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2015 IEEE 16th International Conference on communication technology(ICCT 2015)

作者： Huan Li Wenhua Ye No.36 Research Institute of CETC Science Technology on Communication Information Security Control Laboratory

Frequency shift keying（FSK） modulation function in MATLAB without filter function, leading to poor adjacent channel suppression, which causes aliasing after a non-linear device easily. Based on FSK modulation signal generation principle, designing a better adjacent channel suppression function in this paper, which verified by demodulating through Agilent’s vector signal analyzer（89600S）, this function gets achieved more satisfactory results in the application of semi physical simulation.

关键词： Frequency shift keying（FSK） Modulation Adjacent channel suppression

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Profiling and identifying users' activities with network traffic analysis

Profiling and identifying users' activities with network tra...

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IEEE International Conference on Software Engineering and Service sciences (ICSESS)

作者： Ma Tao Ye Chun Ming Chen Juan Science and Technology on Communication Information Security Control Laboratory Jiaxing China Army Officer Academy Hefei China

ISBN: (纸本)9781479983544

Traffic identification technique is used for classification of different network protocols and applications even with detection of users' network activities. In this paper, we conduct our study on some typical users' network activities and present a traffic identification method to describe the feature about users' behaviors. We convert users' network activities information into different sequences with frame size and inter-arrival time just like HMM model does. Then we use latent dirichlet allocation model to extract potential characterization from these activity sequences. We use some machine learning algorithms to classify different activities in the data, and we suggest a method to evaluate the mixed activities within a sequence. Our research shows that it is possible to distinguish exact users' on-line activities without inspection to packet payloads, and users' privacy may need more protection against traffic analysis.

关键词： Hidden Markov models Protocols Entropy Payloads Computers Accuracy Feature extraction

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A new important-place identification method

A new important-place identification method

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International Conference on Computer and communications (ICCC)

作者： Chun-lai Ma Tao Ma Hong Shan Electronic Engineering Institute Hefei China Science and Technology on Communication Information Security Control Laboratory Hefei China

ISBN: (纸本)9781467381277

For the problem that the location of LBSN users was sparse because of it was updated sporadically. An important place identification method was studied by improving the clustering algorithm. Firstly, a velocity pruning algorithm was applied to remove interference points from source data. Secondly, clustering algorithm based on density peak named CFSFDP was selected. To solve the problem that it is unable to decide the cluster number with CFSFDP, an improved algorithm was presented. With a cluster center automatic choosing strategy, the algorithm searched for the `turning points' with the trends of cluster center weights changing. Then we could regard a set of points which weight is bigger than turning points' as cluster center. As a result, the error brought by ruling in the Decision Graph could be avoided with the strategy. Thirdly, reverse geocoding technology was applied to translate coordinate in semantic place. Check-in data of Foursquare user was set as an example in experiment, the result show that the improved algorithm had higher accuracy rate and lower computation compared to CFSFDP and DBSCAN. It also proved that the feasibility and effectiveness of the method proposed in the paper.

关键词： Clustering algorithms Algorithm design and analysis Turning Market research Social network services Global Positioning System Target tracking

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Global, regional, and national sex-specific burden and control of the HIV epidemic, 1990–2019, for 204 countries and territories: the Global Burden of Diseases Study 2019

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The Lancet HIV 2021年第10期8卷 e633-e651页

作者： Jahagirdar, Deepa Walters, Magdalene K. Novotney, Amanda Brewer, Edmond D. Frank, Tahvi D. Carter, Austin Biehl, Molly H. Abbastabar, Hedayat Abhilash, E.S. Abu-Gharbieh, Eman Abu-Raddad, Laith Jamal Adekanmbi, Victor Adeyinka, Daniel Adedayo Adnani, Qorinah Estiningtyas Sakilah Afzal, Saira Aghababaei, Soodabeh Ahinkorah, Bright Opoku Ahmad, Sajjad Ahmadi, Keivan Ahmadi, Sepideh Ahmadpour, Ehsan Ahmed, Muktar Beshir Rashid, Tarik Ahmed Salih, Yusra Ahmed Aklilu, Addis Akram, Tayyaba Akunna, Chisom Joyqueenet Al Hamad, Hanadi Alahdab, Fares Alanezi, Fahad Mashhour Aleksandrova, Ekaterina A. Alene, Kefyalew Addis Ali, Liaqat Alipour, Vahid Almustanyir, Sami Alvis-Guzman, Nelson Ameyaw, Edward Kwabena Amu, Hubert Andrei, Catalina Liliana Andrei, Tudorel Anvari, Davood Arabloo, Jalal Aremu, Olatunde Arulappan, Judie Atnafu, Desta Debalkie Quintanilla, Beatriz Paulina Ayala Ayza, Muluken Altaye Azari, Samad Darshan, B.B. Banach, Maciej Bärnighausen, Till Winfried Barra, Fabio Barrow, Amadou Basu, Sanjay Bazargan-Hejazi, Shahrzad Belay, Habtamu Gebrehana Berheto, Tezera Moshago Bezabhe, Woldesellassie Mequanint Bezabih, Yihienew Mequanint Bhagavathula, Akshaya Srikanth Bhardwaj, Nikha Bhardwaj, Pankaj Bhattacharyya, Krittika Bibi, Sadia Bijani, Ali Bisignano, Catherine Bolarinwa, Obasanjo Afolabi Boloor, Archith Boltaev, Azizbek A. Briko, Nikolay Ivanovich Buonsenso, Danilo Burkart, Katrin Butt, Zahid A. Cao, Chao Charan, Jaykaran Chatterjee, Souranshu Chattu, Soosanna Kumary Chattu, Vijay Kumar Choudhari, Sonali Gajanan Chu, Dinh-Toi Couto, Rosa A.S. Cowden, Richard G. Dachew, Berihun Assefa Dadras, Omid Dagnew, Amare Belachew Dahlawi, Saad M.A. Dai, Xiaochen Dandona, Lalit Dandona, Rakhi das Neves, José Degenhardt, Louisa Demeke, Feleke Mekonnen Desta, Abebaw Alemayehu Deuba, Keshab Dhamnetiya, Deepak Dhungana, Govinda Prasad Dianatinasab, Mostafa Diaz, Daniel Djalalinia, Shirin Doan, Linh Phuong Dorostkar, Fariba Edinur, Hisham Atan Effiong, Andem Eftekharzadeh, Sahar El Sayed Zaki, Maysaa Elayedath, Rajesh Elhadi, Institute for Health Metrics and Evaluation University of Washington Seattle WA United States Department of Health Metrics Sciences School of Medicine University of Washington Seattle WA United States Division of Allergy and Infectious Diseases University of Washington Seattle WA United States Department of Global Health University of Washington Seattle WA United States School of Social Work University of Washington Seattle WA United States Department of Medicine University of Washington Seattle WA United States Vagelos College of Physicians and Surgeones Columbia University Medical Center New York NY United States Division of Data Analytics and Delivery for Impact WHO Geneva Switzerland Advanced Diagnostic and Interventional Radiology Research Centre Tehran University of Medical Sciences Tehran Iran Multiple Sclerosis Research Centre Tehran University of Medical Sciences Tehran Iran School of Public Health Tehran University of Medical Sciences Tehran Iran Department of Epidemiology and Biostatistics Tehran University of Medical Sciences Tehran Iran Paediatric Chronic Kidney Disease Research Centre Tehran University of Medical Sciences Tehran Iran Department of Psychiatry Tehran University of Medical Sciences Tehran Iran Metabolomics and Genomics Research Centre Tehran University of Medical Sciences Tehran Iran Sina Trauma and Surgery Research Centre Tehran University of Medical Sciences Tehran Iran Research Centre for Immunodeficiencies Tehran University of Medical Sciences Tehran Iran Non-Communicable Diseases Research Centre Tehran University of Medical Sciences Tehran Iran Department of Botany Sree Narayana Guru College Chelannur Kozhikode India Clinical Sciences Department University of Sharjah Sharjah United Arab Emirates Mass Communication Department University of Sharjah Sharjah United Arab Emirates Department of Health-Care Policy and Research Weill Cornell Medical College in Qatar Doha Qatar Department of Population Medicine Ca

Background: The sustainable development goals (SDGs) aim to end HIV/AIDS as a public health threat by 2030. Understanding the current state of the HIV epidemic and its change over time is essential to this effort. This study assesses the current sex-specific HIV burden in 204 countries and territories and measures progress in the control of the epidemic. Methods: To estimate age-specific and sex-specific trends in 48 of 204 countries, we extended the Estimation and Projection Package Age-Sex Model to also implement the spectrum paediatric model. We used this model in cases where age and sex specific HIV-seroprevalence surveys and antenatal care-clinic sentinel surveillance data were available. For the remaining 156 of 204 locations, we developed a cohort-incidence bias adjustment to derive incidence as a function of cause-of-death data from vital registration systems. The incidence was input to a custom Spectrum model. To assess progress, we measured the percentage change in incident cases and deaths between 2010 and 2019 (threshold >75% decline), the ratio of incident cases to number of people living with HIV (incidence-to-prevalence ratio threshold <0·03), and the ratio of incident cases to deaths (incidence-to-mortality ratio threshold <1·0). Findings: In 2019, there were 36·8 million (95% uncertainty interval [UI] 35·1–38·9) people living with HIV worldwide. There were 0·84 males (95% UI 0·78–0·91) per female living with HIV in 2019, 0·99 male infections (0·91–1·10) for every female infection, and 1·02 male deaths (0·95–1·10) per female death. Global progress in incident cases and deaths between 2010 and 2019 was driven by sub-Saharan Africa (with a 28·52% decrease in incident cases, 95% UI 19·58–35·43, and a 39·66% decrease in deaths, 36·49–42·36). Elsewhere, the incidence remained stable or increased, whereas deaths generally decreased. In 2019, the global incidence-to-prevalence ratio was 0·05 (95% UI 0·05–0·06) and the global incidence-to-mortality ratio was

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On the achievability of interference alignment for three-cell MIMO interfering broadcast channel

On the achievability of interference alignment for three-cel...

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International Conference on communication technology (ICCT)

作者： Xiaofeng Xu Caowei Wang Science and Technology on Communication Information Security Control Laboratory JiaXing China Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781467370066

Interference alignment (IA) is a promising technique to effectively mitigate interference in wireless communication systems. In this paper, a novel IA based scheme is proposed, which is jointed design of transmit precoding matrices and receive beam forming matrices for the three-cell multiple-input multiple-output (MIMO). Gaussian interfering broadcast channels (MIMO-IFBC) with constant channel between each node, where each base station (BS) is equipped with M antennas, each mobile station (MS) is equipped with N antennas on the cell boundary, and each BS sends d data streams to each user in its cell. This corresponds to a down link scenario for cellular networks, where K users with the user cooperation in each cell. It is also analytically shown that total 3Kd degrees of freedom (Do F) is achievable if M = N ≥ 2Kd. The simulations demonstrate the sum-rate of our proposed scheme also out performs those of conventional techniques, especially in the high signal-to-noise ratio (SNR) regime.

关键词： Antennas MIMO Libraries Interference

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Study of Digital Modulation Signal Error Vector Magnitude Based on Vector Signal Analyzer

Study of Digital Modulation Signal Error Vector Magnitude Ba...

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International Symposium on Computational Intelligence and Design

作者： Huan Li Wenhua Ye No.36 Research Institute of CETC Jiaxing Zhejiang 314033China Science Technology on Communication Information Security Control Laboratory

ISBN: (纸本)9781467395885

In this article, based on the working principle of vector signal analyzer and theories of error vector magnitude (EVM), Combined signal demodulation experiment of vector signal analyzer, converting some types of digital modulation signal EVM into root mean square of error vector magnitude(EVMRMS) . According to the relationship between EVMRMS and bit error rate(BER), analyzing the relationship between vector signal analyzer EVM and BER, and the simulation results are carried out.

关键词： Error Vector Magnitude (EVM) Bit error rate ( BER) Digital modulation Vector signal analyzer

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An improved algorithm for minimum connected dominating sets in ad hoc networks

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ICIC Express Letters, Part B: Applications 2015年第1期6卷 201-206页

作者： Yang, Hong-Wa Yang, Xiao-Niu Li, Xin-Feng Lu, Zhe-Ming Science and Technology on Communication Information Security Control Laboratory Jiaxing China School of Aeronautics and Astronautics Zhejiang University No. 38 Zheda Road Hangzhou China

Given a graph, a connected dominating set is a subset of vertices such that every vertex is either in the subset or adjacent to a vertex in the subset and the subgraph induced by the subset is connected. A minimum connected dominating set (MCDS) is such a subset with the smallest possible cardinality. MCDS is popularly used for constructing virtual backbones for broadcasting in ad hoc networks. In this paper, we add breath-first-search in Phase II of Alzoubi’s distributed connected dominating set algorithm. The improved algorithm can find MCDS in both connected and disconnected graphs while the original algorithm can only be applied to connected graphs.

关键词： Ad hoc networks

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Improved (Pseudo) preimage attacks on reduced-round GOST and Grøstl-256 and studies on several truncation patterns for AES-like compression functions 10th

Improved (Pseudo) preimage attacks on reduced-round GOST and...

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10th International Workshop on security, IWSEC 2015

作者： Ma, Bingke Li, Bao Hao, Ronglin Li, Xiaoqian State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing100093 China Data Assurance and Communication Security Research Center Chinese Academy of Sciences Beijing100093 China University of Chinese Academy of Sciences Beijing China Department of Electronic Engineering and Information Science University of Science and Technology of China Hefei230027 China

ISBN: (纸本)9783319224244

In this paper, we present improved preimage attacks on the reduced-round GOST hash function family, which serves as the new Russian hash standard, with the aid of techniques such as the rebound attack, the Meet-in-the-Middle preimage attack and the multicollisions. Firstly, the preimage attack on 5-round GOST-256 is proposed which is the first preimage attack for GOST-256 at the hash function level. Then we extend the (previous) attacks on 5-round GOST-256 and 6-round GOST-512 to 6.5 and 7.5 rounds respectively by exploiting the involution property of the GOST transposition operation. Secondly, inspired by the preimage attack on GOST-256, we also study the impacts of four representative truncation patterns on the resistance of the Meet-in-the-Middle preimage attack against AES-like compression functions, and propose two stronger truncation patterns which make it more difficult to launch this type of attack. Based on our investigations, we are able to slightly improve the previous pseudo preimage attacks on reduced-round Grøstl-256. © Springer International Publishing Switzerland 2015.

关键词： Hash functions

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Tunnel moving target detection based on local structure of image and gray scale information

Tunnel moving target detection based on local structure of i...

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IEEE International Conference on Intelligent Transportation Engineering (ICITE)

作者： Haiyang Yu Yawen Hu Hongyu Guo Lin Fang People's Republic of China Key Laboratory of Urban ITS Technology Optimization and Integration Ministry of Public Security Hefei China School of Transportation Science and Engineering Beihang University Beijing China Infrastructure Systems and Safety Control Beihang University Beijing China Information Industry Co. Ltd. Beijing China

ISBN: (纸本)9781467390491

Tunnel moving target detection is subject to the influence of light condition and motion blur, the traditional motion detection method based on pixel points can not be very good at segmenting moving target. To solve this problem, frame difference detection method based on local structure of image and gray level information is proposed. The local mean difference information of the image is calculated by the improved algorithm, and then the similarity measure function and the gray scale measure function are constructed. The similarity measure function effectively describes the structural features of moving objects, and reduces the influence of image background information. The gray scale function is better to highlight the contrast of the target brightness, to increase the division of the target area and the background parts, and to realize the moving target detection correctly. The experimental results show that the detection method of the fusion structure and the gray level information can effectively segment the moving object.

关键词： Image segmentation Object detection Brightness Electronic mail Motion segmentation Lighting Transportation

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A Zero-Stored Biometric Authentication Scheme Based on the Fuzzy Vault

A Zero-Stored Biometric Authentication Scheme Based on the F...

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2015 World Conference on control, Electronics and Electrical Engineering(WCEE 2015)

作者： Xu Yao Jiayong Liu Dianhua Tang Enbo Fang College of Electronics and Information Engineering Sichuan University Science and Technology on Communication Security Laboratory

Traditional remote authentication based on the passwords is vulnerable for password guessing attacks and simple dictionary *** have following advantages:(i)they cannot be forgotten(ii)they are very difficult to guess(iii)they are extremely hard to copy or ***,biometrics have been applied across many authentication online services,which can provide strong security and guarantee the identity of *** this paper,a new biometric-based multi-server authentication scheme with smart card and password is proposed by applying fuzzy vault with biometrics to ensure the security of the user’s authentication *** proposed scheme doesn’t need to store biometric information in the smart cards or any verification tables in the *** comprehensive analysis indicates that the proposed scheme is secure against impersonation attack,replay attack,smart cards attack and so ***,it is also more practical for the realistic online applications by applying the fuzzy vault scheme in place of one-way hash function.

关键词： Authentication Biometrics Smart Cards Passwords Fuzzy vault

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