Therefore, in order to save energy and cost, the optimization of enterprise energy system is very important. Enterprise energy optimization problem has become the research hotspot in multi-objective optimization problems. 因此，对企业能源系统进行优化以达到节约能源及成本的目的是十分重要的，企业能源优化问题已经成为多目标规划问题的研究热点。
In the article, detailed study of some crucial factors concerning demands forecast, schemes comparison, major device performance and energy cost for design and optimization is carried on. 因此，文章对分布式冷热电联产系统的设计与优化进行深入的研究，对负荷预测，方案确定，设备性能，能源价格等对系统实际运行后的成败与否起决定性的因素进行了分析。
Approaches the selection of air pretreatment process and the selection of air purification equipment and filtering media and equipment in order to realize the optimum integration of process and engineering design in non bacterium air production from the viewpoint of energy saving, cost reducing and process optimization. 从节能、降低成本、优化工艺的角度，对无菌空气制备过程中，空气预处理流程的选择、空气净化设备、过滤介质以及设备的遴选进行探讨，以实现工艺和工程设计的优化结合。
Selection of air conditioning heat and cold sources of a building are illustrated. On the basis of selection, energy consuming, life cycle cost and payback period of investment, system gray optimization method are used to decide the best scheme of heat and cold sources. 以某大厦的空调冷热源为例，通过选型、能耗经济性能分析、寿命周期成本和投资回收期的计算，运用系统灰色优化方法，从而获得较优的冷热源设备方案。
By using the Energy State Approximation method, the optimization method of cost function according to minimum direct operate cost is derived, and the corresponding calculation methods of optimization trajectory of vertical flight profiles for climb, cruise and descent phase are obtained. 使用能量状态近似法对以最小直接运营成本（DOC）为性能指标的优化方法进行了推导，得到飞机纵向飞行剖面&爬升、巡航、下降段的最优轨迹的分段计算方法。
