利弊

This dissertation fistly introduces appearance, definition, development process, functions and status of MES, also analyses methods and existent problems of MES production scheduling; as follow, in the background of CY_MES (a enterprise's Manufacturing Execution System), introduces main function and buildup of its support platform– SIMATIC IT, and whole structure of CY_MES; afterwards, for special production instance of the enterprise, designs production scheduling system software structure, function structure, data structure of order and entry and realization of silk production and packing production scheduling based on SIMATIC IT; finally, after contrast of many modeling methods and careful research of silk production flow of the enterprise, selects Petri net to model the silk production scheduling, for the sake of avoiding many error chromosomes, improves on the basic genetic algorithm, uses sigle unit genetic algorithm to optimize the Petri net model, lists the contrast of scheduling results.

本文首先介绍了MES的产生、定义、发展历程、功能及其发展现状，同时也分析了MES生产调度问题的各种解决方法及其存在的问题；接着以CY_MES为背景介绍了其支撑平台——SIMATIC IT平台的功能及其各组成部分，以及CY_MES的SIMATIC IT整体解决方案；紧接着在SIMATIC IT平台基础上，针对该烟厂的生产实际情况，设计了CY_MES生产调度系统的软件结构、功能结构、工单和子工单的数据结构和制丝与卷包生产调度的实现方式；最后，在比较了各种生产调度建模方法的利弊和对该烟厂制丝生产工艺流程深入研究后，利用Petri网建立了制丝生产调度模型，为了避免大量无效个体的出现，对基本遗传算法进行了改进，采用单个体遗传算法对这个Petri网模型进行了优化，并给出了调度结果的对比。

The current state of treatment of oil-bearing waste water from steel rolling is presented.

轧钢含油废水的处理现状，物理法和化学法处理轧钢废水存在较大的差异，两种方法各有利弊，综合比较，化学方法要比物理方法好。

The main reasons on condensed water production of oil-fired hot water boiler was introduced,the removal method of condensed water was carried out,and the advantages and disadvantages of condensed water was studied.

主要介绍了燃油热水锅炉烟气冷凝水产生的主要原因，冷凝水的利弊分析，冷凝水的排出措施。

This paper,based on the Amendments to the SOLAS 1974 concerning IMO Unique Identification Number System,the Guidelines for Implementation and the"Fair Play"by Lloyd,provides the study and analysis on how to implement the system as well as the recommended implementation measures.

本文以IMO有关&IMO公司和登记船东唯一识别号机制&的SOLAS 74修正案、实施通函和目前劳氏公平年鉴的实施情况为基础，就目前如何来实施该机制进行了分析和研究，对于我国实施该机制进行了简要的利弊分析，提出了我国的实施建议。

For all the blood and anger, might this war lead to another reweighing of costs and benefits of the sort that has unblocked diplomacy after previous hard-fought draws between Israel and its neighbours?

继以色列同其邻国间前一场硬仗打成平手之后，面对所有的鲜血和愤怒，本次战争会否让人们再次重新估量此种外交手段之利弊？

An adaptive detecting method on the pressure stage isproposed to make the acquisition process more standard, objective andautomatic.

在比较了以前的采集方法的利弊后，提出一种在手腕处施压的升压阶段自适应提取脉图的检测方法。

On the basis of interpreting concepts, combining the analysis of the advantage and disadvantage that focuses on the development of the Press Freedom at all times and in all over the world, I discuss the legal guarantee of the Press Freedom on the basis of analyzing new's legal relation. Moreover, I break through the original research mode, and re-recognize the reasonable restriction of the Press Freedom by the way of classifying news.

在概念明确的基础上，笔者结合古今中外新闻自由发展的利弊分析，一方面从新闻法律关系入手，正面论述新闻自由的法律保障问题；另一方面突破原有对新闻自由合理限制规则的研究模式，从新闻分类这一新的视角来重新认识新闻自由的合理限制问题。

The women's contingent is well-represented in the competition by WPBA touring pros Monica Webb and Helena Thornfeldt.

妇女的队伍是好的代表，在竞争中由wpba旅游的利弊，莫尼卡韦伯和赫勒拿特恩费尔特。

This paper advances the reasonable way of using iframe to design web based on the analysis of the advantages and disadvantages in the process of the normal frame web design and application.

通过分析普通框架网页在制作和使用过程中的利弊，提出了合理且巧妙使用内联框架的解决方法，使得设计出来的网页既有普通框架网页的优势，又较好地克服了普通框架网页的不足，并且还使网站的性能和专业化程度都得到了较大的提高，在实际应用中具有较强的可操作性

With the engineering practice of 2×1000MW ultra-supercritical unit of Stage 4 Project of HDPI Zouxian Power Plant at the period of equipment designing and selecting,the advantages and disadvantages of two-row arrangement scheme and single-row arrangement scheme of the high-pressure heaters are discussed in detail.

结合华电国际邹县发电厂四期工程2×1000MW超超临界机组在设计及设备选型阶段的工程实践，对选用双列高加布置方案或单列高加布置方案的利弊进行了详细的论述，所述内容应对以后的超超临界机组的系统设计有所借鉴作用。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。