查询词典 contact rail

It is concluded in Chapter Eight that: 1 linguistic proficiencies in three languages play a considerable part in code-switching of EFL teachers in trilingual context; the inter-sentential switching outweighs the intra-sentential switching both in frequencies and percentage; discourse-related switching also outweighs participant-related switching in frequencies and percentage; the EFL is maintained longest in EFL classroom and the language maintained second longest depends upon learners" higher proficiency in Chinese or Tibetan. 2 Ethnic identity and educational background is the major causal factor of EFL teachers" Chinese-English switching in trilingual classroom; duration of language contact and relative trilingual proficiencies are the two principal contributors to the English-Tibetan switching; while Tibetan-English switching is mainly driven by EFL teachers" ethnic identity and education background, as well as the duration of language contact; English-Chinese switching is also largely motivated by the duration of trilingual contact; and Chinese-Tibetan switching is determined by trilingual proficiency to a considerable extent. Meanwhile, psychologically, the switching is mainly motivated by a procedure of psychological projection, trilingual system conceptualization and the mentality of trilingual selection. 3 The educational reflections upon this study indicate: firstly, in trilingual context, the teachers" classroom discourse is characterized by the multilingual involvement, flexibility in strategy option as well as the extension and strengthening of the domination of teachers" discourse. Secondly, the discourse movement and code-switching are largely affected by two cultural ecological mechanisms: enculturation and cultural manipulation. Thirdly, the status quo of EFL trilingual teachers are characterized by unbalanced trilingual proficiencies, poor cultural awareness, and little knowledge of trilingual education and trilingual code-switching, therefore, suggestions are advanced in the end to provide them further education. Fourthly, in trilingual context, the EFL curriculum for ethnic minorities is characterized by plurality of aims, complexity of organization and variety of resources. Meanwhile, it is of great necessity to understand the linguistic values of EFL education for ethnic minority learners. To be specific, firstly, we should not only have a deep understanding of the distribution, construction, function as well as communicative effects of the three languages, but also have a comparative study of the three languages and thus provide the standardization and guidance for the trilingual education. In the end, it is advanced that trilingual EFL provision for ethnic minority should pursue to develop learners" multicultural value system in which first language culture and mother language culture take the central position and EFL culture plays a vital role.

3在三语环境下，教师课堂话语具有话语形态多元化、话语选择策略具有灵活性和教师话语权得到延伸和拓展等特征；文化涵化和文化操控是影响三语教师课堂语码转换的两种文化生态机制；参差不齐的三语水平、淡薄的多元文化意识和对三语教学和语码转换缺乏科学认识是我国目前三语师资的主要特点，因此应对三语教师进行职后继续教育；在三语环境下，民族外语课程具有课程目标多元化、课程组织复杂化和课程资源多样化等特点；应对民族外语教育的语言价值进行审视和解读，对三种语言在课堂话语中的分布趋势、结构特征、功能作用和交际效果等问题进行深入研究，加强对三种语言间的对比分析研究，同时对民族外语教育中的三语教学进行规范和指导；在强调民族文化和二语文化在三语文化格局中心地位和外语文化的重要作用的同时，民族地区的外语教育应以构建多元文化价值观为其文化追求。

A piece of permanent magnetic steel is fixed on the electric contact signaling needle of the electric contact device, so as to reinforce the magnetism of the contactor and speed up the contact action.

同时指针带动电接点装置的活动触点与设定指针上的触头相接触的瞬时，致使控制系统接通或断开电路，以达到自动控制和发信报警的目的。

As the memory of the memory slots in the ordinary point of contact is very thin wire, the conventional means of hard to play, brought a sweater with a crochet hook (the kind of hard又尖又), with the smallest end of the tip of the ordinary memory contact wire is a hook pressure is through the efforts of, the basic memory slot Goldfinger will wire into contact with it in the slot, and then the question of the film installed on the motherboard CPU, board and connection, plug the memory, boot "toot" out of the clear voice of the machine light and smooth access to Win98, the main board again,"induction" of the.

由于内存插槽中的内存金手指接触点金属丝很细，常规手段难以施展，找来勾毛衣用的钩针，用最细最尖的一端，对内存金手指接触丝又是压又是勾，经过努力，基本将插槽的内存金手指接触丝挤进了它所在缝隙中，然后将这片问题主板装上CPU、板卡和连线，插内存，开机，&嘟&的一声清脆的声音，机器点亮，顺利进入Win98，主板又重新&上岗&了。

As the memory of the memory slots in the ordinary point of contact is very thin wire, the conventional means of hard to play, brought a sweater with a crochet hook (the kind of hard又尖又), with the smallest end of the tip of the ordinary memory contact wire is a hook pressure is through the efforts of, the basic memory slot Goldfinger will wire into contact with it in the slot, and then the question of the film installed on the motherboard CPU, board and connection, plug the memory, boot "toot" out of the clear voice of the machine light and smoothly into the operating system, the computer again,"induction" of the.

由于内存插槽中的内存金手指接触点金属丝很细，常规手段难以施展，找来勾毛衣用的钩针，用最细最尖的一端，对内存金手指接触丝又是压又是勾，经过努力，基本将插槽的内存金手指接触丝挤进了它所在缝隙中，然后将这片问题主板装上CPU、板卡和连线，插内存，开机，&嘟&的一声清脆的声音，机器点亮，顺利进入了操作系统，电脑又重新&上岗&了。

Laid method:contact and non contact.Non contact laid means the distance between the laying cable is more than 2 times of cable O.D.

布线方式分为接触与非接触两种，其中非接触指电缆间的相互距离大于二倍的电缆外径。

There is no mechanical contact, Chuan-power are generated in the air gap, except there is no other rail friction

1没有机械接触，传动力是在气隙中产生的，除了导轨外没有其它摩擦

Numerical method is used to investigate the bogie's ateral stability under diverse nonlinear factors. The influence of nonlinearities and conicity on the critical speed is investigated. The nonlinear forces considered in the bogie system include creep-force between the rail and wheel, longitudinal damping and the flange contact force.

利用数值方法研究了不同非线性力作用下转向架的横向稳定性，得到轮轨饱和力、蠕滑力、纵、横向阻尼力、轮缘死区接触力、踏面斜率以及轮轨间隙对转向架系统线性、非线性临界速度的影响规律。

With the development of the high speed and heavy haul railway, rail contact default such as corrugation and peeling off occur more and more.

随着铁路高速重载趋势的发展，钢轨的波形磨耗和因接触疲劳而产生片状剥落、开裂等病害呈上升趋势。

Wheel/rail friction,rolling contact,temperature,creepage,finite element method

中文关键词：轮轨摩擦；滚动接触；温度；蠕滑率；有限元

Fining pearlite, therefore, is one of the most effective method to further improve the contact fatigue properties of PD3 rail steel.

因此，细化珠光体是进一步提高接触疲劳抗力的有效途径。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。