期刊：
PROCEEDINGS OF THE 2017 7TH INTERNATIONAL CONFERENCE ON MECHATRONICS, COMPUTER AND EDUCATION INFORMATIONIZATION (MCEI 2017),2017年75:467-470 ISSN：2352-538X
通讯作者：
Yuan, Cao
作者机构：
[Sun, Jianchi; Yuan, Cao] Wuhan Polytech Univ, Sch Math & Comp Sci, Wuhan, Hubei, Peoples R China.
通讯机构：
[Yuan, Cao] W;Wuhan Polytech Univ, Sch Math & Comp Sci, Wuhan, Hubei, Peoples R China.
会议名称：
7th International Conference on Mechatronics, Computer and Education Informationization (MCEI)
会议时间：
NOV 03-05, 2017
会议地点：
Shenyang, PEOPLES R CHINA
会议主办单位：
[Sun, Jianchi;Yuan, Cao] Wuhan Polytech Univ, Sch Math & Comp Sci, Wuhan, Hubei, Peoples R China.
会议论文集名称：
ACSR-Advances in Comptuer Science Research
关键词：
Feature extraction;Cotton leaf;Analyze and compare;Operator
摘要：
Cotton is the main plant of braided fabric in China, the production of cotton planting is important, but cotton are caused by diseases and insect pests easily in planting, so in the process of farming, some useful information of cotton diseases should be achieved easily and can be analyzed effectively, so some accurate and effective actions can be done. In the paper, cotton leaf as the research object, the main diseases are introduced, how to detect the main diseases is the important step in modern agricultural digital technology. In the paper, cotton leaf as the object of research, the main features of apple leafs should be reserved, and the special features of the disease region in apple leaf should be emphasized effective. The novel algorithm based on color components and edge extraction algorithms. More than 500 results of main cotton image with the main diseases can be compared by main operator algorithms and color components, analyze the results of different cotton diseases and operators, the new algorithm based on color difference and morphological features be precedence than other algorithms in the main cotton diseases.
关键词：
Privacy preserving;Differential privacy;Topic model;Recommender system;Tagging system
摘要：
Tagging recommender systems provide users the freedom to explore tags and obtain recommendations. The releasing and sharing of these tagging datasets will accelerate both commercial and research work on recommender systems. However, releasing the original tagging datasets is usually confronted with serious privacy concerns, because adversaries may re-identify a user and her/his sensitive information from tagging datasets with only a little background information. Recently, several privacy techniques have been proposed to address the problem, but most of these lack a strict privacy notion, and rarely prevent individuals being re-identified from the dataset. This paper proposes a privacy- preserving tag release algorithm, PriTop. This algorithm is designed to satisfy differential privacy, a strict privacy notion with the goal of protecting users in a tagging dataset. The proposed PriTop algorithm includes three privacy-preserving operations: Private topic model generation structures the uncontrolled tags; private weight perturbation adds Laplace noise into the weights to hide the numbers of tags; while private tag selection finally finds the most suitable replacement tags for the original tags, so the exact tags can be hidden. We present extensive experimental results on four real-world datasets, Delicious, MovieLens, Last.fm and BibSonomy. While the recommendation algorithm is successful in all the cases, our results further suggest the proposed PriTop algorithm can successfully retain the utility of the datasets while preserving privacy.
作者机构：
[Li, Yaqin; Gong, Cheng; Yuan, Cao] Wuhan Polytech Univ, Sch Math & Comp Sci, Wuhan, Peoples R China.
会议名称：
6th International Conference on Electronic, Mechanical, Information and Management Society (EMIM)
会议时间：
APR 01-03, 2016
会议地点：
Shenyang, PEOPLES R CHINA
会议主办单位：
[Li, Yaqin;Yuan, Cao;Gong, Cheng] Wuhan Polytech Univ, Sch Math & Comp Sci, Wuhan, Peoples R China.
会议论文集名称：
ACSR-Advances in Comptuer Science Research
关键词：
Online-teaching;PCI;FPGA;DSP
摘要：
These online-teaching database systems are generated from online transactions, emails, videos, audios, images. They are stored in databases grow massively and become difficult to capture, form, store, manage, share, analyze and visualize via typical database software tools. The adventure of large amount of data and real-time requirements presents great challenges using traditional desktop computers. In this paper, to tackle the specific problem with a critical requirement of 10ms for whole data processing pipeline, we proposed a high performance embedded system as opposed to personal computer. Peripheral Component Interconnect (PCI) for data transferring from computer to Field Programmable Gate Array (FPGA) is proposed to solve the problem, and a custom-designed dual-port dual-channel RAM to realize simultaneous data exchange and data processing which was implemented using a 6-core Digital Signal Processor (DSP). The hardware system was designed and tested the performance of individual modules as well as the integration of them as a whole. We reported a total time using such pipeline of 7.5ms, meeting the critical requirement and demonstrating its feasibility in practical application.
摘要：
With the development of information and the integration of media, it has great practical significance and research value to build a digital learning environment based on the complicated electronic circuit. However, the complicated electronic circuit in real-time need a complex and expensive technology. In order to overcome the high cost and technology, an approach was proposed for simplifying generation by approximating the excitations with rectangular pulses, triangular pulses and cosine waves which can be implemented with a moderate cost in analogical electronics. In this work, we improved a novel approach based on genetic programming, The differences between theoretical excitation signals and the approximation driving pulses, related to their excitation effects, were minimized by genetic programming. From these results, the accuracy of simulation can be improved by the new approach, the difference between theoretical complicated digital signals and the new approach is reduced. A trade off is obtained between the costs of implementation of digital processing in digital learning environments.
关键词：
teaching evaluation;method of weighted mean;classification
摘要：
The paper selects certain features then classifies students and calculates the average score of each type student, ultimately by means of the method of weighted mean, gives each type of student a certain weight, to process the data of teaching evaluation. Compared with traditional method, the results of above method are closer to teacher's true level, and the data processing is also more scientific and reasonable. This paper also points out the disadvantages of current assessment system and recommends universities can adopt the method of weighted mean to improve the accuracy and effectiveness in current system.
摘要：
A switching median and morphological filter is presented for removing impulse noise. In the proposed filter, the noise detector is first adopted to identify noise pixels by combining the morphological gradient based on the erosion and dilation operators with the top-hat transform. Then the detected impulses are removed by the hybrid filter, which combines the improved median filter using only the noise-free pixels with the conditional morphological filter using the improved morphological operations. Extensive simulations demonstrate that the proposed filter can realize accurate noise detection and it has significantly better restoration performance than a number of decision-based filters at the various noise ratios.
作者：
Zhu, Tianqing;Li, Gang;Zhou, Wanlei;Xiong, Ping;Yuan, Cao
期刊：
Lecture Notes in Computer Science,2014年8443 LNAI(PART 1):557-568 ISSN：0302-9743
通讯作者：
Li, G.(gang.li@deakin.edu.au)
作者机构：
[Zhou, Wanlei; Li, Gang; Yuan, Cao; Zhu, Tianqing; Xiong, Ping] School of Information Technology, Deakin University, Australia;[Zhou, Wanlei; Li, Gang; Yuan, Cao; Zhu, Tianqing; Xiong, Ping] School of Mathematics and Computer, Wuhan Polytechnic University, China;[Zhou, Wanlei; Li, Gang; Yuan, Cao; Zhu, Tianqing; Xiong, Ping] School of Information, Zhongnan University of Economics and Law, China
期刊：
Applied Mechanics and Materials,2013年329:382-386 ISSN：1660-9336
作者机构：
[Li, Ya Qin; Chen, Dan] School of Mathematic and Computer Science, Wuhan Polytechnic University, China;[Yuan, Cao] School of Computer and Software, Wuhan Vocational College of Software and Engineering, China
会议名称：
3rd International Conference on Intelligent Structure and Vibration Control, ISVC 2013
会议时间：
22 March 2013 through 24 March 2013
关键词：
Arbitrary waveform generator;Direct digital synthesizer;Hard system;Limited diffracting wave
摘要：
Let Diag(G) and D(G) be the degree-diagonal matrix and distance matrix of G, respectively. Define the multiplier Diag(G)D(G) as degree distance matrix of G. The degree distance of G is defined as D'(G) = Σ x∈v(G)dG(x)Dg(x), where dg(x) is the degree of vertex x, DG(x) = Σ∈V(G)d G(u,x) and dg(u,x) the distance between u and x. Obviously, D'(G) is also the sum of elements of degree distance matrix Diag(G)D(G) of G. A connected graph G is a cactus if any two of its cycles have at most one common vertex. Let G (n, r) be the set of cacti of order n and with r cycles. In this paper, we give the sharp lower bound of the degree distance of cacti among G (n,r), and characterize the corresponding extremal cactus.
摘要：
The traditional congestion control mechanism of transport control protocol (TCP) has been proved cannot satisfy the wireless scenario. The extensive research has been done to understand the drawback of TCP in wireless networks. In this paper, we proposed a new congestion control algorithms for mobile ad-hoc networks (MANET) at the TCP sender side which efficiently adapts to the maximum transmission rate of a mobile wireless link, the new algorithms follow the idea of FAST TCP which uses delay as congestion measure. However, FAST TCP has limitations when used over a dynamic mobile wireless link with a high frame error ratio (FER) and frequent delay changes due to the variable rate. The new algorithms overcome this shortcoming by improving the congestion signal choice. By using analysis, we proved that the new congestion control mechanism provides superior performance over mobile wireless network environments.
会议论文集名称：
2011 3rd International Conference on Computer Design and Applications(ICCDA 2011)
(2011年第三届计算机设计与应用国际会议)论文集
关键词：
high speed network;TCP;congestion control
摘要：
With the development of optical technology and high performance computing, more and more high-speed network has emerged to support massive scientific data transfer such as High Energy Physics computing. Therefore, it is very important to study the performance of transport control protocol over high speed networks. In this paper, we focus on how to measurement the performance of variant TCP over high speed network.
