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1.
In recent years, the usages of by-products and wastes in industry have become more important. The importance of the sustainable development is also of increasing. The utilizations of wastes, as mineral admixture or fine aggregate, reduce the consumption of the natural resources and improve the durability of concrete. In this study, the effect of the fineness on the high temperature and sulphate resistances of concrete mortar specimens, produced with ground granulated blast-furnace slag (GBFS) replacing cement, is investigated. The compressive and flexural strength test results for all series related to durability effects, exposing temperature and solutions, exposure times for these durability effects, slag content and fineness are discussed. Conse- quently, the optimum slag contents are determined for producing the sulphate and high temperature resistant mortars.  相似文献   

2.
INTRODUCTION Time dependence study of metal ions adsorptionon solids provides valuable information on the ad-sorption process and its mechanism. Rate of metalions adsorption process is dependent on a number offactors such as agitation of the solution, the state ofmetal ions in solution, concentration of metal ions andtemperature (Benes and Majer, 1980). Temperature isthe parameter generally ignored in most adsorptionstudies (Bangash and Hanif, 1992; Afzal et al., 1993;Atun and Kil…  相似文献   

3.
Diversity and convergence The Internet is so deeply ingrained in our lifes and its scale is so large, its future development must be through evolution (migration); a wholesale replacement, even with something vastly better, is impractical. However, many attempts to upgrade Internet services in the past have  相似文献   

4.
Aiming at arousing people＇s cultural sensitivity, enriching people＇s knowledge of other cultures and increasing people＇s awareness of intercultural communication, the paper, based on the Ballad of Mulan and Disney Mulan, reaches some conclusions about cultural integrations and differences between China and America by comparisons and analyses of Mulan＇s images in the two subjects. Meanwhile, the paper illustrates the trend of ＂cultural glocalization＂ by way of case studies. Finally, the paper brings the conclusion that people should interpret transculturational outcomes from a broad perspective and with an advisable attitude, so that various cultures can achieve harmonious development in multicultural era.  相似文献   

5.
In vocabulary testing, whether to adopt context is a heat-debated topic. In the article, an experiment is designed to investigate what is the effect of zero context and sentence context on the vocabulary testing？ And how do the different kinds of context in vocabulary affect the subjects＇ performance？ The experimental result demonstrates that sentence plays an important role in helping text-takers to figure out the correct meaning or target words.  相似文献   

6.
1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｉｔｉｓｋｎｏｗｎｔｈａｔｔｈｅｐｒｏｔｅｃｔｉｏｎｅｆｆｉｃｉｅｎｃｙｏｆｚｉｎｃｉｓｐａｒｔｉａｌｌｙａｓａｒｅｓｕｌｔｏｆｆｏｒｍｉｎｇａｐｒｏｔｅｃｔｉｖｅｆｉｌｍｏｎａｂａｓｅｍｅｔａｌ,ｓｕｃｈａｓｓｔｅｅｌ.Ａｌｔｈｏｕｇｈｐｕｒｅｚｉｎｃｃｏａｔｉｎｇｐｒｏｖｉｄｅｓｓｏｍｅｄｅｇｒｅｅｏｆｐｒｏｔｅｃｔｉｏｎｆｏｒｔｈｅｓｕｂｓｔｒａｔｅ ,ｚｉｎｃｉｓｃｏｎｓｕｍｅｄｒａｐｉｄｌｙｉｎａｓｅｖｅｒｅｃｏｒｒｏｓｉｏｎｅｎｖｉ ｒｏｎｍｅｎｔ.Ｃｏｎｓｅ…  相似文献   

7.
侯鹏 《忻州师范学院学报》2004,20(6):100-103,114
反复是语言交际的重要手段之一，是话语结构中一个看似简单，实则重要、却容易忽视的语言现象及语言组成结构。它既存在于口语语言使用中也存在于书面语中。本文回顾了过去对反复的研究，主要包括修辞、会话分析以及语言习得等，提出了用语用学的方法来研究汉语中反复的运用。  相似文献   

8.
本文介绍了进食障碍的主要表现,引入人本主义心理学家马新洛的需要层次理论,从生理需要、安全需要、归属与爱的需要、尊重需要及自我实现需要的缺失方面分析了进食障碍患者的心理现状以及进食障碍的形成原因.  相似文献   

9.
FOR THE GEO一TEEHNIEAL DESI，PARAMETERS OF 5011，EOMPARISON OF SEISMIE RESPONSES BASED ON DIFFERENT THE UNEVEN DISTRIBUTION OF THE DIFFERENT KINDS OF 5011 METHODS TO EVALUATE THE 5011 FUNETIONS.IN ADDITION， AND SAMPLING LOCATIONS DURING EXPLORATION AND I…  相似文献   

10.
Titaniumalloyisakindofdesirablemetallicbioma terialforimplantingandrepairingbodyhardtissuesduetoitsbetterbiocompatibilityandmechanicalproper ties[1,2 ] .However ,itcansuffercertaindisadvantages ,suchaspoorosteoinductive ,andlowcorrosivewearresis tance .So ,itisveryimportanttoimprovethejointprop ertiesbetweentitaniumalloyandhumanbody .Hydrox yapatite(HAP)isknowntobebiocompatibleandtoformadirectbondwiththeneighboringbonesduetoitscrys tallographicalandchemicalsimilaritywithvariouscalci fiedtissu…  相似文献   

11.
1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｍｏｎｏｃｒｏｔｏｐｈｏｓａｎｄｐａｒａｔｈｉｏｎ ｍｅｔｈｙｌ,ｗｈｉｃｈｂｅｌｏｎｇｔｏｏｒｇａｎｏｐｈｏｓｐｈｏｒｏｕｓｐｅｓｔｉｃｉｄｅｓｗｉｔｈｓｔｒｏｎｇａｎｄｅｘ ｔｅｎｓｉｖｅｐｏｉｓｏｎ ,ｗｅｒｅａｐｐｌｉｅｄｗｉｄｅｌｙｆｏｒｔｈｅｐｒｅｖｅｎｔｉｏｎａｎｄｃｏｎｔｒｏｌｏｆｐｌａｎｔｄｉｓｅａｓｅｓａｎｄｅｌｉｍｉｎａｔｉｏｎｏｆｐｅｓｔｓ .Ｉｔｉｓｔａｋｅｎｍｏｒｅａｔｔｅｎｔｉｏｎｔｏｓｔｕｄｙｔｈｅｐｏｔｅｎｔｉａｌｈａｒｍｔｏｐｅｏｐｌｅｓ…  相似文献   

12.
Controllingschistosomiasisisatroubleproblemintheworldyet.Twofociofresearchareputondiagnosisandvaccine.Findingpathogenandimmunlolicalmethodsaretwokindsofdiagnosisforschistosomiasis.TherearefaultsinthesetwomethodsalthoughtheyplayanimPOrtantroleinpractice.Wormslivinginbloodvesselarecharacterizedbysheddingexternalplasmamembrane.Themembrane,tegumentcellsandtheirsecretionaredestroyedanddegradedaftertheyenterintobbod.Nucleicacidofpathogenmaypresentinblood.IfDNAorRNAsegmentsofwormsarefoundoutitis…  相似文献   

13.
Pin and socket contacts are the key parts of electrical connector as aerospace electronic components. The contacts are also the direct carriers for signal transmitting of electronic equipments, passing the signal from the input end to the output end of electrical connector. The reliability of pin and socket contacts directly influences signal transmission. The goal of this study is to enhance the contact reliability of aerospace electrical connector. Computer simulation analysis was made on contacts performance data by utilizing the simulation system developed by PCL Language of MSC software. Furthermore, the results were experi- mentally validated so as to realize the objective of optimizing contacts design.  相似文献   

14.
Enhancing the dispersion and dissolution of substrate particles in substrate water suspension is a feasible way to improve steroid bioconversion. The aim of the present study is to investigate the effects of applying surfactant to microbial conversion system on the dispersion, solubilization and in turn bioconversion of steroid substrate. The model system is hydroxylation of substrate 19α- 17α-epoxy- 4-pregnene- 3.2It-dine by microbial enzymes from Rhizopus nigricanl. The results show that the presence of substrate leads to an increase in critical micelle concentration （ CMC） of surfactant PSE compared with the normal CMC of PSE in aqueous solution. The grinding time during substrate suspension preparation affects the substrate aqueous solubility differently with the varied surfactant concentrations while barely making any difference in substrate solubility in the absence of surfactant. The properly prolonged grinding time can make up for the loss in substrate solubility arising from the reduction in surfactant concentration. The surfactant complexes composed of surfactants PSE and MGE at appropriate ratios are screened out with orthodoxy experiment method. the interaction between PSE and MGE exerts the most prominent effects on substrate bioconversion, and the surfactant complexes show more beneficial effects on steroid bioconversion than the surfactant PSE used alone.  相似文献   

15.
Assessment is a critical issue in the teaching andlearning of mathematics. For many students, theassessment is still one that is based on a behaviouristapproach where discrete facts and skills are tested,where grading and ranking are the primary goals.Kilpatrick argues that an alternative vision isnecessary for today's classrooms. The challenge is toproduce an assessment practice that does more thanmeasures a person's mind and then assign a mindtreatment. We need to understand how people cometo use mathematics in different social settings and  相似文献   

16.
The Chinese higher nursing education has developed fast. People＇s opinions to it have changed. In the future, it will show the developmental trends as follows. The scale of higher nursing education will be enlarged and educational levels will be improved continuously. The professional characteristics will be further focused on in nursing curriculum system. Teaching methods will be diversified to help the students to improve their abilities. The internationalization will be the developmental trend of nursing education. The development of nursing education puts forward higher demands for the faculties. How to cultivate the higher-quality nursing faculties has received increasing attention over the past few years as a common problem with serious consequences for the qualities of the students. It needs to equip the human resources of nursing teachers to be perfect, establish the academic faculty echelon and intensify the general qualities of nursing faculties. The nursing teachers should improve their theoretical and educational levels, develop the teaching capabilities, possess the capabilities of scientific research, enhance the clinical practical capabilities, improve the application abilities of the foreign language and cultivate the humanistic qualities to train the excellent students.  相似文献   

17.
INTRODUCTION Parts of complex surfaces have found wide ap-plications today in airplane,ship,automobile industry,medical science,etc.How to detect the internal de-fects of parts of complex surfaces efficiently and ac-curately is an important issue.Due to its special ad-vantages of high sensitivity,good detection,strong penetration ability,and harmlessness to human body,ultrasonic detection has become a most important method of Nondestructive Test(NDT).However,at present in China,to detec…  相似文献   

18.
INTRODUCTION Finishing is a kind of machining technology for greatly increasing the surface quality of a machined object while maintaining stable precision and im-proving the machining precision grade.Finishing is the last procedure for most parts and is an important manufacturing technology.Finishing can be divided into two kinds of technologies.One is traditional finishing which util-izes mechanical processes such as grinding,abrading,polishing,etc.;the other is non-traditional finishin…  相似文献   

19.
In this paper, the reliability of contactor relay is studied. There are three main parts about reliability test and analysis. First, in order to analyze reliability level of contact relay, the failure ratio ranks are established as index base on the product level. Second, the reliability test method is put forward. The sample plan of reliability compliance test is gained from reliability sample theory. The failure criterion is ensured according to the failure modes of contactor relay. Third, after reliability test experiment, the analysis of failure physics is made and the failure reason is found.  相似文献   

20.
In the current work, we examined learners’ comprehension when engaged with elaborative processing strategies. In Experiment 1, we randomly assigned students to one of five elaborative processing conditions and addressed differences in learners’ lower- and higher-order learning outcomes and ability to employ elaborative strategies. Findings indicated no significant differences among conditions on learning outcomes. However, learners better able to employ elaborative processing strategies performed better on outcome measures. Experiment 2 extended this research and addressed whether there would be differences across elaborative processing conditions in learners’ comprehension at delayed testing. We also examined the role of motivation in performance and strategy use. Findings indicated no differences on the outcome measures at delayed testing; however, there were significant differences in learners’ performance on an integration outcome at immediate testing. In addition, significant positive correlations were indicated for several outcome measures, strategy use and mastery orientation. Future research should further consider instructional scaffolds to promote learners’ strategic processing and critical individual difference variables as they effect elaborative processing.  相似文献   

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