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Based on the working condition of the tractor, a new type of electric tractor drive system which combines a motor and a gear, and the evaluation index and the calculation method for dynamic performance of electric tractor are suggested; taking an electric tractor drive system as design object, the balance graph of drive-resistance force, climbable gradient under different shifts, and continuous working time are calculation analyzed.

根据电动拖拉机作业特点，提出了一种电动机和变速箱相结合的电动拖拉机传动系统结构方案，并给出了电动拖拉机动力性能和经济性能评价指标以及电驱动系统主要参数的设计计算方法，以基于串励直流电动机的某型号小四轮电动拖拉机电驱动系统为设计实例，计算分析了该电动拖拉机的驱动力-行驶阻力平衡图、不同挡位下的爬坡度以及连续作业时间。

It is based on standard working hours, to a certain period of the cycle, the time together system of working hours.

它是以标准工作时间为基础，以一定的期限为周期，综合计算工作时间的工时制度。

To study the characteristics of Micro hotplate based vaccum sensor at constant tern perature working mode, the influences of working temperature and dimensions on the working characteristics of MHP based thermal vacuum sensor at constant temperature was analyzed based on the thermal analysis of MHP.

研究了微热板的传热特性，从理论上分析了恒温模式下工作温度和结构尺寸对微热板电阻真空传感器工作特性的影响。

Studies on basic working principles and designs of fiber lasersThe basic working principles as well as the major characteristics of laser and fiber lasers are firstly reviewed,including the interaction between light and matter, the laser oscillation conditions and the spectrum distribution,the gain characteristic and spatial hole burning effect,the influence of external environment on the stability of laser output and the actual limits of fiber laser bandwidth;The designs of bidirectional single-mode Er-doped fiber ring laser and multi-wavelength laser is then discussed,respectively;The characteristics of dynamic grating reflection spectrum of the fiber saturable absorber is systematically analyzed.?

在激光型光纤传感器的设计、实验现象的理论解释等方面做了如下的研究工作：光纤激光器的基本原理与设计方案概述了激光和光纤激光器的基本原理，包括光与物质的相互作用，激光振荡的条件及频谱分布等激光产生的基本原理：掺铒光纤的增益性质，空间烧孔效应和外界扰动对激光输出稳定性的影响，光纤激光器的实际极限带宽等光纤激光器的相关知识；分别讨论了双向单纵模环形腔激光器和多波长激光器的设计方案；系统地分析了掺杂光纤饱和吸收体中形成的动态光栅的反射谱特性。

In addition, the working principle of the instrument for measuring spherical curvature is described, and the scheme of structure base on this working principle is designed, and then the accuracy analysis of it is proved in details.

文中详细阐述了可变径球面曲率测量仪器的工作原理、系统选型、结构设计，并详细对测量仪器进行了精度分析及精度综合，指出了影响仪器测量精度的重要因素。

According to the threedimensional coordinates of any point on the working face measured by total station, CASIO measurement program can exactly work out the overbreak and underbreak volume of any point on the working face.

采用普通全站仪，可以测得隧道掌子面上任意点的三维坐标，然后通过手持CASIO计算器测量程序计算，即可精确算得此点相对该里程设计断面的超欠挖值。

Finally the instance of the quality control of the axis besmearing working procedure is analyzed, which shows that the quality loss is decreased based on the working procedure power assured with the quality control approach, the aim of the forecasting control is achieved, and the competing capability of the enterprise is increased.

最后通过轴涂敷工序的质量控制进行了实例分析，表明该控制方法能在保证工序能力的基础上减少质量损失，达到预测控制的目的，提高了企业竞争力。

On the basis of the mechanism research of nozzle spraying, the measurement of the particle size of droplet which produced by nozzle atomization, the dust examination on the working face and the simulation of dust along the whole working face, the author puts forward a optimized dust-laying system of support spraying, and it has obtained a good dust-laying effect dust-laying work.

由于综放工作面的产尘量较采用其它生产工艺的采煤工作面的产尘量要大，因此，从保护现场作业人员职业安全健康以及企业安全生产的角度考虑，必须将综放工作面的粉尘浓度控制在可容许的范围以内。

Bruce Springsteen's new album Working on a Dream has been set for a January 27 release on Columbia Records. Working on a Dream was recorded with the E Street Band and features twelve new Springsteen compositions plus two bonus tracks. It is the fourth collaboration between Springsteen and Brendan O'Brien, who produced and mixed the album.

专辑介绍：去年，在美国总统大选中公开支持奥巴马的Bruce Springsteen就用《Working on a Dream》这首歌作为了奥巴马竞选宣传的号角，这首歌与奥巴马所宣扬的关于&改变&的梦想相当之契合，而当奥巴马正式进驻白宫之后，被乐迷亲切成为&老板&的Bruce Springsteen的这第十六张录音室专辑也以&Working on a Dream&这个名字出炉了。

Apart from the working limitations resulting from its structural property, the flat plate heat pipe carries out heat dissipation through the evaporation and condensation of the working fluid. Thus, if the working angle of the fluid is adverse to its backflow, the heat pipe will fail easily. Furthermore, not the orientations of all the heat sources are favorable to the functioning of the heat pipe. To compensate for this drawback, this research focuses primarily on the development of a composite structure which will reduce the effect of gravity on the working fluid. Generally speaking, the heat pipe is divided into three main categories: the groove type, sintered metal type and mesh screen type, as shown in Table 2. As far as capillary force is concerned, the sintered metal type and mesh screen type show better performance. As mentioned in R.

平板式热管除了因其结构特性而产生的工作极限之外，由于其作用乃是透过工作流体的蒸发及凝结进行散热，故若是其工作角度不利于液体之回流，便容易使热管失效，且并非所有之发热源都是位于有利于热管工作之位置，因此本研究之主要目的为设计一可减少重力对工作流体影响之复合式结构；一般而言，热管之结构大致可分为沟槽、烧结及网格三种(如表2所示)，其中烧结及网格结构有较佳之毛细力，在 R。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。