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February 30,2016
Volume 9,Issue 4
Pages -
Subject Area:Basic Subject of Computer science and technology,Computer Applications,Computer Software,Basic Subject of Information Science and System Science,Automatics Application,Autocontrol Technology,Communications Technology

Title: Measuring consistency of data-aware processes based on evenlogs

Authors: ZHANG Xuewei, SONG Wei, XING Jianchun
PP: 417-427
Abstract: The development of service composition and cloud computing has increased the attention on service-based data-aware processes. The consistency measurement between increasing variants of data-aware processes is significant to the detection of differences and integration of variants. Then, an approach is provided to quantitatively measure consistency of data-aware processes. This approach is based on three constraint relations between activities (partial order, mutual-exclusion and independence) and the weight of probability of activity occurrence in event logs. It can analyze consistency of data-aware processes from the two aspects of dynamic and static. A proof-on-concept tool is implemented to automatically calculate consistency of business process execution language (BPEL) processes based on event logs. Case study verifies feasibility and effectiveness of the proposed approach. Hence, the approach can well solve the problem of consistency measurement of data-aware processes.
Keywords: basic subject of computer science and technology; data-aware process; business process execution language; activity constraint graph; event log; consistency measurement

Title: Optimized render technology of vectorial indoor map on Android system

Authors: LIU Zheng, LUO Hong
PP: 411-416
Abstract: The rapid development of location based service (LBS) requires quick and fluent map display on mobile phones. However, the efficiency of the Android mobile phone system has been much criticized because of its hardware and structure system. To solve this problem, this paper proposes a solution which can optimize indoor vector map rendering from the perspective of software optimization. This paper will present prioritization scheme in three aspects. And we have done related experiments on Android mobile phones to verify the feasibility and correctness of these prioritization schemes.
Keywords: computer application; Android; vectorial map; performance optimization; double buffering; pre-loading

Title: Research and implement on embedded power management based on MPC8280

Authors: DUAN Jintao，LIU Xiaohong
PP: 405-410
Abstract: Aiming at the currently lacking the endurance of embedded equipment, the author proposed a software power management scheme for the MPC8280 embedded target board and VxWorks operating system based on time sequence optimization, which enhanced the electrical energy use efficiency and provided new ideas for prediction algorithm in embedded collar domain research. The power management scheme divided the MPC8280 target board into the board support package (BSP) module, the drive module and the prediction module, and completed the data exchange between the modules through the flash storage device. The prediction algorithm used a combination of time series prediction and application control strategy, which optimized the traditional algorithm for large data processing. Experimental results showed that the realization of the power management scheme could large lifting equipment life time. At the same time, the power management system had less invasive and high portability, which could help other scholars to study further on the basis of this research.
Keywords: computer application; embedded system; power management; MPC8280

Title: Implementation of enterprise online IT operation and maintenance management platform based on ITIL

Authors: WANG Lianqing, NIE Jing, CAO Min, CHEN Kebin, LI Yuansheng
PP: 398-404
Abstract: With the rapid development of enterprise information construction in China, the traditional network operation and maintenance management means cannot meet the needs of IT operation and maintenance management. This paper analyzed the status quo of domestic enterprise IT operation and maintenance management, and based on information technology infrastructure library (ITIL) operation and management framework, the solutions of integration IT operation and maintenance management platform was introduced by using of B/S structure and BMC Remedy service management development platform to achieve automation, intelligent, efficient IT operation and maintenance management, which could effectively improve the quality and efficiency of enterprise IT operation and maintenance management.
Keywords: computer software; IT operation and maintenance management; ITIL framework; B/S structure mode; integration

Title: Component-based design of the software system formineral flotation monitoring

Authors: CAI Mingyue, YANG Chunhua, ZOU Yulong, WANG Xiaoli
PP: 389-397
Abstract: In order to change the status of the low efficiency and high strength in the software system developing for mineral flotationmonitoring, it becomes anurgent demand to design a set of highly reusable system. In view of this situation, in this paper, based on the introduction of the field modeling method and component technology, demand analysis to system for themineral flotation monitoring is firstly carried out. And then according to the common demand for design of the software system, the function modules of the system are given. Domain model of the software system formineral flotation monitoring is set up using the modeling method based on multilayer extended feature model. Finally, use the component development technique of software, the software system is modularized into a set of independent basic components, and the components management function is also designed. So, the low cost and high efficiency development of the flotation monitoring system is realized.
Keywords: software engineering; component based software development; domain modeling; software reusability

Title: Random fluctuation of the probability density function of the consistency indexes of the pairwise comparison matrices

Authors: CHEN Jingqiu
PP: 383-388
Abstract: In this paper, the consistency of the pairwise comparison matrices in analytic hierarchy process (AHP) was statistically studied. It is shown that the consistency of the pairwise comparison matrices has only very small probability, or even almost zero probability. Based on the comparison matrix samples calculated from the Saaty array of randomly selected elements, the density function of consistency of these matrices were given. These curves all show very chaotic and very strong fluctuation.
Keywords: systems engineering; analytic hierarchy process; pairwise comparison matrices; consistency; probability density

Title: Study on 4G service user adoption behavior

Authors: ZHANG Shuai, ZHENG Wenfu
PP: 372-382
Abstract: Based on task technology fit model and the technology acceptance model, this paper builds the 4G service user adoption model, studies the key factors influencing the user adoption behavior, and acquires data and the empirical analysis in the form of questionnaire. The results show that the task technology fit degree, perceived usefulness, perceived ease of use, the individual innovation and perceived cost have a significant influence on 4G user adoption behavior. Finally, according to research conclusion, in view of how the operator to develop 4G effective customer, we provide some advice marketing strategy and improvement direction. This paper also discusses limitations and future research direction.
Keywords: basic subject of information science and system science; 4G service; user adoption; task technology fit model; technology acceptance model

Title: Cold hot water mixer based on CFD and single neuron PI control algorithm

Authors: LIU Shuangshuang, XU Yuanyuan, XIAO Jianmei
PP: 364-371
Abstract: Using computational fluid dynamics (CFD) method, the test time and cost can be effectively shortened to research the characteristics of the controlled objects. In this work, taking FLUENT 6.3 software as a platform, a single neuron PI control function is compiled by user-defined function (UDF) for the nonlinear hot and cold water mixture. A closed-loop control of temperature within the system is achieved by the simulation. The simulation results show that, compared with conventional PI control algorithm, the dynamic performance and steady-state accuracy are improved by adopting the single neuron PI control algorithm.
Keywords: automatics application; computational fluid dynamics; user defined functions; single neuron PI control algorithm

Title: An input-variable weighted modeling method for soft sensor of biomass in nosiheptide fermentation process

Authors: YANG Qiangda, ZHAO Qiang
PP: 357-363
Abstract: It is hard to measure the biomass on-line in nosiheptide fermentation process, which brings difficulties to control and optimization of this process. Aiming at this problem, soft sensor technique was applied to fulfil the on-line estimation of biomass, and an input-variable weighted modeling method was proposed. Based on the unstructured model of nosiheptide fermentation process, the input variables were selected according to the implicit function existence theorem. Next, a soft-sensor model representing the functional relationship between the input variables and biomass was developed using artificial neural networks, where the weight of each input variable as well as the weights and thresholds of the corresponding neural network were determined simultaneously by the particle swarm optimization (PSO) algorithm. Experimental study was also carried out based on the practical production data from a lab-scale nosiheptide fermentation process. The testing results show the effectiveness of the proposed method.
Keywords: autocontrol technology; soft sensor; input-variable weighted; nosiheptide fermentation process; neural network; particle swarm optimization

Title: Dynamic joint scheduling algorithm of eICIC and carrier aggregation in LTE-A HetNet

Authors: XUE Mei, ZOU Suling, ZHAO Xinsheng
PP: 349-356
Abstract: In this paper, we proposed a joint dynamic scheduling algorithm of enhanced intercell interference coordination (eICIC) and carrier aggregation in LTE-A heterogeneous network (HetNet). Firstly, the algorithm adds a guarantee factor for real time (RT) traffic and an equity factor for non-RT traffic based on the M-LWDF algorithm. Secondly, in the initial carrier allocation, the carrier with the smallest aggregation head of line (HOL) delay is allocated to the user. In the scheduling process, empty carrier is allocated according to the principle of giving priority to edge user. Simulation results show that the proposed algorithm improves the edge user throughput, the fairness of the system and cell spectral efficiency. Compared to the Traditional algorithm, the average edge user throughput and the system fairness index have increased by 25% and 33%, respectively.
Keywords: communication technology; joint dynamic scheduling; enhanced intercell interference coordination; carrier aggregation

Title: A handover scheme based on mobility prediction for LTE-A heterogeneous networks

Authors: ZHANG Danyu, ZOU Suling, ZHAO Xinsheng
PP: 339-348
Abstract: To solve the problem of too early handover, too late handover and ping-pong handover caused by the fast fading of the received signal in the LTE-A heterogeneous network (HetNet) system, this paper proposed a handover scheme based on mobility prediction. The proposed scheme chooses the effective prediction algorithm based on the user’s mobility rule in two different mobile scenarios, selects the target cells and reserves the resources for the handover process of the user in advance. Simulation results show that the accuracy rate of two mobile scenarios’ mobility prediction algorithm is 98%. Compared to the traditional LTE-A handover scheme which selects the target cell based on the A3 event, the proposed handover scheme can improve the handover performance of LTE-A HetNet system, with the handover delay being reduced by 30 ms or 60 ms, the total handover frequency is decreased by 4.35%, and the handover failure rate is reduced by 7.44%.
Keywords: communication technology; mobility prediction; resource reservation; handover delay; handover failure rate

Title: Pilot-aided interference suppression algorithm in LTE uplink

Authors: XIA Xingyu, SHEN Wei
PP: 332-338
Abstract: There are several conventional interference suppression techniques on the system level of long term evolution (LTE) uplink architecture. However, the implementation of them are relatively complex, as they require corporation between adjacent cells. In this paper, interference suppression technique on link level is studied and a pilot-aided interference suppression algorithm is presented. The new method requires neither mutual collaboration between cells, nor the change in structure of the receiver. Simulation results show the superiority of the proposed algorithm in jamming environment. Theoretical analysis on the performance improvement and the impact of different algorithm granularity are also discussed.
Keywords: wireless communication technology; long term evolution; pilot-aided; interference suppression

Title: Application of ZigBee protocol stack in street lamp control sytem

Authors: ZHANG Yi, LI Kaining, CHENG Wei, WAGN Li，ZHENG Jing
PP: 326-331
Abstract: In order to slove the problem of capacity limitation and network security of ZigBee in street lamp control system, based on analyzing the process of network building and encryption in ZigBee, the measurement can be taken by breaking the hop limit to increase network capacity. Combianating network data encryption with encryption of personal area network ID (PAN ID), the security of network is improved. Finally, test results show that the ZigBee wireless network on street lamp control system is improved in network capacity and security. This designing provides an available solution for the problem of lighting control system in practical application.
Keywords: wireless communication technology; ZigBee; street lamp control system; capacity limitation; network security

Title: Minimum BER subcarrier and power allocation for multiuser MIMO-OFDM systems

Authors: MAO Jing, CHEN Chen, BAI Lin, XIANG Haige
PP: 318-325
Abstract: Resource allocation for multiuser multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) systems is an important issue to improve overall system performance. This paper investigates the subcarrier and power allocation to minimize the average bit error rate (BER) subject to a total power constraint. A unified optimal algorithm and suboptimal algorithm with low complexity are proposed for the zero forcing (ZF) and successive interference cancellation (SIC) detector. Simulation results show that the proposed suboptimal algorithm can achieve a better BER performance than the conventional algorithms that are known in the literature.
Keywords: wireless communication technology; communication and information system; multiuser MIMO-OFDM system; non-ideal detector; resource allocation; bit error rate

Title: Developments of integrate optical ring resonator

Authors: LU Yu, ZHANG Xiaoyang, QIAN Guang, ZHOU Huanli，ZHANG Tong
PP: 308-317
Abstract: Miniaturization, integration and large-scale are the goal of integrated optical systems and devices. Ring resonator has become one of the current research hotspots since it has the advantages of small size, low cost, high Q quality factor, stable performance and simple structure. Ring resonator can be widely used in the fields of optical communication and sensors. This review discusses the working principle of ring resonator and focuses on analyzing several typical and new structures. Then, the preparation process is introduced. Finally, the application of ring resonator is discussed.
Keywords: optoelectronics and laser technology; optical communication; review; optical sensor; ring resonator

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