检索结果-南通市图书馆

A MAXIMUM ENTROPY CHUNKING MODEL WITH N-FOLD TEMPLATE CORRECTION

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Electronics(China) 2007年第5期24卷 690-695页

作者： sun guanglu Guan Yi Wang Xiaolong Ministry of Education-Microsoft Key Laboratory of Natural Language Processing and Speech School of Computer Science and Technology Harbin Institute of Technology Harbin 150001 China

This letter presents a new chunking method based on Maximum Entropy (ME) model with N-fold template correction *** two types of machine learning models are *** on the analysis of the two models,then the chunking model which combines the profits of conditional probability model and rule based model is *** selection of features and rule templates in the chunking model is *** results for the CoNLL-2000 corpus show that this approach achieves impressive accuracy in terms of the F-score:92.93%.Compared with the ME model and ME Markov model,the new chunking model achieves better performance.

关键词： Chunking Maximum Entropy (ME) model Template correction Cross-validation

维普期刊数据库

Training Mode of Personnel Majoring in Network Engineering Based on Three Main Lines

在线全文

学校读者我要写书评

暂无评论

国际计算机前沿大会会议论文集 2016年第2期 33-34页

作者： Hongzhuo Qi guanglu sun Zhiyong Luo School of Computer Science and Technology Harbin University of Science and TechnologyHarbin 150080HeilongjiangChina

Network engineering is an emerging major across many disciplines,so there is yet to be an established personnel training program for this ***,there is a lack of reference material concerning personnel ***,it is especially urgent to explore a model suitable for personnel training in network engineering and study relevant personnel training *** this paper,the present situation of network engineering personnel training in China is analyzed,and basic orientation and training targets of network engineering major are *** find that network engineering personnel training is based on three main combinations:theory and practice,learning and innovation under the social computing environment,and classroom and employment experience,thereby providing constructive experience for training high-quality personnel specializing in network engineering.

关键词： Network engineering Personnel training Social computing Teaching practice

Spam Filtering:Online Naive Bayes Based on TONE

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ZTE Communications 2013年第2期11卷 51-54页

作者： guanglu sun Hongyue sun Yingcai Ma Yuewu Shen Research Institute of Information Technology Tsinghua University ZTE Corporation School of Computer Science and Technology Harbin University of Science and Technology

The naive, Bayes （NB） model has been successfully used to tackle spare, and is very accurate. However, there is still room for improwment. We use a train on or near error （TONE） method in online NB to enhance the perfornmnee of NB and reduce the number of training emails. We conducted an experiment to determine the performanee of the improved algorithm by plotting （I-ROCA）% curves. The resuhs show that the proposed method improves the performanee of original NB.

关键词： spare fihering online naive Bayes train-on or near error

维普期刊数据库

Computer English Acquisition Environment Construction Based on Question Answering Technology Based on Question Answering Technology

在线全文

学校读者我要写书评

暂无评论

国际计算机前沿大会会议论文集 2016年第2期 3-5页

作者： Fei Lang Peipei Li Jian Kang guanglu sun School of Foreign Languages Harbin University of Science and TechnologyHarbinHeilongjiangChina Beijing Institute of Astronautical Systems Engineering BeijingChina School of Computer Science and Technology Harbin University of Science and TechnologyHarbinHeilongjiangChina

In-depth vocabulary knowledge plays a key role in L2(second language)vocabulary acquisition,and computer English vocabulary is vital to academic performances of students majored in Computer *** many Chinese students cannot realize computer English vocabulary acquisition due to lacking input environment of computer *** solve this problem,with techniques of keyword search,information retrieval,and text classification,to meet the diverse learning needs of students,it built the in-depth computer English vocabulary knowledge acquisition environment for the high frequency of computer English words,providing the depth of knowledge such as polysemy,synonyms,syntax,and *** construction of in-depth computer English vocabulary acquisition environment helps future studies on computer English teaching applications.

关键词： Computer English In-depth vocabulary knowledge Information retrieval Text classification

Computer English Teaching Based on WeChat

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

国际计算机前沿大会会议论文集 2016年第2期 6-7页

作者： Fei Lang Kexin Zhang Peipei Li guanglu sun School of Foreign Languages Harbin University of Science and TechnologyHarbinHeilongjiangChina School of Computer Science and Technology Harbin University of Science and TechnologyHarbinHeilongjiangChina

Computer English plays a vital role in academic study for students majored in Computer *** the fast development of information technology,traditional English teaching methods cannot meet students’learning *** is the most popular mobile application of social networks in *** features of real-time communication,interactivity and utilization of fragmentary time attract educators’attention to its application in *** paper carried out an empirical study to explore applying WeChat in Computer English *** WeChat,an English interaction environment was built,and interactive learning activities were *** experimental results show teaching based on WeChat is effective to improve students’Computer English skills.

关键词： Computer English WeChat Social networks English teaching

Projecting Distortion Calibration and Evaluation of Coding Fringes in Structured Light System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

国际计算机前沿大会会议论文集 2016年第1期 139-140页

作者： Haibin Wu Qing Xu Xi Wu guanglu sun Xiaoyang Yu Xiaoming sun The Higher Educational Key Laboratory for Measuring and Control Technology and Instrumentations of Heilongjiang Province Harbin University of Science and TechnologyHarbin150080China

Coded structured light is an accurate, fast 3D measurement approach with high sampling density, of which the encoded fringes are distorted when projected to curved surface. Focused on the demand of encoding, decoding, multiview registration and system calibration, we expect to obtain undistorted fringes from camera image. Therefore, in this paper, we analyze the accuracy and sampling density of projecting distortion calibration approach based on control point and fitting surface. Moreover, combining the characteristic of coded structured light system, we design encoded fringe projecting distortion calibration scheme based on simplified encoded structured light model. Primarily, we neglect the minor parameters that affect the calibration in structured light model to reduce complexity. Then, we build the correspondence between camera image points and projector image points and achieve the calibration. Finally, we design evaluation scheme of projecting distortion calibration with parallelism and equal interval, and verify the effectiveness and accuracy of the approach through visual effect and experimental data.

关键词： Coded structured light Projecting distortion Geometric calibration Encoded fringe

A Novel Filtering Method for Infrared Image

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

国际计算机前沿大会会议论文集 2016年第1期 15-16页

作者： Jian Kang Chunxiao Zhou Weiqiang Xia Chaopeng Shen guanglu sun Beijing Institute of Astronautical Systems Engineering BeijingChina School of Computer Science and Technology Harbin University of Science and TechnologyHarbinHeilongjiangChina

The image filtering technology is widely used in many fields, such as environmental monitoring and assessment, space remote sensing, recognition and tracking of infrared target. In this paper, aiming at the problem of poor generalization capability and over-fitting with artificial neutral network for infrared image filtering, a new filtering method is presented. The structure elements are used to set up the training samples. And then, based on support vector machine theory, it builds the learning ma-chine with proper model and trains the samples. The result can be used to suppress the background SNR of following image. The experimental result with infrared image shows that the method can obtain higher SNR than conventional neutral network and fixed Top-Hat operator method, especially in low SNR.

关键词： Image filtering Neutral network Support vector machine Top-Hat operator

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

满足本地差分隐私的分类变换扰动机制

计算机研究与发展 2022年第2期59卷 430-439页

作者：朱素霞王蕾孙广路哈尔滨理工大学计算机科学与技术学院哈尔滨150080 哈尔滨理工大学信息安全与智能技术研究中心哈尔滨150080

本地差分隐私作为一种隐私保护技术,被广泛用于连续数值型数据的均值估计,使用的扰动机制将直接影响均值的准确度.为进一步提高均值估计的准确性,提出了一种满足差分隐私的分类变换扰动机制.该机制对连续数值型数据划分变换范围并进行分... 详细信息

本地差分隐私作为一种隐私保护技术,被广泛用于连续数值型数据的均值估计,使用的扰动机制将直接影响均值的准确度.为进一步提高均值估计的准确性,提出了一种满足差分隐私的分类变换扰动机制.该机制对连续数值型数据划分变换范围并进行分段,根据分段将其变换为1维二元分类数据.转换后使用随机响应机制进行扰动,再根据扰动后的数据标识的数值段从中随机均匀抽取数值作为扰动值.在真实数据和合成数据中的均值估计实验结果表明该机制极大地提高了准确性.除此之外,将分类变换扰动机制用于构建满足本地差分隐私的小批量梯度下降算法,并完成线性回归学习任务,实验结果证明该方法同样优于其他已有机制,可得到更小的均方误差.

关键词：本地差分隐私数据转换均值估计小批量梯度下降随机响应

维普期刊数据库

Traffic Collection and Analysis System

在线全文

学校读者我要写书评

暂无评论

国际计算机前沿大会会议论文集 2016年第2期 67-69页

作者： Jinlai Liu Haitao Wen Xiangyu Hou guanglu sun Suxia Zhu School of Computer Science and Technology Research Center of Information Security and Intelligent TechnologyHarbin University of Science and TechnologyHarbinChina

This paper designs and implements a network traffic collection and analysis system(NTCA).Network traffic is collected from multiple *** to the offline traffic analysis,network flows are analyzed and annotated with application *** the same time,the results are stored in the *** also provides a visual interface to simplify the configuration *** good flexibility and scalability,NTCA can be extended to a network traffic clas sification system,which is crucial to the research of network security technology.

关键词： Traffic classification Traffic collection and analysis Feature extraction Traffic annotation