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August 30,2014
Volume 7,Issue 16
Pages -
Subject Area:Computer Architecture,Computer Applications,Computer Software,Computer Network,Chaos,Control Theory,Basic Subject of Information Science and System Science

Title: Research and implementation of RTEMS multi-core processor support

Authors: WU Bo, BIAN Jiali
PP: 1680-1686
Abstract: This paper researches and summarizes the latest progress of real time executive for multi-processor system (RTEMS) multi-core support. Firstly, this paper points out the trend of embedded multi-core, analyses the model of multi-core support operating system and implementation of current popular real-time operating system. Then, the implementation of RTEMS multi-core processor support has been studied in detail, mainly including data structure used for each processor core information, multi-core support RTEMS initialization process, reformation of synchronization mechanism, deterministic priority real time executive for symmetric multi-processing (SMP) scheduler. Furthermore, this paper tests multi-core support on the QEMU emulator, and makes 3 tasks to migrate between 2 processor cores by changing priority, which verifies multi-core support. Finally, improvement direction is also presented.
Keywords: operating system and operating environment; multi-core; symmetric multi-processing; real time executive for multi-processor system

Title: An accurate accounting system combining bandwidth reserve with data volume and its application in vector network

Authors: LIU Xuanti, LIANG Mangui
PP: 1671-1679
Abstract: This paper proposes an accurate accounting system combining bandwidth reserve with data volume, and provides practical applications in vector network with multiple data forwarding level. The system meets the high resolution requirement for account in next generation network, which simplifies the operation and reduces the cost. The total amount in this scheme will be divided into two parts to calculate: the amount related to bandwidth reserve and the amount related to data volume. Through the real-time detection of path rate, vector network accounting system reaches a higher resolution than the existing ones. Based on vector network, the principle and overall scheme of this accounting scheme are introduced, and the design and implementation scheme of end system accounting module are given, which is realized with Linux kernel module.
Keywords: computer system architecture; accounting system; bandwidth; data volume; vector net

Title: Key technology of yellow page searching based on Coreseek

Authors: WANG Zhengyi, FAN Wenqing, HUANG Wei, PAN Yun
PP: 1664-1670
Abstract: There are usually inevitable problems with designing and developing from scratching a stable, accurate and efficient system for searching yellow pages, such as high development cost, long development cycle and the like. For this kind of situation, a solution of implementing a yellow page searching system based on Coreseek is proposed, with key technologies for implementing the system being described in detail. With split testing, the system can improve retrieval speed and search quality and has good expansibility, satisfying the yellow page searching demands of mobile Internet enterprises.
Keywords: computer application; full-text search; Coreseek; yellow page databases; Chinese word segmentation

Title: Fracture detection of coal rock image based on morphology and SOM neural network

Authors: FAN Baorong, ZHANG Wei, LI Chaofeng, JU Yiwen
PP: 1657-1663
Abstract: In order to detect the fracture of the coal rock image, a method of combing multi-structure elements morphology with self-organizing map (SOM) neural network clustering is presented in this paper. Firstly, multi-structure elements morphology is used to detect the edges of the coal rock image, and then the feature parameters of edges are calculated as the inputs of SOM neural network. Finally, the fracture edges and the non-fracture edges are classified by the SOM neural network clustering algorithm, and the fracture edges of image are gained. Experimental results show that this new method can effectively detect and extract the fracture information of coal rock image.
Keywords: computer application; fracture detection; mathematical morphology; self-organizing map clustering

Title: Research of multi-dimensional dynamic report in large coal enterprise

Authors: ZHANG Xiaoyan, ZHANG Huazhong
PP: 1651-1656
Abstract: To address the needs of large coal enterprises report processing large volumes of data, data sourse more difficult for operating, the form fixed and other issues, this paper proposes a first of multiple data sources stored in a dedicated database pretreatment fractal dimension, and then dynamically generates reports through a combination of different dimensions and builds a B/S multidimensional dynamic structure of the reporting system based on J2EE technology. In the processing of the reports, the pretreatment for dimension statements provides a better solution for the massive data processing problems. Through multi-source data integration technology, the multi-angle, source dynamic support is implemented. The introduction of multi-dimensional analysis techniques meets the needs of users for data analysis better.
Keywords: computer application; data fusion technology; multiple data source; multi-dimensional analysis technique; multi-dimensional dynamic report

Title: A stochastic-Petri-net-based approach to quantitative modeling of semantic Web service composition

Authors: XIA Yunni, WANG Weifeng
PP: 1645-1650
Abstract: In this work, we present a approach for modeling the semantic Web services described in the ontology Web language for services (OWL-S) language. This approach employs Petri net as the fundamental means of modeling compositional patterns of semantic-Web-based services and defines a set of translation rules to map OWL-S elements into equivalent Petri net representations. They formally capture the main aspect of service invocation sequence and the control flow of the service composition patterns built on semantic Web. A case study based on a real-world OWL-S example is also conducted to examine the effectiveness of our proposed framework.
Keywords: computer software; ontology Web language for services; service composition; stochastic Petri net

Title: Design and implementation of charity carpool system based on iOS platform

Authors: ZHAO Weitao, WEI Zhiqiang
PP: 1639-1644
Abstract: According to the current social taxi to increasingly prominent and the low use of private cars in phenomenon, using the iOS intelligent terminal of high performance and high portability and access to the network anytime and anywhere, this paper puts forward a kind of public welfare car-sharing system based on the iOS platform. The system uses the various techniques of iOS, the hyper text transport protocol (HTTP) and message delivery mechanism to develop intelligent terminal program. This paper also solves the news docking problem of the passengers and drivers in the process of car pool, and uses the credit evaluation of functional carpooling behavior. Actual application shows that this system can effectively use the driver and passenger information in equivalence, improve the utilization rate of the private cars, and really get the assistance in need of help.
Keywords: computer software; iOS; carpool system; message delivery

Title: A new cluster head selection algorithm in WSNs based on node residual energy and communication cost

Authors: JIANG Xiaorong, TANG Zhibo, CHEN Wei
PP: 1633-1638
Abstract: Based on analyzing the hierarchical routing protocol for wireless sensor networks (WSNs), this paper proposes a new algorithm to chose cluster to extend the lifetime of WSNs. The algorithm takes into account the residual energy of nodes and cost of communication between cluster heads and ordinary nodes. Simulation results show that compared with low energy adaptive clustering hierarchy (LEACH) protocol randomly selected cluster head, the algorithm extends the network lifetime approximately doubled.
Keywords: computer network; wireless sensor network; cluster head selection; residual energy; communication cost; network lifetime

Title: Mobile IPv6 protocol with soft inter-domain handover for LoWPAN

Authors: HU Zheng, ZHU Yihua
PP: 1626-1632
Abstract: In this paper, a mobile IPv6 protocol with soft inter-domain handover, which is suitable for low-power wireless personal area network (LoWPAN) is presented. The proposed protocol is able to overcome the drawback in the existing MIPv6 protocols, i.e., the communications between a mobile node (MN) and its correspondent node (CN) may be interrupted due to the fact that the MN’s on-line care-of address changes before correspondent registration process is completed when the handover between mobile anchor points (MAPs) occurs. In this paper, a new mobility option is introduced for mobility signalings so that MAPs can discover the existence of CNs and complete the correspondent registration in time, which enables soft handover between MAPs and reduces the failure probability of the communications between the CN and the MN.
Keywords: computer network; mobility management; soft handover; mobile IP; Internet of things; low-power wireless personal area network

Title: A hybrid indoor localization system using RSSI fingerprinting and inertial positioning method

Authors: YANG Fan, LU Jialiang
PP: 1617-1625
Abstract: This paper designs and implements an enhanced indoor localization system which takes a hybrid approach with received signal strength indicator (RSSI) fingerprinting and inertial positioning method. At the same time, this paper also puts forward a dynamic activity area clustering method to improve the positioning accuracy of location fingerprinting. The experimental results show that performance of our system is increased by 35% compared to system only using RSSI fingerprinting. With the popularity of body area network devices with inertial sensors and wireless communication chips, we believe that this approach is very promising for personal indoor positioning system.
Keywords: computer network; wireless sensor network; indoor localization; received signal strength indicator fingerprinting; inertial positioning

Title: Load adaptation based on measuring passively

Authors: DAI Huichen, LI Yang, LU Jianyuan, TAI Dongzhe, LIU Bin
PP: 1604-1616
Abstract: This paper proposes an online traffic engineering method that balances the load among multiple paths according to the information (round trip time and link utilization) passively collected, i.e load adaptation based on measuring passively (LAMP). LAMP alleviates congestions by shifting the overspill traffic from over-utilized links to low-utilized links, and the transfer is based on the information collected in a passive manner, including data packet round trip time (RTT). However, it does not need to periodically probe the network or require excessive communications between routers, nor does it make any assumption on input traffic (traffic matrix) and network topology. Moreover, LAMP does not need support and can be implemented over existing routing protocols. Evaluation results show that LAMP can effectively reduce link utilizations, and meanwhile maintain favorable stability.
Keywords: computer network; online traffic engineering; passive measuring; multipath routing; load balance

Title: Extended forms of anti-control of discrete-time systems and their proof of chaos existence

Authors: YU Simin
PP: 1595-1603
Abstract: Chen-Lai algorithm and Wang-Chen algorithm are two typical methods for anti-control continuous-time systems. Based on Chen-Lai algorithm and Wang-Chen algorithm, taking sine function as a typical example, the corresponding two extended forms of anti-control of discrete-time systems are then studied respectively. According to the definition of snap-back repeller and Marotto theorem, the more general and rigorous mathematical proofs of chaos existence are further given for these two extended forms.
Keywords: chaos; ant-control; sine function; extended form

Title: Research and development on ISM frequency band wireless meter reading system

Authors: PAN Dangwei, TIAN Yafei, LI Yunpeng, ZHANG Jianhua
PP: 1587-1594
Abstract: At present, in consideration of the problems such as high cost, heavy intensity, complex wiring in traditional way of wired meter reading method and through the comparison with wireless technology, a wireless meter reading system based on single-chip microcomputer and wireless technology has been proposed. The upper computer of the system is based on Qt and the lower computer of the system is based on P89V51RD2 and P89LPC935FN microprocessor. With a wireless transceiver of CC1101 wireless communication chip, the wireless communication module is designed and the corresponding software is written, and finally achieves a real-time and high reliable wireless water meter data transmission. The wireless meter reading system proves to be accurate, reliable and convenient to complete data-collection, processing, processing, transmission, etc. It totally meets the requirements after designing, debugging and running 132 water meters from the negative first floor to the 17th floor in the second affiliated hospital of Lanzhou university.
Keywords: control theory; wireless meter reading system; graphical user interface; microprocessor; wireless transceiver; RS-485 communication control theory

Title: Energy efficiency optimization research for training-based MU-MIMO system

Authors: LI Shichao, QIU Ling
PP: 1579-1586
Abstract: This paper studies energy efficiency (EE) optimization in training-based multiuser multiple input multiple output (MU-MIMO) system and formulates an energy-efficient power optimization problem. Considering the channel state information at transmitter (CSIT) unavailable fact, this paper proposes a two-step optimization scheme which consists of the ergodic EE and instant EE optimization. In the ergodic EE optimization, this paper transforms the original problem into the optimization of the ergodic EE’s lower bound based on a derived tighter lower bound of the achievable rate. It is proved that this problem is jointly quasi-concave with respect to training power and data power, and then an alternating optimization algorithm is further proposed to solve it. In the instant EE optimization, the transmitter transmits the training with the power obtained in the ergodic EE optimization, which is used for channel estimation and result in imperfect channel state information. This paper predicts the instant EE and further proposes an instant EE optimiztion algorithm to optimize the data power. Simulation results show that our proposed two-step EE optimization algorithm can improve EE compared to the spectral-efficient scheme and the one-step scheme only with the ergodic EE optimization.
Keywords: basic subject of information science and system science; communication and information system; multiuser multiple input multiple output system; optimization; energy efficiency

Title: Research status of biomedical signal detection

Authors: JIANG Liying, YUE Baolei, LIANG Mao, WANG Fenfen
PP: 1572-1578
Abstract: According to the characteristics of biomedical signals, research status，development tendency and composition of biomedical detection system were expounded. The time domain, frequency domain and time-frequency domain of processing method were introduced in biomedical signal detection. The key issues and promising approaches of affection of sensor and electrode for measuring state faced biomedical detection, artifacts and interference, processing method and physiological parameters were put forward and analyzed. Furthermore, the multi parameters, manufacturing technology, automation, precision, measurement level and other aspects of the technology development trend of biomedical signal detection were prospected.
Keywords: basic subject of information science and system science; biomedical signal; review; detecting system; signal processing; development trend

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