bluuebunny/crossref_metadata_2025 huggingface dataset:
Research of the System Based on BP Network for the Prediction of Grape Disease
Authors: Bao Feng , Wang Juan , Ren Zhen Hui
Published: November 2013

The text introduced a system based on BP network for the prediction of grape disease. It included the design of a network structure, the selection of parameter for network study, the processing of sample data etc. With the use of BP network model, this system can forecast the extent of grape disease, so it is applicable to the conditions which have many influencing factors, complicated relationship, difficulty of analyze quantitatively and requirement of long-term prediction. Using this system to the prediction of grape disease in Zhuo Lu area Zhang Jia Kou city, the authors obtained a good effect, which is of value to the prediction of grape disease occurrence.
Space Vector Modulation with Simple Sector Judgement and Optimized Switching Loss
Authors: Zhang Wei Feng , Wang Rui Chun
Published: November 2013

A novel space vector modulation (SVM) method is proposed with a new approach to judge the sector of the SVM . To predigest complicated calculations of the SVM, the phase voltage signals are used to judge the sector. Discontinuous modulating function is used to reduce the switchings. The switching loss of the SVM is optimized, and the complicated judgement of the sector is avoided. The simulation and experimental results are presented to validate the SVM.
The Vehicle’s Lane-Changing Rules of On-Ramp System
Authors: Wang Gui Feng , Wu Ming
Published: November 2013

In order to observe the feather of traffice of on-ramp system in simulation experiments more truly, four different lane changing rules are presented based on the point of safe-distance. Experiment results show that the lane changing rules do have an important impact on the traffic flow of on-ramp system. The rule without safe-distance could make the capacity of the on-ramp section get its biggest value, while the capacity of upstream and downstream of main road both gets brought down; the rule considering forward and backward safe-distance could make the upstream section, downstream section and the whole system get their biggest value.
A New Approach for Solving Cluster Head Uneven Distribution in Wireless Sensor Network
Authors: Gao Lu , Li Zhong Min
Published: November 2013

In the applications of Wireless Sensor Networks (WSNs), the factor affecting the performance is energy consumption. In all operations in the WSN, Data transmission consumes a lot of energy because of its frequency. LEACH is proposed to reduce transmission distance. Cluster Head (CH) is selected randomly without any parameter, so CHs distribution is uneven and the distance between some nodes and their connected nodes is remote, which causes shortening system lifetime. In this paper, we proposed a new LEACH-based algorithm. The main purpose of new algorithm is to make CHs distribution even. In the improved algorithm, a node connects to a CH or acts as a temp CH based on the distance to the closest CH. The results of simulation show that improved LEACH algorithm increases energy efficiency and prolongs the network lifetime.
Research on Reasonable Bus Priority Method Based on Arterial Coordination Control
Authors: Wang Huan , Wei Li Ying
Published: November 2013

In the previous study, the bus priority control strategies only provide priority for the later bus, while ignoring the adverse effects of the early bus. This paper proposed a reasonable bus priority control strategy taking the arterial coordination control section as research object and aiming to the buses running schedule offset (positive, negative) minimum. Established a double-layer model for reasonable bus priority based on arterial coordination control, the upper layer is arterial coordination control, the lower layer is the bus priority control. In the arterial coordination layer, the detector detects the social vehicle flow data to optimize the communal signal cycle time, green ratio and phase difference; the reasonable bus priority optimization layer, specify the coordination phase green wave band limit as constraint conditions of adjusting the parameters of distribution, and establish the bus priority application model based on timetable, separately control the late and early bus without damaging the coordination phase green-wave.
Study on the Application of Data Measurement and Control Integrated Technique
Authors: Jiang Li , Sun Zhong Lin , Zhang Zong Bing
Published: November 2013

Measurement and control system usually set measurement and control module separately. In this paper, we give the technique combing measurement and control. Using computer integration, multithreading, the technique is based on data acquisition. The automatic control system of Hydraulic Support Experimental Bench successfully applies the method to realize the function of A/D conversion and DA/DO control. After the local operation, the system gains better response, measurement and control accuracy.
Auto-Disturbances Rejection Controller Design of Maglev Wind Tunnel System
Authors: Li Yuan
Published: November 2013

Maglev wind tunnel system is a typical nonlinear and unstable system. This paper has designed an auto-disturbances rejection controller to keep the wind tunnel system variables stable. Simultaneously, the mathematical model of maglev wind tunnel system has been established, and the simulation results denote that the novel auto-disturbances wind tunnel system controller can keep good dynamic capability and good robustness.
Detection Technology of Electronic Tongue in the Liquior Quality
Authors: Yao Yi , Yao Ya Chuan , Han Qiang , Song Hong
Published: November 2013

Electronic tongue is a new type of modern analytical instrumentation based on the human taste receptor research mechanism. Use the sensor array, as the biological sensing taste buds cells, to detect object,and to get results by the method of pattern recognition. Introduce the principles of electronic tongue, the study of several typical systems. Focus on the application in liquor quality, microbial detection, as well as some existing problems in the research development.
A Universal Adaptive Neural Control Scheme for Nonlinear Uncertain System
Authors: Ren Huai Qing , Liang Yan Chun , Shi Xiao Hu
Published: November 2013

The traditional BP algorithm is modified and a kind of novel model reference adaptive control (MRAC) scheme is proposed based on generalized BP (GBP) algorithm. The convergence of the control scheme is also analyzed according to Lyapunov theory. To test its effectiveness, the proposed model is used to control a nonlinear uncertain system. Simulation results indicate that the controller is effective in controlling a general class of nonlinear systems.
Chaotification of Three Different Behaviors in Mira 2 Map
Authors: Yang Zhi Yan , Jiang Tao
Published: November 2013

In this paper, we design a controller to chaotify Mira 2 map. To show the correctness, numerical simulations are given in three cases: Case 1, Mira 2 map which is period-1 orbit for some parameters is chaotified, Case 2, Mira 2 map which is converged to an attractor in infinity for some parameters is chaotified, and Case 3, Mira 2 map which is quasi-period orbit for some parameters.
The Intelligent-Control Strategies for the Rotational Inverted Pendulum
Authors: Su Xiao Lu
Published: November 2013

The inverted pendulum is a typical, multi-variable, nonlinear, strong-coupling, twirling and unstable system. Several intelligent-control strategies such as PID, feedback+Fuzzy and anfis neural-fuzzy were used to control the rotational inverted pendulum. The feasibility and validity were indicated by the simulation.
Package Chip Defect Reduction on Integrated Circuit
Authors: Seri Kulpiya , Angsumalin Senjuntichai
Published: November 2013

This research applies Six Sigma approach in order to reduce defect by increasing the assembly process capability index (Cpk) of Integrated Circuit (IC) production process. This study applies five phases (DMAIC) of Six Sigma approach beginning with define (D), measure (M), analyze (A), improve (I) and control (C) phases, respectively. The response of the research identified in the define phase is the chipped width with Cpk of 0.66 determined from the measure phase. The half-factorial experiments are implemented in the analyze phase to find the significant factors which are water temperature, water pressure and feed rate. In improve phase, the additioanl expriments are performed according to the Box-Behnken design in order to determine the non-linear relation between the chipped width and all mentioned factors. The optimal setting of each factors are determined by applied the response surface optimizer. Under the optimal setting, the control charts are used in the control phase to monitor the chipped width. The resulted Cpk of the response is increased to 1.39 which is greater than the one-sided accpetable process capability of 1.25.
Transient Simulation of Lightning Wave on Transmission Line
Authors: Ye Jun , Zheng Ke , Sun Hong Liang , Chen Yu
Published: November 2013

Lightning is the main reason to cause line tripping and service interruption, and its surge wave invaded into substation over the line is also the key factor which impact on the safe operation of equipments. Research on over-voltage transmission of lightning will be benefit to measure the lightning interference impact on energy metering equipments. Analyzing the transient process of the transmission line must adopt the telegraph equations. In this paper, the partial differential equations were discrete with the FDTD method. Then the equivalent power source of lightning is added at the starting point and the purely resistive load is added at the terminal. Finally, the transient propagation process of lighting was simulated in MATLAB. The three type of lossless non-uniform, lossy uniform or non-uniform transmission lines were considered.
High Birefringent Terahertz Photonic Crystal Fiber Based on Material-Filled Structure
Authors: Li Jian Hua , Huang Fei , Yang Yi , Zhang Bao Fu , Zhou Hua
Published: November 2013

A novel kind of high birefringent terahertz (THz) photonic crystal fibers (PCFs) with material-filled structure is proposed in this paper. Based on the material-filled technology, which different materials are selectively filled into four air holes of the inner first circle near the central core in the designed THz PCFs, high birefringence are obtained from the structural and material-filled induced asymmetry in large frequency ranges near 1THz. Modal birefringence with different structural parameters and diverse refractive indices of the filled materials are investigated by plane wave expansion (PWE) method. The numerical results show that high birefringence up to 10-3can be obtained and its structure is simpler than that of the early proposed highly birefringent THz PCFs. It is helpful for PCFs design and real fabrication in the potential THz applications.
Design and Implementation of USB Transceiver with Verilog
Authors: Zheng Li Kun , Chen Ya Li , Li Zhe Ying
Published: November 2013

The Universal Serial Bus Transceiver is one of the important functional blocks of USB controller, which can transmit and receive data to or from USB devices. In this paper, USB Transceiver is designed and implemented with Verilog HDL, This includes functions such as, data serialization, bit stuffing, NRZI encoding and NRZI decoding, bit destuffing, deserialization. The transceiver is simulated by the modelsim software and the simulation wave is gave.
Design of FIR Digital Filter Based on CSD Code
Authors: Li Guo Hong , Lang Wei Yan , Bai Xu , Hu Hui
Published: November 2013

A high precision FIR digital filter is achieved based on CSD code. The characteristic of CSD coding is described and the structure of the FIR filter based on time division multiplex is given. FIR filter coefficients is generated by fadtool of MATLAB . The digital filter module is designed by Verilog HDL and simulated under QUARTUS II and MATLAB environment. The results show that the design can improve the accuracy of data acquisition significantly and reduce the use of FPGA resource.
Design and Realization of the Small Power Two-Way DC Power Supply Based on UCC2800
Authors: Wang Yi Xiao , Qiu Li Jun , Cai Hong Zhuan , Li Long Fei , Yang Wei , Liu Yong , Bai Li
Published: November 2013

To provide DC power to auxiliary equipment for a certain type of aircraft, according to the actual need, small power two-way dc power supply is designed using current mode pulse width modulator UCC2800. This paper introduces the basic principle of UCC2800, and also introduces the design and realization process of the low-power dc power supply based on UCC2800.
Node Information Collection Routing Algorithm Using Mobile Agent in WSN Initialization Stage
Authors: Chen Jia Jun , Xing Chang Feng , Cheng Zhi Feng , Wang Xiao Bei
Published: November 2013

We propose a mobile agent fixed-direction one step routing algorithm based on modeling WSN node data collection task. This algorithm divides the data collection task into three stages to finish and they are searching start node for MA data collection, data collection and returning the sink node. MA determines the next hop node according to the surrounding node information sensed and current move direction information. Simulation result shows that the proposed algorithm can ensure that all nodes information in WSN is collected. Then, it can effectively reduce the total number of hops for information transferring and the node total energy consumption compared to LGF algorithm in C\S mode
The Design of Electric System Faulty Phase Selection Device Based on DSP
Authors: Wang Hai Xiang , Liu Shao Hua
Published: November 2013

According to faulty phase selection demand in the computer protection, DSP and AD7656 are used to make the voltage and current sampling, and make the data processing, select the faulty phase by symmetrical components selection method. The hardware and software design of the faulty phase selection device is provided. The overall hardware program and key design is given in this paper, meanwhile the software flow chart is given and the key algorithm is analyzed and interpreted.
Research on Congestion Control Routing Algorithm Based on Soft Preemption in Intelligent Optical Networks
Authors: Yang Ting Ting , Ma Xin Xin , Du Li
Published: November 2013

Studied the congestion control routing algorithm in the IONs, and proposed a novel algorithm called Novel Dynamic Weight based on Traffic Balance (N_DWTB) algorithm based on soft preemption. Simulation results show that these designs can improve the rate of resource utilization and decrease the blocking probability of the IONs.
Cooperative Retransmission Based on Network Coding with Fourier Matrix for Wireless Ad Hoc Networks
Authors: Chen Dai Mei , Fan Xi Hui , Wang Yu Mei , Du Yue
Published: November 2013

In wireless Ad Hoc networks, the combination of cooperative communication and network coding is an effective technique to improve the efficiency of retransmission. In most literature, nodes cooperated not fully, only as a relay, and XOR or random network coding had some shortage, such as, it was NP-Hard to achieve optimal coding strategy, can't ensure all lost packets can be encoded and the coding matrix must be full rank. This paper proposes a retransmission scheme called CRNCF. In this scheme, nodes cooperated sufficient, and used Fourier matrix's element as coding coefficient which can guarantee the solvability of receiving node, and packet's head only contain the row number of matrix. Simulation results show that CRNCF can improve the performance of the retransmission in aspects of throughput, security, collision probability, and cost of packet‘s head than other schemes.
Design of Switched Reluctance Motor Speed Control System Base on DSP
Authors: Li Xiao , Zhang Chao Hui , Fan Ying Jie
Published: November 2013

Switched Reluctance Motor has become one of hot topics of the international transmission for its simple structure,wide speed range and low cost, etc. In this thesis, based on TI's 32-bit DSP (TMS320F240) and following the principles of structure matching, high efficiency, easy to control, switched reluctance motor speed control system is designed using a minimum program of the main switching device. The parts of design include power converter, controller and software components.
A Comparative Study of Novel Permanent Magnet Arc Guideway Motors Based on Three-Dimensional Electromagnetic Field Analysis
Authors: Wang Kun , Zhang Gong , Wang Ying Pin , Zhou Xue Feng , Chen Xian Shuai , Liu Qiang , Feng Wei
Published: November 2013

A novel PM arc guideway motor (PMAGM) is developed due to the drawback of the conventional motor reciprocating within certain angle. The PMAGM can directly drive load to make reciprocating motion within a limited angle with advantages of simplification, reliability, high efficiency, etc.. Aiming at the permanent magnet (PM) magnetization and solenoid coil electrifying modes, the PM deflection angle is parameterized and the influence on electromagnetic force has been analyzed between different magnetization and electrifying modes. Results show that electromagnetic force in Y direction magnetized along the external field force lines at proposal 1 is 51.23% higher than that of vertical magnetization, and the electromagnetic resultant force increases by 45.91%. As the angle of the PM deflection within 3o, the electromagnetic force in X direction points to the right, which is not good for PM slidable assembly swing. Based on comprehensive analysis of the advantages and disadvantages of several electrifying modes, the electricity combination under full swing angle is optimized.
Review of Odor Source Localization Robot Based on Bionic Olfaction
Authors: Yang Lei , Zheng Jun Bao , Chen Jing Bo , Wang Ya Ming
Published: November 2013

This paper summarizes some current typical odor source localization strategies and algorithms. And their advantages and disadvantages are pointed out. Some typical olfactory robots and achievements are listed. It is pointed out that the current questions of odor source localization robot based on bionic olfaction are how to build an accurate gas diffusion model and combining multi-information technology.
Position Synchronization of the Biaxial System with a PID Neural Networks Control
Authors: He Wang Yong , Qiu Cong , He Jia
Published: November 2013

A new control algorithm based on incorporating proportion integration differentiation (PID) neural networks into cross-coupling technology is developed for position synchronization of biaxial system. The PID neural networks controller is be used to adjust control value injecting two velocity loops of the biaxial system.The learning algorithm of PID neural networks is demonstrate in theory. It is tested by simulation that the proposed control scheme can guarantee the stability and the effectiveness of the biaxial control system.The simulation results show that synchronization error is reduced to 35um from 56um.
Research on DC Motor Intelligent Control Algorithm
Authors: Fang Li
Published: November 2013

Based on analyzing the mathematical model of brushless DC motor and shortcomings of the traditional PID control, combining with the intelligent algorithm and the conventional PID, the paper gives a improved algorithm and simulations in MATLAB environment. A brushless DC motor PWM speed regulation system is designed based on high-performance MCU. The improved algorithm and the conventional algorithm control effects were analyzed and compared in the experiment.
A Control Architecture for Mission Re-Planning and Plan Repair of AUV
Authors: Zhang Ru Bo , Tong Hai Bo , Shi Chang Ting
Published: November 2013

This paper present a hybrid, hierarchical control architecture for mission re-planning and plan repair of autonomous underwater vehicle (AUV) navigating in dynamic and uncertain marine environment. The proposal carries out a component-oriented part-based control architecture structured in three parts: situation reasoning, re-planning trigger and hierarchical re-planning layer. Situation reasoning using the unstructured real-word information obtained by sorts of sensor detectes and recognizes uncertain event. According the event types and influence degree, the re-planning trigger decides the re-planning level. Hierarchical re-planning layer contains mission re-planning, task re-planning and behavior re-planning. Different re-planning level depends on the result of re-planning trigger. Preliminary versions of the architecture have been integrated and tested in a marine simulation environment.
Study on Customer Personality Characteristics and Relationship Outcomes Using SEM Analysis
Authors: Feng Xi
Published: November 2013

The purpose of this article is to empirically examine the influence of customer personality characteristics (need for social affiliation, customer relationship proneness) on relationship outcomes (customer trust, satisfaction, and loyalty). Online responses from service companies were gathered to assess the influence using Structural Equation Models (SEM). Results indicate that need for social affiliation is a strong determinant of customer relationship proneness and trust. Consumer relationship proneness has directly positive impact on trust and satisfaction. The results confirm the trust-satisfaction-loyalty paradigm in service context.
Research on Mobile Business Value Network and Model Construction
Authors: Sun Jie , Ren Wei An
Published: November 2013

The traditional mobile business value chain is based on linear thinking model mainly emphasizing technical guidance and enterprise sequence. Its characteristics constrain innovative thinking and innovative model of mobile commerce enterprises seriously. Under such a circumstance, the concept of value network was introduced into the mobile business field. By researching on documentation, the writer put in order relevant theories and models of mobile business value chain and value network, and further constructed mobile business value network model, which is formulated on the basis of value transmission perspective. The model enriched the prospective of research on mobile business value network, and provided scholars with theories for reference for further research.
Study on Discovery about Growing Potential Opportunity of Cybermediary Based on Fuzzy Hypergraph
Authors: Wang Qing Guo , Xia Shao Wei , Hui Hai Le
Published: November 2013

With the increasing development of e-commerce, the cybermediary faces serious challenges. As the significant event or state, growing potential opportunity restricts the development of the agency, so constructing suitable opportunity founding model has become an important problem facing to the decision maker. Based on fuzzy hypergraph theory, this paper studies on the model setting up process and model solving method in the growing potential opportunity discovery and introduces one simple application of the model with an information intermediary case.
Computer Simulation Study on Solubility of Three-Dimensional Polymer Multiple Chain System
Authors: Zhang Qun Li , Cui Lin Lin , Zheng Quan , Liu Li
Published: November 2013

The author adopts Monte Carlo compute method to simulate the linear polymer chain lattice model in multiple chain systems of chain length n=20, 50, 100 while the volume fraction Φ=0.125, and makes a research on the variational situation of the solubility with changing of the interaction energy between solvent molecule and polymer chain segment molecule εPS. The results indicate, the solvent become not benefit to solve, the polymer chain turn into the ruleless coil shape, and the polymer groups overlap across with the increase of the interaction energy εPS.
An Advanced LRU Cache Replacement Strategy for Content-Centric Network
Authors: Tang Bin , Zhang Guo Yin , Xing Zhi Jing , Wu Yan Xia , Wang Xiang Hui
Published: November 2013

In-network caching is one of the key aspects of content-centric networks (CCN), while the cache replacement algorithm of LRU does not consider the relation between the contents of the cache and its neighbor nodes in the cache replacement process, which bring worthless cache block in the cache and reduce the efficiency of the cache. An enhanced LRU cache replacement strategy has been proposed, which can replace the cache block in time that is not requested from other nodes and improve the rate of effective utilization of the cache space. Simulation results show that the A-LRU strategy increases cache hit rate, shortens the data request delay and improves overall network performance, verifies the validity of the A-LRU strategies in CCN.
The Read-Write Operation on Floating Point Data Program Design between MCU and KingView
Authors: Fang Cong Cong , Yang Xiao Jing
Published: November 2013

By employing the ASCII type communication protocols between MCU and KingView provided by WellinTech Inc, basing on the analysis of COM port setting and command format of read-write operation between MCU and the KingView, this paper design a read-write operation on floating point data program with C programming language and realize the real-time communication between MCU and KingView successfully, which improved the accuracy and scope of data transmitted between them. Data definition and some key subprograms like serial ports initialization, read floating point data from MCU, write floating point data to MCU are provided in the paper. It has high portability and application value.
Detection Device Construction and Analysis of Urinary Sediment
Authors: Li Kai Xiang , Feng Ji Hong , He Hao , Bai Hua Juan
Published: November 2013

The purpose of this paper is to put up a device for urinary sediment detection with a homemade microscope and a CCD, and to test the feasibility of the device. In this study, we use a capillary to absorb the urinalysis control (UC) which is diluted 500 times, and drip it into a counting pool of a urinary sediment quantitative analysis board (USQAB). In this setup device, we detect 30 counting pools in this analysis board with microscopic examination in total. Further, we count the number of red blood cells (RBC) and white blood cells (WBC) of every counting pool, and calculate the average number of RBC and WBC of 30 counting pools. Though this detection device, we are able to get 30 groups of imaging results clearly while the number of RBC and WBC in each counting pool fluctuates around the mean value. The result indicates that the setup detection device in this experiment is simple and feasible.
The Existing Problems and Countermeasures in the Development of Accounting Informatization in China
Authors: Zhang Ji De , Luan Yan Hui , Wang Shu Fang
Published: November 2013

Informatization is an inevitable trend in the world development. Accounting informatization is an important part of enterprise informatization. Focusing on the connotation of accounting informatization, this paper firstly analyzes the current situation of the accounting information in China. Then it points out the existing problems of accounting informatization in China. These problems include lack of understanding of the nature and importance of accounting informatization, lower overall quality of accounting personnel and the lack of integrated talents, realizing information resources sharing with difficulty, blind investment in accounting informatization construction and poor universality and standardization of financial software, and threatened data security. Finally it puts forward the corresponding countermeasures to promote the healthy development of accounting informatization in China.
The NAC System in the Smart Grid Systems
Authors: Zheng Ling , Wang Zhen Wei , Zhao Chang Song
Published: November 2013

During the process of the Smart Grid systems construction, the Safe Access Platform has an increasing important role. Not only could it meet the demand that people of power system can telecommute, but also provides different level of security mechanisms for various smart devices, such as Hand-hold Terminal System PDA, Ultra Mobile Personal Computer (UMPC) and Wireless Data Acquisition Terminal. Determining how to guarantee the internal security and meet the security requirements of access control based on roles is an important subject. The paper presents a new network access control system (NAC system) based on roles. According to the security metrics of the network access equipment (NAE), the NAC system has been designed and implemented to provide different safety strategies for different application scenarios. Besides, 802.1x and L2-IP are discussed specially as the most important key techniques of the implementation of the system.
The Real-Time Monitoring Technology Research of Deep Foundation Pit Displacement
Authors: Tong Zhi Wei , Deng Ru Feng , Cheng Li Wen
Published: November 2013

This paper studies the distributed data acquisition and processing technology based on wireless sensor network, and presents using a multichannel base station architecture to build wireless sensor network. The architecture can achieve data acquisition simultaneously for a long time in succession to all collection nodes, and transmit real time data to the monitoring center for data processing. The system is developed which could realize real-time monitor of the deep foundation displacement based on study.
An Algorithm to Update K-Dominant Skyline
Authors: Dong Lei Gang , Cui Xiao Wei
Published: November 2013

K-dominant skyline query technology reduces the result sets for a dataset with high dimensional spaces, which is more convenient for user to make decision. But all the existent algorithms are for static k, not suitable for dynamic k. To solve this problem, this paper proposed a new idea, updating the k-dominant skyline for new k by computing the partial points based on existent k-dominant skyline. Based on which, two algorithms are proposed for k increasing and decreasing. Furthermore, detailed theoretical analyses and extensive experiments demonstrate that the algorithms can effectively reduce redundant work, and keep the result correctly.
Using Different Term Weighting Schemes of Centroid-Based Classifiers to Classify Drug Monographs
Authors: Lertnattee Verayuth , Lueviphan Chanisara
Published: November 2013

With an increasing number of documents for drug monographs on the Internet, automatic classification of documents is an important task for organizing these documents into appropriated classes. The monographs of drug can be regularly categorized by their indications. A centroid-based classifier is a relatively high performance classifier with relatively less computation. To enhance the efficiency of standard centroid-based classifier with TFIDF to classify drug monographs, different term weighting schemes of a centroid-based classifier are evaluated. Moreover, the combination of a set of centroid-based classifiers with different term weighting schemes is proposed in this work. To evaluate the proposed method, two set of drug monographs are drawn from DailyMed and RxList websites are used. From the experimental results, the proposed method can improve the performance of the centroid-based classifier.
The Financial Management System Based on Android and SQLite
Authors: Feng Xing Li , Suo Zhi Hai , Wei Yao Tang , Xu Mo
Published: November 2013

SQLite is a lightweight database which is widely used in most of embedded devices becauseof its advantages such as open source, zero configuration, self-contained, server less, highly concurrent, etc. The Android application in this paper uses SQLiteOpenHelper to initialize the database and store many kinds of data types such as text, date, time, image into database. GalleryAdapter extended from BaseAdapter is used to write the image taken by camera and stored in SD card into the database table. The design of user interface is aesthetic and convenient. The user experience is favorable. It is a good choice for family financial management.
Adaptive Energy Efficient Cross-Layer TDMA-Based MAC Protocol in Wireless Mesh Sensor Networks
Authors: Fan Jing , Xie Jian Bin , Li Feng , Li Geng
Published: November 2013

Based on TDMA sleep scheduling scheme, by collecting cross-layer routing information and feedback information, according to the detection of routing information and neighbor information, the sleep slot and data transmitting slot are assigned orderly on TDMA based channel by Mesh router. The sending and receiving mutual interference collision is eliminated by slot allocation with collision avoid method. Moreover, path wake up strategy in terms of the nodes hop are introduced which can assign listen frame and wake up slot better. As a result, a TDMA-based energy efficient cross-layer MAC protocol for wireless mesh sensor networks are proposed, and then the performance of the protocol are analysis by simulation. The study results show that based on WMN and WSN, WSN and WMN can be constructed to achieve a full interconnection network named WMSN.TCP-MCA protocol can effectively reduce idle listen time of node which reduce overall energy consumption of the network.
Improved Congestion Control Algorithm in Wide Bandwidth and Long Delay Network
Authors: Liu Qiao , Yang Zheng Kun , Duan Gui Hua
Published: November 2013

With the idea of binary search increasing mechanism of BIC algorithm, an improved BIC (IBIC) algorithm is proposed by adjusting the congestion window with information of packet-loss and data delay, the flow chart and some important parameters are presented, the IBIC algorithm is carried out in Linux kernel. Moreover, the Linux-based network testing platform is constructed by utilizing squid to transmit data from server to clients in gateway, and using WANem to simulate the situation of bandwidth, data dropout and delay. By testing and comparing the congestion control capability of IBIC with other main algorithms, the IBIC algorithm is proved to increase effectively the network communication efficiency.
Free Volume Study of Severely Plastic Deformed Pure Fe
Authors: Forouzanmehr Nazanin , Nili-Ahmadabadi Mahmoud
Published: November 2013

There is a growing interest for investigation of free-volume type defects in SPD-processed ultrafine-grained materials. In the present work, excess free volume in pure Fe prepared by shaped rolling is studied by high-resolution differential dilatometer as well as Archimedes method. The results show the formation of excess volume with increasing deformation strain. The volume fraction of free volume detected by dilatometer is below the evaluation of Archimedes method maybe because of the existence of void in the deformed metal. Microstructural study by field emission type scanning electron microscope confirms the presence of voids.
Effect of Milling Time on the Formation of NiAl Nanostructure Intermetallic Produced by the Mechanical Alloying Process
Authors: Akbari Golam Hossein , Attarzadeh Hamid , Khajesarvi Ali
Published: November 2013

In the present study, NiAl nanostructure intermetallic produced by mechanical alloying process was investigated. Pure Al and Ni powders with the ratio of 50 at.% were mixed and milled in a planetary ball mill for different milling times in the range of 8 to 128 hours. The milled powder particles were investigated by XRD technique and scanning electron microscope. Williamson-Hall equation was employed to calculate lattice strains and crystallite sizes. The results showed that NiAl intermetallic formed after some milling times. The observation of flame or explosion in the vial just after the uncovering of it, in some cases, showed intense interaction between Al and Ni atoms after homogenization during milling. After longer milling time no flame and explosion was observed while NiAl intermetallics had been formed. Therefore, NiAl intermetallics were formed under different conditions with different structures and properties. The crystal sizes of obtained NiAl particles were less than 10 nm. The hardness changes in particles and also their internal strains were affected by milling operation at early stages of milling but they were mainly affected by transformation process of (Ni,Al) solid solution into intermetallic NiAl at longer milling times.
Preparation and Characterization of Polystyrene/TiO2 Core-Shell Nanospheres via Suspension Technique
Authors: Shahshojaei Mona , Behniafar Hossein , Shaabanzadeh Masoud
Published: November 2013

In the present work, at first, nanoTiO2particles in anatase form were effectively surface modified via reacting with NCO groups of 4,4-methylenediphenyl disocyanate (MDI). Secondly, a solution of azobisisobutyronitrile (AIBN) (0.1 g) in inhibitor-free styrene (10 g) was poured into a 150 mL flask containing poly (vinyl alcohol) (PVA) suspending agent (0.1 g) in deionized water (60 mL) under N2flow, while stirring. The reaction mixture was then heated to 80 °C, and stirred for another 1 h. Next, it was divided to two portions; one for the synthesis of pure PS, and the other for the synthesis of PS/TiO2nanocomposites. Each aqueous portion was individually mixed with dichloromethane in a separating funnel. For PS/TiO2nanocomposites, the organic phase was charged with nanoTiO2particles (MDI-treated and/or untreated) (0.05 g), and then fully homogenized using ultrasonic homogenizer. Methanol non solvent was eventually used to precipitate the products. All samples involving pure PS, PS/surface modified TiO2nanocomposite, and PS/surface unmodified TiO2nanocomposite were thoroughly washed, filtered, and dried in vacuum at 50 °C for 12 h. From SEM images a core-shell relation could be clearly detected between the nanoTiO2particles and PS matrix. Meanwhile, the surface modified TiO2was dispersed into the PS matrix with better homogeneity compared to that of unmodified one. Undoubtedly, beside the surface modification factor, PVA suspending agent as an effective nanosized particle stabilizer, too, played a basic role in this high homogeneity. Also, FT-IR and XRD analyses led to promising results.
Synthesize and Investigation of the Catalytic Behavior of Ir/γ-Al2O3 Nanocatalyst
Authors: Pakdehi Shahram Ghanbari , Rasoolzadeh Maryam , Zolfaghari Reihaneh
Published: November 2013

Hydrazine is an interesting reducing agent which is used in considerable number of different industrial catalytic applications including gas generators, pure hydrogen production for electric fuel cells and monopropellant thrusters. Hydrazine is a highly reactive molecule that decomposes at low temperature on many metal surfaces e. g. iridium, rhodium and tungsten. But the standard commercial catalyst used for decomposition of hydrazine is shell 405 which contents from high metallic content of iridium supported on gamma alumina. In the present study, iridium nanocatalysts based on gamma alumina with metallic content of 20 wt% have been synthesized by the incipient wetness impregnation using H2IrCl6.xH2O as precursor. The pretreatment effects on the metallic accessibility on the Ir/γ-Al2O3 have been evaluated. After ionic exchange, impregnated supports were calcined in air flow and the n followed by reduction in hydrogen flow. The prepared nanocatalyst has been identified using specific surface measurement (BET), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The catalytic mechanism was also briefly discussed. The main goal of this work is prepare, characterize, and determine the nanocatalytic behavior of iridium supported on gamma alumina in decomposition of hydrazine process. The results of this study show that the performance of synthesizes nanocatalyst is suitable for decomposition of hydrazine; however it is need of further investigation. The results indicate that however our synthesized nanocatalyst demonstrates a good job in hydrazine decomposition; some promoters had yet to be tested due to enhancement of economic efficiency.
Design and Simulation of a Proposed Position Sensitive Nano Gas Detector
Authors: Delbari Mohammad , Saramad Shahyar
Published: November 2013

The micro GEM is a position sensitive gas electron multiplier detector with high-density and regular arrangement of holes inside a insulation foil The new idea for decreasing the applied voltage with the same electric field and also get rid of the complexity of producing regular arrangement of micro holes, is the dimension reduction of the GEM to the range of nanometer. The proposed method for producing this nanostructure is anodization of the aluminium. The simulation results show that although the nanoGEM has typically less gain in comparison to micro GEM, but with applied voltages in order of few Volts, high gains can be achieve by multiple nanoGEMs. This novel idea which can be used for production of low voltage and portable position sensitive detectors has higher spatial resolution in comparison to commercial ones.
Efficiency Increasing of Thermoelectric Micro Generator Using Carbon Nanotube Interface
Authors: Salami Mitra , Sheikholeslami Tahereh Fanaei , Fathi Samira
Published: November 2013

Thermoelectric (TE) devices are an interested family of energy harvesters which could convert the thermal energy into electricity. However, the temperature drops at interface between thermoelectric materials and heat source, heat sink and electrodes reduce efficiency of thermoelectric devices. As a solution, thermal interface materials (TIM) which have high thermal conductance and low thermal interface resistance with adjacent materials are added to the device. In this paper, the organic material is considered as the base material for a TE energy harvester device. Also, carbon nanotube (CNT) is applied as TIM, because of its high one dimentional electrical and thermal conductance. A finite element analysis is carried out in order to investigate the role of thermal contact resistance on heat transfer at TE device. To do this, a thermoelectric leg is simulated with two structure consist of (a) TE material and electrodes in direct contact (b) TE material and electrodes with CNT interface and the results are compared. It is shown that CNT layer reduces heat dissipation at the interface and so the temperature difference at the both sides of polymer is increased, which finally results the enhancement of device output voltage.
Numerical Study of the Zinc Oxide Nanowire Geometry Effect on Nanogenerator Output
Authors: Fathi Samira , Sheikholeslami Tahereh Fanaei , Salami Mitra
Published: November 2013

Piezoelectric nanogenerator (NG) made of nanowires (NWs) is a suitable device for harvesting ambient mechanical energy, applicable for self-powered electronic systems and nanodevices that operate at low power. The coupled piezoelectric and semiconducting characteristics of the zinc oxide (ZnO) NW cause an output voltage generation that made it interesting to use as an energy harvesting device in nanoscale. In this paper, the piezoelectric potential distribution in a bent ZnO NW is investigated, numerically. To do this, a three-dimensional finite element simulation of the device is performed and the results are analyzed and discussed. It is found that the output piezoelectric potential, for a constant nanowire length, is decreased as the diameter of ZnO NW increases. Study on the effect of NW diameters shows the potential will remain constant for nanowire with aspect ratio below 15. Further, the NWs are considered with an inclination of 20 degree relative to the substrate to study by applying force in different directions. The latter indicates an improvement on the output piezoelectric potential. The obtained results show that the ZnO NW can be used as a good energy harvester device by considering a suitable diameter, length and with a justified inclination angle.
Nanosecond Pulsed Laser Heating of Colloidal Copper Nanoparticles in Water
Authors: Malek Samaneh , Poursalehi Reza
Published: November 2013

In this study, localized heating of homogenous spherical copper nanoparticles surrounded by water on exposure to short laser pulses is investigated. We are intended to estimate the maximum temperatures of nanoparticles by calculating the absorption efficiency and absorbed energy with some radii in the range 1-50 nm at the laser wavelengths of 248 and 633 nm using Mie theory. The dependency of the melting temperature of nanoparticles upon the particle size is also considered. Our calculations show the appropriate laser wavelength and nanoparticle size which are preferred for large area heating, localized heating without thermal damage or completely localized destroying of small amount of species and polymeric materials modification. The significant temperature rising and the heat transfer to the immediate vicinity is of exceptional interest in selective cell targeting, diagnosis and therapeutic applications, surface modification, and particle removing below damage threshold energy of surrounding media.
Antibacterial Properties of CdO Nano-Cubes Synthesized via Microwave Method
Authors: Rashidzadeh Mehrdad
Published: November 2013

High purity Cadmium (Cd) metal was used as raw material and placed in a microwave susceptor. an evaporation/oxidation process occurs under exposure to microwave in less than 2 minutes. Then, Evaporated cadmium reacted with oxygen and cadmium oxide was collected on the inner surface of a glassy container that was placed a few centimeters above the susceptor. Morphological and structural information of As-synthesized CdO nanopowder, were investigated via SEM and X-ray diffraction (XRD) spectroscopy. The antibacterial activities of different concentration of the CdO nanoparticles were tested by treating Escherichia coli (Gram negative) cultures with CdO nanoparticles. The Study indicates that cadmium oxide nanoparticles show effective antibacterial activity toward the gram-negative bacterium E. coli. Electrochemical properties of as-synthesized powder were investigated via linear and two vertex cyclic voltammetery in the presence of ethanol, a pair of Oxidation/reduction peaks were achieved.
High Loading of SiO2 Nanoparticles to Investigate Optical and Mechanical Properties of Polyurethane Open Cell
Authors: Nadafan Marzieh , Malekfar Rasoul , Izadi-Darbandi Ali , Dehghani Zahra
Published: November 2013

In this research the composition of polyurethane open cell (PUOC) with two concentrations of SiO2 nanoparticles (1 and 2wt. %) have been prepared. Optical microscopy imaging, watering uptake, FTIR and Raman spectroscopy of the synthesized samples were measured. The optical microscopy imaging of samples showed differences in the appearance of matrix by applying of different amount of SiO2 nanoparticles. Variations of the water uptake of specimens were related to the function of SiO2 nanoparticles (NPs) and their concentrations. The degree of phase separation and the hydrogen bonding index in samples were evaluated in terms of their FTIR spectroscopy data. The apparent and real densities of foams were measured and then total porosity, open porosity and close porosity of samples were calculated. According to creating voids in polyurethane, the apparent and real density has different behavior by adding of SiO2 nanoparticles (NPs). The open porosity of samples is increased by adding the amount of nanoparticles but the close and total porosity are decreased.