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At first, this paper surveys nonlinear control and the applications of neural networks in control respectively. Then it studies definitions, mathematical descriptions and conditions of invertibility for nonlinear systems, which are used to analyze the feasibility of inverse system control method. Conclusions about the feasibility of inverse control and the realizability of αth-order inverse systems in engineering are achieved. Furthermore, this paper discusses the feasibility, structure and identification of neural network αth-order inverse system for general single-input single-output continuous or discrete nonlinear systems and various composite control methods based on the αth-order inverse. At last, as a part work of an actual project, this paper focuses on the design of neural network αth-order inverse control method for thyristor controlled series compensation in power systems and its effect in improving the stability of power systems.
本文首先分别概述非线性系统的控制与人工神经网络在控制中的应用;然后研究非线性系统各种可逆性的定义、数学描述及可逆性条件,并用于分析逆系统控制方法的可行性,得出有关逆系统控制方法可行性的结论,阐明一般情况下α阶逆系统才工程可实现;接着本文针对一般单输入单输出连续、离散非线性系统,研究神经网络α阶逆系统的可行性、结构与辨识以及基于神经网络α阶逆系统的各种复合控制方法,并给出应用例子;最后本文结合实际项目,针对采用可控串补的电力系统,设计神经网络α阶逆系统控制方法,研究其对提高电力系统稳定性的作用。
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The death rate grew by 37%. Chinese previously did not need security door. But by now, to some place, security window has been set at seventh floor. For there are too many gangster every where, no company in China would arrange with their workwomen to go home at night. No body knows what really are the food every one have everyday. Neoteny has take place on children. Then we can imagine the situation of our health in the future. There are about 20 million girls in China are pursuing sexual work. That creates 6% of GDP aggregate, which is as much as 1000 billion RMB. This kind of activity had never appeared in the history of human being except Japan. The height of Chinese people is 2.5cm lower than that of Japanese. We can no longer see them by looking down. The small Japan became big Japan. We create 0.1 billions GDP with the payment of 1 person's life, reported by reference news. The number of death in 2003 is 136 thousands. So the number of industrial injury will be 200 thousands. It is true that our GDP is bloody. Actually, this number is a small part of the true number. The numbers which can be accounted are in nationalized business or in a big accident. In personalized business or overseas-funded enterprise, the owner do not pay attention on the death of workers. So the data can not pass to the statistical department. However, the number of death there is much more than that of the first ones. If we add this in account, the number,annually can be compared with the massacre in Nanjing.
中国人从原来不知道防盗门窗为何物,到现在防盗窗已安装到了楼房的七层以上;由于流氓遍地防不胜防,全国企业早已不再安排女工上下夜班;有毒食品已经100%的覆盖了全部行业,每天人们咽进肚子里的食物究竟是什么,只有天知晓;性早熟现象已经蔓延到了学龄前儿童,未来的身体和寿命可想而知;约2000万少女被迫卖淫,创造的收入占GDP总量的6%,相当于一万多亿人民币,这种肉体积累是世界历史上除日本之外绝无仅有的现象;中国人的平均身高比日本人低了2.5公分,由以前低头看日本人到现在抬头看日本人,小日本真的成了"大日本";《参考消息》报道,中国每亿元GDP工伤死亡1人,2003年死亡达13.6万人,以此推算,今年工伤死亡人数将达到20万,"是名副其实的带血GDP",其实这个死亡数字不过是冰山一角,能够统计到的死亡数字,要么是国有企业,要么是死人较多的特大事故,私企和外企平常死个把人根本到不了统计部门,而私企和外企用工数量远远超过国有企业,如果考虑到这个因素,每年死亡人数至少相当于一场南京大屠杀。
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Experiment through a water work model to the figure which turn on water tower from the hydraulics angle, from the hydraulics angle to the figure structure which turn on water tower and turn on water hole carry on a verification with excellent turn, emphasize research to turn on water tower dissimilarity under the size circumstance of the figure structure of enter the water bore water current flow Tai and release excessive water ability, water current to press a strong circumstance towards turn on water tower tower wall, scaleboard creation of pound at, and put forward more and so releasing excessive water circulate to adjust one degree way.
从水力学角度对放水塔的体形通过水工模型试验,从水力学角度对放水塔、放水洞的体形结构进行验证和优化,着重研究放水塔不同体形结构尺寸情况下的进水孔水流流态、泄洪能力、水流对放水塔塔壁、底板产生的冲击压强情况,并提出较好的泄洪运行调度方式。
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The first part is the introduction, which generally introduces the research purpose and significance of this thesis, the summary of the financial pre-warning researches both home and abroad, and the research main contexts and research methods; The second part is the comparison on the financial pre-warning methods existent, which compares the different methods by categories, makes a further analysis on the limits of existent methods, and proposes the improve thoughts of this research based on that; The third part is the basic theory, which makes a summary of the referent theories exerted on the research, and exposit the comparing mechanism of the grey prediction theory and the artificial neural network method concise; The fourth part is the frame work of the model, which illuminates the research designs step by step, such as the definition of the financial crisis, the method of sample select, the select and definition of the pre-warning variables, and makes an exposition of the establishment procedures of the whole models at last; The fifth part is the financial pre-warning based on the theory of grey prediction and artificial neural network, which mainly demonstrate the model establishment in the concrete, dividing into four part to carry out the part of pragmatic research integrally, building of indexes system, establishment of BP neural networks, dynamic financial pre-warning and test, analysis on the pre-warning result; The sixth part is conclusion, which sums up the main results of the whole research, clarifies the innovative points, and makes a discussion on the limits and future study directions of the research in this thesis.
其中,第一部分为导论,总括性概述本文的研究目的与意义,国内外研究综述,以及本文的研究内容和方法;第二部分为现有财务预警研究方法剖析,通过对现有预警方法进行分类比较,进一步分析现有预警方法的局限性,并在此基础上提出本文研究的改进思路;第三部分基本理论,对本文研究中运用的相关理论进行扼要概述,并简要阐述灰色预测理论与人工神经方法的融合机理;第四部分为模型研究框架,逐步阐释模型对财务困境的界定,样本数据的选取方法,预警变量的选取与定义等各个部分的研究设计,并对整体模型的构建步骤进行简要阐述;第五部分为基于灰色神经网络模型的财务预警,主要论述动态预警模型的具体实现过程,分模型指标体系的建立,BP神经网络的建立,动态财务预警与检验,以及预警结果分析四个部分全面阐述本文实证分析过程;第六部分为结论,总结本文研究得到的主要研究结论,以及本文研究中的创新之处,并对论文的不足与后续发展研究进行探讨。
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I was very tired yesterday,i went to work a whole day.in the evening,wai wanted to teach paul and me how to relax,he took us to go to sanlitun bar,this bar is called tree,a very wried name.but i really had a wonderful night in there,lighted the candle,we were so funny in a dark setting,we drunk beer and juice and so on,i was a little drunk,i did not feel very high but wai thought he was high on alcohol,at last,some waiter who neared us laught at us.
昨天很累,忙了整整一天,晚上 wai 想教我和 paul 如何放松,他带我们去了三里屯酒吧,一个叫"树"的地方,一个很奇怪的地方。不过我们确实度过了一个很美好的夜晚,点上蜡烛,在阴暗中我们非常的搞笑,喝了啤酒,果汁酒等等,我有一点微醉了,我觉得还不够啊, wai 说他已经开心的够了,最后我们的行为把旁边的服务生都笑坏了。
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A bstract: this system main contents is launching under the discussion of book sale management system, which main aim at a book batch to sell and retail sales sale is lord but carry on designing , in keeping with book's sell retail of management, specially be applicable to book market and book batch resources that sell company's coordination management.the system source code adopt c# language by writing format and in the vs.net 2005 integration environment bottom adjust to try to carry on, the sql server of the database adopt be 2000 backstages.it's system's turn to is a great deal of adoption abundant database technique, have already aim at a mold piece line of development, among them database operation layer technique a great deal of adoption saving process and trigger a machine of application, database interview layer technique adoption microsoft company of ado.net latest 2.0 development technique, the database mean a layer adoption unify of external appearance mode, make thus the whole system structure clear in meaning, the source code self own very good performance of readability and writability, then better convenience to customer operation and development personnel next move of development work, the type of tree control and user-defined page technique of usage make the whole system person's machine hand over with each other the function be more outstanding.
本系统主要内容是围绕图书销售管理系统而展开讨论的,主要针对图书批销以及门市销售为主而进行设计的,适合图书进销零售的管理,特别适用于书城及图书批销商协调的资源管理。系统源码采用c#语言书写格式,在vs.net 2005集成环境下调试进行,数据库采用sql server 2000后台。该系统大量采用了丰富数据库技术,有针对性模块行的开发,其中数据库操作层技术大量采用存储过程及触发器的应用,数据库访问层技术采用微软公司的ado.net最新2.0开发技术,数据库表示层采用统一的外观模式,从而使得整个系统架构明晰,源码可读可写性好,进而更好的方便了用户的操作及开发人员下一步的开发工作,树型控件和自定义分页技术的使用使得整个系统人机交互性能更为出色。
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Based on the practical work of compiling scheme for water and soil protection, classification on soil pita and residue pita were made out. For soil pits, there were three categories: soil digging along contour line, soil digging at slope without striding over ridge, soil digging at slope bestriding ridge; and the residue pits were classified into four categories: low-lying, ditch, slope and flat pit.
根据我们编制水土保持方案的工作实践,对借土场和弃渣场分别进行了分类:借土场可分为沿等高线借土、不跨山脊坡面借土和跨山脊坡面借土三大类;弃渣可分为填洼弃渣、沟道弃渣、坡面弃渣和平地弃渣四大类。
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To avoid the collision accidents of ships at sea, with the universalizing and application of computer, and the development and maturity of the technology of Expert System and Artificial Intelligent, this paper developed an intelligent collision avoidance expert system for navigation. The main research work centers on several aspects, which will be represented as below:By the navigation rules" understanding and analyzing, and by the navigation experience and navigation samples" collecting and trimming, we put forth and build a multi-unit and layering KB systematic structure, and implement the KBM. According to features of different knowledge, we adopt multifarious KR, such as: frame KR, production rule KR, procedure KR. We also build a multi-inference system, which based on analog inference, forward illation inference, conversion inference and meta-rule inference. At the same time, we develop each reasoning algorithm. For some problems in collision avoidance region during the building of the expert system, we put forth and build a set of models to solve them using neural network technology.
为了避免船舶间碰撞事故的发生,结合计算机技术在各类船舶中的普及与应用、专家系统技术及人工智能技术的发展、成熟,本文研制、开发了一种具有一定智能的航海避碰专家系统,主要内容包括以下几个方面:通过对航海规则的理解与分析,对航海经验、航海实例的搜集、整理,提出并建立起了航海避碰专家系统的多元分层知识库体系结构,并实现了知识库的管理;根据不同知识的特点,分别采用了框架、产生式规则、过程等多种知识表示方法;提出了一种基于类比推理、正向演绎推理、换位推理及元级推理等的多种推理机制,并建立起了相应的推理算法;引入神经网络技术,针对在建立专家系统过程中所遇到的有关避碰领域内的一些难题,提出并建立了相应解决问题的模型,其中包括:船舶类型的识别,会遇态势的分类及避碰危险的评估。
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Hence , this article' s background is the western important item of natural foundation " Great Roadway Engineering of Western Mountain and Environment Mutual Action mechanism " and " Xi Pan Highway Geology Disaster Research and Countermeasure "; on the base of widely consulting on the national and abroad literature datum base ; investigating the slope on the Xi Pan highway; discussing some problem of the slope engineering on the Xi Pan highway Based on centrifugal model experiment , What it is to the slope whittles that the slope places the terrace fills the earth counter pressure the this two kinds of prevention and cure steps of engineering has been underway researching initially , main work and fruit as follows :(1) Based on the impersonal sum-up and comparison of all kinds of methods of analysis about slope stability at present, the current research is introduced and the developing trend is discussed in brief.
基于离心模型试验,对削坡放平台、填土反压这两种工程防治措施进行了初步研究,主要的工作和成果如下:(1)在客观总结目前国内外边坡稳定性分析方法的基础上,对国内外边坡研究现状进行简介,对边坡的稳定性分析方法进行了总结、对比。
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To Oct. Leaders and teachers from AQSIQ, MOFCOM, Ministry of Foreign Affair and Party School of Guangdong CCP committee will be invited. Professional experts, scholars with good English communicative skills will teach at the workshop. There will be 14 lectures including: Fundamental Realities of China, Commerce in China, China's Reform and Opening, Chinese Foreign Relations, Decision Mechanism, Administration Capacity Building, Cost Control, Kimberley Process Certification Scheme Requirements in Detail, Entry-Exit Surveillance and Risk Assessment, Internal Surveillance and Work Guide System Building, The Application of Network Administration System in Kimberley Process, Kimberley Process Certification Scheme Operational Management Website Practice, Rough Diamond Trade and Processing Control Practice, Rough Diamond Inspection Technology; 3 on-site practice courses include: Port Administration Practice, Computer Operating System, Commonly Used Office Software and Internet Practice, and Rough Diamond Inspection Practice; 3 on-site investigation tours include: Business in Cosmopolitan City Guangzhou, Diamond Import-Export and Processing Enterprises Supervision, and Trade Supervision at Shanghai Diamond Exchange.
本次研修班的主要内容如下:研修班共安排十四项专题讲座,讲座题目分别是中国的基本国情、中国的商务工作、中国的改革开放、中国的对外关系、决策机制、执政能力建设、成本控制、金伯利进程证书制度要求详述、进出口监管与风险评估、内部监控及工作导则体系建设、网络管理系统在金伯利进程工作中的应用、金伯利进程证书制度业务管理网站实务、毛坯钻石贸易及加工监管实务和毛坯钻石查验技术方法,将邀请国家质检总局、商务部、外交部的领导以及广东省委党校的老师,同时选派和聘请多名专业水平高,具备外语沟通能力的专家、学者为学员授课。
- 推荐网络例句
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I didn't watch TV last night, because it .
昨晚我没有看电视,因为电视机坏了。
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Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.
今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。
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I'm running my simile to an extreme.
我比喻得过头了。