bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Application of GPR to Quality Detection of Tunnel Lining
Authors: Tang Shi , Bai Xue Bing
Published: July 2013

Ground penetrating radar (GPR) is a real-time, non-destructive testing technique using high frequency radio waves that can yield data with very high spatial resolution and the data can be acquired rapidly. It uses high frequency radio waves to inspect the interior of concrete structures and is widely used for tunnel construction due to its fastness, accuracy, continuity etc.. The paper takes a tunnel as an example, systematically introduced the work principles of GPR and elaborates on the successful application of GPR to quality detection of the tunnel lining. To mainly analyze the quality of tunnel lining such as lining thickness, non compact, cavity, crack etc.. It is important to eliminate the hidden dangers during the tunnel operation, and also give experiences and references for the quality detection of the similar tunnel construction.
Study of Crack Identifications in Coupling Beam Based on the EMI and ANN Techniques
Authors: Jun Zhang , Juan Tao , Tang Hong Mei
Published: July 2013

Based on EMI and ANN techniques, crack location in coupling beam was studied by the experimental platform which using the WK6500 impedance analyzer. Impedance curves of the different PZT was obtained to diagnosis the situation of coupling beam whether it was perfect or cracked, and then located the crack by neural network technique to if the coupling beam was cracked.
Structural Health Monitoring of Gantry Crane Based on EDGE Technology
Authors: Huang Guo Jian , Wang Dong Hui , Wang Wei Xiong , Wang Xin Hua
Published: July 2013

The closely combination of Internet of Things and on-site monitoring and control technology is the development tendency of the site monitoring and control technology, especially the special equipment safety monitoring technology. EDGE technology is one way of Internet of Things technology realization. EDGE technology is a digital mobile phone technology which allows improved data transmission rates as a backward-compatible extension of GSM. It is also considered as a pre-3G (2.75G) radio technology and is part of ITU's 3G definition. It is used as one of the aims of the project which allows the operators to keep abreast of the crane operation status. Then a software platform is developed to monitor the real-time stress. A software platform is developed via a lot of preliminary work as mentioned above. The information is collected by FBG sensors and transmitted to the demodulator, and then the software calculates strain by a formula given in. Finally we acquire the real-time stress in different parts of the crane. If the real-time stress exceeds the allowable stress, it issues an alarm signal to the operator.
Fault Recognition of Gear Pump Based on EMD Neural Network
Authors: Gao Shu Xiang , Chen Xiao Hu , Ding Yao
Published: July 2013

Aim at the non-stationary and time-variation characteristic of the gear-pump fault signal, proposing a condition recognition method for gear pump based on EMD and neural network. Take the vibration acceleration of case as the analysis object. Firstly,deal the signal with EMD, extract the main IMF components, containing the main information components. And then calculate its energy, and use the energy ratio to compose the feature vectors , which is used for BP neural network to identify the gear pump working state. The result reveals the EMD neural network method can recognize the working conditions of mesh-type high-pressure gear pump CB-KP63.
An Artificial Neural Network Recognition Method for Single-Phase Earth Fault of Ultra-High Voltage Power Grid
Authors: Lu Hai Wei , Wu Gang , Xiong Chao
Published: July 2013

Fault diagnosis is very important to make the system return to normal operation quickly after an accident. This paper diagnoses the specific component failure and failure area when the real-time motion information of inputting protection and switch transferred to a trained artificial neural network model by building an artificial neural network diagnosis model of components such as transmission line, bus bar and transformer, training the artificial neural network through taking the failure rule which is found by the historic fault data as a training sample. This method has obvious advantages in the accuracy and speed of diagnosis compared with the previous artificial neural network and overcomes the shortcomings of the incompletion of training samples and not well dealing with the heuristic knowledge.
Quantitative Evaluation of Laboratory Testing Capability
Authors: Tian Jin , Wang Xu Guang , Qiu Yang
Published: July 2013

In view of the differences and errors existed between traditional EMC(electromagnetic compatibility) laboratory and standard laboratory, we introduce the concept of laboratory proficiency testing, and presents the evaluation parameter related to laboratory proficiency testing, such as, correlation coefficient, peak retention rate, connection degree, finally comprehensive similar reached for the laboratory testing capability. We also verified the evaluation parameters proposed in this paper.
Transmission Line Fault Location Based on Hilbert-Huang Transformation and SVM
Authors: Bao Ke Qin , Wu Bao Xing , Xu Yun Hui
Published: July 2013

In the process of the Hilbert-Huang Transformation, empirical mode decomposition (EMD) and Hilbert Transformation of the IMF components may result in the terminal effect, utilizing the support vector machine (SVM) extend the signal sequence and IMF components to weaken the end effect. The paper analyzes the fault signal which extracted under the different fault conditions to complete the fault location. The simulation result shows that using SVM can effectively restrain terminal effect; In the different fault states can have a high positioning accuracy.
Application of Pavement Quality Indicator in the Construction Quality Instant Control of Asphalt Pavement
Authors: Guo De Dong
Published: July 2013

Firstly, basing statistical results pavement quality indicator (PQI) calibration value of asphalt pavement with different aggregate types and nominal maximum aggregate sizes, the importance degree of the influence of the two factors on PQI calibration value was obtained by using the statistical software of SPSS. Then, PQI was used to detect the compaction of asphalt pavement and the detecting results of loose laying density, loose laying thickness and compaction density of asphalt mixture were used to calculate the thickness of asphalt pavement. All results above were compared and analyzed with the detect results of cores. Finally, the construction quality process control method of asphalt pavement was described. Results show that the aggregate type and material quality is the important factor to the PQI calibration value; the density of asphalt pavement detected by PQI and the thickness calculated have fine correlation with the detecting results of cores, those detecting results are dependable; The construction quality instant control of asphalt pavement could be achieved by detecting the loose laying density and thickness of asphalt mixtures.
Detection of Rail Fastener Conditions Using Time-Frequency Entropy Based on Orthogonal Empirical Mode Decomposition
Authors: Liu Chong , Zhang Li Hua , Ren Tong Qun , Liang Jun Sheng , Wang Da Zhi , Wang Ke , Wang Tian Rao
Published: July 2013

A method based on OEMD (Orthogonal Empirical Mode Decomposition) and the theory of time-frequency entropy was applied to detect different rail fastener conditions. The original vertical vibration acceleration response of rail under different fastening conditions was obtained from outdoor experiment. The OEMD method was used to get orthogonal IMFs (Intrinsic Mode Functions) of the original vibration signal. The Hilbert time-frequency spectrum was then obtained based on the orthogonal IMFs and corresponding entropy was calculated and compared. The results show that the method is available to detect different rail fastener conditions.
Analysis of the Coral Reef Evolution Based on Satellite Remote Sensing Images
Authors: Xie Ming Xiao , Cai Yin , Li Meng Guo
Published: July 2013

Based on analysis of the ETM+ and TM remote sensing images of LandSAT satellites, the stability and evolution characteristics of the nearshore coral reefs at Changjiang, China was investigated. The results showed that the maximum distance from the outside edge of the coral reefs to the shoreline is 1.1km, and the corresponding minimum distance is 200m. From 1973 to 2013, the locations of coral reef chain are relatively stable with maximum variation 50m. Generally, the natural tidal currents and waves can not destroy the coral reefs, and the human activities do not change the biological environment of the coastal area. Therefore, the Changjiang coral reefs could keep stable in the long term.
Design of Analysis Software for Measured RCS Data
Authors: Chen Bo Lin , Li Yun Tao
Published: July 2013

Radar cross section is an extremely important parameter in narrowband radar application for space target detection, tracking, and identification, as well as for the purpose of threat assessment. An analysis algorism, together with related software for measured RCS data has been developed to extract information from the original data. Some analyzing methods for measured RCS data were introduced. The playback visual simulation process and data processing were elaborated, so as to handle the processing of software program. Finally the software running results were analyzed. The experiment results showed that the software could be used for the issue of analysis of measured RCS data in a reliable and systematical way. As a result, it provides us with a strong guarantee for space surveillance.
Application of Classified Hierarchical Model to Fault Diagnosis of Electrical System
Authors: Yang Xiao Qiang , Han Jin Hua , Chen Liu Hai , Gao Ya Ming
Published: July 2013

The expert system for fault diagnosis based on classified hierarchical model is addressed so as to improve the maintenance capability of engineering vehicles under complex battle environment. The analysis of fault feature, fault pattern and failure mechanism of the whole machine and its electrical system is accomplished. Furthermore, the structure of classified hierarchical diagnosis model and method of knowledge representation are implemented so that the knowledge base of the fault diagnosis system can be developed. The forward reasoning mechanism of the fault diagnosis expert system is bring forward based on neural network intelligent reasoning that can achieve fuzzy input and multiple fault diagnosis. This work effectively increases the fault maintenance, diagnosis and support capabilities of the military troops.
Design and Realization of Control Module Fault Analysis System Based on Fault Tree
Authors: Hu Jin Hui , Hu Da Bin , He Qi Wei
Published: July 2013

In the process of equipment support for diesel engine control system of a certain type of ship, aiming at the problem of fault location of circuit module is complex and low efficient, the circuit module fault tree of control system is established based on fault tree theory. Qualitative and quantitative fault analysis is processed. The control module fault analysis software is researched and developed. The practical application shows that the functional fault control module can be analyzed and diagnosed fast and accurately. And the control module fault can be accurately positioned and processed.
Research of an Expert System for Fault Diagnose of the Airborne Electronic Devices Based on VC ++ and CLIPS
Authors: Zha Guang Dong , Diao Li Feng , Liu Xu Peng
Published: July 2013

In order to solve the problems that diagnosis cycle is very long and diagnostic accuracy is very low dependent on the maintenance man to diagnose fault by experience, an expert system for fault diagnose of a planes airborne electronic devices based on VC++ and CLIPS is proposed. The information exchange is realized between VC++ and CLIPS through writing external function of CLIPS by VC++ platform. The fact base can be generated quickly through acquiring test parameters from test model according to the fault information template base. The expert system established by VC++ platform to write man machine interface codes and load CLIPS to realize fault reasoning can realize the fast fault diagnosis for the airborne electronic devices.
Fault Diagnosis for Marine Diesel Engine Based on Class Label Probability and Random Walk
Authors: Zhang Ai Ping , Ren Guang , Jia Bao Zhu , Lin Ye Jin , Zhang Jun Dong
Published: July 2013

Cluster methods can be used for fault diagnosis of marine diesel engine. We propose a cluster method by assigning a class label to each sample and updating it according to the class label probability. Due to the random walk process in cluster process, multiple results are obtained, and some classes can be found more easily. Fault diagnosis simulation experiment is executed on a self-manufactured marine engine room simulator to verify the method performance, and we obtain the correct graphical and number results. Both fault patterns in fault history and new fault pattern can be recognized.
Tolerant System Reliability and Performance Evaluation with Imperfect Tests
Authors: Zeng Tao , Chen Jie , Zhang Tian Wei
Published: July 2013

The key system which requiring very high levels of reliability often use redundancy to enhance reliability index, e.g. tolerant system. During system operation, tolerant system monitors system state and reconfigures it to realize continuous working with system drawback. Considering the inevitable errors in system online test and the performance degradation, an estimation method for both system reliability and performance is proposed in this paper. Through analyzing the important fault mode in tolerant system, establishing the system reliability model based on k-out-n:G system description, and then considering the imperfect tests and corresponding performance degradation in these process, the reliability and performance evaluation method is given, moreover, the engineering operation flow of this method was established for it. An aircrafts rudder system is taken as an example for engineering application, which shows that this approach is feasible and effective.
An Image Measuring Method for the Fabric Defect Detection System
Authors: Li Wen Yu , Cheng Long Di
Published: July 2013

In order to realize fast measurement of fabric defect dimensions, an image measuring method is presented for the fabric defect detection system. Based on the image measuring theory, a suitable structure of the system hardware is constructed by using common device used in the fabric defect detection system. A new CCD calibration method based on grid targets is applied to the system. The experimental results show that the method is effective, high accuracy and easy to implement.
Theory and Application of Fracture Dynamics in Concrete
Authors: Zhang Yi Kun
Published: July 2013

Lattice Discrete Particle Model (LDPM) provides accurate representation of concrete behavior under cycling loading both in tension and unconfined, confined, and hydrostatic compression. In this paper, LDPM is used to simulate tensile fracturing as demonstrated by the successful simulation of three points bending tests on notched specimens, the result show that it is able to reproduce pre-peak nonlinearity as well as softening post-peak behavior. It reproduces realistically the development of crack pattern due to tensile stresses and also could predict correctly size effect on specimen load carrying capacity.
Permanganate Based Chemiluminescence Analysis of Cefoperazon
Authors: Zhang De Yi , Zheng Li Wen
Published: July 2013

In this paper, a novel method fog determination of chemiluminescence (CL) spectra utilizing LS55 luminescence spectrophotometer was proposed. By this means, the CL spectra generated from the oxidation of cephalosporins with potassium permanganate was investigated. The result indicated that acid potassium permanganate CL system has more then three emitting species, excited state Mn(Ⅱ), Mn(Ⅲ) and singlet oxygen all could be assigned as the possible emitting species of this CL system. Base on above investigation results, sodium cefoperazone in pharmaceutical samples was determined by a CL analysis process combining with flow-injection technique. The detection limits estimated by a conservative model (3σ) of cefoperazone was 0.1µg dm-3, and the maximum relative standard deviation (RSD) was not more than 0.8 % (n=11, ρ=20µg dm-3).
The Influencing Factors Analysis of Reinjection Sewage to SZ 36-1 Oilfield Reservoir
Authors: Feng Pu Yong , Wang Hong Bin , Han Guang Zhi , Peng Xue Fei , Wang Da , Cai Yi Na
Published: July 2013

This paper discussed the effect of Suizhong 36-1 oilfield reinjection sewage on core permeability in different suspending particle sizes, different concentration of suspended substances and different injection volume of water. The experimental results showed that: The larger the suspended particles diameter, the greater the concentration, the higher the injury rate; The lower the formation permeability, the greater the damage; The core permeability was markedly decreased with the increase of the volume of injected water; The formation damage degree was D11 > mixed injection > well water.
Synthesis and Evaluation of Acid Self-Diverting Agent
Authors: Wang Ji Gang , Zhao Wen Xiu , Han Guang Zhi , Liu Qing Wang , Fan Zhen Zhong
Published: July 2013

An acid self-diverting agent compound by betaine type surfactant and quaternary ammonium salt type surfactant was synthesized and evaluated. Found that when the pH value was higher than 1, acid viscosity rose rapidly, and the pH value up to 3, acid viscosity reached its maximum value (300mPa s), and can effectively made the acid diverse.When the pH value was 6, the system completely gelouted, easy to flowback; When added the self-diverting additives, acid system had better temperature resistance; With the elevated of concentration of the self-diverting agent, the apparent viscosity of acid increased, when the concentration of the self-diverting agent was more than 5%, the acid apparent viscosity increased little, gradually stabilized, but all above 300mPas, meet the industry standard requirements.
The Preparation of Carbon Nanotube/Sodium Silicate Composite Film
Authors: Chen Ran , Ding Gui Fu , Wang Yan , Lu Wen
Published: July 2013

A novel method of preparing CNT/sodium silicate composite film is put forward. By grinding and mechanical ball milling to get a homogeneous mixture, solidifying to form composite film and then exposing the CNTs on the surface of the film with their roots still in the sodium silicate by selective etching, the composite film was fabricated. Thanks to the wettability and adhesion between CNTs and sodium silicate the mechanical property of the film is improved. And the surface morphology of it is well-distributed and controllable. Such composite film is suitable to be applied in electrochemical sensor and field emission cathode.
Preparation of Nanometer Sized Cuprous Oxide and its Photocatalytic Performance over Four Nitrophenol
Authors: Liang Yu
Published: July 2013

Nanometer sized Cu2O is synthesised by nucleation crystallization separation and redox methods, with NaBH4 as reducing agent. It takes several researching methods, such as XRD,SEM,EDS and UV-vis, etc, to study the structure, composition and spectral features of the product. The results show that, comparing with traditional methods, the Cu2O particles produced by nucleation crystallization separation and redox methods have following features: similar appearances, small particle size, and narrow distribution, etc. The photocatalytic experiment shows that, this kind of Cu2O has excellent photocatalytic activity over four nitrophenol.
Preparation and Properties of Cage-Like Nano ZnO
Authors: Liang Yu
Published: July 2013

Synthesis multilayered cage-like nanozinc oxide by hydrothermal method. The structure, composition and morphology of the composite precursor and the calcination were studied by means such as XRD, SEM, EDS and TG, etc, and the formation mechanism was preliminarily discussed. The result shows, the molar ratio of C6H12O6/Zn2+significantly affects the appearance and regularity of the cage structure and the thickness of the cage wall. The cage wall has porous structure feature, and might has unique photocatalytic property.
Research on the Material of the Propellant and Structure Characteristic of the Engine in Miniature
Authors: Li Yao Yao , Jiang Chun Lan
Published: July 2013

In order to solve the time of the propellant of the engine in miniature too short, the power of the propellant of the engine is not enough. In this article, the material characteristic of the engine material and the structure characteristic of the engine are analyzed. Also the reliability of the material and the structure characteristic is researched. This article could be used as reference for the design of the rocket engine.
A Novel System for Sedimentary Organic Carbon Isotope Sample Preparation
Authors: Zhai Zheng , Liu Qing , Xu Xing You , Li Ju Yuan , Li Zheng , Li Xiang Chen
Published: July 2013

A new type of isotope preparation system was designed with excellent accuracy, high degree automation and high security. In view of the existing equipment with automation low degree automation, poor safety, much long preparation time and low precision of the sample preparation problems, a series of improvements were introduced, such as the automatic sampling device, contact valve, vacuum auxiliary system, gas meter and digital dashboards. It was found that the instrument finely designed had the characteristics such as high accuracy, automation and security. Combined with the sample detection device, the preparated sample had excellent detection results. Meanwhile, a set of standard operating procedures had also been formed. Furthermore, the sample preparation process was briefly discussed.
Density Functional Theory Investigations of the Mechanical Properties of Anatase: A Computer Simulation
Authors: Xu Chao , Chen Dong
Published: July 2013

The lattice parameters (lattice constantsa, c), elastic properties (elastic constants, bulk modulus, shear modulus) and optical parameter (dielectric function) are investigated from a theoretical perspective using computer simulation in the frame of density functional theory. The calculated lattice constants and elastic moduli are in agreement with the theoretical results. We found that anatase can retain its stability in the pressure interval 020Gpa. The anisotropy of this compound is found to increase with applied pressure. Moreover, the dielectric functions are also discussed. The plasma frequency and static dielectric constant of TiO2are 16eV and 6.1, respectively. * Corresponding author: Dong CHEN
Broad Band Microwave Dielectric Measurement of Liquids with an Open-Ended Coaxial Probe
Authors: Shi Jia Ming , Balzano Quirino , Davis Christopher C.
Published: July 2013

The principles of the open-ended coaxial probe technique for the measurement of permittivity are described. Measurements of dielectric properties are carried out over a frequency range from 300MHz to 50GHz, with a system comprising an Agilent E8364B network analyzer and a connected 2.2mm diameter open-ended coaxial probe. Water, methanol and salines of 0.1M, 0.2M, 0.6M are used as calibration liquids or liquids to be measured. Measured permittivities are presented and compared with those calculated from the Cole-Cole equation. It is shown that, in order to get good results, the calibration liquid should be similar to the liquid being measured in dielectric properties.
Microstructure and Mechanical Properties of FeAl Coating Deposited by Low Pressure Plasma Spray
Authors: Yang De Ming , Tian Bo Han
Published: July 2013

The FeAl intermetallic compound coatings were deposited by low pressure plasma spray, air plasma spray and high velocity oxy-fuel spray. The influence of three kinds of thermal spraying processes on the microstructure, microhardness, elastic modulus and fracture toughness of coatings was investigated. The results show that the FeAl coating deposited by low pressure plasma spray presents special mechanical properties such as higher microhardness and elastic modulus as well as lower fracture toughness, when compared with those by atmospheric plasma spray or high velocity oxy-fuel spray.
Microstructure Distribution of Soft Clay under Conditions of Stratigraphic Profiling Variation
Authors: Song Jing , Tang Lian Sheng , Sang Hai Tao
Published: July 2013

Base on the microscopic structure is characterized by anisotropy of microstructure that inherent in the process of saturated soft clay with sedimentary primary anisotropy or external force caused by induced anisotropy, biological changes along with the trend of the minimum potential energy. By studying the spindle rotation stress characteristics of the soil of the microscopic distribution, the pore characteristics of saturated clay sourced from microstructure pictures in Pearl River Delta region of south China is analyzed considering the microstructure in different stress conditions. Microstructure distribution of soft clay under conditions of section profiling variation including the anisotropy ratio law of pore characteristics are focused to study saturated clay. It is found that major-minor axis status induced the directional property of saturated soil in the process of consolidation by vacuum preloading. And porosity shapes factors which are small indicate directional property would be probability entropy which is able to calculating the chaos of overall arrangement, and it will be a lower value because of directional property. It is apparently inconsistent with the pore distribution of saturated clay which results from the cut section of different point of angle. And horizontal joint and large pore space constitute one of the saturated clay structure characteristic, which related to different pressures.
Morphology Measurement on Phenolic-Resin/Vitreous-Silica-Fabric Ablation Composites Modified with Tetraethoxysilicate and Silsesquioxanes
Authors: Hu Yu , Zhang Xing Wen , You Hong
Published: July 2013

This study focused on phenolic-resin/vitreous-silica-fiber (PR/VSF) ablation composites modified with silsesquioxane (SSO) and tetraethoxysilicate (TEOS). Three nanohybrids based on TEOS-SiO2(T-SiO2), octamethyl-SSO (Me-SSO) and phenyl-SSO (Ph-SSO) were prepared and employed to modify the PR/VSF ablation materials, T-SiO2/PR/VSF, Me-SSO /PR/VSF and Ph-SSO /PR/VSF. At a high temperature, the modified PR/VSiF coatings were melted under heats and then generated pre-ceramic bodies, avoiding damages from the heats for the parts of the body inside. To compare ablation properties of the three modifiers, the correlation of the material structures and ablation properties were discussed with ablation tests and morphology measured by SEM. As a result, the linear and the mass ablation of the three composites are in the order of T-SiO2/PR/VSF > Me-SSO/PR/VSF > Ph-SSO/PR/VSF. Therefore, the properties of Ph-SSO show that it is suitable and more effective as a modifier for ablation materials. In the temprature of about 2000oC, the results of ablative coating basically reached the expected technical indix.
Ethanol Sensitivity of Thermally Evaporated Nanostructured WO3 Thin Films Doped and Implanted with Fe
Authors: Ahsan M , Ahmad M.Z. , Tesfamichael Tuquabo , Bell John , Yarlagadda Prasad K.D.V.
Published: July 2013

Ethanol sensing performance of gas sensors made of Fe doped and Fe implanted nanostructured WO3thin films prepared by a thermal evaporation technique was investigated. Three different types of nanostructured thin films, namely, pure WO3thin films, iron-doped WO3thin films by co-evaporation and Fe-implanted WO3thin films have been synthesized. All the thin films have a film thickness of 300 nm. The physical, chemical and electronic properties of these films have been optimized by annealing heat treatment at 300oC and 400oC for 2 hours in air. Various analytical techniques were employed to characterize these films. Atomic Force Microscopy and Transmission Electron Microscopy revealed a very small grain size of the order 5-10 nm in as-deposited WO3films, and annealing at 300oC or 400oC did not result in any significant change in grain size. This study has demonstrated enhanced sensing properties of WO3thin film sensors towards ethanol at lower operating temperature, which was achieved by optimizing the physical, chemical and electronic properties of the WO3film through Fe doping and annealing.
A Mathematical Model of Dynamic Coefficient of Thermal Expansion for ZrO2 Multiple Phase Ceramics
Authors: Sun Quan Ping , Wu Hai Bing , Chen Qian Liang
Published: July 2013

In order to control cutting depth of preheating ZrO2 sintered ceramics accurately, linear expansion elongation of preheating ZrO2 multiple phase is measured; on the base of the measured data a mathematical model of thermal expansion coefficient given at different preheating temperature is put forward. Its fitting-error from-9μm to +2μm is very small compared to the data of linear expansion elongation measured. Some milling experiments that cutting force is following preheating temperature have been done by the amending cutting-depth from the model. The experimental results show that the cutting performance of ZrO2 sintered ceramics preheated not only turns better but also extends cutter life.
Density Functional Theory Study of the Mechanical and Electronic Properties of Rutile TiO2: A Computer Simulation
Authors: Xu Chao , Chen Dong
Published: July 2013

In this paper, we investigate the structural, electronic and elastic properties of rutile using the ultra-soft pseudo-potential scheme in the framework of density functional theory, together with the generalized gradient approximation. The calculated lattice constants and elastic constants are generally consistent with the other results. Our aim is twofold. First, density functional theory is a fine theory that can obtain reliable results. Second, rutile can be used in the modern industry, thus it should be carefully investigated. The elastic constants dependences on pressure are calculated. It is found that rutile is stable in the pressure range of 020Gpa. The anisotropy of this compound increases with applied pressure. Besides, the analysis of band structure is also given. The calculated band structure shows that rutile belongs to direct-forbidden-gap semiconductors.
Determination of Eight Parabens in Water-Based Food Simulants Migrated from Antibacterial Plastic Packaging by LC/MS/MS
Authors: Li Xiao Jing , Tang Xi , Zhou Xue Hui , Chen Min Shi , Dai Jin Lan , Xiong Wen Ming , Zou Zhe Xiang , Liu Hua Jian , Lv Shui Yuan , Lin Hua , Lian Ming
Published: July 2013

A method based on reversed-phase liquid chromatography-tandem mass spectrometry (LC/MS/MS) combined with solid phase extraction (SPE) was developed and validated for qualitative and quantitative detection of eight parabens in three types of water-based food simulants including distilled water, 3% acetic acid, 10% alcohol. Detection limits of eight parabens after SPE procedure were 0.005-0.010 μg/L in distilled water, 0.006-0.015 μg/L in 3% acetic acid and 0.005-0.017 μg/L in 10% alcohol. The relative standard deviations (RSDs) were in the range of 1.90-8.48% for distilled wsater, 1.01-3.73% for 3% acetic acid and 5.78-12.97% for 10% alcohol. The method could make a complement for detecting parabens migrated to food and feeds.
Study on Grinding by a Double-Sphericity Abnormity Media
Authors: Mo Wei , Feng Jin Peng , Ma Shao Jian , Yang Jin Lin , Su Xiu Juan
Published: July 2013

A double-sphericity abnormity media as grinding media was presented, and the grinding laws of cassiterite-polymetallic sulfide ore by the abnormity media and single ball media with different combinations were discussed in this paper. The results show that when adopting the abnormity media to replace its mother balls for grinding, the mother ball size is smaller, the grinding effect is better, and adding the abnormity media was helpful to decrease overgrinding. And for cassiterite grinding process, the desirable results could be achieved by using small size abnormity media to replace large single ball media.
A New Hybrid Power Train for Low Speed Light Truck
Authors: Wang Ren Guang , Chen Heng Tao , Zhang Lin Tao , Yu Chao , Shi Chuan Long
Published: July 2013

A new kind of power train was developed for low speed lorry with top speed less than 70km/h. this new hybrid power train is mainly consisted of clutch, transmission, engine, engine controller, vehicle controller, power battery, electric motor, and main differential. The main differential has a set of gear for power input, which is for engine and motor power coupling. This new system can provide pure engine driving, pure motor driving, hybrid driving, and braking energy regeneration according to different conditions, which can save energy and improve efficiency.
The Design of Firing Mechanism Controlling Research of Natural Gas Vehicle Cylinder
Authors: Xu Wei Pu , Liu Yi Ting
Published: July 2013

This article described the current situation and the security risks of the natural gas vehicle cylinders, which introduced the principle of the fire test, proposed the general idea of the fire test equipment. Wireless network, video systems, data acquisition systems and computer-controlled system of the equipment researching are also introduced.
A Derivative Type Subjection Functions Application in the System Efficiency Evaluation of Gun
Authors: Wu Zhao Jun , Tu Shan Chao , Lv Xiang Qun , Jiang Jian Jun
Published: July 2013

The no-dimension of the systems capability is an important content in the system efficiency evaluation, and how to evaluate the capability is an essential step in the system efficiency evaluation. The thesis derive a new function from the subjection function and apply it into the weapons mechanization capability evaluation.
Modeling and Simulation for Super-Mild Hybrid Electric Vehicles
Authors: Shi Jian Fei , Zhang Bo Jun , Wang Yu
Published: July 2013

Analysis the super-mild hybrid electric vehicle and its transmission system, the transmission system model of low-gear is established through bond graph. Establish vehicle control simulation model, development of low-gear control strategy to simulation. The simulation results show that the fuel economy and emission performance are improved.
Research on the Micro Self-Vibration of Aerostatic Bearing with Pocketed Orifice Type Restrictor
Authors: Zhu Hong Xia , Lin Yingxiao , Zhao Jing Yi
Published: July 2013

In this paper, Computational Fluid Dynamics (CFD) is used to analyze the micro self-vibration of aerostatic bearing with pocketed orifice type restrictor as the bearings performance is stable and it is widely used ultra-precision equipments. By using Large Eddy Simulation (LES), time-variation flow field inside the bearing is obtained. Then the pressure fluctuation characteristics is discussed because it influences the micro self-vibration of the bearing directly. Moreover, the relationship between bearing diameter, orifice diameter, air chamber diameter, air chamber depth and the micro self-vibration is researched. The results can be considered for the designing of ultra-precision aerostatic bearing with pocketed orifice type restrictor.
The Study about Fuel Tank Flammability Analysis Method of Civil Aircraft
Authors: Liu Wei Fan , Zeng Tao , Fan Min
Published: July 2013

This article discusses the aircraft fuel tank flammability. Firstly, Given the qualitative analysis of aircraft fuel tank flammability, Based on this, Detailed discussion of the quantitative analysis method based on the Monte Carlo method of aircraft fuel tank, and verified through the instance. The results show that the analysis can determine the main factors affecting fuel tank flammability and fuel tank flammable levels of exposure. And have engineering application value on aircraft fuel tank safety.
Implementation of One Kind of Side Impact Method for Child Restraint System Based on Sled Test
Authors: Liu Zhi Xin , Zhang Yu Bing , Wei Ming Jiang , Zhang Yue
Published: July 2013

Although accident analysis shows that side impact accidents continue to be dangerous for children in cars, the majority technical regulations of Child Restraint Systems (CRS) are focused on the crash performance under the frontal and rear impacts and do not include a side impact test, the main reason is that no good method to test side impact performance of CRS has been agreed on yet in the world. In this paper one side impact test method based on double sled concept is presented and realized. And several CRS models are tested; injury response values are measured from child dummy. It is observed that the sled buck concept is repeatable and able to distinguish preliminarily between CRS models.
Design and Manufacture of 3D Flat Woven Fabric
Authors: Yan Shu Juan , Lv Li Hua , Wei Chun Yan , Wang Xiao , Cui Yong Zhu
Published: July 2013

In the ordinary loom, the 3D woven fabrics like the orthogonal/connected stitching structure, angle Alliance/interlocked stitching structure by the reasonable transformation, weaving diagram and looming draft, have been woven in this paper. Using ordinary loom weaving fabrics, it would not only save the cost of production, but also has good controllability of woven fabrics. Good structural design and integrity of the 3D woven fabrics, own tight fabric structure, superior mechanical properties, low price, and broad application prospects. The results shows that this design would give a basis for further study on the development perform of 3D textile structural composite materials.
Analysis on Construction Delay of Suburban Roads
Authors: Ma Yan Ting , Ma Chun Jie
Published: July 2013

As one of large engineering projects, suburban roads plays an important role in urban construction, however, there exists a great many risks in the entire constructing process, which restrict the course of the project in varying degrees. It may cause the construction delay, property loss, and even leave serious quality problems if handled improperly. This paper analyzes the reason of suburban roads construction delay from three aspects which are owner, construction and supervision units, and give some corresponding countermeasures for reference.
Study on Risk Assessment of Power System Static Security in Severe Weather
Authors: Yang Hai Jing , Guang Shi , Kai Li , Yang Luo
Published: July 2013

The historical statistics show that the fault probability of power system components in severe weather is significantly increased. In recent years, severe weather has become one of the main risk sources of the safe operation of power system because of its frequent occurrence. Based on risk theory, we fully consider the possibility of power system fault in severe weather, and use branch overload, bus voltage violation and loss of load as severity indexes of power system static security in severe weather, and build a risk assessment model of power system static security that it can provide an effective tool to identify the weaknesses of the power system static security in severe weather. Finally we illustrate the application of the model combined with numerical example.
Digital Games and Independent Learning
Authors: Xie Bo Yang , Zhao De Cai
Published: July 2013

[Objective] The research of digital games characteristics and connotations are to explorecreating favorable conditions of independent study; to analyze the learning motivation, learningactivities and process, self-confidence, aesthetic ability of students during the activities of thedigital game, to learn the impact of creativity.[Methods] Simulation, experimental teaching, thecomparison of experimental and traditional teaching methods are used. [Results] The experimentsshow that the vast majority of learners on the digital game for learners to create learning conditionsand elements, as well as to develop learners' abilities and have made a positive evaluation (M= 4.059, SD = 0.732). Endorsement or in favor of digital games very much are to improve theircapacity for cooperation and autonomy which accounted for 93.6% and 78.2% respectively;endorsement or in favor of such an environment favorable to learning accounted for 78.4%; that thelearning environment for students to learn positive emotions accounted for 95.8%; 87.1% of the testthat the environment to cultivate their sense of learning. [Conclusion] Digital game provides theindependent study of effective resources, environment, elements, activities and processes, but alsocontains the self-motivation to learn; digital game activities contributed to enhancing learners'self-confidence, aesthetic skills, creativity, help to lead to a research study of the learners; aneffective way of learning is the integration of learning and entertainment.
Study Online Course Evaluation System
Authors: Xie Bo Yang , Zhao De Cai
Published: July 2013

[Objective] This paper investigates new Web-based course content in the Networkenvironment, the role of curriculum evaluation and significance, the evaluation methods, processes,and should adhere to the principles of the network. [Process and methods] The process and methodsare compared with the traditional environment through experimental research, theoretical researchand system analysis combined with the digital network environment, access to experimental controlwith a combination of survey methods. [Results] It focuses on teaching content, learning resourcesand resides among the contents of teaching strategies and learning strategies of evaluation,involving students, teachers, learning materials, online teaching support systems, learning supportand service system in each part. evaluation of online courses plays a guiding role in guiding thedesign and development of online courses in the right direction; By analyzing the course of learningresources, learning process and its causes, we can determine its effectiveness, shortcomings,contradictions and problems and find out the reasons, ways and measures for improvements. canimprove the network quality of the course and optimize teaching. [Conclusion] Online courseteaching evaluation of network can provide reliable protection and guidance function, and it is astrong fulcrum in the whole systems engineering courses and online teaching.
Research on Handling the Conflict of Project Resource Based on Multi-Level Grey Comprehensive Evaluation Method
Authors: Ge Mao Gen , Liu Ming Zhou , Zhang Ming Xin , Hu Jing , Yi Li Li
Published: July 2013

Research on frequent resource conflict in project-driven enterprises to establish the evaluation index system by integrating multiple evaluation rules of project activities, and evaluate two or more activities or tasks in the resource conflict by the multi-level grey comprehensive evaluation method, in which the one that has the highest evaluation value will be given priority to use the resource. The use of specific examples shows that it is practicable to tackle with the resource conflict of the enterprise.
A Teaching Evaluation Model Based on Fuzzy Multiple Attribute Decision Making
Authors: Wang Mei Li , Li Long Long , He Dong Jian
Published: July 2013

Practical decision making, such as fuzzy multiple attribute decision making, involves many uncertainties with respect to all elements of the basic decision making model. Soft-computing approaches such as fuzzy inference and theories of fuzzy mathematics have been widely developed to achieve practical decision making. This paper proposes to select a representative scheme among a large set of available options by applying fuzzy extremum analysis. According to the objective function, the method standardizes an input vector through the intuitionistic fuzzy set, from which we construct the conversion relationship tables and finally calculate the optimal solution by fuzzy membership functions. The proposed method has been tested on teaching evaluation of Shaanxi Polytechnic Institute.
Rapid Measurement of Power Transformer Winding DC Resistance
Authors: Luo Xiao Fei , Xia Xian , Wu Kai Jun
Published: July 2013

Aim at the electric power transformer with inductance is large, resistance is small, the inherent characteristics of the large time constant, a fast measurement scheme of power transformer winding DC resistance is proposed. The scheme adopts the increase the measurement circuit loop resistance mutation method, in which the circuit transition process from a time constant is forced to another time constant, to realize the rapid measurement of winding DC resistance in power transformer. Simulation results show the effectiveness of the scheme.
Research of Scientific Computing in the Engineering Linear Algebra Teaching
Authors: Chen Feng Xin
Published: July 2013

In this paper, we use some examples to discuss the necessity of using computer software to convert mathematical theory into numerical computations, which can combine classical theory with modern computing and make the abstract concept visualized, then give the future engineer a good foundation for further studies in mathematics as well as other subjects.
Knowledge Acquisition of Domain Ontology Based on the Documents
Authors: Hu Zhao Qin
Published: July 2013

In this paper we put forward the framework of domain knowledge acquisition based on the documents with the ontology theory and knowledge acquisition theory. We present four aspects of the framework for knowledge acquisition: establishing domain core ontology, text preprocessing, domain ontology knowledge acquisition and improving domain ontology. A core ontology is the core concepts and relationships of the domain area. Text preprocessing mainly analyzes and processes Chinese webpage to generate sets of words. Domain ontology knowledge acquisition parses the core ontology and completes concept matching and ontology editing. Improving domain ontology is to infer and evaluate core ontology expanded and make the ontology more scientific and reasonable. The proposed framework can be applied as a useful benchmark or guidance in domain knowledge acquisition.
Research on the Optimizing Adjustment of Locomotive Circulation Layout
Authors: Li Cheng Bing , Li Wei , Chen Wei Dong
Published: July 2013

After years of research, the writer puts forward the strategy of optimizing adjustment of locomotive circulation layout. First of all, generate the most possible locomotive long circulation optimization in the solution space as "alternative set" according to certain principles. Secondly, an optimization adjustment strategy is proposed and a rough set-based extension multi-objective decision making model is established based on the "alternative set" to get the best plan. In the end, its advancement and practicability is provided through calculating examples. The study not only is a breakthrough for adjustment of locomotive affair productivity distribution, but also fills the blank in the implementation of the locomotive long circulation theory system and framework.
Applications of RiverCAT in the Field Measurement of Reservoirs
Authors: Jing He Fang , Li Yi Tian
Published: July 2013

SonTek’s Riversurveyor Catamaran (the RiverCAT) is a fully integrated river discharge measurement system. In this paper, the RiverCAT is applied to measure the topography under water in a middle industry water supply reservoir. The whole measurement process is introduced. Area of each cross-section is calculated with complex trapezoidal quadratic formula, and the capacity of the reservoir is computed with complex prismaid quadratic formula. The relationship between capacity and water level is researched by regression analysis method.
Research on Material Demand Forecast Model and its Application
Authors: Han Qing Tian
Published: July 2013

Firstly, analysis was presented for the problem of material demand forecast. Secondly, the single moving average and double moving average method were applied to the material demand forecast. Finally, an actual numerical example was presented to illustrate the model. The result shows that the model is reasonable and easy to carry out for engineering.