bluuebunny/crossref_metadata_2025 huggingface dataset:
One-Step Hydrothermal Controlled Synthesis of HgTe Nanorods
Authors: Jiang Kun Peng , Jiang Li , Liao Lei , Yu Wei Ping , Qin Ai Miao , Wei Chun
Published: March 2013

This paper describes a one-step hydrothermal synthesis of rod-shaped HgTe nanocrystals (NCs). X-ray powder diffraction (XRD), field scanning electron microscopy (FE-SEM), transition electron microscopy (TEM) and energy-dispersive X-ray analysis (EDX) have been used to characterize the HgTe NCs. The length, diameter, surface roughness and the aspect ratio of the HgTe nanorods are well controlled through Te precursor, reaction time and reductant.
Research on Calculation of Molecular Connectivity Index
Authors: Tao Wei Ye , Wang Lai You , Huang Guo Quan , Zhou Hua Ying , Luo Man
Published: March 2013

Compared to other topological indices, molecular connectivity index has good structural selectivity and correlation.According to the molecule’s 2D and 3D topology file, we conducted research on the mol2 format file to consider how to convert the ASCII file into the adjacency matrix. Based on the adjacency matrix, we analyzed the relevant algorithm to calculate the molecules’ molecular connectivity index through adjacency matrix. As a molecular descriptor, the molecular connectivity index can be used in QSAR.
Preparation and Characterization of 1-methyl-3-butyl Nitrate
Authors: Tian Peng , Kang Yan Hong , Zhao Zhi Gang , Qin Tian Ling , Meng Bo , Du Wen Le
Published: March 2013

1-methyl-3-butyl Imidazole chloride is prepared by 1–methyl imidazole and chlorinated n-butane. The synthesis reaction of 1-methyl-3-butyl imidazole tetrafluoroborate is in the acetone. The solubility of NaNO3and BMIC in acetone is not large, but due to the insolubility in acetone of reaction product NaCl and continuous precipitation from the liquid phase in the reaction process, so as to promote the reaction continuously towards forward direction. The colorless transparent and odorless BMINO3are gotten. We use infrared spectrometer for the structure characterization, it is proved that we have gotten BMINO3room temperature ionic liquids. BMIC and BMINO3ionic liquids have better solubility in H2O, ethanol, ethyl acetate, acetone, acetonitrile, and methanol, and is insoluble in the ether and cyclohexane.
Thermal Analysis of Heat Sink Employed on Tunnel Lighting Lamps
Authors: Feng Qiao Bo , Zhu Rui , Tang Guoan , Zhang Jia Jie , Zhu Yun
Published: March 2013

As a new type of solid-state light source, LED has many advantages. Its lifetime and lighting effect are related to its thermal performance. In this study the effect of heat sink cooling capacity from factors were researched, and the factors were such as material of heat sink, height of heat sink and the number of fins. It was observed that the cooling capacity of heat sink increases with increasing of thermal conductivity. Copper and silver are not fit for heat sink materials though they have excellent cooling capacity because of their high density and price, while aluminum and its alloy are the better choices. And it was revealed that the cooling capacity of heat sink increases with increasing of the height of fins, but this trend has slowed down when the average height reached 40mm.It was also observed that the cooling capacity of heat sink increases with increasing of the number of fins when fins are less, while the heat sink was higher, the cooling capacity maybe decrease with the increasing of the number of fins.
Dynamic Load Simulation Analysis of Hemp Stalk
Authors: Liu Xue Qiang , Zhang Jian Chun , Zhang Hao , Hu Xin
Published: March 2013

The distribution of maximum equivalent stress on hemp stalks at different roller speeds were scavenged by LS-PREPOST function. The stress and strain distributions of hemp stalk under the transversely even-distributed load are analyzed through ANSYS software. The results show that hemp decortication largely depended on the rotation speed of separation roller and the feeding rate. In addition, the failure degree of bast fiber, the maturity and the water content of the stalk, and the difference in mechanical properties and geometrical size should be also taken into account.
Model Study on the Key Hydrodynamics in the Bohai Sea
Authors: Liu Hao , Luo Dan , Yin Bao Shu
Published: March 2013

A surface wave and 3-dimensional current interaction model is used to reproduce the hydrodynamics in the Bohai Sea (BS). Simulated tidal harmonic constants, wind-driven currents and significant wave heights show reasonable agreements with observations. It is found that the semidiurnal tides are dominant by and large, and the maximum wave height appears in the central basin.
Numerical Simulation of Typhoon Waves along the Offshore China Seas
Authors: Kong Cong Ying , Cao Hong Sheng , Pan Xi Shan , Zhang Wei Yi
Published: March 2013

The model of WAVEWATCHIII was applied to simulate two consecutive typhoons, number 1104”Haima” and number 1105”Meari”, and then the results of calculations were compared with the buoy data. The results show that under the influence of the typhoon, sea surface wind field and the significant wave height have similar symmetrical structure in the space distribution. In terms of time, with the development of typhoon, changes of the wind speed cause an invisible effect in wave height which explains that the wave height has very strong dependence on the wind speed. The analysis shows that the WAVEWATCHIII can simulate the characteristics of the typhoon wave.
Study on Volleyball Athletes Foot Pressure Acquisition Method
Authors: Shu Min , Li Yi Yang , Liao Xing Zhi
Published: March 2013

How to improve training records and skill level, and try to minimize sports injury at the same time, has increasingly become the focus of Volleyball Professional Training Design. This paper puts forward a method to acquire the foot pressure information of volleyball athlete. By utilizing PVDF film which has the advantages of fast response, high sensitivity, good mechanical properties etc., the array of pressure sensors and signal conditioning circuit have been designed and produced. Tested, this method can accurately in real time acquire volleyball athlete’s foot dynamic pressure distribution information.
Design of Rigid Package Container with Telescopic Mechanism Used in Ultra High Pressure Food Processing
Authors: Li Rong Li , Liu Xiao Yong , Zhang Shou Qin
Published: March 2013

A novel structure of rigid package container (RPC) used in ultra high pressure food processing was presented, due to single and flexible food package occupying large volume and less repeat usage. This new container was designed in details, such as mechanical analysis on sealing process of o-rings and structural optimization on its key components of RPC. Experiments on the sealing properties had proved that this structure was reasonable and reliable in sealing, easy to assembly and disassembly, compact structure and light weight. Thus, the RPC could be applicable in many ultra high pressure vessels in food industry.
Non-Linear Dynamic Characteristics of Single-Layer Shallow Reticulated Spherical Shells
Authors: Yang Zhen , Chen Yu Lian , Han Ming Jun
Published: March 2013

The nonlinear dynamical equations are established by using the method of quasi-shells for three-dimensional shallow spherical shells with circular bottom. Displacement mode that meets the boundary conditions of fixed edges is given by using the method of the separate variable, A nonlinear forced vibration equation containing the second and the third order is derived by using the method of Galerkin. The stability of the equilibrium point is studied by using the Floquet exponent.
All Fiber Continuous-Wave Supercontinuum Source for Sensing
Authors: Sun Ting Ting , Zhao Li Long , Pei Shi Xin
Published: March 2013

A broadband supercontinuum source is demonstrated with phosphosilicate-doped Raman fiber laser. By lunching 1495nm continuous-wave pump into a short length of microstructure fiber with high nonlinearity and flat dispersion, high efficiency continuum spanning from 1450nm to 1650nm is generated, covering the whole communication windows. The average output power is as high as 2W when the pump is set as 4.14W, corresponding to a spectral density of 10mW/nm. This all -fiber light source can be applied in fiber sensing system.
The Material Point Method and its Potential Applications in Marine Science
Authors: Zhang Shu Tai , Xue Li Ping , He Shi Jun
Published: March 2013

In this paper, the material point method (MPM) is reviewed. Its theory and advantages over other numerical methods are briefly summarized, and current development status reviewed. Due to the unique features of the MPM, it can be a significant tool in marine science research. Potential applications in marine science are also discussed.
A Condition for the Existence of Period-3 or Period-4 Orbit Solutions in the Lotka–Volterra Difference System
Authors: Sun Xiao Ying , Sun J Fang
Published: March 2013

This paper studies orbital periodic solutions of a Lotka–Volterra difference system. Using a trial method, a condition is obtained for period-3 or period-4 orbital solutions of this system, and we show that the existence of a pair of initial functions of period-3 or period-4 orbital solution implies that they are 3-periodic or 4-periodic.
Modeling and Simulation of Electric Bicycle on the Frontal Crash
Authors: Du Wen Hua , Zhao Hui Wen , Du Cong , Zhang Da Wei
Published: March 2013

Model built for the bicycle, road and the driver and contact established between them is the core technological issue for the study of frame’s deformation and driver’s injury on the electric bike accidents. A rigid model of bicycle, road and obstacle is built by using ADAMS software, and the driver is as Hybrid Ⅲ body collision model by LifeMOD software. Contact between them is established, especially on the driver’s chest to handlebar. Base on the rigid-body collision theory, the collision point of head and the speed of the chest were compared with different speed in the range of 15-35km/h. The simulation results shows that the impact between the rider’s chest and handlebar is the main reason to the difference of rider’s dynamic behave. Simulation results verify the validity of this model and lays fundamentals for the study of driver injury in electric bicycle accidents.
Cable Elements for Numerical Analysis of Highline Cable System of Alongside Replenishment
Authors: Wei Kai , Zhang Liang Xin , Li Nan
Published: March 2013

Various of cable elements are used in the numerical analysis of cable structures. According to the mechanical characteristics of highline cable system of alongside replenishment at sea, two cable elements are investigated: catenary element, which is the exact solution, and parabolic element, which is the approximate solution but simpler to calculate. The equilibrium equations of each cable element are introduced, and the expressions of tangent stiffness matrix are derived. The tangent stiffness matrix of catenary element is calculated through Newton interactive method.
Influence of Strata Pre-Reinforcement on the Tunnel and the Surrounding Strata while Shield Tunnel Crosses Beneath Intercity High-Speed Rail
Authors: Xu Yong Gang , Ji Chang , Zhou Shun Hua , Zhu Huan Le
Published: March 2013

In view of that the construction period of shield crossing beneath high-speed rail is apt to cause soil deformation and large differential settlement of ballastless track plate and of the long-term implications on the tunnel structure of the train cycle dynamic load in operating period, with the project of shield crossing intercity in Suzhou as example, the paper determines pre-reinforcement method before crossing project, applies numerical simulation to analyze the influence of pre-reinforcement on the tunnel itself and surrounding strata, then derives the rule of pre-reinforcement on reducing soil deformation and tunnel internal force. The research gives that grouting in main and secondary reinforcement area will apparently reduce settlement deformation , jet grouting pile controls surface deformation well and soil pre-reinforcement will reduce a lot of shield tunnel segment internal force caused by high-speed rail operation.
Field Measurement and Numerical Simulation of Vibration Effect on Metro Depot Superstructure Caused by Passing Trains
Authors: Wu Yu Bin , Zhang Bin , Liu Ying Hua , Li Xian Hui
Published: March 2013

In recent years, more attention had paid to the vibration and noise influence on nearby building caused by passing trains. The metro depot superstructure is directly built above the train garage, the vibration of superstructure is very serious when the trains get into or go out of the garage. In order to investigate the law of vibration influence on metro depot and superstructure, a field measurement has been carried out and a 3D finite element model of building-platform-column is established. The attenuation law and degree of environmental vibration influence is obtained by analyzing the measurement date and calculation results. The results show that the vibration response of superstructure is obvious, the vibration level is related with the running state of train. The vibration response is more serious when trains pull out of the garage than go into garage, because the running speed is faster when trains pull out of garage. The vibration intensity does not monotonically increase or monotonically reduce with the increasing of floor and it tends to change wave upon wave with the increasing of floor.
Test of Dynamic Strength Characteristics of Lishi Loess
Authors: Wang Nian Qin , Liu Xiao Ling , Han Bo , Liu Bo Tao
Published: March 2013

Lishi loess is an important component of loess slope. To explore the structure and strength change characteristics of Lishi loess caused by shock (vibration) action, and to reveal the mechanism of loess slope catastrophe, the dynamic triaxial test was performed by using equivalent sine wave under strain controlling. The results show that:① There is an obvious stress relaxation phenomenon during the same cyclic loading test, the degree decreases with the increasing of dynamic strain and confining pressure. And the influence of dynamic strain variation on stress relaxation degree is less under high confining pressure than under low confining pressure;② Under a confining pressure of 40kPa, within 1% strain ranges, the needed dynamic stress to reach the specified strain is just 0.01kN, and the peak stress decreases with the augmentation of dynamic strain, when peak stress increases to 0.204kN, the sample is destructed; Under a confining pressure of 90kPa, soil radial particles are closely spaced, within 2% strain ranges also only a dynamic stress of 0.01kN is needed to reach the specified strain, and with the increase of dynamic strain, the samples are destructed when dynamic strain increases to 0.267kN. The dynamic failure stress of Lishi loess increases gradually with the increase of confining pressure, and the linear regression equation is бd=0.0011б3+0.1590, the correlation coefficient is 0.9944. ③According to Mohr-Coulomb failure criterion, the strength parameters of Lishi loess in somewhere of the north of shaanxi are C=30.33kPa，φ=14°. Under the dynamic shearing action, the dynamic effective strength parameters are obviously less than static effective strength parameters, this indicates that the soil consolidation effect reduced and the particles displaced and occluded each other.
Stress Analysis of Closure Process of Continuous Rigid Frame Bridge
Authors: Hao Xian Wu , Duan Rui Fang , Chi De You
Published: March 2013

Theoretical analysis and finite element numerical simulation are done to calculateputing force and displacement under different closure orders of mid-span and side span. Furthermore, stress, horizontal displacement and deflection of bridge structure are analyzed. Closure scheme that construction mid-span firstly, then side span according to calculated launching force is proposed and discussed. Obvious advantage of the new scheme is construction with hanging basket and guiding beam instead of supporting frame. And the measures are simple, safe and reliable.
A Node Localization Algorithm Based on Adaptive Inertia Weight Particle Swarm Optimization
Authors: Wei Ye Hua , Wu Wen Kang
Published: March 2013

Node localization is a key technology of wireless sensor network applications. Considering the resource constraints of senor nodes, node localization is transformed into an unconstrained optimization problem, then one distributed localization algorithm based on particle swarm with adaptive inertia weight is put forward. The unknown nodes construct particle region using the received information of their neighbor anchor nodes, which can reduce the search scope and save the computational cost of the algorithm. Mean deviation of the distances which are the particles to the global optima can be computed to characterize the distribution of particles, and is used to adaptively adjust the inertia weight to avoid falling into the local optima. Simulation shows that the proposed algorithm has a good localization performance.
Distribution Law Detection of Aquifer in the First District of Lu Xin Mine Using TEM
Authors: Zhang Ming , Ning Jian Guo , Tian Cheng Lin , Liu Xue Sheng
Published: March 2013

As the background of hydrological and geological conditions in Lu Xin Mine of Xinwen Mining Group, the transient electromagnetic instrument was used to detect the distribution law of aquifer around the first district. The detection results show that the roof and floor of 13# coal seam and the top of Jurassic are relatively rich in water, but the hydraulic connection between the upper and lower is relatively weak. The roof and floor of 6# and 9# coal seam and the bottom of Neogene are rich in water and the hydraulic connection is strength, and this place is located in the edge of basin which is easy for groundwater to supply.
Experiment Study of Vacuum Material Outgassing Rates
Authors: Sheng Xue Min , Wu Xiao Bin , Feng Yan , Dong Meng , Cheng Yong Jun , Zhang Rui Fang
Published: March 2013

This paper based on an equipment which measure the outgassing of vacuum material,adopt some method, constant volume, otiose flux and double channels and so on, testing the deflation of stainless steel(316、304)brass H62, aluminium2A12, and other representative material deflation.We adopt light eradiate to heat up, and the temperature control range is 23°C~300°C, we study the rule of outgassing rate at different temperature, and use QSM to analyze the component of gas.
Fuzzy Kappa Coefficient with Simulated Comparisons
Authors: Lin Yuan Horng
Published: March 2013

The purpose of this study is to provide a new Kappa coefficient based on fuzzy scoring. This new Kappa is called fuzzy Kappa. Fuzzy theory has been widely used in quantitative research and many researches indicate its positive utility. Moreover, viewpoints of measurement according to fuzzy theory conform to the thinking of human thoughts. Therefore, it is feasible to measure the scoring of decision-making or judgment. In addition, Kappa coefficient is one kind of rater reliability and it is to measure the consistency on judgment among raters. Traditional Kappa coefficient is based on the crisp measurement and it violates the psychological nature of human decision-making. Therefore, in this study, fuzzy Kappa, which is based on the fuzzy measurement, is provided. Besides, data simulation is designed to compare of these two Kappa coefficients. The results show that fuzzy Kappa performs better than traditional Kappa. Based on the findings of this study, some suggestions and recommendations are discussed for future research.
Research of Zero Calibration in Conoscopic Holography Measurement Based on Image
Authors: Ren Shu Yan , Yang Yong Gang , Duan Hai Long
Published: March 2013

Non-contact measurement based on conoscopic holography is a kind of interferometry with common path, so it is not influenced much by other factors such as vibration. But the measurement result is affected by the uniformity of the crystal, which is analyzed in this paper, and corresponding method of adjustment based on image is discussed. And B-splines function is used to calculate zero position in measurement image, which is fitted over the patch image in the neighborhood of gray extreme points of the stripes, which is important to reduce the repeatability error, optimize design, and improve the accuracy of system.
The Approximate Calculation of Atmospheric Path Radiance in close Range and Horizontal Direction
Authors: Chang Song Tao , Zhao Nan , Sun Zhi Yuan , Zhang Yao Yu , Chen Yi
Published: March 2013

Atmospheric path radiance is the key factor in the accuracy of objective radiation measurement. In the traditional radiation character measurements, under the help of the atmospheric observation equipment, MODTRAN and other software likewise, the indeterminacy rate could be around 10~20%, it is highly restricts the measurement accuracy of objective radiation. For this reason, it is quite significant to develop the study of measure and calculation in path radiance. The approximate calculation formula for path radiance in close range and horizontal direction is expressed in this article; it is compared with the results of MODTRAN and measurement in experiment. It is revealed that the accuracy of software is 7.8%, and the formula is 4.9%, which could demonstrate the validity of the approximate calculation formula in close range and horizontal direction. In this article, in the process of deducing and experiment, the validity of the approximate calculation formula in close range and horizontal direction is fully proved, which supply a new method in approximate calculation of path radiance for objective radiation measurement.
Design of On-Line Monitoring System for Grid-Connected Photovoltaic Power Plants
Authors: Zou Xin Jing , Bian Li , Zhai Yong Hui
Published: March 2013

This paper describes the design of an on-line monitoring system for grid-connected photovoltaic plants. The proposed system consists of a meteorological data collection system for measuring meteorological parameters (e.g. irradiance, ambient air temperature, etc.), a set of data collection boxes for measuring electrical parameters (e.g. DC and AC current, DC and AC voltage, DC and AC power, etc.) and a PC. The collected data have been transmitted to the PC by two methods, wired transmission and wireless transmission. The software of the on-line monitoring system based on LabVIEW (Laboratory Virtual Instrument Engineering Workbench) package is used to process, display and store the collected data in the PC disk. The on-line monitoring system was installed in a grid-connected photovoltaic plant for an on-site measurement in Qinghai province in China. The obtained results demonstrate that it has the ability for data collecting, processing and analyzing and it meets the measurement requirements of grid-connected PV plants
Nondestructive Testing in Asphalt Pavements Using Ground Penetrating Radar (GPR)
Authors: Françoso Maria Teresa , Mota Carolina Oyama , Lima Tadeu Rosanti Sugahara Medeiros , Peixoto Creso De Franco
Published: March 2013

This paper presents the results of using the system GPR (Ground Penetrating Radar), as an alternative that uses radio waves at frequencies from 10 to 2500 MHz to get data that enable non-destructive conduct inspections of underground or concrete structures in real time. The research aims to investigate asphalt pavements, analyzing the variations in the responses, which can reveal the presence of pathologies or defects. A case study was made acquiring data, at the State University of Campinas - UNICAMP, in Campinas – SP – Brazil, with antennae 270 and 1600 MHz, in pavements with visible defects of patching and alligator cracks, initially with the dry structure and later, wet. The results were processed in specialized software (Radan 7.0) to generate terrain profiles. The GPR showed effective when there is a change in material employed as in the case of patching, because it was possible to detect layers compromised by intensive request of traffic, the start and end of application of the patching and even deformations in the new layer. In contrast, the alligator cracking did not reach the same result, not presenting accuracy in recognizing the defect. The extent of defect was the only well defined feature in the images.
Screw Loosening Monitoring in UAV Wing Box Based on Phased Array Theory
Authors: Sun Ya Jie , Zhang Yong Hong , Yuan Shen Fang
Published: March 2013

Phased array theory was utilized in the unmanned aerial vehicle (UAV) wing box to identify the screw loosening in the structure. Phased array theory could well control the beam steering of Lamb wave to the desired directions to scan the structure for damage recognition. The time delay in special direction was calculated for the beam steering of the signal. The recognition result was shown on a mapped image.
Research on Evaluation and Detection Method of Print Quality Based on the CCD Information
Authors: Bai Wei Guo , Qiu Chun Li , Zhang Jian
Published: March 2013

This paper introduces the use of self-made CCD camera system for acquiring the information of self-made controller strip on specific areas of a printed page. Through mask equation and the conversion model, established by three-dimensional cube and the matrix methods, whose data comes from the transformation of RGB information to XYZ tristimulus value, we can gain the data to test the quality of the printed materials, such as the characteristic colors’ Lab values, dot gain, print contrast, trapping rates, and comparing with the standard, we can also acquire the tutorial information of the trend towards the adjustment of the ink amount in ink zone or the comprehensive evaluation report of the quality of the printed materials. This method proves as an effective approach to the integrated quality assessment for a full-page detection system, and has a bright future of wide application.
The Design and Implementation of an Information Acquisition System for Building Running Environment Based on Wireless Sensor Network and Loongson2F
Authors: Du Kai Tuo , Zhang Zhen Ya , Cheng Hong Mei , Fang Qian Sheng
Published: March 2013

The process of building environmental information perception can be constructed with wireless sensor network (WSN) expediently. A WSN based information acquisition system for building running environment is described in this paper. The CPU of host computer in the system is Loongson2F and wireless nodes in the system are implemented as Telsob nodes. Because the price of wireless node is low, the hardware cost of the desired system is decreased evidently and the security of the desired system is enhanced because the CPU of the host is native. With those features, the application scenario of the desired system is extended widely. To verify the suitability of the using of Collection Tree Protocol (CTP) in construction of the WSN in the desired information acquisition system, the performance of the CTP based WSN deployed in public building space for environment information acquiring are tested and solutions for some key problems in the construction and the maintenance of the CTP based WSN are given in this paper too.
Tension Measurement of Suspenders on Yulong Bridge with Frequency Method
Authors: Zhu Wei Ming , Zhou Yi Tang , Su He Xian , Lai Zheng Cong
Published: March 2013

This paper describes the tension measurement performed on the suspenders on a self-anchored suspension bridge, Yulong Bridge, on the basis of measuring the natural frequencies of the suspenders in a free-damped vibration and subsequent calculation of the forces using simplified vibrating chord theory. The theoretical background and the practical and economic advantages of this method are discussed, as well as its most relevant limitations.
Automated Extraction of Plant Viral RNA Using the Nucleic Acid Instrument Based on Magnetic Nanobeads
Authors: Dou Yong Jie , Zhao Xiao Li , Xu Jian Sheng , Deng Cong Liang , Nie Leng , Yu Yang , Wang Ming , Song Tao
Published: March 2013

In this paper, an automated nucleic acid extraction instrument based on magnetic nanobeads is described. Also, a prototype is designed and constructed. Some plant viral RNA extraction experiments were done using the platform. And the experimental results demonstrated that the instrument could be successfully used for extraction of plant viral RNA，and the extracted RNA was successfully used in an automated PCR assay for the detection of plant virus. The Ct values of CGMMV RNA, LSV RNA and ArMV RNA at the initial concentration were 12.51, 17.81 and 23.48.
Detection of Pipeline Curvature with FBG Sensors Twisted
Authors: Zhang Yan An , Liu Zheng , Shen Lin Yong , Qian Jin Wu
Published: March 2013

In trenchless detection of underground pipelines, a method has been introduced which employs Fiber Bragg Grating (FBG) sensors to detect curvatures of the pipeline at discrete points and reconstructs the spatial trajectory of the pipeline by means of a newly developed approach. In measuring the pipeline curvature, the FBG sensor may be twisted besides sustaining bending deformation. This paper proposes a new algorithm for curvature calculation at discrete points, considering both overall revolving and partial twisting of the FBG sensors in order to enhance the curve fitting accuracy. Simulation results verify the effectiveness of the method.
Design of Fractured Zone Height Detection System for Mining
Authors: Zhang Li Li , Gao Yuan , Zhou Xue Feng
Published: March 2013

An intelligent control system to measure the developing height of water flowing fractured zone is proposed in this paper. The method of double end sealing water detection is adopted in this system. The hardware design principle, the software programming and the debugging process of the system are illustrated in detail. The control core part of this system is a 32-bit MCU STM32F107VCT6. The other parts consist of intelligent sensors, data collecting circuit, data transmit and storage circuit, electrical valve control circuit and human-machine interface circuit using touch screen. The purpose of this project design is to achieve the detection and analysis of the developing rules of the height of water flowing fractured zone by means of collecting, storage and analysis of the displacement signal, pressure signal, and flow signal in upward holes under the coal mine. This detection method is widely used in safe coal mining owing to its high performance.
Detection of Lead Pollution in Rice Using Hyperspectral Data
Authors: Piao Dong Fan , Zhu Wei Hong , Xu Cheng Zhe
Published: March 2013

This paper presents a new method for detecting lead pollution in rice by using hyperspectral data. First, some transform methods are used to generate relatively independent datasets on hyperspectral data. Then, the kernel discriminant analysis is utilized to extract features from each represented dataset. Finally, new fused features are made by combining aforementioned features serially. The experimental result based on the proposed method shows the good performance in detecting lead pollution in rice.
Uncertainty Evaluations on the Measurement of “Carbon” in the Research on Karst Carbon Sink Effect - A Case for Dissolved Inorganic Carbon
Authors: Du Wen Yue , Yu Jian Guo , Yu Shi
Published: March 2013

In order to set up an evaluation method for the uncertainty in determining dissolved inorganic carbon (DIC) in karst river basin by Non-dispersive Infrared (NDIR) absorption detection technique, the continuous propagation model of uncertainty is used to evaluating the uncertainties from DIC measurement in two typical karst groundwater samples. The main steps are as follows: to fit the calibration curve by means of double-error regression firstly; and then to quantify each uncertainty component in the evaluation process; lastly to obtain the synthetic uncertainty model for DIC determination results. Calculations through experimental results show that: (1) the main sources of measurement uncertainty derive from the sub-uncertainties of calibration solutions, calibration curve fitting and measurements process; (2) the lower the DIC content in groundwater samples, the greater the relative uncertainty of measurement results, and the sub-uncertainty from the fitting of calibration curve gives one major contribution to the total uncertainty.
On Scale Correction Model of Coastline and its Application for Coastline Remote Sensing Monitoring
Authors: Zhang Hua Guo , Li Dong Ling , Shi Ai Qin
Published: March 2013

This paper focuses on the scale correction of coastline extracted from remote sensing images. Measurement of coastline is one of the basic and core work of coastal zone remote sensing monitoring projects. Based on analysis of coastline scale effect and multi-scale simulation of coastline, a scale correction method is presented for remote sensing coastline. This method can be used to correct remote sensing coastline to specified map scale, in order to obtain high-precision remote sensing monitoring results of coastline. The results of application example showed that the absolute error of coastline length is reduced to about one third of the original error after correction using the presented method. So the presented method can increase the accuracy of remote sensing coastline for specified scale substantially.
Effect of Raman Slow Light on Distributed Raman Fiber Sensors
Authors: Li Ning , Wang Da Peng , Yan Ai Mei , Xie Ying Xin , Wang Feng Yu
Published: March 2013

The effects of Raman slow-light on room-temperature single-mode optical fiber sensors are examined by extracting the Raman pulse-delay terms from extended nonlinear Schrodinger equation (NLSE). Numerical study shows that pulse parameters such as pulse position, frequency chirp, and envelope distortion may be greatly affected by slow light. We demonstrate a method based on pump power adjustment for compensating the slow light induced impairment.
Research on Quick Monitoring and Evaluating of Flood Disaster in Poyang Lake Area Based on Remote Sensing
Authors: Sun Qun
Published: March 2013

Flood disaster happens frequently in Poyang Lake area, which causes a huge economic loss each year. In order to prevent and reduce the loss caused by flood disaster, and to promote the economic development in Poyang Lake area, the author has researched methods of quick monitoring and evaluating of flood disaster based on RS and GIS. Firstly, the author discusses the technical means of monitoring and assessment of flood disaster, which includes remote monitoring technology and GIS technology. Secondly, taking Poyang Lake area for example, the author introduces the methods and processes of remote sensing monitoring of flood disaster. Finally, various data of damage has been computed rapidly to achieve the purpose of rapid assessment of the loss by using the function of spatial analysis of GIS and withdrawing flooded areas from the remote sensing monitoring image combined with background data.
Real-Time Monitor Method of Soil Slope Stability in Seasonal Frozen Area
Authors: Jiang Ping , Zhang Meng Su
Published: March 2013

Soil slope in seasonal frozen area subject to rainfall or freezing and thawing cycles, the shear strength of soil damage and lead to landslide hazard. In order to predict the landslide hazard through monitoring the soil slope stability real-time, the soil slope stability evaluation system is established. The Neural Network Algorithm can simulate elastic-plastic finite element method well, and using Genetic Algorithm to search cohesion(c) and internal friction angel(φ) which meet the accuracy requirements. And the intelligent parameter inversion model of soil shear strength (c, φ) based on displacement is established. So, the slope stability can be evaluated real –time based on displacement monitor. Application of this method in actual project shows that this method is accurate and effective.
The Application of GOCI Data Based Remote Sensing Technology in the Field of Sediment Reserch
Authors: Liu Hua Feng , Li Rui Jie , Pan Xi Shan , Mo Lie
Published: March 2013

The application of GOCI data in the research of sediment transportation is introduced in the paper..Compared with traditional ways to verify the simulated results, remote sensing data can contain a huge observation scope and a longer observing time.In. The computed results of water level and suspended sediment concentration were compared with processed GOCI data and had an acceptable result.
The Measurements of Friction Coefficient on Ramps among Different Floor Materials
Authors: Hsu Yao Wen , Li Kai Way
Published: March 2013

This study investigates the influences of slopes on objective friction measurements of different floor materials. It is known that a person is more likely to slip when walking on a slope than when walking on a level surface. In term of the prevention of falls for elders and MMH (manual material handling) workers, slope is more commonly in the design of barrier-free environments. However, it could be a potential environmental risk of slip accidents. The environmental problems were generally caused by poor floor slipperiness. The coefficient of friction (COF) is one of important objective indexes to assess floor slipperiness. It is worthy to investigate that the influences of slope on COF. Thus, COF measurements under different slopes, floor materials and surface conditions were conducted in this study. The data were analyzed to investigate the influence of slope on objective friction measurements of floors. The results showed that the rougher surface and dry conditions had the higher COF values. The different slopes result in significant COF values; however, there is no significant trend. Therefore, there should be more warning signs and slip resistance facilities or accessories to reduce the chance to slip and fall on the slopes.
Surface Warpage Measurement of Wood at Elevated Temperature by Shadow Moiré Method
Authors: Chen Terry Yuan Fang , Chen Yu Sheng
Published: March 2013

A full-field method to measure the surface warpage of wood plate at elevated temperature by phase-shifted shadow moiré method is presented. Test of the method on a cypress wood plate is demonstrated. A comparison of the test results at room temperature to the ones obtained by contact type sensor was made. A good agreement between them is shown. Further measurement of the plate warpage at elevated temperature reveals the warping behavior of wood plate.
Safety Monitoring Information System of Railway Tunnel Construction Based on KNN
Authors: Suo Ning , Wang Hui Lin
Published: March 2013

This paper presents a novel approach for railway tunnel deformation data analysis in Safety Monitoring Information System. The proposed work introduces a nonlinear machine learning method, Kernel Principal Component Analysis (KPCA), and K nearest neighbor classification (KNN) classifier for railway tunnel deformation data analysis. Kernel Principal Component Analysis (KPCA) is first applied to 1-dimension signals derived from a sequence of silhouette images to reduce its dimensionality. Then, we performed K nearest neighbor classification (KNN) for railway tunnel deformation data analysis. The experimental results show the KNN based railway tunnel deformation data analysis algorithm is better than that based on KPCA.
Research on Routing Protocols for Wireless Sensor Network
Authors: Wang Yue Bin , Liu Li Qiang , Yan Quan Feng
Published: March 2013

This paper introduces the architecture of wireless sensor networks, compares several typical routing protocols of wireless sensor network, and focuses on the research of directed diffusion(DD) protocol and geograohic and energy aware routing(GEAR) protocol. GEAR selects the next hop nodes based on the neighbor node location information, limiting the information diffused in the network in the appropriate location of region, which can effectively reduce the maintaining routing information needed for overhead, and form the energy efficient data transmission path, to achieve the purpose of extending the life cycle of the network. Related research work provides the reference for the future network construction.
Optimum Design, Manufacturing and Experiment of a Passive Walking Biped: Effects of Structural Parameters on Efficiency, Stability and Robustness on Uneven Trains
Authors: Sadati S.M. Hadi , Borgheinejad M. , Fooladi H. , Naraghi M. , Ohadi A.R.
Published: March 2013

Passive walkers perform a walking like stable limit cycle on small slopes without any external control. In this research, a deployed model of biped that can be built has been considered, and then its walking performance sensitivity such as efficiency, stability and robustness on uneven trains due to variation of structural parameters and their optimum limits have been investigated. It was shown that the foot arc radius and center of mass height have the most important effect on walking performance. After doing simulations in MSC.ADAMS software, an optimum design trend has been suggested. At the end based on experimental results, it was shown beside optimization of structural parameters, the impact condition is very important to achieve optimal walking.
Design, Modeling and Optimization of a Novel Two DOF Polymeric Electro-Thermal Micro-Actuator
Authors: Sheikhbahaie Reza , Alasty Aria , Salarieh Hassan
Published: March 2013

In this paper, design, simulation and optimization of a novel electrothermally-activated polymeric microactuator capable of generating combination of bidirectional lateral and rotational motions are presented. The composite structure of this actuator is consisted of a symmetric meandered shape silicon skeleton, a SU8 thermal expandable polymer and a thin film chrome layer heater. This actuator is controlled by applying appropriate voltages on its four terminals. With the purpose of dimension optimization, a numerical parametric study is executed. The modeled actuator which is 1560 μm long, 156 μm wide and 30 μm thick, demonstrates a remarkable lateral displacement of 23 μm at power consumption of 38 mW and a considerable rotation of about 7.5° at the same power consumption but with excitation of different terminals.
Explicit Formula for Estimating Aerodynamic Drag on Trains Running in Evacuated Tube Transportation
Authors: Zhang Yao Ping
Published: March 2013

Because of reducing aerodynamic drag, the maglev train could run at a high-speed in the partial vacuum tube. Scientists of some conutries such as U.S., Swiss and China, have started the research work on high-speed tube trains. In this situation, evacuated tube transportation aerodynamics becomes an important theory research aspect, in which the main study content is how to calculate aerodynamic drag. Based on the explicit formula for estimating aerodynamic drag on moving body in an infinite boundary surroundings put up by Isaac Newton, the evacuated tube surroundings is analyzed and the explicit formula with blockage ratio as an independent variable for estimating aerodynamic drag acted on trains running in the evacuated tube which is a finite space is deduced. With the calculation case, compared with the results came out from the explicit formula got in this paper and the results got by Fluent software, it was found that those results are closed. Thus, the explicit formula created in this paper for conveniently estimating aerodynamic drag based on trains running in evacuated tube transportation is credible.
Applications of Multiple Objective Genetic Algorithms in the Optimization Design of Tracked Self-Moving Power’s Layout
Authors: Jin Hai , Xie Jin Fa
Published: March 2013

A multi-objective genetic algorithm is applied into the layout optimization of tracked self-moving power. The layout optimization mathematical model was set up. Then introduced the basic principles of NSGA-Ⅱ, which is a Pareto multi-objective optimization algorithm. Finally, NSGA-Ⅱwas presented to solve the layout problem. The algorithm was proved to be effective by some practical examples. The results showed that the algorithm can spread toward the whole Pareto front, and provide many reasonable solutions once for all.
Predictive Modeling of Turning Operations Using Response Surface Methodology
Authors: Kant Girish , Rao V Vaibhav , Sangwan Kuldip Singh
Published: March 2013

This paper focuses on the development of a predictive model using the measured forces acting on the cutting tool during turning operation of AISI 1045 Steel using a Tungsten Carbide cutting tool insert. On the basis of the experimental results, second order mathematical model is developed in terms of machining parameters by using the Response Surface Methodology (RSM). The results are analyzed statistically and graphically. It has been observed that the predicted values using RSM also follow the same trend as given by the measured values.
Steady Streaming due to a Sphere in Incompressible Fluid
Authors: Sadiq Muhammad Adil
Published: March 2013

In this paper steady streaming due to a sphere has been studied. Instead of using matched asymptotic method we are applying Vishik-Lyusternik method. In this paper we consider the situation when the sphere is at rest and fluid oscillating at infinity. Results have been obtained for Re=O(1) . Effect of Stokes drift is also calculated for the fluid particles.
Investigation on Aerodynamic Drag Reduction of Commercial Truck Based on External Styling of Cab
Authors: Guo Peng , Hu Xing Jun , Zhu Yun Yun , Fu Qiang , Wang Xin Yu , Fan Shi Jie , Fan Qin Yin
Published: March 2013

Aerodynamic drag reduction of commercial truck at high speed is one of the important ways to reduce its energy consumption. CFD simulation and wind tunnel tests are performed on a kind of commercial truck, to study the influence of the cab shape and different kinds of guide cowls on aerodynamic drag, and the impact mechanism was also analyzed. It shows that the cab shape will make great contributions to the aerodynamic drag while the truck travelling, and through improving the shape of cab, guiding the air flow passed, it can effectively reduce the aerodynamic drag and achieve energy saving.
Study and Test Analysis of Engine 1/4 Vibration Model
Authors: Song Hong Ying , Ma Jin Gang , Sheng Peng Cheng
Published: March 2013

Through the bench test, the vibration characteristics of the front right support of the inline four-cylinder diesel engine is analyzed, and the MATLAB simulations and verifications are performed to the differential equation of 1 / 4 vibration model established by using the front right support as the research object. Experimental and simulation results show that the exciting force performs as basic frequency and second frequency and, the acceleration performs as basic frequency and low-frequency at low speed engine vibration; when it is in the high speed vibration, the exciting force is mainly manifested in the second frequency and the acceleration in high-frequency. The motion equation of 1/4 vibration model can reflect the status of the engine vibration well in the second frequency.
GPU-Based Mojette Transform for High-Speed Reconstruction
Authors: Jin Kyung Chan , Kim Hyung Tae
Published: March 2013

Mojette Transform (MOT) is used mainly in imaging implementation of mechatronicbased imaging system to reconstruct a discrete signal from a finite set of projection planes. The MOT uses a specific algorithm, called Corner Based Inversion (CBI), to reconstruct an image from its projections offering high-speed computing properties. Moreover, the MOT ensures a very low complexity in comparison to the reconstruction based on Fast Fourier Transform (FFT). In this paper, Graphic Processing Unit (GPU) based MOT is presented and also CPU and GPU processing are issued from 1283 image pixels. In the result, performance differences between the CPU and GPU architectures are discussed, and an approach of fast improvement in architectural efficiency is recommend.