bluuebunny/crossref_metadata_2025 huggingface dataset:
Orthogonal Optimization of Ultrasound-Assisted Ionic Liquid Transesterification of Corn Oil Biodiesel
Authors: Bi Yong Guang , Wu Shan Shan
Published: September 2013

In order to optimize the ultrasound-assisted corn oil biodiesel transesterification process conditions, factors four through five levels of orthogonal test to optimize their processes, the findings indicate that ultrasound-assisted transesterification of corn oil biodiesel optimum conditions : 1:11 molar ratio of methanol to oil, corn oil catalyst was 11%, the reaction temperature is 90 °C, reaction time was 50min, ultrasonic power 360W, under these conditions, the measured ratio of the average of the transesterification 91.85 %. Relative to conventional preparation methods, the method is simple, rapid, saving solvent consumption and other advantages.
Research on the Communication of the Serial Port between the Host Personal Computer and CC2430
Authors: Xin Zheng Hua , Wu Xiao Yin , Zhang Qian , Hu Liang Yi
Published: September 2013

The system completes the communication between the personal computer and the CC2430 by the serial port. The serial port is not the RS232 serial port but a port from A type to the USB port. The phenomenon of the experiment is displayed with the help of the serial debugging assistant. The operator can send the data and receive it from the personal computer to the CC2430 on the computer. On the other side, the CC2430 is able to receive the data from the host computer and send it to the host computer. This realizes the operator controls the CC2430 by the personal computer. It consists the hardware part and the software part.
Enhance of Synchronization of Communication in TD-LTE RF Conformance Testing Instrument by GPMC
Authors: Chen Fa Tang , Guo Li Qiang , Wang Peng Rui
Published: September 2013

In order to satisfy the requirement of reliability in the TD-LTE RF Conformance Testing Instrument, a method to achieve the synchronization of protocol and physical layer based on embedded system is imposed. According to the feature of the long term evolution (LTE) system, it highlights the details to enhance the synchronization between various aspects in the LTE system through General-Purpose Memory Controller (GPMC) from ARM. GPMC is a memory controller that helps achieve the primitive interaction between the protocol and physical layer and the application. What is more important is that GPMC achieves the coordination that means LTE works at the same time in the same frame of the same sub-frame. Verified multiple times this design achieves the synchronization of aspects in LTE as well as meets the requirement of hardware platform in TD-LTE RF Conformance Testing Instrument.
Research on the Design of Intelligent Access Control System Based on Radio Frequency Technology and Image Processing Technology
Authors: Ding Hui
Published: September 2013

With the continually development of computer technology and modern communication technology, radio frequency technology and image processing technology become the important component of modern security system. In particular, the application of the intelligent access control system of the two technologies becomes a hot research topic in the field. This article first briefly analyzes the principle of radio frequency technology and establishes intelligent access control system based on radio frequency technology and image processing technology. It analyzes the theory and application compatibility of this system which provides technical support and theoretical basic for the researches in this field to some extent.
Factor Analysis of Technical Movement of Image Processing Technology in the Dance
Authors: Yang Yan Xia , Li Hai Yan
Published: September 2013

In recent years, the movement capture technology has very big development in aspect of computer science and information technology, and the design of dance movement needs the 3D aesthetic feeling to have optimization, so the capture and simulation of the elements of dance movement should become the key to have researches on the dance image processing. This paper used the image analysis technology to establish the mathematical model of capture analysis on the dance movement technology, and it put the five main parts of dance movement as the main research object, and then it put forward the similarity of continuity of the dance movement. The first part of the paper made the detailed analysis on the application of computer image processing technology in the design of dance movement, and the second part had the theoretical analysis on the design of dance movement. Finally the paper used the software of video production videostudio9, and it programmed procedure to have multi-media design of the dance movement in the computer, and then it achieved the effect of the combination of computer technology and the dancing technique, and finally it provides the theoretical reference for the research design of the technology of dance movement.
Application of Mixed Programming with MATLAB and VC++ in Research of Satellite Mobile Communications Fading Channel
Authors: Xu En Qing , Fan Sen Quan , Wang Si Wei , Chen Jia Qiu , Wang Tian Bo , Wu Wen Xiu
Published: September 2013

We need to achieve real-time parameter control and process a large number of complex numerical calculations in the research of satellite mobile communications fading channel. MATLAB has powerful numerical calculation functions and graphing display characteristics, VC++ has powerful functions to make program interface and can achieve port operation, real-time processing. MATLAB and VC++ mixed programming combines the advantages of both languages and provides strong technical support to the research of satellite mobile communications fading channel. This paper introduces the calculation model of satellite mobile communications fading channel and presents the process of mixed programming. The complex calculation of fading channel is completed and the results are presented.
A New Method for Location Entity Recognition
Authors: Zhong Zhi Nong , Liu Fang Chi , Lei Lin , Jing Ning
Published: September 2013

Location Entity Recognition (LER) is an important part in Named Entity Recognition (NER), and it is a significant research topic in this domain to use the abundant unlabeled corpus to improve recognition performance. A new method combined Active Learning with Self-Training is proposed, which selects samples based on confidence and 2-Gram frequency, and expands the training set by annotating the unlabeled corpus manually and automatically. The experiments reveal that the F-measure of this method is 8% higher than randomized Active Learning while the annotation is only 1/3 of the latter. And using this method, only 5% of characters in the extended training set need to be labeled to acquire a similar performance with complete manual annotation.
The Research on Hybrid Communication Model for Trojan Based on P2P
Authors: Lu Yong Qiang , Yong Fang , Xiang He
Published: September 2013

Direct connection and reflective connection are commonly used in traditional Trojans communication model, which have some significant deficiencies in hiding, anti-tracking, and efficiency. To improve the aspects above in traditional Trojan horse communication model, the author proposed a hybrid communication model based on P2P technology. The model uses P2P intranet penetration protocol to build the channel between the controlled station and the control station, and uses P2P node servers for saving the Trojans status and transferring some data between the controlled and the control. The topology of networks for controller will be very flexible. Using the IP traceback technology will be difficult to track the controllers. Using UDP protocol in the hybrid communication model for data transmission will hide the network status. Control sites can work in distributed mode. By using the model, the hiding-ability, anti-traceability and communication efficiency will be greatly improved.
The Influence of Positional Parameters on the Effect of a Noise-Jammer Based on Broadband Acoustic Propagation Model
Authors: Miao Kang Le , Yang Ri Jie , Xiong Xiong , Han Jian Hui
Published: September 2013

In a long time, the specialists in underwater acoustic countermeasure field were used to get an approximate evaluation of the transmission loss of noise signals by spreading loss equation of spherical wave, which led to results with a low accurateness. Based on normal mode theories and discrete Fourier transformation (DFT), derived the composition and process of the broadband acoustic propagation model. Then the transmission loss could be calculated via this propagation model, which could get a relatively more accurate result. The influence of three key positional parameters, the orientation, distance and depth of the noise-jammer were studied in this paper. The method and conclusions in this paper can provide a reliable foundation for tactical research on noise-jammers.
Three-Dimensional Segmentation Research of CT Abdominal Artery Image Sequence
Authors: Song Xiao Long , Wang Qiao , Jiang Zhen Gang
Published: September 2013

As the role of medical imaging in clinical diagnoses and treatment has been more and more important, CT scan has been applied more widely. How to extract abdominal artery from CT image automatically and accurately has a significant value for abdominal artery disease. Because the medical image is of complexity and diversity, traditional segmentation method cannot complete the segmentation task very well. Therefore, this paper presents a method for extracting abdominal artery from CT images using three-dimensional region growing algorithm combined with image morphology. The experimental results show that the proposed method is an effective way for improving the accuracy of abdominal artery segmentation.
Using Crowdsourcing to Establish the Big Data of the Intelligent Transportation System
Authors: Yan Kai Feng
Published: September 2013

The establishment of big data is completed based on the data captured by automotive electronic systems and cameras on the highway. This kind of crowdsourcing model for data gathering can not only accomplish the accurate collection of enormous data, but also solves the problem of high costs. After the collection of data, the isolated data is linked with each other and shared. In this way, the data will be socialized so as to establish the truly big data. With the big data collected, data center makes an analysis and mining to schedule, monitor and manage the transportation intelligently.
The Pilot Design of MIMO-OFDM System
Authors: Cui Shi Yao , Zhang Yun , Li Nian Qiang
Published: September 2013

There is MAI(multiple access interference) both inside and outside the cell in the multiple access system,which greatly limits the property of the channel estimation.Different approaches of pilot design often lead to different results of channel estimation and directly affect the MSE(mean squared error).But the use of optimal pilot sequences can eliminate the MAI in the cell.This paper presents a approach of optimal pilot design in the MIMO-OFDM system, aiming at the function of MMSE of the LS channel estimation.The approach can eliminate the MAI in the cell and the simulation results reveals that it can truely do that.
To Adapt to Changes in the User Long-Term and Recent Interest of Personalized Recommendation Model
Authors: Chen Hua Yue , Pu Jing
Published: September 2013

With the development and popularization of the information superhighway, people are surrounded by the sea of information. Exponential expansion of Internet information resources, is the vast amounts of information source, its information organization is heterogeneous, diverse, distribution and other features. therefore, can provide users with effective information recommendation, help users to find the valuable information you need the personalized recommendation system won wide attention in the field of Web information retrieval, and also in actual personalization service system has been widely applied in this paper, the personalized services recommendation system architecture to do some research, proposed a distinguishing the user long-term interests and immediate interests provide information to recommend a new model of personalized recommendation.
Time Series Model Based Earning Forecasting
Authors: Jiang Xiang Rong , Cui Ying Ying
Published: September 2013

We propose a procedure to forecast earning of listed companies. It is a modification of method developed for forecasting series with stable seasonal patterns. The new method is motivated by the observations that seasonal patterns, which may be evolving over time and remain relative stability, arise in finance market. The method can be applied to forecast individual observations as well as the end-of-season totals. Empirical study will be conducted with data from finance market to evaluate the performance of the proposed method. The new method is proved more effective than traditional time series models.
Risk Management Strategy of Floorball in Universities
Authors: Guo Xue Qi , Jiang Lei , Qu Hong Jian
Published: September 2013

This paper investigates the development strategy of the floorball in the universi-ties. Floorball, as a type of floor hockey, is an indoor team sport which is becoming more and more popular in Chinese universities. But the cost of this sport is large for the university. So the input of floorball must be suitable. How to decide the quantity of the input to floorball is studied. By the discrete-time singular dy-namic input-output model, the input level of floorball is derived.
Electrodeposition of Lithium in Nonaqueous Solutions and Molten Salts
Authors: Liu M.M. , Gao Dao Lin , Zhang H.Z. , Guo Ya Fei , Yu Xiao Ping , Deng Tian Long
Published: September 2013

In this paper, the method of electrodeposition of lithium both in nonaqueous solutions and molten salts was summarized, and the key problems existed were also carried out. More details for electrochemical deposition of lithium metal by ionic liquids including AlCl3-based, EMI-based, BF4--based, PF6--based, Tf2N--based, N(CN)2--based were discussed, and more works needed for lithium recovery by electrochemical method in the future was also pointed out.
Analysis of Reserve Scale Optimization of Equipment Material for Emergency Operation
Authors: Ge Tao , Gu Ping , Liu Jie , Xu Xue Feng
Published: September 2013

Drawing on reserve and emergency mobilization are import methods to meet the requirements of equipment material for emergency operation. Based on analysis of military effectiveness and economic benefit of material reserve the paper establishes reserve scale decision-making model for emergency operation, further puts forward some measures of reserve scale optimization of equipment material. Conclusions drawn have the application value for equipment material system development of emergency operation.
A Revenue Sharing Model for Closed-Loop Supply Chain of Green Agricultural Products
Authors: Wang Hong Wei , Yan Yu Song , Wei Long
Published: September 2013

Revenue sharing is the key to the steady operation of green agricultural products closed-loop supply chain. In addressing issues of revenue sharing, the previously Shapley value model only took the added value of each partner into consideration, regardless of the differences of the members inputs. So it is necessary to be modified. Considering the input factors, strive factors and risk factors respectively, a comprehensive modified Shapley value model is built for the profits allocation of green agriculture products closed-up supply chain.
The Analysis of South Lake Based on Hedonic Model in Xi'an Influence on the Peripheral Real Estate Value
Authors: Gao Xu Kuo , Zhang Feng
Published: September 2013

With the development of economy and the improvement of peoples living standard, the promoting effect of landscape water on its surrounding real estate industry has become more and more obvious, and attracted the peoples widespread attention. The paper uses the Hedonic model and collects 40 samples based on the south lake surrounding of Xi'an QuJiang dozens of residential area, regarding housing transaction price as the dependent variable, the construction area, the distance to the south lake (hereinafter referred to as distance) and supporting facilities as the independent variable, the logarithmic model was selected for the regression analysis, and get the result that the increment percentage of a house is 0.1% while the average distance close to 1 meter.
On Improving Food Safety Informationalized Management in China
Authors: Zhou Ming You
Published: September 2013

Food safety has a critical bearing on social stability and the public's vital interests. In recent years, the food safety accidents have been occurring frequently, and to strengthening the food quality safety regulation has become the focus of attention. Utilizing information-based means to realize effective and rapid management of food safety has become the inevitable trend of food safety management. This paper discussed informationalized management from the aspects of food safety information disclosure system, food safety information traceability system, food safety credit system, food safety information warning system.
Study on the Preparation of Repaglinide Chitosan Microspheres with Genipin
Authors: Zhang Yue , Shi Xian Xian , Yu Yi Feng , Song Yong Xing
Published: September 2013

In this paper, the repaglinide chitosan microsphere crosslinked with genipin was prepared by emulsification-chemical crosslinking method, and chitosan is used as coating materials, genipin as a crosslinking agent, repaglinide as active agent, span-80 as emulsifier. The prepared microspheres were also characterized by SEM, IR and DSC. The encapsulation efficiency of repaglinide microsphere was 4.4% and the drug loading was 21.9%.
Combinatorial Screening of COX-2 Inhibitors from Chinese Herbs Based on Multiple Structure-Based Pharmacophores
Authors: Zhang Yan Ling , Wang Yuan Ming , Qiao Yan Jiang
Published: September 2013

Ten structure-based pharmacophore models of Cyclooxygenase 2 (COX-2) inhibitors were generated by LigandScout based on COX-2 inhibitor complexes from the Protein Data Bank (PDB). The potential COX-2 inhibitors were identified from traditional Chinese medicine with the method of combinatorial screening with ten models. Based on the screening results of MDDR and the metrics of E, A% and comprehensive appraisal index (CAI), the threshold of hit frequency of molecules was defined and used to identify the active molecules from Chinese herbs. The molecules hit by not less than six pharmacophore models were taken as the screening objects of COX-2 inhibitor, and 1103 molecules were obtained.
Mechanical and Thermal Properties Biodegradable Microcellular Foams Based on Polylactide and Polycaprolactone
Authors: Shen Teng Fei , Sun Ying Juan
Published: September 2013

In this work, the producing of a series of biodegradable polylactide (PLA)/polycaprolactone (PCL) microcellular foams by rapid solvent casting method was investigated and discussed. Scanning electron microscopy (SEM) showed the average pore size in the structure was around 7 μm and the final microstructure was a combination of open and closed cells. The effect of PCL segments added on the mechanical and thermal behaviors was studied. According to the results, PLA/PCL biomaterial had lower glass transition temperature (Tg) in comparison with neat PLA polymer. In addition, the tensile strength and elastic modulus became poor when PCL added in. For obtained better mechanical and thermal properties, EC-blocked polyisocyanate (EC-bp), which was synthesized from reaction of toluene 2, 4-diisocyanate with dimethylol propionic acid and trimethylolpropane followed by addition of ethyl cellosolve (EC), were introduced. It was found that the tensile strength and elastic modulus were significantly increased by addition of EC-bp, which can be explained by coupling effect occurred between PLA and PCL.
Study on the Properties of Carboxyl Functionalized Kapok Fiber on Adsorption of Mercury (II)
Authors: Pan Qing Shan , Li Dai Qi , Li Jian Qiang , Liu Wei , Ma Mei Gui , Yan He Ping , Zhou Bo , Wang Bao Sen , Shi Ling , Xu Shi Juan
Published: September 2013

Modified kapok fiber (MKF) was prepared by reacting with succinic anhydride after microwave pretreatment. The preparing conditions (microwave power and pretreatment time) were optimized in this study. And the effects of MKF dosage, PH and contact time on the removal of Hg (II) ion from aqueous solution was studied, the results indicated that when the initial Hg (II) ion concentration was 100mg/L, the adsorption capacity of MKF was high effective with the MKF dose was 5g/L , PH was 4.0 and the contact time was 2h,the equilibrium adsorption capacity of MKF was 19.21 mg/g and the removal rate of Hg (II) ion was 97.13%. All the results indicated that the MKF was a effective adsorbent for removal of Hg (II) ion.
The Effect of LZB-GC Antibacterial Agent on Mechanics and Friction Properties of Dental Composite Resin
Authors: Che Xiao Qiang , Zhang Song Ying , Chen Yun Ping , Liu Bin
Published: September 2013

The antibacterial agent (LZB-GC) was added to composite resin materials with varied ratio (0.5%, 1%, 1.5%, and 2%) by mechanical and ultrasonic methods. The effects of different contents of the antibacterial agent on the mechanical and fibration properties of the composite resin were measured. The results showed 1.5% group acquired the best flexural strength, and the surface hardness decreased while the friction coefficient increased with improving the antibacterial agent content.
Sample Description of Diabetic Rats Treated with the Drug Pair of Astragalus and Chinese Yam by Using Multivariated Data Mapping Methods of R
Authors: Wu Li Rong , Shi Zhong Feng , Jin Xiao Bao , Gao Wei Dong , Zhu Jia Yong
Published: September 2013

The drug pair ofAstragalusandChinese yamis an effective Traditional Chinese Medicine (TCM) formula treating diabetes, but its mechanism of action is not explicit. In order to reveal its antidiabetic mechanism, we carried out metabonomics study on diabetic rats treated with drug pair ofAstragalusandChinese yam. Data obtained by using UPLC-Q-TOF/MS method were classified into five groups (normal control group, Model Group,AstragalusGroup,Chinese yamGroup and the drug pair ofAstragalusandChinese yamGroup). R software was used for Principal Component Analysis (PCA), Sammon mapping, Kruskal-Wallis mapping (isoMDS) and Independent Component Analysis (ICA). The exported LC/MS data were processed by R. PCA, isoMDS and ICA function were used to perform preliminary metabonomics analysis of diabetic rata treated with drug pair ofAstragalusandChinese yam. These results indicated the capacity of multivariate data mapping methods in metabonomics data.
Spectral Properties and Rheology Behavior of Colorless Fluorescent Inks Used for Screen Printing
Authors: Luo Shi Yong , Qin Rui Rui , Xu Wen Cai , Huang Xiao Jun , Zhang Xin Lin
Published: September 2013

Colorless fluorescent ink has certain anti-counterfeiting function. In this paper, fluorescence curve and spectral properties of the fluorescent ink with colors of fluorescent red, fluorescent blue and fluorescent green used for screen printing are tested. Besides, rheological properties of fluorescent inks such as viscosity and thixotropic behavior are shown in the paper.
Kinetic Studies on the Polymerization of Dicyclohexylmethylmethane-4,4'-Diisocyanate with Polyoxytetramethylene Diol
Authors: Wang Jian Cheng
Published: September 2013

Dicyclohexylmethylmethane-4,4'-diisocyanate is used to react with polyoxytetramethylene diol at different temperatures. N,N-Dimethyl acetamide is used as solvent.In situFT-IR is used to monitor the reaction to work out rate constant, Arrhenius equation and Eyring equation. The polymerization has been found to be a second order reaction, and the rate constant increases with the rise of temperature. Activation energy (Ea), activation enthalpy (ΔH) and activation entropy (ΔS) for the polymerization are respectively calculated out, which are very useful to reveal the reaction mechanism.
Study on the Effect of Outer Frame on Seismic Performance of Improved Multi-Ribbed Slab Structure
Authors: Qian Kun , Xia Tian , Zhang Jie , Yuan Quan
Published: September 2013

This paper confirmed the calculation model of improved multi-ribbed slab structure and the stress relationship among three seismic fortification lines, offered the possibility of distributing earthquake action reasonably, provided the basis for optimal design. Comparing the similarities and differences between the improved multi-ribbed slab structure and energy-consumption braced frame; characteristic parameters of restoring force in the third seismic fortification line, outer frame, would be got by design and be adjusted. This paper analyzed the third seismic fortification line by numerical simulation and example analysis, the variation range of performance of the third seismic fortification line is got, this range can be adjusted by changing the influencing factors of three seismic fortification lines. The reasonable destruction mode of three seismic fortification lines could be achieved, namely the control design of three seismic fortification lines could be achieved.
Research on the Aerodynamic Measures Impact on Flutter Stability of Steel Truss Suspension Bridge
Authors: Bai Hua , Huang Sen Hua
Published: September 2013

The flutter stability of the steel truss suspension bridge is hard to reach the requirement of the wind resisting stability when lacks the torsional stiffness. This paper discusses the influence of aerodynamic measure combination, such as central stabilizer, air director enclosed anti-collision bar and so on, towards the flutter stability of steel truss through the wind tunnel experiment of the bridge of Liu Jia gorge. The result shows: the effect of using both the upper and lower stabilized plate is better than separated used it. when sectionalized dispose upper stabilized plate, the flutter critical wind speed of attack angle will decrease rapidly. Outlaying the horizontal guide plate is better than internally installed; The flutter stability of different attack angle tend to be balanced by widening the horizontal guide plate. The anti-collision bar can be functionalized as the central stabilizer by heightening and enclosing, and effectively increase the critical wind speed of different attack angles of the high truss suspension bridge.
Remnant Life Prediction of Service-Exposed 12Cr1MoV Superheater Tube in Power Plant
Authors: Zhu Xin Wei , Cheng Hong Hui , Shen Mei Hua , Pan Jin Ping
Published: September 2013

Tensile test at ambient temperature, tensile test at high temperature and high temperature tensile creep test were carried out before remnant life prediction. According to the high temperature tensile creep test data, the relationship between working stress, working temperature and rupture life was obtained by MATLAB surface fitting tool. In order to obtain the temperature field and stress field of the superheater tube, ANSYS software was used. Then, the remnant life of the superheater tube was predicted by the extrapolating method and the relationship between working stress, working temperature and rupture life.
The Effect of Magnetron Co-Sputtering Parameters on the Microhardness of TiZrN Thin Films
Authors: Zhao Xin , Qin Wei , Zhao Guo Dong
Published: September 2013

TiZrN thin films have been prepared on high speed steel by using magnetron sputtering. Doping amounts of Zr were adjusted by changing the sputtering time of the Zr target. X-ray diffraction analyses show that TiZrN coatings consist of mixed crystals of TiN, TiZrN phases. The film microhardness first increases and then decreases with the increasing of Zr doping amount. With the same Zr doping amount, the microhardness of the samples will improve with the increasing of doping times.
A New Ti-Zr-Cu-Si Amorphous Alloy with Excellent Biocompatibility
Authors: Suo Zhong Yuan , Chen Jian Jun , Song Yan Ling , Qiu Ke Qiang
Published: September 2013

A new Ti-based amorphous alloy Ti35Zr21Cu40Si4 with about 80 μm thickness and 5~8 mm width was fabricated by melt spinning method. The phase structure and thermal stabilities of the Ti35Zr21Cu40Si4 amorphous alloy were investigated by the X-ray diffraction (XRD) and differential scanning calorimetry (DSC), respectively. The Ti35Zr21Cu40Si4 amorphous alloy was cultivated in the simulate body fluid (SBF) for 15 days. And the blood compatibility was evaluated by dynamic clotting time and hemolysis rate test. The Ti35Zr21Cu40Si4 alloy exhibits fully amorphous phase and high thermal stability with a supercooled liquid region (ΔTx) of 80K. The Ca phosphates depositions on alloy surfaces were gained after 15 days. Moreover, n (Ca)/n (P) atom ratio of the deposition is about 1.65/1, which approaches to that of human bone 1.66/1, suggesting that the Ti35Zr21Cu40Si4 amorphous alloy is with an excellent biocompatibility. The Ti35Zr21Cu40Si4 amorphous ribbon has lower hemolysis ratio of 0.562%, which can reduce wrecking degree of erythrocytes, compared with medical standards of the hemolysis rate (less than 5%). These are favorable for application to biomaterials.
Quantitative Analysis of Intermetallic Phase in 850°C Aging 2205 Duplex Stainless Steel
Authors: Liu Wei , Zhu Na Qiong , He Yan Lin , Li Lin
Published: September 2013

The precipitates in 850°C aging 2205 Duplex stainless steel were extracted by the method of carbon extraction replicas. The method makes precipitates disperse uniformly and the contrast between precipitates and matrix distinct. TEM(Transmission Electron Microscope), EDS(Energy Dispersive Spectrometer) and SEM (Scanning Electron Microscope) were applied for the observation of microstructure. The SEM micrographs were used for intermetallic size statistic, which revealed that the sizes of intermetallic increased with aging time.
Analysis of Influence Factors in Step Heating Thermography to Composite Materials
Authors: Tang Tao , Shan Xue Jun , Xu Wei Chang , Wang De Sheng
Published: September 2013

In process of Thermal Wave NDT, as a result of influence from kinds of factors, such as noise, intensity of heating signal, defect dimension, it is very difficult to get good testing data. In order to resolve it, the method of numerical computing was taken to simulate the process of heat conduction in sample. At the simulating process, some valuable phenomenon were found, and as follows: When time of heating time was enough, temperature changing at surface would be steady, and rate of changes could be approximately considered as a constant; the biggest contrast would delay, as depth and diameter increased; the greater intensity of heating signal was, the quicker change of contrast was; and it was more important to ascertain the best testing time when the biggest contrast occurred. And these were valuable to acquire more precise testing result.
A Study of the Earthquake-Resistance Performance of Frame Structures with Different Types of Stairs
Authors: Ran Yu , Kou Wen Fei , Xing Guo Hua
Published: September 2013

This paper uses time-history analysis method to consider the effect of 3 kinds of seismic waves by means of finite element software Ansys, analyse earthquake response of 5 kinds of models, compares effect of structural performance of frame structures with different types of stairs. The results show that different types of stairs diversely affects period, stiffness, mode of vibration, mechanical performance, etc, after consideration of stairs in calculating. Although types of stairs different, it shows mainly that stairs make much larger contribution for stiffness parallelled to stairs, less contribution for stiffness perpendicular to stairs, each layer just affects stiffness this layer. It is not simple to consider different types of stairs as general supports.
Numerical Simulation of Filling and Solidification in Sand Casting by Procast
Authors: Han Dong Dong , Wang Cheng Jun , Chang Juan , Chen Lei , Xie Huai Bei
Published: September 2013

At present, pulley produced in China has been able to meet the demand of domestic and international markets. But there are many problem of the pulley industry in our country, such as too many production enterprises and the low level of export products. And as components of drive system are light weight and raw material price of pulley casting are rising, manufacturing requirements of the pulley are also more and more high. Aiming at the casting defects of pulley that enterprise current product, pulley casting blank model of common material HT250 be made by three-dimension software, numerical simulation of filling and solidification process for pulley sand casting by the casting simulation software Procast, the size and location of the various casting defects were forecasted and analyzed, reflecting the pulley filling and solidification process of the actual situation, due to the thicker pulley rim and less heat dissipation, position of shrinkage is close to the middle of rim [, a method of eliminating defects is proposed to realize sequential solidification, and thus to minimize porosity shrinkage and improve casting performance and reduce casting time and reduce production costs.
Performance Forecast of Solar Spectrum Selective Absorbing Coating Based on RBF Neural Network
Authors: Liu Han Wu , Ping Shao Bo , Zhang Feng , Zhang Xin Long
Published: September 2013

The paper researches on the coating performance prepared by sputtering stainless steel particles to Cu substrate, analyzes the effect of the six magnetron sputtering process parameters on absorption rate, such as Ar pressure, oxygen flow, sputtering vacuum degree, sputtering time, target voltage and target current with the artificial neural network technology, and forecasts the performance of the coating prepared by specific process parameters. The results show that during the process of magnetron sputtering when Ar pressure is within the range of 0.2 ~ 0.5 Pa, the oxygen flow is within the range of 0 ~ 20 sccm, and the target current is within the range of 380~ 430 A, the higher the sputtering vacuum degree and the target voltage, the superior the performance of the coating can be obtained. It is also found that the sputtering time has little effect on the coating performance, in the actual preparation process, on the condition that the performance can be guaranteed, the sputtering time should be as short as possible.
Spin Dependent Pump Probe Reflection Spectroscopy in Bulk InP Crystal
Authors: Ma Hong , Leng Jian Cai
Published: September 2013

The change of the reflectivity signal is modeled by taking into account of the spin dependent band filling and band gap renormalization effects with the carriers density from 5×1016/cm3to 2×1017/cm3. The calculated results show the reflectivity signal is a very sensitive function of the carrier density. The most interesting feature is that the reflectivity change from photo-bleaching into photo-absorption enhancement is observed with increasing pump photon energy. The theoretical predictions obtained in this work are consistent with the corresponding experiments.
Dynamic Coordinated Shifting Control for Hybrid Electric Vehicle
Authors: Wang Jun , Wang Qing Nian , Zeng Xiao Hua , Li Chuan , Liu Song Shan
Published: September 2013

Building a dynamic coordinated shifting control model of hybrid electric bus, analyzing of dynamic coordinated shifting process to achieve good perfomance by coordinated control of main motor and engine, clutch control, active synchronous motor, automatic transmission and so on. This article provides motor torque compensation algorithm to achieve no torque interrupted and motor active synchronization algorithm to reduce the shift time. From the results show that the control strategy realizes no torque interrupted and greatly reduces the jerking to achieve the smooth operation in the shifting process.
Design of Adaptive Cruise Control Systems Based on Quadratic Boundedness Theory
Authors: Gao Zhen Hai , Yan Wei , Jiang Zhi Yan , Hu Zhen Cheng , Zhao Hui
Published: September 2013

A new decision algorithm for ACC systems is proposed. Feasible driving set is defined based on state and control constraints, which represent driver behavior features. And based on the analysis of collected driving data, a second-order range policy is selected to approach real driver behavior. Under dynamic output feedback control framework, the decision algorithm has been developed based on quadratic boundedness theory and given in terms of linear matrix inequalities. Performance of the proposed algorithm is verified by Simulink and Carsim co-simulation.
Analysis of External Gear Pump Failure
Authors: Zhang Wen Guang , Lin Guo Min , Shang Miao , Chen Qian
Published: September 2013

Several typical failures of external gear pump are presented. The reasons of the pump failure are analyzed in detail. Solutions of the failure are proposed. In order to improve the efficiency of pumps maintenance and reparation, a new kind of tool is mentioned which could predict the life of gear pump before failure occurred.
Analysis of Mechanical Characteristic of Three-Phase Asynchronous Motor
Authors: Shang Miao , Lin Guo Min , Zhang Wen Guang , Ye Jiao Jiao
Published: September 2013

The functional relationship is analyzed between three-phase asynchronous motor electromagnetic torque and some factors; Mechanical characteristic curve of motor performance is drawn; The inherent mechanical properties and human mechanical properties are explored in a specific application. Facts prove that mechanical characteristic analysis of three-phase asynchronous motors, to reduce the failure rate of the three-phase induction motor, to improve the running capacity and production efficiency are important.
Miniature Electric Touring Car Chassis Structure Analysis and Optimization
Authors: Liu Wei Min , Lu Chun Guang , Deng Hao
Published: September 2013

We finished the miniature electric touring car chassis structure finite element analysis. Mainly for the miniature electric touring car chassis uniform rectilinear driving condition, the distribution of deformation and stress analysis, According to the above data to optimize the chassis structure, and verified the rationality.
Trajectory Tracking of Underactuated Manipulator Using Fuzzy Method
Authors: Xia Qi Xiao , Yu Yue Qing , Yu Zhang
Published: September 2013

Control of Underactuate manipulator is a challenge. A fuzzy control method is presented to control a three DOFs underactuated manipulator with the last joint passive. Using the redundancy DOF, the base joint was assigned a motion plan. The second active joint is planed and controlled to compose the base joint dynamics to drive the last passive joint moving. So, the motion error of the joint 1 neednt be cared about. The fuzzy controller was designed based on measures errors between the tracked trajectory and desired trajectory. Gaussian membership functions are used for fuzzification of the error inputs and defuzzification of reasoning results. Numerical simulation on tracking of circle arc was implemented for verification of the presented fuzzy controller.
The Comparison of Different Preparation Methods of Catalysts for Furfural Hydrogenization to 2 - Methyl Furan
Authors: Li Zeng Xin , Han Tong Zhu , Guo Wen Xia , Wang Guo Ming
Published: September 2013

Three different kinds of preparation methods were contrasted and studied to furfural hydrogenation catalyst for 2 - methyl furan production.Cu, Cr-based catalysts are prepared by three different methods, and the differences were also studied in the structure of these catalysts and their catalytic properties on furfural hydrogenation reaction. From the XRD patterns of samples prepared by different methods of Cu-Cr/γ-Al2O3, The results show that: the metal particle size is:the ordinary impregnation method > coprecipitation > solvated metal atom impregnation method. From the SEM photographs by samples, distribution uniformity of the catalyst ion surface: ordinary impregnation method > coprecipitation > solvated metal atom impregnation method. The reduction degree of the metal: solvated metal atom impregnation ordinary impregnation coprecipitation method. Furfural hydrogenation experimental results show that the order of catalytic activity is solvated metal atom > general impregnation coprecipitation; the selectivity order of 2 - methyl furan: coprecipitation> ordinary impregnation method solvated metal atom impregnation method.
Modulation Waveform Cycle Normalization Based Unipolar SPWM Controller
Authors: Jiang Chao , Hu Yue Li , Zhang Ke Ke , Cao Yang
Published: September 2013

The thesis mainly proposed a novel design method for Sinusoidal Pulse Width Modulation (SPWM) controller based on modulation waveform cycle normalization. T is the period of sinusoidal modulation waveform, and T/n is the cycle of triangular carrier. Shift registers and adders of SPWM controller were designed to translate the 2n numerical value for SPWM waveform on-off switching points, which were calculated offline, to control the level of the outpout SPWM waveform,which is the key point of modulation waveform cycle normalization. In the thesis RTL function simulation verification by ModelSim and testing for FPGA have been achieved successfully. The results show that the novel SPWM controller is reliable, which has practical significance.
The Design and Finite Element Analysis of the Installation to Smash Banana Stem
Authors: Zheng Kan , Zhang Xi Rui , Liang Dong
Published: September 2013

Aiming at the huge waste, low utilization of banana stem fiber and the environment pollution caused by it, the author redesign one of the main components of the crumple machine--the crushing device, build the device's 3D solid modeling with the Solidworks software, based on the finite element modelSolidworks Simulation, make the finite element analysis and discuss of the crushing blade under the proper operating condition .The design is safe and reliable according to the analysis, and would be great help to promote the comprehensive utilization of bananas stem fiber in the main producing areas and raise the economic benefits of banana cultivation.
Preparation of TiO2-Supported Activated Carbon and its Application in Papermaking Wastewater
Authors: Ou-Yang Zhuang , Xu Hai Lin , Xiong Chao , Huang Wen Shen , Xie Da Ming , Luo Bin , Lv Bin
Published: September 2013

Activated carbon supported nanoTiO2photocatalyst material (TiO2/AC) was prepared with activated carbon (AC) as the carrier and sodium carboxyl methyl cellulose (CMC) as the binder. And the TiO2/AC was characterized by XRD. Then, the optimal experimental conditions was studied and the removal percentage of CODCrfrom papermaking wastewater could reach 73.22% at the optimal conditions. And the CODCrof the effluent was 90 mg/L, meeting the requirements of China national discharge standard. Furthermore, the recycle experiments showed that the TiO2/AC had a relatively high catalytic activity and stability.
The Finite Element Simulation of Disc Cutter of Different Diameter Breaking Rock
Authors: Zhang An Ning , Zhu Zhao Feng , Zhu Feng
Published: September 2013

In this paper, finite element software ANSYS is used to simulate a process of disc cutters of different diameter breaking rock, get the curves of the load of disc cutter of different diameter breaking rock and the curves of the stress exerting on the cutters when the disc cutters cutting different depth. According to the rock breaking mechanism of disc cutter, and established five kinds of disc cutter of different diameter broken rock finite element model, and the numerical simulation was carried out. The loads of disc cutters of different diameter breaking rock and the stress exerting on the cutters are different when the disc cutters cutting different depths. According to the result of the analysis, draw the curve graph of the load of disc cutter breaking rock and the stress exerting on the cutters when the disc cutters of different diameter cutting different depth. According to the curve diagram, the load of disc cutter of different diameter cutting a certain depth and the stress of exerting on the disc cutters can be gotten. The simulative result is instructive for improving the design of disc cutter parameters and improving the development efficiency.
The Design and Analysis of Bracket of Scraper Part of Coal Mine Underground Horizontal Extension Transfer Machine Based on Solid Works
Authors: Mao Ping Huai , Ding Li , Li Jing Xi
Published: September 2013

The paper aims to design a kind of bracket of scraper part of coal mine underground horizontal extension Transfer Machine perfectly, based on Solid Works. And we would like to perform numerical simulation for the bracket, furthermore to optimize the transect parameters and achieve that to reduce the weight of the bracket. At last, through optimization design, we prefer to reduce 4.5% in Von Misses press and 15% in weight. In this way, we can offer a useful reference to design the bracket of scraper part of coal mine underground horizontal extension Transfer Machine.
Heat Treatment Technology and Property Study on 40Cr of Shearer Picks Body
Authors: Zhang Chun Hong , Zhang Ning , Wang Yue
Published: September 2013

Cutting tooth especially due to the poor quality of the shearer brazing, caused enormous economic losses each year in our country, which caused great pick consumption and delayed hours, and then resulting in reduced efficiency. The tooth body wear of the whole shearer picks accounts for half of its overall failure. In this experiment, the heat treatment which included heating temperature, soaking time, and cooling, etc. was designed by service conditions and performance requirements of the body material 40Cr. The change of microstrcture and mechanical property was analysed by quenching and tempering treatment, thus prolong the service life of shearer picks by improving the comprehensive performance of the tooth body material.
Research on Running Ride Comfort of the Multifunctional Harvester
Authors: Shu Qing , Zhu Jie
Published: September 2013

Based on the structural analysis of the multifunctional harvester, dynamical vibration equation with 5-degree of freedom is built by Lagrange method through rational simplification. Considering road surface random excitation drive and pulse excitation, simulation analysis of the running ride comfort is carried on to the complete machine model of vibration. Running ride comfort of the multifunctional harvester is predicted or evaluated, providing the basis for the design of adding the shock mitigation system to the multifunctional harvester.
Application and Analysis of Magnetic Track Brake
Authors: Pei Yu Chun
Published: September 2013

Magnetic track brake is a new kind of rail transit vehicle braking mode, this paper introduces its composition, structure, working principle and braking control methods, and analyzes its application.
Manned Cableway Tower Operating Mode of the Finite Element Analysis
Authors: Gong Jian Chun , Zhou Deng Rong
Published: September 2013

Make a tower calculation model according to the requirement, this paper using i-deas software the finite element analysis on it. According to given all kinds of tower under the condition of displacement field, stress field, the analysis process of tower adopts hexahedral and tetrahedral entity processing units mapping, analysis of the results using i-deas software in the post-processing module for data processing and graphical display
The Depth Image Restoring Based on Harris Corner Detection
Authors: Dong Ao Shuang , Liu Xiao
Published: September 2013

Obtaining the depth image is the foundation of the research on other direction of Kinect. When to obtain the depth image information in a Kinect, it can t obtain the depth image accurately if there is a shelter in front of the body, and then the recognition and the restoration of the skeleton will become very difficult. This paper uses the method of Harris corner detection to detect shelter corner which is used to detect the range of shelter and restore the depth image information. But different from the traditional way, this paper uses the depth data values in the corner detection instead of the gray date values. After detecting corner, a series of actions of depth value substitution and smoothing will be done to repair occluded depth image.