最大变化

The method of setting up an affine coordinates system to solve the problems for the spatial crank and rocker mechanism is proposed.

分析并回顾了在给定摇杆两个极限位置及行程速度变化系数的情况下，最小传动角为最大的平面曲柄摇杆机构和空间曲柄摇杆机构的设计问题。

The results show that all these three factors are helpful to increase the alcoholysis degree,but the influence from the amount of alkali contributes the greatest,and the influence from the reaction temperature is the least.

结果表明，三种参数的增加都会使产物的醇解度增加，其中碱物质的量比的影响最大，其次是反应时间，反应温度对产物醇解度的影响最小，几种参数对醇解反应的影响是交互的，当其中一种参数发生变化时，其它几种参数的影响能力会随之发生改变。

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。

During vertical migration , the copepod is assumed to instantaneously check the variations of the environmental parameters and can thereby make the optimal behavioral strategy to maximize the value of venturous revenue , i .

在垂直迁移的过程中，我们假设桡足类个体能够即时识别环境参数的变化从而采取最优的行为策略以获取风险收益的最大值，即以尽可能小的死亡代价获取尽可能多的食物。

Due to orbital dynamics, the obliquity varies between a minimum of 21 degs.

由於轨道动力学，倾斜度在最小值21度39分和最大值24度36分之间变化。

Due to orbital dynamics, the obliquity varies between a minimum of 21 degs. 39 mins. and a maximum of 24 degs.

由于轨道动力学，倾斜度在最小值21度39分和最大值24度36分之间变化。

Because it is necessary for wind speed estimation to consider the variation of air density, a method to implement air density estimation by discrete sampling of the state of DFIG is proposed.

准确的风速估计必须考虑空气密度的变化，给出通过对风机状态的离散采样实现空气密度估计的方法，利用修正后的空气密度对风速进行更为准确的估计，从而得到最优的转速设定，实现风能的最大捕获。

Modern logistics high integrated industry, it refers many fields, we must correspond well, plan reasonably, and control the whole commodity course, so we can achieve the most profit and the least cost. We also satisfy the consumer needs, offer colligation service, conformity resource and disport reasonably, and advance economy circulation quality, improve city environment, drive development of the national economy. There is very important meaning to realize the strategy of sustainable development.

现代物流产业是一个高度集成的行业，涉及众多领域，所以必须通过统筹协调、合理规划，控制整个商品的流动，以达到利益最大或成本最小，同时满足用户需求不断变化的客观要求，提供综合性的服务，整合资源和合理配置，提高经济运行质量，改善城市环境，推动国民经济持续良性发展，这对实现可持续发展战略具有十分重要的意义。

According to Professor Dunstan, this has as much to do with the fact that television is the most popular form of leisure as it does that our general lifestyles have changed.

根据大卫·邓斯坦教授教授的研究，我们的基本生活体系已经发生了很大变化，看电视已经成为最普遍的的休闲方式。

Most organisms live near the surface, PVC VALVE PVC window where the greatest pH change would be expected to occur, but deep-ocean lifeforms may be more sensitive to pH changes.

大多数生物生活在海洋表面，而海洋表面正是pH值预期变化最大的地方，但是深海生物可能对pH值的变化更加敏感。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。