算了
- 与 算了 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Firstly, after the analysis on probability distribution of GenCos' bidding results, a concept of bid acceptance probability distribution function of GenCos is proposed; then based on the features of bidding structure in day-ahead and real-time markets, a multi-objective bi-level programming bidding strategy model in day-ahead and real-time markets for GenCos is built for electricity markets in which the step-wise bidding function and pay-as-bid settlement protocols are utilized; and then in order to solve the proposed model an algorithm based on Monte Carlo method and genetic algorithm is designed; finally, the simulation of numerical examples are performed to verify the correctness of the proposed model and algorithm.
首先在分析了发电商竞价结果的概率分布之后,提出了发电商竞价成功概率分布函数的概念。然后基于日前和实时市场中投标结构的特点,针对采用分段报价和按报价结算(pay as bid price,PAB)方式的电力市场,建立了日前和实时市场中发电商的多目标二层规划竞价策略模型,并设计了以蒙特卡罗方法和遗传算法为基础的求解算法。最后采用算例对所提出的模型和算法进行了仿真验证。
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Based on the laminate theory, a laminate weakened by damage is treated as an anisotropic thin plate. Using the complex potential method in the plane theory of elasticity of an anisotropic body, the series solution of finite anisotropic thin plate containing an elliptical inclusion is proposed with the help of Faber series. A hybrid element with an elliptical inclusion for anisotropic materials is obtained by using the hybrid variable principle, and the element efficiency is verified by numerical examples. The state of the damage is modeled by an elliptical soft inclusion, and using the point stress criterion based on characteristic curve and Yamada-Sun etc. criteria, the prediction of the strength of a composite laminate with damage is set up. The effects of various parameters on the stress distribution and the residual strength of a composite laminate weakened by damage are detailedly studied.
首先基于经典层板理论,将复合材料层板的弹性问题化归为均匀各向异性板来求解;采用各向异性体平面弹性理论中的复势方法,以Faber级数为工具,给出了有限大含椭圆核各向异性板弹性问题的级数解形式;利用杂交变分原理,成功导出含椭圆核各向异性板杂交应力有限元,并用算例验证了该单元的可行性和有效性;采用含刚度折减椭圆形弹性核的冲击损伤模型,引入基于特征曲线和Yamada-Sun破坏准则的点应力判据,建立了含损伤复合材料层板剩余强度的分析方法;通过数值计算详细讨论了各种几何参数对损伤层板应力分布、剩余强度的影响,得到了一系列对工程应用具有实用价值的结论。
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In chapter 3, the paper proposed a new kind of preference relation, i.e. distance preference relation; followed this, a scale was introduced for constructing antisymmetric matrix, and consistency of the matrix was defined, three methods for computing priority vector were studied; At the end, two examples were used to demonstrate the application of the new method,and they showed that the introduction of antisymmetric matrix to AHP is effective and valuable.
本文首先对Saaty AHP的几种常见标度进行了比较分析,然后对正互反判断矩阵及模糊互补判断矩阵的权重计算方法进行了归纳和总结;最后,本文提出了一种新的偏好关系,即基于"差"的偏好关系,从而将反对称矩阵引入层次分析法,接着对新型偏好关系下判断矩阵的构造、一致性的定义与性质以及权重的计算方法做了初步的研究,最后用算例说明了新方法的应用,并做了相应的比较分析,结果表明采用基于"差"的偏好关系构造反对称矩阵拓展了AHP的应用范围,有一定的理论和应用价值。
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Around the topic, the weak points of the traditional platform is analyzed first, such as complex arithmetic, long calculating time, high needs of hardware and so on. A real time control method based on virtual simulation is suggested to separate the complex positive/negative calculation of space kinematic and real time motion control. And a"3-2-1"type 6DOF platform is designed with the reference of the MAST (Multi-Axis Shaking Table) of MTS. The kinematic and dynamic calculation of the platform is finished. According to the calculating result, the control system of the"3-2-1"type 6DOF platform including 6 linear servo electric cylinders is designed and constructed. And the professional software Pro/E is used to do the 3D model and 6DOF motion simulation of the platform. The motion curves of the pistons of the 6 cylinders are exported with the simulation. At last the control software is programmed with Microsoft Visual Basic 6.0 and realizes the functions with the commands of GE series motion controllers. When loading the motion curves exported with the simulation, every cylinder can follow the curve very well and the platform realizes the hoped 6DOF motion.
围绕选题,本论文首先分析了传统的运动平台控制方法所存在的算法复杂、解算耗时长、硬件需求高的缺点,提出了一种基于虚拟仿真的实时控制方法,该方法将复杂的空间运动学正、反解与实时运动控制相分离;之后,参考MTS公司的MAST多轴振动平台,设计了新型的"3-2-1"型六自由度平台,并进行了运动学及动力学计算,根据相关计算结果,设计与搭建了包括驱动6个直线伺服电动缸在内的"3-2-1"型六自由度平台控制系统;接着,使用Pro/E对"3-2-1"型六自由度平台进行了三维建模和六自由度运动学仿真,并由仿真直接获得了6个直线伺服电动缸的活塞杆的相应运动曲线;最后使用Microsoft Visual Basic 6.0编写了控制软件界面,通过调用GE系列运动控制卡的各种命令函数实现了控制系统的相关功能,而当加载仿真得到的各缸运动曲线后,每缸均能很好地跟踪输入曲线,使平台实现了期望的多自由度运动。
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This paper determines the design idea of combining VISC with structural optimization design. Problems which existed in structural optimization design are analyzed and contents of optimization process are determined. Calling and dominating calculation program written in FORTRAN in the development environment of Delphi are realized by the techniques of FORTRAN/Delphi mixed-language programming and multi-threaded application. Parallel coordinates visualization technology is deeply researched and applied in software exploitation of optimization process. Essential programs of VISC software are compiled. Approaches which can improve efficiency of optimization are discussed. In the end, functional modules are integrated and a typical computational example is verified.
本文通过对结构优化设计和科学可视化的研究,确立了天线结构优化设计与科学计算可视化技术紧密结合的思路;根据天线结构优化设计的特点,针对优化设计中存在的问题,对系统结构优化的总体框架进行了分析和论述,确定了优化过程可视化的具体内容;通过FORTRAN与Delphi的混合语言编程实现了在Delphi环境下对FORTRAN计算程序的调控,充分利用了原有FORTRAN程序资源;对平行坐标技术进行深入研究,并将其应用于优化过程可视化模块的软件开发中,实现多维数据空间的可视化;编写优化计算过程可视化软件的核心程序;探讨了提高优化效率的途径;对基于可视化的天线结构优化设计软件系统进行集成,针对某天线进行了算例验证。
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I present cluster schema for combinatorial problem with clustering, design a new crossover operator cluster crossover, study the survival probability of c-schema under c-crossover, apply it successfully to graph coloring, load balancing and maximum spanning tree problems: give measurements of diversity in GA, set up varying crossover probability algorithms to maintain diversity, obtain good results when apply it in avoiding premature convergence and multi-modal functions optimization; establish GAC to be suitable for non stationary function, it can explore the change of environment and find the best solution even for some"anomalous"function.
针对聚类组合优化问题提出了聚类模式,设计了一种新的交换操作:聚类交换并研究了聚类模式在聚类交换操作下的生存可能性,成功的将聚类交换思想和算子应用于图着色、负载平衡和最大生成树问题,佐证了类理论,表明类理论可以指导新的应用算法设计;给出了GA中多样性的度量标准和维护多样性的动态交换概率算法,用于避免过早收敛和多峰函数优化,取得了较好的结果;构造了维持种群多样性以适应动态环境的方法GAC,在某些现有方法无能为力的问题上,GAC能够探测到环境变化,找到当前最优解。
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My western comrades, how about not to mention the murderers in Tibet? That would be useful 20 years ago, but it is only sth disgusting now. Besides, as the posterity of those pirates and traders in human beings, don't you think it is a little forgetful for you to say that? In the past your forefathers made great efforts to massacre tens of millions of Indians to get the American continent. Oh wait, please do not mention the theory of 'variola depopulation'...even the black death was not strong enough to kill out your ancestors, how can variola do that? This theory is cheeky!
西方的同志们,不要再拿西藏的那些杀人犯来说事儿了,20年前也许还有点用,现在只能招人厌恶,再说了,身为强盗和人贩子的后代,你们说这些话有点数典忘祖,想当年,你们祖宗可是花了九牛二虎的力气灭绝了几千万印第安人,才把美洲给占了,哦对了,别在提所谓的'天花灭绝'论,想当年黑死病那么厉害都没把你们祖宗给灭绝了,天花算个鸟,这说法也忒无耻了一点。
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Chapter 4 of this dissertation has carried out a physical simulation study about the processes of formation and laws of evolution of the fan delta in Baimiao gas field. Based on the results of the study about the geological background in this area, this paper has discussed about the sedimentation facies marks for the fan delta in Baimiao gas field, worked out a detailed proposal about the development of physical simulation experiment about the fan delta, and described in detail the general laws and major controlling factors governing the sedimentation processes of the fan delta. A detailed measurement was made about the experimental results, and a systematic comparison was made relative to the prototypic characteristics. Based on the observation and description about the experimental processes and the analyses about the experimental results, this paper has give
在本章中,指出了数值模拟研究的基本特点,给出了扇三角洲形成过程的基本控制方程和数学解法:在此基础上设计和开发了扇三角洲形回成过程的平面二维数值模拟软件,并对计算过程中所遇到的主要问题一计算速度较慢开展研究,对比了以天、旬、月为时间单元进行汁算对沉积结果的影响,研究认为,在流量无突变的情况下,可以适当增长计算的时间步长和适当放松精度要求;根据白庙气田扇三角洲的基本地质特征设计了数值模拟计算的基本条件,以月为单位,计算了扇三角洲四百年的形成过程及演化规律,并以50年为单位输出沉积结果;本章最后还对数值模拟方法及结果进行了讨论。
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Firstly, This text has described information fusion technology characteristic, form structure and concrete processing method, and application of information fusion in fault diagnosis proves the feasibility and validity from the angle of information theory. Based on this,it is combined the fault diagnosis of aeroengine with Information fusion, a method and model which the fault diagnosis of aeroengine information fusion is brought forward. a research which combined neural networks with D-S evidence is brought forward. Based on the analysis of single neural network characteristic, the model of roted neural network is put forward. With the simulation based on the example, we can know evidence theory fusion improved the fault diagnosis It is hard to give the basic probability function in the process of using the evidence theory, So the model based on network and D-S evidence is put forword.
本文首先论述了信息融合技术的特点、形式结构和具体的处理方法,并从信息论的角度论证了信息融合技术在故障诊断中的可行性和有效性;在此基础上,将航空发动机故障诊断与信息融合相结合,提出了一种基于信息融合技术的发动机故障诊断模型和方法,并在此基础上,提出和分析了基于人工神经网络和D-S证据理论的信息融合故障诊断,研究了神经网络的建模方法、组建原则和实现策略,并结合诊断实例进行了分析;提出了基于D-S证据理论的决策融合,阐述了D-S证据理论的方法,模型,并结合算例进行了分析。
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How when we are in a Doubt or Hesitation, whether to go this Way, or that Way, a secret Hint shall direct us this Way, when we intended to go that Way; nay, when Sense, our own Inclination, and perhaps Business has call'd to go the other Way, yet a strange Impression upon the Mind, from we know not what Springs, and by we know not what Power, shall over-rule us to go this Way; and it shall afterwards appear, that had we gone that Way which we should have gone, and even to our Imagination ought to have gone, we should have been ruin'd and lost: Upon these, and many like Reflections, I afterwards made it a certain Rule with me, That whenever I found those secret Hints, or pressings of my Mind, to doing, or not doing any Thing that presented; or to going this Way, or that Way, I never fail'd to obey the secret Dictate; though I knew no other Reason for it, than that such a Pressure, or such a Hint hung upon my Mind: I could give many Examples of the Success of this Conduct in the Course of my Life; but more especially in the latter Part of my inhabiting this unhappy Island; besides many Occasions which it is very likely I might have taken Notice of, if I had seen with the same Eyes then, that I saw with now: But 'tis never too late to be wise; and I cannot but advise all considering Men, whose Lives are attended with such extraordinary Incidents as mine, or even though not so extraordinary, not to slight such secret Intimations of Providence, let them come from what invisible Intelligence they will, that' I shall not discuss, and perhaps cannot account for; but certainly they are a Proof of the Converse of Spirits, and the secret Communication between those embody'd, and those unembody'd; and such a Proof as can never be withstood: Of which I shall have Occasion to give some very remarkable Instances, in the Remainder of my solitary Residence in this dismal Place.
有时,我们会陷入无所适从的境地,踌躇不定不知道该走哪条路才好。这时候,内心常常会出现一种暗示,指示我们走这条路,虽然我们原来想走的是那条路。不仅如此,有时我们的感觉、愿望、或我们的任务明明要我们走那条路,可是心里忽然灵机一动,要我们走这条路;这种灵机也不知道是从哪里来的,也不知道出自什么影响,可就是压倒了原来的一切感觉和愿望,使我们走这条路。结果,后来的事实证明,如果我们当初走了我们自己想走的路,或者走了我们心目中认为应该走的路,我们则早已陷于万劫不复的境地。反复思索之后,我自己定下了一条规矩:每当自己心里出现这种神秘的暗示或冲动,指示我应做什么或不应做什么,我就坚决服从这种神秘的指示,尽管我不知道为什么该这么做或该这么走,我知道的只是心里的这种暗示或冲动。在我一生中,可以找出许许多多这样的例子,由于我遵循了这种暗示或冲动而获得了成功,尤其是我流落到这个倒霉的荒岛上以后的生活,更证明了这一点。此外还有许多例子。当时我若能用现在的眼光去看待,是一定会意识到的。但是,世上有许多道理,只要有一天能大彻大悟,就不算太晚。我奉劝那些三思而后行的人,如果在他们的生活里,也像我一样充满了种种出乎寻常的变故,或者即使没有什么出乎寻常的变故,都千万不要忽视这种上天的启示,不管这种启示是什么看不见的神明发出的。关于这一点,我不准备在这里讨论,也无法加以阐明。但这种启示至少可以证明,精神与精神之间是可以交往的,有形的事物和无形的事物之间是有神秘的沟通的。而且,这种证明是永远无法推翻的。关于这一点,我将用我后半生的孤寂生活中一些很重要的例子加以证明。
- 推荐网络例句
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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。
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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。
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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