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Considering the technical requirements,the stability andthe steady performance,the quantitative requirement for sampling frequency is present indiscrete control system.Considering that there is a step delay in discrete control in grid on inverter with a Lfilter,the quantitative relationship between critical FCCR and sampling frequency isanalyzed,and the steady performance is analyzed.Considering the technical requirements,the stability and the steady performance,the quantitative requirement for samplingfrequency is present in discrete control system with a step delay.

在L型并电加热管网中,考虑到离散化控制存在滞后一拍的问题时,本文分析并获得了离散PI控制系统稳定范围时闭环根临界频率fnmax和采样频率fs之间的定量关系;针对存在滞后一拍可能引起系统稳态特性下降的问题,分析了PI控制滞后一拍对频域特性造成的影响,综合考虑并网指标、稳定性要求和离散化对稳态特性影响三个主要因素,推导了存在滞后一拍的离散化PI控制对最低采样频率的量化要求。

As we know, spiro-conjugated compound 1',3',3'-trimethyl-6-hydroxyspiro[2H-1-benzopyran-2,2'-indoline] is one of thesignificant photochromic species, the structure and spectrum ofthe compounds 1',3',3'-trimethyl-6- hydroxyspiro[2H-1-benzopyran-2,2'-indoline] and its isomers have studied.

三。研究了一类重要的光致变色物质之一螺旋共轭化合物1′,3′,3′-三甲基-6-羟基螺旋[2H-1-苯并吡喃-2,2'-二氢吲哚]及其光异构化产物的结构、光谱,并在此基础上,用完全态求和公式自编程序计算了非线性光学系数。

The law connects moral demand together with economic order so as tosatisfy human pursuit of fairness、justice as well as to guarantee practical need ineconomic、social life.

法律将伦理要求和经济秩序的需要完美结合起来,既满足了人们对公平、正义的追求,又保证了经济社会生活的实际需要。

On the base of investigational analysis and the factual demands of teachers education and their professional development, the thesis gives some constructive advice.

在调查分析的基础上,结合教师教育和教师专业发展的客观要求和发展趋势提出一些建设性意见。

Pope Martin's reply was as follows: The aforesaid lord our pope said, in answer to these proposals, protestations, requests and suggestions, after silence had been imposed on all (since some were saying much and causing a disturbance), and by way of replying to the aforesaid points, that he wished to hold and inviolably observe, and never to contravene in any way, each and every thing that had been determined, concluded and decreed in a conciliar way, in matters of faith, by this present sacred general council of Constance.

教宗马丁的回答如下:上述耶和华我们的教宗说,在回答这些建议,表示抗议,要求和建议后,沉默已对所有(因为有些人说得多,并导致骚乱),并透过回答以上述各点,他希望持有及inviolably观察,并没有违反任何方式,每个一件事已经确定,结束了,并下令在conciliar方式,在信仰方面,目前这个神圣的总理事会的人

In this article, authors introduce design requirements and construction methods of the jointless construction of the ultra-long large area concrete floor structure of Nanjing Olympic Sports Center Stadium.

介绍了南京奥体中心体育场超长大面积混凝土楼面结构无缝施工的设计要求和施工方法,施工中采取了合理的分段分块施工和超长预应力筋的张拉措施,使楼面结构工程顺利完成。

Mohammed's conception of his own calling and the fate which his efforts had to endure at the hands of the infidels ("kafir"="kofer") appeared to his mind as a reflection of the prophets of the Bible, whose number he increased by a few characters borrowed from an old tradition.

穆罕默德的概念,他自己的要求和命运而他的努力不得不忍受在手中的异教徒(& kafir &=& kofer &)的出现,以他的态度反映了先知们的圣经,他们的人数增加,他由一个数字符(例如,住房和城市发展部和ali )借来的,从老的传统(见jubilees ,帐簿)。

After giving the definition of copy method, we present two impor-tant lemmata and discuss the NP-completeness of the above two minsum and minmax problems.

文中在给出了复制法的定义后,又给出两个重要的引理,接下来主要讨论了上述两极小化求和及极小化极大分批排序问题的NP-完备性。

According to real-time requirement of stream data and losable characteristic of transportation, the thesis analysis existing stream data signature methods suc h as star-s haped tree-shaped and Golle chain. Considering the condition of limit ed resource of receiver, it proposes forward plac ed hash chain data signature sc h eme based on Gilbert-Elliot Network channel model and enhanc ed Golle chain stream data signature method.

本文针对流式数据实时性要求和传输中易丢包的特点,分析比较了现存的星型、树型、Golle链型等几种典型的流式数据签名方法,考虑到接收方资源有限的情况,基于Gilbert-Elliot网络通道模型,改进了Golle链型流式数据签名方法,提出了一种hash值前置流式数据签名方案。

The company excels in viewofthe different user's operation requirements and the erection bay condition.for the customer design,plans the optimization to bepossible the renewable energy soures send,the powersupply technology,the economical plan,and can provide the complete set the incorporationor independentsolar energy light bends down the generating system,the solar energy/windenergy supple mentary generating system,realize "hands over the key"the project.

公司擅长针对不同用户的使用要求和安装现场条件,为客户设计、策划出优化的可再生能源发、供电技术、经济方安、并且能够提供成套的并网或独立太阳能光伏发电系统、太阳能/风能互补发电系统,实现&交钥匙&工程。

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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。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力