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马永忠 《中国新技术新产品精选》2014,(23):172-172
安全是生产的第一要素,只有保证生产的安全运行,才能够取得良好的经济效益,尤其是对于化工企业来讲。化工生产是我国工业生产中的重要组成部分,在我国的经济发展中起到了推动作用。由于化工生产工艺比较繁琐,在生产的过程中具有较高的危险性,生产物质具有易燃、易爆、易腐蚀等各种特性,会对人的健康和周围的环境造成严重的影响,所以要注意化工生产的安全性。文章对于化工安全生产中存在的问题进行了分析,然后提出了解决的对策,对于提高化工生产的安全性具有重要的意义。 相似文献
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在化工生产中,对工艺的连续性、腐蚀性等操作条件的要求非常苛刻,在具体的操作过程中也存在一定的危险性,自动化控制便应运而生,为安全生产提供一定的保证。本文主要对化工安全生产中存在的一些问题进行探讨,对自动化控制在化工安全生产中的应用进行深入的分析和研究。 相似文献
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刘思佚 《中国新技术新产品精选》2013,(7):161-161
化工工厂电能的质量直接关系到整个化工工厂生产的安全和效率,化工工厂由于电能质量的问题常常导致化工工厂生产过程中造成一系列事故的现象,不仅给化工工厂的生产和安全带来了很大的影响,极大的威胁到了人民的生命财产安全,而且给我国的经济发展造成了巨大经济损失,阻碍了社会的发展。本文就化工工厂电能质量的问题和现状进行分析和探讨,并为提高化工工厂电能的质量提出一些可供参考的意见和措施,并制定一个化工工厂电能质量优化方案。 相似文献
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杨阳 《中国新技术新产品精选》2012,(15):124-124
化工行业的发展方向是向着大型化,智能化方向进行,在生产不断的进行中,安全问题成为了人们经常谈论的话题,在化工生产中安全仪的使用,无疑是给安全带来了极大的保障,这也是化工厂安全生产的一项重要的措施。在本文中作者将结合自己的自身经验,对化工行业安全仪表的使用进行分析和探讨,给相关化工行业的员工们做参考使用。 相似文献
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生产装置的自动化以及大型化是现代工业发展的重要特点。自动化的发展趋势能够提高工业生产中的稳定性与安全性,同时对提高生产效率以及生产质量具有重要的意义。但是在化工产业的自动化水平不断提高的同时,化工仪表作为自动生产控制系统中重要的组成部分,其腐蚀问题日益突出,并且对化工企业的经济利益造成了直接或者间接的损失,所以化工仪表的腐蚀问题是当前化工生产中必须重视的问题之一。本文对化工仪表的防腐蚀问题进行了阐述,同时提出了几种常用的化工仪表防腐方法。 相似文献
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在化工企业中,化工仪表系统在化工企业安全生产过程中发挥着重要的引导作用,而化工仪表系统故障不仅会影响化工企业的正常生产,甚至可能引发生产事故,所以对化工仪表故障进行分析具有重要的现实意义。本文对化工仪表系统中存在的主要故障进行了分析,在阐述化工仪表故障判断思路的基础上对预防和处理化工仪表故障中的问题进行了探讨。 相似文献
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Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness. 相似文献
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Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly. 相似文献
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理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。 相似文献
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As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death. 相似文献
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Miao Maosheng 《华南师范大学学报(自然科学版)》2014,(6)
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula- 相似文献
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Yang Weitao 《华南师范大学学报(自然科学版)》2014,46(6):137-138
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re- 相似文献
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Bernard Kirtman 《华南师范大学学报(自然科学版)》2014,(6)
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that 相似文献
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《上海师范大学学报(自然科学版)》2014,(5):550
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with 相似文献
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《吉林大学学报(理学版)》2014,(5):1105
<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has 相似文献