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1.
Ren Yongdong 《科技信息》2007,(15):368-370
1. Introduction Interest, which is one of the important forces that guidestudents’action and performance, is undoubtedly considered asthe best teacher. It is widely believed that if a student isinterested in one course, he will be so eager and does hisutmost to learn it, and learn it well, no matter how manydifficulties he is encountering. On the contrary, if he lacksinterest in it, he may never have great success in study. Thisindicates that interest is one’s conscious tendency to explorin…  相似文献   

2.
情态动词should在虚拟语气句型中有时可以省略,有时不能省略,其用法常常使许多英语学习者感到困惑。将时态理解为“表示动作或状态与说话时刻关系的动作词语形式”,便于我们从全新角度认识现在时态、过去时态和祈使句式。在此基础上,作者从语义及句法结构两方面比较分析了should一词在两种虚拟语气句型中的不同用法,并且探究了该词的用法来源。  相似文献   

3.
Language and culture are closely related to each other.From the aspect of language as the semiotic system,language is the carrier of culture and culture is the entailment of language.The language of any nation bears the deep content of its culture.It can be said that language is the reflection of a nation's culture.Therefore the learning of a language must be connected with the acquisition of the corresponding culture.In the English classrooms English teacher should teach the language and the culture as well.This paper deals with both the cultural contents to be taught and the principles of teaching them in the English classrooms.  相似文献   

4.
冯涛  沈刚 《科技信息》2009,(34):I0120-I0120
Among students' abilities,the important one is the ability of studying independently.It is the teachers' indispensable task to foster students' ability of studying independently.This essay deals with the problem that how a teacher can foster the ability of student self-study,especially English study,from these perspectives:the nature,the characteristics,the conditions and the structure of the ability of independent study.The appropriate methods that the teacher should take in the process of fostering the ability are discussed in the last part of this essay.  相似文献   

5.
李娜 《科技信息》2012,(20):198-200,202
Recent years have seen a resurgence of interest in the role of grammar in English language teaching. Grammar teaching has become a preoccupation among more and more language researchers and teachers. This paper sets out to compare the views of grammar teaching in the Grammar-Translation, Audio-Lingual and Communicative Approaches from the following five points, the status of grammar teaching, the different methods in the instruction of grammar, the teacher’s role in grammar teaching, the characteristics of typical teaching activities in the three approaches with detailed examples and the effect of the three approaches to grammar teaching.It is concluded that grammar teaching should subscribe to an eclectic approach, that is, to take advantage of the strong points of each approach and avoid their weak points. Moreover, grammar teaching should be conducted according to the variables of learners and teaching circumstances.  相似文献   

6.
“He is anxious to teach”与“He is difficult to teach”中“be”的位置一致,但其论旨角色不同,“he”在前句中是施事,但在后句中是受事。乔姆斯基中的“标准理论”以及玻尔马特“非宾格动词假设”理论和“普遍联系假设”理论对此现象进行了阐释。其中玻尔马特之“非宾格动词假设”理论对此及其他相关现象更有解释力。  相似文献   

7.
王闻 《科技信息》2009,(14):131-133
The ideas of “Domestication” and “Foreignization” in Translation was put forward by the American scholar L. Venuti in 1995, indicating that there are two aspects involved in the process of translation. Of one is that a translation should get the readers closer to the author, while the other one is to get the author closer to the readers. The English translation of “Sun Zi: The Art of War” done by Lin Maosun is an outstanding example representing these two basic concepts in translation principles. It abounds with plenty of excellent examples demonstrating how domestication and foreignization can be achieved in the translation of Chinese classics.  相似文献   

8.
Experimental study of turbulence effect on re-aeration   总被引:2,自引:0,他引:2  
It is proposed that the oxygen fluxes caused by molecular and turbulent diffusion should be studied separately. Based on turbulent re-aeration experiments, a quantitative relationship between interfacial mass transfer coefficient and interfacial kinetic energy is developed. It not only simplifies the formula of re-aeration coefficient, but also gives fully consideration to the effect of interfacial kinetic energy on re-aeration. It is of great importance for predicting dissolved oxygen distribution and studying the effect of hydrodynamic characteristics on turbulent re-aeration processes.  相似文献   

9.
Applying the wavelet theory and methods to investigate the hydrologic processes such as precipitation and runoff is a hot field. However, several aspects in research are usually ignored: the effect of admissible condition of wavelet functions and the disturbance of noises for the detection of periods, the effect of the length of a hydrologic time-series on the final result, and the choice between the anomaly and the original time series for wavelet analysis. In this paper, these issues are fully discussed. Precipitation data from Lanzhou Precipitation Station are taken for case study. The result indicates that in the wavelet analysis of hydrologic series, denoise methods should be used to eliminate the influence of noises. The MexHat wavelet function satisfies the admissible condition, which ensures that the periodic properties of hydrologic processes can be well represented by using the MexHat wavelet for decomposition. The affected range of hydrologic series which should be discarded before analysis is given. It is also suggested that the anomaly series should be used to highlight the actual undulation of the hydrologic series.  相似文献   

10.
Applying the wavelet theory and methods to investigate the hydrologic processes such as precipitation and runoff is a hot field. However, several aspects in research are usually ignored: the effect of admissible condition of wavelet functions and the disturbance of noises for the detection of periods, the effect of the length of a hydrologic time-series on the final result, and the choice between the anomaly and the original time series for wavelet analysis. In this paper, these issues are fully discussed. Precipitation data from Lanzhou Precipitation Station are taken for case study. The result indicates that in the wavelet analysis of hydrologic series, denoise methods should be used to eliminate the influence of noises. The MexHat wavelet function satisfies the admissible condition, which ensures that the periodic properties of hydrologic processes can be well represented by using the MexHat wavelet for decomposition. The affected range of hydro-logic series which should be discarded before analysis is given. It is also suggested that the anomaly series should be used to highlight the actual undulation of the hydrologic series.  相似文献   

11.
It has long been assumed, and is even today by many, that sediment movement along the coast produced by wave action is uniform, even more so than along river channels. It will be shown that this can be far from the truth due to the interaction of storm and swell waves in their consecutive action on beach material. The hypotheses proposed have not yet been verified because measurements must be made in quick succession after a storm. However, plain observation of swift siliation and formation of sand spits and bars should make us wary of explanations which do not take such fluctuations into account. Inspite the pleth(?)a of f(?)mulae for littoral drift none can be applied with confidence outside the region from whence they were derived.  相似文献   

12.
Novel bulk ZnO porous nanosolids were prepared by a unique solvothermal hot-press method, using ZnO nanoparticles and several kinds of solvents as the starting materials. It was found from the experiments that ZnO nanoparticles underwent a “self-assembly process” under some specific hydrothermal hot-press conditions. As a result,some “nanoflowers” formed. The results showed that porous nanosolids with uniform pore diameters could be obtained when water distributed uniformly among the ZuO uauoparticles. On the contrary, if the uniformity of the distribution of water was poor, ““nanoflowers““ would appear in the water-rich region. It was also found that the photoluminescence of ZnO porous nanosolids was affected by the self-assembly phenomenon. In addition, the results also showed that, both the volume and diameters of the pores could be adjusted by changing either the hot-press temperature, pressure or the kinds of solvents.  相似文献   

13.
The dissymmetric flow phenomenon exists in a symmetric multistrand tundish. It was studied by the physical simulation experiment. The fundamental flow characteristic of dissymmetry was analyzed. The asymmetry of the flow field, the temperature field, and the inclusions distribution without flow-control devices (FCDs) were compared with those with FCDs. It is proved that the asymmetry of the flow and temperature field along the outlets at the long range is more obvious. The symmetric FCDs installation has a slight effect on the dissymmetric temperature field, simultaneously, the symmetry of the average residence time and the fluid flow pattern has improved, and the fluid flow in the tundish has been more reasonable. In case of a symmetric multistrand tundish having a large volume, the influence of the dissymmetric phenomenon should be considered and the flow behaviors in the whole tundish should be studied completely.  相似文献   

14.
Logic Reasoning     
A teacher was giving her pu- pils a lesson on logic(逻辑).“Here is the situation(情景),”she said,“a man is stand- ing up in a boat in the middle of a river,fishing.He loses his bal- ance(平衡),falls in,and begins splashing(泼水)and yelling(叫喊)for help.His wife hears the commotion(喧闹),knows that he can’t swim,and runs down to the bank (河岸).Why did she run to the bank?” A girl raised her hand and asked,“To draw out(提取)all of his savings(存款).”  相似文献   

15.
Although the traditional Chinese medicine (TCM) has developed a profound theory system and a fame of outstanding advantage in curative effect, it seems that the TCM is not quite adaptable to the deveiopment and requirement of the modern society. A principle of "Adopting the advanced part of Western medicine to serve the TCM" should be adhered to for the traditional Chinese medicine. First, TCM should strive for a consensus of TCM theory which focuses on the guiding principles of "diagnosis and treatment based on an overall analysis of the illness and the patient' s condition"and "the opposite principle of five internal organs". Among these principles, "keeping relative balance of three internal systems"is a valuable guidance of the diagnosis and treatment theory. Secondly, macroscopic should be integrated with microscopic, totality with parts, phenomenology with materialism. A dialectical law should be applied to guide analysis. In treatment, adjustment and balance are basic principles. It is necessary not only prepare the medicine in advance accoding to the predicted disease of the year, but also adopt methods to restrict disease in advance. Basides, TCM dose type should be ameliorated in order to meet the needs of society.  相似文献   

16.
Untraceable partially blind signature based on DLOG problem   总被引:1,自引:0,他引:1  
This paper proposes a new untraceable Partially Blind Signature scheme which is a cross between the traditional signature scheme and the blind signature scheme. In this proposed scheme, the message M that the signer signed can be divided into two parts. The first part can be known to the signer (like that in the traditional signature scheme) while the other part cannot be known to the signer (like that in the blind signature scheme). After having signed M, the signer cannot determine if he has made the signature of M except through the part that he knows. We draw ideas from Brands‘ “Restricted Blind Signature“ to solve the Untraceable Partially Blind Signature problem. Our scheme is a probabilistic signature scheme and the security of our Untraceable Partially Blind Signature scheme relies on the difficulty of computing discrete logarithm.  相似文献   

17.
The effect of deep cryogenic treatment on the mechanical properties of 80CrMo12 5 tool steel was investigated. Moreover, the effects of stabilization (holding at room temperature for some periods before deep cryogenic treatment) and tempering before deep cryogenic treatment were studied. The results show that deep cryogenic treatment can eliminate the retained austenite, making a better carbide distribution and a higher carbide amount. As a result, a remarkable improvement in wear resistance of cryogenically treated specimens is observed. Moreover, the ultimate tensile strength increases, and the toughness of the sample decreases. It is also found that both stabilization and tempering before deep cryogenic treatment decrease the wear resistance, hardness, and carbides homogeneity compared to the deep cryogenically treated samples. It is concluded that deep cryogenic treatment should be performed without any delay on samples after quenching to reach the highest wear resistance and hardness.  相似文献   

18.
Some Problems of Rails For High-speed Railway of China   总被引:1,自引:0,他引:1  
Acciording to running experience of high-speed railway abroad,a full attention must be paid to some requirements of specifica-tion of rails for high-speed railway,such as materil mechanical properties,rimension tolernces,straightness,surface flatness and so on.It is suggested that the long-length rails should be laid in high-speed railway,and the feasibility of producing,welding and transporting of long-length rails should be researched.On the basis of technical innovation of domestic manufacturers,it is practicable to lay 50-100mlong-length rails should be researched.On the basis of producing,welding and transporting of long-length homemade rails in high-speed railway of China.The following welding programme of rails for hiah-speed railway can be adiop-ted:50-100m long-lenath rails can be welded as 500m long rail string through flash butt welding in plant,then in field the reid string can be welded through a mobile flash butt welding or thermit welding.As the specification of rails or high-seed railway is rigorous.some related techniques to long-length rails should be researched and practised as soon as possible,including mobile flash butt welding tech-nique,transporting and reinforcing techniques of lon-length rails,etc…  相似文献   

19.
One of the most remarkable characteristics of debris flow is the competence for supporting boulders on the surface of flow,which strongly suggests that there should be some structure in the fluid body. This paper analyzed the grain compositions from various samples of debris flows and then revealed the fractal structure. Specifically,the fractality holds in three domains that can be respectively identified as the slurry,matrix,and the coarse content. Furthermore,the matrix fractal,which distinguishes debris flow from other kinds of flows,involves a hierarchical structure in the sense that it might contain ever increasing grains while the total range of grain size increases. It provides a possible mechanism for the boulder suspension.  相似文献   

20.
During the construction of the south caisson anchorage of Taizhou Bridge, the drainage area is located in the lower reaches of the Yangtze River and the permeability of stratums there is considerable. In order to maintain progress and guarantee safety during the sinking of the caisson, water should be drained in the initial period. Subsequently, detailed information about the aquifer permeability is required to make sure that the drainage will proceed successfully, which consequently necessitates the on-site estimation of the aquifer permeability in the drainage area. Therefore, the traditional pumping test and slug test are implemented respectively on site. The comparison of computational results of these two tests indicates that they are consistent overall. Notwithstanding, as slug test can be conducted with portable facilities in a short time and the manipulation is easy and few people need to be involved, the advantages of slug test is conspicuous compared with the traditional pumping test. It could be speculated that slug test will gain a prevalent application in the measurement of aquifer permeability in the future.  相似文献   

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