共查询到20条相似文献，搜索用时 31 毫秒
1.
This paper presents a phenomenon of“Pseudo-resonance”of beams androds discovered from experiments and computations,and gives the definition of“Pseudo-resonance”.The relationship of distribution between the frequency of pseu-do-resonance and that of anti-resonance is found,and an analytic solution for thetransfer function between any two points on a beam or rod is established.The law ofdistribution of the anti-resonant frequencies,as well as the relation between the fre-quency distribution and the nodes of vibration is also proposed. 相似文献
2.
Sri Rahayu Masakazu Kita 《International Journal of Science and Mathematics Education》2010,8(4):667-688
This study investigated Indonesian and Japanese students’ understandings of macroscopic and submicroscopic levels of representing
matter and its changes and the difficulties they have with these concepts. A multiple-choice questionnaire was constructed
and delivered to 447 Indonesian and 446 Japanese public senior high school students. The data were analyzed using quantitative
and qualitative methods. The findings of the study show students’ understandings of macro- and submicroscopic levels are stronger
for higher-grade levels, except that the Indonesian students’ pattern is slightly different. The average percentage of students
responding correctly on the macroscopic level ranges between 62% and 69% (Indonesia) and between 58% and 73% (Japanese), whereas
on the submicroscopic level ranges between 56% and 62% (Indonesian) and 44% and 66% (Japanese). Their understandings of the
macroscopic level, however, are higher than for the submicroscopic level. The soundness of students’ understandings of the
concepts increases with grade level, except for Indonesian pattern slightly different. The average percentage of students
responding correctly ranges between 37% and 48% (Indonesian) and between 28% and 52% (Japanese). Furthermore, students’ level
of sound understandings of the concepts is lower than their understandings on either the macroscopic level or the submicroscopic
level. It is found that students have great difficulties with and hold some alternative conceptions of the concepts of homogeneous
mixtures, phase changes from solid to liquid, and phase changes from solid to gas. The study has implications, for example,
the use of several routes to meaningful learning and the careful use of technical words. 相似文献
3.
ＩＮＴＲＯＤＵＣＴＩＯＮＡｎＡｄｅｎｏ ａｓｓｏｃｉａｔｅｄｖｉｒｕｓ(ＡＡＶ)ｐａｒｔｉｃｌｅｉｓｃｏｍｐｏｓｅｄｏｆｔｈｒｅｅｓｔｒｕｃｔｕｒａｌｐｒｏｔｅｉｎｓａｎｄａｌｉｎ ｅａｒ ,ｓｉｎｇｌｅ ｓｔｒａｎｄｅｄＤＮＡ (ｓｓＤＮＡ)ｇｅｎｏｍｅｏｆａｐｐｒｏｘｉｍａｔｅｌｙ 4 .7ｋｂ .ＡＡＶｉｓａｄｅｆｅｃｔｉｖｅｈｕ ｍａｎｐａｒｖｏｖｉｒｕｓｔｈａｔｎｏｒｍａｌｌｙｒｅｐｌｉｃａｔｅｓｐｒｏｄｕｃ ｔｉｖｅｌｙｏｎｌｙｉｎｔｈｅｐｒｅｓｅｎｃｅｏｆｈｅｌｐｅｒｆｕｎｃｔｉｏｎｓｐｒｏｖｉｄｅ… 相似文献
4.
The written representation in Chinese can be considered as a pictorial or a symbolic representation which is very different
from English where the pronunciation is related to how the word is spelt. Students face challenges of a very different nature
when science is learnt in Chinese compared with English. In Hong Kong, students are making translations between the language
they use in their daily lives, the science concepts and the scientific terms. The research team designed an interview protocol
for primary school pupils in order to identify the pupils’ alternative concepts of science and if these alternative concepts
are related to the structure of the Chinese language. The findings suggest that there are alternative conceptions related
to (a) the form of the Chinese character—for example, the Chinese character for crocodile includes a radical meaning fish,
and so pupils may take it that a crocodile is a fish; (b) the meaning of the Chinese character—for example, an electronic
buzzer is a device used to attract bees as in Chinese, the character contains the word meaning “bees producing sound”. The
findings provide important data for future endeavours aiming to compare the learning of science using different languages
and on ways in which primary teachers may better facilitate their pupils in learning science. 相似文献
5.
Southeast University,located at central part of ancient capital city of Nanjing nearbeautiful Xuan Wu Lake,is one of the key universities operated direclty under the StateEducation Commission of China.Southeast University is one of the oldest institutions ofhigher learning in China.Its origins go back to 1902.Southeast University,with fullrange of disciplines and strong faculties,comprises of Graduate School,Faculty of Arts,Faculty of Sciences,15 individual departments of Engineering,Management School,Adult Education School and one Satellite College in Wuxi.It has 22 departments,43 un- 相似文献
6.
IntroductionPart Ⅰ: The similarities and differences between Chinese and Englishi dioms1. Two similarities.2. Three differences.Part Ⅱ: Five methods used in idioms translation.1. Literal translation.2. Equivalent translation.3. Free translation.4. Combination of literal and free translation.5. Translation with annotation.Part Ⅲ: Essential opinions on idioms translation.Conclusion 相似文献
7.
ＳＹＮＴＨＥＳＩＳＯＦＳＯＬＩＤＡＮＤＰＬＡＮＥＰＡＴＴＥＲＮＺｈａｎｇＹｉｎｇ（张颖）；ＣｈｅｎＷｅｉｎａｎ（陈维南）（ＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｏｆｆＡｕｔｕｍａｔｉｏｎ）ＳＹＮＴＨＥＳＩＳＯＦＳＯＬＩＤＡＮＤＰＬＡＮＥＰＡＴＴＥＲＮ￥Ｚ... 相似文献
8.
This paper presents a simple and feasible method of estimating the means andcovariances of system noises.The information about the means and covariances is derivedfrom a suboptimal Kalman filter formed via the approximate statistics.An efficientalgorithm is obtained through WLS(weighted-least-square)estimation by using themeasurement residuals of the suboptimal Kalman filter.Simulations are given to show theefficiency of the method. 相似文献
9.
ＩＮＴＲＯＤＵＣＴＩＯＮＨｅｔｅｒｏｄｉｎｕｃｌｅａｒｃｏｍｐｌｅｘｅｓａｒｅｏｆｇｒｅａｔｉｍ ｐｏｒｔａｎｃｅｆｏｒｔｈｅｓｔｕｄｙｏｆｔｈｅｓｙｎｅｒｇｉｓｔｉｃｅｆｆｅｃｔｓｆｏｕｎｄｉｎｂｉｍｅｔａｌｌｉｃｃａｔａｌｙｓｉｓ (Ａｄａｍｓ,1 988;Ｒｅｄｄｙｅｔａｌ.,1 989;Ｚｈｅｎｇｅｔａｌ.,1 989;Ｗｅｒｎｅｒｅｔａｌ.,1 992 ) ,ｗｈｉｃｈｉｎｄｉｃａｔｅｄｄｉｓｔｉｎｃ ｔｉｖｅｅｌｅｃｔｒｏｎｉｃ ,ｅｌｅｃｔｒｏｃｈｅｍｉｃａｌａｎｄｍａｇｎｅｔｉｃｐｒｏｐｅｒｔｉｅｓａｒｉｓｉｎｇｆｒｏ… 相似文献
10.
In this paper,the authors point out and demonstrate the difference of theconcepts concerning co-satisfiable and co-valid between one first-order language andtwo first-order languages,and put forward the concepts about uniform co-identical truthand uniform co-satisfiability.Thus some theorems in the book“A Course inMathematical Logic”,written by J.L.Bell and M.Machover,are corrected. 相似文献
11.
12.
C. R. MORRIS 《Higher Education Quarterly》1961,15(4):327-336
13.
14.
ＩＮＴＲＯＤＵＣＴＩＯＮＤＮＡｆｉｎｇｅｒｐｒｉｎｔｉｎｇｉｓａｍｅｔｈｏｄｆｏｒｐｒｏｄｕｃｉｎｇｔｈｅＤＮＡｆｒａｇｍｅｎｔｂａｎｄｐａｔｔｅｒｎ ,ｓｐｅｃｉｆｉｃｆｏｒｔｈｅｇｅｎｏｍｅｏｆａｃｅｒｔａｉｎｉｎｄｉｖｉｄｕａｌ.Ｔｈｅｐｒｏｄｕｃｔｉｏｎｏｆｔｈｅｉｎｄｉｖｉｄｕａｌｓｐｅｃｉｆｉｃｂａｎｄｐａｔｔｅｒｎｉｓｂａｓｅｄｏｎｔｈｅｓｉｍｕｌｔａｎｅｏｕｓｄｅｔｅｃｔｉｏｎｏｆｓｅｖｅｒａｌｈｉｇｈｌｙｐｏｌｙｍｏｒｐｈｉｃ,ｒｅｐｅｔｉｔｉｖｅｇｅｎｏｍｉｃｒｅｇｉｏｎｓ,ｗｈ… 相似文献
15.
Mei-Shiu Chiu 《International Journal of Science and Mathematics Education》2012,10(1):163-191
The aim of the present study was to identify children’s conceptions of learning mathematics and to assess the identified conceptions.
Children’s conceptions are identified by interviewing 73 grade 5 students in Taiwan. The interviews are analyzed using qualitative
data analysis methods, which results in a structure of 5 major conceptions, each having 2 subconceptions: constructivist (interest and understanding), interpretivist (liberty and innovation), objectivist (academic goal and perseverance), nativist (confidence and anxiety (reverse)), and pragmatist (vocational goal and application). The conceptions are assessed with a self-developed questionnaire, titled “the Conception of Learning Mathematics Questionnaire”
(CLMQ), which is administered to 513 grade 5 students in Taiwan and examined with a reliability measure, confirmatory factor
analysis, and correlations with 2 criteria: mathematics achievement and approaches to learning mathematics. The results show
that the CLMQ has desirable internal consistency reliability and construct validity. The conceptions are also sensibly in
relation to the 2 criteria, suggesting that the CLMQ is a valid measure for evaluating the quality of children’s learning
mathematics in relation to teaching contexts. 相似文献
16.
Lynn H. Willett 《Community College Journal of Research & Practice》2013,37(1):23-30
This study was designed to compare full‐ and part‐time faculty on three instructional effectiveness dimensions. Student ratings of teaching, course retention ratios, and subsequent student achievement in advanced courses were used to compare the two teaching groups. Multianalysis of variance (MANOVA), z‐test and analysis of covariance were used to analyze the two groups on the dependent measures. No significant differences were found between the two teaching groups on the effectiveness dimensions. Limitations of the study and future research directions are also discussed. 相似文献
17.
《长江工程职业技术学院学报》1991,(1)
In advanced stage of English language learning,students would meet witmany difficulties in understanding English in the original.Traditionaltranslation method fails to help students to overcome these difficulties,forin translation,they might give a word-for-word version.Translation inmother tongue is able to pour the surface meaning into students'brains,butit is not able to build a bridge from the surface meaning to the implicationin deep structures,and the original language materials can hardly be explo-ited to improve students'command of expression techniches.To avoid the 相似文献
18.
ＩｎＡｕｇｕｓｔ 2 0 0 2 ,ｔｈｅＨｕｍａｎＲｅｓｏｕｒｃｅＤｅｖｅｌｏｐ ｍｅｎｔＴｒａｉｎｉｎｇＴｅａｍｆｒｏｍｔｈｅＥＵ ＣｈｉｎａＰｒｏｇｒａｍｍｅｆｏｒｔｈｅＤｅｖｅｌｏｐｍｅｎｔｏｆＶｏｃａｔｉｏｎａｌＴｒａｉｎｉｎｇｆｏｒＩｎ ｄｕｓｔｒｙｖｉｓｉｔｅｄＨｕｂｅｉＸｉａｎｇｆａｎＶｏｃａｔｉｏｎａｌａｎｄＴｅｃｈｎｉ ｃａｌＣｏｌｌｅｇｅ.ＤｕｒｉｎｇｔｈｅＤｅｔａｉｌｅｄＴｒａｉｎｉｎｇＮｅｅｄｓＡｎａｌｙｓｉｓａｃ ｔｉｖｉｔｉｅｓｔｈｅＨＲＤＴｅａｍｖｉｓｉｔｅｄＸｉａｎｇｆａｎＶｏ… 相似文献
19.
Tolga Gok 《International Journal of Science and Mathematics Education》2012,10(2):417-436
The purpose of this study is to assess students’ conceptual learning of electricity and magnetism and examine how these conceptions,
beliefs about physics, and quantitative problem-solving skills would change after peer instruction (PI). The Conceptual Survey
of Electricity and Magnetism (CSEM), Colorado Learning Attitudes about Science Survey (CLASS), multiple-choice test was administered
as a pre- and posttest with Solomon 4 group design to students (N = 138) enrolled on freshman level physics course. The number of chapter taught to the students was 14. Problem-solving
strategy steps were asked to students in the exam. The analyses of CSEM showed that the treatment group (g = 0.62) obtained significantly higher conceptual learning gain than the control group (g = 0.36). The conceptual understanding and problem-solving skills of the students on magnetism considerably enhanced when
PI was conducted (37% and 20%, respectively). CLASS results for 5 subscales (conceptual understanding, applied conceptual
understanding, problem solving general, problem solving confidence, and problem solving sophistication) supported the findings
of CSEM. 相似文献
20.
PREPARATION AND CHARACTERISTICS OF NEW TYPE NANOCOMPOSITE POWDER 总被引：4，自引：0，他引：4
ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅａｕｔｈｏｒ’ｓｐａｓｔｒｅｓｅａｒｃｈｅｓｓｈｏｗｅｄｔｈａｔｅｌｅｃｔｒｏｌｅｓｓ ｐｌａｔｅｄｍｅｔａｌ ｃｅｒａｍｉｃｃｏｍｐｏｓｉｔｅｐｏｗ ｄｅｒｃｏｕｌｄｒｅｔａｒｄｃｅｒａｍｉｃｇａｉｎｇｒｏｗｔｈｄｕｒｉｎｇｔｈｅｓｉｎｔｅｒｐｒｏｃｅｓｓ,ｅｖｅｎｌｙｄｉｓｐｅｒｓｅｔｈｅｍｅｔａｌｌｉｃｐｈａｓｅｏｎｔｈｅｃｅｒａｍｉｃｍａｔｒｉｘａｎｄ ,ｔｈｅｒｅｆｏｒｅ ,ｉｎ ｃｒｅａｓｅｔｈｅｆｒａｃｔｕｒｅｓｔｒｅｎｇｔｈ ,ｔｏｕｇｈｎｅｓｓａｎｄｗｅａｒ… 相似文献