共查询到20条相似文献，搜索用时 169 毫秒
1.
In this work, polypropylene （PP）/polystyrene （PS） blends with different organoclay concentrations were prepared via melt compounding. Differing from the results of previous reports, the organoclay platelets are mostly located in the dispersed PS phase instead of the interface. The dimensions of the dispersed PS droplets are greatly reduced and apparent compatibilization effect still exists, which cannot be explained by the traditional compatibilization mechanism. A novel compatibilization mechanism, ＂cutting＂ to apparently compatibilize the immiscible PP/PS blends was proposed. The organoclay platelets tend to form a special ＂knife-like structure＂ in the PS domain under the shear stress of the continuous PP phase during compounding. The ＂clay knife＂ can split the dispersed PS domain apart and lead to the dramatic reduction of the dispersed domain size. 相似文献
2.
Sirin Akbulut 《美中教育评论》2011,(3):354-369
First musicians using polyphony and homophony in their compositions can be seen during the 19th century in Turkey. These talented amateur composers, who worked in simple forms, such as marches or educational music, were not actually professional composers but either orchestral or choral directors. Later, during the Republic period （after 1923）, ＂Turkish Five＂ emerged. ＂Turkish Five＂ consisted of professional composers who were educated in Europe and learned western musical forms. These musicians, according to their birth years, are Cemal Resit Rey （1904-1985）, Hasan Ferit Alnar （1906-1978）, Ulvi Cemal Erkin （1906-1972）, Ahmet Adnan Saygun （1907-1991） and Necil Kazan Akses （1908-1999）. ＂Turkish Five＂ achieved important accomplishments and did significant contributions to Turkish contemporary music in 30-40 years with their efforts. While doing this, they used over 500-year old musical legacy of the West. At the beginning, these musicians used Turkish folk tunes and their rhythmic and modal system, however, later, they began to use ＂impressionism＂, ＂neo-classicism＂ and finally ＂atonalism＂ in their music. In the current study, the contributions of ＂Turkish Five＂ to contemporary Turkish piano music and their approaches to piano education were examined via literature review. After an extensive research with the literature on the topic, the researcher has interviewed with six piano teachers from different music institutions in Turkey （including two schools of time arts, two conservatories and two music teacher training schools）. During these interviews, the contributions of the ＂Turkish Five＂ were examined based on ＂relativity＂ and ＂local to global＂ principles in education, and the researcher has searched for the ways to use more of their music in piano education through the interviews. Therefore, the main purpose of the study was to discover ways to implement more of the music by ＂Turkish Five＂ in piano education in Turkey and to ffmd solutions fo 相似文献
3.
The influence of external low frequency (0-100 Hz) vibration on the tip-sample interaction in SPM is the main concern of this paper. A concept, vibration rejection ratio (VRR) proposed by Thompson et al, was investigated theoretically and experimentally. A concise theoretical background was introduced, a vibration stimulating and measuring system for SPM was built up, and an experimental research of the influence on SPM VRR was carried out with different SPM probes, samples, tip pre-loads and open/close loops of tip-sample interaction. It was proved both in theory and experiment that SPM VRR had correlations with the spring constant, the air damping constant, the effective mass of the cantilever, the contact spring constant and the contact damping constant between tip and sample. SPM's vibration rejecting ability can be improved by longer cantilever probe, softer sample surface, greater tip pre-load, and close-loop control for tip-sample interaction. More attention should be paid to a proper combination of the above parameters. 相似文献
4.
To many Chinese students, learning the words such as ＂make＂ and ＂do＂ seems a piece of cake, yet learning how to use them appropriately is anther case. This paper aims to investigate Chinese learners＇ use of the verbs ＂make＂ and ＂do＂, two major representatives of high-frequency words from the perspective of de-lexical uses by comparing authentic learner data with native speaker data using computerized corpora, thus to shed some light on vocabulary learning and teaching in China. 相似文献
5.
This early spring, my father and I went to visit Shantou in Guangdong Province. One afternoon, we went to visit the seabeach. The wind was warm, but strong. The wave struck the large stones which stood in the water firmly and made loud noise. The surface of stones was smooth because of the waters striking them year after year.I admired the strength of nature！ 相似文献
6.
Magellan was born in the spring of 1480 in Portugal.His mother was anoble.But when he was 10 years old,his parents died.He was educated atcourt and became interested in exploring.At the age of 25,he sailed to Indiaand Philippine. 相似文献
7.
《云南教育》2002,(8)
It was beautiful spring weather,but neither dogs nor humans were aware of① it.Each day the sunrose earlier and set later.It was dawn by three in the morning,and twilight② lingered till nine atnight.The whole long day was a blaze of sunshine.The ghostly winter silence had given way to③ the 相似文献
8.
Chih-Cheng LIN 《美中教育评论》2010,(11):36-43
This paper was intended to investigate the effects of using e-books （or texts with multimedia support） in an ERP （extensive reading program） on EFL （English as a foreign language） learners＇ attitudes toward reading in English. In a junior high school in northern Taiwan, 109 students from 3 intact classes were recruited in the 10-week ERP of e-books. Each class was introduced to a list of 140 selected e-books for the reading program; each student was then encouraged to read e-books after school, with the target of reading 4 e-books every week. The degree of changes in reading attitudes was assessed by using the reading attitudes scale （Stokmans, 1999） before and after the e-book ERP. In addition, the teacher＇s class notes of the students＇ reading behaviors and reactions as well as their spontaneous oral or written feedback were analyzed to be triangulated with the quantitative data. The results showed that the e-books had positive effects on the students＇ attitudinal changes in all dimensions of reading attitudes, namely, utility, development, enjoyment and escape, as well as in all the cognitive, affective and conative components. The results also showed that the features of the e-books, especially oral reading, highlighting, animations and music/sound effects, were considered important to change their attitudes. The implementation of interaction and learner control in the e-books guaranteed positive attitudinal changes as well. 相似文献
9.
The medium of （oral） language is mostly disregarded （or overlooked） in contemporary media theories. This ＂ignoring of language＂ in media studies is often accompanied by an inadequate transport model of communication, and it converges with an ＂ignoring of mediality＂ in mentalistic theories of language. In the present article it will be argued that this misleading opposition of language and media can only be overcome if one already regards oral language, not just written language, as a medium of the human mind. This paper fall back on Wittgenstein＇s conception of language games to try to show how Wittgenstein＇s ideas can help us to clear up the problem of the mediality of language and also to show to what extent the mentalistic conception of Chomskyan provenance cannot be adequate to the phenomenon of language. 相似文献
10.
Christmas was coming. Mr Smith had no money to buy any presents for his children. His wife was ill and he spent a lot of money on her medicine. And the harvest was bad and all his family were going to be hungry the next spring. He was quite worried about it."We had only a cock,"said Mrs Smith one day. "You'd better take it to the town. Sell it there and buy some cakes and sweets for our children." 相似文献
11.
CHEN Hong-qin 《美中教育评论》2008,5(5):54-59
According to the theory of Systemic-Functional Linguistics （SFL）, language cannot be disassociated from meaning. Function and semantics, as SFL suggests, are considered as the basis of human language and communicative activity. In order to reveal the inseparability of language and semantic, this paper aims to analyze and appreciate Hardy＇s poem ＂Neutral Tones＂ as a piece of literary work based on the theory of functional analysis specifically on field, tenor and mode. 相似文献
12.
SHI Xue-yun 《美中教育评论》2007,4(3):48-53
＂EGao＂ is a network producing form and is popular in campus. In order to amuse the masses, it changed and reformed films, TV, picture menus and songs by imitating, overdrawing and self-betrayal means. The impact of ＂EGao＂ is greater and greater in the young, especially in the university, it has become a fashion. The paper analyzed its concepts, types and social psychology attribution, in the same time, put forward some advices on how to treat the following social and mental problems. 相似文献
13.
Aspergillus oryzae 3042 mycelium pellets were immobilized by crosslinking method with reagents of gelatin and formaldehyde. An orthogonal design table was used to determine the optimal immobilization conditions. The L-aminoacylase activity of immobilized mycelium pellets under optimal conditions was assayed. The results show that the L-aminoacylase activity was 1 350 U·g-1. and the activity retention rate was 83%. The properties of the immobilized preparation were studied. Compared with free pellets, the appropriate pH of reaction system changed from 7.0 to 8.0, temperature changed from 52℃to 63℃, and the ranges of the optimum reaction conditions were all improved. The effect of Co2 on immobilized mycelium pellets was investigated and the favorable concentration was determined. When the immobilized preparation was used for the resolution of D, L-alanine in a packed bed reactor with 10 mm in diameter, 200 mm in height, the operational stability was increased, and the half-life period was 53 d. Thermal stability analysis shows that the immobilized pellets were more stable than the free pellets. 相似文献
14.
Information and communication technology （ICT） has been considered as an enabling tool for having more effective and efficient operations in the management of logistics and supply chains for many years. Various information and communication technologies are used to improve perfor- mance of the logistics and supply chain network, such as ＂data mining＂, ＂radio frequency identification （RFID）＂, ＂machine learning＂, ＂smart transportation＂. While ICT systems are vital components in logistics and supply chains, their successful management rests on intelligent and inte- grated decision making throughout the logistics network. Intelligent decision technologies are applied to collect and store real-time data and then analyze and interpret the data and information of product, inventory, manufacturing and sales to discover useful knowledge for making better operation and management decisions. Advanced simulation and optimization of planning and scheduling systems are also used for improvement of inventory, production, pro-curement, and distribution planning. Intelligent agents can communicate with different partners in the supply chain, assist in collecting information, share product information, negotiate prices, and distribute alerts throughout the logis- tics and supply chains networks. 相似文献
15.
YIN Zhao-hui LIU Qiong 《美中教育评论》2007,4(3):13-19,24
In today＇s China, there exists a self-contradictory fact——on the one hand, China is in short of educational resources, and the average educational level of the total population is fairly low; on the other hand, many graduates are facing difficulties in finding positions or are taking positions requiring lower degree employees, which leads to so-called over-education and intellectual unemployment phenomenon in China. The paper analyzes the nature and causes of the over-education phenomenon. It argues that the present over-education phenomenon in China does not mean the surplus of the total educational amount, but is actually the result of ＂structural in-equilibrium＂ of higher education. The underlying reasons can be traced back to the influence of Chinese traditional culture, the existence of binary economic structure, administrative-led educational system, and inflexible market-information transferring system. 相似文献
16.
From the case study of Evening Bell Ringing at Nanping Hill,one of the West Lake Cultural Landscapes in Hangzhou,China,we investigated the soundscape of a scenic area with a profound cultural background.First,we conducted the soundscape physical index of the area in both winter and spring seasons to analyze its objective graphical expression.Second,we focused on people’s reactions to the soundscape in order to obtain a subjective evaluation of each component in the soundscape and integrated environment.Then,the relationship between the objective data and the subjective evaluation was analyzed.Finally,the impacts of the natural environment,history,and cultural factors on the evaluation of the Jingci Temple soundscape were studied.It was found that natural sounds,cultural sounds,and historic sounds were widely acclaimed in people’s subjective feelings,which indicated the close relationships among historical and cultural background,soundscape,and natural environment.Thus,the conclusion was made that soundscape should be consistent with the local natural environment and the historical and cultural background. 相似文献
17.
Sou-Kuan VONG 《美中教育评论》2006,3(5):11-18,26
The first wave of educational reforms in Macau took place in late 80s and early 90s. In 1991, the first Education Law was approved in Legislative Council. It signified a path leading to more ＂disciplined＂ education system. It was then by legislative means through standardization, regulations, implementation of the universal free education, establishment of the ＂public school net＂, construction of a ＂localized＂ curriculum framework, and the definition of various kinds of teacher education enabled the government to participate in overall educational matters. Among all, curriculum development is a significant component in the arena of educational reform. The localized curriculum was first implementation in 1995 in all government schools with Chinese as a medium of instruction, and was not compulsory in private schools. Macau is now starting a second wave of educational reform, with special attention to the re-construction of the present curriculum. Thus, it is the objective of this study to examine and disclose the discourses and practices of the curriculum development in the territory in order to re-vision the future development. The time travelling tunnel gives two scientists the ability to travel in time and space in the television series in the UK in 1960＇s. In this paper, ＇excursion into the time tunnel＇ is used metaphorically, to describe the research process for it is to be adventure and an exploration. Furthermore, the metaphor ＇time tunnel＇ also bridges the present to the past and the future. This is how the author attempts to reveal the story of discourses and practices of the curriculum development in Macau through the ＇time tunnel＇ interweaving with the past, the present and the future. This study stems from a particular stance of educational policy analysis. The study is informed by aspects of critical and post-structuralist perspective, with particular reference to Michel Foucault. In this paper, official document, namely Gazette （known as Boletin Oficial in Portuguese） is the focal point of interest. 相似文献
18.
Effects of zinc on cadmium uptake by spring wheat （Triticum aestivum, L.）： long-time hydroponic study and short-time ^109Cd tracing study 总被引：2，自引：0，他引：2
To investigate effects of Zn on Cd uptake by spring wheat (Triticum aestivum, L.) in solution culture, long-time hydroponic experiment (1 month) (Experiment 1) and short-time Cd isotope (109Cd) tracing experiment (24 h) (Experiment 2) were conducted. In Experiment 1, spring wheat (cv. Brookton) was grown in nutrient solution at uniform cadmium concentration of 20μ mol/L and 10 zinc concentrations (0, 1, 5, 10, 20, 100, 200, 500, 1000, 2000 μ mol/L). In Experiment 2, spring wheat seedlings,pre-cultivated in complete nutrient solution, were treated with 109Cd of uniform activity and the same series of Zn concentrations as those in Experiment 1 for 24 h. Cd concentrations in shoots and roots in Experiment 1 increased marginally but not consistently with Zn increasing at Zn rates of 1～200 μmol/L, and then decreased significantly at high rates (＞200 μ mol/L). In Experiment 2, the response of 109Cd activities in shoots and roots to increasing Zn was greatly similar to the response of Cd concentrations to Zn increasing in Experiment 1. The results of the two experiments indicated that the short-time and long-time exposure of spring wheat to Zn had similar effects on Cd accumulation. 相似文献
19.
In order to compensate for the limitation of conventional XY table used in semiconductor integrated circuits(IC) packaging and improve its speed and accuracy, a voice coil actuator (VCA) direct-drive high-speed and precision positioning XY table used in wire bonder was proposed. Also, a novel flexible decoupling mechanism was used in the positioning table, and the small moving mass enabled the positioning table to move at high speed and precision. XY table deformation interference caused by assembly error and instant interference generated by dynamic load moving with high speed and acceleration can be eliminated through the flexible decoupling mechanism. Considering the positioning table as lumped mass spring system,the dynamic equations of the mechanical system and the VCA were built according to the Newton mechanics principle and electromagnetic theory. Then the electromechanical coupling control model of the system was created through Laplace transform. Based on displacement PID controller, the loop-locked controlling algorithm of the positioning system was investigated. The dynamic control algorithm effectively improved the system dynamic performance. The precision test of the prototype machine was carried out, and the results validated the correctness of the model and the theory. Compared with traditional XY table, the table has higher speed, acceleration and positioning accuracy. 相似文献
20.
The idea of sports having seasons-like the football season-also comes from the natural rhythms of an agricultural society, where the timing of harvests and the general weather affected how people spent their time. Football is a boisterous sport still played in winter and early spring when the weather is cool and often wet. In the winter, bad weather kept people in doors and there was not so much work to do on 相似文献