bluuebunny/crossref_metadata_2025 huggingface dataset:
A Temperature and Humidity Control System of Storehouse Environment Based on Virtual Instrument
Authors: Liu Jin Hua , Shao Xin Jie
Published: August 2013

A temperature and humidity control system of storehouse environment is proposed in this paper, and the hardware structure and Software function are designed based on virtual instrument technology. The design of hardware system includes two parts, one is to monitor temperature and humidity, the other is to control them through turning on/off the executive device. The systematic software was divided into two major function modules: monitor and control module and data management module. In order to reduce the influence of interference and ensure the system stability, the anti-interference program is designed in the system software. Testing result shows the control system is feasible and effective for improving the precision of storehouse environment control.
Comparative Study on External Flow Simulation of Passenger Car with Complex Underbody and Flat Underbody
Authors: Yan Xu , Qiao Xin , Zhao Zhi Ming , Ye Jian , Liao Lei , Hu Xing Jun , Wang Jing Yu
Published: August 2013

In this paper, the external flow simulation has been carried out on a simplified passenger car model with two schemes adopted: a smoothed complex underbody and a flat underbody. The aerodynamic characteristics and the flow field structure of the passenger car model were obtained with CFD method, and the drag coefficients of the smoothed complex underbody and the flat underbody are respectively 0.275 and 0.251. According to the simulation, flow separation and energy loss of fluid was caused by protuberances on the complex underbody. As there are many differences between the aerodynamic characteristics of the smoothed underbody and the flat one, its suggested to use a smoothed complex underbody not a flat underbody in the studying of aerodynamic drag reduction of a passenger car.
Real-Time Bus Video Monitoring System Based on 3G Network
Authors: Feng Min , Sun Jie , Zhang Yin Yang
Published: August 2013

According to some bottleneck problems of the communication network bandwidth in wireless video transmission, a design scheme of real-time traffic video monitoring system based on 3G network is put forward in this paper. The design of hardware and the software realization of the system process are mainly introduced. TMS320DM8168 is selected to build the hardware platform in this system. H.264 video encoder is integrated internally. The real-time transmission of video data is sent to the remote monitoring center through the 3G network to improve the video transmission quality. The system meets the requirements of video transmission applied in automobiles.
RFID/GPS/GPRS-Based Logistics Monitoring and Management System
Authors: Zhang Ying
Published: August 2013

in order to improve the service level logistics, a design of logistics system based on GPS/GPRS/RFID is supported, which is designed and implemented by using ARM embedded platform. This system mainly includes the RFID module, GPS module, GPRS module, MCU module, etc. By receiving GPS data and RFID data as well as using ARM platform to analyze and process, the system sends the information of analysis through GPRS module to the logistics center so as to monitor and manage the goods. The system is characterized by real-time, high reliability, low power-consumption, small volume, etc, which meet the needs of modern logistics transport monitoring and managements.
The Networked Test System of the Bent and Tensile Strain Based on Virtual Instrument
Authors: Lu Na
Published: August 2013

In order to solve the traditional testing be restricted by environmental, Virtual Instrument and Network Techniques is used in this paper. By introducing beam deflection curve, the acting forces of the specimens are built based on the curve equations. Software of the testing system is designed using LabVIEW a software design tool for Virtual Instrument. This scheme makes up of testing remote control and testing data management. Based this scheme, the specimens force was estimated to explain the experimental results. The curve lines and a number of important parameters are obtained.
Application of the CEMS on Fault Diagnosis for Rotary Machine
Authors: Huang Qiang , Li Jun , Le Hai Wen
Published: August 2013

In order to monitor states of the rotary machine in time and ensure its performance, it is very important to analyze the evolution from the normal state to the fault state. In the paper, a new method is proposed to improve the precision of fault diagnosis. Firstly, the character extraction with mutative scales (CEMS) is applied to achieve the characteristic values. Secondly, the Hidden Semi-Markov model is built to identify the different running states. Thirdly, the new method is compared with the traditional one by the example of bushing abrasion of the connecting rod in diesel engine. According to the simulation and experiment researches, it indicates that the signal characters with more state information can be obtained pertinently by using the CEMS. And the accuracy of recognition is 97.33% in the 150 test samples, improved evidently than the traditional one. And the new character extraction method can be used in the technology domain widely.
The Research of Parallel Plate Capacitor Measurement Circuit
Authors: Xiao Zhi Hong
Published: August 2013

Capacitive sensor plays an important role in electrical measuring technology. A new method of a set of parallel plate capacitor measurement circuit was proposed. The system adopted the self-excited balanced measuring method to gauge the change amount of capacitive sensor. The results show that the system has a high level of measurement accuracy and an anti-jamming capability.
Comprehensive Evaluation Model Based on Synthetic Importance Measure
Authors: Ji Xiang Jun , Zhang Zan , Li Fa Chao
Published: August 2013

To solve the problem of attributes interdependence and correlation in comprehensive evaluation, the paper proposes to identify the relationships among the attributes from the decision information system based on the covering rough sets. It first shows a metric with the characteristics of fuzzy measure to measure the hidden importance of attributes, which can be seen as a reflection of the attributes correlation. Then the synthetic importance measure is given by incorporating it into the basic importance. Furthermore, the comprehensive valuation model is constructed by taking Choquet integral as an aggregation operator.
Analysis on Altitude Correction Factor of 750kV Transmission Line Conductors Corona Inception Voltage
Authors: Geng Qing Zhong , Lü Fang Cheng , Lei Zhu , Jun Zhu , Liu Yun Peng
Published: August 2013

In order to study the effect of attitude for corona inception voltage of AC transmission lines conductors in the altitude areas ranging from 0 to 3000 meters, conducted a series of tests about the corona characteristics of AC six-bundle conductors based on the mobile corona cage at Wuhan, Xining and Haibei respectively. Recorded the number of photons after conductors corona discharge by ultraviolet imaging detector. Conductor corona inception voltages were acquired by the tangent method. The measurement result shows that conductors corona inception voltage decrease with increasing altitude. Corona inception voltage is reduced about 8.12% if altitude rises 1000m. The exponential and linear correction equations suitable for 6 × LGJ-400/50 conductors are introduced. The maximum tolerance is less than 5% and meets the engineering needs.
Study of Capacitor Bank Fault Location
Authors: Zhao Tao , Liao Yi Fan , Su Zhi Ming , Li Rui Hai , Liu Yun Peng
Published: August 2013

At present, the operational parallel compensating capacitors can only through the protection action for the information, so we can‘t location the fault capacitor. In order to obtain every parallel capacitor running status information and according to internal structure and the operation mode of film capacitor, this paper proposed a method of locating a capacitor, which can eliminate the affection caused by the environment and measurement error of sensor accuracy effectively. So we can locate the fault capacitor in complex environments running on the site.
Hysteresis Current Control Technique Based on Space Vector Modulation for Active Power Filter
Authors: Wang Yun Liang , Guo Qi Liang
Published: August 2013

In this paper, the hysteresis current control (HCC) technique based on space vector modulation (SVM) for active power filter (APF) is proposed. The switching control algorithms of the HCC based SVM manage to generate compensated current according to the reference current. Harmonics extraction is calculated for the power compensation based on the instantaneous active and reactive power theorem in time domain. A closed loop control system is carried out and the APF manages to generate better compensated harmonics currents to the power grid.
Application of Matlab to write a Script for HFSS’s Eigenmode Solution of Circular Cavity
Authors: Ji Ai Guo , Liu De Shui
Published: August 2013

With the rapid development of modern electromagnetics, a lot of electromagnetic field numerical methods are maturing. 3D electromagnetic simulation software HFSS has two solutions including incentive solving and eigenmode solving. When solving the calculation of the structure of eigenmodes or resonant type can use eigenmode solver. Using matlab generate HFSS scripting language-based program to set eigenmode solution is a very convenient and very innovative approach. The program on a circular cavity modeling and eigenmode solution set simulation results meet the design requirements.
Vehicle-Carrying Multi Channel Data Acquisition System Based on the CompactRIO
Authors: Zhang Yun Lei , Wu Xing , Nan Pan , Wang Xu
Published: August 2013

In order to obtain the key parameters which required by the Vehicle-Carrying test, the multi-channel data acquisition system based on CompactRIO embedded platform was developed. This system was satisfied the requirement of high reliability, inexpensive, portable and rapid configuration, Then, synchronized control technology such as queue, FIFO, interrupt and the superior system architecture which is compare to the state machine has been introduced in detail. Finally, availability and stability of the system were proved through the pressure text of data acquisition.
An Improved Estimation of Distribution Algorithm Based on the Entropy Increment Theorem
Authors: Yi Yang , Chen Mei Jia , Yu Fa Hong
Published: August 2013

To systematically harmonize the conflict between selective pressure and population diversity in estimation of distribution algorithms, an improved estimation of distribution algorithms based on the entropy increment theorem (IEDAEI) is proposed in this paper. IEDAEI conforms to the entropy increment theorem in simulating the competitive mechanism between energy and entropy in annealing process, in which population diversity is measured by the entropy increment theorem. By solving some typical high-dimension problems with multiple local optimizations, satisfactory results are achieved. The results show that this algorithm has preferable capability to avoid the premature convergence effectively and reduce the cost in search to some extent.
Long-Term Sales Forecast Method Based on Grey Model and Artificial Neural Network
Authors: Wang Yi Jun , Tang Hong Ying
Published: August 2013

Long-term sales forecasting is a problem that has been focused on for a long time. In order to forecast the long-term sales of an industry or an enterprise accurately, a new method based on Grey Model and Artificial Neural Network is proposed in this paper. The effectiveness and feasibility of the proposed method is verified by simulation experiment using sales data of the manufacturing and trade industry provided by the U.S. government.
The Principle of Dynamic Diagnosis Based on Integrated Maintenance Information and its Application
Authors: Wu Song Lin , Li Shi Chao , Zhao Jun
Published: August 2013

Based on the concept of an integrated maintenance information system and related information environment, this paper discusses the process of troubleshooting in modern maintenance in detail, and gives a model of dynamic faults diagnosis, in which a reasoning program is designed through taking advantage of information fusion and time analysis. In the end, the authors present the logic process of dynamic diagnosis through a typical example, and propose a dynamic diagnostic system based on information fusion.
Construction and Implementation of Coal Mine Operating Management Digital System
Authors: Guo Xiao Jun , Zhang Wen Jing , Meng Qing Guo
Published: August 2013

At present, because of the extensive production management and backward information management, the coal mine enterprises require a shift to intensive management. The establishment operation management of digital system of coal enterprises can help the enterprise to realize the digital management, improve the market competition ability, promote the enterprise strategic management ability. The realization of this system can help to solve the main problems such as the difficulties of business process management and summary, unable to effectively control the business process, lack of process and cooperation difficult, difficult of business analysis. Therefore the establishment of operation management of digital system of coal enterprises becomes a pressing matter of the moment.
Application of Participatory Sensing in Meteorological Information Service System
Authors: Sun Xiao Yan , Du Jing Lin , Zhou Jie
Published: August 2013

In order to make weather forecast data more precise and help users to make right decisions, a new method that applying participatory sensing in meteorological information service system is put forward in this paper. The participatory sensing architecture consists of four layers: sensing layer, data transmission layer, data processing layer and application layer. The key technologies involved in each layer are analyzed. Its explained how to fuse sensing data collected from sensors carried by users mobile phone with traditional meteorological data. The weather information service prototype system based on participatory sensing is realized. Through the example, its proved that this system is feasible and effective to improve the precision of weather forecast.
Numerical Simulation of the Plasma-Assisted Combustion of Methane HCCI
Authors: Wang Hui Chun , Wang Chun Mei , Zhu Su Wei , Liu Xiao
Published: August 2013

To enhance the lean combustion of methane homogenous charge compression ignition (HCCI) engine and expand the lean-burn limit, a non-equilibrium plasma kinetic model has been used to study the discharge process of methane-air mixture numerically. The effect of the discharge productions on the methane HCCI combustion are studied numerically by using a CHEMKIN-based multi-zone model. The simulation results show that the discharge produced reactive radicals, such as H, O and CH3. These radicals can enhance the combustion of CH4 fueled HCCI significantly. Introduction of 1% (volume fraction of the fuel) of H reduces the ignition delay time of HCCI combustion (with equivalence fuel / air ratio of Φ = 0.5) by about 13 crank angle degrees (°CA), adding the same amount of O reduces the ignition delay time by about 10°CA. Further research shows that, with the increase in the above radicals, the combustion enhancement becomes stronger.
Modeling and Modal Analysis of Less-Teeth Gear Shaft
Authors: Zhang Dong Sheng , Zhang Jian Jun
Published: August 2013

As the less-teeth gear has the less-teeth, the bigger helix angle and the more contact ratio etc. The research of dynamic meshing characteristics makes focus, and modal analysis is the basis of dynamic analysis. In order to get the modal analysis characteristics: firstly the parametric solid modeling is realized through the software of MATLAB and PRO/E; secondly multistage inherent frequencies and mode shapes are achieved by the finite element software of ANSYS Workbench.
To Improve the Performance and Efficiency of Refrigeration Systems by Using Refrigerant Pumps
Authors: Liu Qing Jiang , Yuan Zeng Zhi , Sun Jin Ting , Han Fang
Published: August 2013

In order to improve refrigeration system stability and efficiency of the low pressure difference between thermostatic expansion valve, it is researched that the refrigeration system is the refrigerate capacity of the HSN7471-75 compressors. The system performance is analyzed and compared in the case of with and without refrigerant pumps. The results indicate that the COP of the refrigeration system with a pump can increase 31%. The reliability of system is also improved.
Research on Calculation Method of Equivalent Stress for Main Shaft in Wind Turbine
Authors: Guo Hong Che , Dai Lu Ping , Ding Chao Yi
Published: August 2013

The reactions, equations of moment and the overall moment of two planes were deduced based on mechanics of materials, as the main shaft was assumed to be a homogeneous three-section beam. Based on the fourth strength theory, equivalent stresses of three cross sections were solved. Based on the deduced conclusion, the equivalent stress of a various ultimate load cases were solved automatically by entering the loads of the hub center in the Excel, which was applied to the design and optimize for the main shaft.
Analysis and Study of the Transmission Path Based on the Body and NVH
Authors: Liu Xia , Yan Hua Jin , Liu Xiu Jie , Sun Xia
Published: August 2013

In the field of automotive engineering, noise and vibration in the car comes mainly from the engine and the road passed through the body, suspension, mount and exhaust system path to the car or reverberation. So this article , a model of white body transfer path analysis and research, improves the rigidity of white body, to reduce noise, vibration, and weight is reduced, and find out the resonance phenomena because of insufficient stiffness of car body, combining body CAE modal analysis results provide the theoretical basis for the optimization of structural damping.
Design of High-Efficient Bits for Igneous Rock in Xushen Gasfield
Authors: Zhang Li Gang , Yan Tie , Li Shi Bin
Published: August 2013

The igneous rocks in deep formations of the Xushen gasfield have the following characters: high abrasive property, high hardness, and high drillability, which lead to many drill bit accidents, few footage per bit , low efficiency of drilling, long drilling cycle, these severely restrict the exploration and development process of gas field. According to the features of deep formation, a hybird cutters bit is designed. It has three cones, with the overhang cone , duplicate taper and offset cone characters. The tungsten carbide cutters and the polycrystalline diamond compacts cutters are alternative collocation in the same tooth row in the bit. The exposed height of the tungsten carbide cutters is higher than polycrystalline diamond compacts cutters. The back rake angle of polycrystalline diamond compacts cutters is 10 ~ 40 °, the side rake angle is 10 ~ 30 °. The normal direction of working face stay the same with the composite slip direction, and the side rake pointed at adjacent gullet. Through the design method, it is integrated that the advantages of roller bit and PDC bit, the way of impact breakage and rotational shear breakage and the prominent performance of tungsten carbide cutters and polycrystalline diamond compacts cutters. It can improveROP and bit life.
Interactive Visual Modeling and Simulation for Virtual Maintenance of Aircraft Landing Gear
Authors: Li Zhong Hai , Chen Liang , Zhang Qing Cheng
Published: August 2013

Interactive visual simulation is an important tool in virtual maintenance of aviation equipment. This paper uses the virtual maintenance training of aircraft landing gear as the study object, applying parametric feature modeling technique in UG and in accordance with design requirements the 3D model of aircraft landing gear was established, meanwhile, using the cubic spline interpolation to solve the difficult problem of UG modeling. This paper focuses on using interactive three-dimension visual simulation methods and based on the agent model and its auxiliary model to realize assembly/disassembly process of landing gear. We propose a real-time method is using texture mapping and light render techniques to producing realistic animation. Based on the evaluation were carried out, since the animation is intuitionist, lifelike and didactic in character, it can be used to support the training of maintenance man and reflect the process accurately.
Evaluation of the Ecological Civilization Construction of Inner Mongolia
Authors: Zhen Jiang Hong
Published: August 2013

Based on the concept of ecological civilization construction, the paper constructs a comprehensive evaluation index system, standard and model of ecological civilization construction. Using Analytical Hierarchy Process based on Entropy Technical and Grey Correlation Method, the paper calculates and analyzes the ecological civilization construction level of Inner Mongolia during 1990 to 2010. The results show: The ecological civilization construction level in Inner Mongolia rises ceaselessly since 1990 and it is in the intermediate stage at present. The development speed of ecological civilization construction has stage characteristics during the study period and it has entered the period of accelerated development since 2003. But the development trend of each component index of ecological civilization construction is not the same. Ecological environment, ecological security and ecological economic index improved significantly, while ecological social and ecological culture construction level is relatively low and develop slowly.
Water Exchange in North Harbor of Lingang Economic Area, Tianjin
Authors: Zhang Chun Xue , You Xue Yi , Liu Yu
Published: August 2013

Water exchange ability is an important index for the evaluation of water environment and prediction of pollutant in harbor. In this paper, the hydrodynamic model and Lagrange particle tracking model were built. The water exchange ability of North Harbor in Tianjin Lingang Economic Area was analyzed. The simulation results provided a scientific guide for the water protection and ecological reconstruction in Tianjin Lingang economic area.
Remote Wireless Monitoring System for Wind Turbine
Authors: Hu Lan Xin , Feng Hai Bo , Yin Hai Meng
Published: August 2013

This paper probes into the design of the remote wireless monitoring system for wind turbine, based on STC89C54RD+ microprocessor. TC35 produced by Siemens is used to send and receive information. Through this we can obtain the Real-time information of the temperature and vibration of the wind turbines.
Study of Circuits Fault Detection Based on Infrared Technology
Authors: Liu Xin Qiang , Jiang Jian Guo
Published: August 2013

The circuit board fault detection based on infrared technology is a new non-contact and non-destructive method. During studying the system structure of circuit board fault infrared detection, the author analyzes the key influence factors of infrared information extraction, gives a new fault diagnosis method of infrared image processing and pattern recognition, then points out the problems in the practical application of fault detection instrument, provides the reference for the further study of the technology.
Design of Mine Ventilators Monitoring System Based on ZigBee
Authors: Fu Sheng , Lin Hao
Published: August 2013

In the current mine ventilators monitoring system, there are some difficulties in the installation and maintenance because of the wired connection. To solve the problem, this paper introduces a new ventilators monitoring system based on ZigBee in which the monitoring parameters are transmitted wirelessly. The collecting devices are designed to form a cluster network to collect temperature, vibration, air pressure and other parameters of the mine ventilator. All these devices are battery-powered. Besides, the monitoring software in PC is developed using MFC. Experiments show that the designed wireless sensor network works well in the site environmental condition and the system is very convenient to install since the wireless connection. This monitoring system will have a wide application prospect in the upgrade of the old monitoring system of the ventilators.
Design of Temperature and Humidity Monitoring System Based on Wireless
Authors: Gao Qiang , Gao Xiang , Wu Hai Qing
Published: August 2013

Aiming at the strict environment limit of existing technology and industrial production in the textile industry, a multi-point temperature and humidity monitoring system has been introduced based on the wireless sensor network. The data collected by the sensors was transmitted through wireless data transmitting module. And the base station will transmit the data received from this module to the computer after data processing. Thus the temperature and humidity data monitoring management has been realized in computer. This system is developed by using the Visual C++, and has realized the SQL Server database storage by using ADO technology. Finally, the environment monitoring in the textile factor has been received and the production requirements has been satisfied.
The Application Research on Underwater Riprap Recognition Using High-Density Resistivity Method
Authors: Yu Jin Huang , Wang Qiang , Jiang Fu Yu
Published: August 2013

We established a typical ripped-rock revetment engineering geoelectric model based the resistivity difference of ripped-rock and its surrounding rock. And we also realized the models’ forward and inversion calculation for different device types of high density resistivity method using finite element method. Results show that the α device could delineate the horizontal scope of the ripped-rock better, and the γ device could reflect the bottom of ripped-rock better than the other three device. In addition, we can also get riprap’s bottom boundary according to the gradient belt of resistivity of the β device. In a real world application, we use the small subdomain filtering technology to enhance the image, better divide the riprap distribution range.
Research on Structural Properties of FePt: C Thin Films with FePt Underlayers
Authors: Jin Ling Fang , Zhuang Hong
Published: August 2013

Nonepitaxially grown double-layered films were synthesized with a FePt: C composite layer on top of continuous FePt underlayer. The thickness of FePt was changed from 2 nm to 14 nm. Nanostructures, crystalline orientations and the effect of FePt underlayer on the ordering, orientation and magnetic properties of the thin films were investigated by transmission electron microscopy (TEM) and x-ray diffraction (XRD). XRD confirmed the formation of the ordered L10phase for 5 nm FePt: C film with FePt thickness decreased to 5 nm. TEM studies of FePt:C composite L10phase and double-layered deposition FePt:C/FePt were presented.
The Automobile Brake Guards against Holds the Dead (ABS) Simulation Experiment to Install the Brake Flowing Tubing Head Pressure Examination System the Design
Authors: Zhong Bao Hua
Published: August 2013

This article studied one kind of automobile brake which guards against holds the dead simulation experiment to install the brake flowing tubing head pressure examination system, the control design plan, and has conducted the thorough research to the ABS brake flowing tubing head pressure change process as well as the vehicle speed change relations.This system uses the flowing tubing head pressure sensor, transforms after A/D, computer processing, through the monitor by the curve form demonstration braking system flowing tubing head pressure change, and simultaneously, through carries on the logic analysis to the input flowing tubing head pressure signal, the computer sends out the corresponding instruction, broadcasts separately turbo-charged, guarantees presses with the reduced pressure animation.Thus realized the brake flowing tubing head pressure real-time examination, curve demonstration, animation time delay broadcast process.
Studies on the Low-Voltage Dynamic Reactive Power Compensation and Switching Control for Capacitors Device
Authors: Guo Qiang , Xie Xiao Lan , Li Yang , Chen Xin Yu
Published: August 2013

This paper is for the problems of the 400V low voltage power capacitor reactive power compensation and for the problems existing in the transient process, resuming the principle of low-voltage capacitor intelligent technology and its implementation briefly. Propose a synchronization of reactive compensation capacitor switching on-off control system based on the micro controller and adaptive control. Real-time monitoring system is used to access system active and reactive power changes in order to extract the zero voltage signals; intelligent control algorithm is used to realize the intelligence of capacitor reactive power compensation on-spot and cutting, which greatly reduce the over-voltage and flow phenomenon produced by the capacitor in the cutting process. The result checked by actual measured shows that the device is stable, reliable, and can be effective to on-site system reactive power compensation and realize intelligent cutting.
Study on Dynamic Performance of UPFC Based on PSASP
Authors: Li Lin Chuan , Chen Ye Fei , Zhang Fang
Published: August 2013

An improved power flow control method of UPFC was proposed with consideration of the dynamic performance of dc capacitor: the line power flow was controlled based on current prediction in the series side, while the bus voltage and the dc capacitor voltage were controlled by the modulation ratio and phase shifting angle, respectively. The transient model of UPFC was established by Power System Analysis Software Package (PSASP) using its User Program Interface (UPI). The simulation results indicate that the model shows a good dynamic performance of UPFC.
Design of the Wireless Data Acquisition System – Substation Management System
Authors: Li Jun Fang , Zhang Peng , Gao Qiang
Published: August 2013

Aiming at the problems of the poor extensibility, complicated routing and inconvenient for real-time monitoring of the traditional data acquisition of the Overhead Crane, the wireless data acquisition system was designed based on the industrial wireless transmission equipment. This system takes the use of ND250 digital radio, the Schenck weighting sensor and the industrial control computer. Combining with the weighting data management software in the upper system, the wireless data acquisition system of the Overhead Crane has been realized in this paper. Compared with the traditional data acquisition system, this system own the superiority of low power consumption, large network capacity and flexible organized-manners .
The Shear Failure Modes and Anisotropy Based on the Shear Strength Theory in Classical Solid Mechanics
Authors: Guo Shao Hua
Published: August 2013

The shear failure modes of anisotropic solids are studied here based on the elastic standard space of physical presentation, some new shear failure phenomena for anisotropic solids are presented. The relations between shear failure modes and anisotropy are discussed. The results show that there are obvious differences in shear failure modes for different anisotropic solids.
Determination of Clenbuterol and Florfenicol in Milk Using Miniaturized Solid-Phase Extraction Based on Hybrid Material
Authors: Wang Hui , Han Ye Hong , Cai Xue Mei
Published: August 2013

A novel sol-gel hybrid material was synthesized based on sol-gel method using TEOS as precursors, KH570 as modifying agent, and EGDMA as cross linking agent. The obtained hybrid material exhibited excellent affinity to clenbuterol and florfenicol, and successfully applied to the home-made miniaturized SPE device for extraction and clean-up of clenbuterol and florfenicol from milk samples. Under the optimized conditions, the consumption of the hybrid material as SPE sorbent was low to 20 mg. Satisfactory linearity ranging from 0.2-20 μg/mL were obtained with r20.9990, and the recoveries at three spiked levels were ranged from 90.7-103.7% with RSD less than 2.7%.
The Sintering Characteristics of Industrial Solid Waste Incinerator
Authors: Li Wen Yan , Tan Li , Kong Yan
Published: August 2013

Burning the industrial solid waste can form low melting point alkali salts to cause heavy sinters in the incinerator. The utilization of additives is proved to be effective to reduce the sintering in this work. Three additives (lime, kaolin and coal ash of an electric power plant) were mixed in different proportions with the industrial solid waste, and then an ash fusibility test was performed on the solid waste and the mixtures. The results show that, the solid waste exhibits a low melting point and the chemical additives can increase it efficiently. Furthermore, the anti-sintering mechanisms may conclude that the additives react with the alkali salts in the solid waste to form the high melting point materials.
Numerical Study of Ejector as an Expansion Device in Split-Type Air Conditioner
Authors: Sumeru Kasni , Henry Nasution , Ani Farid Nasir
Published: August 2013

This paper presents a numerical approach for determining the motive nozzle and constant-area of an ejector as an expansion device, based on cooling capacity of the split-type air conditioner using R22 as working fluid. The use of an ejector as an expansion device in split-type air conditioner can enhance the coefficient of performance (COP) system. Typically, the split-type air conditioner may be installed on the geographical area with moderate or high outdoor air temperature using capillary tube. For this reason, the motive nozzle and constant-area diameters of the ejector must be designed according to these conditions. The diameters of the ejector are crucial in improving the COP. The results showed that the motive nozzle diameter is constant (1.14 mm) with variations of the condenser temperature, whereas the constant-area diameter decreases as the condenser temperature increases.
A Study on the Effect of Exhaust Gases on the Indoor Air Quality Onboard Ships
Authors: Abdullah Hayati , Ariffin Arman
Published: August 2013

The understanding of the exhaust gas behaviour from ship plume is necessary in order to avoid serious operational problems onboard modern naval ships. The interference of exhaust gas on the air intake for ventilation system can result in poor indoor air quality (IAQ) and can adversely affect the performance of human and equipment onboard ships. This paper presents the results of an indoor air quality study carried out onboard a naval ship and focuses on parameters such as temperature, humidity and major air pollutants. An analysis of the velocity ratio K which represents the ratio of exhaust velocity to relative wind velocity will also be presented to demonstrate the effect of the velocity ratio K on the indoor air quality for three locations of the air intake for the ventilation system and two different conditions of the ship namely alongside and cruising at an economical speed
Biogas Flameless Combustion: A Review
Authors: Hosseini Seyed Ehsan , Wahid Mazlan A. , Abuelnuor Abuelnuor Abdeen Ali
Published: August 2013

Biogas which is produced by the anaerobic digestion of biomass and organic wastes by micro-organisms is biodegradable. Biogas is a type of renewable energy sources that can be used for lighting, heating, and transportation and small-scale power generations. Although it seems that biogas is not economical due to its low calorific values, various investigations have been conducted by various researchers. Flameless combustion of fossil fuel was introduced during last decade and it has been proven that it could be the best technique for biogas combustion due to its low production of NOxpollution. In this paper, the review of biogas, its resources, and the utilization of biogas on flameless combustion is illustrated.
Numerical Analysis of Elastohydrodynamic Lubrication with Non-Newtonian Lubricant
Authors: Cupu Dedi Rosa Putra , Bahari Adli , Osman Kahar , Md Sheriff Jamaluddin
Published: August 2013

Elastohydrodynamic lubrication is a form of hydrodynamic lubrication involving physical interaction between two contacting surfaces and liquid where elastic deformation of the contacting surfaces due to heavily loading applied will affect the elastohydrodynamic pressure and fluid film thickness significantly. In this paper, a line contact EHL is modeled through the cylinder contact to a flat surface to represent the application of roller bearing. This solution is limited to two dimensional line contact problem only, an infinite length of cylinder was used as physical modeling. The behavior of non-Newtonian fluid also was investigated using power law fluid model. Bearing speed is to be assumed in steady state and temperature is assumed constant. The bearing performance parameters such as pressure and film thickness of lubricated contacts are calculated using Newton-Raphson method.The results show that the peak pressure increases as the parameters such as velocity, load and material parameter were increases and the spike was found to shift to the center of roller. The film was almost flat at contact region and formed a dimple shape near the outlet flow. The value of pressure spike and minimum film thickness were smaller at lower speed and were increased during raising speed then the peak point was found to be shifted to center of roller.
Location Analysis of Electric Vehicle Charging Station Based on the Floyd Shortest Path Algorithm
Authors: Tao Lei , Tong Xing , He Xin , Xu Hui , Tan Zhong Fu
Published: August 2013

Whether charging the electric vehicle is convenient has an important impact on the promotion of electric vehicles, the construction of charging stations should minimize the total cost of charging the electric vehicles. In order to select the optimal building addresses of charging stations, this paper proposed a site selection method based on the Floyd shortest path algorithm. This method uses the analysis of the shortest charging path between the electric car rallying points by shortest path method, and combines the assumption of charging cost and the number of charging stations in order to minimize the total charging distance in the region. Through the example analysis, this method can select one or more optimal construction sites of charging stations in the regional networks quickly and conveniently, so that the minimum total charging distance can be got and the optimal economic benefits can be achieved, too.
Application of Improved FAHP for Nuclear Reactor Accident Emergency Decision
Authors: Yan Feng , Chen Li Sheng , Zhang Fan , Zhao Yun Fang
Published: August 2013

Emergency decision making during nuclear reactor accidents is a complex decision-process. The decision must take many factors into account, including many uncertain factors. Fuzzy analytic hierarchy process (FAHP) takes into account of qualitative factors and quantitative factors,which makes the decision more reasonable and scientific. In this paper, fuzzy mathematics is exploited to enlarge analytic hierarchy process (AHP) to the fuzzy condition. The maximum membership degree of each scheme is calculated through the establishment of fuzzy complementary judgment matrix, thus the optimal scheme is obtained. It shows that the fuzziness of evaluation index in the nuclear accidents emergency decision scheme selection process can be effectively solved by AHP so as to improve efficiency of emergency decision scheme optimization process and the accuracy of the results.
CLC number: V22;O159 Document id code: A
Performance Enhancement and Applications of Ionic Polymer Metal Composites (IPMC) - A Review
Authors: Farid Muhammad , Gang Zhao , Zhu Yu Min , Chatto Ashleigh , Javed Raja Ahsan
Published: August 2013

This paper presents an overview of ionic polymer metal composites (IPMC), various properties improving techniques employed in the last decade and its potential applications. IPMC consists of a polymer membrane sandwiched by metal electrodes. On application of a small voltage, it bends towards anode. Due to its low activation voltage requirement (1-3V), low weight, high flexibility and ability to take any shape, IPMC has attracted the attention of researchers whose current aim include enhancing the force output to make them applicable for use in industrial, underwater SONARS, energy harvesting and biomedical fields. This paper provides an overview of the efforts made by the research community over the last decade, the identified applications with the references for elaborated study.
Design and Simulation of Power System for Hybrid Sweeper Truck
Authors: Zhang Bing Li , Wang Lun Zhen , Xiao Fu Bin , Ou Xin Ying
Published: August 2013

A hybrid system scheme was designed for the sweeper truck, to solve the problems of high fuel consumption and poor emission performance of traditional sweeper. The control strategy was determined for the hybrid power system. The simulation model of hybrid sweeper truck was built with Matlab/Simulink, and off-line simulation was completed to verify the power system scheme and control strategy, the simulation results indicate that the hybrid sweep truck can realize functions of sweeper and improve the fuel economy.
A Compensation Approach of Backlash Nonlinearity in Dual-Motor Driving Servo System
Authors: Zhao Hai Bo , Zhu Yun Guo
Published: August 2013

Aiming at the control problem of dual-motor driving servo system with backlash nonlinearity, we proposed the model of system linear part. We used describing function methods to analyze backlash nonlinearity characteristic. The simulation experiments of nonlinear system with backlash were carried out. The results of simulation show that system represents residual self-oscillation with step response, nonstationarity with low speed tracking and error abrupt change produced by sinusoidal tracking reversing. In the end, we used compensation control strategy to weaken the impact of backlash nonlinearity on dual-motor driving servo system. Finally the simulation illustrates the effectiveness of the proposed compensation control strategy.
Research on the Dynamic Characteristics of Switching Power Supply
Authors: Zhang Jie Xi , Liu Yan Cheng , Zhang Qin Jin , Ren Jun Jie , Liu Si Yuan
Published: August 2013

In the fields of using green energy such as PV system and Wind power system, the step-up DC-DC converter, witch is used to convert the power, is now attracting more and more attention. The response characteristics and stability of one are key points for the performance of the whole system. However, it is complex to analyze the dynamic characteristics and control design. In this paper, the dynamic model of full-bridge DC-DC converter is presented, and transfer functions of the converter are derived by using state-space averaging method. And then the improved PI controller is designed. Finally, a laboratory prototype circuit with input voltage 220V, output voltage 600V is implemented and results are shown to confirm the validity of the designed switching device.
Design of High Gain CMOS Folded Cascode Operational Amplifier
Authors: Song Ming Xin , Li Yue , Xu Meng Meng
Published: August 2013

A high-gain folded cascode operational amplifier is presented. Structure of folded cascode operational amplifier and manual calculations are discussed in detail. Folded cascode structure for the input stage is adopted. Folded cascode structure can increase the gain and the value of PSRR. Folded cascode structure can also allow self-compensation at the output. The operational amplifier is designed in 0.35μm CMOS process with 5V power supply. The operational amplifier has high-gain and work steadily. The results of SPICE simulations are shown that the operational amplifier achieved dc gain of 110dB with unity-gain bandwidth of 74.3MHz and phase margin of 54.4 degree.
Integrated Evaluation on Soil Nutrients in Spring Maize (Zea mays) Field Subjected to Limited Irrigation
Authors: Zhang Heng Jia , Li Jun Hui
Published: August 2013

An experiment was conducted to explore the integrated evaluation on soil nutrients in spring maize field subjected to limited irrigation (LI) in oasis region. The soil organic matter (SOM), soil total and available nitrogen (STN and SAN) and phosphorus (STP and SAP), and soil available potassium (SAK) in 0~40 cm increment at harvest of maize subjected to LI were selected as the evaluation factors to calculate the weighing coefficient of each soil nutrient and the IEI for soil nutrients using the membership function in fuzzy mathematics. At maize harvest, differences were not significant (p>0.05) in SOM, STN, STP, SAP, and SAK within 0~40 cm increment among treatments and CK, but significant difference (p<0.05) was found in SAN, with the maximum SAN maintained in MI5, which was respectively 187.3%, 96.8%, and 41.2% higher over MI2 valued the minimum, MI1, and CK. The IEI was improved by 12.4% to 22.3% in all the other treatments and CK compared to the minimum marked in MI4, with the maximum valued in MI3 treatments. Therefore, after one year experiment, the optimized irrigation management was maintained in MI3 treatment due to its maximum IEI in all the LI regimes.
Research on the Large Plate Humidity Detection Based on the Capacitive Sensor
Authors: Yun Li , Jin Shi Hong
Published: August 2013

This paper introduces a flat plate capacitive sensor, used for humidity test on large plate, mainly expounds the structure, the sensitivity of sensor, detecting depth, detection circuit, etc.
Research on Status of Loss-of-Coolant Accident of Reactor Based on Manifold Learning
Authors: Liang Jie , Cai Qi , Yan Feng , Zhao Yun Fang
Published: August 2013

In order to improve the diagnosis performance of the types of Loss of Coolant Accident (LOCA), A diagnose model based on manifold Learning is built. As the manifold learning method using to reduce the observed parameters of reactors dimensions, the ANN is used to get dimension reducing mapping and modes classifying method. This method improves the ability of the model to identify as well as the robustness of it. The experiment results show that the systems diagnosis precision is high and the key parameters are analyzed efficiently.
Study on Quadratic Interpolation of Motion Control
Authors: Han Teng , Fan Yu Jin , Huai Jian Ming , Shen Long Zhang , Wang Wei Da
Published: August 2013

In order to achieve demand for high speed, high precision, high real-time performance, high stability, its more essential to algorithms of motion control. In this paper, two different types of interpolation methods design are time-divided method and digital integral method. So control system trajectory data processing speed higher, output pulse signal response fast, system error small, transient response fast, and stability system.
Exploration of Factors Influencing the Customer Satisfaction of E-Commerce: A Study Based on Website Features
Authors: Yang Lu Ming , Li Ducang Hai , Yang Xu Zhao
Published: August 2013

This study has the hypotheses of the factors influencing customer satisfaction of the website features and model, and uses AMOS 7.0 structural equation analysis to process questionnaire data. According to the path coefficients of structure model and the indices of fit that verify the hypotheses, this study reaches a conclusion that the factors affect customer satisfaction of e-commerce mainly contain website economy, website security, website informative, followed by the convenience and website interactivity, and website popularity and entertainment has little impact on customer satisfaction. Most of the hypotheses of this study are supported by empirical research. And the conceptual model that customer satisfaction of e-commerce is decided by the website service quality consumers perceived and customers expectations is set up.