共查询到18条相似文献，搜索用时 343 毫秒
1.
林玉梅 《荆门职业技术学院学报》2006,21(6):8-11
在对几种单组分试剂的助磨作用试验的基础上,着重研究了双组分AG2复合助磨剂对水泥粉磨助磨效果及主要性能的影响.试验结果表明:AG2系列助磨剂的助磨效果较好,使水泥的粉磨细度提高了38.45%,其中AG28使3 d2、8 d抗压强度分别提高20.72%、13.73%,特别是用量为0.01%的AG210,使细度提高62.78%,使28 d抗压强度提高12.06%,具有明显的增产节能降耗、提高产品质量的作用. 相似文献
2.
林玉梅 《荆门职业技术学院学报》2003,18(6):4-7
在单组分、双组分助磨剂研究的基础上，探讨了三组分复合助磨剂ABGl、DEGl等对水泥粉磨作业的助磨作用及对水泥的主要性能的影响．试验结果表明：在正交组合的36个组分中，ABGl组合中，助磨效果较好的组分，可使水泥的粉磨细度提高61．1％，对水泥强度没有大的负面影响，也具有增产节能降耗、保证产品质量的作用． 相似文献
3.
本试验在对A、B、C、D、E、G1等6种试剂的助磨作用试验的基础上,着重研究了双组分AGl、BG1、DGl、EGl等复合助磨剂对水泥的助磨效果及主要性能的影响．试验结果表明：双组分AGl、BG1、DGl的助磨效果较好,使水泥的粉磨细度提高了63％—69％,其中AGl使3d、28d抗压强度分别提高25％、12％,特别是用量为0．01％的AGlIo,不仅使细度提高67．0％,而且使28d抗压强度提高12．9％,具有明显的增产节能降耗,提高产品质量的作用。 相似文献
4.
研究了不饱和Schiff碱作为双组分环氧煤沥青涂层缓蚀剂对船体钢的缓蚀性能，研究结果表明，缓蚀剂不仅可使双组分环氧沥青漆涂层的阻抗提高一个数量级，而且还可加强涂层的附着力，含有缓蚀剂A的涂层浸泡60天后，该涂层与金属基体表面仍然有较好的结合性。 相似文献
5.
水泥助磨剂的应用前景分析 总被引：1，自引：0，他引：1
阐述了助磨剂的作用机理，通过选定三乙醇胺、甲醇、氯化钴、乙二醇、油酸、化工废液作水泥助磨剂，实验印证水泥助磨剂的良好性能，并结合目前水泥行业的生产实际分析了水泥助磨剂的应用前景和开发中存在的问题及解决的方法． 相似文献
6.
城市道路旧水泥混凝土路面加铺沥青混凝土 总被引：2，自引：0，他引：2
黄晓东 《泰州职业技术学院学报》2004,4(3):26-29
近年来，已使用一定年限的旧水泥混凝土路面急需维修、加铺改造工程日益增多，结合南京市老城改造中旧水泥混凝土路面加铺改造工程实践。通过对旧水泥混凝土路面加铺分析，结合路面加铺改造方案的设计及玻璃纤维格栅的应用、改性沥青的应用等，阐述了延缓和防止路面加铺产生的裂缝对提高城市旧水泥混凝土路面使用寿命的作用。 相似文献
7.
通过对溶液酸度的pH标度、酸度函数H0、AG标度的比较分析,提出用酸度AG代替pH,并进行了一些探讨。 相似文献
8.
范建凤 《忻州师范学院学报》2003,19(2):64-66
对双组分物系的蒸馏方法进行了阐述，并就各种蒸馏方法馏出液的组成进行了分析。论述了各种蒸馏方法的特点以及适用范围，揭示出它们之间的彼此联系和区别。 相似文献
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10.
李云倩 《现代远程教育研究》1994,(11)
一第六章蒸馏本章中要求重点掌握:双组分理想物系的气液相平衡,精馏原理,双组分连续精馏塔的计算及板式塔的简单结构、操作特性。一、双组分溶液的气液相平衡本节中重点掌握理想溶液的气液相平衡。 相似文献
11.
Jean E. Pretz Kathryn Sentman Totz Scott Barry Kaufman 《Learning and individual differences》2010,20(3):215-219
In an experiment with 109 undergraduates, we examined the effect of mood, cognitive style, and cognitive ability on implicit learning in the Artificial Grammar (AG) and Serial Reaction Time (SRT) tasks. Negative mood facilitated AG learning, but had no significant effect on SRT learning. Rational cognitive style predicted greater learning on both tasks, but this effect on SRT was mediated by cognitive ability. SRT, but not AG learning was significantly correlated with Math and English scores on the ACT. These findings confirm and contradict previous research. The association of negative mood and rational cognitive style with AG confirms that AG learning is facilitated by systematic, bottom-up processing. However, the lack of converging evidence for the SRT task suggests that the tasks involve different aspects of implicit processing. Theoretical explanations and suggestions for future research are discussed. 相似文献
12.
The study examines the effects of classroom achievement grouping (AG) practices on the early mathematics performance of language-minority students and compares their mathematics achievement to that of English-speaking majority students. Using a nationally representative database of the USA, both cross-sectional and longitudinal analyses were done. In the cross-sectional analyses we explored the direct effect of grouping practice on students performance, while in the longitudinal analysis we looked at the growth trajectory in mathematics learning. The results of cross-sectional analyses indicated that the effect of AG was negative on the math achievement in 1st and 5th graders. The longitudinal analysis showed a significant negative effect of AG for English Language Learners (ELL). The paper provides the basis for practical guidelines for the grouping practices in mathematics. 相似文献
13.
帘青 《湖南师范大学社会科学学报》2001,30(5):81-83
评估体系具有导向性，现行评估体系对推动学报质量的提高了积极而巨大的作用，但由于它未能反映网络时代学报出版的新特点，有必要对其进行重构。如增加品牌与特色标准、编辑技术标准、网络版标准等内容；在经济效益指标中增加网络版下载量和光盘版发行量，在管理标准中强调先进出版工具和人才的管理等指标。 相似文献
14.
Sitthichai IAMSAARD Thawatchai PRABSATTROO Wannisa SUKHORUM Supaporn MUCHIMAPURA Panee SRISAARD Nongnut UABUNDIT Wipawee THUKHAMMEE Jintanaporn WATTANATHORN 《Journal of Zhejiang University. Science. B》2013,14(3):247-252
Objective:To investigate the effect of Anethum graveolens(AG) extracts on the mounting frequency,histology of testis and epididymis,and sperm physiology.Methods:Male rats induced by cold immobilization before treating with vehicle or AG extracts [50,150,and 450 mg/kg body weight(BW)] via gastric tube for consecutive 1,7,and 14 d were examined for mounting frequency,testicular phosphorylation level by immunoblotting,sperm concentration,sperm acrosome reaction,and histological structures of testis and epididymis,respectively.Results:AG(50 mg/kg BW) significantly increased the mounting frequency on Days 1 and 7 compared to the control group.Additionally,rat testis treated with 50 mg/kg BW AG showed high levels of phosphorylated proteins as compared with the control group.In histological analyses,AG extract did not affect the sperm concentration,acrosome reaction,and histological structures of testis and epididymis.Conclusions:AG extract enhances the aphrodisiac activity and is not harmful to sperm and male reproductive organs. 相似文献
15.
This study of 32 aggressive (AG) and 32 nonaggressive (NA) boys applied a social information processing analysis to interactions between children and their teachers. In a cue reading task, AG and NA subjects estimated teacher anger in ambiguous situations where the targets of the teacher behavior were the subjects, NA peers, and AG peers. AG boys predicted that greater teacher anger would be directed toward themselves than did NA boys. However, this could not be interpreted as an attributional bias specific to AG boys, because both NA and AG boys predicted that greater hostility would be directed toward AG boys. Target status was the primary determinant of cue interpretation. AG boys were more likely than NA boys to choose aggressive solutions to problems involving teachers and to judge aggressive solutions to be competent. The results suggested that NA subjects were actually more effective than AG subjects in enacting an aggressive response. 相似文献
16.
周蕊 《重庆职业技术学院学报》2012,(6):157-160
本文通过介绍新媒体、文献信息服务链的概念及特点,以河南省文献信息服务链为研究对象,从改变信息服务的“式”、提高信息服务的“质”、充实信息服务的“量”、提升信息服务的“效”四个方面展现了新媒体在河南省文化产业发展中的正能量作用。 相似文献
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目的:观察一氧化氮(NO)供体硝酸异山梨酯(Isosorbride Dinitrate,ID)及一氧化氮合酶(NOS)抑制剂氨基胍(Aminoguanidine,AG)对双侧卵巢切除(OVX)大鼠骨组织形态计量学的影响。方法:49只雌性大鼠随机分成7组,每组7只。①假手术(Sham)组、②卵巢切除(OVX)组、③卵巢切除 雌激素(OVX EB)组、④卵巢切除 NO供体(OVX ID)组、⑤卵巢切除 NO供体和雌激素(OVX ID EB)组、⑥卵巢切除 NOS抑制剂(OVX AG)组、⑦卵巢切除 NOS抑制剂和雌激素(OVX AG EB)组。实验10周后处死大鼠,对第4、5腰椎进行骨组织形态计量学分析。结果:与Sham组相比:OVX组、OVX AG组和OVX AG EB组组织形态计量学参数BV/TV和Tb.Th减少,Tb.Sp和MAR增加(P<0.05);而OVX EB组、OVX ID组和OVX ID EB组骨组织形态计量学参数BV/TV、Tb.Th、Tb.Sp和MAR均无明显差异(P>0.05)。与OVX组相比:OVX EB组、OVX ID组和OVX ID EB组骨组织形态计量学参数BV/TV和Tb.Th明显增加,Tb.Sp和MAR明显减少(P<0.05);而OVX AG组和OVX AG EB组骨组织形态计量学参数BV/TV、Tb.Th、Tb.Sp和MAR均无明显差异(P>0.05)。结论:NO供体预防OVX鼠骨丢失,NOS抑制剂则阻止雌激素预防OVX鼠骨丢失的作用。 相似文献
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大学创新团队建设是建设高水平大学的重要举措。在建设大学创新团队的实践中,目前人们似乎更注重创新团队数量的拓展,而对创新团队增效机制的研究还缺乏认真的关注。在建设大学创新团队的实践中,明确的共同愿景是创新团队聚合增效之基,达成心理契约是创新团队耦合增效之力,提倡头脑风暴是创新团队激智增效之道。 相似文献