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Guangdong Industry Technical College | Date: 2017-02-01

A self-cleaning extruding apparatus with two co-rotating screws and the method thereof are provided here. Said apparatus is comprised of a screw mechanism, a barrel (1), a feeding port (10), a venting port (11), and a discharge port (12). Said screw mechanism is comprised of the first screw with one tip (3) and the second screw with two tips (4). There is a baffle in the channel of the first screw and the baffles height is lower than that of the screw flight. The baffle will cause hyperbolic perturbation in the shape of a figure 8 flow pattern above the top of the baffle. The first and second screws rotate at the same speed and touch each other at all times, thereby achieving a self-cleaning function. The baffle will generate chaotic mixing in the screw channel caused by the hyperbolic perturbation. Topological chaos is also introduced into the screw channel by the mechanism one part divided into two parts, then two parts converging into one part, and then one part divided into two parts once more. Each of the screws in the present invention uses an asymmetrical flow channel geometrical shape, such that a periodic action like compression-expansion-further compression-expansion further works. The above three enhancement mechanisms work together to efficiently accelerate melting and mixing.

Bai P.,Guangdong Industry Technical College
Advanced Materials Research | Year: 2012

Due to great pressure difference between inlet and outlet, high-pressure gear pump can cause unbalanced radial force, which results in serious wearing between axle journal of drive shaft and bearing-hole, non-ideal dynamic characteristics, and drop of volumetric efficiency after long run. This paper introduces a new sealing structure. Based on this structure, a high-pressure oil reservoir is installed on the wall of the inner-hole of floating plate for radial support and lubricating, which can effectively reduce shaft wearing and noise, and improve working dynamic characteristics of high-pressure gear pump. © (2012) Trans Tech Publications.

Xiang H.,Guangdong Industry Technical College | Lu W.-G.,Shaoguan University | Zhang W.-X.,Sun Yat Sen University | Jiang L.,Sun Yat Sen University
Dalton Transactions | Year: 2013

A unique compressed octahedral {CrIII 2Dy III 4} aggregate is the first sulfate-based single-molecule magnet (SMM) with Ueff/kB = 39.7 K and τ0 = 2.9 × 10-9 s. Its synthesis opens a new avenue to prepare 3d-4f coordination clusters. © The Royal Society of Chemistry 2013.

Gong S.,Guangdong Industry Technical College
Journal of cosmetic science | Year: 2013

A study on the kinetics of inhibitory effect of isoferulic acid on the monophenolase and diphenolase activity of mushroom tyrosinase was carried out using enzymological kinetic analysis method in a Na2HPO4-NaH2PO4 buffer solution (pH = 6.8) at 30°C. It was found that isoferulic acid efficiently inhibits both monophenolase and diphenolase activities of mushroom tyrosinase under experimental conditions. Concentrations of isoferulic acid leading to 50% rate inhibition (IC50) on monophenolase and diphenolase activity were calculated to be 0.13 mmol/L and 0.39 mmol/L, respectively, which are much lower than that of arbutin (IC50 = 5.3 mmol/L for diphenolase activity). The presence of isoferulic acid also prolongs the lag period in the oxidation process of l-tyrosine via tyrosinase-a 4.3-min lagging was observed with the presence of 0.20 mmol/L isoferulic acid-compared to a 1.1-min lagging in the absence of isoferulic acid. The Lineweaver-Burk plot demonstrates a competitive behavior of isoferulic acid in the tyrosinase oxidation of l-3,4-dihydroxyphenylalanine, with maximum reaction rate (vm) and inhibition constant (KI) at 64.5 μM/min and 0.11 mmol/L, respectively.

Lin S.-L.,South China University of Technology | Xu M.-Y.,Guangdong Industry Technical College | Yang Z.-R.,South China University of Technology
Soft Matter | Year: 2012

For the first time dissipative particle dynamics (DPD) simulations were employed to study the microstructures of an emulsion with alternating copolymers as the emulsifier. To model the alternating copolymers, an angular force was introduced by determining the stiffness parameters based on a linear quantitative structure-property relationship model. We studied the kinetics of emulsion formation by analyzing the time evolution of pressure, temperature, droplet number, the mean end-to-end distance and the morphologies of the emulsified oil droplets. The effect of emulsifier concentration on the mesostructures of the emulsified oil droplets was also discussed and the simulation results can interpret the experimental results on the microscopic level. Accordingly, the DPD method is a powerful tool for investigating emulsions with alternating copolymers and may be extended to drug delivery systems containing these copolymers.

Wang S.,South China University of Technology | Qin P.,South China University of Technology | Fang X.,South China University of Technology | Zhang Z.,South China University of Technology | Liu X.,Guangdong Industry Technical College
Solar Energy | Year: 2014

This paper demonstrates a novel sebacic acid/expanded graphite (SA/EG) composite phase change material for medium-temperature solar heat storage. The optimal mass percentage of SA in the SA/EG composite PCM is determined to be around 85%, at which not only SA exhibits a uniform distribution into the pores of EG but also the liquid leakage can be effectively prevented. The composite PCM with the SA mass percentage of 85% has a phase change temperature of 128. °C with the latent heat as high as ca. 187. J/g. The combination of SA and EG effectively prevents the low extent of subcooling inherent in SA. Compared to SA, the SA/EG composite PCM has the advantages of negligible subcooling as well as better thermal reliability and stability. The SA/EG composite PCM can easily be formed into various shapes by dry pressing, with little loss in thermal properties but a remarkable increase in thermal conductivity. The good thermal properties and formability make the SA/EG composite PCM show great potential in latent heat storage systems. © 2013 Elsevier Ltd.

Zhang Z.,South China University of Technology | Shi G.,South China University of Technology | Wang S.,South China University of Technology | Fang X.,South China University of Technology | Liu X.,Guangdong Industry Technical College
Renewable Energy | Year: 2013

Here we demonstrate thermal energy storage cement mortar (TESCM) fabricated by integrating ordinary cement mortar with a composite phase change material (PCM) based on n-octadecane and expanded graphite (EG). The mass percentage of n-octadecane in the composite PCM can reach as high as 90% due to the excellent adsorption ability of EG, which endows the composite PCM with large latent heat. SEM images of the composite PCM show that n-octadecane is adsorbed into the pores of EG and uniformly covers on the nanosheets of EG, which microstructure contributes to preventing leakage of melted n-octadecane after it changes phase from solid state to liquid state. The n-octadecane/EG composite PCM has a good compatibility with ordinary cement mortar, and does not obviously deteriorate the apparent densities of the TESCM samples. Based on the thermal energy storage performance evaluation, it is found that the TESCM containing the n-octadecane/EG composite PCM plays a role in reducing the variation of indoor temperature, which helps to decrease the energy consumption for buildings. © 2012 Elsevier Ltd.

Fu L.,Guangdong Industry Technical College
2011 International Conference on Information Science and Technology, ICIST 2011 | Year: 2011

With the improvement of living standards, shopping malls are bigger after constructing with more abundant goods and more variety of wares. Therefore, building a simple, fast and convenient shopping guide system has become a mutual concern of merchants and customers. In view of the mobile phone has become a popular consumer products, a simple optimization method was given to design shopping guide system run on smart phones, with the help of QR code generation and recognition technology. The proposed programs can show accurate and realtime shopping destination, thus help shopping mall to mine customer data more accurately and scientifically. © 2011 IEEE.

Gu L.L.,Guangdong Industry Technical College
Control Engineering and Information Systems - Proceedings of the International Conference on Control Engineering and Information System, ICCEIS 2014 | Year: 2015

Fault-tolerant technique is an effective means to recover web service composition runtime error. In the service composition process, functional business logic code is entangled with fault-tolerant logic code, it causes the code maintenance difficulties and poor system scalability. Aiming at the problem, fault types that cause service failure in web service composition runtime are analyzed, appropriate faulttolerant strategy are presented, and fault-tolerant model of web service composition runtime are built based on separation of concerns. While ensuring the service function and quality of service, function concerns and fault-tolerant concerns are separated. Finally, the analysis for case study of setup planning is presented to verify the feasibility of the method. By the example analysis the feasibility and efficiency of the method are verified. © 2015 Taylor & Francis Group, London.

A self-cleaning plasticizing venting and extruding apparatus by co-rotating non-twin multi-screws and a method thereof are provided, said apparatus comprises a screw mechanism, a barrel (1), a feeding port (2), a venting port (4), a discharging port (5), and a driving mechanism, said screw mechanism comprises non-uniform shaped central screw (6) and lateral screws (3,13), the axis of the central screw (6) is coincided with that of the barrel (1), and the lateral screws are provided on both sides of the central screw (6) respectively and engaged with the central screw (6); the contour lines of the threads of said central screw (6) and said lateral screws (3,13) are tangent to the inner wall of the barrel (1) ; and said driving mechanism is connected to the central screw (6) and the lateral screws (3,13) respectively. Each of the screws in the present invention uses an asymmetrical flow channel geometrical shape, so that the flow spaces for materials have an asymmetry, the compounding intensity and effectiveness are overall enhanced; the dispersion and mixing effects are extremely excellent, and a self-cleaning effect is generated, so that it is especially suitable for processing nano-materials in high yield.

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