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本文根据作者对国内外各种水上乐园水处理设施的考察,结合上海热带海宫工程水处理设计,对水上乐园水处理的工艺过程,主要设备的选择作了概要的介绍及比较。对今后制定水上乐园水处理设计方面的技术规定或规程提供了参考。 相似文献
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阐述了武钢热轧浊循环水在热轧板、线材生产中的作用及水处理面临的困难.以高线浊环水为例描述了从水处理工艺的改进、水处理方法的完善、设备能力的增强对改善水质所起到的作用.改进后满足了生产需求.实现了系统水全循环目标,创造了经济效益和环保效益. 相似文献
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介绍了水处理作业区均衡补水项目的工作原理及实施。通过增加阀位反馈器等设备材料,改进PLC相关程序,以小成本的投资,实现对普通两位型电动蝶阀进行模拟控制,达到均衡补水的目的。 相似文献
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钢铁企业循环冷却水在炼铁、炼钢连铸、轧钢等主体生产中起着至关重要的作用,通过对循环冷却水处理技术的现状分析,研究了化学药剂处理、静电水处理、磁化处理、膜处理及臭氧处理等技术,进一步研究了循环冷却水处理技术的发展趋势。这对钢铁企业循环冷却水的处理具有一定的借鉴意义。 相似文献
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张勇 《有色冶金设计与研究》2006,27(4):59-62
随着科学技术的不断发展,新技术、新设备、新材料层出不穷,供水技术在其各方面都取得了长足的进步。本文主要介绍国内外给水处理技术的现状及发展趋势。 相似文献
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从湘钢高线摩根轧机水处理配套的600LA-23型立式轴流泵时轮磨损故障的典型剖析,论述了叶轮离心力和橡胶轴承磨损量分别对泵运行的影响关系,并依据现场实际,改进橡胶轴承水润滑的设计参数,有效减少磨损,确保设备的长周期正常运转。 相似文献
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甘宜超 《冶金设备管理与维修》1999,17(2):26-28
从湘钢南线摩根轧机水处理配套的600LA-23型立式轴流泵叶轮磨损及振动故障的典型剖折,论述了叶轮离心力和橡胶轴承磨损量分别对泵运行的影响关系,从而依据现场实际,改进橡胶轴承水润滑的设计参数,有效减少磨损,确保设备的长周期正常运转。 相似文献
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众所周知,当不稳定量子系统被频繁测量时,量子Zeno效应就会发生,此效应在量子信息和量子通信中具有重要意义.然而,以前人们所研究的量子Zeno效应多数是针对二能级系统.可以验证三能级系统里同样存在量子Zeno效应,这将对不同量子系统量子态跃迁的阻止和量子Zeno效应的理解带来帮助,同时,在此基础上拓展到高维系统,也证明此效应的存在. 相似文献
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The statistical analysis of mediation effects has become an indispensable tool for helping scientists investigate processes thought to be causal. Yet, in spite of many recent advances in the estimation and testing of mediation effects, little attention has been given to methods for communicating effect size and the practical importance of those effect sizes. Our goals in this article are to (a) outline some general desiderata for effect size measures, (b) describe current methods of expressing effect size and practical importance for mediation, (c) use the desiderata to evaluate these methods, and (d) develop new methods to communicate effect size in the context of mediation analysis. The first new effect size index we describe is a residual-based index that quantifies the amount of variance explained in both the mediator and the outcome. The second new effect size index quantifies the indirect effect as the proportion of the maximum possible indirect effect that could have been obtained, given the scales of the variables involved. We supplement our discussion by offering easy-to-use R tools for the numerical and visual communication of effect size for mediation effects. (PsycINFO Database Record (c) 2011 APA, all rights reserved) 相似文献
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Increasing emphasis has been placed on the use of effect size reporting in the analysis of social science data. Nonetheless, the use of effect size reporting remains inconsistent, and interpretation of effect size estimates continues to be confused. Researchers are presented with numerous effect sizes estimate options, not all of which are appropriate for every research question. Clinicians also may have little guidance in the interpretation of effect sizes relevant for clinical practice. The current article provides a primer of effect size estimates for the social sciences. Common effect sizes estimates, their use, and interpretations are presented as a guide for researchers. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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As the largest energy consuming manufacturing sector and one of the most important sources of carbon dioxide (CO2) emissions, the China′s iron and steel industry has paid attention to the study of changing trend and influencing factors of CO2 emissions from energy use. The logarithmic mean Divisia index (LMDI) technique is used to decompose total change in CO2 emissions into four factors: emission factor effect, energy structure effect, energy consumption effect, and steel production effect. The results show that the steel production effect is the major factor which is responsible for the rise in CO2 emissions; whereas the energy consumption effect contributes most to the reduction in CO2 emissions. And the emission factor effect makes a weak negative contribution to the increase of CO2 emissions. To find out the detailed relationship between change in energy consumption or steel production and change in CO2 emissions, the correlation equations are also proposed. 相似文献
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The effect of microelectrophoretically and systemically applied opiates on neuronal discharge activity in the sensorimotor cortex of naive and morphine tolerant/dependent rats has been studied. In naive rats depression of spontaneous discharge activity was the predominant effect of low doses of phoretically applied morphine. Higher doses and repeated application frequently converted this effect into excitation. Only the depressant effect was antagonised by naloxone. Naloxone itself had no effect on spontaneous discharge activity when applied at dose-levels sufficient to antagonise the depressant effect of morphine. Levorphanol mimicked the action of morphine whereas dextrorphan was inactive. Morphine depressed the excitatory action of L-glutamate and of acetylcholine by a naloxone-antagonisable mechanism. Systemic application of Fentanyl mimicked the inhibitory effect of phoretically applied morphine upon transcallosally evoked discharge activity. The late response was markedly depressed whereas the primary response was little affected. Phoretically applied naloxone antagonised the effects of systemically applied Fentanyl. In chronically morphinised rats the depressant effect of microelectrophoretically administered morphine was almost lacking and a naloxone-resistant excitation became the predominant effect. In these animals the excitant effect of naloxone was also increased and the anti-glutamate effect and the anti-acetylcholine effect of morphine was abolished. The present data speak in favour of a postsynaptically located stereospecific receptor which mediates the inhibitory effects of opiates and which may be involved in the development of acute and chronic tolerance to these drugs. 相似文献
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As the largest energy consuming manufacturing sector and one of the most important sources of carbon dioxide (CO2) emissions, the China's iron and steel industry has paid attention to the study of changing trend and influencing factors of CO2 emissions from energy use. The logarithmic mean Divisia index (LMDI) technique is used to decompose total change in CO2 emissions into four factors: emission factor effect, energy structure effect, energy consumption effect, and steel production effect. The results show that the steel production effect is the major factor which is responsible for the rise in CO2 emissions; whereas the energy consumption effect contributes most to the reduction in CO2 emissions. And the emission factor effect makes a weak negative contribution to the increase of CO2 emissions. To find out the detailed relationship between change in energy consumption or steel production and change in CO2 emissions, the correlation equations are also proposed. 相似文献
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NS Alekaev 《Canadian Metallurgical Quarterly》1976,16(5):76-79
The study concerns the effect of angiotensin II when infused into the systemic and portal blood flow upon the general and renal haemodynamics in normal dogs and in hypertensive animals, as well as the effect of the operation of porto-caval transposition upon the course of renovascular hypertension. When peptide is infused, at a rate that causes a moderate pressor effect, into the systemic blood flow of normal animals, an antidiuretic and antinatriuretic effect is obtained, in hypertensive animals--an increase of diuresis, natriuresis and a less distinct pressor effect are obtained. When angiotensin II is infused into the portal flow, a less distinct pressor and renal effect is seen in animals with renovascular hypertension. The operation of porto-caval transposition of the vessels results in a hypotensive effect in the animals with renovascular hypertension. 相似文献
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A comprehensive review of effect size reporting and interpreting practices in academic journals in education and psychology. 总被引:1,自引:0,他引:1
Null hypothesis significance testing has dominated quantitative research in education and psychology. However, the statistical significance of a test as indicated by a p-value does not speak to the practical significance of the study. Thus, reporting effect size to supplement p-value is highly recommended by scholars, journal editors, and academic associations. As a measure of practical significance, effect size quantifies the size of mean differences or strength of associations and directly answers the research questions. Furthermore, a comparison of effect sizes across studies facilitates meta-analytic assessment of the effect size and accumulation of knowledge. In the current comprehensive review, we investigated the most recent effect size reporting and interpreting practices in 1,243 articles published in 14 academic journals from 2005 to 2007. Overall, 49% of the articles reported effect size—57% of which interpreted effect size. As an empirical study for the sake of good research methodology in education and psychology, in the present study we provide an illustrative example of reporting and interpreting effect size in a published study. Furthermore, a 7-step guideline for quantitative researchers is also summarized along with some recommended resources on how to understand and interpret effect size. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Geers Andrew L.; Weiland Paul E.; Kosbab Kristin; Landry Sarah J.; Helfer Suzanne G. 《Canadian Metallurgical Quarterly》2005,89(2):143
Motivational factors receive little attention in current theories of the placebo effect. Reasons for this position are reviewed, and an argument is made for reconsidering the influence of motivation on the placebo effect. The authors hypothesize that nonconscious goals alter reactions to a placebo expectation. Specifically, the authors predict that the placebo effect is most likely to occur when individuals have a goal that can be fulfilled by confirmation of the placebo expectation. The authors tested this notion in 5 experiments. The results demonstrate the role of motivation in the placebo effect across a variety of symptom domains and via 4 different goal activation techniques. Moreover, this moderating effect occurred for both positive and negative placebo expectations, across different placebo effect measures, and in brief laboratory experiments as well as in lengthier studies. It is argued that theories regarding the placebo effect should incorporate motivational factors. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献