查询词典 search

The system parameters are determined by optimizing an output-error cost function. To deal with the non-uniqueness of the fully parameterized state-space system, a projected gradient search algorithm is presented by restricting the update of the parameters to the tangent space to the manifold of observationally equivalent state-space systems. The sufficient condition to employ L-M algorithm for optimizing parameters is also introduced. The proposed hierarchical optimization identificationmethod includes two steps: First, the parameter search direction is determined by the proposed adaptive L-M projected gradient approach; Second, the optimum step size is computed according to a line search method.

通过极小化输出误差目标函数获得了系统参数估计；提出了正交梯度搜索方法用于解决系统参数的非唯一性问题，正交梯度搜索的本质是在输入-输出等价类相切平面的正交垂空间更新系统参数；给出了用 L-M 算法进行参数优化的充分条件；提出的系统参数递阶优化辨识方法包括两步：首先用给出的自适应 L-M 算子正交梯度方法确定参数优化方向；其次由一维搜索方法计算最佳步长。

Perpendicular search engine is to pour pyramid model, be pair of trade news comb, rework and editor are arranged, it is the professional search engine that is aimed at certain industry, the fractionize that is search engine and outspread, it is right some kind of technical information in webpage library undertakes conformity, directional cent field is draw-out the user is returned with some kind of form again after the data that gives need undertakes handling.

垂直搜索引擎是倒金字塔型，是对行业信息的梳理、再加工与编辑整理，是针对某一个行业的专业搜索引擎，是搜索引擎的细分和延伸，是对网页库中的某类专门的信息进行一次整合，定向分字段抽取出需要的数据进行处理后再以某种形式返回给用户。

The Establishment and Application of Evaluation Criteria System for Search Engines Zhu Qinghua and Du Jia ( Department of Information Management, Nanjing University, Nanjing 210093)According to the features of search engines, this paper establishes a set of evaluation criteria system for search engines by using Delphi Method online, and calculates the weight of these evaluation criteria by Analytic Hierarchy Process based on exponential scale.

本文结合搜索引擎的特点，采用网上特尔菲法进行专家调查以确定搜索引擎评价的各项指标，并利用基于指数标度的层次分析法确定各项指标的权重，从而构建搜索引擎评价指标体系。

The half scenery search method and the maximum superiority search method developed for searching ideal AND/OR graphs can be extended to searching ideal non-AND/OR graphs containing SUB and COM operators, and the maximum reliability search method for searching ideal AND/OR graphs is applicable to the non-ideal AND/OR graphs containing circuit structures.

建立在理想AND/OR图上的半景搜索法和最大优势搜索法可以推广到包含SUB和COM算子的理想非AND/OR图的搜索，而最大超越搜索法则可推广到包含回路结构的非理想AND/OR图的搜索。

SEARCH: Both full-text search engines and ones that search descriptions of documents and other content.

搜索层：全文搜索引擎和搜索文档描述和其他内容的搜索引擎。

Xinhua net Beijing on March 3 report with the whole world the keyword of Baidu of the biggest engine of Internet Chinese search is a foundation, handpick topic of 135 networks heat, the large series books of meaning of net of netizen of comprehensive and live record " search 2009 " copy " search 2009 · 01 ", already finished by editor of society of almanac of People's Republic of China a few days ago, you Xinhua press faces the whole nation to publish.

新华网北京3月3日电以全球最大的互联网中文搜索引擎百度的关键词为基础，精选135个网络热点话题，全面而生动记录网民网意的大型系列图书《搜索2009》的第一册《搜索2009·01》，日前已由中华人民共和国年鉴社编辑完成，由新华出版社面向全国出版发行。

In that universe, if you search on any search engine for that search engine's name, the universe does implode!

在那个宇宙中，如果你在任何搜索引擎中搜索该引擎的名字，那么这个宇宙就会爆炸。

Watch original gregarious network, be more the user the circle is here, resemble each tremendous Gu island, it is inchoative open platform with Facebook nevertheless, effective realized a crowd distribute and flow, compose built a network application ecosystem that is a center with oneself, this ecosystem is the challenge of central ecosystem to be increased slowly to the search, those search firms that destroy search ecosystem should be careful particularly.

观察原来的社交网络，是更多的将用户圈在自己这里，像一个个巨大的孤岛，不过以Facebook为发端的开放平台，则有效的实现了人群的分发和流动，构建了一个以自己为中心的网络应用生态系统，这个生态系统对搜索为中心的生态系统的挑战慢慢加大，那些破坏搜索生态系统的搜索公司要非凡的当心了。

Finally, it analyses the time complexity of the algorithm and researches how it is influenced by culture operator.3、The paper presents the evaluation standard of the GA's application capability. Basing on characters such as continuity, multi-peak, vibration, randomicity as well as large-scale, five functions are selected to test search ability and robustcity of co-evolution algorithm. Finally, it analyses the simulation result and researches the influence of algorithm brought by culture operators.4、Basing on the concept of collection overcast, it researches the task distribution issue and constitutes delaminated math model on task distribution issue. It puts out the co-evolution algorithm of subtask's decomposing. The experiment compare IGA、SGA to CN and validates the efficiency of co-evolution algorithm on the NP completeness issue.5、Being aim at the optimization issue of load of antenna near ground, it combines many GA strategies and puts forward strategic meme. And it puts out co-evolution algorithm of load of antenna design. And it emulates the optimization design of load of antenna near ground. Finally, it valuates the co-evolution algorithm's efficiency on the continuum search issues of multi-variable and multi-peak value.6、Being aiming at the knowledge of image model matching, it adopts single meme and real code. It puts out fast co-evolution matching algorithm strategy. Basing on NPROD resemble measurement, I emulate the indiscrimination model matching and discrimination model matching. Finally, it valuates the co-evolution algorithm's efficiency on the real code and real time search issue.

分析了算法的时间复杂度，研究了文化算子对算法时间复杂度的影响。3、提出了GA的应用性能评价标准，从连续性、多峰性、随机性、振荡性、广域性多个角度出发选择五个测试函数，对共同进化算法的搜索性能和鲁棒性作了函数优化的性能测试，分析了仿真结果，研究了文化算子对算法的影响。4、基于集覆盖的概念，研究了MAS中的任务分配问题，建立了任务分配问题的分层数学模型，给出了子任务分解共同进化算法，实验比较了IGA、SGA、CN，验证了共同进化算法对NP完全问题的有效性。5、针对近地天线加载优化设计问题，结合多种改进GA策略，提出了策略型拟子，给出天线加载设计的共同进化算法，对有耗半空间对称偶极子天线加载优化设计作了仿真实验，验证了共同进化算法对多变量多峰连续搜索问题上的有效性。6、针对图像模板匹配问题的领域知识，采用单类拟子和实数编码，给出快速共同进化匹配算法策略，基于NPROD相似度测度，仿真试验了无差别和有差别模板匹配，验证了共同进化算法对实数编码和实时性搜索问题上的有效性。

Another student had very definite ideas about search engines and their attributes. He explained that Yahoo!, for example, is for entertainment and Magellan or InfoSeek arefor more scientific material. When searching, he mentioned a couple of times that he could choose another engine, but in reality he always used the search button without selecting a search engine.

另外一个学生对於搜寻引擎有非常清楚的主意，他解释关於雅虎，举例来说：它可以提供足够的资料在Magellan or InfoSeek，当搜寻的时候，他提及很多的时间，他能够选择另外的引擎，但是实际上他总是使用使用搜寻的按钮而没有使用选择一个搜寻引擎。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。