蒸发型结晶器提高结晶率的探讨

本文介绍了现代化工生产的常用结晶器类型,以蒸发型结晶器为例,论述了蒸发型结晶器的生产原理;指出了利用蒸发型结晶器生产赖氨酸盐酸盐操作过程中的细节控制,以及为保证结晶率而采取的目的和措施。     

结晶器振动装置故障原因分析

结晶器振动装置主要是利用计算机数据采集分析的系统,可以更好地观察连铸过程,改善连铸性能。本文主要是分析了结晶器连铸机结晶器振动装置发生的故障原因,并给出了合理的解决。     

小方坯结晶器铜管的设计与制造

<正>在连铸生产中结晶器是一个极其关键的部件,有人说它是连铸的"心脏",也有人说它是连铸机的"机头",可见它的重要性不言而喻了。的确,结晶器是连铸过程中的一个高效率的热量交换器,也是钢水在凝固过程中的模子,是它把钢水的热量通过流水带走,在结晶器内部形成坯壳,它还能净化钢水中的夹杂物。因此连铸结晶器在连铸过程中有无法替代的作用,是最为核心的部件。结晶器的质量决定着连铸的拉坯速度、钢坯的质量,在结晶器这个"核心"部件中有一个更为"核心"的零件,那就     

玉米发酵液中食用乳酸钙结晶的研究

以玉米发酵液为原料,研究了不同的结晶器温度和不同的发酵液在结晶器内的停留时间对乳酸钙结晶颗粒粒径和产率的影响。通过实验得出:发酵液在某一温度下乳酸钙结晶时,当最大颗粒粒径较大时,出现最小颗粒粒径较小的现象;当最大颗粒粒径较小时,会出现最小颗粒粒径较大的现象。停留时间和结晶器温度对颗粒的粒径分布范围及体积分数产生影响。同时,结果表明随着结晶器温度的升高,乳酸钙收率降低;随着发酵液在结晶器内停留时间的增加,乳酸钙收率升高。     

高效连铸结晶器冶金过程控制关键技术研究

随着经济的发展,科学技术的进步,高效连铸技术也得到了很好的发展,高效连铸技术尤其在结晶器冶金过程中得到了很到了应用.高效连铸结晶器冶金过程控制关键技术是业内人士重点研究的课题.文章简分析了高效连铸结晶器冶金过程控制关键技术.     

高效连铸结晶器冶金过程控制关键技术研究

随着经济的发展,科学技术的进步,高效连铸技术也得到了很好的发展,高效连铸技术尤其在结晶器冶金过程中得到了很到了应用。高效连铸结晶器冶金过程控制关键技术是业内人士重点研究的课题。文章简要分析了高效连铸结晶器冶金过程控制关键技术。     

浅谈结晶器液压调宽技术

随着连铸技术的进步,结晶器在线调宽技术被广泛应用。南钢中厚板卷厂三台连铸机都装备了结晶器在线调宽技术,减少了生产准备时间,提高连铸机作业率和产能。结晶器液压在线调宽具有结构简单,控制精度高,运行稳定,是目前主要的调宽方式。     

浅谈组合坯结晶器设计原理及关键部件的设计与制造

本文对组合坯结晶器在冶金连铸技术中的重要作用进行了分析,对组合坯结晶器的设计原理做了介绍,并针对组合坯结晶器的特点,重点介绍窄面连接水管的设计改进与弧形窄面铜板的设计与加工工艺改进。     

结晶器振动在线状态监测分析系统的研制

结晶器振动决定了连铸机生产产品的质量和产量,加强对结晶器振动在线状态监测分析对于连铸机的使用具有重要的实用价值。     

宽厚板坯结晶器跑锥原理分析与优化

系统分析了宽厚板坯结晶器跑锥的主要原因，通过对调宽装置的优化设计，对调宽方式的改进，有效控制了结晶器跑锥现象。     

编组站调度信息对阶段计划的影响及计划调整研究

考虑编组站列车到达时间的不确定性，研究阶段计划解体方案的鲁棒调整方法，以提高阶段计划的鲁棒性。在研究编组站列车到达规律及其对阶段计划编制和执行的影响的基础上，分析通过调整解体方案提高阶段计划鲁棒性的必要性和可行性；由列车解体最早开始时刻、解体最晚开始时刻以及待解时间之问的关系，推导出相邻列车解体顺序调整的判定条件；定义了列车待解时间调整量的概念，给出不同情形下列车待解时间的最大调整量的计算方法；基于解体方案鲁棒调整的概念，提出基于随机模拟和经验公式两种解体方案鲁棒调整评价方法；最后给出解体方案鲁棒调整算法。     

The clash of managerial and professional logics in public procurement: Implications for innovation in the health-care sector

This article addresses the enactment of public procurement and its influence on adoption and diffusion of innovation, using a case study of public procurement of a low-tech medical device innovation in Swedish healthcare. Based on interviews and documentation, the article illustrates the various perspectives of the different professions involved in the complex task of setting the requirement specification for the tender. The technology identities of the medical device (innovation) are constructed and negotiated by the actors: procurement administrators, health-care professionals and suppliers within the adoption space. Examining the enactment of the procurement process as part of the adoption space is a way to deepen our understanding of the social component within public procurement.     

钻孔桩基础施工质量控制

文章介绍了巨龙大道跨线桥使用冲击钻机进行桩基础施工的全过程和保证灌注桩质量的控制技术:必须抓好围堰筑岛和桩位控制、护筒埋设,选择合适的钻机和泥浆比重、流量,抓好清孔和灌注水下混凝土质量,对成桩质量进行了检测。对钻孔桩的清孔标准、地质情况的判断、泥浆的净化等问题提出了见解。     

The bones of the body politic: thoughts on the Savorgnan de Brazza Mausoleum

This essay examines three examples of political treatment of the dead (specifically their bones) in the Republic of the Congo: the return of the remains of its capital's founder, Savorgnan de Brazza; the disappearance of the body of André Matswa, hailed by the people as their messianic ‘saviour’ guardian; and finally, the treatment of unidentified victims of the various armed conflicts that occurred during the years 1990–2002. These events can be analysed through the prism of two different historical perspectives: in terms of the moyenne durée, the treatment of Matswa's bones paved the way for the subsequent occurrences by creating a precedent; in the context of the ‘present of history’, the construction of a Brazza mausoleum is contemporaneous with official denial of the presence of human remains scattered across the capital city of Brazzaville as a result of armed conflicts. The comparative analysis of these historical configurations posits a set of circumstances whereby the bones become a symbolic buttress of the capital. The historical puzzle here is to understand how that which came together in claiming Matswa's bones becomes, in the context of democratization of the regime, an aesthetic sense of the ‘beauty of death’ as expressed by people when they see the shrine as their country's finest architectural accomplishment. Through the splendour of the monument, this aesthetic sense articulates the denial of the presence of the nameless dead.     

基于熵技术的农村公路施工质量综合评价

鉴于农村公路施工质量评价所存在的模糊性和随机性的特点,在建立涵盖整个施工质量影响因素为一级指标的施工质量综合评价指标体系的基础上,运用模糊数学理论,建立了二级模糊综合评价模型,借用熵的概念计算客观权重的方法,提出了施工质量模糊综合评价的方法。应用该方法对某农村公路项目质量进行评价,得出其评价结果为"良好"。最后,对该方法进行了定量解算,从而提高了施工质量评价的客观性和科学性,通过对结果的深入分析,可找出施工过程中存在的不足之处,从而为目标明确、有的放矢的改进施工质量提供理论依据,具有一定的实用价值。     

公民意识的法理解读——基于法治发展的主体要素考量

文章用人文主义的文化分析方法,指出了公民意识是特定法实践结构基础上产生的法律意识及其对法治发展的能动关系,并在与法律意识、法律权威、法律信仰、道德等相关概念的辨析中明确了其作为国家观念、法律传统、文化的不同层次属性。由此,从发展的角度看,法治系统又是一个包括制度要素和主体要素的运动系统。     

中世纪的骑士精神及其衰落

在学习西欧中世纪骑士制度过程中,了解到了骑士制度在中世纪历史上所占据的历史地位。骑士制度被誉为"封建制度之花",是社会中坚力量,骑士精神对国王到最低等贵族的统治阶级产生了巨大影响。庄园经济的衰落使骑士制度逐步瓦解;战争的平民化和雇佣军的盛行使骑士队伍萎缩;基督教的腐朽弱化了"骑士精神";不适应军事和战争变革的需要,几个方面解释在政治和社会上拥有如此高地位的骑士阶层从繁荣到衰落的原因。     

Swedish tribalism and Tanzanian entrepreneurship: preconditions for trust formation

The aim of this paper is to explore the relationship between entrepreneurship and the structure of the periphery. The objective is to reach an understanding of the entrepreneurial process within the context of the periphery, which is traditionally seen as a poor environment. The paper considers the concept of peripherality and identifies a process of gravitation that drains higher order services towards the core. However, this deterministic model does not correspond with the realities of the Scottish Highlands. The paradox is that new businesses are being created that appear to use old redundant peripheral values such as tradition. It is argued that it is the social construction of the periphery that produces this post-modern change. The qualitative methodology indicates the emergence of a new spatial paradigm of aesthetic consumption. Two indicative case studies are presented which show that entrepreneurship is the creation and extraction of value from the environment. Their businesses are the commodification of non-material and aesthetic values. Further analysis of these data demonstrates that entrepreneurs interpret their own version of the environment, rather than merely reacting to it. In turn, they enact this interpretation which forms the basis of their businesses.     

国内门户网站品牌塑造及模型构建——基于国内外门户网站的比较研究

互联网是全球化的虚拟化,虚拟体验直接影响顾客的认知与行为,从而影响网站的品牌。基于受众体验的国内门户网站品牌塑造模型的构建,是国内门户网站在参考国外先进的网站建设的成功经验的基础上,塑造适合国内门户网站的品牌策略和一项重要的竞争策略。