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SQLS:A Storm-Based Query Language System for Real-Time Stream Data Analysis

Chinese Journal of Electronics 2016年第6期25卷 1025-1033页

作者： JI Yimu ZHANG Dianchao SUN Yanfei ZHAO Chuanxin HE Jing WANG Ruchuan CHEN Guoliang Computer of Science Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Key Laboratory of Computer Network and Information Integration Southeast University Key Laboratory of Intelligent Perception and Systems for High-Dimensional Information of Ministry of Education Nanjing University of Science and Technology Computer of Telecommunications Nanjing University of Posts and Telecommunications Department of Computer Anhui Normal University Engineering and Science Victoria University

In this work, a Storm-based query language System(SQLS) is proposed for real-time data stream analysis. The system is compatible with Continuous query language(CQL) specification. It supports both continuous queries and one-time queries over streaming data, and meets the requirements of user experience(traditional SQL queries) and Qo S(such as real-time and throughput). In order to better meet the requirement of throughput and enhance the processing efficiency, the load shedding algorithm and cache optimization are employed during the implementation of SQL-like operators. Finally, performance testing of the proposed SQLS has been conducted on standalone Storm platform and Storm clusters. Experimental results show that our system can not only meet the needs of users, but also extend the function of real-time streaming queries processing.

关键词： Continuous query Ad hoc query Storm CQL Real-time query processing

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1.3-μm 4×25-Gb/s hybrid integrated TOSA and ROSA

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Frontiers of Information Technology & Electronic engineering 2019年第4期20卷 490-497页

作者： Yu LIU Hao-tian BAO Yi-ming ZHANG Zhi-ke ZHANG Yun-shan ZHANG Xiang-fei CHEN Jun LU Yue-chun SHI Jia-shun ZHANG Liang-liang WANG Jun-ming AN Ning-hua ZHU State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences School of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Engineering and Computer Science Peking University Microwave-Photonics Technology Laboratory College of Engineering and Applied Sciences Nanjing University

The design and fabrication of a compact and low-cost 4×25-Gb/s transmitter optical sub-assembly(TOSA) and receiver optical sub-assembly(ROSA) using a hybrid integrated technique are reported. TOSA and ROSA are developed without thermoelectric cooler for coarse wavelength division multiplexing applications. Physical dimension of the packaged optical subassembly is limited to 11.5 mm×5.4 mm×5.4 mm. The design of TOSA and ROSA is employed using a silica-based arrayed waveguide grating chip to select the specific channel wavelength at O-band. In TOSA, the wavelength of four 1.3-μm discrete directly modulated laser chips is well controlled based on the reconstruction equivalent chirp technique. In the back-to-back transmission test, bit error rates for all lanes of cascade of the TOSA and ROSA are small. A clear opening eye diagram is obtained.

关键词： Reconstruction equivalent chirp Arrayed waveguide grating Transmitter optical subassembly Hybrid integrated

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Driving Android apps to trigger target API invocations based on activity and GUI filtering

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Science China(Information Sciences) 2017年第7期60卷 262-264页

作者： Hongzhou YUE Yuqing ZHANG Wenjie WANG Qixu LIU State Key Laboratory of Integrated Services Networks Xidian University National Computer Network Intrusion Protection Center University of Chinese Academy of Sciences State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of Sciences

For an Android app tester,it is often needed to trigger the specific behaviors of an ***,most of the existing Android GUI exploration tools only pursue high code coverage,rather than triggering the specific behaviors of an app[1,2].It inevitably leads to the unnecessary time consumption in the exploration process of an app if the testers only care about some specific behaviors of this ***,methods of making a more targeted GUI exploration tool had been studied by

关键词： GUI API Driving Android apps to trigger target API invocations based on activity and GUI filtering

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Energy Efficient Power Allocation for Relay-Aided D2D Communications in 5G networks

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China Communications 2017年第6期14卷 54-64页

作者： Ru Wang Jia Liu Guopeng Zhang Shuanghong Huang Ming Yuan State Key Laboratory of Integrated Services Networks Xidian University Department of Computer Science and Engineering Huaihua University School of Computer Science and Technology China University of Mining and Technology Wireless Advanced Research Department ZTE Corporation

As one of the key technologies for the fifth generation(5G) wireless networks,device-to-device(D2D) communications allow user equipment(UE) in close proximity to communicate with each other *** by a relay,the relay-aided D2D(RA-D2D) communications can not only be applied to communications in much longer distance but also achieve a high quality of service(Qo S) .In this paper,we first propose a two-layer system model allowing RA-D2 D links to underlay traditional cellular *** we maximize the energy efficiency of the RA-D2 D link while satisfying the minimum data-rate of the cellular *** optimal transmit power at both D2 D transmitter and D2 D relay sides is obtained by transforming the nonlinear fractional programming into a nonlinear parameter *** results show that our proposed power allocation method is more energy efficient than the existing works,and the proposed RA-D2 D scheme outperformed direct D2 D scheme when the distance between two D2 D users is longer.

关键词： D2D communication relay-aided underlay green communication energy efficiency power allocation

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A middleware approach for industrial wireless automation networks

A middleware approach for industrial wireless automation net...

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8th IASTED International Conference on Wireless and Optical Communications, WOC 2008

作者： Buda, Aurel Schuermann, Volker Wollert, Joerg F. Laboratory for Software Engineering and Computer Networks University of Applied Sciences Bochum 44801 Bochum Germany

ISBN: (纸本)9780889867444

Many fields of the industrial automation can be already served by wireless technologies. Due to the different requirements regarding the reliability, latency, number of nodes, node density and range to communication systems there is no uniform standard for wireless communication covering all domains of automation. It is to be expected in the future on a strongly increasing number of radio technologies and protocol stacks on different platforms and operating systems. Similarly it behaves within the classical wired field of the industrial automation. The number of Fieldbus standards for the different areas of applications is in the meantime only difficult to overlook. Uniform integration interfaces neither exist on the side of the radio technologies nor on that of classical control systems. This means direct additional complexity both for developers of wireless solutions and operators of industrial plants. This problem addresses the contribution and argues with the integration of wireless technologies into decentralized control systems. For relaying between both systems the architecture and the structure of a Convergence Middleware are presented, which abstracts the technology-specific details and makes a uniform integration interface available for wireless industrial communication systems.

关键词： Integration

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Theoretical aspects and sensing demonstrations of cone-shaped inwall capillary-based microsphere resonators

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Photonics Research 2017年第5期5卷 507-511页

作者： XIAOBEI ZHANG YONG YANG HUAWEN BAI JIAWEI WANG MING YAN HAI XIAO TINGYUN WANG Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai Institute for Advanced Communication and Data ScienceSchool of Communication and Information Engineering Shanghai University Department of Electrical and Computer Engineering Clemson University

In this paper, a detailed theoretical study on the characteristics of cone-shaped inwall capillary-based microsphere resonators is described and demonstrated for sensing applications. The maximum, minimum, slope, contrast, and width of the Fano resonance are analyzed. As the transmission coefficient of the capillary resonator increases, the absolute value of the slope of Fano resonances increases to reach its maximum, which is useful for sensors with an ultra-high sensitivity. There occurs another phenomenon of electromagnetically induced transparency when the reflectivity at the capillary–environment interface is close to 100%. We also experimentally demonstrated its capability for temperature and refractive index sensing, with a sensitivity of 10.9 pm∕°C and 431 d B∕RIU basedon the Fano resonance and the Lorentzian line shape, respectively.

关键词： In Theoretical aspects and sensing demonstrations of cone-shaped inwall capillary-based microsphere resonators As

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MULTI-GRANULARITY EVOLUTION ANALYSIS OF SOFTWARE USING COMPLEX NETWORK THEORY

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Journal of Systems Science & Complexity 2011年第6期24卷 1068-1082页

作者： Weifeng PAN Bing LI Yutao MA Jing LIU State Key Laboratory of Software Engineering Wuhan University Wuhan 430072 China School of Computer Science and Information Engineering Zhejiang Gongshang University Hangzhou 310018 China School of Computer Wuhan University Wuhan 430072 China Complex Networks Research Center Wuhan University Wuhan 430072 China

Software systems are a typical kind of man-made complex systems. Understanding their evolutions can lead to better software engineering practices. In this paper, the authors use complex network theory as a tool to analyze the evolution of object-oriented （OO） software from a multi-granularity perspective. First, a multi-granularity software networks model is proposed to represent the topological structures of a multi-version software system from three levels of granularity. Then, some parameters widely used in complex network theory are applied to characterize the software networks. By tracing the parameters＇ values in consecutive software systems, we have a better understanding about software evolution. A case study is conducted on an open source OO project, Azureus, as an example to illustrate our approach, and some underlying evolution characteristics are uncovered. These results provide a different dimension to our understanding of software evolutions and also are very useful for the design and development of OO software systems.

关键词： Complex networks multi-granularity software evolution software system.

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A model of security information flow on entities for trust computation

A model of security information flow on entities for trust c...

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10th IEEE International Conference on computer and Information Technology, CIT-2010, 7th IEEE International Conference on Embedded Software and Systems, ICESS-2010, 10th IEEE Int. Conf. Scalable Computing and Communications, ScalCom-2010

作者： Bahtiyar, Şerif Cihan, Murat Çaǧlayan, Mehmet Ufuk Computer Networks Research Laboratory Department of Computer Engineering Boǧaziçi University Bebek Istanbul 34342 Turkey

ISBN: (纸本)9780769541082

Service oriented environments are computer network systems that are highly dynamic and change with time. Entities in such environments have different security needs from services. Management of security information in dynamic environments with multiple entities, each with its own changing needs, is a complex task. The complexity mainly arises from a lack of trust to security information collected from entities and services. Therefore, the trust assessment about services, which is a crucial task, depends on the propagation of security information. In this paper, a new model of security information flow over entities is proposed for trust computation about services. The model is presented together with a simple scenario to clarify the proposed model. © 2010 IEEE.

关键词： Information services

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Poster abstract: Synchronous transmissions enable simple yet accurate protocol modeling

Poster abstract: Synchronous transmissions enable simple yet...

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11th ACM Conference on Embedded Networked Sensor Systems, SenSys 2013

作者： Zimmerling, Marco Ferrari, Federico Mottola, Luca Thiele, Lothar Computer Engineering and Networks Laboratory ETH Zurich Switzerland Politecnico di Milano Italy Sweden

ISBN: (纸本)9781450320276

Traditional low-power wireless protocols maintain distributed network state to cope with link dynamics. Modeling the pro- tocol operation as a function of network state is dificult as the state is frequently updated in an uncoordinated fashion. Recent protocols use synchronous transmissions (ST): mul- tiple nodes send simultaneously towards the same receiver, as opposed to pairwise link-based transmissions (LT). ST en- able eficient multi-hop protocols with little network state. We studied whether ST in Glossy enable simple yet accu- rate protocol modeling [10]. Based on extensive testbed experiments and statistical analyses, we found that: (i) unlike LT, packet receptions and losses with ST largely adhere to a sequence of independent and identically distributed (i.i.d.) Bernoulli trials;(ii) this property greatly simplifies accurately modeling ST-based protocols, as we demonstrated by obtaining model errors below 0.25% in energy for the Glossy based Low-Power Wireless Bus (LWB).

关键词： Wireless sensor networks

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SugarMate: Non-intrusive blood glucose monitoring with smartphones

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Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies 2017年第3期1卷 1–27页

作者： Gu, Weixi Zhou, Yuxun Zhou, Zimu Liu, Xi Zou, Han Zhang, Pei Spanos, Costas Zhang, Lin Tsinghua-Berkeley Shenzhen Institute Shenzhen China Electrical Engineering and Computer Sciences University of California Berkeley United States Computer Engineering and Networks Laboratory ETH Zurich Switzerland Department of Electrical and Computer Engineering Carnegie Mellon University United States

Inferring abnormal glucose events such as hyperglycemia and hypoglycemia is crucial for the health of both diabetic patients and non-diabetic people. However, regular blood glucose monitoring can be invasive and inconvenient in everyday life. We present SugarMate, a first smartphone-based blood glucose inference system as a temporary alternative to continuous blood glucose monitors (CGM) when they are uncomfortable or inconvenient to wear. In addition to the records of food, drug and insulin intake, it leverages smartphone sensors to measure physical activities and sleep quality automatically. Provided with the imbalanced and often limited measurements, a challenge of SugarMate is the inference of blood glucose levels at a fine-grained time resolution. We propose Md3RNN, an efficient learning paradigm to make full use of the available blood glucose information. Specifically, the newly designed grouped input layers, together with the adoption of a deep RNN model, offer an opportunity to build blood glucose models for the general public based on limited personal measurements from single-user and grouped-users perspectives. Evaluations on 112 users demonstrate that Md3RNN yields an average accuracy of 82.14%, significantly outperforming previous learning methods those are either shallow, generically structured, or oblivious to grouped behaviors. Also, a user study with the 112 participants shows that SugarMate is acceptable for practical usage. © 2017 ACM.

关键词： Smartphones

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