bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of Aging Process on the Crystalline Structure and Electrochemical Properties of LiNi0.8Co0.1Mn0.1O2 Cathode Material
Authors: Liu Liang Bin , Zheng Lu , Wang Jian Hua , Guo Yu Zhong
Published: April 2014

Ni0.8Co0.1Mn0.1(OH)2 precursors prepared by co-precipitation method were served to synthesize LiNi0.8Co0.1Mn0.102 cathode materials by sintering with LiOH·H2O at high temperature. It is shown from XRD analysis and electrochemical measurements that these precursors synthesized at different aging time are all composed of two phases, α-Ni (OH)2 and β-Ni (OH)2.With aging process lasting longer,relatively content of α-Ni (OH)2 in precursors increase , peak intensity ratios of I(003)/I(104) in LiNi0.8Co0.1Mn0.102 get larger, the more complete of layer structure, the lower of Li+/Ni2+cation mixing. Results indicate that the existence and content increase of α-Ni (OH)2 phase with aging process lasting can inhibit the cation mixing efficaciously. LiNi0.8Co0.1Mn0.102 obtained from precursor aged 12h has a good cyclic performance, capacity retention rate reaches 92.8% after 30 cycles.
Comprehensive Evaluation of Implementation Effect on Later-Period Supportive Policy of Reservoir Resettlement Based on ANFIS
Authors: Xu Xin , Wang Xiao Yi , Wang Zhao Yang , Long Yu Hang , Xu Suo Jun
Published: April 2014

According to engineering features of later-period supportive policy on reservoir resettlement, Economic evaluation index system of implementation effect on later-period supportive policy of reservoir resettlement is built to assess the implementation result of reservoir resettlement policy effectively in recent years. Considering the complexity of the evaluation index and the nonlinear characteristics of evaluation process, it is built that the comprehensive evaluation model of implementation effect on later-period supportive policy of reservoir resettlement based on ANFIS(Fuzzy artificial neural network) to provide the decision-making reference for implementation and improvement of later-period supportive policy of reservoir resettlement.
Influence of Fiber Type on Road Performance of Stone Mastic Asphalt
Authors: Wan Chen Guang , Wang Qian Tao , Ma Bao Fu , Zhang Yuan
Published: April 2014

Stone Matrix Asphalt (SMA) is a gap-graded mix that is gaining popularity worldwide. Various types of fibers are used as additions in SMA asphalt mixture. However, there is not sufficient information available for the selection of different fibers with regard to different applications of SMA pavement. In this paper, SMA-13 using three different fibers: lignin fiber, polyester fiber and basalt mineral fiber, is used as an example. Based on the Marshall test, Schellenberg Binder Drainage test, Cantabro test, Residential stability test, Freezethaw cycle test, Rutting test and Bending test of small beam of the mixtures, the influences of different fibers on road performance of SMA mixture were investigated. The results show that SMA-13 mixtures using mineral fibers exhibit optimal high temperature and low temperature stability; while SMA mixtures using lignin fibers exhibit optimal water stability.
Prediction Method of Lithium Battery's State of Charge Based on No Trace of Calman Filter
Authors: Cui Zhen Ping , Qin Yong Xin , Li Hao
Published: April 2014

The Thevenin equivalent circuit model is established for single lithium battery,current and voltage data to identify the parameters of the equivalent circuit is obtained by the discharge experiment, and the open circuit voltage and charge state relationship curve was obtained by curve fitting.On this basis, design the extended Kalman filter algorithm and unscented Kalman filter algorithm on the lithium battery state of charge, then use Matlab/Simulik simulation, the results of the state prediction of the two different algorithms are compared. The analysis results show that two kinds of algorithm are effective for single lithium battery state of charge estimation, and no trace of Calman filter algorithm can effectively solve the the problem of accuracy is not high of the extended Calman filter ,which due to the linear approximation.
Effectiveness of Vaporous Hydrogen Peroxide for the Decontamination of Bacillus atrophaeus in Confined Space
Authors: Liang Ting , Zhou Kan , Gu Jin , Yan Rui , Ji Zhuang Zhou
Published: April 2014

The main objective of this study was to make out the decontamination effects of bacillus atrophaeus in different locations by Vaporous Hydrogen Peroxide decontamination equipment which was designed independently. Bacillus atrophaeus were in different locations of the room, the room volume is 67m3. Then the Vaporous Hydrogen Peroxide (VHP) decontamination equipment was opened to sterilize the room. After the sterilization, based on the Technical Standard For disinfection, the biological indicators including bacillus atrophaeus were incubated at37 °C for 48 hr,resultant colonies were enumerated. The BI results showed that along with the increase of distance between VHP decontamination equipment and the BI, decontamination time gradually extended. When the distance were 2m, 4m and 6m, the decontamination time were 15min, 30min and 30min. When the BI was put in the room corner, the decontamination time was 60min. From this paper,it can be determined that the VHP technology is a valid approach to the sterilization of interior space.
Influence of Heat Treatment Parameters on Mechanical Properties and Crashworthiness of Aluminum Crash Box
Authors: Zhou Jia , Wang Guang Yao , Li Yang , Wan Xin Ming
Published: April 2014

The influence of heat treatment parameters, i.e. solution temperature, solution time, aging temperature and aging treatment on the mechanical properties and crashworthiness of crash boxes produced with 6101 aluminum alloy were studied. The optimal heat treatment processing was obtained as follows: 510°C×45min+175°C×7h. The crash boxes were treated under different heat treatments, i.e. T1 temper,T4 temper and T6 temper and then compressed under static pressure. The results indicate that the energy absorption of crash box can after T6 treatment is significantly higher than the samples under T1temper and T4 temper, which have similar energy absorption. The peak force of static pressure crash boxes treated under T6 temper is obviously higher than the other two tempers.
Experimental Study Oviductus ranae for the Change of α-SMA and TGF-β in Hepatic Fibrosis Rat Liver
Authors: Li Yan , Li Xiao Ou , Hao Feng , Zhang Lei , Liu Lei , Hu Xin Hong
Published: April 2014

To evaluate the control effect of Oviductus ranae on liver fibrosis in rats, and the change of TGF-β and α-SMA in liver of. To explore the mechanism of Oviductus ranae decoction on liver fibrosis. Methods Wistar female rats were randomly divided into a blank control group, model control group, colchicines group, Oviductus ranae group. Using the CCl4composite approach to make the rat modle. The course of treat-mart was 12 weeks.After treatment,All the rats was killed,and the materials and blood was taken,and to detect biochemical test of liver function after eight weeks. Investigating the variation of liver histology. Meanwhile detecting protein expression of TGF-β and α-SMA and by immunehistochemical method.Result The general condition of rats in all treatment groups are worse than the blank group,but better than the model group. And the rats in the model group were all occurred in liver fibrosis,and liver fibrosis is the most serious.In a normal rat liver tissue of TGF-β and α-SMA were significantly lower in model group and each treatment group, and there were significant differences, and the TGF-β and α-SMA in expression of liver tissue in model rats of TGF-β and α-SMA the highest. Conclusion: Oviductus ranae can effectively improve liver fibrosis rats induced by CC14liver function.Oviductus ranae can reduce the expression of TGF-β1in liver tissue of hepatic fibrosis rats induced by CCl4in. This may be one of the mechanisms of Oviductus ranae in prevention and treatment of liver fibrosis. Even though both increased expression of TGF-β and α-SMA expression, is able to determine TGF-β and α-SMA for the intervention of liver TGF-β signal transduction pathway in liver fibrosis.
Indigenous Microbial Active Formula System and Field Application
Authors: Lin Sha , Wu Gang , Zhang Shuang Yan , Xie Juan , Xiao Yun , Guo Su Zhen , Su Na , An Shu Kai
Published: April 2014

In order to utilize the beneficial Indigenous Microbial in objective reservoir, active formula systems with various nutriment components were investigated[. The results of performance evaluation showed that the activation, emulsification, viscosity break, and oil displacement performance of nutritional formula system were approved. Based on the field verification, the beneficial Indigenous Microbial in produced fluid of post treatment well array was activated, oil quality was improved, displacement efficiency was advanced, and oil production was increased.
Optimization and Application of Liposome-Mediated Transfection of pEGFP-N1 in FRT Cells
Authors: Xiang Guo Yan , Zhang Yun Qiao , Zang Yu Xuan , Zhu Hang Fei , Zhang Zhong Xin , Zhou Li Ting , Tong Zhi Qiang , Li Yan , Hao Feng
Published: April 2014

This study aimed to optimize liposome-mediatedtransfection conditions of pEGFP-N1 in FRT cells and to investigatewhether the optimized conditions were the optimal liposome-mediated transfectionconditions of the other vectors in FRT cells or not. The pEGFP-N1 were transfectedinto FRT cells, with the conditions of different cell confluence、ratio and quantity of vectors / liposome. At the sametime, pEGFP-N1-Aquaporin1、pEGFP-N1-Aquaporin3and pEGFP-N1-Aquaporin4 were transfected into FRT cells, respectively, withconditions of being same as pEGFP-N1. The inverted fluorescent microscopy was used to observe cytotoxicity and the expressionof EGFP in FRT cells. Transfection efficiency was measured by flow cytometry and cell viability was measured by trypanblue exclusion. The results showed that the expression of EGFP reachedthe highest at 36h after transfection. Flow cytometryand trypan blue exclusion tests showed when the cell confluence was 70%、the ratio and quantity of vectors / liposome was 1: 4(2.0ng: 8.0μL), pEGFP-N1 got higher transfection efficiency (46.97±0.32) % andcell viability (63.47±0.32) %. Under the same conditions, AQP1、AQP3 and AQP4 got the highest transfection efficiency and higher cell viability, too. The study would provide anexperimental evidence for efficient transfection of the other vectors in FRT cells.
Study of the Protective Effect of Schizandra chinensis Polysaccharide on Oxidative Damage of Mouse Spermatozoa In Vitro
Authors: Zhao Dong Hai , Zhang Yan , Yuan Zhen , Li Meng Lu , Luo Wei Yun , Han Xiao Pei
Published: April 2014

The aim of the study: This study was conducted to evaluate oxidative stress damage model caused by reactive oxygen species production was prepared by heating injury and protective effect of SCP on spermatozoa membrane structure and function in vitro. Materials and methods: mouse eupyrene sperm suspensions were prepared and were randomly divided into six groups. The control group was maintained with PBS. The positive medicine group was received PBS contained vitamin E (0.25 mg /ml) .The SCP group was then given SCP (0.2, 0.4 and 0.8 mg /ml) respectively. All the groups except control group were treated with using heat stress injury. Degree of injury of spermatozoa membrane lipid peroxidation was detected. Results: The vitality of total superoxide dismutase (T-SOD) was increased and the quality of malondialdehyde (MDA) was decreased in different degree with each concentration of SCP. The protective effect of 0.4 mg /ml and 0.8 mg /ml SCP on spermatozoa membrane was obviously surpass to positive medicine group. These findings indicate that SCP could be potentially useful for the treatment of oxidative stress damage in spermatozoa.
Cognitive Behavior Therapy Ameliorates Non-Motor Symptoms in Parkinson's Disease
Authors: Wang Chun Yan , Li Di , Yu Shu Kun , Wang Ming Hong , Guan Qing , Li Chun Hui
Published: April 2014

Non-motor symptoms (NMS) occur commonly in PD patients. The NMS is associated with the deterioration of life quality in Parkinsons disease (PD), even exceeding the effects of the motor disorder. To determine the effects of cognitive behavior therapy (CBT) on NMS in PD, fifty-five PD individuals with CBT intervention were matched for forty-eight control PD participants. NMS of all PD patients including depressive symptoms, sleep quality, cognitive function and physical and mental health-related quality of life were respectively assessed. Results indicate that CBT ameliorates NMS of PD patients, and that is significantly related with the decreases of serum inflammatory cytokines levels.
Influence of Ni/Cr Substitution for Mn on Crystal Structure and Electrochemical Performance of LiMn2O4 Cathode Materials
Authors: Luo Fei , Zhang Lin , Wang Jian Hua , Guo Yu Zhong
Published: April 2014

LiMn2O4and LiNi0.5-xCr2xMn1.5-xO4(x=0, 0.05) cathode materials of spinel structure were prepared via co-precipitation derived precursors and subsequent high-temperature sintering between the precursors and LiOH. XRD, SEM and electrochemical tests were performed for the characterization of the as-prepared samples. The results show that the substitutions of Ni and Cr for Mn can not prevent Mn2+from being oxidized into Mn3+in solution process, yet do not change their final crystal structures of spinel with or without substitution, and after substitution the first charge and discharge capacities decrease but its cyclic capability is improved significantly, especially for the Ni and Cr co-substitution
Mathematical Morphology Applied to the Cross Section of Microscopic Plant Fiber for Characterization of Geometric Parameters: A Case Study of “Rhektophyllum camerunense”
Authors: Kah P. , Njom A. , Mvola B. , Atangana J.A. , Martikainen J.
Published: April 2014

In this article, classification methods using mathematical morphology are used to generate the internal and external contours of an image of a natural fiber, "Rhektophyllum camerunense" taken by an epifluorescent electron microscope. The presence of impulse noise in the captured image and the presence of an almost identical texture characterized by the heterogeneity of the basic cells whose microstructure composes the fiber, make it difficult to use conventional methods of image analysis. As the fiber ofR. camerunenseconsists of basic cells interconnected by cellulosic hemicellulose, their delineation is possible by detecting the contour of the lumens. To distinguish the regions of basic cells, binarization is performed after application of a 3 × 3 median filter. The results obtained allow development of a method for calculating the geometrical parameters of the cross section of the fiberR. camerunenseand generation of the basic structure of the cross section by Voronoi diagram.
Microstructure of Recycled Gypsum Plaster by SEM
Authors: Camarini Gladis , Pinheiro Sayonara M.M.
Published: April 2014

Gypsum waste from building constructions is a material which can contaminate the soil and groundwater if is disposed directly in the soil or landfill without any control. In Brazil, these wastes are considered a recycle and/or recovery material, but the research of gypsum plaster recycling are very few at this moment. In this way, this work presents the microstructural characterization of two types of recycled plaster. The recycled plaster was produced by a grinding and calcination the building construction waste. Microstructural characteristics were evaluated by SEM observations. The results show similarities between crystals of recycled and commercial plasters.
PEG-PLGA Nanoparticles Entrapping Doxorubicin Reduced Doxorubicin-Induced Cardiotoxicity in Rats
Authors: Mao Jin Ning , Li Ai Jun , Zhao Liang Ping , Gao Lan , Xu Wei Ting , Hong Xiao Su , Jiang Wen Ping , Chen Jian Chang
Published: April 2014

Aim:Doxorubicin-induced cardiotoxicity limited its clinical utilization in oncology. In this study, Dox was entrapped into PEG-PLGA Nanoparticles, cardiotoxicity of Dox or PEG-PLGA-Dox was investigated in rats. Materials and methods :PEG-PLGA-Dox was prepared via modified single emulsion method. Its characterization including size, Drug loading capacity (DLC), entrapment efficiency (EE) were estimated. The cardiotoxicity of PEG-PLGA-Dox was assessed on SD rats via echocardiography and biochemical indicators compare to free Dox and physical sodium. Results:The average diameter of PEG-PLGA-Dox is around 200 nm, with DLC about 10%.After administered PEG-PLGA-Dox, the ratio of heart weight to body weight decreased not as significant as Dox group, level of serum parameters and echocardiography parameter also decreased little compared to the Dox group. Conclusions:After entrapped into PEG-PLGA nanoparticle, Dox-induced cardiotoxicity was reduced significantly.
Experimental Research and Simulation Analysis on Composite Structure Embedded Optical Fiber Sensor under Impact Load
Authors: Gao Fei , Song Hao , Wang Wen Juan
Published: April 2014

The low-energy impact experimental research and monitoring the response of composites structure at different impact positions was conducted by embedding fiber bragg grating strain sensor into composite laminates. Simulation work on the experimental models was conducted and compared to the results of the experiment. According to the Hashin failure criteria, a suitable calculation model was established to investigate the action of the laminates under high energy impact load. The spreading of the fiber damage areas could be observed in the structure until the macroscopic cracks appear. It was indicated that a proper model can be used to simulate the damage evolution and failure behavior of composites structure under the impact load.
Preparation of Hierarchical and Ordered Porous Nanostructured Carbons
Authors: Cai Jiang Tao , Zhou An Ning , Li Xiao Yan , Yan Ju Yan , Wang Li Juan , Jiang Jin Xia
Published: April 2014

The hierarchical and ordered porous nanostructured carbons (HOPNCs) have a very wide application in catalysis, adsorption separation, energy storage and other fields. In this paper, the HOPNCs was prepared through a dual-template method and the resole resin as the carbon precursor,followed by the ethanol solvent evaporation induced self-assembly process. The morphology and microstructure of the as-made products were characterized by SEM, XRD, TEM,and physical adsorption instrument. The results showed that the orderliness of mesoporous carbon materials are significantly enhanced while the ratio of P123/F127 was 1/3,a proper low concentration of template and alcohol solution was helpful to the solvent induced selfassembly formed ordered mesoporous structure of nanocarbons.The as-made HOPNCs have large pores of 200 nm or so, mesopores of 8 and 3 nm or so, the pore volume of 0.2527 cm3/g , the BET surface area of 510m2/g.
Preparation of Hollow/Porous Carbon Nanofibers from PAN with High Molecular Weight
Authors: Li Shu Feng , Chen Shao Ling , Deng Fei Yan , Cheng Bo Wen
Published: April 2014

In this paper, the hollow or porous carbon nanofibers based on the PAN with high molecular weight were manufactured through concentric electrospinning. The PAN terpolymers with the viscosity-average molecular weight of 30 kDa were synthesized via aqueous precipitation polymerization. Then the prepared PAN was dissolved in DMF to afford the shell. Two kinds of solutions, silicone oil and the 10% PVP DMF solution, were used as the core. After the concentric electrospinning, the obtained core-shell PAN nanofibers exhibit the different morphology. Compared with the 10% PVP DMF solution as the core, the silicone oil as the core led to the greater and more uneven in diameter. After the oxidative stabilization and carbonization, the PAN based carbon nanofibers (CNFs) showed the obvious hollow cores no matter the silicone oil or 10% PVP DMF solution is in core. When the silicone oil is in core, the profiles of the PAN based CNFs reveal the better fibrous shape and thinner diameter. Furthermore, a mixture of PAN and PMMA with the molecular ratio of 1:1 in shell and the 10% PVP DMF solution in core were also concentrically electrospun. FESEM reveals that the addition of PMMA made the nanofibers more even and thinner diameters. After carbonization, the resulted PAN based CNFs show the porous cross-section.
Preparation of Platinum Catalyst Supported on Porous Carbon Nanofibers
Authors: Li Shu Feng , Ding Xiao , Deng Fei Yan , Chen Shao Ling , Cheng Bo Wen
Published: April 2014

Low-temperature fuel cells have been attracting more and more attentions for the direct conversion of chemical energy into electricity. Efficiencies of fuel cells to a great extent depend on the activity of the catalytic platinum and its alloys. Increasing the reaction surface area and decreasing the diameter of platinum particles can enhance the activity of the platinum. In this paper, we report a platinum catalyst supported on porous carbon nanofibers. Two kinds of PAN terpolymers with various molecular weights of 15 kDa (PAN-1) and 30 kDa (PAN-2) were first prepared by aqueous precipitation polymerization. The mixtures of PAN with various molecular weights and PMMA were then electrospun, stabilized and carbonized to provide the porous carbon nanofibers. It was found that the PAN with lower molecular weight results in the even fibrous surface and thick diameter, indicating a stable spinning process. Moreover, the PAN-based carbon nanofibers were immersed into a platinum complex solution to support the platinum positive ions. After calcination, the platinum ions deposited on the carbon nanofibers were converted into nanoplatinum particles to provide the platinum catalyst supported on the porous carbon nanofibers.
Research on the Impacting Factors of Dimensional Accuracy with Silicone Mold Casting Products Based on FDM
Authors: Guo Hua , Zhou Ying Ting
Published: April 2014

Rapid prototyping and the silicone mold are more and more widely used in the process of new product development, it has become the hotshot in this field. With the method of single factor experiment and using rapid prototyping based on FDM technology as a master pattern,several main factors influence the dimensional precision molding products is analyzed and the redeem measures are put forward during silica gel mold casting process. The study has importance in guiding the practical application of the silicone mold casting products and provides the experimental basis on research and development to silicon mold technology.
Magnetic Properties of Nano Zerovalent Iron Particles Coated with Biopolymers
Authors: Xue Ding Qi
Published: April 2014

nanozerovalent iron particles coated with biopolymer nanoskin were prepared by liquid phase method. For a period of time, the remaining xanthan layer can prevent oxidation of nanoiron in air. The goal of this study is to demonstrate that magnetic properties of magnetic fluid which suspend nanoiron particles coated with xanthan in xanthan/guar fluid. Magnetic hysteresis loops were measured at room temperatures and field-cooled / zero-field-cooled magnetization curves were obtained at low temperature by a vibrating sample magnetometer. The results interpret that biopolymer nanoskin did not strongly weaken the magnetic interaction between nanoiron particles.
Structural and Optical Properties of VO2 Film Grown on Sapphire Substrate by Pulsed Laser Deposition
Authors: Bian Ji Ming , Miao Li Hua , Zhao Shu Kuo
Published: April 2014

VO2films were grown on sapphire substrates by pulsed laser deposition (PLD), and the structural and optical properties of as-grown films were investigated by X-ray diffraction (XRD), field effect scanning electron microscopy (FESEM), photoluminescence (PL), and optical-transmission measurements. The oxygen partial pressure in the growth chamber was found to be the key factor deciding the microstructure and properties of as-deposited VO2films, and its effects and corresponding mechanism were investigated systemically. Results indicated that dense and uniform VO2films with smooth surface were achieved by PLD under optimized oxygen partial pressure. Strong blue emission peaks were observed in room temperature photoluminescence (PL) spectra. Excellent selective optical-transmission of the VO2thin films from 200~3000 nm were also recorded at room temperature.
Study of the Mechanical Properties of the Composite Scene Rigid Pavement Structure
Authors: Lv Da Wei , Shi Shao Bo , Sun Xiao Li
Published: April 2014

s: Rigid Pavement composite performance is more complex, there is no analytical formulas can better predict its mechanical properties. This article by buried sensors in ShanMei Expressway Cement Asphalt Paving Project, on-site monitoring of the actual variation of the mechanical properties of the composite pavement structure, this study provides a theory basis for the optimization design of highway asphalt overlay structure of Cement Concrete Pavement.
Study on Corrosion Behaviors of Epoxy Aluminum Coating Immersed in 3.5%NaCl Solution
Authors: Yan Rui , Liang Ting , Ren Hong Chun , Gu Jin , Ji Zhuang Zhou
Published: April 2014

Electrochemical corrosion behavior of epoxy aluminum coating immersed in 3.5%NaCl solution was investigated using electrochemical impedance spectroscopy (EIS). SEM was also used to analyze the surface images of coating, and the failure mechanism was discussed as well. The experimental results showed that corrosive species can penetrate into coatings and reach the coating/substrate interface promptly, causing the decrease of electro-resistance and the beginning of electrochemical corrosion at the coatings/metal interface. The coating was compact and continuous at beginning, while the blisters and cavities appeared after corrosion, which were formed osmotic pressure created by corrosion species penetration.
The Calculation Methods of Markstein Numbers and Laminar Burning Velocities for Hydrogen-Air Premixed Mixtures in Constant Volume Combustion Bomb
Authors: Hu Heng Jie , Wang Guo Qing , Zhu Yin
Published: April 2014

Energy and emissions are the two major problems the automotive industry facing currently. Hydrogen has been of great concern worldwide as a renewable clean fuel.It has burn fast, wide flammable range, less pollution, and many other advantages. Premixed laminar burning is an important part of researching combustion mechanism,and Is an important means of developing and verifying fuel combustion chemical reaction kinetics mechanism.
The Damping Properties of the Natural Rubber Filled with ZnO
Authors: Zhao Yan Fang , Liu Dan , Liao Shuang Quan , Liao Xiao Xue , Lin Sheng Bo
Published: April 2014

The research on the mechanical properties and thermal stability of the natural rubber filled with different dosage of Zinc oxide (ZnO). The results showed that with the increase of the content of the ZnO, the tensile strength first increased, then decreased the, but the tear strength showed a trend of increase,the thermal stability had improved; When the amount of ZnO added was 9, damping performance was better.
The Effect of Directionally Chilled Microstructure on Hypereutectic High-Chromium White Cast Iron
Authors: Yang Dong Shyen , Lin Ji Syuan , Pen Dar Jen , Hsu Fang Ming
Published: April 2014

This study examined the effect of fluid convection on microstructures of directionally solidified high-chromium white cast iron (ASTM A532-87 Class III) with carbon equivalents of 4.5. The iron was first melted in a high-frequency induction furnace, and then poured into a sandwiched cylindrical Furan resin sand mold. The middle part is a chilled copper mold kept cold by circulating water, enabling simultaneous directional solidification in the upper and lower zones. The microstructure thus solidified is affected by directionally chilled between these parts. Distribution of temperature in the mold during cast solidification was measured by K-type thermocouples. The measured results show that the lower zone has stronger thermal convection and faster cooling rate than the upper zone. The lower zone has smaller liquidus and solidus gradients than the upper zone.
The Effect of Weld Geometry on the Stiffness of I-Core Steel Sandwich Plate
Authors: Sun Yu Ping , Ren Yu Ying , Qiao Ji Sen , Jiang Xiao Xia
Published: April 2014

This paper presents the influence of the weld widthroot gapand weld offset of the T-joint to the overall stiffness of sandwich plate with finite element simulations. From the results of finite element calculation and some of experimental verification we can see:(1) For this structure, welding joint damage occurs before the face plate buckling.(2) Among the factors weld widthgap and weld offset of the T-joint, the weld width affect the overall stiffness the most. (3) When root gap and weld offset lower 0.1mm and 0.12 mm, respectively, they have a little influence on the resistance of deformation ability for the sandwich plate, they can be ignore.
Thermal Design and Dynamic Analysis of Metallic Thermal Protection System
Authors: Chen Hong Yong , Chen Hai Bo
Published: April 2014

Metallic thermal protection system (MTPS) is a key component in space vehicle design. By introducing thermal contact resistance (TCR) on the interface between different layers of MTPS, an one dimensional (1D) thermal conduction model for MTPS with multiple functions is established for thermal design. An optimization method is proposed to determine the thermal parameter by comparing the results of 1D finite differential simulation with the test ones. The thermal mode is analyzed by three dimensional FEM analysis and the results show that the mechanical characteristics of MTPS appear to be asymmetric which provides a new consideration to insulate the fluctuating load.
Analysis on the Bonding Property of the Propellant and Liner
Authors: Chen Guo Hui , Tian Jun , Liu Chen , Li Dong , Lu Xiang Hui
Published: April 2014

The properties of interface and bonding between the liner and propellant were systematically studied with regard to MAPO content, filler and plasticizer types, and vulcanized agent. It was indicated that the bonding strength of liner and propellant arrive the highest value 0.32MPa when MAPO contents was 3% and there is a little effect on bonding strength for vulcanized parameter. Moreover, the bonding strength gets weaker when the content of plasticizer decreases. Significantly, the molecular sieve can improve bonding strength greatly. Compared with other cure agent, TDI was the best vulcanized agent, and when it was used in the vulcanized system, the highest value of bonding strength between liner and propellant could be obtained.
Study on Methanol/Biodiesel for Agricultural Diesel Engines Applications
Authors: Li Rui Na , Wang Zhong , Hou Ling Chuan , Li Ming Di
Published: April 2014

According to the physical and chemical properties of methanol, fuel was prepared using the methanol and biodiesel. The physical and chemical properties of the blends were investigated, and the combustion process calculation model of 186FA diesel engine was established. The spray characteristics and in-cylinder pressure were calculated of diesel engine fueled with the blend of biodiesel added with 15% methanol at 3000r/min, 5.7kW. The results show that, the spray penetration shortens and the sauter mean diameter reduces when diesel engine fueled with methanol/biodiesel, besides, the maximum cylinder pressure reduces. However, the maximum pressure rise rate increases.
Quality of CFRP Cross-Sections by Cutting at the Situation of Resin Infiltration and their Defects Suppressing
Authors: Guo Yu Qin , Meng Zhao , Sun Min Hang , Chen Wei , Chen Long
Published: April 2014

As a kind of promising lightweight material, CFRP (Carbon Fiber Reinforcement Polymers) have been widely concerned in automobile industry in last decades. In the present work, series of experiments are conducted to investigate the impact of key process conditions, including the cutting edge geometry, curing process and cutting manner, on the CFRP cross-sections quality by cutting at resin infiltration during implementing the CFRP parts integrated manufacturing processes based on RFI process. For the typical cross-section defect such as the debunching of carbon fiber, chippings of carbon fiber and resin salivation, authors explain why that happens and propose the corresponding suppressing measures. Research results show that, under the existing experimental conditions, the optimal process scheme is to combine the large arc edge with curing before punch returns back and press cutting to obtain the desired CFRP cross-sections.
The Experiment Study on How Medium Gas Affects Seawater Desalination Facility's Performance
Authors: Yao Yang , Chen Zhi Li , Yu Tao , Zheng Hong Fei , Yang Yi
Published: April 2014

A self-designed small size three-effect tubular still is used to conduct a study on the stills performance in the condition of different medium gases (air, oxygen, carbon dioxide and helium, namely a research about the steady state water-yielding capacity and heat preservation performance. The research concludes that when using carbon dioxide as the medium gas, the steady state water-yielding capacity of desalination facility is better at temperature of 80°and below, water-yielding rate can be as much as 0.6kg/h, which is increased by 18% compared of using air as medium gas; when using carbon dioxide as the medium gas, the heat preservation performance of desalination facility is better ,of which the average temperature is 2°higher than any other medium gas. Thus the system can perform better under the condition of medium gas of carbon dioxide without illumination.
Controlled Release of Hydrophilic Guest Molecules from Photoresponsive Nucleolipid Vesicles
Authors: Sun Ya Wei
Published: April 2014

We here report a novel design and synthesis of a light-responsive nucleolipid by introducing an o-nitrobenzyl group that acts as a linker between a nucleotide and a lipid. The nucleolipid was applied readily to preparing smart vesicles and encapsulating hydrophilic guest molecules 5(6)-carboxyfluorescein (CF) in their inner aqueous phase. Upon light irradiation, their vesicular structure was disrupted as a result of the photolytic degradation of the nucleotide, resulting in CF release. Furthermore, temporally controlled CF release from these vesicles could be readily realized by turning on and off light. By demonstrating the molecular assembly and photo-disassembly cycle, this report aims to stimulate further research exploring practical applications of nucleolipids.
A Deformation Analysis and Compensation Algorithm for Bracket Structure of Automatic Drill-Riveting System
Authors: Yang Yuan , Wang Zhong Qi , Kang Yong Gang , Chang Zheng Ping
Published: April 2014

Since the bracket deformation caused by its deadweight is too large, and the riveting of aircraft panel is always over-tolerance, a new algorithm for analysis and compensation of bracket deformation is presented in this paper. The algorithm is formed by combining finite element (FE) simulation with analytic method, which is fit for different combinations of supporting plates of bracket system. The formula is constructed through cubic spline interpolation and envelope surface fitting according to the FE simulation data. Meanwhile, a corresponding compensation method is proposed. Finally, a numerical simulation example with the software of ABAQUS shows that the algorithm and its results are valid and feasible.
A Key Processing Technology of Welded Steel Tube for High-Strength Automotive Drive Shaft
Authors: Liu Xiao Jun , Wu Yuan Feng , Chu Xing Rong , Wei Qiang , Fu Qian Jin , Ji Qing Gao , Zhao Chun Feng
Published: April 2014

High-strength steel has a promising application due to vehicle mass reduction requirement while the high springback of forming and welding processes limits its application. Bending control and welding processes of ZQS700Z welded tube for automotive drive shaft are studied and the key processing technology is obtained. Weld microstructure analysis and flattening/flaring tests are performed and good performances are obtained.
A Design Scheme of Device for Producing Fresh Water
Authors: Zhang Yong Yong
Published: April 2014

This paper designed a new device for producing fresh water. In order to solve the problem of freshwater shortage in the offshore drilling platform or barren island, Firstly the device will change wave energy into gravitational potential energy of the floater. Then the gravitational potential energy of the floater is converted into mechanical energy by the intermediate transmission device. and mechanical energy is converted into pressure energy by the vacuum pump. The pressure of the system is reduced. The saturation temperature of water is further fall. Then the evaporation of seawater required heat is reduced. so the device has the effect of saving energy. Firstly, this paper established the mathematical model in the steady state. Through the analysis of the mathematical model, water production can meet the fresh water requirements of offshore drilling platforms, the device has the economic efficiency and good energy saving effect.. Research contents Firstly, through consulting data and sampling methods, we determine the amount of fresh water of offshore drilling platform on one day, and the minimum water production capacity should be determined; and determine the structural frame work platform sea area near the stable system and weather related natural factors (example: wind speed, wave height, wave cycle).The related natural factors in each season the working platform nearby the offshore drilling platform should be determined.(example: wind speed, wave height, wave cycle). Secondly, according to the analysis of survey results and data, we calculate the dilution tank capacity and the minimum pressure to bear; designing shape of floater , the determination of its size, the reasonable selection of materials, rational design of the wave shape, determine the size, screening materials; reasonable arrangements for the design of negative pressure fresh water conversion device installation. The reasonable installation of the device on the drilling platform Thirdly, we consider the low limit, tank capacity and the size of floater, and errors should be taken into account, then we can determine the working volume of vacuum pump, selecting materials, reasonable pipeline design; determining the size of solar panels and the calculation of the generation. Fourthly, we calculate the minimum driving force, the average working distance of float and power of the pump by the data Fifthly, we considering the various data, then testing weather design of the device is very reasonable through the reasonable calculation; And according to the minimum driving force and float force, we calculate parameters of intermediate transmission mechanism, the design efficient transmission device; by considering the proper placement of solar energy device. Fig. 1 is the research process. Fig. 1 the research process
A PLC-Based Tension Training System Design
Authors: Han Jian Bing , Liu Shi Zhe , Li Ping , Yao Zong Yao , Mi Jin Cang
Published: April 2014

The PLC-based tension training system consists of three-phase asynchronous motors, programmable logic controllers (PLC), inverters, touch screen and sensor. Taking PLC as the controller, the system uses two sets of three-phase asynchronous motors to complete the delivery and winding of fibers, uses two inverters respectively to control the operation of the motors, and measures the fiber tension through tension sensor, and then feeds back the result to the PLC. Besides, by the touch screen control interface design, the system can achieve single motors inching, winding, and unwinding, two motors simultaneous operation and other operation modes. PID, fuzzy PID, genetic algorithm based PID and other algorithms can be used in the tests of the system. The PLC-based tension training system is of great help for enhancing the hands-on ability of college students or junior technical staff.
A Truck Frame Fatigue Life Forecast Based on Virtual Prototype Technology
Authors: Li Qiang
Published: April 2014

Frame is the stress of the main components of automobile chassis, under various direction and the form of load, the main damage form is fatigue failure under cyclic loading. In order to predict the fatigue life of the frame structure, combines the finite element analysis and multibody dynamics simulation, the vehicle multi-body dynamics model was established, and according to the China traffic simulation, the corresponding load spectrum was got. Frame finite element model was established and a strength analysis was carried out for the model, on this basis, according to the frame material fatigue performance data and load process, the fatigue life of the frame was studied by using finite element analysis software analysis, the fatigue life distribution and the position of the prone to fatigue failure of the frame were found, the results show that the strength and fatigue life of the frame were comply with the design requirements.
Assembly Key of Precise Blanking Punching Compound Die
Authors: Bai Xi Ping
Published: April 2014

Taking the example of precise gasket blanking die, the author introduces that the key of compound die assembly is adjusting the gap between moulds which directly influences the quality of products and the dies lifetime. When assembling, one must assure the uniformity of the gap between the terrace and sunken die.
Common Mechanical Problems Diagnosis and Elimination of the Rapier Loom
Authors: Lian Zhao Min
Published: April 2014

For rapier loom,in five big institutions and main auxiliary institutions,weft insertion mechanism and let-off mechanism in all kinds of mechanical problems frequency are higher,this paper focuses on GTM-AS type rapier loom as an example to introduce the mechanical problems diagnosis and elimination methods.
Correlation of Non-Destructive Pavement Test Devices
Authors: Li Sheng Chun
Published: April 2014

This paper studies the correlation of non-destructive pavement test devices, the falling weight deflectometer (FWD) and Benkelman Beam (BB), in evaluation of pavement structure capacity. Field measurements were made at an expansion highwayG6 in Ningxia Hui Autonomous Region, China. Based on the deflection results measured with FWD and BB, the relationship between FWD and BB was established. The subgrade moduli of the test section were back-calculated. The results show that the ratio of E(sta) and MR(dyn) is consistent with the suggestion of AASHTO 1993. Due to the fact that the use of FWD test is convenient and the results are stable, it demonstrates that the falling weight deflectometer (FWD) is an appropriate device to evaluate the pavement structural and to select the optimal pavement rehabilitation strategy in the near future.
Design of the Plate Heat Exchanger
Authors: Chen Kai Jun
Published: April 2014

The plate heat exchanger is an ideal heat exchange equipment for liquid - liquid, liquid--gas, it has the characteristics of high heat exchange efficiency, low heat loss, compact structure, small occupation area, convenient installation and cleaning, wide application, long service life etc.. So the design of plate heat exchanger in the relevant state industrial construction is a very important link,
Electromechanical Coupling Vibration of Rolling Mill Excited by Variable Frequency Harmonic
Authors: Zhang Yi Fang , Yan Xiao Qiang , Ling Qi Hui
Published: April 2014

Using torque telemetry system to test the mechanical drive system of rolling mill,it is found that the torsional vibration and current signal in the electric drive system have the same obviously vibration frequency. The model of cycloconverter, synchronous motor and mechanical drive system of rolling mill are built and analysed by Matlab/Simulink and ANSYS.The simulation results show when the harmonic torque frequency and the torsional vibration natural frequency of for mechanical drive system are equal or close, the strong torsional vibration arouse It is proved that the convertor output current harmonics can induce the electromechanical coupling vibration of main mechanical drive system under the certain conditions.
Harmonic Response Analysis on Motorcycle Frame
Authors: Zhang Yan Fang , Zhou Min
Published: April 2014

Harmonic response analysis is used in this paper, and the purpose is to analyze the vibration response of a motorcycle frame at the frequency of the load changes continuously. Then comparison about vibration characteristics of the frame structure before and after improvement is to verify the validity of the frame structure improvement.
Pneumatic Manipulator Wrist Structure and PLC Control Design
Authors: Zhang Xiu Mei
Published: April 2014

The robot wrist is used to adjust the orientation of the grasped object (ie posture), a rotary motion of the wrist must be met job requirements. Analysis of the degree of freedom of the wrist, the wrist were driving torque calculation, analysis programmable controller selection methods and working process.
Decontamination of HD on the Surface of Military Uniform by Vaporous Hydrogen Peroxide
Authors: Gu Jin , Zhu Xue Zheng , Liang Ting , Yan Rui , Kuang Dong
Published: April 2014

Vaporous Hydrogen Peroxide is a kind of decontaminants with the feature of Low-temperature, Non-water, Low-corrode, has great potential in decontaminating sensitive equipments and the inner space of large equipments overseas. The main objective of this study was to study whether Vaporous Hydrogen Peroxide can be used to decontaminate the Military Uniform. For this purpose, a series experiments were carried out. The results show that Vaporous Hydrogen Peroxide can degradation HD,but the efficacy depends on the drop size and density of HD. And Vaporous Hydrogen Peroxide can compatible with Military Uniform, and no corrosive happen. So we have a conclusion that the VHP can be used for the decontamination of HD.
Study of Non-Equilibrium Arms Bridge Circuit for Water Plugging of Horizontal Wells in Sandstone Reservoir
Authors: Xie Gang , Yan Hai Jun , Ju Deng Feng , Ma Zhi , Wei Ai Jun , Jiang Wei Qi , Zhang Li Li , Gao Meng Xiang
Published: April 2014

In view of rapid water cut increasing and poor oil recovery with banded distribution with high permeability belt in sandstone reservoir of Huabei Oilfield,the electrical bridge technique for water shut-off is proposed. Based on years practice of vertical wells and similarity in Ohms and Darcys laws,the electrical model involved variable resistors series/parallel instead of reservoir distribution,the arm-bridge circuit combined with signal detection. Then response of the circuit by variable water shut-off could be simulated. The results indicated that,the driving pressure and seepage quantity at mid-low permeability channel could be greatly improved by the strong in-depth water-plugging at high permeability channel (L=20~40m),and the low permeability flowrate increased to a maximum of 55.3%. Then the gel dam in-depth fluid diversion technique was verified by water plugging and circuit simulation. The conclusions provided a valuable guidance for horizontal wells development enhanced.
The Analysis of the Stiffness about the School Bus Based on Hyper Mesh
Authors: Zheng Ming Feng , Chen Yue , Yan Ya Lin
Published: April 2014

Established a finite element model of the school bus based on the Hyper Mesh, take a finite element simulation about the various parts of the school bus parameters such as stress, displacement and deformation under 5 conditions. Through the analysis of the school bus to identify conditions displacement of stress more concentrated area as well as in operation, by optimizing improve the local structure of these regions,improve the stress concentration and safety.
The Creation of the Mathematical Model of Involute Gear Modeling
Authors: Shi Yan Hong , Yao Shuang , Yao Xin
Published: April 2014

The paper puts forward a way to establish the mathematical model of involute gear according to the basic knowledge of mechanical design and method of mathematical analysis. A data file of coordinates of a series of points is generated by the use of powerful data analysis and mathematical calculation function of Excel. Based on this, involute and helix of high precision are designed through the seamless joint of Solid Edge and Excel. Then accurately modeling of involute gear can be realized. After modeling, high-precision gear can be manufactured through CNC machining to meet the equipment requirements for gear accuracy.