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class an
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  “class an”译为未确定词的双语例句
     Therefore, it is significant to explore and practice in information technology class an "autonomous, cooperative and innovative-exploratory" instructional model which accommodates the characteristics of information technology classes.
     在“自主、合作与创新探究”信息技术课堂教学模式构建中,着重分析了自主学习,合作学习以及创新探究学习以及三种学习方式的关系和有机结合的优点。
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     Owing to general fuzzy min-max (GFMM) neural network, which is incapable of automatically learning from any new pattern class, an unsupervised improved arithmetic is proposed.
     针对 General Fuzzy Min- Max(GFMM)神经网络不能自适应学习新类的缺陷 ,提出了一种基于该网络的无师训练改进算法。
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     Open Composition Class:An Exploration of Composition Teaching
     开放作文课堂教学初探
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     Class is the most important conception in the object-oriented programming. After improving the structure of the class , an agent model which can be calculated is proposed.
     类是面向对象技术中最重要的概念,改进类的结构后给出了一种可计算的agent模型.
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     The application of these self designed activities reveals two advantages of applying computer in an English writing class: an easy involvement of the students in writing and an easy procession of teaching English writing.
     并指出计算机辅助英语写作教学的两个优势 :学生更容易投入写作精力 ,教师更容易讲解写作过程。
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     On Observation of an Arresting Class
     试论看查缉课
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     An K - R.
     介 绍K-R.
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     An.
     An.
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     An Estimation on the Functions in Class S
     关于S族函数的一个估计
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  class an
Up to derived equivalence, the representation-finite self-injective algebras of class An are divided into the wreath-like algebras (containing all Brauer tree algebras) and the M?bius algebras.
      
Twisted Bimodules and Hochschild Cohomology for Self-injective Algebras of Class An, II
      
This allows us to associate to every equivalence class an infinite family of graphs and determine their topological properties.
      
For convenience we call each structure of this new class an almost C-structure, and a manifold with an almost C-structure an almost C-manifold.
      
In the first class an oval consists of the points of a conic together with its nucleus.
      
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This paper reviews the developmental history of seismic stations and evaluates the detection capability of the present network of seismic stations in China. Similar results are obtained by the three methods proposed for the evaluation of detection capability,namely. ( 1 ) Estimation of the effective radius of observation; ( 2 ) Examination by means of the b-value; and ( 3 ) Examination by the method of areal seismicity. Our examinations show that the present network can detect the earthquakes of magnitude above...

This paper reviews the developmental history of seismic stations and evaluates the detection capability of the present network of seismic stations in China. Similar results are obtained by the three methods proposed for the evaluation of detection capability,namely. ( 1 ) Estimation of the effective radius of observation; ( 2 ) Examination by means of the b-value; and ( 3 ) Examination by the method of areal seismicity. Our examinations show that the present network can detect the earthquakes of magnitude above 4.5 occurring throughout China and of magnitude above 4.0 occur-ring in a greater past of China. In eastern China whese the station density is higher,the detection capability is greater so that the earthquakes above 2.0 or 3.0 east of longitude 100?E can be detected.In this paper,the observation errors and their causes are also discussed. Analysis shows that the observation precission of the present network of seismic stations is not high,and that the uncertainty in the time service of "Class A Stations" is as much as±0.3 sec. Finally,suggestions are made for improving the observation capability through better distribution of seismic stations.

本文简略地回顾了中国地震台站的发展进程,对目前地震台网的实际监测能力进行了检验,并提出三项检验台网监测效能的方法,即(1)有效观测范围的估算,(2)b值检验和(3)地震活动面积的检验。经过检验表明,现有台网可以基本监测全国范围内4.5级和绝大部分地区4.0级以上的地震活动;东部地区的台站较多,其监测能力也较强,可观测到东经100°以东大部分地区的2.0级或3.0级以上的地震。 文中对地震台网的观测误差及其引起的原因进行了讨论。经分析后认为目前我国区域地震台网观测精度不高,甲类台站的时间服务才达到±0.3秒左右。最后,还对提高中国地震台网的监测效能和改善台网的布局提出了一些建议。

It can be seen by experiment that the operating conditions of two power transistors in Totem-pole output stage are different from each other. When one is of Class B the other must be of asymmetrical Class A. By an analysis of the circuit operating conditions, an important formula for its proper design is derived and ways to improve efficiency are proposed.

本文在实验的基础上,指出Totem-Pole功率放大器两个功率管的工作状态是不相同的.其中一个功率管工作在B类,另一个必须工作在非对称的A类.通过对这种电路的工作状态进行分析,提出了正确设计的重要公式和提高效率的方法.

This research attempts to find out the different effects of programmedinstruction and traditional instruction on students' achievement, learningtime, thinking ability and learning motivation. The experiment was carriedout in two first-year classes (an experimental class and a control one) ina middle school, both of which were taught rational number in theiralgebraic course, and by the same teacher. The average level of the twoclasses was approximately equal in the beginning. The experimental classbegan...

This research attempts to find out the different effects of programmedinstruction and traditional instruction on students' achievement, learningtime, thinking ability and learning motivation. The experiment was carriedout in two first-year classes (an experimental class and a control one) ina middle school, both of which were taught rational number in theiralgebraic course, and by the same teacher. The average level of the twoclasses was approximately equal in the beginning. The experimental classbegan to use a programmed teaching material compiled by ourselves forabout a month, during which both classes were tested a few times and theirmarks compared. The results showed that the experimental class madeobviously better progress in all aspects than the control class. These resultsare probably related to the heuristic characteristics of programmed materials.Programmed instruction still needs further research.

本研究对程序教学与传统教学的效果作了对比。研究表明,程序教学可以缩短学习时间、提高学习效果、激发学习动机,有助于自学能力的培养。如果程序教材能够符合学生的认识规律,在教材中尽量增加启发因素,那么程序教学对于思惟能力的培养也可以起到积极的作用。

 
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