bluuebunny/crossref_metadata_2025 huggingface dataset:
A Novel DSR-Based Protocol for Small Reconnaissance UAV Ad Hoc Network
Authors: Li Juan , Liu Xiao Cheng , Pang Yue Feng , Zhu Wei Wei
Published: June 2014

Based on the traditional DSR Protocol has obvious drawbacks such as short network lifetime in the small reconnaissance UAV ad hoc network, a routing protocols called UEDSR(UAV Energy Dynamic Source Routing Protocol) suitable for small reconnaissance UAV ad hoc network is proposed. This protocol introduces the energy balancing mechanism into the algorithms based on DSR, then improves the situation of excessive energy consumption of hot nodes and prolongs the network lifetime. The simulation of protocol by NS2 illustrates that comparing to DSR the UEDSR protocol achieves about 7% increase in the network lifetime and the packet delivery and the average of network throughput are effectively improved.
A Terrestrial Digital Broadcasting and Positioning System Based on Overlap Communication
Authors: Wu Guo Cheng , Yang Zhan Xin , Xu Wei Zhang
Published: June 2014

Inspired by the overlap communication theory, a new onshore radio positioning system which superimposed on terrestrial digital transmission system is proposed in this paper. This system overlaps but not affects existing terrestrial digital broadcasting.At the receiver, a reconstruction/cancellation algorithm.is implied to capture the navigation signal and positioning measurements precisely.This paper focus on the construction of overlap system,spreading navigation signal and the capture of positioning measurements.We give a method to generate spreading navigation signal and overlap with terrestrial digital transmission system.The method can reduce the performance degradation due to pilot interference. We also proposes a reconstruction/cancellation algorithm which can solution the capture performance deterioration caused by overlapped system . The simulation results show that this system proposed in this paper can be used in terrestrial digital transmission system and provide good positional function.
Technology Research about Beamforming of Multiple-Beam Array Antenna
Authors: Pan Gao Feng , Liang Sheng , Xue Hao , Xu Guang Ming , Xu Xing Yuan
Published: June 2014

Active phased array antenna (APAA) can realize multi-object tracking and the beamforming is the key technology. Multi-area array and the implement method of its beamforming are introduced in this paper. Coordinated transformation formula is offered based on engineering practice and beams are synthesized by beamforming algorithm of low sidelobe. Following simulation shows results about beam coverage, those provide theoretical basis for the further research.
The Oxygen Concentration Measurement of an Aircraft Fuel Tank Inerting System
Authors: Cai Yan , Lin Gui Ping
Published: June 2014

There are several oxygen concentration measurement methods applied in aircraft fuel tank inerting systems. In this work, an aircraft fuel tank inerting experiment system was built and oxygen concentration of the fuel tank ullage (fuel tank space above the surface of the fuel which is filled with fuel vapor and air) and the dissolved oxygen in the fuel was detected with the methods of light absorption and optical fluorescence. The experiment was conducted through different operating conditions and results has illustrated that the light absorption method as well as the optical fluorescence method has the same accuracy sensing calibration gases, but the suitable condition of the two methods are different. Results have shown that the method of light absorption is more suitable to test oxygen concentration of gas mixture, and the method of optical fluorescence is more suitable to detect the concentration of dissolved oxygen in liquid substance.
Insider Threat Detection with Behavior-Based Attestation
Authors: Qin Heng , Zhao Jin Hui
Published: June 2014

Insiders, who have the lawful authority in network information system, formed a huge threat to security by abuse and misuse of authority. It has become one of huge challenge to the security of information system. Against the features of more subtle and more difficult to find, this paper study how to perceive the trusted behavior of insiders with behavior-based attestation. Taking into account the impact of various uncertainties in monitoring and perception process, dynamic awareness model of insider threat is presented based on subjective logic. In order to find the insider threats, monitoring data of actual behaviors are compared with operation tree; legality of the user behavior dynamically analyzed according to historical experience and current experience; the trust of user behavior legitimacy is represented as trust point in subjective logic. Finally, experiments are employed to test the validity and applicability of proposed method.
NGI-Oriented Measure and Control System of Agriculture IOT
Authors: Wu Zhuang , Zhao Yun Feng , Lu Yuan
Published: June 2014

Agricultural IOT (Internet of things) is the integration of modern information and communication technology in agriculture. Based on 6LoWPAN wireless sensor networks, this paper puts forward a real-time monitoring system to agricultural environment, in order to improve the function of modern agricultural greenhouse control system. This system uses the 6LoWPAN as backbone to reach the goal of point-to-point communication between NGI (next generation Internet) and wireless sensor networks signed with IPv6. It is no specific gateway to protocol transition and carrying which makes it possible to realize real-time monitoring and controlling of agricultural environment, reduce energy consumption, shorten the delay time.
Research on Content Distribution Mechanism of MP2P Networks
Authors: Zhang Guo Yin , Liu Yan
Published: June 2014

In consideration of the current MP2P network disturbance from frequent location changes of the mobile nodes, the limited computing power and storage capacity, this paper proposes a flexible strategy of partition management by assigning different functions to nodes according to some standards, regarding a subnet as a unit and using super-nodes to manage subnets. In order to speed up the data transmission and replacement efficiency, data is processed with partial network coding technology. Additionally, a trans-subnet query algorithm is proposed to link subnets, conduct information exchange between subnets and resource location. Results of the experiment manifested that this strategy can efficiently increase the resource download success rate and hit rate, reduce the average delay, improve the content distribution efficiency of MP2P networks, and simultaneously enhance system robustness.
Research on the Connectivity of Network
Authors: Sun Lei
Published: June 2014

Based on the characteristic of real network, this paper introduces traffic routing model, uses the capacity of network to measure the connectivity of network, establishes connectivity research model and finally we analyze the method for determining the capacity of network, and the relation between the connectivity of network with the capacity of each node (C) through simulation. Conclusions are shown as following: (1) It is feasible to use the capacity of network to measure the connectivity of network. (2) The capacity of network is measured by the critical generating rate Rc at which a continuous phase transition will occur from free state to congestion. (3) The connectivity of network is positively related with C, and the capacity of network shows a linear growth with the increasing of C. Results show that this evaluation of connectivity can better reflect the connectivity of real network, and well meets the research needs of real network.
Analysis of Security of SCADA System
Authors: Li Qing Xue , Mu Long Hua
Published: June 2014

SCADA (Supervisory Control and Data Acquisition) is an important concern about national security of our country and its security professionals. During those early days, a so called "security by obscurity" helped provide a palpable layer of cyber security and defense and a general feeling of immunity kinds of security problems that have started emerging networks to emerge in the mid 1980's, starting with the known Morris Worm. However, with the global standardization of TCP/IP protocol, and for the past 20 years, with the migration of autonomous systems SCADA interconnected power grids, security risks have increased exponentially. The security officials can no longer rely on the isolated nature of these systems to provide protection. Unfortunately, the security of SCADA systems has not kept pace with advances in computer technology. According to a 2003 report by Sandia National Laboratories, the SCADA security is generally five to ten years behind compared to typical systems of information technology. As threat, the contradictory range has expanded to include not only domestic but foreign terrorists, disgruntled internal, organized crime and even international competitors. This volatile convergence of global computer network and critical weaknesses in the operating system and application software system are well understood by opponents. Although a catastrophic failure is unlikely, these risks could be very problematic and cause disruptions in essential services and billions of euros in losses. This study includes a description of the state of the art of attacks against these systems and the reasons for the vulnerability of these systems. [1, 2, 3]
Are Big Classes in Java Bad? the Effect of Classes Size on Software Quality in Java
Authors: Zheng Tian Jian , Zhang Wei
Published: June 2014

This report discusses the evidence for the claim that “big classes in java are bad”. In other words, there are some evidences for the negative impact of classes size on software quality.
Formal Approach to Enhance the Reliability of Embedded Software System
Authors: Shi Hai He , Shi Hai Peng
Published: June 2014

Software formal method is a mathematics-based technique for the specification, development and verification of software systems, and has been viewed as an important way to guarantee the reliability of final product. Reliability of Algorithms in embedded software system is in high demand. The paper introduces an algorithm formal approach suitable to the development of embedded software that will enhance its reliability, and as a case study an algorithm has been formally developed.
Software Design of Smart Home Terminal System
Authors: Sun Bao Gang , Jiang Yu Chuan , Yang Fang Quan , Jin Zhi Xiong
Published: June 2014

Existing smart home has been difficult to achieve the degree of public information automation and convenience of home environment requirements, smart home is a new field of networking technology applications. This article discusses how to use networking technology to the field of smart home, smart home study architecture in a wireless communication technology to solve the traditional home system using wired communications evils. Meanwhile, combine Bluetooth wireless smart home study based on the design of a kind of Bluetooth technology based smart home controller.
Study on the Key Technology of the Coastal Waterway Long-Distance Tide Extract and its Software Realization
Authors: Wang Sheng Ping , Li Yan Feng , Li Xiao Yu , Qin Hai Bo
Published: June 2014

In this paper, we developed a tide extraction software system which is based on GPS RTK / PPK and MRU (Motion Reference Unit) . Firstly, we analysis the quality control and the attitude correction which are the most important key technologies in this software . At the same time, the frame of the whole system, the computer environment, the software development tool are also analysised in detial in this paper. Finally, the stability and accuracy of this software system are verified by the experiment in Guangdong Yamen coastal waterway .
The Dynamic Function Calling Path Generation Based on Instrumentation
Authors: Xu Ai Ping , Mu Yong Min , Zhang Zhi Hua , Li Hui Li
Published: June 2014

Path coverage testing is almost impossible to achieve because of the large number of paths. The function calling path coverage analysis method can guaranty adequate test coverage rate effectively on the precondition of unit testing completion. Based on function calling relations, the methods of dynamic generation function calling path is proposed. For cycle and recursive calling, design instrumentation rules and probe function, complete source code instrumentation, ensure the stub point flow can trace to the function calling relations. The function calling path generation algorithms were designed to split the stub point flow to the dynamic function calling path. Experimental results show that the dynamic function calling path generation method based instrumentation can extract the function calling paths which are executed by test cases and gain the coverage of information automatically.
A Linux-Based Technical Implementation Model for Data Capturing
Authors: Xu Lei , Cao San Xing , Tang Bai Hui
Published: June 2014

This paper presents a technical implementation model for data capturing scripts in PHP to be efficient in the environment of a browser, Apache and MySQL. Traditional PHP scripts are usually run within the environment of the Apache OS and MySQL database, through a browser. This will lead to a substantial time limit when Apache runs. When the data to be captured by the PHP script is large, Apache will not be efficient enough to grab all the data and update the data into the database. In this paper, we use the shell scripting language to call PHP language in the terminal under Linux environment, and then grab the weather conditions in various cities in China, hence achieving the data capturing objectives, and update these data into the database in real time.
A Novel Combinatorial Ant Colony Optimization Algorithm with Detection Zone Rule
Authors: Bai Ya Nan , Shi Yong Chang , Shi Xiao Yu
Published: June 2014

For solving the Ant Colony System own inherent defects, this paper proposes a novel combinatorial ant Colony Optimization algorithm with detection zone rule. In the proposed algorithm, the pheromone and the search path are modified dynamically. By using the detection method, the artificial ants are detected automatically per m iterations during the detection zone. When the ant colony falls into the local optimum, the variable will be adaptive modified by the algorithm. Meanwhile, for improving the search abilities of artificial ants, it changes the global rate of pheromone evaporation and the maximum and minimum of pheromone, respectively. The performance of the novel algorithm is conducted, and the comparison among the original Ant System (AS), Ant Colony System (ACS) and proposed algorithm is shown. The experiment result demonstrated that the CACOD has a better performance than ACS in term of the capability of search and ability of restrain stagnation.
Design and Implementation of the Smart Home App Based on the Android System
Authors: Ma Yong Kui , Wei Yu Ming , Zhang Shuo , Li Wen Jia
Published: June 2014

Aiming at enhancing the portability of the smart home management, it is an effective way to use the mobile terminal such as the mobile phone to control the smart home remotely. In addition, properly designed application on the mobile phone can give convenience to monitor the smart home as well as improve the user experience. In this paper, after a comprehensive analysis to the functions of the smart home, a related application based on Android is presented using the scheme of modular design. The application has the functions of monitoring the remote data and controlling the appliances in a long distance. Meanwhile, it can also realize the access control. The test of the application shows that it can receive the sensor data timely and make a proper control of the appliances, which means that it has realized the desired targets.
Semantic Clustering and Similarity Calculation for Social Tagging Systems
Authors: Li Xin Li
Published: June 2014

Social tagging systems allow Internet users to annotate resources with tags. Internet is an open system, which permits users the freedom to explore tags. However, the freedom afforded users comes at a cost: an uncontrolled vocabulary can result in tag ambiguity hindering navigation. So, a key question is how to harvest tag semantics from these systems. We present an algorithm of hierarchical tag clustering. With this algorithm, we clustering the tags into a semantic tree, then we turn every resource item into an induced tree. We propose a new method for resource retrieval, which based on semantic similarity. We present extensive experimental results on a real world dataset. When we retrieve the resource based on semantic similarity, our algorithm shows the high recall and precision. Furthermore, our algorithm demonstrates more utility for recommendation.
Study on Decoration System Based on Computer Aided Design
Authors: Liu Jun
Published: June 2014

This paper focuses on the use of computer-aided design system design decorative material library, study the specific programs to improve system efficiency and simplify the user's operation, focusing on the part of the interface design. Finally, we summed up the prospects and applications decorative art computer-aided design systems, and analysis of the current shortcomings and future research directions of the program.
Research on the Key Technology of Personalized Learning for Peasant Based on Wireless Network
Authors: Zhao Ji Chun , Liu Shi Hong , Guo Jian Xin , Qiao Zhu Feng
Published: June 2014

With the rapid development of wireless communication networks and mobile terminal technology, it has an important significance for improving the cultural quality of farmers and the rural information level that researching the key technology of personalized learning for farmers based on wireless network. The research progress of personalized service was introduced based on reading a large number of domestic and foreign related research literature. The personalized recommendation technology, the recommendation algorithm and measure method was given in the research of personalized technology. The personalized recommendation system was designed and tested, the result could need the users need. Finally the problems and future research directions in the personalized system is summarized.
An EEG Application Platform’s Design and Development
Authors: Wang Yan Zhao , Tang Ruo Yun , Yao Shi Hao , Liang Gui Hao , Zhang Jian
Published: June 2014

An realization of EEG application platform is displayed in this article. EEG signals are gathered and processed by Head-mounted device to obtain control use parameters, which is to be transmitted to the PC platform or the single-chip control system through Bluetooth. The software on the PC platform could make use of the control use parameters, while the single control system could output instructions to control the connected hardware, according to the computation results of the parameters.
System of Intelligent Library Retrieval Based on Data Mining
Authors: Xu Guan Chun
Published: June 2014

Digital Library Retrieval involves the mathematical model of information retrieval algorithms, it is very important to design an algorithm to make the best books to extract the required information to involve the association rules and classification method for predicting the reader from the database and potentially fast and accurate information use problems. In this paper, the intelligent retrieval of books were analyzed using data mining algorithms can be studied books intelligent retrieval application, until practical algorithm to solve the retrieval model first developed fit the requirements and design a library information library books to achieve intelligent retrieval system.
EASYBUS-Bus Monitoring and Searching System
Authors: Ma Shuai , Gao Xin , Dong Bing Rui , Wang Qing Qing , Sun Hai Yang
Published: June 2014

With the development of the Internet, people come to use it frequently to search bus lines, such as Google maps, Baidu maps, etc. But these online maps have the information only about bus lines, stops, but the information how long bus will arrive. The paper designs a bus monitoring and searching system to forecast bus waiting time. The system sets up Radio Frequency Identification Technology (RFID) equipment at every bus stop to identify the dynamic information and exchange data with buses on the road; Rely on Global Positioning System (GPS) technology, we obtain the real-time location of the target vehicle information, and through the geographic information system (GIS), the system show the condition of the vehicle and the road network in the electronic map which helps bus companies to monitor easily. Using the Android software, designed for users, users can check waiting time any time any where. The waiting time error in the system is less than two minutes.
Study of Bluetooth Printing Technology Based on Android Phone
Authors: You Xiang Dong , Zhang Zhi Yuan , Zou Xiao Jia , Pan Hao
Published: June 2014

This paper introduces the basic principle and its applications of the mobile phone Bluetooth Printing technology. By analyzing the ESC/POS commands, the technical implementation principles of text print, photo print and one-dimensional / two-dimensional code print were presented. A software application applicable to Android platform was designed and developed, which accomplished the goal of text print, photo print and one-dimensional / two-dimensional code print via Bluetooth. This printing technology can be used for receipts and label printing, which contains good portability, extensibility and application value.
Energy Consumption Optimization Model for Cloud Workflow Application Scheduling
Authors: Luo Yong Hong , Liu Wei Ming
Published: June 2014

Improper scheduling model which is selected to execute cloud workflow application usually results in the waste of energy consumption. In order to lower the higher energy consumption of cloud workflow application execution, we propose a novel energy consumption optimization model for cloud workflow scheduling based on service level agreement, which can reduce energy consumption while meeting the performance-based constraints of time and cost. The optimization model can find out the optimal scheduling solution through calculating total energy consumption for each feasible scheduling solution.
Research on the Situation and Prospect of ICT Application in China Modern Logistics
Authors: Deng Hong Shu Yu , Fang Cao
Published: June 2014

ICT application has greatly improved the efficiency of logistics and reduced unnecessary costs. But it hasn’t been fully used in Chinese logistics. This paper focuses on how to be more effective in using ICT to construct modern logistic to improve logistics informatization. This paper reviews the lack of ICT application in domestic logistics through reviewing literature, such as oversimplified application of ICT in logistics, the undeveloped application of Internet of Things in logistics, slow development of the Logistics Public Information Platform and general phenomenon of information isolated island. This paper also further analyzes the trends on the domestic ICT application in logistics through literature and recent statistics. Based on the analysis, this paper gives practical advices on fully applying ICT to logistics, including achieving the overall integration of IT and CT, accelerating the construction of public platform with intelligent cloud logistics, strengthening industries cooperation and establishing a government-led mechanisms.
Application of Fuzzy Comprehensive Evaluation in Mechanical Design
Authors: Chen Hong Wei , Wang Rong Jie
Published: June 2014

Fuzzy comprehensive evaluation is a comprehensive evaluation applying fuzzy transformation theory. It considers the influence of various factors on the design results, does comprehensive quantitative analysis, and uses quantitative index as selection criteria. It took gear tooth number selection in mechanical design as an example, illustrated the application of the fuzzy comprehensive evaluation on parameter selection in mechanical design.
Conduction Properties of SiN Films Depositing by RF Magnetron Sputtering
Authors: Zhang Zai Yu , Yang Jian Jun , Wu Yan Hui
Published: June 2014

In the work, the resistivity of the SiN film was discussed, the resistivity of the SiN film was influenced by the deposition parameters, such as the sputtering power, deposition temperature, N2 pressure and ratio of N2/(N2+Ar). Only considering the resistivity of the SiN film, the optimal parameters of the film were as below, the sputtering power was 50W, the substrate temperature was 400°C, N2 pressure was 1Pa, and the ratio of N2/(N2+Ar) was 2.5%.
Experiment and Application Study on the Load-Bearing Properties of Shallow Arch Circular Concrete Filled Steel Tube Support
Authors: Wang Jun , Gao Yan Fa
Published: June 2014

Shallow arch circular concrete filled steel tube support has a good load-bearing capacity, which is used in soft rock roadway supporting to solve the problem of supporting instability and to reduce the amount of anti-invert excavation. In this paper, concrete filled steel tube supports of Φ168 ×6 are designed according to shallow arch circular concrete filled steel tube structures and their load-displacement curves, ultimate bearing capacity and support failure mode are especially tested in experiment. This shallow arch circular concrete filled steel tube support is also applied in very soft rock roadway supporting of No. 1 mine well of Chaganzhuoer in Xilinhot, Inner Mongolia and proved to be of good supporting effect. The shallow arch circular concrete filled steel tube support is of higher load-bearing capacity and of outstanding advantages in solving extremely soft rock roadway supporting problems, as is proved in both theoretical test and application.
The Incipient Cavitation Number of Square-Edged Orifice Plate
Authors: Wang Wei Jun
Published: June 2014

In the present paper, the incipient cavitations number was analyzed by theoretical considerations. By using simulation methods, it could be regarded that the incipient cavitations number was mainly dominated by the contraction ratio of the orifice plate. The less the contraction ratio of the orifice plate is, the larger is the incipient cavitations number. The effects of orifice plate’ thickness on the incipient cavitations number was not obviously and could be neglected. When Reynolds number is more than 105, Reynolds number has little impact on the incipient cavitations number.
Analysis and Improvement of Fan Blades Noise
Authors: Wang Rong Jie , Chen Hong Wei
Published: June 2014

Fan blades noise is mechanical noise and aerodynamic noise, and the aerodynamic noise is the main noise. Fan's speed, blade number, angle, radius of curvature is the main factor affecting the fan blades noise. Key of control fan noise, should be placed in fan design, Reduce the circumferential velocity, leaned blade, increase the radius of curvature is favorable measures of reducing the noise of the fan blade. Control of noise from the source, will achieve better results.
China Domestic Test and Verification Research of Snow Grip Performance of C1 Tire Based on ECE R117
Authors: Liang Rong Liang , Feng Yi , Gao Ming Qiu , Xu Zhi Guang , Xu Jun Hui
Published: June 2014

The test method for C1 tire snow grip performance based on European ECE R117 is analyzed; the test and evaluation process and test ability for C1 tire snow grip performance has already been established. The feasibility research of the implementation of C1 tire snow grip performance has been done, which provides the necessary technical reserve for products performance development of domestic tire enterprises, drawing test and evaluation standards, tire performance matching and EU certification.
Development of Auto Starter Durability Test System Based on PLC
Authors: Li Jun , Li Yi Ran , Chen Hui
Published: June 2014

Starter is an important component of auto engine, its service life can be reflected by the durability test. According to the running conditions, requirements of the starter durability test were analyzed. So, an electrical control test system based CP1H PLC was established. The system includes PC monitor module achieved by configuration software, control module build by Omron CP1H PLC and actuator module with four engine test rigs. Then, the PLC hardware circuit was designed and the flow of control program was given. The test system has characteristics of versatility, automated control and high testing precision.
Numerical Simulation of Particle Trajectory in Electrostatic Precipitator
Authors: Chen Deng Feng , Yang Xiao Dong , Xiao Hai Yan
Published: June 2014

The performance of Electrostatic Precipitator (ESP) is significantly affected by complex flow distribution. Recent years, many numerical models have been developed to model the particle motion in the electrostatic precipitators. The computational fluid dynamics (CFD) code FLUENT is used in description of the turbulent gas flow and the particle motion under electrostatic forces. The gas flow are carried out by solving the Reynolds-averaged Navier-Stokes equations and turbulence is modeled by the k-ε turbulence model. The effect of electric field is described by a series equations, such as the electric field and charge transport equations, the charged particle equation, the charge conservation equation, the mass and momentum equations of gas, the mass and momentum equations of particle and so on. The particle phase is simulated by using Discrete Phase Model (DPM). The simulations showed that the particle trajectory inside the ESP is influenced by both the aerodynamic and electrostatic forces. The simulated results have been validated by the established data.
Propagation of 2D Electromagnetic Wave in Lossy Lorentz Media Based on Auxiliary Differential Equation of Finite-Difference Time-Domain Method
Authors: Chen Bing Kang , Guo Feng
Published: June 2014

In order to study the reflection of electromagnetic wave in Lorentz media, A finite-difference time-domain method based on the auxiliary differential equation (ADE) technique is used to obtain the formulation of 2-D TM wave propagation in lossy Lorentz media. In 1-D case, the reflected coefficients calculated by ADE-FDTD method and exact theoretical result are excellent agreement. This expresses that the 2-D formulas of electromagnetic wave propagation in lossy Lorentz media are right. Furthermore, Plane wave reflected by Lorentz media layer is calculated and simulated. Results display that reflected effect is evident.
The Study of 2+1 Dimensional KdV Equation in Non-Uniform Dusty Plasmas
Authors: Zhang Xi Jun , Xue Jian Bin , Ma Dong Lin , Zhang Li Ping
Published: June 2014

The combined effects of the inhomogeneity and higher-order transverse perturbation on the nonlinear solitary waves are investigated. People are very interested in the nonlinear reverse structure (such as solitary wave, shock) in dusty plasma. Dusty plasma is a kind of ionized gas which contains electronics, plasma and dust particles. As the characters of big quality and high negative of dust particles, whose existence will significantly affect the behavior of plasma and stimulate the rich wave model. Today the study to nonlinear wave in inhomogeneity dusty plasma is focused on one-dimensional and it is very small to three-dimension. A modified variable coefficients Kadomtsev-de Vries (KdV) equation is obtained by using the reductive perturbation method.The conclusion can be got from the simulation that inhomogeneity has strong influence on the nonlinear properties of dust acoustic solitary waves.
Measurement and Numerical Study of Characteristics of an Energy Unit
Authors: Sun Zhen Bao
Published: June 2014

The mathematical model based on temperature formulation for describing freezing course of soil is presented and the explicit finite difference method is used to perform computer simulation of freezing time of soil in this paper. It seems to be satisfactory by comparing the numerical results by the method of TDMA with experimental data. It is significant for freezing process and freezing units, optimum design of practical engineering.
Analysis and Comparison of Power Supply Schemes for well Clusters in Gas Gathering and Transmission Engineering
Authors: Zhang Li , Yang Kun
Published: June 2014

Based on load specification, the power supply model and requirement of well clusters is presented and established in gas gathering and transmission engineering, which is applied on type I and type II. The study considers both reliability and economy of all power supply proposals, and comparatively calculates and analyzes the numbers and types of main electrical equipments, capital expenses (CAPEX) and operating expenses (OPEX). Specially, for the problem of voltage drop, it illustrates the contrast and selection of power transformers with two ratings by the technical features of standard. Finally, the paper respectively puts forward the power supply schemes for well clusters type II and type II from different proposals based on the detailed results, which shows that the conclusions are feasible and reasonable in the practical engineering application.
Research of Visualized 3d Substation Simulation Based on Virtual Reality Technology
Authors: Sun Feng Jie , Chen He , Liu Hui Juan
Published: June 2014

The three-dimensional virtual reality technology was introduced into the visualized substation. The virtual substation models of main electrical equipment and the whole scene were built by using 3dsMax modeling software. After the design of special events response routing and editting the corresponding script language, users can interact with virtual objects in the scene model, resulting in feelings and experiences on the ground. Compared with the real substation, the virtual substation has the advantages of low cost, interactive operation safety, and is of great significance to improve the technical level of the operators.
Agent-Based Modelling Simulation Case Study: Assessment of Airport Check-In and Evacuation Process by Considering Group Travel Behaviour of Air Passengers
Authors: Cheng Lin , Reddy Vikas , Fookes Clinton , Yarlagadda Prasad K.D.V.
Published: June 2014

Passenger experience has become a major factor that influences the success of an airport. In this context, passenger flow simulation has been used in designing and managing airports. However, most passenger flow simulations failed to consider the group dynamics when developing passenger flow models. In this paper, an agent-based model is presented to simulate passenger behaviour at the airport check-in and evacuation process. The simulation results show that the passenger behaviour can have significant influences on the performance and utilisation of services in airport terminals. The model was created using AnyLogic software and its parameters were initialised using recent research data published in the literature.
The Research of Hohhot in the Integration of Urban and Rural Public Transport Management System
Authors: Li Cheng Bing , Zhang Yi , Guo Rui Xue , Li Xi Lu
Published: June 2014

At present, the integration of urban and rural public transportation Hohhot is at an early stage. The thesis mainly studies the management of the integration of urban and rural public transportation system, analyzes the existing problems of integration of urban and rural public transport management system, puts forward the major traffic management mode, in the presence of Hohhot itself, puts forward the strategy for the development of the integration of urban and rural public transportation management system and through these proposals and suggestions aims to promote the development of Hohhot urban and rural public transportation integration.
Agent-Based Application on Different Boarding Strategies
Authors: Iyigunlu Serter , Yarlagadda Prasad , Fookes Clinton
Published: June 2014

In this paper we implemented six different boarding strategies (Wilma, Steffen, Reverse Pyramid, Random, Blocks and By letter) in order to minimize boarding time and turnaround time for Boeing 777 and Airbus 380 aircrafts by using Agent-based modelling approach. In the simulation, we divided passengers into six different categories which are group size more than 5 people, passengers with child, gold members, first class passengers, business class passengers and economy class passengers. Results from the simulation demonstrates Reverse Pyramid method is the best boarding method for Boeing 777 and Steffen method is the best boarding method for Airbus 380.
A Steroidal Saponin RCE-4 Inhibits Lipopolysaccharide-Stimulated Inflammatory Responses via Blocking PI3K/Akt-Mediated Nf-κB Activation in RAW264.7 Cells
Authors: Bai Cai Hong , He Hai Bo , Cheng Fan , Zou Kun , Wang Jun Zhi , Liu Guang Yao , Deng Wei , Chen Zhi Feng , Chen Xiao , Chen Jian Feng
Published: June 2014

Steroidal saponin: (1β,3β,5β,25S)-spirostan-1,3-diol1-[α-L-rhamnopyranosyl-(1→2)-β-D-xylopyranoside] (RCE-4) is the most abundant and bioactive members in Reineckia carnea, has been reported to possess antiinflammatory activity, but the underlying mechanisms remain largely unknown. The present aim was to study expression of inflammatory cytokines, on the basis of this investigation, the possible mechanism of RCE-4 was elucidated. In the present study, we found that the concentrations of TNF-α, IL-1β and IL-6 released from LPS-stimulated RAW264.7cells significantly increased compared to control (P<0.01, respectively). After pretreatment with RCE-4, the TNF-α, IL-1β and IL-6 levels significantly decreased compared with the LPS group (P<0.05, P<0.01, respectively). Further studies indicated that RCE-4 significantly suppressed Akt phosphorylation and NF-қB activation, and with the dose of RCE-4 increasing; their improvement became more and more strong. Our results showed that RCE-4 inhibited LPS-stimiulated TNF-α, IL-1β, IL-6 productions through the blockage of PI3K/Akt-mediated NF-κB activation. Our findings might provide a molecular basis for the ability of RCE-4 serving as a promising candidate for treating various inflammatory diseases.
Effect of Drying Temperature on Quality of Purple Sweet Potato Powder
Authors: Wang Dan , Ma Yue , Guo Xiao Fei , Zheng Qing Yun , Zhao Xiao Yan
Published: June 2014

In order to reveal the effect of drying temperature on quality of purple sweet potato powder, four drying temperatures (70, 80, 90 and 100 oC) were selected. The effect of color, anthocyanin content, and scavenging ABTS free radical ability were studied. The results showed that drying process decreased anthocyanin content, and with increasing drying temperature, the a* value and anthocyanin content decreased. However, the treatments dried at 80, 90 oC exhibited the similar scavenging ABTS free radical ability with control, while the treatments dried at 70, 100 oC had lower scavenging ability than control.
Design and Implementation of a High-Speed LVDS Data Acquisition System Based on Virtex-5 FPGA
Authors: Wu Qiang , Wang Gen , Li Xu Wen
Published: June 2014

A High-Speed LVDS Data Acquisition system is designed, with XILINX’s Virtex-5 FPGA as core processor as well as TI’s TMS320C6748 DSP for pre-processing and storing data. This system achieved a greater amount of image processing and faster image processing requirement. The system completed the dual LVDS image data acquisition according to the demand. The resolution of the image data is 320x257. Each image transmission frame rate of not less than 150 / sec. large amount of data throughout the system as well as real-time demanding is a big challenge for designer. The designer uses simulation tools from Mentor Graphics Hyperlynx to complete the stack and impedance calculation and signal quality simulation to ensure that the system is stable and reliable. This system also has better scalability and more reliable storage method than past designs. Recently, the system has completed testing verification and results show that this design is feasible and reliable.
The Main Components Analysis of Laetiporus sulphureu Crude Extract and its Hepatoprotective Effect on Carbon Tetrachloride-Induced Hepatic Fibrosis in Rats
Authors: Sun Wen Jun , He Hai Bo , Wang Jun Zhi , Wu Ling , Cheng Fan , Deng Zhang Shuang
Published: June 2014

To analysis the main component of Laetiporus sulphureus primary separation product (LSPSP) and observe the hepatoprotective effect of LSPSP. Silica column and HPLC was adopted to isolate main constituents from LSPSP. The main components were analyzed and identified by HPLC and HNMR. And then its hepatoprotective effect was evaluated, we used Sprague-Dawley rats as experimental rats, and made hepatic fibrosis models induced by carbon tetrachloride (CCl4).The hepatoprotective effects of SPSP on hepatic fibrosis of rats were evaluated by content of AST and ALT, levels of liver cell injury and degree of liver fibrosis. In the study, we found that LSPSP mainly contains eburicoic acid and trametenolic acid B. After treatment with LSPSP, the levels of serum AST and ALT significantly decreased, alleviated liver cell damage, reduced the collagen deposition in the liver tissue, and then inhibited liver fibrosis. Our studies indicated that LSPSP main components areeburicoic acid and trametenolic acid B, it exerted beneficially hepatoprotective effects on the CCl4 induced hepatic fibrosis.
Reform and Exploration of Electronic Basic Courses Teaching
Authors: Yang Hui Mei , Wu Fei Qing , Wu Cheng Yu , Zhao Qi
Published: June 2014

For the needs of engineering talent for the social and its own teaching conditions of Ningbo Institute of Technology, Zhejiang University, the electronic basic courses have made effective reform and exploration in practice of teaching philosophy, teaching content, teaching methods and so on. A new curriculum system of multi-platform and multi-level instruction and a new teaching model based on the theory of scaffolding Instruction were constructed. EDA simulation software was also introduced in the theoretical teaching. These efforts greatly improve teaching quality and enhance students' comprehensive quality.
Teaching Reform on the Soil Mechanics and Foundation
Authors: Li Wei Wei , Wu Shuai Tao , Zhao Bo , Hu Wu Qiang , Zhang Yan
Published: June 2014

The soil mechanics and foundation is a course with strong theoretical and practical features. Based on the possible problems in the teaching process, the author provided some considerations and suggestions such as transforming teaching concept, strengthening the systematicness of the teaching content, electing textbook and improving teaching method, increasing the interest of student, valuing the practical teaching link. A series of inside and outside tests at school were introduced to help the student master knowledge in all aspects.
Research on Level Effect-Based Electrical Load Forecast Method
Authors: Li Fa Chao , Liu Shuo
Published: June 2014

With the rapid development of economy, the power demand becomes more and more. Together with limited coal resources and the environmental pollution problems caused by coal-fired, there is an urgent need for evaluation on the utilization of coal resources and the environmental pollution degree. Under this background, we gave a satisfactory degree standard that a basis for the division of power load data. In order to reflect the recognize effect of the data with different satisfactory degree, we gave a level effect function. Then we establish a level effect-based electrical load forecast model for the synthesize of different results under different satisfactory degree, and gave a concrete forecast result combined with a specific case. Theoretical analysis and case study show that the established model not only has good structural characteristics, but also has a strong realistic meaning. It is beneficial to make a reasonable electrical load plan and control its usage.
Detection of Earth’s Free Oscillations Stimulated by the Mw8.3 Okhotsk Sea Earthquake in 2013 Based on Observational Data of Water-Tube Tiltmeters in Shaanxi Province
Authors: Shao Xiao Yi , Wang Ying Chang , Xing Xi Chun
Published: June 2014

Using power spectrum density estimation method, analyzed the digital observational data of water-tube tiltmeters of Shaanxi deformation monitoring network in 6 seismic stations as QL, HZ, HY, BJ, XA and NQ, which detected the earth’s free oscillations stimulated by the Mw8.3 Okhotsk Sea Earthquake in May 24th, 2013. The results show that radical shock of spherical oscillation (0S05~0S32), harmonic spherical oscillation (3S01, 1S04, 2S04, 1S06) and toroidal oscillations (0T05~0T09) are detected effectively. Comparing the period of the extracted oscillation with that the theoretical oscillation of the Preliminary Reference Earth Model (PREM), finding that they are accordant with each other and the relative error is less than 0.2%. And the result is consistent with the CDSN Urumqi observatory recorded in M8.1 Kunlun Mountains Earthquake in 2001.
Investigation on Spectral Aliasing Error Resulted from Truncating Signals Incoherently
Authors: Zhang Hui , Han Feng , Bao Xiao Yan , Mao Hua Yao
Published: June 2014

The aliasing error resulted from truncating signals incoherently is one of main spectrum errors. The investigation on the error remains quite limited. This restricted the development of high accuracy spectrum analysis. This work discussed the truncation effect and the corresponding aliasing error in quantity, and revealed its dependence upon the truncation conditions. Then a concise technique was proposed to suppress the truncation aliasing error of DFT spectrum by modifying the first datum of the digital signal in time domain. Under general truncation conditions, the simulations show that the error correction of the 5 spectral lines near the main lobe is effective and the maximum absolute error of the main spectral line is decreased from ±2.4‰ to ±0.5‰.
Method for Active Radar Seeker to Suppress Convolution Modulation Smart Jamming
Authors: Jin Shan Shan , Wang Chun Yang , Li Xin , Zhang Xiao Fei , Sun Yu Xue
Published: June 2014

Smart jamming based on convolution modulation brings a great threat to active radar seeker. In order to counter the jamming, a method of orthogonal projection is designed. Firstly, both the mathematic models of linear frequency modulation (LFM) signal and convolution modulation smart jamming are made. Secondly, the anti-interference principle of orthogonal projection is analyzed, on the basis of which a reasonable filter is designed. Thirdly, simulations of signals respectively convolved with noise, triangle pulse sequence and rectangular pulse sequence are made, which verifies its good interference effects. The conclusion is that the method can effectively suppress the convolution modulation smart jamming.
Rapid Power Quality Detection Based on Generalized HS-Transform
Authors: Liu Guan Qi , Wu Li Na
Published: June 2014

In this paper, the hyperbolic S-transform (HS-transform) has been generalized with the introduction of the whole time frequency regulation factor and making the HS window function proportional to the square root of the frequency. Meanwhile, combined with the idea of incomplete S-transform, a rapid power quality detection based on generalized HS-transform (GHST) is proposed. Firstly, the fast Fourier transform (FFT) was performed and dynamic measurement was utilized to describe the envelope of power spectrum so as to detect the valid frequency samples of FFT. Then the GHST was specifically performed for these samples and a complex matrix was generated. Finally, these feature vectors extracted from the complex matrix were used to detect the power quality disturbances. Simulation results demonstrate that the proposed method can accurately detect the power quality disturbances with high computation speed and low sensitivity to noise, and it is suitable for practical applications.