bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of Gas Emission Quantity Prediction Based on Chaotic Time Series
Authors: Liao Gao Hua , Tang Yu Juan , Dai Fang
Published: September 2013

The gas is one of the most important factors that endanger the security of the mine production. At present, the mine has only realized the real-time monitoring of gas, but not the forcasting of gas.There are some limitation of the traditional forcasting method, such as modeling subjectivism and statistical forcasting. This paper presents the gas emission forecasted method by using chaos time series forecasting,and on this basis to establish time-series forecasting models. The results show that the gas emission system has the chaotic property, using chaotic time series forecasting method to forecast the amount of gas emission is feasible, and the prediction accuracy is improved after improving some parameters algorithms in the chaotic time series prediction algorithm. The contents of this article has laid a theoretical basis for non-contact coal and gas outburst dynamic forecast, but also open up new ideas for in-depth analysis of the gas emission complex.
Experimental Research on Spiral Macrobend Loss of Multimode Fibers
Authors: Ni Ruo Dan , Song Xue , Qian Li Juan , Wang Si Hui , Buryar Ben
Published: September 2013

Spiral macrobend losses of silica multimode fibers were investigated experimentally with LED light source having a central wavelength of 890 nm. It is indicated that the bend loss vary acutely with change of real curvature radius of fiber axis when the latter is less than about 3 cm. The bend loss oscillation phenomenon caused by the whispering-gallery mode has been observed when the real curvature radii are in the range of 1.77-1.87 cm. The real curvature radius and the number of spirals are the main factors affecting bend loss and there is an approximate linear relation between bend loss and the product of the square of real curvature and the number of spirals. The modified forms of the Marcuse formula or the Petermann formula of bend loss by a multiplication factor called as winding circle density, i.e. the number of spirals on unit length of curved part of optical fiber, can fit the experimental data better.
An Improved Hall Vehicle Speed Sensor Detection System
Authors: Qin Zheng Kun , Li Shu Yuan , Wang Chun Wu , Ma Zhong Ping
Published: September 2013

In order to improve the detecting efficiency of the Hall vehicle speed sensor, an improved detection system was presented in this paper. This system was consists of five parts of system manager, A/D converter, D/A converter, voltage comparator, and a high-speed programmable counter array. The quality of Hall vehicle speed sensor online was evaluated, and the statistical result was graphically displayed by PC. Compared with the synchronous detection of digital storage oscilloscope, it is shown that the detecting accuracy of the system can then meet the requirements of industrial production, and will be suitable for mass production.
Optimal Sample Size Allocation for Multi-Level Stress Testing under Progressive Hybrid Interval Censoring
Authors: Yue Hong Bo , Shi Yi Min
Published: September 2013

In this paper, we discuss the optimal allocation problem in a multi-level stress test with progressive hybrid interval censoring and Weibull regression model. We derive the maximum likelihood estimators and their asymptotic variance–covariance matrix through the Fisher information. Four optimality criteria are used to discuss the optimal allocation problem. Finally, an example is provided to illustrate the proposed design.
The Technology Research for the Extraction of Human Eyes Feature
Authors: Ning Hui Ying
Published: September 2013

Using the method which is similar to the eye region selection to compute the length of long axis and the short axis of human eyes, reduce the errors caused by the space between the straight lines in Hough Transform. Using Generalized Hof Transform method to extract eyes perimeter, eliminate the interference of the lights, which is more accurate than using 33 template method. With using the region growing method, set an accumulator to calculate the pixels difference value of the seed points and its 33 neighbourhood (the absolute value of the cumulative numbers of the point is less than the threshold) is the human eye area. With those methods, we can extract the characteristics of human eyes.
Application of Wavelet Denoising Algorithm in Nondestructive Testing Based on LabVIEW
Authors: Yu Yong Fang , Zhang Dao Sheng , Cheng Huan Xin , Cheng Li
Published: September 2013

Nondestructive testing is widely used, the noise signal in echo signal affects defect extraction, so we need to deal with the noise. As a new signal processing tool, wavelet analysis gets people's attention because its good ability to denoise. Wavelet denoising algorithm was applied in this article based on LabVIEW platform, and the denoising of nondestructive testing was realized, the result shows that wavelet denoising algorithm is effective.
Applying Research on Creep Constitutive Model of No.35 Steel Based on BC-BPNN
Authors: Peng Xiang Hua , Li Jie , Jiang Ya Feng , Yu Min
Published: September 2013

The inelastic response constitutive description of metal material under different stress and wide temperature range is very important in many practical engineering. It can accurately reflect the level of material rate sensitivity and set up a simple and practical strengthening evolution rate. Take No.35 steel as an example; because of the action of load, temperature, time and other factors in its forming process, the creep relation is very important and complex. In view of this situation, the BC-BPNN (Based on Back propagation Neural Network), owing high precision nonlinear fitting ability has and good generalization ability, is applied to the research on creep constitutive relationship of 35 steel. At first, the creep relationship is numerically fitted using testing data of 35 steel; then, the fitting results is compared with the creep testing data. The results show that the applying of BC-BPNN to research on metal creep relationship has a strong practical value.
Investigation on Mechanical Properties of 6H-SiC Crystal
Authors: Jin Min , Xu Jia Yue , Chu Yao Qing , Fang Yong Zheng , Shen Hui , Jiang Guo Jian , Wang Zhan Yong
Published: September 2013

In this work, the mechanical properties, such as Vickers microhardnessHv, fracture toughnessKc, yield strengthσvand brittleness indexBi, of <0001> oriented 6H-SiC crystal are systematically evaluated using a microindentation technique under 0.1-2 kg applied load. It is found theHvis decreased as the applied load is increased which is mainly attributed to the effect of indenter penetration. TheHvvalue can be effectively presumed by Kicks law and the Meyers indexnis determined to be 1.73. However, theKcvalue is measured nearly a constant (~0.148 MPa.m1/2) which reveals the toughness of 6H-SiC(0001)crystal is much weaker than those of Si(100)and GaAs(100)crystals. The variation ofσvto the load is similar to that ofHv. The brittleness indexBialso exhibits deceasing tendency as the applied load is added.
Spontaneous Radiation Energy of Current Filaments in GaAs Photoconductive Semiconductor Switches
Authors: Liu Hong , Zheng Li , Yang Hong Jun , Yang Wei , Zheng Yong Lin
Published: September 2013

The spontaneous radiation energy of the current filaments in high gain GaAs photoconductive semiconductor switches (PCSS) is quantificationally analyzed. The spontaneous radiation formula of the current filaments was derived. The concept of the distribution function of the radiation intensity dependent on radiation wavelength was first introduced in GaAs samples. The radiative recombination coefficients of four peak wavelengths were estimated by the statistical-physical method in high gain GaAs PCSS. Calculated according to the radiative recombination coefficient of 890 nm radiation, the spontaneous radiation energies are consistent with the experimental observations. This explains the observations about optical output energy versus filament current.
The Design of Distributed File System Based on HDFS
Authors: Wang Yan Nan , Zhang Shu Dong , Liu Hui
Published: September 2013

HDFS is a distributed file system designed to access large files, which is inefficient for storing small files. For this issue, a new storage architecture based on the HDFS is designed to solve the problem of low efficiency of HDFS storing small files in this article. This paper mainly uses SequenceFile to merge small files and against to the shortcoming that SequenceFile merges small files, the paper provides the solution and designs a new system structure based on HDFS. The system mainly increases the file judgment unit to mark and identify small files, creates a local index file which is helpful to improve the retrieval efficiency of small files to record the size and offset of the small files and finally uses binary serialization to merge the small files, which makes small files be written into large files as time order.
Towards an Entity-Based Scientific Metadata Schema
Authors: Xu Hao
Published: September 2013

During the past fifty years, many metadata schemas have been developed in a variety of disciplines. However, current scientific metadata schemas focus on describing data, but not entities. They are descriptive, but few of them are structural and administrative. SKO Types is an entity-oriented theory for representing and linking Scientific Knowledge Objects by defining entities, relationships between entities, and attributes of each entity in the scientific domain. In SKO management, SKO Types serve as the basis for relating entities, entity components, aggregated entities, relationships and attributes to various tasks, e.g. linked entity, rhetorical structuring, strategic reading, semantic annotating, etc., that users may perform when consulting ubiquitous SKOs. In this paper, we propose an entity-based scientific metadata schema.
Gait Transition of Quadruped Robot Using Time Sequence Control Based on Finite-State Machine
Authors: Liu An , Zhang Xiao Yu , Zhang Kai Ge
Published: September 2013

The adaptability of velocity changing of quadruped robot needs to be realized by gait transition. In this paper, a gait transition method of a quadruped robot based on changing the time sequence was investigated. The swing phase and the stance phase are separated by finite-state machine (FSM), and the locomotion gait involves breaking/enforcing synchronization or changing the order of leg liftoff events, it makes the duration time of liftoff and touchdown events variable. The gait transition from walk to trot is realized by the combination driving of time and event. The experiment is verified by interactive co-simulation among Matlab-Adams. The transition method satisfies the velocity changing of quadruped robot.
Design and Simulation of the Intelligent Control of the Greenhouse Temperature
Authors: Zhao Lin
Published: September 2013

In greenhouse control , The production process of the greenhouse environment has many characteristics, such as time variation, nonlinearity and uncertainty. It's very difficult to build an accurate mathematical model. The effect of the conventional control method is not satisfied. Fuzzy control is used to adjust the parameters of PID control on-line in the aspect of control strategy, accordingly it can make static and dynamic performance index more ideal.
Effects of Different Alloy Composition on Magnetic Properties of Non-Oriented Electrical Steel
Authors: Pei Chang Gui , Bai Pei Kang , Guo Zhang Xia
Published: September 2013

Different alloy composition has a significant effect on the magnetic properties of non-oriented electrical steel . Alloy composition effected recrystallization of product through the effect of hot rolling plate grain size, then effected magnetic properties. Supposing everything other component and process remain equal, the iron loss significantly decreased and magnetic induction deterioration was not obvious with the increase of Manganese element and the grain size increases.
Research on the Key Technology of Automatic Programming System for Line-Contact Processing
Authors: Wang Kun Qi , Yang Bao Chen , Xiong Lei , Liu Le
Published: September 2013

In view of the current situation of line contact efficiency of NC machining without automatic programing system, the automatic programming system for NC machining based on line contact processing is developed. According to the characteristics of line contact processing, the key technologies in the automatic programming system of this paper is studied. After surface modeling, the data of DXF files generated by CAD systems can be read. And the surface processing information is obtained by these data sorted. Through the design of machining process and the sorting of tool path, the tool path of line contact processing is got. Then the research of soft cut of ruled surface is completed, and the graphical automatic programming is realized.
Research on Thermo Effects of Silver Modified by High-Intensity Pulsed Ion Beam
Authors: Wu Di
Published: September 2013

We report a modification method for Silver target by high-intensity pulsed ion beam (HIPIB) irradiation. Based on the temporal and spatial distribution models of the ion beam density detected by Faraday cup in the chamber and the ions accelerating voltage, the energy deposition of the beam ions in Ag is calculated by Monte Carlo method. Taking this time-dependent nonlinear deposited energy as the source term of two-dimensional thermal conduction equation, we obtain the temporal and spatial ablation process of metal Ag during a pulse time. The top-layer silver material in thickness of about 0.33μm is ablated by vaporization and the layer in thickness of 1.6μm is melted after one shot at the ion beam density of 300 A/cm2.
Studies on the Tensile Properties and Flow Performance of the Different Molecular-Weight Polycarbonate
Authors: Gong Hong Ying , Fu Yun Long , Su Xiao Bin , Li Hui Xiao , Wang Si Fan
Published: September 2013

Using the method of blending and two different molecular-weight polycarbonate (PC) particles, a new molecular-weight PC was prepared. Respectively analyzing the tensile property, flow performance and microstructure of three molecular-weight PC.The result shows that the molecular-weight is the main factor what influence the tensile properties and flow performance, the higher molecular-weight, the better mechanical properties, and the poorer flow properties. The tensile property of the new molecular-weight PC is Slightly worse than the original PC, and the flow performance lies somewhere in between.
Study of the Mechanical Properties and Releasing Anion Capacity of Anionic Functional PET Fiber
Authors: Wu Ai Hui , Xu Guo Ping , Luo Guang Hai , Luo Xin Hao
Published: September 2013

In this paper, the polyester chips were crystallized, dried up, grinded into power, mixed with dispersant and anionic powder whose surface has been modified. The conventional properties and capacity of releasing anion for the anionic functional PET fiber were studied. It was found that, as adopted the compound dispersant A+B, the intrinsic viscosity of the PET chips is about 0.72, the dispersibility and the spinnability is good, and the activity of the anionic powder is higher. The breaking strength of the anionic PET fiber decreases from 3.2cN/dtex to 2.6cN/dtex when the content of the anionic functional filler increases from 2 to 4 wt%. However, with increasing the anionic functional filler content, the capacity of releasing anion for the functional PET fiber increases and the number of the negative oxygen ion is 1430 / cm3, which is about two times when the content of anionic functional filler increases from 2 wt% to 4wt%.
Effects of Bcl-2, Bax and P53 Gene Protein Expressions in Gastric Cancer Tissue on the Apoptosis of Cancer Cells
Authors: Zhang Lei , Li Da Peng , Lu Guan Nan
Published: September 2013

Objective: To investigate the expression of p53 gene in gastric cancer tissue and its correlation with bcl-2 and bax protein expression in relationship and discuss the significance of their correlation in clinic. Methods: Pathological specimens from 100 gastric cancer patients with complete medical data and 24 normal lung tissue specimens were selected. Immunohistochemical streptavidin-biotin-peroxidase assay was used to detect the expression of bcl-2, bax and p53 protein. Results: p53 expression was positively correlated with bcl-2 expression (Pearson's R =0.491, P <0.05). The positive expression of p53 was no significantly correlated with bax expression (P> 0.05). The positive rate of p53 expression in the well-differentiated gastric cancer tissues was 17.6%, the positive rate in the differentiated tissues was 90.9%, the positive rate in the poorly differentiated tissues was 72.7%, and There was a significant difference in the expression of p53 in the three tissues (P <0.05). The expression of p53 in the TNM staging showed that the positive rate in stage Iand IIwas 27.3%, the positive rate in stage III and stage IVwas 89.3%, the difference between them was significant (P <0.05). Conclusions: The expression of p53 gene has an obvious clinical significance for the assessment of degree of malignancy and the prognosis of gastric cancer. Bcl-2 and p53 gene expression could jointly promote the development of gastric cancer in a synergistic way by acting on different stages of apoptosis, or bcl-2s participating in p53-induced mitochondria-mediated apoptosis signaling pathways.
Effects of MAPE Modified on Physico-Mechanical Properties of Silvergrass Reinforced High Density Polyethylene Composites
Authors: Yu Wang Wang , Li Cai Hong , Li Juan , Zhang Jian Peng , Wang Chang Wei
Published: September 2013

In this study, silvergrass (SV) reinforced high density polyethylene (HDPE) composites (WPCs) were prepared by injection molding. The effects of maleated polyethylene (MAPE), slivergrass fibers content on the mechanical, Differential scanning calorimeter, morphologies of WPCs were investigated. It was found that the mechanical properties of the SV reinforced HDPE composites can be improved by MAPE treatment. The highest tensile strength and flexural strength of the composites can be reached with 40% and 50% SV contents at the fixed 8% MAPE respectively. The SV can be the nucleating agent with the addition of MAPE. SEM images of tensile fracture surfaces of treated composites demonstrated better fiber-matrix adhesion.
Effect of Ce0.8Sm0.2O1.9 Interlayer on the Electrochemical Performance of LaBaCo2O5+δ Cathode for IT-SOFCs
Authors: Li Rui Feng , He Shou Cheng , Guo Lu Cun
Published: September 2013

The Ce0.8Sm0.2O1.9(SDC) interlayer was prepared by screen-printing method between LaBaCo2O5+δ(LBCO) cathode and 8YSZ electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The effect of SDC interlayer on the electrochemical performance of LBCO cathode was investigated. Experimental results showed that the LBCO cathode with SDC interlayer showed much lower area-specific resistance (ASR) and polarization overpotential than that of LBCO cathode without SDC interlayer at the same test condition, exhibiting the better electrochemical performance. For LBCO cathode with SDC interlayer, the ASR was 0.457 Ωcm2at 800 °C in air, about 36.2 % lower than that of the LBCO cathode without SDC interlayer, and the cathodic overpotential was reduced by 38.0 % at a current density of 0.02 Acm-2at 700 °C in air. The application of a thin-layer SDC interlayer between cathode and dense 8YSZ electrolyte showed great potential in improving the cathode performance for IT-SOFCs.
Adsorption of Chloride Anion by Calcined Mg-Al-Fe Layered Double Hydroxides in Wastewater
Authors: Zhang Wan You , Liu Ying , Xi Li Juan
Published: September 2013

Mg-Al-Fe layered double hydroxides (LDHs) were prepared by coprecipitation method and calcined hydrotalcite (CLDH) was applied to remove chloride anion from wastewater. The influences of calcination temperature, adsorption temperature, adsorption dosage, pH on the removal of chloride have been investigated. The optimum temperature and range of pH were obtained in the experiments and the adsorption capacity reached the highest when the temperature was 30 °C and the pH was 5~11. The residual chloride anion was found to be 2 mg/L with an initial concentration of 100 mg/L. The maximum adsorption capacity was obtained at the LDH calcination temperature of 500 °C. Characterizations of the LDHs were performed using XRD and SEM.
Study on the Preparing of Nanowhite Carbon Black by Silica Fume
Authors: Zhi Xin , Guo Zhan Cheng
Published: September 2013

This research through the study on the properties of silicon dust, put forward in combination with lime kiln tail gas recycling carbon dioxide, preparation of precipitated silica (nanoWhite Carbon Black) of high value utilization technology, and studied and summarized process of the dissolution and precipitation by carbon dioxide. The silica fume is in amorphous form, and it has some special powder properties such as ultra fine grain size and high specific surface area and high chemical activity, these provide favorable foundation for low energy consumption process of recycling the powder. In the dissolution stage, the optimization reaction time is about 40 minutes, this time to complete the process of the reaction more than 90%. And the reaction is the fastest in the first 20 minutes, complete response 75% of the reaction. In the stage of carbonization, with increase of the concentration of the precursor, the particle diameter becomes larger, but the specific surface area of the powder will reduce, the porosity and the surface activity of it will reduce corresponding.
Thermal Degradation of Epoxy Resins Containing Aluminum Compounds
Authors: Yang Yong Li
Published: September 2013

A novel cheap macromolecular intumescent flame retardants (Al-MIFR), was synthesized, and its structure was a caged bicyclic macromolecule containing phosphorus-aluminum characterized by IR. Epoxy resins (EP) were modified with Al-MIFR to get the flame retardant EP, whose flammability and burning behavior were characterized by UL 94, limiting oxygen index (LOI), dilatation, char yield, smoke density rating (SDR) and maximum smoke density (MSD). The epoxy resins were obtained for the UL 94 V-0 rating at low Al contents of 4.0 % get a LOI of 26.8% and char yield of 19.5%. Dilatation, SDR and MSD of EP/Al-MIFR decreased. The degradation behavior of the EP/Al-MIFR was studied by TG and EDX analysis. The experimental results exhibited that the initial decomposition temperature (IDT) was decreased, integral procedure decomposition temperature (IPDT) and amounts of Al and P at the residue were increased.
Application of Dividing Wall Column in Industrial Naphthalene Distillation: A Simulation Study
Authors: Wang Er Qiang
Published: September 2013

In this paper, application of dividing wall column (DWC) to industrial naphthalene was studied. Simulation using Aspen plus software was done to compare the traditional twin furnace and twin column (TFTC) process with new process based on DWC. The results show that, with the same feed parameters, the DWC processes can achieve identical separation effect as the TFTC process with an energy saving of 21.6%, and capital investment and space saving can also be gained. So the simulation results indicate that a DWC would be a beneficial alternative to conventional TFTC configuration for industrial naphthalene distillation.
Characterization of Cold-Sprayed FeAl/WC Nanocomposite Coating
Authors: Wang Hong Tao , Wang Ruo Yu , Chen Xiao , Bai Xiao Bo , Dong Zeng Xiang , Ji Gang Chang
Published: September 2013

A FeAl/WC nanocomposite coating was produced by cold spraying of mechanically alloyed Fe/Al/WC composite powder assisted with annealing treatment. The microstructure and grain size of FeAl/WC nanocomposite coating before and after annealing treatment were characterized. The results indicated that as-sprayed Fe (Al)/WC nanocomposite coating presented a dense microstructure with lamellar structure. The phase transformation from Fe (Al) solid solution to FeAl intermetallics within as-sprayed nanocomposite coating occurred when annealed at 550°C for 25 h. The annealed nanocomposite coating was composed of nanograins of size ranging from 50-100 nm and the grain size of FeAl increased with increasing the annealing time. Moreover, the effect of annealing temperature on the microstructure of the FeAl/WC nanocomposite coating was investigated.
Domestic and International Present Status and Utilization of Hafnium Resource
Authors: Bo Yu , Liu Xiao , Li Yun Gang , Cai Zong Ying
Published: September 2013

Metal hafnium has research significance as a rare metal. Metal hafnium, hafnium alloy and hafnium compounds are made a simple introduction, the distribution of hafnium resource is summarized at home and abroad, and the processing method of hafnium resource and the development prospect of comprehensive performance of hafnium resource are discussed.
Evaluation for the Light Transmission Property of Solar Glass
Authors: Han Yan Gang , Chen Hong Bo
Published: September 2013

Transmittance is the key factor to the quality of solar glass. At present visible light transmittance (380-780 nm) and solar direct transmittance (300-2500 nm) were used to evaluate the light transmission property without considering the specificity of solar glass. In this work a new parameter of effective transmittance in the 380-1200 nm region which was consistent with the spectral response range of solar cells was proposed and calculated to evaluate the property. The value of effective transmittance lies between that of visible light transmittance and solar direct transmittance. Using effective transmittance instead could reflect the performance of solar glass on real applications properly.
Arrangement Characteristics and Wear Distribution of Wire Rope in Parallel Grooved Multi-Layer Winding
Authors: Hu Zhi Hui , Hu Yong , Hu Ji Quan
Published: September 2013

Based on the analysis of multi-layer winding arrangement characteristic of the wire rope in Lebus drum, the experimental study is carried on wear distribution of the wire rope in parallel grooved multi-layer winding. The result shows that, the wire rope is arranged regularly in each drum area in parallel grooved multi-layer winding; the wear of wire ropes in crossover zone is more serious than that of the parallel zone; in the same-layer wire rope winding in crossover zone, the wear damage during the wire rope winding in crossover zone at the end of each-layer drum is the most serious.
Preparation and Properties of Water-Borne Inorganic Zinc-Rich Coating in Hydraulic Engineering Metal Structures
Authors: Liu Lei , Chen Liang , Wang Zai Qin , Li Zhen , Wang Shan Feng , Li Hui
Published: September 2013

Hydraulic engineering metal structures are susceptible to corrosion because of their chronically work in special environment. Water-borne inorganic zinc-rich coatings, owing to their excellent corrosion resistance and environmental performance, are suitable to be used in hydraulic engineering metal structures. In the paper, organic lotion and flaky zinc are used to upgrade the properties through modifying their filler and film. The experimental results show that the water-borne inorganic zinc-rich coatings with flaky zinc as filler and modified potassium silicate as film materials are provided with high durability and good mechanical character.
Mathematical Model for Heat Transfer Simulation of Rotary Alumina Kiln
Authors: Yang Xiao Yan , Xiao You Gang , Lei Xian Ming
Published: September 2013

According to kiln structure and material movement features, considering convective, radioactivity, conductivity and various phase change and chemical reactions, a series of comprehensive models are built for quantifying the thermal fluxes from the gas to the material bed and the heat loss from outer shell to the atmosphere in the rotary alumina kiln. The results show that the temperatures of outer shell accord with test results; the temperature distribution rule of gas is the same with that of materials, but the gas temperatures are higher; it is feasible to use the model to improve alumina kiln performance.
Improvement for Bearing Ring Grinding Process Based on Six Sigma Methods
Authors: Guo Ming Yue , Lou Hong Liang
Published: September 2013

In this paper, six sigma methods were used in bearing ring grinding process improvement. In the improvement, bearing outer ring roundness error was selected as the assessment index, and exsiting problems in grinding process were defined, roundness error of bearing outer ring was measured.One-way analysis of variance was applied to analyze the test results, it indicates that workpiece center height, guide wheel tilt angle and grinding wheel balance are the three main factors that affecting roundness error.According to this analysis, orthogonal experiment was designed. The results show that grinding wheel balance, guide wheel tilt angle and workpiece center height on the impact of roundness error are in descending order. On this basis, a series of measures were carried out to control these three parameters. Uitimately, the grinding process capability index is increased from 0.88 to 1.43, and the target of improvement are achieved.
Multifunctional Non-Woven Carbon Nanopaper: Fabrication, Properties, and Applications
Authors: Gou Ji Hua , Liang Fei , Xu Yun Jun , Mabbott Bob
Published: September 2013

This paper presents a fundamental study of processing, morphologies, properties, and applications of a novel non-woven nanopaper based on carbon nanofibers (CNFs). Unique material formulations were developed to tailor the non-woven nanopaper to specific engineering applications. The non-woven nanopaper was made from a variety of nanomaterials (e.g. carbon nanotubes, carbon nanofibers, graphene, nanoclay, nickel nanostrands, POSS, etc.) with tailored nanostructures by precisely controlling composition, dispersion, functionalization, orientation, porosity, and thickness during the vacuum infiltration, pressure infiltration, or spray/infiltration process. The polymer matrix was impregnated into the stacked nanopapers to form multi-layered laminated composites. Such non-woven nanopaper based composites were designed and fabricated to achieve high energy dissipation capability for vibrational damping, high thermal conductivity and thermal stability for fire retardancy, ultra-high electrical conductivity and current-carrying capacity for lightning strike protection, and electro-actuation of shape memory polymer composites.
The Effects of Temperature on the Stiffness Modulus of Dense Graded Asphalt Mixtures
Authors: Abudullahi Ali Mohamed , Ting Kwong Yiing , Choong Wee Kang , Goh Boon Hoe
Published: September 2013

This study aimed to investigate the effect of temperature on stiffness modulus of asphaltic concrete. The asphaltic concrete mixture were prepared based on Marshall Mix Design method using two different types of bitumen, the 80/100 penetration grade bitumen (80/100 PGB) and Styrene-Butadiene-Styrene (SBS), both with five percent bitumen content. Indirect Tensile Stiffness Modulus (ITSM) test of 1000 N loading was then performed at three different temperatures (25 °C, 30 °C and 40 °C). The results showed that stiffness modulus decreases with increases in temperature for both 80/100 PGB and SBS, which shows the important role of temperature to stiffness modulus of asphaltic concrete. Also, the results showed a higher stiffness modulus for SBS mixtures compare to that of 80/100 PGB mixtures.
WNN Model Based on Particle Swarm Optimization for Fault Diagnosis in Analog Circuit
Authors: Gan Xu Sheng , Cui Hao Lin , Wu Ya Rong
Published: September 2013

In order to diagnose the fault in analog circuit correctly, a Wavelet Neural Network (WNN) method is proposed that uses the Particle Swarm Optimization (PSO) algorithm to optimize the network parameters. For the improvement of convergence rate in WNN based on PSO algorithm, a compressing method in research space is introduced into the traditional PSO algorithm to improve the convergence in WNN training. The simulation shows that the proposed method has a good diagnosis with fast convergence rate for the fault in analog circuit.
Comparison of Two Waveform Design Methods Based on MI and SINR
Authors: Wang Bin , Wang Jin Kuan , Song Xin , Xin Feng Ming
Published: September 2013

Modern radar systems should transmit different waveforms according to different environment. Waveform design is an important problem in radar system design. In this paper, we compare two waveform design methods based on MI and SINR with the signal model of a Gaussian target ensemble in ground clutter. The simulation results show that for the different tasks of radar, the energy allocation modes are different. Finally, the whole paper is summarized.
Control of Robot Manipulators Based on Legendre Orthogonal Neural Network
Authors: Wang Pei Feng
Published: September 2013

In this paper, Legendre orthogonal functions neural network is used to achieve the control of nonlinear systems. The adaptive controller is constructed by using Legendre orthogonal functions neural network. The adaptive learning law of orthogonal neural network is derived to guarantee that the adaptive weight errors and tracking errors are bound by using Lyapunov stability theory. Simulation results are given for a two-link robot, and the control scheme is validated.
Research on Effect of Harmonics to Hysteresis Current Tracking Control Performance
Authors: Zhang Yong Hua , Zhang Jian Sheng , Song Peng Fei
Published: September 2013

A simulation model was built based on the Simulink module in the Matlab to study the effect of DC power harmonics to hysteresis current control performance. The DC power supply in the hysteresis current control circuit was obtained by a three-phase rectifier circuit, and the harmonics of DC power supply vary with the value of the capacitor which was in parallel to the rectifier circuit output. The result of experiment shows that the harmonics cause the inverter output waveform distortion, even cause hysteresis current control tracking failure.
The Control of Burst Point through Layer-Identify when Target is Complex
Authors: Li Jun Feng , Zhang Ya , Liu Heng
Published: September 2013

Control the penetration ammunition burst point through layer-identify, As the target bunkers layer texture is complex ,it may leds to the burst point of ammunition can not in the expected. Such as a soft layer may be ignored by system , or a disturb layer by may be error identificated by system, etc. For those problems, the comparator and the timer is proposed with the combination of hardware system, this system can effectively prevents the layer-identify error, thus burst point can be precise controled. Through the simulation, the system can accurately apply.
A Circular Target Flow Measurement System
Authors: Wang Dong Sheng , Wang Yu Tian , Pan Wei Wei
Published: September 2013

Based on the relation between the wavelength shift of sensing FBG and the strain, a flow measuring device of the circular target binding Fiber Bragg Grating with the cantilever is designed and the mathematical model based on a circular target flow measurement system is established. Through the flow experiment, we can get the flow test result. The experimental data error analysis can be concluded to verify the feasibility and precision of the design.
A Novel Dual-Band Tag Antenna for RFID Application
Authors: Yu Yan Zhong , Yang Hua Nan , Huang Zhong Yi
Published: September 2013

With the rapid development of RFID (radio frequency identification) application, the design requirements of RFID tag antenna are also increasing. A design of dual-frequency or multi-frequency tag antenna has become fashionable. In the present paper, we design a dual-band RFID tag antenna, which consists of a bent microstrip patch and rectangular microstrip patch. The designed antenna is analyzed and optimized by HFSS13. Simulation results indicate that the tag antenna has the characteristics of double band, high gain, and good radiation pattern.
Evaluation of the Uncertainty of Determination Zinc in Cast Aluminum Alloy Ingots by Photoelectric Direct Reading Spectrometry
Authors: Dai Yi Chun , Zou De Shuang , Tian Lun Fu , Shen Ye Qing , Yang Jin Fang
Published: September 2013

According to JJF 1059.1-2012 of Evaluation and Expression of Uncertainty, the uncertainty of determination zinc in cast aluminum alloys ingots samples by photoelectric direct reading spectrometry was evaluated. The uncertainty sources were analyzed and the relevant mathematical models were established. The influential factors of precision were dissected. Each of the standard uncertainty, the combined standard uncertainty, the expanded uncertainty and the confidence interval were anatomized.
Study on the Steering Performance of Dual-Motor Drive Track Bulldozer
Authors: Song Qiang , Zeng Pu
Published: September 2013

The driving theory and the dynamic characteristics of small radius steering, medium radius steering and big radius steering is analyzed, and the simulation model is established under Matlab/Simulink. Then the track bulldozers steering performance of the three sheerings is simulated. The results show that, at different steering modes, the running states of the two sides driving motors are not the same, and the track driving forces of the two sides vary widely. The track driving force is great in the small radius steering model, while small in the medium and big radius steering models. The simulation results lay the foundation for dual-motor drive track bulldozers steering performance matching.
Reliability Analysis of the Electric Hydraulic Power Steering Controller Based on Fault Tree Method
Authors: Wang Hao Li , Shi Guo Biao , Cui Jin Long
Published: September 2013

A fault tree model of the electric hydraulic power steering controller has been built and the minimum cut sets leading to the fault of system has been found out. Then, the method of count reliability prediction is used to get the failure rate of each basic event and the type of failure distribution. We use MATLAB to get the top event probability and the possibility importance and relative importance of each basic event. Lastly, MATLAB, based on Monte Carlo simulation, is used to make the simulation of fault tree model accurate and to calculate reliability index. The accuracy of this method is verified perfectly by calculating. Especially for complex system, this method of reliability analysis is of great significance.
Delay-Partitioning Approach to H∞ Performance Analysis of Discrete-Time Systems with Interval Time-Varying Delay
Authors: Lee Li , Tsai Hsing Jen
Published: September 2013

The paper addresses performance analysis of discrete-time systems with time-varying delay of value bounded in a known interval. A set of sufficient LMI conditions is obtained from using the Jensen inequality to ensure asymptotical stability and-norm bounded by a specified value. The delay partition technique is exploited further to reduce the conservativeness induced by the Jensen inequality treatment. Simulation results show the benefit of the used delay partition approach.
A Conjugate Gradient Optimization Algorithm for Wavy Trajectory of Missile
Authors: Wang Zhi Gang , Zhang Ning
Published: September 2013

Since the traditional parabola trajectory is prone to be head off, wavy trajectory has the flight characteristics of defense penetration ability and increasing range. On the basis of flight characteristics of wavy trajectory missile, a method for flight program angle was designed. A specific formula was given. An optimization model was established. A conjugate gradient optimizing algorithm was used to solve the model and the result is compared with the former trajectory. It shows that optimized wavy trajectory can prove the feasibility of increasing range and valid defense penetration ability.
Ontology-Based Fault Diagnosis Knowledge Representation of CNC Machine Tool
Authors: Shen Bin , Zhao Shu Yu , Wang Jia Hai
Published: September 2013

In order to improve the knowledge representation in the field of CNC machine tool fault diagnosis, a method of knowledge representation based on ontology was proposed. Firstly, the fault diagnosis process in this field were described and analyzed. Secondly, the definitions of ontology such as classes, attributes, relations, and functions were provided, in order to describe the process of knowledge representation based on ontology. At last, the model with OWL of fault diagnosis of CNC lathe was constructed with the protégé. It shows that the method proposed in this article to can improve the description of the CNC machine tool fault diagnosis.
Coevolutionary Algorithm Applied to Skip Reentry Trajectory Optimization Design
Authors: Wang Feng Bo , Dong Chang Hong
Published: September 2013

This paper proposed a coevolutionary algorithm combining improved particle swarm optimization algorithm with differential evolution method and its application was provided. Adaptive position escapable mechanism is introduced in the particle swarm optimization to improve the diversity of population and guarantee to achieve the global optima. The differential algorithm is employed in a cooperative manner to maintain the characteristic of fast convergence speed in the later convergence phase. The coevolutionary algorithm is then applied to skip trajectory optimization design for crew exploration vehicle with low-lift-to-drag and several comparative cases are conducted, Results show that coevolutionary algorithm is quite effective in finding the global optimal solution with great accuracy.
Research on Atmospheric Correction and Surface Reflectance Inversion of UAV (Unmanned Aerial Vehicle) Remote Sensing Data
Authors: Jia Zhi Le , Lu Xiao Ping , Zheng Feng Jie , Zang Wen Qan , Liu Qing Chen
Published: September 2013

Through atmospheric correction of UAV remote sensing images, inversion to obtain surface reflectance, typical objects with measured experimental area water, vegetation and bare soil area reflectance comparative analysis, the experimental results prove the feasibility of using UVA to carry out the quantitative remote sensing research, and its advantages.
Nonlinear Image Mosaic of Pipe Inner Surface
Authors: Bao Jun Wei , Chen Qiang , Peng Fu Qiang
Published: September 2013

The present study is concerned about image mosaic in single reflector panoramic imaging system (SRPIS). A nonlinear image mosaic algorithm is proposed to get the panoramic image of pipe inner surface. Because of nonlinear distortion in the images which are unwrapped from the original images, its practically impossible for traditional image mosaic method based on 2D planar projective transformation to eliminate phenomenon of ghost and blur in the seam. Nonlinear image mosaic algorithm is performed by projecting many pieces of image divided from right image onto the left image. The position-variant parameters of transformation model are got by quadratic interpolation. The results show that nonlinear image mosaic algorithm overcomes the limitations of traditional image mosaic method in images with distortion and the mosaic image is clearer than that by traditional image mosaic method.
Informed Tectonics in Digital Design Based on GEP
Authors: Su Ke
Published: September 2013

Digital design has resulted in the need for a reconfigurable of current design theories. The present research postulates the oretical framework of informed tectonics in digital design. The research for the evolution algorithmgene expression programming is developed and discussed. This paper mainly talk about the oretical framework of informed tectonics in digital design based on evolution algorithmGEP. The methodologies is used to explain and guide future research anddevelopment.
Study on Effect of Shipborne Missile Launch Position Based on Fast Fourier Transform
Authors: Zhong Zhou , Jiang Yi , Zhang Chong , Li Yong Yuan
Published: September 2013

In allusion to the problem of launching precision, it carried on the research of the effect of shipborne missile launch position based on the spectrum analysis technology. A rigid-flexible coupling integrative model of ship movement and missile launch was built by use of virtual prototype technology. Simulation analyses on a variety of conditions were automatic conducted by launch time parameterized scripting language, and missile muzzle attitude parameters of different launch position were gained. By using of spectrum analysis which is based on FFT, the missile dynamic responsive was analyzed, and the relationship between launch position and accuracy was established. Then the position of the weapon system can be designed according to the specific motion characteristics of ship. The research result is also constructive to the selecting of suitable launch position.
Removal Method of Baseline Drift from ECG Signals Based on Morphology Filter
Authors: Pang Yu , Deng Lu , Lin Jin Zhao , Li Zhang Yong , Li Guo Quan , Zhou Qian Neng
Published: September 2013

Baseline drift is the main noise of ECG signals which affects the detection accuracy so its removal plays a significantrole in the ECG signal preprocessing. Complex calculation and non-optimal signal processing cause problems of ineffective results and low real-time effects in traditional methods. This paper designs a new filter to remove baseline drift based on the theory of mathematical morphology, which is created by the geometric parameters of the ECG signal. Experiments show that the method can effectively remove the noise of baseline drift by simple computation and is helpful to improve the detection accuracy.
Head Detection by the Adaboost Algorithm for Head Pose Estimation
Authors: Liu Xiang Yang , Zhu Shao Song , Wu Su Qing , Shen Zhi Wei
Published: September 2013

For human head pose analysis based on videos, pose is usually estimated on the head patch provided by a tracking module. However, head tracking is very sensitive to the large changes of pose. Therefore, this work locates the head patch in the videos by head detection. Firstly, we use the Adaboost algorithm to detect the human head in the video. Secondly, we present a dimensionality reduction method to process the head patch. Finally, we use the nearest neighbor method to estimate the head pose. The experiment results show: accurate head detecting helps to estimate the head pose. This method can be used for complex conditions of accurate head pose estimation.
Analysis on the Performance of Anti-Narrowband Interference of GNSS Receiver in Time Domain
Authors: Yu Xiao Hu , Huang Yang Bo , Mou Wei Hua
Published: September 2013

Starting from the actual demand for eliminating narrowband interference signals common in GNSS receiver, this brief has described basic principles of adaptive filter first based on LMS algorithm, and then analyzed the performance of anti-narrowband interference receiver with bilateral interpolation filter based on above principles. Finally, simulation results shows that compared with that without interference suppression processing, when JSR is 35dB, the Eb/N0 can improve by 5dB by this method; and when compared with theoretical values without interference, the Eb/N0 deteriorates by 1dB. With the increase of interference strength, the interference suppression effect by this method is more significant.
The Application of Grey Prediction on the Fast Control Power Supply in EAST
Authors: Huang Hai Hong , Miao Jia , Wang Hai Xin , Wang Feng Feng
Published: September 2013

Based on the grey theory, a novel model is built to predict the input signal of fast control power supply used in Experimental Advanced Superconducting Tokamak (EAST). The model can be used as online metabolic grey filtering and one-step prediction of different input signals. Results of simulation and experiment show that the predicting algorithm based on the grey system model can predict the input signal primarily.