In this thesis , attention is concentrated on the english ner . ner is implemented with two methods , which are improved hmm and conditional random field , and the test result is analyzed . first , this thesis identifies the english named entity with improved hmm 分别利用了改进的隐马尔可夫模型( hiddenmarkovmodel , hmm )和条件随机域模型( conditionalrandomfield , crf )两种方法进行英文命名实体的识别,并对实验结果进行了分析。
In order to understand the lamp ' s negative incremental impedance of characteristics and analyze the stability of ballast / lamp system clearly , the low - frequency ballast system stability with closed loop are analyzed based on the hid lamp frequency - domain model in chapter ii 为了更好地理解灯的负阻特性并分析电子镇流器系统的稳定性问题，论文第二章着重从灯的频域模型出发分析了闭环控制下的低频方波电子镇流器系统的稳定性问题。
This thesis also proposes a new methodology named multi - agent oriented analysis and design ( maoad ) based on the conventional agent oriented analysis and design ( aoad ) methodology . in maoad , the phrase domain model is a new and key concept in resolving the multi - domain problem such as virtual enterprise 在传统的面向代理的方法论基础上提出了面向多代理的方法论? maoad ，增加了域模型的核心概念，较好地解决了在虚拟企业应用分析和设计过程中的多域问题。
Combined with my works when participated in the software development of hyoss , the thesis specifies the whole system analysis process , which is directed by the ngoss sam and ngoss theory . the thesis specifies the user management system design process and also gives out other sub - system design processes . on the other hand , the thesis particularly describes the hyoss architecture design , the j2ee technology used in the hyoss development , the design patterns , the struts framework , the development processes in the presentation layers , business logic layer and the data persistence layer , and at last the thesis depicts the development models using ejb 结合本人在实验室参与的hyoss宽带运营支撑系统的项目,本文重点阐述了作者在ngoss理论指导下,按照ngoss系统分析视图sam进行hyoss系统分析和系统设计的全过程,本文强调了系统分析的方法,分析了hyoss运营的商务环境,价值链模型,管理域模型,设计了基于etom模型的商务过程架构,合理划分了hyoss系统功能结构,分析了hyoss的技术实现方式,包括j2ee技术,设计模式, struts框架等。
A preliminary study was carried out on the method of acquiring parameters for soil dual - porosity model and the analysis for the simulation of soil nitrate leaching by dual - porosity model . the feasibility and experimental conditions of soil particle size analyzing by the laser particle - size analysis was discussed , based on the comparison results of nine soil samples by the laser particle - size analysis and traditional pipette and sieve analysis 本文初步探讨了土壤两域模型的参数获取方法及两域模型应用于土壤硝酸盐淋洗的模拟分析，为进一步研究优先流以及分形理论在土壤溶质(包括养分)运移研究中的应用打下基础，以更准确地模拟和预测农田土壤硝酸盐的淋洗，为农田水肥优化措施提供依据。
On the basis of research works related above , an enterprise mhs with good quality of extension and reconstruction is integrated under the direction of design model . this dissertation emphasis on the following aspects : to analysis business processing and capture system demands with use cases . the object - oriented analysis and object - oriented design of the entities in the application domain , the identification of the objects in the application domain and the analysis of the relations of these objects 本文重点进行了以下方面的研究工作：使用用例( usecases )分析业务处理流程，捕获系统需求；用面向对象方法对问题空间中的实体进行分析与抽象，识别出问题域的对象，并分析它们相互之间的关系；研究从对象到关系数据库的映射，用e - r模型进行数据建模、设计物流系统数据库；用uml中类图、对象图、用例图、状态图、顺序图等分别对系统的静态与动态部分建模；运用通用设计模式，建立三级软件体系结构的物流系统模型，将问题域的模型转化为求解域模型；
Based on the fractal character of the small watershed topographic feature , the spatial and temporal variation character of sediment yield of the watershed model , the dynamic developing process and fractal character of the topog raphic feature of the watershed model , and the coupling relationship between the sediment yield and the topographic feature of the watershed model are " studied by simulate experiment , fractal theory , high precise photogrammetry and gis technology . the validation research is conducted in chabagou watershed where the observation data of rainfall , sediment and runoff for 11 years is collected . the study provides new theory and method for the topographic feature quantitative research in the prediction model of small watershed sediment yield 本文依据流域地貌形态所具有的显著分形特征，从模拟实验出发，利用分形理论和方法，结合高精度摄影测量和gis技术，对流域模型侵蚀产沙时空变异特征、地貌形态发育过程及其相应的分形特征、流域模型侵蚀产沙与地貌形态耦合关系进行了深入研究，并以具有11年降雨泥沙径流观测资料的岔巴沟流域为例进行了验证研究，为实现从单坡面侵蚀产沙模拟、预报向流域侵蚀产沙模拟、预报转化过程中地貌形态参数的提取提供了理论和方法，为黄土高原小流域水土流失综合治理提供了科学实践依据。
The paper put forward the model of network security problem domain and analyze the underlying reason of false positive and false negative by using it . at last , the paper bring forward the network security protection architecture based on intrusion detection for a integrated network security cycle 然后，本文提出了网络安全问题域模型，并利用这一模型分析入侵检测系统的误报和漏报产生的根本原因；最后，为构筑完整的网络安全循环，本文提出了建立在入侵检测基础上的网络安全防护体系结构模型。
3 , on the base of the traditional spatial filtering , the author present , a new despeckle algorithm , that make use of iterated processing and correlated neighbourhood model , iterated filtering method of the sar image combining the correlated neighbourhood model with maximum a posteriori filter . first , a series of templates refecting direction information are established and every template is present for a kind of neighbour structure . then on the basis of sar images statistical property , the maximum a posteriori estimate of the real intensity under observation image values is got by bayes formulatio - n 3 、针对传统空间滤波器的不足，引入迭代处理和相关邻域模型的概念，提出了基于相关邻域模型的最大后验迭代滤波。该算法引用一系列反映局部边界特征的邻域模型，以描述图像的细节。引入强度的先验概率分布模型，利用bayes方法，对各个结构进行实际强度的最大后验估计。
