决定因素

Researches show that the drive force characteristics of the electric tractor drive system based on series DC motor is close the ideal characteristics, the curves are concave, low speed with constant power, and high speed with constant torque; the electric tractor has large working speed under different shifts, but the extensive coincidence speed shows that the variable ratio of the gear is unreasonable; the maximum climbable gradient of this electric tractor is more than 30%, and does not need frequent shift when working for its extensive climbable gradient; there are many influence factors of continuous working time, which the more obvious factors are working speed and working load, the working time increases with the increase of the working speed and working load.2. Simulation researches on the drive characteristic of the electric tractor.

研究结果表明：基于串励直流电动机(来源：ABC21论文网www.abclunwen.com)的电动拖拉机电驱动系统的驱动力特性场接近理想驱动力特性场，其各挡下的驱动力特性是一组下凹的曲线，低速恒转矩，高速恒功率；同一行驶速度下所对应高挡驱动力大于低挡驱动力，这是由电机的调速特性决定的；电动拖拉机各个挡位下具有较广的稳定作业速度范围，但是各个挡位之间速度重合的范围较多，说明所用变速箱变速比与电动机匹配不合理；电动拖拉机最大爬坡度达到30%以上，并且各挡爬坡度变化范围较广，作业过程中不需要频繁换挡；影响电动拖拉机连续作业时间的因素较多，其中作业行驶速度和作业负荷影响最为明显，作业负荷越大，连续作业时间就越短，作业速度越快，连续作业时间就越短。2、电动拖拉机驱动特性仿真研究。

Statistic analysis result shows that the time step is the most important influence factor of simulation precision, and there is relation between simulation error and the setup value of restitution coefficient which the greater the setup value is, the less the simulation error is. Although there is no effect to the total contact time in the course of collision, the value of the time step decides the total contact step, and there is a logarithmic linear correlativity between them.

统计分析结果表明：计算时步是影响模拟精度最重要的因素；模拟误差还同恢复系数的设定值有关，设定值越大，模拟误差就越小；计算时步的大小虽然对碰撞过程的总接触时间影响不大，但是却决定了碰撞过程的总接触时步数，二者之间存在对数线性相关关系

That was the nail in the coffin.

那是决定成败的最重要的因素。

We must be aware of the relationship between the politics education and innovation, and strengthen the efficiency of politics education in order to enhance the collegian's quality of innovation.

科技创新能力已成为决定一个国家在国际竞争和世界格局中的地位的重要因素。

The main factors to determine the best color palette are the colors of the skin, eyes and hair.

决定人气色的主要因素有皮肤的颜色，眼睛的颜色和头发的颜色。

Package design for children's commodities could be innovated through effective representing methods of colorization, cartoonization, and visualization.

因此，儿童用品包装色彩的良好设计不仅提高了儿童商品的附加值，也成为决定儿童商品在市场销售的诱饵和竞争力的重要因素之一。

Their fate will be decided in the marketplace, where other factors will come into play.

他们的命运是有市场来决定的，其他因素也会在这之中起作用。

Their approach is not the common factor that determines their success.

他们的方法并不是决定他们成功的普遍因素。

Since we can not completive with the western developed countries in the high-end market of the hotel industry, the Low-and-middle market of the hotel industry will become one Primary position of our national hotel industry.

而核心竞争力是决定酒店核心竞争力的主要因素，是酒店强于竞争者的特定优势，更是组成酒店发展战略的核心，要求得持久的生存与发展，就必须培育自己的核心竞争力。

The minimum headway, which determines the maximum frequency of TUs on the line, is by far the most complex element influencing line capacity.

两车之间的最小时距，它决定了交通线上TUs的最大频率，是至今影响交通容量的最复杂的因素。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。