英文研究论文常用英语句子

existence of time delay would deteriorate the performance of system or even be the important source of instability.     时滞的存在可能会破坏系统性能，甚至造成不稳定 delays are frequently encountered in many fields of science and engineering, and they are often a source of degradation in system performance or instability.     时滞现象频繁出现在许多科学和工程的领域中，并且它通常是导致系统性能下降或不稳定的原因。     3. In both delayed control and delayed measurement, the delay is usually considered undesirable since it has the tendency to deteriorate the system performance or even destabilize the system.     在具有延时的控制和测量中，时滞是不受待见的，因为它具有使系统性能恶化甚至使系统不稳定的趋势。 4. The last decade has shown an increasing research activity on time-delay and/or sampled-data systems analysis and control due to both emerging adapted theoretical tools and also practical issues in the engineering field and information technology (see Sipahi, Niculescu, Abdallah, Michiels, and Gu (2011) and Zhang, Branicky, and Phillips (2001) and references therein).     在过去的十年中，由于出现了新的适应性理论工具以及工程领域和信息技术领域的实际问题，因此在时延和/或采样数据系统分析和控制方面的研究活动不断增加（请参见Sipahi，Niculescu，Abdallah，Michiels ，以及Gu（2011）和Zhang，Branicky和Phillips（2001）以及其中的参考文献）。 , there has been rapidly growing interest in the stability of the system with time-varying delays, which has strong background in engineering field , such as a networked control system, see  for example [1,2]. 最近，时滞系统的稳定性问题引起了广泛的关注，这在工程领域有很强的背景，如网络控制系统 derived delay-dependent criteria based on the LKF approach are usually expressed in forms of linear matrix inequalities (LMIs), whose conservatism is often judged by the upper bound of the time-varying method of Lyapunov-Krasovskii function (LKF) is one of the most popular approaches. In LKF, some useful terms are not ignored but considered, which makes the result much less conservative.     LF泛函方法是重要的方法。考虑一些被忽略的项，能够降低保守性1. Delays can cause oscillations or bad performance in a system. This makes it necessary to study stability of time-delayed systems. In addition to stability, for some applications, it may be crucial to determine the convergence rate or the transient decaying rate of system states.     时滞会产生差的系统性能。研究时滞系统是必要的。除了稳定性以外，对于某些应用而言，确定系统状态的收敛速率或瞬态衰减速率可能至关重要。 1. Cross-coupling control idea is widely used to design the synchronization  controller,  which  can  be  seen  in literatures[2–8,11,13–17,20,22].     交叉控制思想已经广泛被用于设计同步控制器，如文献[2-8] 2. Steel rolling mill control  is an example of measurement delay, which is found in Sbarbaro-Hofer [240].     轧机控制是测量延迟的一个例子，可以在Sbarbaro Hofer[240]中找到。 3. Analysis of the delayed resonator  as well as  its applications  are reported  in [216, 217, 63, 125].     [216，217，63，125]对延迟谐振器及其应用进行了的分析。 4. For example, the finite dimensional systems could represent a dynamic controller for a system modeled by a PDE ( see d’Andréa Novel, Boustany, Conrad, and Rao (1994), Krstic (2009) and references therein ).     例如，有限维系统可以代表由PDE建模的系统的动态控制器（请参见d'AndréaNovel，Boustany，Conrad和Rao（1994），Krstic（2009）及其参考）。 5. Instead , a system of ordinary differential equations (ODEs) can model a component coupled to a phenomenon described by PDEs as in Daafouz, Tucsnak, and Valein (2014).     相反，如Daafouz，Tucsnak和Valein（2014）所述，常微分方程组（ODE）可以对与PDE描述的现象耦合的组件进行建模。 6. In the past few decades, fruitful results have been obtained for the robust stability of uncertain systems with time-varying delays by using the LKF approach.     过去几十年，时滞不确定系统的鲁棒稳定性已经取得丰硕研究成果，通过使用LKF方法 core idea behind an event-triggered control is that the update of control commands is only executed after the occurrence of an event rather than the lapse of time in a periodic fashion注意：介绍具体的现有研究工作，不是简单的堆叠，需要有层次，逻辑，目的。简单的说，要通过现有的结果，凸显出研究的必要性和重要性。基本上可以采取总—分—总的结构，     总：研究的主要方向，思路，方法     分：针对不同的方向，列举参考文献；注意不应随意列举，要有代表性，并且对文章有所点评，指出不足或优点。这部分的目的仍然是要突出             自己文章的优越性。     总：综上所述，本文研究的目的是为了解决现有文献中的哪些不足 1. The time domain method based on Lyapunov stability theory is abroad exploited . Among some inequality-based stability conditions, the linear matrix inequality (LMI) approach becomes a powerful and popular means to tackle the stability issues of power systems with  time-varying delays (see [4], [6], and [9]–[12]).     基于Lyapunov稳定理论的时域方法广泛研究。一些基于不等式的稳定性条件中，线性矩阵不等式的方法是解决具有时变时滞电力系统稳定问题的有效工具 2. To handle the time-varying and random delays, the time domain indirect methods based on Lyapunov stability theory and linear matrix inequality techniques (LMIs) have been proposed as an effective method to obtain approximate value of the delay margin [13].     为了处理时变时滞和随机时滞，基于Lyapunov稳定理论的时域直接方法和线性矩阵不等式技术已经成为获得时滞裕度近似值的一个有效方法 3. In order to diminish the conservatism for the stability conditions of time-varying delay systems, many approaches were developed. The main efforts have been focused on two aspects: one is the techniques of constructing L–K functional , such as delay-division functional, functional with matrices dependent on the time delays [13], functional including the ones with triple-integral terms [14], and quadratic terms which is multiplied by a higher degree scalar function [15] .The other is the analyzing methods for estimating the derivatives of L–K functionals with respect to time , such as improved majorization technique, free weighting matrix method [16], integral inequality including Jensen inequality [11], Wirtinger inequality [17], auxiliary function-based integral inequality [18],  and convex combination ideas incorporating linear convex analysis [19], reciprocal convex technique [20], and quadratic convex approach [21].     许多方法被用来减少时变时滞系统稳定判据的保守性。主要工作集中在两个方面：一是L-K泛函的构建，如：时滞分割函数，其函数矩阵决于时滞[13]，具有三重积分项的函数[14]，和高阶标量函数相乘的二次项[15]。另一方面是估计L-K泛函时间导数的分析方法，如：改进的专业化技术，自由加权矩阵方法[16]，Jensen不等式[11]，Wirtinger不等式[17]，基于辅助函数的积分不等式[18]以及结合线性凸分析的凸组合思想[19] ，倒凸技术[20]和二次凸方法[21]。 4. The last decade has seen a tremendous emergence of research devoted to the construction of Lyapunov–Krasovskii functionals which aims at reducing the inherent conservatism of this approach.     过去10年中，大量研究致力于构造L-K泛函，旨在减少固有保守性  Apart the choice of the functional, an important source of conservatism relies also on the way to bound some cross terms arisen when manipulating the derivative of the Lyapunov–Krasovskii functional.     除了泛函的选择，保守性的另一个来源是处理L-K泛函导数时产生的交叉项 1. Zhang et al. [1] have developed chaotic speed synchronization controller for multiple induction motors by using stator flux regulation. xx[1] 利用 定子磁通量调节技术 开发 了 用于 多个感应电动机的混沌速度同步控制器。 2. Starting from a semi-group modeling of the PDEs, the authors of Gahlawat and Peet (2017) construct a very general Lyapunov functional whose parameters are optimized via a sum of square procedure ( see also Ahmadi, Valmorbida, & Papachristodoulou, 2016).     起始于PDEs的半群模型，(2017)中的作者构建了一个非常一般化的Lyapunov 泛函，其参数通过平方和流程优化 1. In combination with a simple choice of Lyapunov–Krasovskii functionals, this inequality leads to new stability criteria for linear time-delay and sampled-data systems.     结合简单选择的Lyapunov–Krasovskii函数，这种不等式能够得到线性时滞和采样数据系统的新稳定性标准。1. 在现有文献中      reported in the literature 2. 近年来/多年        in the last decade  3.研究结果被推广  The result of this study can be generalized for …   4. 本文旨在讨论      It is the aim(intend, purpose) of this paper to discuss (present, describe)    5. 已经得到             have concluded, gained, obtained, yielded, arrived at, generated, acquired, achieved 6. 结果表明             This result(fact, demonstration, illustration, classification, comparison, analyses) gives (shows)  7.公式是基于          The formulas is derived for … according to … 1. Do not hesitate to contact me if I can be of any assistance.

英语写作常用十大句型

英语写作都有哪些常见句型呢?下面就让我为大家讲解一下吧。

一、否定句

许多否定句不含not的否定结构。如果论文作者能正确使用他们，就会增加写作的闪光点，使文章显得生动活泼。

1、Instead of indulging in playing computer games, children should be taught how to benefit from useful information on the internet.应该教孩子们如何从互联网获取有益的信息，而不是沉溺于玩电脑游戏。

2、On no account (Under no circumstances)can we ignore the immense value of knowledge. 我们绝不能忽视知识的巨大价值。

3、College students take part-time jobs not formore money but fora better understanding of societies.大学生参加兼职工作不是为了赚更多钱，而是为了更好地了解社会。

4、One’s salary doesnot depend so much on his educational background ason his ability and contribution to the society.一个人的工资与其说取决于他的教育背景倒不如说取决于他的能力和对社会的贡献。

5、In terms of nutrition, fast foodis far from satisfactory.从营养角度来说，快餐远非令人满意。

6、Parentswould not expect their children to become useful persons withoutworking hard. 父母们不能指望孩子们不经过刻苦努力就可以成才。

二、非限制性定语从句

如果需要对前述的整个句子内容进行解释或说明，就可以用到非限制性定语从句。

1、Undoubtedly, practical courses can be used to the reality,whichis of vital importance to their developmentin the future. 毫无疑问，实用性课程可以用于实际中，这对于他们未来发展是非常重要的。

2、Children tend to imitate what they have seen and heard on mass media, which is sometimes dangerous and harmful.孩子们倾向于模仿大众媒体上的所见所闻，这在有时是危险和有害的。

3、The majority of students believe that part-time jobs will provide them with more opportunities to develop their interpersonal skills, which may put them in a favorable position in the future job markets.大部分学生相信业余工作会使他们有更多机会发展人际交往能力, 这对他们未来找工作是非常有好处的。

三、让步句

让步句是写论文最常用的句式之一，作者务必掌握以下4种用法，可以使英文句子起伏跌宕，富于变化。

1、This view is widely acknowledged;however，there is little evidence that smoking isbeneficial topeople’shealth.这个观点被广泛认可，然而，几乎没有证据表明吸烟对人们健康有利。

2、Although(Whilst)the computer has been widely used in class, it cannot replacethe role of teachers. 尽管计算机已经广泛用于课堂，但是它不能取代教师的作用。

3、Reasonable asthe opinion sounds, it cannot bear much analysis. 虽然这个观点听起来有道理，但是它经不住分析。

4、In spite of a lot of conveniences thatcars bring to people’s life, it can create a series ofserious problems.尽管汽车给人们的生活带来了许多便利，但是也产生了一系列严重的问题。

四、It引导的句子

It引导的句子是写作中使用频率最高的句式。作者应熟练掌握其用法，并能灵活运用到文章的开篇、主体段和结尾段中。

1、It is hard to imagine whatour life would look like without computers in modern society. 很难想象如果现代社会没有了计算机，我们的生活会变成什么样子。

2、It is conceivable thatbeing physically active does good to health. 可想而知，积极参加体育活动有利于身体健康。

3、It is a highly controversial issue whetherwomen should join the armed forces or not. 女性是否应该参军是一个非常有争议的问题。

4、It is universally acknowledged thatwater and air are indispensable to human beings.人们普遍认为，水和空气对人类不可缺少。

5、It is essential thatendangered species of animalsbeprotected against

being killed. 保护濒危的动物物种免遭残杀是必需的。

6、It is high time thatthe government took effective measures to solve these problems.该是政府采取有效措施来解决这些问题的时候了。

7、It has been made easier for modern peopleto communicate with each other by theinternet in a few seconds.现代人很容易通过互联网在几秒钟内就取得联系。

8、It is worth caring about the way a child behaves.关心孩子们的行为方式是值得的。

9、It is no use crying over the spilt milk.覆水难收。

10、It has been a few decades sincethe computer came into being.自从计算机问世以来已经有几十年的时间了。

五、假设句

假设句可分为真实假设句和非真实假设句两种。常用在主体段落表示正、反论证。

1、If we destroy old buildings, thenwewill ruin the traditionalculture andheritage.如果我们推倒老房子，就要破坏传统的文化和遗产。

2、Youwouldmiss the chance to interact with other studentsif you used internet at home. 假如你在家上网，你就会失去与其他同学交流的机会。

3、Once you change your present job, you will be faced with the danger of

being unemployed.一旦你变换了现在的工作，就面临着失业的危险。

六、倒装句

在写作中恰当和准确地使用倒装句，有助于句子表达形式的多样化，使语言更加生动有力。

1、Only in this way can the problem be tackled properly. 只有这样才能妥善地解决这个问题。

2、Only whenchildren take arduous efforts canthey become successful. 只有当孩子们付出艰苦的努力他们才能获得成功。

3、Not only does studying in school serve academic purpose, butstudents learn how to handle interpersonal relations. 在校学习不仅为了学术目的，而且还可以学会如何处理人际关系。

4、Under no circumstancesshould youngsters follow negative informationon mass mediablindly.青少年决不应当盲从大众媒体上的不良信息。

5、So valuable iswater that we cannot afford to waste it. 时间是如此珍贵，我们经不起浪费它。

6、Nowadays,most dangerous for youngsters isthe tendency to indulge in playing PC games.如今对青少年最为危险的事情是倾向于过多地玩电脑游戏。

七、强调句

写作时为了突出句子的某一成分，常常使用强调句。

1、It is for the benefit of maintaining the ecological balance that human beings ought to protect the endangered animal species.正是为了维持生态平衡，人类才应该保护地球上濒危的动物物种。

2、It is not untilpeople suffer from some fatal diseases such as SARS and AIDS thatthey are becoming aware of how significant it is for the government to invest more money in medical care.

直到人们患了像非典和爱滋病这样致命的疾病时，才意识到政府把更多的钱投入到医疗上的重要性。

3、Nothing in the world is more valuable than health.世界上没有比健康更重要的了。

八、比较句

正确地使用比较结构可以使文章的句式增加变化，有利于提高写作成绩。

1、Studies show that juvenile delinquency rates are twice as high foryoungsters from single-parent families as for those in traditional households.(同级比较)研究表明来自单亲家庭的青少年犯罪率是来自传统家庭的两倍。

2、Generally speaking, people in modern times enjoy less leisure time than they did previously.(比较级)一般说来，现代人比过去享有更少的休闲时间。

3、Compared with those with different abilities, children with intelligence do more well in their school work and intelligence tests. 与不同能力的孩子相比，聪明的孩子在学业和智力测验方面表现更加突出。

4、Contrary to pop stars, other professionals like doctors and teachers create the true value for theirsociety.与明星不同，其他专业人员如医生和教师为社会创造了真正的价值。

5、Airis to humanwhat (as)water is to fish.空气对人类就如同水对鱼一样。

九、插入语

插入语是对一句话做一些附加说明或解释。最常见的位置于句中,一般用逗号或破折号与句子隔开。用得恰当，不仅可以增加字数，而且使文章更显地道和精彩。

1、Computers,most important of all,create wide communication around the world. 最重要的是，计算机在世界范围内建立了广泛的交流。

2、Providing more parking areas,in the long run, has proved to be a practical way out in manylarge cities in the world.从长远的利益来看，提供更多的停车位证明是许多世界大城市切实可行的出路。

3、Observing local culture,consciously and unconsciously,can reduce the chance of offendingthe locals, or it will lead to the embarrassment and even conflict. 无论是否意识到，遵循当地的文化可以减少冒犯当地人的机会，否则，就会导致尴尬甚至冲突。

4、Space exploration, some people believe,will bring some unexpected discoveries. 有人相信空间探索将会带来意想不到的发现。

十、原因句

几乎所有的写作试题都要求写原因或者可以写原因。议论文的讲道理实际就是说明原因。因此，掌握好表达原因的结构是十分重要的。

1、Violent films can do harm to young people,because they contains numerous negative information.暴力影片对年轻人是有害的，因为其中包含大量负面信息。

2、Human beings are chiefly responsible for wild animal extinction.野生动物灭绝的主要责任在人类。

3、We should attribute(ascribe)medical advances tothe animals which do substantial contributions to the experiment.我们应该把医学的发展归因于动物对实验做出的巨大贡献。

4、Because of overpopulation, water shortage has become one of the most serious problems.由于人口过剩，水短缺已经成为一个最严重的问题。

5、Owing to the fiercecompetition in today’s world, a great many young people find themselves under great pressure.由于当今世界的激烈竞争，大量的'年轻人承受巨大的压力。

对于上述“十大句式”，具备以下显著特点：

1.“十大句式”具有普遍性。事实上，“十大句式”在阅读文章和写作范文中出现频率相当高，也是广大科研人员非常熟悉的句式。可以说，句句皆是万用的。一旦科研人员熟练地掌握了它们的用法，就能根据内容表达的需要，随时派上用场。用句夸张的话来说，就是“不怕写不到，就怕想不到”。

2.“十大句式”的提出基本符合最新科技论文写作评分标准中对句子结构的要求。“十大句式”中除了否定句、倒装句、插入语一般可以写成简单句以外，其它6到7句都属于复合句，占到总数的三分之二以上。换句话说，如果科研人员能运用十大句式正确地写出句子，那么不仅复杂句的数量就可以达到6到7分规定的要求，而且句式呈现多样化，复合句和简单句交错使用，以增强文章表达效果。

3. 增强科研人员句式的写作意识。“十大句式”对科研人员来讲，并不陌生，然而在写作考试中，由于时间紧迫，科研人员平时又缺乏运用已经掌握的句式的意识，因此多数科研人员以自己头脑中拼凑的中式英语取而代之，往往想不到运用这些句式。

4. 多数感觉句子写起来挥洒自如的科研人员，其中或多或少地在使用十大句式，在一定程度上说明他们头脑中已经培养起句式写作潜意识。

总之，句式变换直接影响到论文写作的成败。在此，衷心希望“十大句式”能为广大科技论文科研人员提供一条快速、高效的提高句式写作的途径，真正做到学以致用，“以不变应万变”

1、on account of… 因为…，由于… 2、account for… 说明…的原因 3、on the basis of… 根据…，在…的基础上 4、in any case无论如何，总之 5、in case of… 假使…，万一… 6、in no case决不 7、make sense讲得通，有意义 8、a great/good deal of大量（修饰不可数名词） 9、influence on影响 10、reply to…回答…，答复… 11、once upon a time从前 12、once in a while偶尔，有时 13、refer to…参考…，查阅…，涉及…，提到… 14、depend on…取决于… 15、devote to… 奉献…，致力于… 16、insist on…坚持… 17、look forward to… 盼望…，期待… 18、have something to do with…和…有点关系 19、have nothing to do with…和…毫无关系 20、be fed up with…对…感到厌烦 21、in detail详细地说 22、be accustomed to习惯于 23、be aware of…意识到… 24、be characterized by…以…为特征 25、be composed of…由…组成 26、be concerned about…关心…，挂念… 27、be determined to do something决心做… 28、be equal to…等于… 29、be identified as…被认为是… 30、be satisfied with对……满意，满足于… 31、as far as somebody be concerned 就...而言 32、as to… 至于…,关于… 33、be beneficial to… 有利于…，有益于… 34、adapt oneself to…=adjust oneself to…使自己适应于… 35、attribute…to…把…归因于…，认为…是…的结果 36、concentrate on…集中注意力于… 37、on the contrary与之相反 38、in detail详细地 39、deprive somebody of something剥夺某人某物 40、in essence本质上 41、inform somebody of something通知某人某事 42、major in主修… 43、in favor of… 有利于…，赞成…，支持… 44、in consequence因此，结果 45、in conclusion最后，总之 早检测论文查重系统我祝大家顺利通过~~~