Security is an important issue in the field of wireless communication. In this paper, the security problem of Single-input Single-output Multiple-helpers (SISOMH) wireless channel is considered. The SISOMH wireless channel, where artificial noise is utilized, is designed to prevent eavesdropping. But the artificial noise may be invalid due to the inherent security weakness. We point out that the SISOMH scheme is not safe through by matrix analysis. Then, a Helper Transmission Parameter Optimization (HTPO) scheme is proposed to fix the flow.
{"title":"Security in Single-Input Single-Output Multiple-helpers Wireless Channel","authors":"Xiao Chen, Yan Zhu, Zhi Xue, Fangbiao Li, Jie Gu","doi":"10.1109/ICCIS.2012.275","DOIUrl":"https://doi.org/10.1109/ICCIS.2012.275","url":null,"abstract":"Security is an important issue in the field of wireless communication. In this paper, the security problem of Single-input Single-output Multiple-helpers (SISOMH) wireless channel is considered. The SISOMH wireless channel, where artificial noise is utilized, is designed to prevent eavesdropping. But the artificial noise may be invalid due to the inherent security weakness. We point out that the SISOMH scheme is not safe through by matrix analysis. Then, a Helper Transmission Parameter Optimization (HTPO) scheme is proposed to fix the flow.","PeriodicalId":269967,"journal":{"name":"2012 Fourth International Conference on Computational and Information Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133406179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The expansion force is one of the key parameters in Expansion Casing Technology. The expansion force is very difficulty to calculate by conventional methods because the expansion process of expansion casing is complex nonlinear elastic-plastic deforming. In this paper, the mechanical model of expansion casing is established by using of the main stress method, and the expansion force is calculated. The results provide theoretical grounds for the process design of the expansion casing technology.
{"title":"Calculation of Expansion Force for Expansion Casing","authors":"Yang Bin","doi":"10.1109/ICCIS.2012.98","DOIUrl":"https://doi.org/10.1109/ICCIS.2012.98","url":null,"abstract":"The expansion force is one of the key parameters in Expansion Casing Technology. The expansion force is very difficulty to calculate by conventional methods because the expansion process of expansion casing is complex nonlinear elastic-plastic deforming. In this paper, the mechanical model of expansion casing is established by using of the main stress method, and the expansion force is calculated. The results provide theoretical grounds for the process design of the expansion casing technology.","PeriodicalId":269967,"journal":{"name":"2012 Fourth International Conference on Computational and Information Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131690061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Texture and edge information are equally important to identification of most of natural images. In view of the weakness of the existing integer order differential operators that it can't extract texture information from the images, this study developed a fractional differential algorithm, which can extract texture and marginal information simultaneously, based on settlement of the drift problem of fractional differential operator. Experimental results showed that our algorithm can not only extract texture information but also extract more edge information than the traditional algorithms.
{"title":"The Improved Fractional Order Differential Image Information Extraction Algorithm","authors":"Mingliang Hou, Yuran Liu, Yanglie Fu","doi":"10.1109/ICCIS.2012.330","DOIUrl":"https://doi.org/10.1109/ICCIS.2012.330","url":null,"abstract":"Texture and edge information are equally important to identification of most of natural images. In view of the weakness of the existing integer order differential operators that it can't extract texture information from the images, this study developed a fractional differential algorithm, which can extract texture and marginal information simultaneously, based on settlement of the drift problem of fractional differential operator. Experimental results showed that our algorithm can not only extract texture information but also extract more edge information than the traditional algorithms.","PeriodicalId":269967,"journal":{"name":"2012 Fourth International Conference on Computational and Information Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132077264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The wellbore dynamic pressure waves are produced in the perforation liquid after the shaped charges are initiated and then fiercely strike the gunstring, packer, casing and artificial bottom. The impact and damage effect only depend on the amplitude and holding time of dynamic pressures. This paper discusses the simplification of perforators' explosion with gun in the oil well. On the basis of simplification model, the finite element method is applied to compute the wellbore dynamic pressure under different working conditions. The simulation results indicate that peak compression enhances and the duration of platform pressures obviously prolongs with the perforators' amount once detonated increasing. The holding time of platform pressure clearly prolongs with the accretion of perforator's explosive charge mass. The peak compression and holding time of reflection waves decrease with the augment of distance between the end of tubing and artificial bottom. The peak compression and holding time must be lowered if possible to avoid undesirable failures and damage during perforating operation.
{"title":"Numerical Computation of Wellbore Dynamic Pressure during Perforating","authors":"C. Li, Ming-yong Ma","doi":"10.1109/ICCIS.2012.192","DOIUrl":"https://doi.org/10.1109/ICCIS.2012.192","url":null,"abstract":"The wellbore dynamic pressure waves are produced in the perforation liquid after the shaped charges are initiated and then fiercely strike the gunstring, packer, casing and artificial bottom. The impact and damage effect only depend on the amplitude and holding time of dynamic pressures. This paper discusses the simplification of perforators' explosion with gun in the oil well. On the basis of simplification model, the finite element method is applied to compute the wellbore dynamic pressure under different working conditions. The simulation results indicate that peak compression enhances and the duration of platform pressures obviously prolongs with the perforators' amount once detonated increasing. The holding time of platform pressure clearly prolongs with the accretion of perforator's explosive charge mass. The peak compression and holding time of reflection waves decrease with the augment of distance between the end of tubing and artificial bottom. The peak compression and holding time must be lowered if possible to avoid undesirable failures and damage during perforating operation.","PeriodicalId":269967,"journal":{"name":"2012 Fourth International Conference on Computational and Information Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133822844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To meet 3GPP, the latest release of LTE Release 9 Standard, this paper designs and simulates the random access procedure of Network side protocol stack in LTE system. Firstly, this paper introduces the initial events of the random access procedure, and describes contention and non-contention outlines based on the random access procedure. Then, we specifically describe contention based the random access procedure, and put forward several important problems' solutions. Based on the design, using Specification and Description Language (SDL), the simulation of the conformance requirement of specification is met, and the feasibility is validated by the simulation.
{"title":"Design and Simulation of Random Access Procedure in TD-LTE","authors":"F. Chen, Zheng Zhang","doi":"10.1109/ICCIS.2012.124","DOIUrl":"https://doi.org/10.1109/ICCIS.2012.124","url":null,"abstract":"To meet 3GPP, the latest release of LTE Release 9 Standard, this paper designs and simulates the random access procedure of Network side protocol stack in LTE system. Firstly, this paper introduces the initial events of the random access procedure, and describes contention and non-contention outlines based on the random access procedure. Then, we specifically describe contention based the random access procedure, and put forward several important problems' solutions. Based on the design, using Specification and Description Language (SDL), the simulation of the conformance requirement of specification is met, and the feasibility is validated by the simulation.","PeriodicalId":269967,"journal":{"name":"2012 Fourth International Conference on Computational and Information Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113976622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to improve the precision of the radar/infrared composite guidance, the nonlinear problem of measurement model in radar/infrared compound guidance information fusion was researched in this paper. A radar and infrared weighted fusion algorithm based on unscented Kalman filter (UKF) was proposed. The algorithm which solved the nonlinear function of the measurement model approximates the probability density distribution of the nonlinear function instead of approximating the linear function used in extended Kalman filter, thus it avoids the filter divergence problem in model linearization. Simulation results show that this algorithm has good convergence properties, high fusion precision, good robustness and good real-time performance, so it meets the need of information fusion of radar/ infrared compound guidance.
{"title":"A Radar / IR Weighted Fusion Algorithm Based on the Unscented Kalman Filter","authors":"Zefeng Xie, Hongfeng Gao, Yafei Ren","doi":"10.1109/ICCIS.2012.38","DOIUrl":"https://doi.org/10.1109/ICCIS.2012.38","url":null,"abstract":"In order to improve the precision of the radar/infrared composite guidance, the nonlinear problem of measurement model in radar/infrared compound guidance information fusion was researched in this paper. A radar and infrared weighted fusion algorithm based on unscented Kalman filter (UKF) was proposed. The algorithm which solved the nonlinear function of the measurement model approximates the probability density distribution of the nonlinear function instead of approximating the linear function used in extended Kalman filter, thus it avoids the filter divergence problem in model linearization. Simulation results show that this algorithm has good convergence properties, high fusion precision, good robustness and good real-time performance, so it meets the need of information fusion of radar/ infrared compound guidance.","PeriodicalId":269967,"journal":{"name":"2012 Fourth International Conference on Computational and Information Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122968526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the CO2-rich reservoir, reinjecting associated gas cannot only achieve the purpose of enhancing oil recovery, but also can be achieved efficient use of CO2 resources and environmental protection of greenhouse gas processing. In this paper, through the formation fluid properties analysis of Hong Gang North Block, it shows the adaptability of re-injection associated gas. Beyond that, the P-x phase diagram of re-injection associated gas indicates the first non-hybrid camera contact management and equilibrium models with several contacts. Combining with this experimental results, it emulates the balance of the gas and liquid composition changes respectively from forehead to backhead contact on the basis of experimental data and then analyze the miscible phase of the mixed gas injection phase in the mass transfer process. Finally, contrast with the change of the pure CO2 injection, it can draw the conclusion that this two gas injection mass transfer management is immisiscrible and near misiscrible performance in this reservoir.
{"title":"CO2-Rich Associated Gas Re-injection Miscible Flooding Mechanism Research","authors":"Z. Ya, Pang Jin, Tang Shishi","doi":"10.1109/ICCIS.2012.101","DOIUrl":"https://doi.org/10.1109/ICCIS.2012.101","url":null,"abstract":"In the CO2-rich reservoir, reinjecting associated gas cannot only achieve the purpose of enhancing oil recovery, but also can be achieved efficient use of CO2 resources and environmental protection of greenhouse gas processing. In this paper, through the formation fluid properties analysis of Hong Gang North Block, it shows the adaptability of re-injection associated gas. Beyond that, the P-x phase diagram of re-injection associated gas indicates the first non-hybrid camera contact management and equilibrium models with several contacts. Combining with this experimental results, it emulates the balance of the gas and liquid composition changes respectively from forehead to backhead contact on the basis of experimental data and then analyze the miscible phase of the mixed gas injection phase in the mass transfer process. Finally, contrast with the change of the pure CO2 injection, it can draw the conclusion that this two gas injection mass transfer management is immisiscrible and near misiscrible performance in this reservoir.","PeriodicalId":269967,"journal":{"name":"2012 Fourth International Conference on Computational and Information Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124049042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Unified Modeling Language (UML) provides various diagrams to depict system characteristics and complex environment from different viewpoints and different application layers. It also contains a lot of standard elements with vague and sparse semantics. Researching how to combine Unified Modeling Language (UML) with formal method in order to improve UML semantic accuracy is a hotspot of researches in software engineering because of the half formal characteristic of UML. This paper defines Syntax Domains, Abstract Syntax, Semantic Domains, Semantic Functions of UML sequence diagram using Denotational Semantics, formally depicts sequence diagram on the function of the each syntax object of sequence diagram. It provides the foundation for accuracy and consistency validation of UML sequence diagram.
{"title":"The Denotational Semantics-Based Formalized Standard of UML Sequence Diagrams","authors":"Yuebo Liu, Haitao Yu","doi":"10.1109/ICCIS.2012.323","DOIUrl":"https://doi.org/10.1109/ICCIS.2012.323","url":null,"abstract":"Unified Modeling Language (UML) provides various diagrams to depict system characteristics and complex environment from different viewpoints and different application layers. It also contains a lot of standard elements with vague and sparse semantics. Researching how to combine Unified Modeling Language (UML) with formal method in order to improve UML semantic accuracy is a hotspot of researches in software engineering because of the half formal characteristic of UML. This paper defines Syntax Domains, Abstract Syntax, Semantic Domains, Semantic Functions of UML sequence diagram using Denotational Semantics, formally depicts sequence diagram on the function of the each syntax object of sequence diagram. It provides the foundation for accuracy and consistency validation of UML sequence diagram.","PeriodicalId":269967,"journal":{"name":"2012 Fourth International Conference on Computational and Information Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124456595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, the implementation of Web-based short message application is discussed. The application is suitable for the enterprises that demand short message function in the B/S management system. Deploying the application to Tomcat Web server, we can send and receive short messages. The application can provide short message service, so have a good prospect.
{"title":"Research on Web-Based SMS Application","authors":"Chao Geng, Chun-rong Sui, Wanquan Dong","doi":"10.1109/ICCIS.2012.266","DOIUrl":"https://doi.org/10.1109/ICCIS.2012.266","url":null,"abstract":"In this paper, the implementation of Web-based short message application is discussed. The application is suitable for the enterprises that demand short message function in the B/S management system. Deploying the application to Tomcat Web server, we can send and receive short messages. The application can provide short message service, so have a good prospect.","PeriodicalId":269967,"journal":{"name":"2012 Fourth International Conference on Computational and Information Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128598183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The prediction of financial distress has received considerable attention in accounting and corporate financial literatures for decades. Various quantitative prediction methods based on financial ratios derived from financial statements have been proposed. This paper uses SOM neural network technology to quantitatively classify the financial distress prediction indexes in Sinopec Corp. and its subsidiaries, which is particularly important for the financial distress prediction modeling process. The Case study of Sinopec Yizheng Chemical Fibre Company Limited is carried out at section 4. And the statistics result shows that even for the same enterprise, the contents and the numbers of the selected evaluation indexes in financial distress prediction model are different during the different periods the enterprise enters.
{"title":"The Method of Classification for Financial Distress Prediction Indexes of Sinopec Corp. and Its Subsidiaries Based on Self-Organizing Map Neural Network","authors":"D. Yu, Sun Tao","doi":"10.1109/ICCIS.2012.333","DOIUrl":"https://doi.org/10.1109/ICCIS.2012.333","url":null,"abstract":"The prediction of financial distress has received considerable attention in accounting and corporate financial literatures for decades. Various quantitative prediction methods based on financial ratios derived from financial statements have been proposed. This paper uses SOM neural network technology to quantitatively classify the financial distress prediction indexes in Sinopec Corp. and its subsidiaries, which is particularly important for the financial distress prediction modeling process. The Case study of Sinopec Yizheng Chemical Fibre Company Limited is carried out at section 4. And the statistics result shows that even for the same enterprise, the contents and the numbers of the selected evaluation indexes in financial distress prediction model are different during the different periods the enterprise enters.","PeriodicalId":269967,"journal":{"name":"2012 Fourth International Conference on Computational and Information Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128478871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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