bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Thermogravimetry Data of Cooking Oil Tar Based on Adaptive Wavelet Analysis
Authors: Xie Zheng Wen
Published: September 2013

Test of the combustion characteristics of cooking oil tar in pipe was conducted. Wavelet transform was introduced to the thermogravimetric data smoothing and differentiation analysis according to the experiment results, and the orthogonal test method was used to find the optimize wavelet parameter. Wavelet transform results were compared to the traditional Moving average,Gaussian Smoothing and Vondrak smoothing methods and it was proved that the signal-to-noise ratio () of the measurement is increased significantly. The kinetic parameters calculated from the original TG curves and smoothed DTG curves have excellent agreement,and thus the wavelet transform smoothing algorithms can be used directly and accurately in kinetic analysis.
Research on Virtual Simulation Technique Based on Shader
Authors: Cui Qing Chun , Li Xing Xin , Hao Jian Ping
Published: September 2013

Shader plays an important role in DirectX11, and whatever things are rendered by Shader. It is great significance to study virtual simulation technique based on Shader. Firstly, the common shader core is introduced by this paper. Secondly, the virtual simulation system architecture based on shader is studied. Finally, a virtual simulation system is implemented based on DirectX11 in VS2010, and achieves better results.
Study of InSAS Interferogram Filtering Based on Lattice Boltzmann Method
Authors: Song Chao Shuai , Yue Jun , Gao Hong Xiu
Published: September 2013

On the issue of interferogram filter in Interferomatric Synthetic Aperture Sonar(InSAS), P - M model based on partial differential equation (PDE) can not only remove noise effectively, but also better keep the interferogram details and edge information. But its computation efficiency is relatively low and it can not be parallelized to real-time processing. Aiming to overcome these shortcomings, a de-noising method based on lattice Boltzmann method(LBM) is introduced. Processing results of the simulation and real experimental data show that the interferogram filtering method based on LBM can de-noise more effectively, and its calculation efficiency is better. In view of it, LBM can be used for real-time processing.
Hardware Circuit Design for Direct-Coupled SVG
Authors: Dai Xian Bin , Yin Jian , Du Wei
Published: September 2013

First designed the SVG has based on direct-coupled, rated capacity 200kVar, rated voltage of 10kV. Elaborate the system configuration of the main circuit, the selection method of the inverter, the diode rectifying devices DC side capacitor and other devices, and control method. Then carry out MATLAB simulation on the designed SVG to verify the correctness of the direct-coupled SVG hardware circuit; when the load changes, SVG can quickly convert operating mode, compensate reactive current.
Study of System Modeling and Simulation Based on Mixed Domain for Analog-Digital Mixed SoC
Authors: Deng Jun , Zhou Liang , Huang Xiao Zong , Huang Xu , Li Yu Jing , Liu Lin Tao , Tao Yi
Published: September 2013

The design of digital-analog mixed SoC involves RF/analog and digital domains, how to effectively improve the design reliability and to reduce the development cycles has become a research hotspot. This paper establishes the appropriate behavioral models of RF / analog / digital IP modules, and carries out the behavioral simulation based on the built mixed-domain simulation platform and the behavioral libraries of RF/analog/digital IP module, which enhances the reliability and stability of mixed SoC design, and reduces the design cycle. Those explorations may be helpful to the designers of digital-analog mixed SoC.
Design and Development of EOS/MODIS Satellite Data Automatic Download Robot
Authors: Cao Dan Yang , Xu Kang Ning , Wang Zhi Yan , Ma Ji Wu
Published: September 2013

With the development and advancement of technology, remote sensing data of MODIS satellite become more precise, loved and applied by relevant researchers widely. This software enables remote sensing data of EOS/MODIS satellite's automated ordering and address of FTP resource's accessing, providing convenience for users. Currently, the software with stable and reliable performance, is robust, fully automated, and can provide services to all kinds of users of remote sensing data of MODIS satellite.
The Development of Special CNC System for Profiling Lathe Based on Digital Capture Measurement
Authors: Wang Ping Jiang , Wu Yang , Qi Jiang Fei , Chen Ji Hong , Xiang Hua
Published: September 2013

Aimed at the goal of digital capture function for CNC profiling lathe, it has conducted researches on the key technologies of CNC system development, including automatic profiling measurement, profiling data collection methods and G-code program automatically generation. Before process, use an on-off-type laser sensor along the planned path close to the sample workpiece point by point to get series of coordinate points of the contour through the CNC system position latch function and the switch of senors state; through subsequent processing methods: contour segmentation, curve filtering, etc. And generate the G-code program for process. Practice shows that this special CNC system for profiling lathe, not only integrates automatic profiling data acquisition, automatic generation of process G code program, and has the characteristics of simple structure, easy operation and high efficiency.
Structural and Tribological Properties of MoS2/Polyimide Composites Exposed to Atomic Oxygen Environment
Authors: Wang Xiang Li
Published: September 2013

Effects of atomic oxygen (AO) irradiation on the structural and tribological behaviors of MoS2filled polyimide (PI) composites were studied by using ball-on-disc tribometer, infrared spectra, X-ray photoelectron spectroscopy and scanning electron microscopy. It was found that the irradiation of AO induced the destruction of polymer molecular structures and formation of volatile products which induced the change of the structure, morphology and tribological properties of samples. The addition of MoS2filler significantly increased the AO resistance of PI composites due to the formation of MoO3-rich skin layers during AO process. The addition of MoS2improved the tribological properties of PI before and after AO irradiation.
Research on Microstructure Evolution Laws of Ultrafine Grained Metastable Automobile Steel
Authors: Li Ji Guang , Huang Hai Liang , Zeng Shang Wu , Cao Jia Li , Wang Tie Jun
Published: September 2013

The microstructure evolution laws of ultrafine grained metastable automobile steels was studied in this paper by laser confocal scanning microscope, EBSD, XRD and TEM. Results showed that, the matrix organizations of hot-rolled steel were lath martensite and deformation ferrite, and there were a little of retained austenite film and lath between the lath martensite. After heat treatment, the matrix organizations of steel were ultrafine ferrite and retained austenite. The retained austenite transformed into martensite and ε-martensitic in the deformation process, and the strength and plasticity of steel were improved. A lot of retained austenite were obtained in the annealing process. The TRIP effects by the large fraction of metastable austenite and the ultrafine grain size add to the test steel with high strength and high plasticity.
A New Direct Algorithm for Pole-Placement by State-Derivative Feedback for Single-Input Linear Systems
Authors: Gao Zun Hai
Published: September 2013

The generalized Wonham controllable canonical form in single-input systems is presented and applied to pole placement of state derivative feedback. A new direct algorithm is proposed. The advantage of this algorithm is no need to compute the characteristic polynomial of the system. The theory and approach are introduced, and the general expression is obtained for the derivative feedback gain matrix of the single-input system.
The Urban Road Short-Term Traffic Flow Prediction Research
Authors: Qin Zhen Hai
Published: September 2013

To predict the future traffic flow status more accurately is of great significance to alleviate urban traffic congestion for a short period of time and avoid the waste of social resources. At first, this paper summarizes the characteristics of urban expressway traffic flow. Then establishes BP neural network short-term traffic flow evaluation model based on MATLAB, and finally through the instance, verify the validity of the model.
Cause Analysis of the Various Shapes of Leaves and Estimate the Actual Weight of the Leaves
Authors: Sun Wen Hua , Liu Jiang Hua , Ni Xiao Long , Fan Wen Fang
Published: September 2013

The most attractive secret of the leaves is why they have the various shapes and the weight of the leaves. Based on the theory of gene and ecological environment, a model is built in this paper to explore it. The result can be extended to predict the weight of any parts of the tree and adapted for great majority kinds of trees.
Fabrication of Diamond-Structure Alumina Photonic Crystal with Rectangle Cavity Defect and its Microwave Properties
Authors: Chen Shi Bin , Yao Yun Shi , Wang Rui Long
Published: September 2013

A diamond-structure alumina photonic crystal with a rectangle cavity defect has been fabricated combining stereolithography (SL) and gel-casting. In transmission spectra a resonance peak of transmission of 70% is observed in the band gap of 10.48Ghz-12.21Ghz, by comparing with the measured result of the perfect structure and theoretical calculations. Experimental results showed that the peak of photonic band gap was caused by the rectangle cavity defect of the diamond structural photonic crystal. The method provides us with a novel approach to fabricate ceramic microwave photonic crystals with point defect.
Identification and Monitoring Strategy of Macrophomina phaseolina from Imported Soybeans
Authors: Sun Juan , Chen Shun Sheng , Yu Cui , Yang Cui Yun
Published: September 2013

The isolate MP-63280 was isolated from imported soybean in Shanghai port by traditional PDA method. The isolate grew fast, produced typical black microsclerotia. Universal primers and special primers were used to amplify and sequence from MP-63280. Compared with the identity of rDNA sequence of Macrophomina phaseolina from NCBI GenBank databases by blast method, the result showed that its homology was up to 99%. Pathogenicity tests showed that soybean, cotton and sweet potato were infected by MP-63280. Based on morphological characteristics, molecular and pathogenicity test results, the isolate was identified as Macrophomina phaseolina (Tassi) goid. The effective methods to prevent the fungi from spread and transimission are to strengthen inspection and quarantine.
The Influence of Sintering Temperature on the Mechanical Properties and Microstructure of Carbon Nanotubes/Zirconia/Hydroxyapatite Biocomposites
Authors: Li Ai Min , Sun Kang Ning , Fan Run Hua
Published: September 2013

Carbon nanotubes/zirconia/hydroxyapatite biocomposites was prepared by hot-pressing sintering under Ar atmosphere. The influence of sintering temperature on the mechanical properties and microstructure of carbon nanotube/zirconia/hydroxyapatite biocomposites was studied. We tested the bending strength and fracture toughness by universal electronic materials testing machine. The component of the composites was tested by XRD. The fracture surface of the composites was observed by SEM. The results indicate that the bending strength and fracture toughness of the composites is lower when the sintering temperature is lower than 1200°C. The difference of bending strength and fracture toughness at 1200°C and 1300°C is little. The number of them has risen markedly than the low temperature which reached to189.2MPa and 1.8MPa·m-1/2 respectively. The composition of the composites is mainly of hydroxyapatite, zirconia, carbon nanotubes, and a small amount of calcium phosphate, which indicated that part of the hydroxyapatite has decomposed. SEM photographs show that the fracture surface of the composites sintered at 1200 °C and 1300 °C is ductile fracture status and has bigger density.
Luminescent Properties of LiTaO3:Tm3+, Yb3+ Phosphors Prepared by Ball Milling Method
Authors: Wang Xin Ze , Liu Zhong Xin , Gao Hong Jian , Jing Yani , Li Chang Lin , Liu Jing
Published: September 2013

LiTaO3: Tm3+, Yb3+powders were synthesized by a high-energy ball-milling (HEB) method compared with the conventional solid-state reaction (SSR) method. Under the excitation of 980 nm laser, the strong blue emission (477 nm) band is observed and attributed to1G4-3H6of Tm3+. Because of it causing high local temperature and narrow particles size, increasing the contact area between the particles and improved crystallinity of the host, synthesis by high-energy ball milling show higher photoluminescence (PL) intensity compared to the solid state reaction method. In the process of mechanical milling, Tm3+, Yb3+co-doped LiTaO3phosphors with high photoluminescence property could be achieved at a relatively low reaction temperature.
The Synthesis of Cadmium Sulfide and Cadmium Selenide Nanostructures
Authors: Zhang Ya Hui , Cheng Xi , Wang Qing
Published: September 2013

Cadmium sulfide and cadmium selenide have been the subject of considerable interest because of their potentialapplications in many fields. In this paper, the synthesis of cadmium sulfide and cadmium selenide nanostructures is described. The Morphologies of as prepared cadmium sulfide and cadmium selenide nanostructures are summarized. And the applications and prospects of cadmium sulfide and cadmium selenide in this field also are analyzed.
Research of the Reactivity Photoacoustic Characteristics of PETN and HNS Induced by Laser
Authors: Wang Hui E , Zhang Wei , Shen Rui Qi , Ye Ying Hua , Wu Li Zhi
Published: September 2013

The reactivity photoacoustic technology was used to detect the laser induced photoacoustic spectroscopy characteristics of explosives (PETN and HNS). The results showed that: the reflectivity of pure PETN and HNS under laser irradiation was large and the photoacoustic signal was weak. After doping with carbon nanotubes (CNTs) and carbon black (CB), the reflectivity decreased. The photothermal conversion and the optical absorption coefficient rate increased and the photoacoustic signal enhanced. For the same sample, the intensity of the signal was proportional to the incident laser energy. For the same explosives and under the same doping amount, the photoacoustic signal of the CNTs doped sample is greater than that of the CB doped sample. For the same sample and the same dopant, the greater the amount of doping, the stronger the photoacoustic signal. There was optimum ignition energy. By using TG-DSC technology for thermal analysis of the samples, the results from the thermal analysis could explain the reactivity photoacoustic experiment.
The Phase Change Study of High Titanium Slag during Heat Treatment
Authors: Wan Shu Quan , Liu Chun Hai , Lan De Jun , Han Hong Bo , Hou Hai Jun
Published: September 2013

The phases of high titanium slag were studied by using XRD and XRF. XRF results show that high titanium slag mainly contains the elements, Ti, Fe, Si, Mn, Al, Ca, P, Zr, Mg, Ba, S, K and etc. XRD results show that the main phases of original high titanium slag are some complex solid solutions, such as (Fe0.33Ti0.46Mg0.21)(Ti1.9Mg0.1)O5, Fe2TiO5, Fe3Ti3O10 and etc, and it also contains a spot of rutile (TiO2). After heat treatment for 10h at 1073K in atmospheric ambient, the main phases have been mostly changed to rutile, with an obviously weight gain about 2.9%. It may be caused by the reaction of high titanium slag with oxygen during heat treatment, and that may be conducive to better quality of the high titanium slag and titanium dioxide.
Synthesis and Characterization of Thermoplastic Poly (ether-imide) Elastormer Based on Di-(4-Aminopheny)Methane-Pyromellitimide Unit
Authors: Shang Jiao Jiao , Lei Ming , Lin Shao Jian , Lan Jian Wu , Huang Xia , He Wen
Published: September 2013

Novel polymers with imide and ether were synthesized by pyromellitic dianhydride and Pyromellitic dianhydride (PMDA), 4,4'-metylenedianiline (MDA), amino-teminated polyoxypropylene (D2000). The structures and thermostability of polymer were characterized through FT-IR spectra, thermogravimetric analysis (TGA) and differental scanning calorimetry (DSC), solubility behavior was determined via seven solvents. The results indicate that these polymers have good chemical resistance and exhibit excellent thermostability owing to the introduction of imide units.
Preparation and Characterization of Phloroglucinol-Resorcinol-Formaldehyde Carbon Aerogels
Authors: Liu Xuan , Liu Zhen Fa , Fu Hao Lin , He Rui , Zhang Li Hui
Published: September 2013

Phloroglucinol-resorcinol-formaldehyde organic aerogels (PRF) were prepared using phloroglucinol, resorcinol and formaldehyde in a sol-gel process, solvent replacement and drying at room temperature. The phloroglucinol-resorcinol-formaldehyde carbon aerogels (CPRF) were prepared by charring the PRF at high temperature under the aegis of helium flow. The microstructure of CPRF was characterized by infrared spectroscopy, specific surface area analyzer and scanning electron microscopy. The results showed that the CPRF had continuous network structure and high specific surface area.
Synthesis and Polymerization Kinetics of PMMA in Imidazolium Ionic Liquids
Authors: Wang Pei , Liu Yuan , Su Wen , Liu Lian
Published: September 2013

Polymerization of high molecular weight PMMA was achieved in [BMIM]PF4at reaction temperature 60oC, 65°C and 70 °C, reaction time 60min. The data including the yield, molecular weight and molecular weight distribution of PMMA were analysized. The results showed that the weight average molecular weight of PMMA in [BMIM]PF4is up to 275867, respectively 4 and 7 times of molecular weight in cyclohexane and toluene. Secondly, the polymerization kinetics of PMMA in [BMIM]PF4were tested, the apparent chain propagation rate constant of PMMA are 0.93×104,1.11 ×104and 14.1×104in 60 °C, 65°C and 70 °C. Compared with the growth rate constant in toluene, the polymerization rate constant PMMA in the ionic liquid increased by 4~7 times.
Preparation of FePO4•2H2O with Flower-like Microstructure by a Facile Hydrothermal Synthesis Method
Authors: Jiang Bing , Wang Wen Qin , Liu Yu Song , Guo Zhi Meng
Published: September 2013

FePO4·2H2O with orthorhombic flower-like microstructure was synthesized by a facile hydrothermal process which was of low-cost and easy processing in large area. The formation mechanism of the flower-like FePO4·2H2O was discussed in details by investigating the different concentration of reactants and reaction time. The results show that the morphology of FePO4·2H2O changed from microsphere to flower-like structure, which possess an unique morphology with six petals and the angle of each petal being 60o. The formation mechanism of FePO4·2H2O flowers can be explained by the dissolution-recrystallization and crystal splitting.
Processing on Red Mud by Integrated Dealkalized Sintering with Magnetization
Authors: Fang Yong Guang , Qian Yu
Published: September 2013

Integrated sintering between magnetization and dealkalization, processed on red mud firstly. DWS-50 was used to detect the rate of dealkalization, and phase transition of elemental iron in red mud was analyzed by XRD. By effect of sintering temperature and sintering time on red mud, the results showed that integrated sintering on red mud between dealkalization and magnetization was feasible.
An Experimental Study on Fracture Conductivity Influenced by Sulfur Deposition
Authors: Fu Ying Kun , Li Zhi Ping , Lai Feng Peng , Yang Bao Song , Meng Chao
Published: September 2013

Deposition of solid elemental sulfur may arouse severe damage to the formation and significantly affect the gas deliverability in sour gas reservoirs. As one main measure of stimulation, hydraulic fracturing always ceases to work due to the sulfur deposition in the fractures. To have a better understanding of the failure of fracture conductivity caused by sulfur deposition and learn the degree of fracture conductivity improved by acidification, an experimental was implemented and studied. In this paper, both the sulfur powder and an artificial fractured core were employed to simulate the process of sulfur deposition in the fractures. A further step was made to inject some hydrochloric acid into the blocked fracture caused by sulfur powder. The result showed that the fracture conductivity could be greatly reduced by the sulfur deposition. The fracture conductivity can be decreased by 17%~47% due to sulfur deposition. However, to some degree, acid-fracturing can improve the conductivity of fracture by eroding the surface of fracture. This means the failure of fracture blocked by sulfur deposition can be improved by acidification.
The Performance Evaluation of Solid Free Completion Fluid
Authors: Liu Qing Wang , Zhang Shou Song , Fan Zhen Zhong , Wang Ji Gang , Lou Yan Min
Published: September 2013

The solid free completion fluid is the KCl-polymer system, it has the good inhibitory and stabilize the clay. The corrosion rate is 0.0775 g/m2·h, for different permeability core, the degree of injury is less than 20%.Use completion fluid to reduce oil layer damage of main mechanism for the effect of k+, inhibition of polymer and the synergy of K + and polymer.
Study on TiO2/Tourmaline Composite Photocatalyst Materials
Authors: Feng Yan Wen
Published: September 2013

TiO2/tourmaline composite photocatalyst materials were fabricated mainly by the sol-gel technique. Study found that, TiO2/tourmaline composite photocatalyst materials, under the bombardment by electron beam in SEM, would turn to be brighter and attract each other, and the electrostatic gravitation among the TiO2/tourmaline composite photocatalyst materials granules grow up evidently on their surfaces with the accumulations of electron from the electron probe, so as to be strong enough to force the TiO2/tourmaline composite photocatalyst materials granules to be shifted rapidly and accumulated into clusters ultimately, and the granules which were heat treatment on 600°C for 3h shifted most strongly. And the average absorption rate of TiO2/tourmaline composite photocatalyst material was stronger than nano-TiO2, in the visible region of wavelength 400-500nm. In addition, TiO2/tourmaline composite photocatalyst materials were capable of activating water molecules to reduce agglomeration of water molecules, and to increase the amount of dissolved oxygen in the Photocatalytic reaction system.
Investigating the Use of Nanoscale Bilayers Assembly on Stainless Steel Plate for Surface Hydrophobic Modification and Condensation
Authors: Wu Shen Chun , Wang Dawn , Lin Sin Jie , Chung Chen Yu , Chen Yau Ming
Published: September 2013

This study investigated the use of nanoscale bilayers assembly for hydrophobic surface modification on stainless steel plate and its effect on condensation. This study first performed nanoscale bilayers assembly method, with the addition of a fluorosilane treatment using chemical vapor deposition (CVD), to modify the surface structure and thereby the wettability of the surface at 15, 20, and 30 bilayers. Experimental results showed 15 bilayers to be the optimal number of bilayers among the samples tested, resulting in the largest contact angle of 150° (compared to 70° on unmodified surface), corresponding to the highest surface hydrophilicity; however, beyond 15 bilayers there seems to be no significant changes or improvements to hydrophobicity. Visualization of the condensation process also indicated later formation of film condensation on superhydrophobic (15 bilayers) surface, and by tilting the condensation surfaces at 90°, the self-cleaning property of the superhydrophobic surface allows water droplets to roll off the surface due to gravity before formation of film condensation, while large water droplets still remain stuck on unmodified surface. Therefore, by allowing the condensation process on the superhydrophobic surface to continuously cycle back to droplet condensation, there is great potential for condensation enhancement on superhydrophobically modified surface.
Research on Coating Techniques of Locomotive Spring
Authors: Xie Ya , Sun Cheng
Published: September 2013

This article is based on the analysis of locomotive springs packaging existing situation, combining with spring packaging requirements, giving a spring packaging technology program. The program is by using 0.6mm PE shrink film on the new U type coating machine to achieve reel wrapping package for locomotives inner and outer springs respectively, and then passing the BM-500 thermostatic shrink packaging machine to complete coating process technical solutions .In addition this paper gives a detailed description for the new U type coating machine structure design and working principle to make early program planning for the locomotive springs packaging production line.
Forward Slip and Backward Slip in Radial Ring Rolling Process
Authors: Liu Yan , Wang Qiang , Cai Dong Mei
Published: September 2013

During the process of radial ring rolling, relative slip or relative slip tendency occurs on the interface between the ring and the rolls. Research on the relative slip or relative slip tendency plays an important role on reducing friction to ensure the ring rolling smoothly. In this paper, the reason of relative slip or relative slip tendency is investigated that there is speed difference between tangential component of the ring and linear velocity of the rolls. According to speed difference, slip types of the interface are classified. Forward slip coefficient and backward slip coefficient are defined and derived and relations between them are studied. Comparison between the new method and the previous one is conducted via case study, which proves the rationality and effectiveness.
Energy Loss on High-Temperature Plasma Processing Waste Printed Circuit Boards
Authors: Wang Song Bai , Cheng Chang Ming , Lan Wei , Zhou Ren Wu , Zhang Xian Hui , Liu Dong Ping , Yang Size
Published: September 2013

This paper estimates the electrical energy loss on high-temperature plasma processing waste printed circuit boards. Using three plasma torch powers in big output power (60W) and a plasma torch power in relatively small output power (30W), after 4.5 hours of high-temperature plasma incineration, 43 kilograms of waste printed circuit boards was successively fused at high temperature plasma incinerator. After calculating, the total electrical energy loss for four powers was about 1,070 kilowatts hours during sample incineration.
Study on Friction and Wear Properties of Water Lubricated Rubber Bearing
Authors: Liao Ming Yi , Xin Bo , Li Qi Biao
Published: September 2013

The friction and wear properties of the water lubricated rubber bearing, made of the nitrile butadiene rubber (NBR), were studied in this article. The results showed that adding the appropriate amounts of carbon black and molybdenum disulfide (MoS2) could reduce the friction coefficient and the abrasion loss to the minimum values. Meanwhile, the general laws of the two parameters with different loads, rotational speeds and lubricant media have been discovered: the values of friction coefficient and abrasion loss of the rubber bearing, lubricated in both water and seawater, increase firstly and then gradually decrease with the increasing loads.When the loads exceed 500N, the values increase drastically. And the values of friction coefficient and abrasion loss decline with the increasing rotating speed. Moreover, the values of these two parameters in seawater were a little bit higher than those in water. The friction and wear mechanisms of water lubricated rubber bearing were also discussed..
Numerical Simulation on Upsetting Process of Large Forgings
Authors: Meng Jing , Wang Qiang , Cai Dong Mei
Published: September 2013

The numerical simulation on upsetting process of large forgings is conducted by using ANSYS/LS-DYNA. The FEM model is established by determining materials, contacts, constraints and loads. The distributions of strain and stress are calculated and discussed. Drum shape coefficient is defined to measure the nonuniform in deformation. The simulative values of upsetting forces are compared with those in theoretical methods, which gives the same change tendency and consistency. Influences of height-diameter ratio to strain, drum shape, tangential stress and upsetting force are also investigated, which provides basic guidance to determine process parameters in upsetting.
Performance Control Research of Oil Distribution Plate Parts by Laser Direct Rapid Forming Based on the Ultrasonic Vibration
Authors: Wang Jian Bin , Zeng Qing Sheng
Published: September 2013

Aims at the performance of the oil distribution plate parts with laser direct rapid forming, and referring to the role of ultrasonic vibration in areas such as casting, welding, sintering etc. , and utilizing the neural networks and the genetic algorithm to optimize the process parameters, the article does the basic research of laser direct rapid forming distribution plate parts based on the ultrasonic vibration. The results indicates that this study can greatly enhance the wear resistance, the corrosion resistance and the fatigue properties etc. of the laser sintering distribution plate parts, having a good guidance to the practical production.
Experiments of Rock Cutting with Nano-Cemented Carbide
Authors: Kuai Ji Cai
Published: September 2013

Nano cemented carbide is a new style cutter material. Because its grain size is very small, it is superior to common cemented carbide in properties, such as high hardness, fracture toughness, flexural strength and higher abrasion resistance. It is proposed to have wide application prospect to tools and mould manufacturing, machinery manufacturing, geological drilling, mining, oil field development, etc. In this paper, nanocemented carbide tool was ground with ELID technology, and the marble were cut with nanocemented carbide, and the cutting properties of nanocemented carbide were studied. Results imply that the tool life of nanocemented carbide is 0.5-1 times longer than that of common cemented carbide at low cutting speed. Which means the nanocemented carbide is more suitable for machining hard and brittle material than common cemented carbides at low cutting speed. And the microscopic analysis showed, the mechanism of tool wear is the abrasive wear as well as the shedding of WC hard phase within Co phase caused by the hard spots shed from the marble embedding in the internal part of binder phase Co which is located in the hard phase WC.
The Design of a 1~13 GHz GaAs Travelling Wave Amplifier
Authors: Pu Yan , Wang Guo Qiang , He Zheng Rong , Liu Lin Tao
Published: September 2013

A 4-stage travelling wave amplifier with 10dB ± 1.2 dB gain and 12 GHz bandwidth is presented in the paper. The parameters of the small signal equivalent model about the GaAs PHEMT are extracted to evaluate the characterization of the device, which is also used to design the amplifier. The amplifier has a minimum noise figure lower than 4.8 dB in the frequency range, and the S11 and S22 are below-10 dB and-7 dB, which demonstrate a good performance. The P1dB and IIP3 are 7.3 dBm and 24 dBm, respectively, and the saturation output power is above 20 dBm at 13 GHz.
A Sub-1V High Precision CMOS Bandgap Reference
Authors: Zhou Qian Neng , Xue Rong , Li Hong Juan , Lin Jin Zhao , Li Yun Song , Pang Yu , Li Qi , Li Guo Quan , Deng Lu
Published: September 2013

In this paper, a low temperature coefficient bandgap voltage (BGR) is designed for A/D converter by adopting piecewise-linear compensation technique. The designed BGR is analyzed and simulated in SMIC 0.18μm CMOS process. Simulation results show that the PSRR of the designed BGR achieves-72.51dB, -72.49dB, and-70.58dB at 10Hz, 100Hz and 1kHz respectively. The designed BGR achieve the temperature coefficient of 1.57 ppm/°C when temperature is in the range from-35°C to 125°C. When power supply voltage VDD changes from 1V to 7V, the deviation of the designed BGR output voltage VREF is only 4.465μV.
A Classification of Power Load Based on the Load Characteristic in Distribution Networks
Authors: Li Jian Peng , Zhang Song , Shan Yuan Yuan , Li Yi Nong , Jiang Feng Qing
Published: September 2013

Nowadays the widest used classification of power load is based on the industry they belonged to, but, as low voltage loads are varietal, even the loads in the same industry can be considerably different in load characteristics of them. In this paper, power loads are classified according to three load characteristic indicators: load averages, load changing cycle and the peak-valley ratio, which are based on the typical daily load curve of them. In this method, the typical daily load curves of loads in the same type are relatively more similar, which is in favor of further study using daily load curve. In this paper, thousands of 10kV loads in shanghai have been classified into 8 types in the method, and the analysis of the load types have been presented.
Fast Terminal Fuzzy Sliding Mode Control for Attitude of Flapping Wing Micro Aerial Vehicle
Authors: Hu Sheng Bin , Xu Jin Yuan , Wu Xuan , Zhang Chi , He Yi Hao
Published: September 2013

A fast terminal fuzzy sliding mode control scheme for the attitude of flapping wing micro aerial vehicle is proposed in this paper. Based on the feedback linearization technique, a fast terminal sliding mode controller is designed. To diminish the chattering in the control input, a fuzzy controller is designed to adjust the generalized gain of fast terminal fuzzy sliding mode controller according to fast terminal sliding mode surface. The stability of the control algorithm is verified by using Lyapunov theory. Simulation results show that the proposed control scheme is effective.
Architecture of Energy Conservation in the Iron and Steel Enterprises Based on Internet of Things
Authors: Wang Jun , Hu Jing Tao
Published: September 2013

The management of saving energy is a weak link of Chinese industrial energy conservation at present. Modern industrial enterprise energy system shows characteristics as followed: the multielement of energy mediathe complication of Energy equipmentEnergy demand more targetingthe networking of Energy supply. The new change of system put forward the new requirements to the energy management. Due to early of energy management system (EMS) is focus on energy data acquisition and centralized monitoring, and the deep analysis of the energy system is not enough, so it can't use the useful information from energy data mining effectively, especially the optimization of energy use, and can not meet the requirements of it. The paper create the architecture energy conservation of Industry entirety, based on the pan under the environment of network, under the background of informationization and industrialization depth fusion iron and steel enterprises , Promoting the change of energy production and utilization means, making progress in comprehensive utilization of resources Energy conservation and emissions reduction, etc..
Design of the Positive and Negative Buses Voltage-Sharing Converter
Authors: Ma Yu Li , Ma Yu Shan
Published: September 2013

The converter can supply auxiliary power and ensure bus balances on the hardware. The converter used design method of single-ended flyback, clamping-diodes balanced the positive and negative buses. The design plan and parameter are described. The practice shows that the circuit can provide auxiliary power capability of 60W and the uneven degree of the positive and negative buses is 1.8V. The circuit can be used in any switching power supply, whose bus voltage range is ±(260-450)V.
Design of Tungsten Tailing Reservoir Safety Monitoring and Warning System Based on Wireless Sensor Networks and LabVIEW
Authors: He Xue Wen , Sheng Ying Fei , Fan Kuan Gang , Zheng Le Ping , Cao Qing Mei
Published: September 2013

In view of the existing flaws of traditional manual observations, a new type of tailing reservoir safety monitoring and warning system based on ZigBee and LabVIEW was designed. The system chose SoC chip CC2530 as the RF transceiver and designed the low-power wireless sensor networks nodes to collect and process the data of tailing reservoir. It chose ZigBee 2007 as the network communication protocol, and uploaded the data to PC by RS232 serial port. The monitoring and warning interface of PC was completed with LabVIEW. The testing results show that the data transmission of the network is stable and the system is suitable for real-time monitoring and warning of the tungsten tailing reservoir.
The Necessity of Intelligent Transformer On-Line Monitoring Configuration Analysis
Authors: Yuan Lu Lu , Yuan Zhu , Zhang Wei Wei
Published: September 2013

Intelligent transformer as an important part of intelligent substation, can be flexible and controllable and can real-time monitoring, protection, control transformer normally. online monitoring is the guarantee of realization of intelligent transformer, Partial discharge on-line monitoring optical fiber temperature measurement, casing medium on-line monitoring, winding on-line monitoring are the most important three aspects. The commonly used methods of Partial discharge on-line monitoring, a pulse current method, UFH method, gas chromatography, and ultrasound. The analysis of necessity of the main transformer partial discharge on-line monitoring configuration, and the fiber winding temperature online monitoring configuration.
On Improved Delay-Range-Dependent Stability Criteria for Linear Systems with Interval Time-Varying Delay
Authors: Hui Jun Jun , Zhang He Xin , Meng Fei , Zhou Xin
Published: September 2013

In this paper, we consider the problem of robust delay-dependent stability for a class of linear uncertain systems with interval time-varying delay. By using the directly Lyapunov-Krasovskii (L-K) functional method, integral inequality approach and the free weighting matrix technique, new less conservative stability criteria for the system is formulated in terms of linear matrix inequalities .Numerical examples are given to show the effectiveness of the proposed approach.
Study on the Combination of SOM and K-Means Algorithms in Manufacturing Process Quality Control
Authors: Li Yi Bing , Pan Fei
Published: September 2013

Nowadays, customers are seeking products of high quality and low cost. The use of neural networks in quality control has been a popular research topic over the last decade. An adaptive self-organizing mapping (SOM) neural network algorithm is proposed to overcome the shortages of traditional neural networks in this paper. In order to improve the classification effectiveness of SOM neural network, this paper designs an improved SOM neural network, which combined the SOM and K-means algorithms. The flow of combination of SOM and K-means algorithms was analyzed in this paper. And the case study of cement slide shoe bearing in manufacturing process was also given to illustrate the feasible and effective.
Discusses on the Application and Development Prospect of Mechanical Automation Technology
Authors: Ran Xue Nong
Published: September 2013

It describes the application and development prospect of mechanical automation technology, reviews the development history of mechanical technology and looks our country mechanical automation in the future, proposes the reference of foreign experience in mechanical automation technology, suggests the priority and development direction to Chinas low cost of mechanical automation technology.
Optimization Design of Modular Desktop Micro-Assembly System Based on Genetic Algorithm
Authors: Zhang Xiao Feng , Zhang Zhi Jing , Ye Zhi Peng , Li Yan , Jin Xin
Published: September 2013

For solving the problem of non-silicon MEMS assembly, the framework of Modular Desktop Micro Assembly System (MDMAS) is proposed, the fundamental principles and functional modular partition method of which is described in this paper. Based on it, the structure-capability correlation matrix and structure autocorrelation matrix are established, and the multi-objective optimization design model is constructed. In addition, GA (genetic algorithm) is introduced for best solution searching, and the proposed design method is validated
Remote Medical Diagnosis System Based on Bluetooth
Authors: Yuan Jiang , Miao Ke Hua
Published: September 2013

This paper puts forward a wearable jacket concept, which combines sensor, fabric cable and flexible circuit board , to achieve synergies, dynamic monitoring of multiple physiological parameters in daily life and working environment. It has the characteristics of physiological signal detection, signal extraction function, and using the Bluetooth technology to realize data backup, to facilitate the further analysis, It can also use the communication equipment with Bluetooth function, remote medical services and other functions.
The Dynamic Balance Research of Shaft System in Carpet Tufting Machine Based on Matlab
Authors: Sun Zhi Jun , Xu Yang , Huang Shuang , Sun Yi Ze
Published: September 2013

Simulation studies were carried out on the shaft of carpet tufting machine to establish multi-parameter dynamic balancing equations based on Matlab. Through the analysis and comparison of reaction forces between link and spindle before and after dynamic balancing, the optimal parameter solution was acquired under the ideal state. According to the actual situation in the project, the optimum value was obtained by modifying some parameters, which not only made mechanism achieve a better balancing, but also enhanced the transmission of motion performance and improved the operating environment of spindle system.
Research on Parallel Convolutional LDPC Code Based on Random Interleaver
Authors: Liu Ce Lun , Su Xu , Han Long Bo , Wen Xiao Jie
Published: September 2013

Starting from pseudo-random interleaver and parallel convolution respectively, this paper has proposed a simple and fast LDPC encoding method without the loss of BER performance. when we use S-random interleaver, it has a good adaptation in both Gaussian noise channel and Rayleigh fading channel. And it can conduct random pre-encoding directly and does not need to look up for 4-cycles. Even if the number of iterations is low, its performance also remains stable.
An Improved RV Based Fuzzy Cluster Analysis (IRVFCA) Method for Task-Related Functional MRI Data Analysis
Authors: Wang Han , Zeng Wei Ming
Published: September 2013

Functional magnetic resonance imaging (fMRI) has become one of the important tools of functional connectivity studies of the human brain. Fuzzy clustering method (FCM) is a common method for analysis of FMRI data. Traditional FCA methods measure the similarity between the BOLD time course of a centroid and the ones of all other voxels in the brain on the basis of Pearson correlation coefficient. This article puts forward a multi-voxel-based similarity measure, an improved RV (IRV) measure, which takes the hypothesis into account that the function homogeneous voxels of brain volume are spatially clustered within a local region. Experimental validation is presented through four visual fMRI data sets which shows that the IRVFCA method not only has improved the speed of FCA, but has comparatively raised the accuracy of the method.
A Range Imaging Method Based on Chaotic Signal Radar
Authors: Liu S.H. , Hu Z.M. , Tang Y.W.
Published: September 2013

The principle of imaging method based on matched filtering and chaos theory are introduced. On this basis, a new method of range imaging using the correlation function of the chaotic signal is provided. At the same time, simulation models and simulation results are given. The experiment results show this method has the advantages of good range resolution and excellent anti-interference performance, the quality of the reconstruction image is fine.
Single-Image Super Resolution Reconstruction with Pepper and Salt Noise
Authors: Qin Feng Qing , Zhu Li Hong , Cao Li Lan , Yang Wa Nan
Published: September 2013

In order to improve the resolution of single image with Pepper and Salt noise, a framework is proposed. In the low resolution imaging model, the Gaussian blur, down-sampling, as well as Pepper and Salt noise are considered. For the low resolution image, the Pepper and Salt noise is reduced through median filtering method. Super resolution reconstruction is performed on the de-noised low resolution image by iterative back projection algorithm. Experimental results show that the Pepper and Salt noise are removed effectively and the peak signal to noise ratio (PSNR) of the super resolution reconstructed image is improved.
Simulation of the Underwater Target Sound Image
Authors: Li Ming Da , Li Gui Juan , Yang Yang
Published: September 2013

The image of the underwater target was gained by simulating the echo sound of the target. And the target strength was given in the image varying with the direction and distance from the receiving array. The length of the target can be shown in the image. So with information of the target strength and length, the characteristic of the target can be got and the detection of the target can be done.
Harmonic Detection Based on Genetic BP Neural Network
Authors: Song Peng Fei , Zhang Jian Sheng , Zhang Yong Hua
Published: September 2013

In view of the grid has a large number of harmonics, serious interference power quality, but the existing harmonic detection has many disadvantages, this paper uses genetic algorithm to optimize the BP neural network (GA-BP),Combined with fanaticism, independent component technique in the separation technology, achieve rapid separation and accurate fitting for harmonic reduction. The method to solve the problem of slow convergence speed of BP neural network and easier to fall into local optimal solution; Separation, independent component analysis in the signal could not accurate reduction the source signal. In this paper a signal containing harmonic component are simulated. Results show that GA-BP neural network optimization independent component analysis has convergence speed, high precision, compared with the single BP neural network and the independent component analysis of the superiority.
Improved Isomap Algorithm Based on Supervision
Authors: Wu Zhong Yong , Gan Li Li
Published: September 2013

It focuses Isomap isometric embedding algorithm is proposed to improve supervised isometric embedding algorithm (SIsomap). Both supervised manifold learning algorithm, using the introduction of adjustable parameters in the form of classes in the classification problem for the effective use of information, making the manifold learning algorithms for classification classification problems have a stronger effect. Finally, through a series of experiments to fully illustrate the proposed improvement of the effectiveness of the algorithm, the proposed oversight of the manifold learning algorithm can more effectively enhance manifold learning algorithms for classification problems
Study on Driver's Unsafe Gaze Behavior Detection Technology
Authors: Wang Peng , Liu Zhi Qiang
Published: September 2013

A system for detecting and evaluating drivers gaze behavior was proposed. A system for recognizing the drivers unsafe gaze behavior was established using multi-level information and fusion decision method as well. The driving environment and condition is complex as well as the gaze behavior characteristics, and given that, a solution consists of patten classification and the multi-information decision-level fusion were put forward to estimate the different kind model of the driver's gaze behavior. In order to test the proposed strategies,the real time driver's gaze behavior detection system was established. The T characteristic curve proposed through the abnormal behavior parameters of the transverse width between the eyes and the vertical distance between mouth and the midpoint of two eyes, combined with the driver's eyelid closure and the proportion and location characteristics of iris - sclera were studied to get the characterization of the drivers gaze status information. The simulation results indicate that the adaptability and accuracy as well as the intelligent level is significantly improved by using the pattern classification and decision-making technology through multi-source information fusion.