Time filter

Source Type

Xie B.,Anhui Vocational and Technical College | Xu S.C.,Tsinghua University | Li P.Y.,University of Michigan
INMATEH - Agricultural Engineering | Year: 2016

Farming truck engine operating conditions are typically far from the optimal economic region. In this study, we selected a 5-ton farming truck as the research subject and built a digital vehicle model by using Advanced Vehicle Simulator (ADVISOR) software. We set the operating condition as CYC-NYTRUCK and used transmission ratio as a variable. The objective function was set up based on the fuel consumption, which corresponded to the transmission ratio. By adopting the optimum method of hope interval, all levels of farming truck transmission ratios can be optimized. Then, we used a different gearbox ratio with a design based on different variables, and calculated fuel consumption. Results showed that the hope interval for the optimum transmission ratio fell within the range of 30% to 40%. Within the hope interval, we reduced the variable and resigned the transmission ratio. After calculation, the corresponding transmission ratio for the least fuel consumption was obtained. Keeping the transmission ratios for the 1st and 5th gears constant, the transmission ratios for the 2nd, 3rd, and 4th gears were adjusted to 4.97, 3.11, and 1.95 respectively. The fuel consumption of the transmission ratio after optimization was reduced by 1.2 L/100 km. Furthermore, the acceleration time within 0 km/h to 80 km/h was less than 0.1 s. Overall, the optimized transmission ratios greatly improved the fuel economy and power performance of the farming truck. The research results could provide reference to parameter optimization and application of the transmission system of the farming truck.


Xuan F.,Anhui University of Science and Technology | Xuan F.,Anhui Vocational and Technical College | Liu J.,Hefei University | Xu T.,Anhui University of Science and Technology
Polymers for Advanced Technologies | Year: 2011

Charged hybrid membranes with anionic- or cationic-exchange groups have attracted increasing interest due to their higher thermal stabilities and structural flexibilities which are considered suitable for use in some harsh conditions, such as higher temperature and strongly oxidizing circumstances, for industrial applications. To develop new routes to synthesize the negatively charged hybrid membranes, a series of hybrid membranes were prepared via free radical polymerization of glycidylmethacrylate (GMA) and γ-methacryloxypropyl trimethoxy silane (MPTMS) monomers, and ring-opening of epoxide to create negatively charged -SO3H groups in the polymer chains. The fundamental properties of these prepared membranes were characterized through TGA, ion-change capacity (IEC), and MALDI-TOF mass spectra. TGA showed that the thermal degradation temperature of these membranes could reach up to 300°C and the temperature of the first endothermic peak decreased with an increase in the content of -SO3H groups. IEC measurements showed that their IECs were within the range of 0.22-0.35mmolg-1. MALDI-TOF spectrometry indicated that the incorporation of GMA into the hybrid matrix could improve the structural stability of the membranes. These findings demonstrated that the ion-exchange properties and structural stability of negatively charged hybrid membranes can be conveniently controlled by adjusting the GMA moiety in the hybrid matrix. © 2009 John Wiley & Sons, Ltd.


Hao J.,Hefei University of Technology | Hao J.,Anhui Vocational and Technical College | Gong M.,University of Chinese Academy of Sciences | Wu Y.,Yancheng Teachers University | And 3 more authors.
Journal of Hazardous Materials | Year: 2013

By changing -COOH content in poly(acrylic acid-co-methacryloxypropyl trimethoxy silane (poly(AA-co-γ-MPS)), a series of PVA/SiO2 cation exchange membranes are prepared from sol-gel process of poly(AA-co-γ-MPS) in presence of poly(vinyl alcohol) (PVA). The membranes have the initial decomposition temperature (IDT) values of 236-274°C. The tensile strength (TS) ranges from 17.4MPa to 44.4MPa. The dimensional stability in length (DS-length) is in the range of 10%-25%, and the DS-area is in the range of 21%-56% in 65°C water. The water content (WR) ranges from 61.2% to 81.7%, the ion exchange capacity (IEC) ranges from 1.69mmol/g to 1.90mmol/g. Effects of -COOH content on diffusion dialysis (DD) performance also are investigated for their potential applications. The membranes are tested for recovering NaOH from the mixture of NaOH/Na2WO4 at 25 - 45°C. The dialysis coefficients of NaOH (UOH) are in the range of 0.006-0.032m/h, which are higher than those of the previous membranes (UOH: 0.0015m/h, at 25°C). The selectivity (S) can reach up to 36.2. The DD performances have been correlated with the membrane structure, especially the continuous arrangement of -COOH in poly(AA-co-γ-MPS) chain. © 2012 Elsevier B.V.


Zhang X.-M.,Anhui Vocational and Technical College | Ye G.,Anhui Vocational and Technical College
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2011

Cd1-xZnxS single crystalline with comb-like nanostructures were successfully synthesized by a simple chemical vapor deposition technology. As-synthesized Cd1-xZnxS nanostructures were characterized using X-ray diffraction (XRD), scanning electronic microscopy (SEM), transmission electronic microscopy (TEM), and selected area electronic diffraction (SAED). A series of electron microscopy characterization results suggest that the growth of Cd1-xZnxS comb-like nanostructure was controlled by the vapor-solid growth mechanism and the self-catalyzed process of the polar surface. The morphologies could be controlled by adjusting the deposition position and gas rate. Fluorescence spectrum reveals that the Cd1-xZnxS comb-like nanostructures have a strong luminescence centered at 480 nm and one weak luminescence center at 515 nm, respectively.


Tang X.,Anhui Vocational and Technical College
Procedia Engineering | Year: 2011

Next generation networks supporting multimedia applications include hybrid/integrated satellite-terrestrial network architectures require stringent QOS provisioning for fixed and/or mobile services. In this paper, we have described Integrated Network architecture and technical challenges for the system realization based on the ITU-R current work plan. We developed a cross-layer design based simulation framework in order to understand the impact of rain fade and mitigation due to DVB-S2 on the multimedia applications. our simulation network models include DVB-S2/RCS for the satellite segment and two scenarios for terrestrial segments namely WiMAX and WiFi. In particular, our simulations demonstrated the advantage of cross layer design in system capacity gains for VoIP users in hybrid network with WiMAX as terrestrial segment. Also our results show the impact of fading on applications such as video conferencing VoIP, HTTP, Data Base Query and FTP in terms of QOS parameters e.g. bandwidth allocation, end-to-end delay, delay variation. © 2011 Published by Elsevier Ltd.


Jin J.,Anhui Vocational and Technical College
Wool Textile Journal | Year: 2015

Based on nylon-6, this article studies the effect of physical property on filament number of nylon yarn, ratios of warp and weft densities, dyeing process and finishing technology used on different type superfine nylon down fabrics which are produced by different weave designing, processing methods and technology. The optimized process methods and satiation concluded by experiment data can be for the practical producing reference. Tests show that as the increases of filament number, the tearing strength and downproofness ability will be promoted accordingly with the superfine nylon down fabrics. If the ratio of warp and weft densities approaches one under the fabrics of the same specification, the more tearing strength with the less slippage, the better downproofness ability. When the specification of yarn is the same under the same other conditions, the tearing strength and downproofness ability with finish treatment have advantages over. Compared with open dyeing using beam dyeing machine, the rope dyeing using flow dyeing machines has advantages on good effects of downproofness ability, slippage and the tearing strength. If the specification of yarn and other conditions keep the same, the tearing strength and downproofness ability done with aqueous polyurethane adhesive have advantages over that of other finish treatment while there is no difference on slippage.


Xie B.,Anhui Vocational and Technical College | Lv D.-M.,Hefei University of Technology
Journal of Computational Methods in Sciences and Engineering | Year: 2015

Beam is an important component of CNC double column vertical lathe, its structural design and static and dynamic characteristics have direct influence on the machining accuracy and service life of the machine tool. The test object is a machine tool beam provided by the Heng-sheng machine tool plant, using test method of single-point excitation provided by hammer force and mobile acceleration sensor. The paper employs Poly-Max, the most widely used modal parameter identification method, to analyze the measured frequency response function data so as to derive the modal parameters, including intrinsic frequency, damping ratio and mode of vibration. Beams of the modal test of beam model is set up, collecting data and setting parameters. By analyzing the intrinsic characteristics of structure, beam structure optimization strategy can be developed. The paper provides a theoretical basis for the structural optimization design and manufacturing of similar components and parts. © 2015 - IOS Press and the authors.


Chen G.,Anhui Vocational and Technical College | Du Z.F.,Anhui Agricultural University | Li Z.,Anhui Vocational and Technical College | Song W.M.,Langfang Chinatex Xinyuan Nonwovens Co.
Advanced Materials Research | Year: 2013

This experiment made use of hand lay-up to generate nonwoven reinforced composites which used glass fiber nonwovens, glass fiber felt and PE hot rolling nonwovens as the reinforcement, thermosetting unsaturated resin as the matrix, and tested their tensile and bending mechanical properties, then analyzed mechanical properties by gray relative analysis. The results show that when glass fiber felt is used as reinforcement and its content greater than 60%, the comprehensive mechanical properties of the composite are the best. At the same time, we observed the tensile fractures to analyze the failure mechanism of the composites. © (2013) Trans Tech Publications, Switzerland.


Hao J.,Hefei University of Technology | Hao J.,Anhui Vocational and Technical College | Wu Y.,Yancheng Teachers University | Ran J.,Hefei University of Technology | And 2 more authors.
Journal of Membrane Science | Year: 2013

Here, a novel and green route for preparing cation exchange hybrid membranes is presented via polyvinyl alcohol (PVA) and 3-trihydroxysilyl-1-propanesulfonic acid (THOPS), during which aqueous media instead of organic solvents is used and sulfonation process is avoided. The resulting hybrid membranes have the water uptake (WR) of 38-86%, ion exchange capacities (IECs) of 0.70-1.56mmol/g, initial decomposition temperature (IDT) of 224-231°C, tensile strength (TS) of 13.3-40.7MPa, and favorable elongation at break (Eb) of 177-571%. The linear expansion ratio (LER) is in the range of 15-25% in water, while in the range of 18-27% in 1.0M alkali solution. Diffusion dialysis (DD) of NaOH/Na2WO4 system shows that the dialysis coefficients of NaOH (UOH) are in the range of 0.011-0.022m/h, with the separation factors (S) of 11.6-20.6. Consequently, apart from endowing the resulting hybrid membranes with desirable DD performances, the method employed herein is simple and environment-friendly particularly due to the avoidance of organic solvents and hazardous sulfonation agents. © 2013 Elsevier B.V.


Hao J.,Hefei University of Technology | Hao J.,Anhui Vocational and Technical College | Wu Y.,Yancheng Teachers University | Xu T.,Hefei University of Technology
Journal of Membrane Science | Year: 2013

Cation exchange multisilicon copolymer with a long main chain and many branched chains as well as high content of cation exchange and -Si(OR)3 groups has been developed from sodium allylsulfonate (SAS) and vinyltrimethoxysilane (VTMS). The corresponding PVA/SiO2 cation exchange hybrid membranes have been prepared via the sol-gel process of the copolymer with poly(vinyl alcohol) (PVA).The hybrid membranes have the water uptake (WR) 84-106%, ion exchange capacity (IEC) 0.14-0.45mmol/g, initial decomposition temperature (IDT) 225-233°C and tensile strength (TS) 23.9-44.0MPa. They are stable in 1M NaOH solution with a linear expansion ratio (LER) of 17.7-18.3% and a weight loss percent of 4.3-5.5% for 30 days. The diffusion dialysis (DD) process for the alkali mixture indicates that the dialysis coefficients of NaOH (UOH) are around 0.0065-0.0086m/h and the separation factors (S) are in the range of 24.4-51.6 for the NaOH/Na2WO4 system and 13.9-9.6 for the NaOH/NaAlO2 system. Hence, the hybrid membranes can be potentially applied in the DD process for the alkali recovery. © 2012 Elsevier B.V.

Loading Anhui Vocational and Technical College collaborators
Loading Anhui Vocational and Technical College collaborators