bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of the Surface Electric Field of Transmission Line Conductor
Authors: Liu Yun Peng , Dai Hang Juan , Zhu Lei , Zhu Jun , Geng Qing Zhong
Published: July 2013

With the rapid development of UHV power system in China, corona effect has also been paid more and more attention, systematic study of corona phenomenon and its influence factor would give important reference value to the design of UHV transmission line. In this paper, 2D and 3D simulation model of the corona cage have been established through the ANSYS simulation software. The 2D model only can be calculated and analyzed for a specific cross section, and the 3D model can reflect the field distribution over the whole wires, is superiority than 2D model, and this 3D modeling method can provide reference to wire which surface attached with dirt, rain, snow, and other asymmetric model.
Statistical Analysis for Ventilation Resistance Characteristics of Bolting and Shotcrete Roadway in Nanyangpo Coal Mine
Authors: Wang Yue Wei , Jia Bao Shan , Pi Zi Kun
Published: July 2013

The statistical analysis for frictional resistance of bolting and shotcrete roadway is carried out by using the software of SPSS and statistical principle and combining the coal mine ventilation theory with the actual situation in Nanyangpo coal mine. The results show that the frictional resistance coefficient does not follow normal distribution and the 95% confidence interval is 0.0063~0.0087 N.s2/m4 for frictional resistance coefficient of bolting and shotcrete roadway. The comparison analysis of hectometer friction ventilation resistence is carried out between the statistical results with the actual measurement data in Nanyangpo Coal Mine, and its correlation is highly significant. It verifies that the statistical results is right. It has important application value for increasing the ventilation management level and ensuring the safety production of coal mining enterprises.
The Optical System Design of Head-Mounted Display
Authors: Wang Xiao Feng , Yin Lu , Li Jian Xin , Zhu Ri Hong , Ji Rong
Published: July 2013

With the development of the high resolution micro display device and the virtual reality technology, head mounted display is now going to a commercial age. And the products of their own are also put forward to some special requirements: small volume, light quality, simple operation, object popularity. As the requirements at a suit, it needs excellent optical system design, electronic system design, structural design and many other fields together. In order to solve this problem, we use the software designer Zemax and compact a portable structure optical system, combined with 3D imaging hardware decoding technology, preliminary design a set of glasses declined display system. The system has a watching feeling as you see a 80 inch screen at 3 meters away.
Current Development and Prospect Forecast of Cold Chain Industry and Refrigerated Truck
Authors: Ge Ru Hai , Guan Jun , Ying Long
Published: July 2013

With the advance of society, more and more attention is paid on food safety problem. As the main tool of refrigerated transport, refrigerated truck is the most significant part in cold chain. The current situation of Chinese food cold chain industry and the development of refrigerated truck are presented, and main problems existing are analyzed. Some proposals, which may gaide the development of Chinese cold chain in some degree, are tabled.
An Improved Design of PIFA Antenna on Mobile Phone
Authors: Zhang Li Yun , Xiao Zheng Ron , Liao Jun
Published: July 2013

Firstly, the development and principle of PIFA antenna in mobile phone are introduced, and the typical PIFA antenna design is analyzed. The PIFA antenna simulation is based on HFSS software. It is found that the high frequency bandwidth of this kind of antenna is very narrow. Then related parameters are optimized, by increasing the parasitic branch in high frequency band. Simulation results show that the return loss of PIFA antenna in high band is improved and the antenna can be expanded in high band, and matched in low band simultaneously.
Application of the Improved BP Neural Network in Optimization Design of Control System of Simple Pendulum Surface Plate
Authors: Zhang Hong Zhou , Wang Wei
Published: July 2013

According to the characteristics of large angle of pendulum movement, in order to ensure the stability of the fixed plate motion pendulum, to analysis quantitatively the relation of oscillation angle and plate movement, it designed an automatic flat control system with STC89C52RC as the core of control chip, collected the information of oscillation angle by the sensor of angle,controls the angle of surface plate by advanced four phase stepper motor,uses the improved BP neural network to real-time correction in the software design part, the control system has high control precision, the stability and speedability of control system of surface plate were improved by measuring .
A Method of Calculating Attenuation Factor Based on RFID
Authors: Yang Ning , Zhong Shao Shan , Zhu Hai Ting
Published: July 2013

As the indoor environment is complex,the attenuation model is imprecise.and the wireless location system is inaccurate.It is a effective method calculating attenuation factor with different distance RSSI data and selecting proper reference distance for solving single reference distance defect. The experiment verified that it can modify distance measurement mode and improve the accuracy and reliability of indoor distance measurement based on RFID.
On the Dynamic Mechanical Characteristics of LIGA Nickel
Authors: He Guang , Wang Ya Jun , Ma Wen Rui
Published: July 2013

The dynamic mechanical characteristics of LIGA nickel material are investigated by using a small split Hopkinson tensile bar apparatus (SSHTB). The strain rate related stress-strain curves of LIGA nickel are obtained and with which the dynamic mechanical characteristic parameters of LIGA nickel material under different strain rate are acquired. Meanwhile, the paper draws the conclusion that the dynamic mechanical characteristic parameters of LIGA nickel material increase with the increasing of strain rate by the experiment, which provides a theoretical basis for better application of LIGA nickel material under dynamic load conditions in Micro-electromechanical Systems (MEMS).
Effects of Atmospheric Plasma Treatment on the Surface Properties of Wood-Plastic Composites
Authors: Hämäläinen Kimmo , Kärki Timo
Published: July 2013

Wood-plastic composites are a group of materials with potential to penetrate markets currently dominated by plastic or wood products. The surface properties of wood-plastic composite materials have been found to be similar to those of polyolefin materials, thereby presenting a challenge to the use of adhesive joining methods. Plasma chemistry can be performed to improve the adhesive properties of polyolefin materials. In this research, the effect of atmospheric plasma treatment on polypropylene and spruce (Picea abies) wood-plastic composite surfaces is investigated by contact angle measurement with sessile drop method and tensile strength tests of glued samples. The plasma treatment is performed on extruded WPC profiles. Confocal Raman microscopy and scanning electron microscopy are used for analysis of the material surface. The results show an increase in the contact angle of plasma treated WPC materials and an improvement in the tensile strength of glued samples following plasma treatment. Observation of the Raman spectrum indicates an increase in polar groups after plasma treatment. Scanning electron microscopy shows changes in the surface of the treated samples, which can be seen as increased porosity, possibly due to etching as a result of the plasma treatment. It is concluded that atmospheric plasma treatment for adhesion improvement of WPC materials can therefore be applied successfully, although it has a mechanical effect on the surface of the material.
Numerical Simulation of Distribution of Discharged Gas Fire Extinguishing Agent in High Velocity Flow Field
Authors: Ma Xing Ming , Zhao Lan Ming , Li Yu Nong , Li Di Di , Fu Jia Jia , Han Yu Chong , Qin Jun
Published: July 2013

This paper studied the concentration distribution of gas extinguishing agent numerically in high velocity flow field. Civil aircraft power plant compartment has been a difficult area for its high velocity flow field formed after fire happens. Focusing on this issue, certain results, such as mass flow rate of agent gas, total mass of agent and extinguishing efficiency were presented. A typical apparatus of fire extinguishing system was set up, and its fire-fighting efficiency was evaluated. Critical ratio of mass flow rate and flow velocity, gas discharge time and locations of gas sample tubes were recommended. The results and data can provide a practical way in fire extinguishing system evaluation in civil aircraft power plant compartment.
The Improvement of PQI Density Testing Method of Considering Texture Depth of Asphalt Pavement
Authors: Li Chuang Min , De Tai , Chen Zhi Yong
Published: July 2013

In recent years, nondestructive testing is applied more and more widely on the road detection, PQI as a kind of advanced testing equipment in asphalt pavement detection, it has been paid great attention by the road testing personnel. Based on the analysis of the densities which measured by PQI of different types of asphalt pavement, it sums up that the surface texture depth of asphalt pavement significantly affects the measuring accuracy of the density of PQI. In this paper, it suggests to use sand to fill the surface texture depth of asphalt pavement combining with PQI for pavement density measurement. Field testing shows that, compared with the bulk density of core sampling method, the density measured by PQI has obviously been affected by the surface texture depth of asphalt pavement. As the surface texture depth of the asphalt pavement is deeper, the error between the two methods is larger. Considering the influence of texture depth, the author improved the PQI detection method. The improved method shows that, compared with the bulk density of the core sampling, the coefficient of variation of the original testing method is 10.2%, and the new method is 3.8%. In the original testing method , it use the average value of the core sample densities as the compensation value of PQI measurement in the degree of compaction testing, and the maximum measurement error reached up to 2.2%. While, the improved testing method use the average value of the core sample densities as the compensation value of PQI measurement, the maximum measurement error reduces to 0.7%, the accuracy of the testing result is significantly improved.
The Cracks Checking and Research in Prestressed Arch Slab Roof
Authors: Liu Qi Xia , Chen Ke Wei , Zou Xin , Deng Jun Yan , Liu Cun Zhong
Published: July 2013

The arch slab roof has been widely used in engineering because of its beautiful appearance, good heat preservation and insulation behavior. In this paper, the arch slab crack on its lower chord was analyzed and calculated by project instance, for the causes on the problems of concrete strength below design standard. We can come to the conclusion form studies that the prestressed arch slab roof with strength of C30 or lower should not be used, while C35 may continue to use according to strength calculation and test. Studies dealing with the same type of problems are of profound practical significance.
Effect of Current Waveform on Metal Transfer in Controlled Short Circuiting Gas Metal Arc Welding
Authors: Chen Mao Ai , Jiang Yuan Ning , Wu Chuan Song
Published: July 2013

With high-speed welding inverter and precisely controlling the welding current with arc-bridge state, advanced pulse current waveforms can be produced to optimize the transfer characteristics of short circuiting transfer welding. In this paper, the images of droplet/wire, and the transient data of welding current and arc voltage were simultaneously recorded to study the influence of peak arcing current, background arcing current and tail-out time on the stability of short circuiting transfer process. It was found that maximum short circuiting transfer stability is reached under specific welding conditions. Any deviation from these conditions will cause abnormal rises in arc voltage indicating instantaneous arc extinguishing and greater spatter. Optimal welding conditions were obtained to achieve the maximum stability of short circuiting metal transfer process.
Proposed a Related PageRank Algorithm Based on the User's Interest
Authors: Xian Xiao Ping , Li Yue Guang
Published: July 2013

In order to improve search engine retrieval quality, using the vector space model is proposed based on the user's interest page pre-classifying and content related PageRank algorithm, the two aspects of the weights to influence of web pages with the PR value. Through the simulation experiment after improved algorithm experimental result, compared with the original algorithm, the improved algorithm precision better than the original algorithm.
Facile Fabrication of Bi2O3 Chaplet-Like Nanoparticles
Authors: Gao Yan Ping , Wu Zhi Fu
Published: July 2013

Bi2O3Chaplet-like Nanoparticles have been fabricated. Most of them have the average inner diameter of 200nm and the mean rim thickness of 20nm. Photoluminescence spectra of the nanorings at room temperature were investigated, which demonstrated that the rings present excellent optical properties. The influence of aging time on the morphology and structure of β-Bi2O3superstructures was also studied, indicating that the nanorings superstructures were transformed into nanoplates after a long aging time. The formation mechanism of the β-Bi2O3superstructures was also explored. This approach will be further extended to solvent-controlled fabrication of related minerals with novel complex superstructures.
Method Study of Mineral Weight Information Extraction Based on Hyperion Hyperspectral Remote Sensing Data - The Region of Gannan as an Example
Authors: Zhang Chuan , Ye Fa Wang , Zhang Dong Hui , Zhao Ning Bo , Wu Ding
Published: July 2013

In this paper, the methods of extracting minerals weight information are studied based on hyperion hyperspectral remote sensing data, taking the region of Gannan area in Jiangxi as an example. After studying spectral angle mapping and matched filtering, the method has been developed which combines them to extract the weight information of minerals. The results show that this method can successfully apply and made spectral angle mapping integrate with matched filtering, combined their advantages and made up their shortcomings, and extract weight information of clay minerals accurately from the background image. Meanwhile, the location of all kinds of mineral and results of mineral mapping are consistent very well, reflecting the application feasibility of the method.
A Laboratory Study of Polymer and Surfactant Binary Combination Flooding in Reservoirs with Low to Medium Permeability
Authors: Wang Guo Feng , Song Lian Zhen , Wei Zhi Li , Wang Xue Wu
Published: July 2013

Based on the viscosity of 10mPa.s after high speed shearing and the limit surfactants up to ultra-low interfacial tension, polymers and surfactant systems suitable for Longhupao oilfield were optimized by means of mixing formation simulation water with different polymers and surfactants. The relationship between the interfacial tension of the compound system and the component concentration, the effect of surfactants on viscosity, the injectivity of the compound system, etc. were studied on the basis of the research on the binary compound system. The results indicate that the viscosity of the compound system is lower than that of a single polymer solution to a certain degree and the compound system has good migration character in cores. In addition, core flooding experiments on slug combination optimization were made. The experiment results show that the compounded system with pre-pad polymers and surfactants has good oil displacement efficiency and in terms of enhancing the recovery efficiency, chemical flooding should be implemented as soon as possible.
Design and Research on Video-on-Demand System Mathematical Model Based on Operations
Authors: Liu Shu Yuan
Published: July 2013

Operations research theory of stochastic service at fast food restaurants, banks, video-on-demand, and web access should be extensive. This paper is a study of the design of its video-on-demand system model. We design and built a specific mathematical model, and analysis of algorithms and test results. We propose video stream control method based on popularity, and the popularity of the program is divided into two types of popular and unpopular, analysis of the system instantaneous transition probability, and designs the popularity of video streaming bandwidth prediction formula. The results show that this method can effectively save server resources, and improve the level of service of video. This queuing analysis method can also be applied in other similar random service system.
Proteomic Analysis of Gill Mucus from Grass Carp Ctenopharyngodon idella
Authors: Liu Guo Yong , Shi Xiao Tao , Tu Zhi Ying , Liu Li Ming , Huang Ying Ping
Published: July 2013

Fish gills is part of the first-line defense in fish. The proteome in gill mucus of grass carp (Ctenopharyngodon idella) was examined in this study. Two-dimensional polyacrylamide gel electrophoresis, in combination with size exclusion chromatography, was used to resolve the proteins. Two-dimensional maps of gill mucus revealed 406 distinct spots with Coomassie blue staining, of which 256 protein spots were subjected to identification using matrix-assisted laser desorption / ionization time-of-flight (MALDI-TOF), matrix-assisted laser desorption / ionization tandem mass spectrometry (MALDI-MS / MS) and liquid chromatography tandem mass spectrometry (LC-MS / MS). A total of 99 spots representing 52 proteins were identified, including 19 immune-related molecules such as lectin, interlectin, transferrin, and proteasome. Their presence in gill mucus may imply the importance of non-specific immunity in gill mucus. The present study provides the first picture on proteome in mucus of a fish species, and thus the foundation for understanding quantitative and qualitative variation in proteins in the mucus.
Effect of Rare Earth on the Inclusions and Pitting Resistance of Austenitic Stainless Steel
Authors: Liu Xiao , Bo Yu
Published: July 2013

The anodic polarization curves of 21Cr-11Ni austenitic stainless steels with various RE contents in 3.5% NaCl neutral solutions have been measured by electrochemical methods. The effect of RE on pitting corrosion resistance of 21Cr-11Ni stainless steels has been studied by the metallographic examination. The results show that sulfide and other irregular inclusions are modified to round or oval-shaped RE2O2S and RES after adding RE to 21Cr-11Ni stainless steesl. RE makes sulfide, and other irregular inclusions change to dispersed round or oval-shaped RE inclusions, effectively inhibits the occurrence of pitting corrosion, thereby enhancing the corrosion resistance of 21Cr-11Ni austenitic stainless steels.
Study on Antenna near Field Test System
Authors: Shang Jun Ping , Li Xin Rong , Sun Li Chun , Shang Fei Fei
Published: July 2013

Some novel researches on the application of the near-field antenna measurement and the measurement methods, main functions and technical indexes of the test system are presented in this paper. Based on the modern near-field test theory, the manufactured antenna measurement system gives a high precision performance. Continuous wave test and pulse test can be operated with the system. The practical application such as the multi-channel test, multi-frequency shows that the measurement system proposed is a high-precision, multi-functional and automatic system. Additional requirements of the production and current scientific research on the antenna measurement can be satisfied, too. The proposed measurement system is of great value in application and extension.
Preparation of a Novel Selective Adsorbent for Detection and Measurement of Mercury (II) Ions
Authors: Firouzzare Mahmoud
Published: July 2013

In this work, a polymeric adsorbent was synthesized by the imprinting technique for the measurement of Hg (II) ion from aqueous environmental samples. For this purpose, a novel aminothiol monomer has been initially synthesized then it has been used for complexing the mercury. The synthesized complex monomer copolymerized with methacrylic acid and ethylene glycol dimethacrylate and AIBN as the functional monomer, cross-linker and initiator respectively in the presence of a binary porogen of DMSO and toluene. The imprinted polymer was made after removing the mercury (II) ion by an acidic solution of thiourea. The results of batch procedures showed that the Hg (II)-imprinted polymer has adsorption capacity of 28 mg g-1and is high selective for adsorption of Hg (II) ion in competing with the other ions such as CH3Hg (I), Zn (II) and Cd (II) and also in comparing with non-imprinted polymers.
Method for Tensile Measurement of Stud-Less Mooring Chain
Authors: Du Yu , Wu Wen Hua , Yue Qian Jin
Published: July 2013

Tension of mooring chain is the principle characteristic for mooring system. Tensile value which derived from on-site mooring lines could be used for risk assessment, design evaluation etc. It is hard to obtain underwater tension of mooring chain by traditional method, such as strain gauge, FBG, etc. A new tensile measure method is present based on finite element analysis and shape characteristics of stud-less mooring chain. At first, deformation of stud-less mooring chains is analyzed by finite element method and Ansys software. Then, a design of tension-meter is developed on the basis of the deformation characteristic due to the above FEM analysis. Finally, a model calibrate is designed and tested to prove feasibility of present measurement method.
Hardware-Software Subsystem for MOSFETs Characteristic Measurement and Parameter Extraction with Account for Radiation Effects
Authors: Petrosyants Konstantin O. , Kharitonov Igor A. , Sambursky Lev M.
Published: July 2013

Hardware-software subsystem designed for MOSFETs characteristic measurement and SPICE model parameter extraction taking into account radiation effects is presented. Parts of the system are described. The macromodel approach is used to account for radiation effects in MOSFET modeling. Particularities of the account for radiation effects in MOSFETs within the measurement and model parameter extraction procedures are emphasized. Application of the subsystem is illustrated on the example of radiation hardened 0.25 μm SOI MOSFET test structures.
Development of Integrated Data Acquisition System for Logistics Packaging Material Production
Authors: Yan Fang , Guo Yi Chong , Liu Jun
Published: July 2013

Logistics transportation mostly uses foam packing material, the harmless of their production process is the current research focus. Based on National Instrument data collection cardsignal conditioning module and sensors, this paper adopted computer technology to collect data from harmless logistics packaging foam production process, and concentrates on data testing and collection methods. Based on virtual instrument technology, we build a multi-channel universal data collection system. The system exhibits high acquisition efficiency. All of the collected data are the key parameters which are closely related to harmless logistics packaging production, moreover, these parameters are relatively easy to adjust and control in actual production process.
Morphological Versus Crystallographic Texture in a Hot Deformed and Annealed AZ31 Alloy
Authors: Hiba Azzeddine , Saida Abdessameud , Baya Alili , Djamel Bradai
Published: July 2013

An analysis based on scanning electron microscopy coupled with EBSD system unveiled the absence of morphological texture in hot deformed and annealed AZ31 alloy. Samples of industrial AZ31 alloys have undergone two deformation types (hot rolling and hot uniaxial compression). We have evidenced the absence of any correlation between the morphological parameters (shape coefficient and standardized equivalent diameter) and the basal type crystallographic texture dominated (the {0001} basal plane being parallel to the normal direction and to the intended compression direction).
The Improvement of Command Voltage Signal Instability for Equipment Calibration in Outdoor Field
Authors: Niu Man Ke , Lei Zheng Wei , Yang Bao Qiang
Published: July 2013

In a kind of large test system, the whole equipment is constituted of many multiple subsystems. These subsystems become one by the interconnection. During the measuring and calibrating procedure for the test system at the outdoor training venue, many low-voltage DC signal the need to be measured at very high precision. The signal being measured were often found instability caused by the interference from various kinds of factors in the actual measurement, In order to ensure accuracy of measuring data and credible for results, to provide practical and reliable data reference for the effectiveness of the equipment system, we must analyze the causes of interference and to take effective measures targeted respectively.
GBAS Air-Ground Irrelevant Error Monitoring Method and its Application
Authors: Fang Ji Si , Zhu Yan Bo , Wang Zhi Peng
Published: July 2013

In GBAS, multipath and RFI/noise are air-ground irrelevant errors, and they could not been removed by the pseudorange difference between the aircraft and ground station. In the paper, the relationship between the B value and air-ground irrelevant error is analyzed. Since the B values for all the ground receivers are not independent, an assistant value named C is employed. Combining the characteristics of the pseudorange corrections matrix, a new method on GBAS air-ground irrelevant error monitoring is proposed. However, the method could not distinguish between multipath and RFI. Fortunately, previous study has proposed a method for detecting RFI through integrity monitoring at a DGPS reference station. Assuming the serious multipath and RFI will not appear simultaneously, user could ascertain it is multipath or RFI causes the air-ground irrelevant errors to exceed the threshold. Simulation results validated the utility of the proposed monitor methods.
Comparative Study on Preparation of Al2O3-ZrO2 Composite Powders by the Complexing Precipitate and Carbonblack Coating Methods
Authors: Yuan Guang Liang , Xue Qun Hu , Yang Yuan
Published: July 2013

Al2O3-ZrO2 composite powders were prepared by the Complexing precipitate method and Carbonblack coating method, and then the powders were characterized by laser particle size analyzer, XRD, and TEM. The results show that: the two methods are both can be used to prepare Al2O3-ZrO2 composite powders. The particle size of the composite powders prepared by Carbonblack coating method is larger than that prepared by Complexing precipitate method. From TEM, it can be seen that the distributions of Al2O3 and ZrO2 in the composite powders prepared by Complexing precipitate method are more uniform. ZrO2 was coated by Al2O3 particles mostly, however, in the composite powders prepared by Carbonblack coating method, part of the particles agglomerated seriously.
Influence of Aluminum Hydroxide Particles on the Properties of Polyurethane Based on Unsaturated Polyester
Authors: Wu Xiong , Zhou Bai Jie , Meng Fan Zhuo , Hu Qian , Pan Ji Lin
Published: July 2013

A polyurethane based on unsaturated polyesters (PUP) was prepared, which can be cured and cross-linking reaction under room temperature. The polyurethane-based resin exhibited excellent endurance to acid and base relative to traditional unsaturated polyester resin. Different content and particle size of aluminum hydroxide particles were added into the PUP to improve the properties of final materials. Experiment results showed that proper content and size of aluminum hydroxide particles can improve the mechanic properties, thermal stability and electrical insulation of PUP materials to some extent. Such result was confirmed by the fracture morphology of the samples because of the well dispersion of aluminum hydroxide particles into PUP phase.
High-Order Model of Thermo-Piezoelectric Composited Plate
Authors: Xie Yan , Deng Bin , Chen Jing Jing , Li Dao Kui
Published: July 2013

A finite element formulation is developed for laminated composite plate bonded with piezoelectric layers. To improve the accuracy of the prediction of the plate deformation, a high order shear deformation theory is used, whereas the through-the-thickness linear temperature field distribution is assumed. For the electric potential, a new high order theory has been used. Numerical results of a piezoelectric laminated plate show the significant impact of piezoelectric coupling and pyroelectric effects on the sensory response. Furthermore, the pyroelectric effects will influence the transverse shear stress insignificantly.
Preparation Study of WO3 Nano-Powder with Micro Emulsion Method
Authors: Diao Xian Zhen
Published: July 2013

WO3 nano-powder was prepared by CTAB/n-buoh/octane/H2O micro emulsion system, Na2WO4 and hydrochloric acid as raw material. And the structure, size and topography of WO3 nano-powder were characterized with X-ray diffractometer, transmissive electron microscopy. The result showed:calcination temperatures and different reactant types affect WO3 characteristics evidently; In moisture content 8%, calcining temperature 400°C conditions, small particle size、distribution uniform and spherical shape WO3 nano powder with micro emulsion method is prepared.
Optimizing Study of Solidification Agent with High Neutralization Degree Compound Phosphate-Bonded No-Bake Sand by Orthogonal Test
Authors: He Dan , Xia Lu , Zhang You Shou , Huang Jin
Published: July 2013

Regarding dry strength and storage strength of high neutralization degree compound phosphate no-bake sand as index, optimization was analyzed on the ratios of solidification agent to obtain the appropriate adding amount in different environment by orthogonal test, and influence of optimum formula on the storage stability of the no-bake sand was studied. The results show that, in condition of up 25°C, when humidity is more than 60% RH, the formula of solidification agent is 5% Mg-contained powder + 2% Al-contained powder + 4% Zn-contained powder, its no-bake sand sample has high dry strength and good storage stability. When humidity is less than 60% RH, the formula of solidification agent is 2% Mg-contained powder + 2% Al-contained powder + 4% Zn-contained powder, its no-bake sand sample has high dry strength and good storage stability.
Pure Al Coatings Prepared by Arc-Added Glow Plasma Depositing Technique and Subsequence Plasma Oxidation
Authors: Wang Chen , Chen Teng Fei , Tao Jie
Published: July 2013

Al coatings were prepared on 316L stainless steel substrate by arc-added glow plasma depositing technique and then plasma oxidized. The influences of bias voltage and arc source current on both the thickness and surface roughness of Al coatings were investigated respectively. Then, the microstructure and the composition of Al and Al2O3 coatings were characterized. Finally, the bonding force and the corrosion resistance of as-prepared alumina coatings were discussed. The results indicated that nanostructured pure Al coatings with surface roughness (Ra) of 267.93 nm were obtained when the bias of the substrate was-300V and the arc current was 70A. The Al2O3 coatings oxidized from nanoAl coatings were dense and uniform, with a bonding force of 37.4 N, an excellent corrosion potential of-0.202V and corrosion current of 0.197 μm·cm-2 in 3.5% NaCl solution.
Study on the Synchronizing Time and Shift Quality of Automated Manual Transmission (AMT)
Authors: Zhang Zhi Sen , Ling Ling , Wu Bai Hai , Chen Zhen Sheng , Li Jun Hao
Published: July 2013

By the synchronizing time, the synchronizing force was controlled reasonably. The impact factors on synchronizing were analyzed and the shift synchronization time was studied. The benchmarking and the road tests were carried out for further investigation. Test data show that by the developed AMT shift control strategies, the average synchronization time is as follows: under the benchmarking condition the minimum time is 100ms (3->4 gear) while the maximum time is 485 ms (0->1 gear); under the road test condition the minimum time is 55ms (4->5 gear) while the maximum time is 100 ms (3->4 gear); The jerk as the utility comfort evaluation index under the road test condition was analyzed and the result was 5.43 m/s3 which satisfied the automated transmission requirement perfectly.
Experiment of a Resistive Superconducting Fault Current Limiter Based on MgB2 under Different Supply Voltages
Authors: Yao Lei , Mei Jun , Zheng Jian Yong , Liu Bin , Xu You
Published: July 2013

In order to limit the short-circuit current, and to prevent the power grid and its equipment from the shock of the short circuit, the fault current limiter with detection, trigger and limiting was introduced. A small resistive type superconducting fault current limiter prototype based on MgB2, cooled by liquid helium and heliumgas, was developed and tested by a test system. The test result showed that the prototype based on MgB2 produced superior limiting performance, the short-circuit current suppressing ratio was up to more than 45%, and with the rise of the voltage level, the current limiting capability was also gradually increased, up to 56%.
Dynamic Characteristics Analysis and Topology Optimization of Column Based on Finite Element Method
Authors: Chen Jing , Yang Ze Long , Li Xian Xuan
Published: July 2013

Aiming to improve the dynamic and static characteristics of a type of machining center column, the finite element modal analysis and harmonic response analysis of the column are performed, and this paper analyzes the dynamic characteristics of the column based on the first five mode shapes and natural frequencies of the column and the displacement - frequency response curves of the column. Topology optimization analysis of the column is performed with ANSYS, and the finite element analysis is performed on the column again after the column structure is improved based on the optimal distribution of material of the column structure and the design experience of column. The result shows that the first five natural frequencies of the column increase, the peak of the displacement - frequency response of the column decrease, and the dynamic characteristics are improved significantly.
The Preparation of Fluorescent Fibers from FCNPs and Calcium Alginate
Authors: Zhang Yu Xi , Zhao Zhi Hui , Xu Wen , Pan Ruo Cai , Xia Yan Zhi
Published: July 2013

Stable fluorescent carbon nanoparticles (FCNPs) with excellent water-solubility were prepared firstly by one-step ultrasonic treatment from the blending of glucose and sodium hydroxide. Then, the fluorescence calcium alginate fibers were successfully prepared through wet spinning, using the mixture of FCNPs and sodium alginate solution as the spinning dope. The fluorescent property of FCNPs and fibers were investigated using fluorescence spectrophotometer. Single fiber strength tester was used to measure the strength of the fluorescence fibers. The results showed that both FCNPs and fibers emitted bright blue color under 350nm wavelength UV irradiation. The strength of the fibers was improved when the content of FCNPs in the fibers achieved certain value.
Development of Seedling Vegetable Harvester Based on SolidWorks
Authors: Sun Hai Bo , Guo Yi , Tian Su Bo
Published: July 2013

With the help of SolidWorks, the three-dimensional modeling of seedling vegetable harvester was virtually designed based on the harvesting needs for automated seedling vegetable in production, then the parameters of machine parts were determined and the machine was assembled. The prototype is composed of chassis, frame, running device, cutting device, conveyor devices, protecting device, etc., which has the characteristics such as simple structure, high efficiency, low labor intensity, good working quality, safety and reliability, low operating costs, and easy maintenance.
Design on Control System of Seedling Vegetable Harvester Based on Single Chip
Authors: Guo Yi , Dong Song , Tian Su Bo
Published: July 2013

Based on STC89C52RC Single Chip microcontroller, the control system of seedling vegetable harvester was designed with the help of modular design method. According to the mode of operation for seedling vegetable harvester, the infrared remote device and photoelectric sensors were selected, and then the hardware of the control system including running system, cutting device and conveyor device was set up. Through the performance test of the prototype, the harvester can go forward, backward, accelerate, decelerate, turn left, and turn right; the photoelectric sensor can control cutting device and transport device to start and stop automatically and easily, which shows the control system has good performance.
The Design and Application of the Turnover Drum Tooling of PROTOS Cigarette Machine
Authors: Liao Yan Pei , Deng Jing Biao , Fei Cheng Cheng
Published: July 2013

It is difficult to disassembly and time-consuming when the turnover drum need to repair or maintenance due to the turnover drum is a complex structure and high precision parts in PROTOS cigarette machine and the original special tooling has some limitations. To solve this problem, a new type of turnover drum tooling is designed. The application results show that the new tooling is an effective solution to solve the turnover drum maintenance difficulties, disassembly time-consuming problem. The maintenance lead time reduce from 12 hours to 4 hours. It also ensures accuracy of parts after the dismantling of the turnover drum and eliminates the security risks that exist in the repair process.
Development and Validation of a LC–MS/MS Method
Authors: Wang Meng , Zhou Wen Jia , Zhang Quan Ying , Huang Ming
Published: July 2013

A simple, sensitive, selective, rapid, reproducible and specific liquid chromatography-tandem mass spectrometry (LC-MS/MS) method has been developed and validated for the identification and quantification of paroxetine (PAX) in human plasma,. Chromatographic separation was performed on XTerra RP18 (5 μm, 150 mm × 4.6 mm i.d.) column with mobile phase composed of 10 mM ammonium acetate containing 0.2% formic acid: methanol (30:70, v/v) at flow rate of 0.9 mL min-1. PAX and CZP were detected with proton adducts at m/z (amu) 330.1 192.1 and 327.2 270.1, in multiple reaction monitoring (MRM) positive mode. The method was validated over the concentration range of 0.05 - 30 ng mL-1. The lower limit of quantification (LLOQ) was 0.05 ng mL-1. The inter-run and intra-run precision was within 2.1-11.8% and 2.2-5.8%, respectively
2FSK Signal Generator Based on AT89C51 Microcontroller
Authors: Gao Xue Fei , An Yong Li
Published: July 2013

In order to simplify the devices used for generating the 2FSK signal, a 2FSK signal generator based on AT89C51 microcontroller is proposed in this paper. A digital base band signal is inputted to the microcontroller through one of I/O ports. Then microcontrollers program is executed, which are designed for generating PWM signals according to the sine waveforms corresponding with 2FSK signals required. Consequently, an appropriate PWM signal is outputted from another I/O port. This PWM signal is sent into a simple second order passive low-pass filter, and the 2FSK signal can be obtained on the output side of the filter. The 2FSK signal generator makes full use of the resources of the microcontroller, and as a result, it is simple, easy to use, economical and reliable.
Design of Remote Control System
Authors: Cheng Fen Fen
Published: July 2013

A multichannel remote control system for intelligent community based on the STC89C54 chip was designed with the technique of embedded Web server. The control system can monitor 255 signals and eight control signals of one node at the same time, and can be connected to the internet by the TCP/ IP protocol. So the field control information can be shown dynamically in a remote computer by way of web pages. The system has high convenience and friendly monitoring interface, then especially is fit for the large community and storage that need multipoint monitoring and frequent switching door.
Design of the PLC-Based Burner Control System
Authors: Hu Hai Dong , Diao Jin Xia , Sun Shao Hua
Published: July 2013

With consideration to the acid gas incinerator burned and the problems identified during its application, renovation program has been proposed. According to the new design, draught burners with automatic control system shall be used to eliminate problems encountered during application of original burner. In addition to implement automatic control of combustion processes, the new system may minimize labor intensity and enhance safety of facilities.
Trust Model Based on Reputation Propagation Mechanism in Cloud Manufacturing Environment
Authors: Niu Peng , Zhou De Jian , Xie Xiao Lan
Published: July 2013

Contrary to the issues of cloud manufacturing environment such as vandalism and fraud, the paper proposes a trust model based on reputation propagation mechanism according to the dynamic nature of the reputation model, given the network reputation spread and establish the appropriate calculation model; "dyadic reciprocity" method used in the calculation model, in combination with beta distribution and Chebyshev inequality to realize the reputation assessment between two nodes.
Research on Adaptive Fuzzy PID Dust Collection System
Authors: Mao Zheng Yu , Zhang Jing Sheng , Zhang Lu Xu
Published: July 2013

Aimed at time lag, time variant, serious inertia, nonlinearity problems and the difficulty of PID controller parameters adjusting, the combination of PID control and fuzzy control was put forward, this paper introduces a kind of design of adaptive fuzzy PID dust collection system of constant pressure with regarding the pressure of the deviation and the rate of change of deviation as the input variables in the ventilation pipe. The three parameters of PID controller can be adjusted by establishing the fuzzy control rules and practicing the fuzzy generalize. The experiment simulation and the practical test show that the response of the system with adaptive fuzzy PID control is much faster than the tradition PID control but the overshoot is lower and quickly achieve the steady-state.
Human Body Motion Capture System Based on Inertia Sensing Technology
Authors: Li Shu Ai , Wang Yong Sheng , Xiang Rui Pai
Published: July 2013

To solve the bottleneck problem of defining motion trajectory of virtual role in animation creation process, this paper presents a solution of mechanical human body motion capture technology, mainly involving inertia sensing technology, Bluetooth, the design of sensor network nodes and the development of reconstruction software of human body motion model. The system uses sensor network to collect motion data of the body key joints, and the data are delivered to workstation through Bluetooth, the software on workstation uses analytical inverse kinematics algorithm to analyze the motion data. So the system has advantages of lower cost and high precision. Meanwhile, the paper also provides a solid foundation for the research of multiplayer real-time motion capture technology.
Controller Design of 8/6 Switched Reluctance Drive with Fuzzy Control
Authors: Gao Cai Xia , Xin Wang , Lin Yu
Published: July 2013

The high noise, torque ripple and cannot obtained good performance in wide speed range are main disadvantages of Switched Reluctance, in order to solve the above problems, a new control strategy for SRD using the variable-structure control mode based on fuzzy control is designed and presented in this paper, using the Speed & Current double loop under the base speed and fuzzy angle control above the base speed. Current loop adopted current tracking control and speed loop adopted parameter self-tuning fuuzy PI control , and the perspectives of power conversion circuit and fuzzy-logic-based turn-off Angle compensation are used to suppress torque ripple. The simulation and experiments show that the Switched Reluctance Drive system designed in this paper maintains the desired speed with the advantages of high efficiency, real-time, good dynamic performance and less torque ripple.
Application of Synergistic Optimization Method by Maximin Fitness Function Strategy Based Multi-Objective Particle Swarm Optimization Algorithm in Metal Bellows Structural Design
Authors: Yu Xiao Mo , Qin Ai Ling , Xue Jia Hai , Ye Jun Ke , Zhou Wen Jing
Published: July 2013

In this paper, the forming process is applied to the structure design of the metal bellows for the synergistic optimization.With bellows minimum overall stiffness and minimum weight for the optimization objectives to establish multi-objective optimization design model, using the Maximin fitness function strategy based multi-objective particle swarm optimization algorithm and introduce the multiple subgroup cooperative search strategy by master-slave clustering to get the optimized solution at the same time. The algorithm is applied to the synergistic optimization of the metal bellows structure design. The results show that the convergent speed of the algorithm is fast and can effectively approximate the actual bellows structure design, and provide users with more practical and intuitive effectively design scheme.
Impact of DC-Power Connection on the Stray Inductance of Bridge Arm in High-Power Converters
Authors: Zhu Yi  Feng
Published: July 2013

In high-power converter design, low-inductance busbar connecting DC capacitors and power devices is main concern to improve the quality of the whole power electronics system. There are several facts which affect the stray inductance of bridge arm. This paper mainly analyzed the influence of DC-power connection on the stray inductance. The Psim9.0 software were used to calculated the stray inductance. The conclusion is that DC-power connection should be put different side of DC capacitance because lower stray inductance can be obtained than that of the same side. The simulation results are given to illustrate the effectiveness.
Model Predictive Control Application to Flexible-Bodied Railway Vehicles for Vibration Suppression
Authors: Orukpe P.E.
Published: July 2013

In this paper, we apply model predictive control (MPC) based on mixed H2/H to active vibration control of the flexibility of railway vehicle to improve ride quality. However, the flexibility in the body of high-speed railway vehicles creates difficulties which in practice may result in the body structure being heavier than what it is supposed to be. The use of active suspension helps to model the vehicle and its flexibility in an effective manner. Conventional control approaches are compared with linear matrix inequality MPC technique using flexible-bodied railway vehicle as an example. The result indicates that the MPC technique performs better in improving ride comfort compared to the passive and classical techniques when flexible modes are present.
Optical and Electron Emission Properties of h-BN Films Codoped with Mg and O Atoms
Authors: Ohtani Shinji , Kobayashi Kenkichiro
Published: July 2013

Films of hexagonal BN (h-BN) codoped with Mg and O atoms were grown on n-type Si and quartz substrates heated at 500 °C by sputtering targets consisting of h-BN and MgO powders. An absorption is seen at a wavelength < 400 nm for h-BN films prepared in an Ar atmosphere. In contrast, films prepared from the target containing 0.25 mol% MgO in an atmosphere of Ar + 1% O2 shows an absorption at a wavelength < 260 nm and an electron field emission at a lower electric field of 3.6 V/μm.