任务单

A single machine scheduling problem with batchs setup time depending on sequence is proposed. The math model to minimize setup times is upbuilt. An improved adaptive hybrid genetic algorithm is brought up for solving this scheduling problem. Several operators are redesigned according to the characteristic of this scheduling problem. Follow job optimization recombination crossover is advanced for transmitting the good character to the offspring. To improve the mountain climbing ability of the genetic algorithm, the mutation is replaced by a local optimization algorithm.

提出了一种具有序依赖setup time的单机器批量生产调度问题，以总的setup time最小为目标建立了该生产调度问题的数学模型，设计了一种改进的自适应混合遗传算法求解该生产调度问题，对遗传算法的交叉和变异算子均按照该调度问题的特点进行了改进，提出一种&紧后任务选优重组交叉算子&，该算子能将调度排序上的优良性状很好地遗传到下一代群体中。

Fifth Rate Fifth Rate Frigates are single-deck warships, used for a variety of tasks thanks to a combination of good handling, firepower and endurance at sea.

五级舰护卫舰是一种单甲板战舰。得益于良好的火力，机动性和续航力的完美结合，它可以承担多种任务：追击，护航，拦截商船和侦查。

This paper emphasizes on the production system of SMT, studying the single process of the parallel-machines, mix the total completed time of the short-termed production scheduling, achieving higher utilization of machines.

论文以PCBA制造业中SMT工段生产系统为主要研究对象，研究了单制程平行机台条件下，以最小化任务完成时间为目标的短期排程问题，以实现按时交货，并提高机器利用率。

I believe the ability to single-task (as opposed to multi-task) is one of the keys to true productivity.

我认为单任务的能力是实现真正的工作效率的关键之一。

At present, electric propulsion technology has been widely applied in space flight missions and ascendant performance of electric thrusters makes them a substitution of traditional chemical propulsion system like monopropellant and bipropellant motors gradually.

中文题名电弧喷射推力器数值模拟与实验研究副题名外文题名 Numerical simulation and experimental study on arcjet thrusters 论文作者汤海滨导师刘宇教授学科专业航空宇航推进理论与工程研究领域\研究方向学位级别博士学位授予单位北京航空航天大学学位授予日期2002 论文页码总数134页关键词电弧喷射推力器火箭发动机电推进推力器馆藏号BSLW /2002 /V439 /3 目前，电推进装置已广泛地用于空间飞行任务，优越的性能使其正在逐步取代单、双组元等传统的化学推进系统。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。