新兴的信息处理技术，在信息的利用和提取中发挥着非常重要的作用。本文在论述WEB数据挖掘技术的基础上，探讨了数据挖掘在高校图书馆工作中的应用。     

40万吨/年尾油加氢装置的腐蚀现状分析

在高温下的氢和硫化氢以及在低温下的硫化氢、硫化铵和氯化铵是造成尾油加氢装置腐蚀的主要原因。通过分析40万吨/年尾油加氢装置相关介质数据,得出尾油加氢装置高温下的氢腐蚀、硫化氢腐蚀和铵盐冲刷腐蚀的机理,并提出预防措施。     

联合站储油罐防腐

随着经济的发展，对能源的利用也越来越多，在原油的储存与运输过程中涉及到的问题不断被关注。联合站储油罐由于内部的特有特点与外部的环境因素变化，存在着不同程度的腐蚀，本文结合实践案例对储油罐的腐蚀状况与原因进行分析，并就相关的防护措施进行讨论，将具体的科学措施固化成制度，实现可持续发展。     

储气井损伤模式

在承压设备损伤模式相关的国内外技术标准的指导下,根据储气井的材料、栽荷、介质及使用环境等具体特性,结合对储气井部分失效案例以及对其使用中存在问题的调查统计,并借鉴承压设备及油气井相关的研究成果,对储气井的损伤模式作了初步归纳,共归纳出了10种损伤模式,分别是土壤腐蚀、地层流体腐蚀、电化学腐蚀、水泥层下腐蚀、大气腐蚀、湿硫化氢腐蚀、脆性断裂、疲劳、螺纹连接接头泄漏、腐蚀疲劳,对每种损伤模式的现象、形态、影响因素、预防措施、检测方法等也作了分析。     

燃气管道阴极保护在线数据监测管理系统探讨

针对燃气管道常规阴极保护方法的不足,介绍一种燃气输配管线在线阴极保护系统。整个系统主要包括现场测量设备及数据采集单元、数据通信和传输单元、数据处理单元、WEB发布单元等四个模块单元。该系统在欧洲得到较好的发展,能够有效监控燃气管道阴极保护情况。     

油井井下管柱腐蚀监测技术在中原油田卫79块的研究与应用

本文介绍了油井井下管柱腐蚀状况监测技术,技术原理是运用723分光光度计测定油井产出水中的铁离子含量,同时提供了腐蚀判断标准,它能很好地指导油井投加油井缓蚀剂治理腐蚀。本文介绍了该技术在卫79块的典型应用实例。结果表明该技术能节约50%缓蚀剂。     

Active coating

Preventing the corrosion of metal substrates by applying an active coating was studied. The active coating was prepared by addition of metal powder and polyaniline in xylene solution. Trials were conducted by coating a blast-cleaned, mild steel round bar with a brush. The coating was dried in the air and the steel samples were immersed in water collected from the open sea. Open circuit potential of steel was measured with silver/silver chloride reference electrode. The potential in seawater was in the range of — 740mV to — 956mV, indicating complete protection of steel against corrosion. This potential meets the criteria for protection as per clause 5.4.1 of Det Norsk Veritas Recommended Practice RPB 401 (1993), page 8.¹ The active coating system can be used for protecting the steel against corrosion in marine and any other highly corrosive environment. Accelerated tests in accordance with ASTM D5894 — 96² with freeze cycle developed by U.S. Federal Highway Administration are planned.     

某油田油水混输管道用缓蚀剂的筛选与评价

设计了一套系统的油水混输管道用缓蚀剂的筛选与评价方法。以涠洲某油水混输海管为案例,利用该缓蚀剂筛选评价方法,针对该管道生产工艺特点,进行了系统的缓蚀剂筛选评价。根据该筛选方案,首先进行现场工况数据的收集与分析,再对8种缓蚀剂进行了初步筛选,包括理化性能测试(溶解性、乳化倾向、发泡性和与其他药剂配伍性等)与电化学测试。在上述筛选基础上,选取最苛刻的腐蚀工况点,并考虑缓蚀剂加注浓度的变化,在50 mg/L与40 mg/L的加注浓度下进行动态模拟试验评价缓蚀剂的缓蚀性能。最后结合缓蚀效果及经济性两方面,筛选出了满足要求的缓蚀剂及对应的加注浓度。结果表明该缓蚀剂筛选评价方案在实际工程应用上切实可行。     

Antioxidant activity of burdock (Arctium lappa Linné): Its scavenging effect on free-radical and active oxygen

The antioxidant activity and free-radical and active oxygen-scavenging activity of burdock extracts were investigated. Of the solvents used for extraction, water yielded the greatest amount of extract that exhibited the strongest antioxidant activity. Water extracts of burdock (WEB) and hot water extracts of burdock (HWEB) exhibited comparable and marked activity on inhibition of linoleic acid peroxidation, indicating that heat treatment did not alter the antioxidant activity of WEB. WEB and HWEB produced significantly lower (P<0.05) malondialdehyde (MDA) in both linoleic acid and liposome model systems than did the control. Moreover, mixtures of tocopherol (Toc), WEB, and HWEB exhibited a remarkable synergistic antioxidant effect in a liposome system; WEB and HWEB thus potentiated the action of Toc. Furthermore, WEB and HWEB displayed a marked inhibitory effect on lipid peroxidation of rat liver homogenate in vitro. WEB and HWEB exhibited an 80% scavenging effect on α,α-diphenyl-β-picrylhydrazyl radical and marked reducing power, indicating that WEB and HWEB act as primary antioxidants. Both extracts at a dose of 1.0 mg exhibited a 60.4–65.0% scavenging effect on superoxide and an 80.5% scavenging effect on hydrogen peroxide. They also showed a marked scavenging effect on the hydroxyl radical. These results revealed that WEB and HWEB are also active as oxygen scavengers and as secondary antioxidants. Based on these results, termination of free-radical reactions and quenching of reactive oxygen species in burdock extracts are suggested to be, in part, responsible for the antioxidant activity of burdock extracts.     

高温高压临氢换热器硫化氢腐蚀原因与修复

分析了高温高压临氢换热器硫化氢腐蚀原因,介绍了腐蚀表面现场修复方法,包括腐蚀表面加工、预热、施焊操作与安全防护、焊后热处理及检验等关键工艺。采用ER309LSi不锈钢作为堆焊层,通过合理的焊接工艺,可以减缓温高氢-硫化氢环境下的腐蚀。     

Challenges of chromate inhibitor pigments replacement in organic coatings

General considerations concerning pigment grade corrosion inhibitors are presented and new characteristic functional parameters proposed. The chemistry, contemporarily practiced for corrosion inhibitor pigment synthesis, as well as known mechanistic considerations relevant to the corrosion inhibitor species available in pigment grades, are reviewed. Inherent limits of chemistry are outlined regarding the feasibility of developing equally effective and versatile non-toxic alternatives for chromates.

Fundamental aspects of corrosion inhibitor pigment behavior are discussed in the context of organic coatings degradation mechanisms. Disclosed experimental data demonstrate that correlation exists between solubility of corrosion inhibitor pigments, leaching from, and osmotic blistering of organic coatings. A mathematical expression is proposed and empirically proven to adequately describe the leaching rate of corrosion inhibitor pigments from organic coatings.

The barrier function of some high performance organic coatings, such as aircraft or coil, is negligible and requires the contribution of an effective corrosion inhibitor pigment, which, typically, is strontium chromate. In this context, the feasibility of replacing chromate inhibitor pigments is assessed and the “gap” observable between the inhibitor performance of chromates and traditional non-chromate pigments is noted.

Experimental data are displayed regarding the corrosion inhibitor performance of a novel, organic–inorganic, hybrid type corrosion inhibitor pigment in typical aircraft primer application on aluminum and plated steel. The presented data demonstrate the feasibility of chromate replacement in this specific case.     

Effects of non-uniform corrosion on the cracking and service life of reinforced concrete structures

The purpose of this study is to explore the effects of non-uniform corrosion on cracking behavior of concrete cover. The effects of non-uniform corrosion distribution, cover-to-rebar diameter ratio, and concrete compressive strength on the cracking pressure of concrete cover were studied. The present study indicates that the pressures to cause cracking of concrete cover under non-uniform corrosion conditions are much smaller than those under uniform corrosion case. The cracking pressure decreases up to about 60% depending upon the types of non-uniform corrosion distributions. It was also shown that cover-to-rebar diameter ratio and concrete compressive strength affect greatly the cracking pressure of concrete cover. Realistic equations on the cracking pressure of concrete cover were derived. The comparisons of analysis results with the test data on the cracking pressure of concrete cover show fairly good agreement. Finally, the effect of non-uniform corrosion on the service life of concrete structures was discussed.     

硫酸盐还原菌诱导腐蚀的电化学噪声分析

基于电化学噪声(EN)和信号处理研究硫酸盐还原菌(SRB)对304不锈钢诱导的腐蚀。将304不锈钢电极分别置于硫酸盐还原菌接种前后的培养基中,利用电化学工作站分别对2种试样的腐蚀进程进行电化学噪声测量,将测得的噪声数据去除直流漂移,再对这些数据进行时域、频域和小波分析。结果表明:通过时域分析得到的标准偏差和噪声电阻可表征腐蚀速率,局部因子则可以区分腐蚀类型。通过频域分析得到的功率谱密度曲线,能表征304不锈钢腐蚀的程度。小波分析则能从不同尺度下分解信号,更加直观、清晰地表征腐蚀进程。利用电化学噪声技术能很好地监测SRB对不锈钢的腐蚀影响,根据不同的需求采用不同的分析方法进行电化学噪声数据分析,才能准确表征腐蚀类型、腐蚀速率以及腐蚀程度。