Unit commitment is an important aspect of optimal operation of power systems . Since it could mean significant annual financial savings in power generating cost it continues to be the main optimization task in everyday power generation schedule .

机组组合是电力系统优化 运行的一个重要方面，由于它能带来显著的经济 效益，所以一直是现代电力系统每天运行计划主要的优化任务。

The hydrogen purification unit has the characteristics of elastic operation low maintenance cost and stable performance .

结果认为，膜分离器与脱硫 装置 的 组合工艺适合于加氢尾气提纯，该 装置具有 操作弹性大、维护 费用低、性能稳定可靠的特点。

Detailed information on unit operation design maintenance and cost factors is addressed in later chapters .

关于 单元 操作的设计、维护以及 费用等因素的详细信息在后面章节说明。

Tunnel lighting is also the greatest energy consumption unit in tunnels . On the premise of security how to optimize design for tunnel lighting system and reduce energy consumption to the most extent and save operation cost has important realistic significance .

隧道照明是隧道内能耗最高的用电 设施，在确保行车安全的前提下，对隧道照明系统进行优化设计，最大程度的降低隧道照明的能耗，节约 运营 成本，具有重要的现实意义。

Chain operation has two effects on the scale economy . On one hand it can bring down unit sale cost and unit operation cost .

对零售企业来说，通过连锁经营的形式尽快扩大企业的经营规模，实现规模经济，是提升零售企业市场竞争力最现实的选择，一方面降低 单位销售成本和 经营 成本，提高利润率；

The unit is automatically controlled by PLC and has many advantages including easy operation low cost high growth rate and coating quality and high technological reproducibility .

全部控制及工艺 流程采用PLC（可编程 控制器）自动控制，具有 成本低、效率高、膜系质量优、工艺可重复性好等特点。

As for petroleum enterprise to predict oil unit operation cost accurately can decrease cost and increase enterprise benefit by means of effective control measures .

对石油企业而言，准确的预测原油 单位 操作 成本，可以在 生产过程中采取有效的手段控制，降低成本，提高企业效益。

Through the secondary retrofit of the desalinated water treatment unit the acid and alkali consumption for the regeneration of the desalinated water is reduced the quality of the water is stabilized and improved and the operation cost is lowered .

通过对脱盐水处理 装置的2次改造，降低了脱盐水再生用的酸碱消耗，稳定和改善了脱盐水的水质，节约了 操作 费用。

Taking the renovation project of an office building for example this paper compares the characteristics of aircooling heat pump unit and water source heat pump unit initial investment of refrigeration and heating equipment engineering and operation cost of refrigeration and heating .

本文以北京某办公楼改造为实例，从风冷热泵机组与水源热泵 机组的特点、制冷供热设备工程初投资以及制冷供暖 运行 费用等方面对两种方案进行了比较。

Reactive precipitation is an important and common unit operation in the field of chemical engineering and has been widely used for producing solid particles of high purity from a liquid phase at low cost .

反应沉淀法广泛应用于从液相中低成 本地 生产高纯度的固体颗粒产品。

In this paper a few problems in the development of low head energy using through flow turbine unit are discussed e.g. unit efficiency operation management turbine cost and hydropower buildings and suggestions for improvement are made .

本文就江西省使用贯流式机组遇到的几个问题，如 机组效率、 操作 运行管理、水轮机 造价、水工建筑物等方面作了分析，并对机组的改进提出了建议。

Controlling oil unit operation cost is a mainly method for petroleum enterprise to conduct cost budgeting and controlling .

原油 单位 操作 成本控制是石油企业进行成本预算与控制的主要手段。

Secondly the article conducts key research on the general power plant optimization and single unit optimization to increase the generation company operation optimization level and proposes optimization model of power plants operation based on integrated analysis of thermal efficiency which effectively reduces coal cost of generation .

第二，为提高发电厂 运行优化水平，从总体优化和各 单机优化两个层面进行了重点研究，提出基于综合热效分析的汽轮机组运行优化模型，有效降低了发电 煤耗。

An electronic control unit ( ECU )( 24 ) performs drive power control operation by using electric power generation cost and electric assist cost .

电子控制 单元（ECU）（24）会通过利用发电机 功耗和辅助电功耗执行驾驶功率控制的 操作。

The unit operation cost of the apparatus for water purification decreased from 2.575RMB/m3 to 0.717RMB / m3 when its scale of treatment increased from 10m3 / d to 50m3 / d.

当该净水装置处理规模由10m3/d增大到50m3/d时，其 单位 运行 费用由2.575元/m3减小到0.717元/m3。

The actual total costs and unit costs of logistics cost object in all sectors of the logistics operation can be calculated by collection and distribution of logistics cost though activity cost item .

在此基础上，引入 作业成本计算和分析方法，按作业成本项目，通过将四川烟草商业企业物流 费用进行归集与分配，从而计算出各环节物流 作业成本计算对象的实际总费用和 单位费用。

The oil suction unit has the advantages of simple structure quickly suction and discharge convenient operation and low cost .

本吸油 器的优点是结构简单，排吸快，使用 方便， 成本低。