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The 9th international conference on computer and Computing Technologies in Agriculture (CCTA 2015)

作者： Guogang Zhao Haiye Yu Lianjun Yu Guowei Wang Yuanyuan Sui Lei Zhang Linlin Wang Jiao Yang College of Biological and Agricultural Engineering Jilin University Key Laboratory of Bionic Engineering Ministry of Education Changchun City Academy of Agricultural Sciences School of Information Technology Jilin Agricultural University Sixth Middle School in Changchun

ISBN: (纸本)9783319483535

Experimental vegetable production is greatly influenced by many environmental factorsThere is urgent need to supervise its air temperature and humidity, soil temperature and humidity in the facilities information such as realtime monitoring, and timely early warning and control, in case of irreparable damageThis paper adopts the IOT technology to design and develop mobile client system which is used to make warnings and protect vegetables in order to realize real-time monitoring in the process of vegetable production in the aspects of timely warning of environmental information and control.

关键词： Protected vegetables The internet of things Early warning Control system Mobile client terminal

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Heading Control of an AUV Based on Mamdani Fuzzy Inference

Heading Control of an AUV Based on Mamdani Fuzzy Inference

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2015 international conference on Advances in Mechanical Engineering and Industrial Informatics(AMEII 2015)

作者： Zaopeng Dong Lei Wan Tao Liu Jiayuan Zhuang Science and Technology on Autonomous Underwater Vehicle Harbin Engineering University

ISBN: (纸本)9781510806481

A class of autonomous underwater vehicle(AUV) heading control problem is addressed in this paper based on Mamdani Fuzzy Inference(MFI). Firstly, empirical knowledge of heading control for ship from experienced captain is fuzzed into fuzzy control rules, which can be identified by computer, using fuzzy set theory. Secondly, output of the controller is derived by calculating the excitation of system input to the control rules, combing with the application of multi-input-multi-rule MFI. Thirdly, robust adaptive heading controller for AUV is designed incorporating the distributing characteristics of Gaussian membership function, in order to overcome randomness and uncertainty of the external environment disturbances on AUV. At last, simulation experiment is carried out to verify the effectiveness and superiority of the controller designed.

关键词： autonomous underwater vehicle(AUV) heading control fuzzy control technology Mamdani Fuzzy Inference(MFI) Gaussian membership function

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A Data Provenance Model for Collaboration Design Process

A Data Provenance Model for Collaboration Design Process

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international conference on Information sciences,Machinery,Materials and Energy（ICISMME 2015）

作者： Xuan Sun Xin Gao Haiyan Kang Chen Li Beijing Information Science &Technology University The National Computer Network Emergency Response Technical Team Coordination Center of China

Data provenance is the basic metadata for process analysis in process aware system and plays an important role in collaboration design process for process auditing and process improvement,but data collaboration and iterative processin theexecutionof collaboration design process impede the integrity of provenance tracking based on data *** paper proposes a collaborative design provenance model based on OPM,which can support provenance tracking in the execution of multiple related collaboration design *** this model,it descripts the basic characteristic of the execution of collaboration design process,supports the description of iterative process by execution path expansion,and supports the descriptions of different data collaboration patternsbetween different design *** on this model,we finally provide the global data provenance directed graph by the mechanism of data provenance sharing and combination that can insure the integrity of provenance tracking of collaboration design process.

关键词： data provenance collaboration design process

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Qos based data access control method in the campus cloud storage system

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2012 international conference on Cybernetics and Informatics, ICCI 2012

作者： Ye, Yanming M. Feng, Zhilin L. Ding, Hong College of Software Technology Hangzhou Dianzi University Hangzhou China College of Zhijiang Zhejiang University of Technology Hangzhou China College of Software Technology Hangzhou Dianzi University Hangzhou China College of Computer Science Zhejiang University Hangzhou China

ISBN: (纸本)9781461438717

Quality of service (QoS) is an essential aspect of any large storage system. In cloud computing, all tenants’ data and software are stored in the clouds and therefore the data access control and QoS assurance is the key problem needed to be considered. This paper begins with the study on the QoS assurance method, and after analyzing the performance of the distributed storage system, the paper proposes a QoS assurance method for the storage service in our campus cloud. The experiment results show that the method can balance all the requests and provide QoS satisfied storage services for as many users as needed. © Springer science+Business Media New York 2014.

关键词： Quality of service

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Combining heterogeneous data sources for civil unrest forecasting

Combining heterogeneous data sources for civil unrest foreca...

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international conference on Advances in Social Network Analysis and Mining, ASONAM

作者： Gizem Korkmaz Jose Cadena Chris J. Kuhlman Achla Marathe Anil Vullikanti Naren Ramakrishnan Virginia Tech Virginia Bioinformatics Institute Blacksburg VA USA Department of Computer Science Virginia Tech Blacksburg VA USA

Detecting and forecasting civil unrest events (protests, strikes, etc.) is of key interest to social scientists and policy makers because these events can lead to significant societal and cultural changes. We analyze protest dynamics in six countries of Latin America on a daily level, from November 2012 through August 2014, using multiple data sources that capture social, political and economic contexts within which civil unrest occurs. We use logistic regression models with Lasso to select a sparse feature set from our diverse datasets, in order to predict the probability of occurrence of civil unrest events in these countries. The models contain predictors extracted from social media sites (Twitter and blogs) and news sources, in addition to volume of requests to Tor, a widely-used anonymity network. Two political event databases and country-specific exchange rates are also used. Our forecasting models are evaluated using a Gold Standard Report (GSR), which is compiled by an independent group of social scientists and experts on Latin America. The experimental results, measured by F1-scores, are in the range 0.68 to 0.95, and demonstrate the efficacy of using a multi-source approach for predicting civil unrest. Case studies illustrate the insights into unrest events that are obtained with our methods.

关键词： Media Predictive models Twitter Biological system modeling Blogs Forecasting Data models

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Nonovershooting Position Control for Unidirectional Proportional Pump Controlled Asymmetric Cylinder with Proportional Controller

Nonovershooting Position Control for Unidirectional Proporti...

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2015 international conference on Fluid Power and Mechatronics

作者： Jian-feng Tao Liu-qing Yang Xuan Wang Feng-rong Zhang School of Mechanical Engineering Shanghai Jiao-tong University Department of Computer Science and Technology School of the Electronic and Information EngineeringXi'an Jiaotong University

Unidirectional proportional pump-controlled asymmetric cylinder systems are widely used on industry machines,but the analysis and synthesis of such systems is very hard due to the nonlinearity caused by the different working areas of cylinder piston. The one-way flow control ability of the unidirectional proportional pump makes the problem more complex. To realize the nonovershooting position control and simplify the system analysis and synthesis, this paper presented a third order mathematic model to depict the dynamic behavior of the unidirectional proportional pump-controlled asymmetric cylinder. A specially designed proportional controller is used to guarantee that the step response of the system is nonovershooting, and that the system performance can be analyzed with the classic linear control theory. Based on the condition of stability, the index of stable error and the condition of the third order system ' s nonovershooting step response, a numerical algorithm for nonovershooting proportional gain determining is given. The experiments are carried out, and the results show that the proposed method is valid.

关键词： unidirectional proportional pump,asymmetric cylinder,proportional controller,nonovershooting

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Application Feasibility Analysis of Precision Agriculture in Equipment for Controlled Traf fic Farming system:A Review

Application Feasibility Analysis of Precision Agriculture in...

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The 9th international conference on computer and Computing Technologies in Agriculture (CCTA 2015)

作者： Caiyun Lu Zhijun Meng Xiu Wang Guangwei Wu Nana Gao Jianjun Dong Beijing Research Center of Intelligent Equipment for Agriculture Beijing Academy of Agriculture and Forestry Sciences National Research Center of Intelligent Equipment for Agriculture Beijing Key Laboratory of Intelligent Agricultural Equipment and Technology Key Laboratory of Agri-Informatics Ministry of Agriculture Beijing Research Center for Information Technology in Agriculture

ISBN: (纸本)9783319483566

Equipment includes planter, field management equipment and harvester for controlled traffic farming system is elaborated in the paper. And the analysis results shows that main problems of equipment for controlled traffic farming system contains poor ability to navigate, uneven and bent wheel *** solve the problem, the thought that precision agriculture is introduced into equipment for controlled traffic farming system is put forward. For this purpose,the key technology of precision agriculture is introduced, and the feasibility of combination of precision agriculture and controlled traffic farming system is discussed, which provides theoretical support for the development of equipment for controlled traffic farming system.

关键词： Controlled traffic farming system Equipment Precision agriculture precision agriculture EQUIPMENT farming system Traffic Standing Orders

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Architecture Design for service Network Deployment, Customization and Execution

Architecture Design for Service Network Deployment, Customiz...

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international conference on service sciences (ICSS)

作者： Yu, Meng Wang, Zhongjie Wang, Shaopeng Xu, Xiaofei Harbin Inst Technol Sch Comp Sci & Technol Harbin 150006 Peoples R China

ISBN: (纸本)9781479943326

service Network (SN) is a feasible approach to deal with mass personalized customer requirements in a cost-effective way. The SN philosophy has been widely applied in various service domains, such as e-Business, online travel services, bioinformatics, etc. Being a persistent service infrastructure, SN requires a run-time environment which enables its deployment, customization and execution. This paper shows an architecture design for such kind of environment. The conceptual model of SN is firstly introduced, and then the high-level system architecture is put forward, including a deployment engine (SDE), a customization engine (SCE), an execution engine (SEE), and a set of repositories storing necessary data during the lifecycle of an SN. Particularly, three mechanisms facilitating the execution of a customized SN are proposed, i.e., BPEL-based, Rule-based and Event-based ones, and a brief comparison between them is conducted. The proposed architecture enables the deployment and execution of SN across boundaries of different clouds where the constituent services of the SN are deployed and executed.

关键词： service network deployment customization execution run-time environment

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Self-adaptive service deployment in context-aware systems

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Lecture Notes in computer science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2014年 8867卷 259-262页

作者： Guerrero-Contreras, Gabriel Garrido, José Luis Rodríguez-Domínguez, Carlos Balderas-Díaz, Sara University of Granada Software Engineering Department E.T.S.I.I.T C/ Periodista Daniel Saucedo Aranda s/n Granada Spain

ISBN: (纸本)9783319131016

Ubiquitous environments present a dynamic network topology which implies frequent context changes which can affect the availability of the services deployed in the system. In order to obtain the full potential that this kind of environments can provide to assist human beings, this challenge must be faced. service replication models in combination with self-adaptive capabilities may help to improve service availability and strengthen the system. In this work, it is presented a conceptual model to support a run-time service deployment taking into consideration relevant context information, such as resource availability, network topology and service requirements. © Springer international Publishing Switzerland 2014.

关键词： Network topology

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On detection of bitcoin mining redirection attacks

On detection of bitcoin mining redirection attacks

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international conference on Information systems Security and Privacy (ICISSP)

作者： Nicolas T. Courtois Pinar Emirdag Zhouyixing Wang Computer Science University College London London U.K Independent Market Structure Professional London U.K

In this paper we study the question of centralisation in bitcoin digital currency. In theory bitcoin has been designed to be a totally decentralized distributed system. Satoshi Nakamoto has very clearly postulated that each node should be collecting recent transactions and trying to create new blocks (Satoshi08). In bitcoin transactions are aggregated in block in order to authenticate them and form an official ledger and history of bitcoin transactions. In practice as soon as expensive ASIC bitcoin miners have replaced general-purpose hardware, production of bitcoins and the validation of transactions has concentrated in the hands of a smaller group of people. Then at some moment in early 2012 an important decision was taken: the Stratum protocol was designed (Palatinus12) which took a deliberate decision to move the power of selecting which transactions are included in blocks from miners to pool managers. The growing difficulty of mining and large standard deviation in this process (Rosenfeld13; CourtoisBahack14) made that majority of miners naturally shifted to pooled mining. At this moment bitcoin ceased being a decentralized democratic system. In this paper we survey the question of a 51% attacks and show that there is a large variety of plausible attack scenarios. In particular we study one particularly subversive attack scenario which depends on non-trivial internal details of the bitcoin hashing process. How does it compare with the current mining practices? We have study the Stratum protocol in four popular real-life mining configurations. Our analysis shows that pools could very easily cheat the majority of people. However the most subversive versions of the attack are NOT facilitated and could potentially be detected.

关键词： Online banking Cryptography Protocols History Peer-to-peer computing Switches

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