bluuebunny/crossref_metadata_2025 huggingface dataset:
Strength Calculation Based on Contact Nonlinear Analysis of Coupler Bolt with Three Methods
Authors: Li Ya Na , Wang Chun Yan , Li Yong Ming , Rao Ben Teng , Zhang Lin
Published: August 2014

Bolts as the key connection parts are directly related to the safety of high-speed train. Contact nonlinear static strength of CRH (China Railway High-Speed) coupler bolt was analyzed on traction and compression load with ANSYS software. According to maximum stress of bolts was appeared on tension load, CRH bolt strength was evaluated and compared based on three methods: finite element analysis (FEA), "Verein Deutscher Ingenieure 2230 standard (VDI 2230)" and “Mechanical Design Handbook”. The results show that the axial tensile stress is much greater than the shear stress and gradually increase with three methods.
The Design of Automatic Control Temperature System for Greenhouse
Authors: Fan Yu , Wu Xue Feng
Published: August 2014

In modern agriculture, greenhouse environment implementation of automatic detection and control is necessary. The key technology of greenhouse facilities is the temperature control. The microcontroller is core processor and the temperature sensor is used to collect temperature data, and transmitting the data to the single chip microcomputer, the data collected will be sent to the digital display, so that operator could observe the current temperature. It can adjust the temperature environment inside the greenhouse in the system and flexible to meet the plant growth habits.
Design and Research on the Safety Control System of a Bus
Authors: Sun Gui Bin , Yang Fu Qing , Fang Qiu , Sun Xiao Ping
Published: August 2014

In order to improve the safety of buses, based on the research of bus tyre pressure and temperature monitoring system, the control strategy of independent safety control system is proposed, namely in the tyre abnormal initial sound warning prompt, later will enter the fault mode engine "limp home", limiting the power and velocity of the engine, but in the tyre burst or rapid leak the emergency braking control system can take effects for bus, while the engine is "idle" working mode, the driver controls the direction of travel and brake on the bus is just as input of emergency braking control system. Compared with the traditional tyre pressure monitoring system, the system can not only realize the tyre pressure abnormal warning, but also realize the emergency brake control, and the safety of control system which has been installed on the VDS A01 models achieve the basic performance requirements for our design. It has good practical value.
Research on Application of Fuzzy PID Control Based on PLC in Hot Press Control System
Authors: Ma Jing Jie , Zhang Xiao Li , Bian He Ying
Published: August 2014

This research constructed a hot press control system according to the hot-press technical process of wood-based panel, and applied the fuzzy control and traditional PID control to this system. Experiment and simulation results showed that the control effect of the new method is optimal.
Design and Realization of Monitoring System for Scheelite Alkali Autoclave Reactor
Authors: Luo Xiao Yao , Chen Bin , Zhao Fa , Ding Gao Xing
Published: August 2014

Aiming at the problems existed in the Production process of Scheelite Alkali Autoclave,The monitoring system and temperature control method for Scheelite Alkali Autoclave reactors were presented. The system use AT89S51 SCM as the core controller, monitor the temperature in the reactor and jacket belt on real-time, and then adjust the temperature by control the steam valve and the refrigerant valve with the Fuzzy-PID hybrid algorithm.The control result shows that it has good security and feasibility.
Study on Tobacco Flue-Curing Process for Curing Barn which Temperature and Humidity was Auto-Controlled
Authors: Ju Wen , Wang Yong , Li Xiao Yu
Published: August 2014

New flue-curing process which can accommodate new curing barn which temperature and humidity can be auto-controlled was studied. Based on results of the study on new curing barn and the baking theory, the flue-curing process for new curing barn was programmed. Flue-curing results of this new curing process for new curing barn were compared to the results of conventional baking process for conventional barn. The comparison result was that the new process was simple, convenient and easy-running. The quality of cured tobacco leaf from new curing process was improved: proportion of orange tobacco leaf, the first class tobacco leaf and the first/secondary class leaf was improved by 3.38, 4.74 and 2.03 percentage respectively than the value of conventional process. Meanwhile, the value of total sugar, starch, nicotine, total nitrogen, protein and the difference between total sugar and reducing sugar were lower than the result of conventional process. Chemical composition was more balance than conventional process.
Track-Hunting Intelligent Car Based on Linear CCD Sensor Using Fuzzy Controller
Authors: Yang Jin Tao , Tian Zhe Wen , Luo Jian Lan
Published: August 2014

Nowadays intelligent vehicles play a more and more important role in daily life. In this paper, a track-hunting intelligent car is presented for intelligent control research. In the direction control of this car, a fuzzy Proportional-Integral-Derivative (PID) controller is applied to make a distinction between different situations and execute self-tuning operation at the same time. The controller is tested by simulation and experiments in this paper, and results prove effectiveness of the controller.
The Energy Management Strategy of Photovoltaic Energy Storage System
Authors: Di Feng , Li Wei , Liu Fu Cheng , Zhang Guang Ru , Hui Guo Tao
Published: August 2014

In order to prolong the service life of the battery, ensure the operation efficiency of photovoltaic energy storage system, the establishment of a complete set of battery energy management strategies for photovoltaic energy storage system is very necessary because of the intermittent of solar energy. A strategy based on the state of charge of the battery to realize energy management strategy for photovoltaic energy storage system is proposed in this paper. The simulation verifies the effectiveness of the proposed method and the results show that the method can realize the purpose better.
Study on Treatment of Wastewater System Based on ARM
Authors: Du Zhong Bo
Published: August 2014

In this paper, ARM processor and real-time embedded operating system will be used in controlling system of sewage disposal, compared with the traditional controlling system of sewage disposal online PLC, not only improved the timeliness, reliability and scalability, but also enhanced the system speed. While, in order to control the low-cost, the Fuzzy-PID compound control algorithm used to control the amount of purifying agent, the algorithm can be adapt to the nonlinear and time-varying and improve accuracy. In this paper, the application of Matlab software to carry on the simulation experiment, proved the feasibility and effectiveness of the algorithm at last.
A Detecting System on Defect Area of the Strip Steel’s Surface
Authors: Li Jian Dong , Wei Yu Lan , Fan Ying Ying
Published: August 2014

Aiming at the phenomenon that the production line of the strip steel’s detection is fast speed and detection quantity of data is large, which are difficult for worker to detect on line, we put forward a detecting system on defect area of the strip steel’s surface. Using CCD camera regularly to collect the images of the strip steel’s surface and to reflect it back to the detecting device on defect of the strip steel’s surface, and adopting specific arithmetic to analyze and handle images, what can accurately sound a warning while it detects the defected image. It is convenient for worker to take corresponding measures right away. This system has simple structure, low cost, and high defect detection rate, which has the great promotional value.
Characteristics Detection Method for Material Surface Based on Polarization Vision Information
Authors: Li Rong Hua , Qu Bao Zhang , Zhai Feng Xiang , Zhou Ying
Published: August 2014

Comparing to ordinary light intensity measurements, polarization measurements have many advantages in studying the surface，atmosphere and exploring space. In order to obtain high-quality polarization information, the paper designs a three-channel synchronous acquisition device. It researches the feasibility of obtaining the characteristics information of material surface by polarization vision. It respectively measures the leaves, automobiles, cement wall these three samples’ reflected light’s polarization characteristics using the method of getting Stokes parameters. The experimental results show that the polarization characteristics have a great relationship with the characteristics of target, the measurement wavelength and the viewing angle. The method mentioned in this paper is vital to achieving material surface characteristics. At the same time , it provides a new way for geology and mineral resources exploration.
Researches on Segmentation of Overlapped Convex Targets
Authors: Zhao Yun , Zhu Ming Zhu , Shen Ying
Published: August 2014

Situation of multiple overlapped targets usually encountered when image processing technology was applied in counting and analysis. Effect of the segmentation directly affects the accuracy of counting and measurement. Three basic methods include concave points matching, distance transform and Hough Transform were introduced and compared in this paper.
Scale Distorted Target Recognition Based on Machine Vision
Authors: Chen Yu , Huo Fu Rong , Zheng Li Qin
Published: August 2014

Machine vision means to carry out measurement or judgment with machine instead of human eyes. In the field of target recognition, optical correlation technology is a main way to realize machine vision. Targets can be recognized and located with high precision taking advantage of optoelectronic hybrid joint transform correlator (OHJTC). However, when scale or angular distortion of the detected target exists relative to the reference template, the intensity of correlation peaks will decrease to a great extent, which restricted the recognition results greatly. In this paper, the development and principle of maximum average correlation height (MACH) algorithm is introduced. Through amounts of experiments, the controlling parameters of the synthesized filter are optimized, which makes MACH filter suppress background noise and widen recognition range of targets. To show the feasibility of this algorithm, simulative and optical experiments of the improved MACH filter are carried out. As an example, the recognition results of a fighter target in sky are given, which shows the scale distortion tolerance can reach up to ±23%. The actual effect of the improved MACH filter algorithm has been confirmed very well.
Vector Quantization by Minimizing Kullback-Leibler Divergence between the Class Label Distributions over Quantization Input and Output
Authors: Wang Hao Xiang , Yue Shan , Li Yang
Published: August 2014

This paper proposes a new method for vector quantization by minimizing the Divergence of Kullback-Leibler between the class label distributions over the quantization inputs, which are original vectors, and the output, which is the quantization subsets of the vector set. In this way, the vector quantization output can keep as much information of the class label as possible. An objective function is constructed and we developed an iterative algorithm to minimize it as well. The novel method is evaluated on bag-of-features based image classification problems.
A Low Cost Scheme of Scene Depth Map for Stereoscopic Video Streaming Using Single Kinect Sensing
Authors: Chan Din Yuen , Hsieh Chi Wen , Jong Tai Lang
Published: August 2014

This study mainly described a low-cost stereoscopic sensing scheme using a single Kinect device of Microsoft. Basically, the integration of infrared (IR) depth map with visible light image of Kinect could support the virtual 3-dimensional view. However, the precision and unstable displays are problems practically that means the unstable variation of 3D displays and distorted projections of Kinect IR projector make the depth maps non-reliable so that the virtual view usually non-acceptable with defects in many cases especially in low lamination and corners of the sensing objects. The study proposed an algorithm to rebuild a good depth map includes: free-holes filling, extrapolation and prediction of filling-loss holes, rectification and trimming of depth-edge deformation, modification of the depths for no-IR-detectable object and the sparse IR-detectable depths, and finally applying the bilateral filtering for the edge smoothing. The simulation result demonstrated that the proposed algorithm can provide an acceptable virtual 3-dimensional images and the calculation loads are suitable for real-time stereoscopic displays.
Research on Intelligent Image Watermarking Schemes Based on Optimization Algorithm
Authors: Wu Shun Wei
Published: August 2014

Watermarking algorithms are the one of the effective methods to protect the copyright of digital products. There are many types of watermarking algorithms, in this paper, methods based on optimization algorithms, also named computational intelligence, are surveyed. The detail procedure of watermark embedding and the watermarking extraction is described, and the basic theory application of computational intelligence is also analyzed. Finally, the advice of these types of watermarking algorithm is given.
Study on Reconstruction Techniques of Landscape Image
Authors: Sun Ying , Gao Guang Lin
Published: August 2014

The depth map is a basic diagram of the intrinsic; each pixel value represents the scene graph the elevation position of the object point. In this paper, the analysis methods for target classification elevation map. Figure elevation are visible depth image, the depth of the image is the distance from each point in the scene to the image capture device values ​​of the image as an image pixel value.
A New Turn-Off Fluorescence Chemosensor for Hydrogen Peroxide Based on Carbazole Derivative in Aqueous Solution
Authors: Shen You Ming , Kong Bo , Peng Xue Fen , Feng Shao Dong , Zhang Xiang Yang , Zhang Chun Xiang , Jin Jun Ling , Zhen Qing Yun
Published: August 2014

A water-soluble fluorescent probe was described for detecting hydrogen peroxide with the carbazole-derived as fluorophore and boronate moiety as recognition unit. The probe was developed as a turn-off fluorescent chemosensor with fast, high selectivity and sensitivity toward H2O2over other biological reactive oxygen species. What is more, the probe was quenched linear response to H2O2concentration in the range of 1.0×10−8- 2.0×10−5M and lower detection limit down to 6 nM (S / N = 3) was obtained.
Computation of Normal Depth in Horseshoe Shaped Tunnel Using the Rough Model Method
Authors: Achour Bachir
Published: August 2014

Normal depth plays a significant role in the design of open channels and in the analysis of the non-uniform flow as well. Currently, there is no analytical method for calculation of the normal depth in open channels, including the horseshoe profile. Current methods are either iterative or approximate. They also consider, unreasonably, Chezy’s coefficient or Manning’s roughness coefficient as a given data of the problem, despite the fact that these coefficients depend on the normal depth sought. In this study, a new analytical method is presented for calculating the normal depth in a horseshoe shaped tunnel. The method takes into account, in particular, the effect of the absolute roughness which is a readily measurable parameter in practice. In a first step, the method is applied to a referential rough model in order to establish the relationships that govern its hydraulic characteristics. In a second step, these equations are used to easily deduce the required normal depth by introducing a non-dimensional correction factor. A practical example is considered to better explain the advocated method and to appreciate its simplicity and efficiency.
Research on the Water Absorbent Laws of Injection Wells Formation
Authors: Wang Zhong Guo , Zhang Guang Yu , Li Yi Qing , Zhou De Kai , Song Wen Ping
Published: August 2014

Layered injection commissioning technology has become a key factor to the oil production. For different types of formations, the paper analyzes the absorbent law in different homogeneous formations with different boundary conditions. The paper also creates a composite reservoir model, and then describes changes of absorbent law under coupling effect. The method to do all of the above work is to solve the equation of dimensionless bottomhole pressure in different formation and boundary conditions.
Construction and Verification of Analytical Model for Eddy Current Testing Based on Multi-Layered Conductive Structures
Authors: Sun Jin Li , Li Zheng Long , Yuan Ying Min
Published: August 2014

Based on the Maxwell equations in time-harmonic conditions, analytical model for cylindrical coil above multi-layered conductive structures of infinite large is built, the general solution for integral expression of coil’s impedance is derived. As the complex computation and inconvenient adjustment for calculating precision of integral form, the truncated region eigenfunction expansion is adopted to derive the series expansion expression of coil’s impedance. Calculating precision is ensured by selecting the truncating radius and the number of summation terms properly. Use Mathematica and CIVA separately compute the impedance variation of coil above the single conductive layer of different thickness. The results are highly identical and verify the validity of series expansion expression. The expression can provide help for optimizing the parameters of eddy current sensor.
Displacement Measurement Using a Unique Digital Camera
Authors: Pereira João Antonio , Sabino Danilo Damasceno , Turra Antonio Eduardo
Published: August 2014

This paper presents a noncontact technique for displacement measurement based on the variation of the pixels positions of a target object in the images captured by CCD or CMOS sensor. A video from a moving structure is made and then it is analyzed frame by frame and the variation of the pixels position of the target object in the structure is calculated for each frame and related with the position of the object in the image. The proposed approach is evaluated to measuring vibrations of a reduced scale model of two-floor building lab structure, which focuses on the advantage of using a unique camera for measurements of structural vibrations. The results obtained are compared to reference model and have shown good agreement.
A New Classification Method for Stored Grain Insect Infestation Using KIII and SVM Based Electronic Nose
Authors: Li Jie , Xu Dong Lai
Published: August 2014

Insect infestation is a common problem for stored grain. In this paper, a novel pattern recognition approach combining an olfactory neural network entitled KIII with support vector machine (SVM) is proposed and used in conjunction with an electronic nose to generate recognition models. Using this approach, feature vectors are firstly processed by KIII model which stimulates information processing function of olfactory bulb, and then classified by SVM. Through optimization of SVM model parameters, the data are mapped into high dimension space and the stored wheat samples with different degrees of insect damage are distinguished successfully. The experimental results demonstrate that the proposed method can achieve up to 100% classification rate and significantly outperforms the conventional KIII-Minimum Euclidean Distance Classifier.
Multi-Objects Ultrasonic Tomography by Immersion Circular Array
Authors: Yang Liu , Xu Chun Guang , Guo Xiang Hui , Li Xin Liang , Lin Qi , Huang Ye , Sun Hao Yu
Published: August 2014

The typical application of ultrasonic tomography is the determination of process parameters like component flow rates and material fractions in industrial environment. Another promising application is non-invasive health monitoring in medical care. Both acoustic attenuation and acoustic impedance inhomogeneity are the main physical quantities that are used to reconstruct the image. When transmission ultrasonic waves are shadowed by hard tissue because of severe attenuation, the reflection mode can be an effective supplement. This paper provides multi-objects reconstruction images by reflection ultrasonic tomography, demonstrating the multi-objects imaging capability of an immersion circular array system. The circular array consists of 36 ultrasonic transducers with 0.5MHz frequency which are ring arranged and embedded in the container wall to serve as both transmitter and receiver. Each time one transducer is fired and in the meantime other transducers are enabled to receive signals. Ultrasonic transmitting, propagating and receiving of the circular array system are simulated by COMSOL Multiphysics® software, after that a series of image reconstructions of the objects with different numbers are obtained through ellipse algorithm.
Study of Experiments on Dosage of the Flocculating Agent of Pure Minerals for the Overflow of Concentrate of the Before Mineral Processing of Strong Magnetism
Authors: Zhao Li Bing , Meng Ao Shu , Zhang Jin Rui , Liang Bing , Wang Zhong Quan , Che Dong Mei , Li Xiao Xue , Yu Hao
Published: August 2014

Aimed at the characteristic that highcontent of hematite of valuable minerals in overflow of concentrate Before the strong magnetism from Sijiaying Concentrator, by that flocculation test of pure minerals of hematite, quartz, chlorite and investigate that flocculation effect of lime, PAC, PAFC of inorganic flocculants and PAM of organic flocculants to three kinds of pure minerals in this article. The test results show that the bigger sedimentation velocity difference hematite between quartz, chlorite when do not add any flocculants. When adding inorganic flocculants include lime, PAC, PAFC, flocculation effect is better to hematite and quartz, but flocculation effect is bad chlorite; Flocculation effect is better to three pure minerals when adding PAM of organic flocculants.
The Research of Intelligent Gas Leak Ultrasonic Testing System
Authors: Han Hui Ling , Sun Peng , Han Feng Bo , Wang Xin Ge , Xia Qing , Liang Jian Guo , Liang Shi Cong
Published: August 2014

This paper presents the basic principle of gas leak ultrasonic produce, the use of ultrasonic transducer array collecting leak ultrasonic signal, the signal filtering and power spectrum estimation of signal processing algorithms, intelligent gas leak detection system is developed. The detector is convenient to use, can realize quick check gas leak, application of virtual instrument for leakage signal analysis and processing, implementation of gas leak detection and estimation of leakage.
A Novel Measurement Method for Muzzle Vibration Responses Based on Image Technology
Authors: Liu Guang Sheng , Zhang Ben Jun , Yang Meng
Published: August 2014

The measurement of muzzle vibration responses during gun firing is one of the most important factors for successful design of gun. The use and result are limited by traditional method for the effect of firing environment, so new measurement method is required, the high-speed imaging technology is one choice. The application of high-speed imaging technology in measurement of muzzle vibration is focused on qualitative analysis, in order to discuss the quantitative analysis in this paper, images of muzzle vibration responses are obtained by using high-speed vidicon. Image pretreatment is done for post processing expediently, the process of pretreatment include de-noising by using wavelet transform method, gray processing by using averaged-value method and contrast improvement by using wavelet transform method. After image pretreatment, orientation and matching is done by using correlative matching method, and then the numerical of muzzle vibration responses during gun firing are obtained. So a novel method is afforded for measuring of muzzle vibration responses during gun firing, and the new method has practical significance in the gun’s design, research and production.
The Study of Intelligent Smart Car Based on msp430
Authors: Chen Jing Jing , Chen Qing Xie , Fan Yi Biao
Published: August 2014

In this paper a method of designing intelligent smart car based on msp430 MCU is introduced. The method uses automatic control theory, detection technology, and the mcu receives signals which were collected and transmitted by the sensors fixed in front of the car and tyre, then controls the navigation of the motor to make the car go forward or change direction with unmanned operation system. The paper shows the design of both the hardware and software of the intelligent car system. The tests show that the smart car functions well as expected. Also, the design can be applied in automatic parking system and manufacturer transportation.
Embedded Control System with SCADA Modbus Network for Monitoring Heat Treating Furnace
Authors: Wang Pu Bin , Chen Fei Yan
Published: August 2014

In order to control heat treating furnace temperature and transfer real time data, an embedded control system has been built. The system’s hardware was mainly made up of microcontroller, analog, digital and RS485 interfaces. It has the ability of exchanging data with an industrial PC via SCADA Modbus network. According to the features of control process and the hardware’s performance, the system’s software was divided into Modbus task, control task, I/O scan task, panel task, and alarm task. The RTX51 Tiny was used as software kernel. By running in cooperative multitasking manner, the five tasks handle various functions of the system. Each of the five tasks is introduced. The task scheduling is explained. It is shown that the system can meet the requirements of process control and data acquisition. With the advantages of multitasking structure, simple hardware frame, reliable network communication and low cost, the design method we mentioned is valuable for developing embedded control systems.
Analysis of Magnetic Field of the New Phase-Shifting Transformer
Authors: Wang Zhong , Zhao Jing Hong , Li Bing
Published: August 2014

A novel phase shifting transformer is proposed for the application of multi-pulse rectifier, which is based linear motor, and has the advantages of simple structure, easy to manufacture, etc. Introduces the operating principle. Without considering flat phase shifting transformer longitudinal end-effect and transverse end-effect, analyzes the magnetic field distribution of the flat phase shifting transformer, it provides an optimal way to this novel phase shifting transformer.
The Design of the Visualized Electric Pre-Warning System in the Working Face Floor
Authors: Li Xiao Ming , Xiang Xiao Rui , Zhou Qi Mou , Li Yong Jun , Liu Zhi Gao
Published: August 2014

According to the causes and characteristics of coal floor water disasters,this paper designs the visualized electric pre-warning system in the working face floor,introduces the theoretical basis and purpose, and elaborates the function modules and software structures.The system, connecting the original high density electric instrument device into a network, adopting the spacial synchronous monitoring technology in the underground electric field,collecting the apparent resistivity informations of the equipment in real time through the computer network, can be used to carry out the real time monitoring study of the water disaster from the coal seam floor.Practical application shows that the results obtained can effectively reflect the actual situation and the system has good application prospect in coal mine water inrush disaster prevention and treatment.
Transient Responses in Continuous Co-Phase Traction Power Supply System
Authors: Li Xing Wang , Yang Ju Rui
Published: August 2014

Continuous co-phase traction power supply system is the major change of the traction power supply. It is important to analyze the transient response characteristics of overhead contact line for the traction substation feeder protection. This article introduces the main structure of continuous co-phase traction power supply system and the control strategy of traction substation. Meanwhile, transient responses of overhead contact line in the earth short circuit are studied, including metallic earth short circuit and non-metallic earth short circuit (high resistance ground). In the PSCAD/EMTDC electromagnetic transient simulation environment, the effects on the system and the recovery process are studied which the fault occurred in the output interface of traction substation and occurred in overhead contact line.
Injector Nozzle Multiphase Flow Numerical Simulation of High Pressure Common Rail System
Authors: Hu Yan , Li Guo Xiu
Published: August 2014

The changing of injector nozzle structure will influence the combustion and emission properties in diesel engine. Three-dimensional numerical simulation of multiphase flow of mini-sac nozzles of high pressure common rail were calculated by using the computational fluid dynamics ( CFD ) method in this paper. The results shown that this method can be more accurately obtained a lot of useful information on the flow field inside the nozzle in a relatively short period of time, and it is convenient for analysis and research the influence of geometry parameters on the flow characteristics inside the nozzle. The paper also studied the influence of nozzle inlet pressure, the angle between the axis of the hole and the axis of the injector and nozzle entrance radius to the flow characteristics inside the nozzle. It also studied the distribution of internal pressure, velocity of flow, gas-phase volume fraction and turbulent kinetic energy. These studies provided a favorable basis for the design and improvement of the nozzle structure and optimize combustion system matches.
Study on Rotational Speed Intelligent Regulation of Diesel Generator Based on Fuzzy PID Algorithm
Authors: Zhang Le Yu , Jin Zhao , Pan Xiao Bin , Yan Jian
Published: August 2014

Based on a mathematic model of diesel generator mechanical centrifugal governor and the traditional PID control and fuzzy control, a fuzzy PID controller is designed so as to accomplish the self-adjustment of diesel generator mechanical governor parameters. The fuzzy PID controlling diesel generator mechanical governing system is simulated by Simulink and the simulation results suggest that the fuzzy self-adjusting PID control owns the merits of well dynamic property, strong robustness and better adaptability compared to the traditional PID control. Therefore, the performance of diesel generator rotate speed governing system is largely advanced.
Lissajous Curve of an Auxiliary Winding Voltage Park Components for Diagnosing Induction Motor Inverter Defects
Authors: El Menzhi Lamiaâ , Saad Abdallah
Published: August 2014

In this paper, a new method for voltage inverter feeding induction motor fault diagnosis is presented. It is based on the so-called the Lissajous curve of an auxiliary winding voltage Park components. For this purpose, time domain mathematical model of a three phase induction motor fed by an inverter and expressions of the inserted winding voltage and its Park components are presented. Simulation results curried out for non defected and defected inverter show the effectiveness of the proposed method.
Experimental Study on Discharge Coefficients of Windward Window in Buildings with Wind-Driven Cross Ventilation
Authors: Wang Qiao Ning , Guan Yan Ling , Liao Qi Hai
Published: August 2014

Focus on the prediction of flow rates in buildings under natural ventilation, the investigation conducted a series of model rooms with cross ventilation. The impact of window-wall ratios, windows configurations as well as corresponding flow rates was investigated. The object of this investigation is to analyze characteristics of windward window opening discharge coefficient by measuring static pressure difference and the flow rate through windows. The conclusion are as follows: For large openings, the discharge coefficient of windward window opening increases as the window-wall ratio grows up; With windward window-wall ratio of 44.4% and 11.1%, the discharge coefficient of windward openings is almost irrelevant to flow rate and less affected by leeward window area; However, with windward window-wall ratio of 2.78%, the discharge coefficient increases slightly as flow rate rises, and the larger the area of leeward opening is, the smaller the discharge coefficient of windward opening becomes.
Applying Virtualwind Software to Analyze Indoor Natural Ventilation of Traditional Dwelling Architecture - Experiences from the Panxi Village, Jingdezhen City, Jiangxi Province, China
Authors: Nie Zhi Yong , Chen Qi Quan
Published: August 2014

Virtualwind is a quantitative software which can be used to analyses fluid flow, especially within the indoor natural ventilation aspect. Most of patio-style traditional dwelling architecture in Jiangxi Province has a poor ventilation condition, such as uneven distribution of wind speed. In this research, a traditional dwelling architecture located in Panxi Village, Jingdezhen City, Jiangxi Province, is taken as an example. Through adopting Virtualwind software to simulate indoor natural ventilation, it offers potential suggestions to develop the poor ventilation condition by the results of the research.
Research on the Region Division for Supercritical CO2 Cooling Heat Transfer in Gas Cooler
Authors: Xie Ying Bai , Chen Yi , Wang Ti Jun
Published: August 2014

In gas cooler, a key component of transcritical heat pump system, CO2 is always in supercritical status. A well design gas cooler should get the full informations of supercritcal CO2 in-tube cooling heat transfer characteristic. An EES program is developed to calculate the supercritical CO2 cooling heat transfer performances based on 4 selected correlation equations. According to the results and the thermopgysical parameters of supercritical CO2, such as specific heat, density, thermal conductivity and dynamic viscosity, two region, the starting area of supercritical region and the main supercritical region, is suggested for supercritical CO2 cooling heat transfer by temperature at 80°C. In the staring area, the variations of heat transfer and other parameters are intensive, while in the main supercritical region, the variations are clined to be stable.
Discussion on the Application of the Plug Fan Parallel
Authors: Yu Yan Zhou , Liu Qiu Xin
Published: August 2014

This paper takes a large public building in large space as an example, comparative analysis of two case designs chosen to calculation the amount of air handing units wind turbine volute section with plug fan and conventional centrifugal fan, the results show that using plug fan not only has high efficiency, small size , low operating cost, but also through the closure of a number of plug fan and using frequency conversion technology to achieve energy saving.
Research on Cryogenic Property Inspection Technology of Cryogenic Vessels with Valve
Authors: Li Qian , Xu Wei Pu , Chen Wen Fei , Li Yu
Published: August 2014

According to the current development situation of valve used in domestic cryogenic vessel and the level of product quality, through comparison and analysis similarities and differences of cryogenic vessels with the technical standards in cryogenic property inspection technology at home and abroad, then put forward to the basic requirements and key technical indicators for cryogenic property test aspects of cryogenic vessels with valve, provide suggestions for the establishment of national standard for cryogenic vessels with valves in China.
Scanning Measurement of Coated Glass Color-Difference and Design of Anti-Interference
Authors: Zhang Bao Jun , Bi Wei Hong , Zhang Yu , Liu Qiang , Xing Jing Wei
Published: August 2014

Based on the colorimetric theory and combined with the production process of glass industry, a color-difference measurement system was designed. The system was applied to online color-difference detection for coated glass. Scanning measurement of color-difference based on spectroscopy was detailed, and the technologies of light source modulation and signal demodulation synchronization were introduced into the system. This avoided using sensor masks or soft curtain to eliminate backlight interference. Under the light source with fluctuations and other background noise, the new system can get robust measurement values. The experimental results show that the anti-interference method smooths the curve of color-difference, and improves the signal-to-noise ratio. The system meets the demands of practical color-difference testing, and provides a new method for online color measurement with high accuracy.
Buckle Propagation Analysis of Deep-Water Petroleum Transmission Pipelines with Axial Tension
Authors: Yan Sun Ting , Zhu Yin Fa , Jin Zhi Jiang , Ye Hao
Published: August 2014

Quasi-static finite element simulation is carried out on buckle propagation phenomenon of offshore pipelines under external pressure. Arc-length method and volume-controlled static analysis by employing hydrostatic fluid element F3D4 are employed to calculate the steady buckle propagation pressure. After verifying the validity of numerical model, emphasis is on the influence of tension on propagation pressure considering isotropic hardening elastoplastic and elastic-perfectly plastic materials. Parametric study is conducted to include the effect of diameter-thickness ratio, after which two empirical equations are derived by curve fitting procedure. Finally, some comments on the results obtained through rigid-plastic hinge model are presented and a modified plastic hinge model including effect of material anisotropy is derived. The results can serve as a reference for more reasonable design of buckle arrestors.
The Common Failures and Solutions of High TOC Analyzer
Authors: Xiao Yi Nong , Niu Fei , Fu Shi Feng
Published: August 2014

In this paper, we elaborated the common failures of the Total Organic Carbon (TOC) analyzer, and proposed the solution for each failures. At the same time, we also introduced the considerations of daily maintenances.
Electric Power Systems Kit
Authors: Egorov Alexander , Bannih Paul , Baltin Denis , Kazantsev Alexander , Trembach Anton , Koksharova Elizabeth , Kunshin Victor , Zhavrid Natalia , Vozisova Olga
Published: August 2014

This article describes the problem of practical knowledge lack in modern education system and gives the solution of the problem by creating the laboratory for the scale models production. This laboratory allows to create all 110 kV, 220 kV and 500 kV power equipment in all generally accepted scales. Low price of such scale models makes the product available for students of any educational institutions.
Research on the Performance of Point Absorber
Authors: Zheng Xiong Bo , Yang Yu Nong , Xie Peng
Published: August 2014

Rational exploitation of wave energy makes great contribution to relief the current global energy crisis. Power generation has been taken into the agenda as the main form to utilize wave energy. The point absorber in this paper is simplified to three modules: floater, pontoon and chain. Based on the theory of linear regular wave, the research task of the point absorber is to improve the conversion efficiency and device reliability. This paper researched on the double floater wave energy converter by hydrodynamic numerical calculation, studied the factors that contain the PTO system damping coefficient, wave frequency and the device mass and other factor which can influence the energy conversion efficiency. At last, we found an optimized method for the energy conversion efficiency.
Design of Medium Pressure Water Asphalt Heating Equipment
Authors: Mao Kun Li
Published: August 2014

In many fields such as asphalt concrete pavement, hot and liquid asphalt is a kind of necessary material. Medium pressure water heating is a new method for asphalt storage or heating with advantages such as safety, energy conservation and low pollution. Heating furnace is the key part for this closed cycle system, and two 800KW medium pressure water heating furnaces are adopted to supply enough thermal energy for the heating system to ensure asphalt working temperature. To ensure asphalt storage volume and strength, size and steel plate thickness of asphalt tank are calculated. Three-layer structure of tank wall is designed to reduce heat dissipation, which is of 5mm inner wall and 1mm outer protection layer filled with 60mm rock wool layer.
The Application of Frequency Converter Energy-Saving Technology for Air Compressor in Intelligent Industrial Park
Authors: Sun Qian , Song Ning Xi , Wang Qian , Chen Shang Ji , Wang Da Peng
Published: August 2014

An application of an energy saving device for air compressor in intelligent industrial park is introduced in this paper. The program of air compressor energy saving system, working principle, and technical features are described in details. Actual running result shows that the air compressor device can greatly improve the power quality of enterprise, enhance the power factor. This device plays a role of energy saver in manufacturing process, indicates the direction of technical innovation in intelligent power for industrial park, and provides reliable technical support.
Finite Element Analysis of Typical Beam-Column Joints in Yingxian Wood Pagoda
Authors: Han Jian Long , Qiao Guan Feng , Niu Qing Fang , Li Tie Ying
Published: August 2014

Yingxian Wood Pagoda is the highest standing ancient wood structure in China,with four shorter but stiffer storeys hidden between the five apparent storeys. The beam-colunm joints are highly varied. In this study,a model of typical beam-column joints of the pagoda was simulated in Abaqus. The material used in models was similar to the ones of the pagoda.Non-destructive cyclic loading test of the models under different vertical load were conducted.The hysteretic curves underdifferent vertical load were drawn from the test.And the skeleton curves were obtained by linking all peak moment points of each hysteretic loop. The energy –dissipation performance and bending stiffness of models were derived and discussed.
Loading Height on Reinforced Brick Masonry Wall’s Failure Mode and Seismic Performance with Finite Element Analysis Method
Authors: Niu Wen Qi , Zhang Wen Fang
Published: August 2014

Masonry structure, the number of large, wide area distribution, and earthquake damage survey, masonry structure severely damaged. In this paper, using the finite element tool ABAQUS, combined with an equivalent volume element simulation technology, the establishment of spatial finite element model to study the loading height of the brick wall failure modes and effects of seismic performance issues in depth analysis of its constant vertical pressure, different loading height seismic performance and failure modes under. The results show that: the greater the load height, the wall more prone to bending failure, otherwise prone to shear failure; loading height bigger, better ductility of the wall, the ultimate bearing capacity is smaller.
Mesophilic Anaerobic Digestion of Dairy Manure and Vegetable Waste Using Batch Reactor
Authors: Shi Lin Jun , Liu Wen Lan , Liu Hui Fen , Zhang Wei Yu , Ban Li Tong
Published: August 2014

Anaerobic digestion of single dairy manure, single vegetable waste, mixture of dairy manure and vegetable waste was conducted to produce biogas. Startup characteristic, leachate parameters and inoculation amount were investigated. The experimental results showed that anaerobic digestion can start up quickly with acclimated thickening sludge as inoculation sludge and 30% was appropriate inoculation percentage. Digestion of single dairy manure and mixture of dairy manure and vegetable waste appeared better buffering ability with higher alkalinity than single vegetable waste. Compared to single digestion of dairy manure or vegetable waste, mixture of dairy manure and vegetable waste is more suitable for anaerobic digestion. Under the conditions of TS=10% and T=(36±1)°C, cumulative biogas production of mixture of dairy manure and vegetable waste is 5281 mL during the period of 30 days and average daily gas production is about 176 mL. These results could provide theoretical data for practical biogas engineering.
Structural Analysis of a North China Large-Span Aqueduct with Pretensioned Steel Truss
Authors: Wang Pei Peng
Published: August 2014

In this paper, based on the theories of truss structure with the characteristics of the aqueduct structure, puts forward a new type of aqueduct structure system, the cable pretensioned truss structure under the use of state for the key point’s response spectrum analysis and elastic time history response analysis. The stresses induced by the analysis of structure of key parts are meeting the requirements of the current specifications, in the flexible working state. Pretensioned steel in this paper, the research aims to the whole assembly of the aqueduct structure characteristics and the theoretical analysis of the dynamic characteristics of this kind of structure design for the future research and provide some reference, so as to promote the new application and development in the form of aqueduct.
The Influence Law of Thermal Properties on Building Thermal Stability in Hot-Humid and Cold-Humid Area
Authors: Liang Shuang , Wang Shao Jun , Huang Ke
Published: August 2014

By means of the establishment of thermal stability evaluation model and simulating in Hua-feng factory residential building ,the influence law of thermal properties on building thermal stability are obtained,especially the influence law of heat storage on building thermal stability and the best thermal inertia index value of envelope enclosure in Hot-humid and Cold-humid Area.
Analysis of the Impact of Fine Aggregate Content on the Performance of Asphalt Mixture
Authors: Li Yan Li , Qiao Zhi Qin
Published: August 2014

In this paper, Superpave analysis system is adopted to determine the mix proportion of asphalt mixture. Performance tests were carried out on this basis. The results show that there is an improper content range of fine aggregate to improve the high temperature stability of asphalt mixture. But the more fine aggregate content, the better low-temperature crack resistance stability.
Architectural Performalism Based on Energy Issues
Authors: Li Lin Xue , Ma Sheng Jie
Published: August 2014

Faced with the energy problem in current society, this article proposes a new view of architecture and energy. Starting from elaborating the notion of architectural performalism, integrated with the evolution and status of architectural agenda of energy, this article presents energy shaping as a practical strategy of architectural performalism on basis of the energy issues.
Based on the ANSYS Analysis of the Open Hole in the Floor Cracks
Authors: Yao Shuai , Ma Fu
Published: August 2014

In this article, I use the finite element software ANSYS to research reinforced concrete the floor open a hole and the floor doesn't open hole when under horizontal load to cracking of concrete structure by the elastic stage, to the rebar yield, until the whole process of component damage is analyzed, and by comparing the two model of crack propagation and deformation on load. The corner of floor with a hole is easy to crack.
Design of Building Energy Consumption Monitoring System
Authors: Pan Chong Chao , Feng Zheng Qian
Published: August 2014

Building energy consumption has become large energy consumption in our country. In order to realize the full range of buildings energy-saving, this paper designed a building energy monitoring system and which can effective measure, monitor, control and regulate each energy equipment and systems within the building. It makes a large number of dispersed energy data sort, optimization, control and reasonable allocation by combining networking technology and cloud computing technology, forming the construction of community energy overall control, optimization, service and redistribution system. Finally realizes the monitoring, control of buildings energy consumption, achieving the purpose of saving the energy.