Guangzhou City Polytechnic

Guangzhou, China

Guangzhou City Polytechnic

Guangzhou, China
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Zhang Y.,Guangdong Academy of Agricultural Sciences | Liu X.,Guangdong Academy of Agricultural Sciences | Huang L.,Guangzhou City Polytechnic | Chen Z.,Guangdong Academy of Agricultural Sciences | Cheng J.,Guangdong Academy of Agricultural Sciences
Food Chemistry | Year: 2017

The functionality and structural properties of pig skin hydrolysates with different degrees of hydrolysis (DH, 10% and 20%) and microfluidisation (120 MPa), prepared by pepsin and Alcalase® have been investigated in this study. Extensive hydrolysis can significantly improve the absolute value of the zeta potential and surface hydrophobicity. The particle distribution of hydrolysates decreased with increasing DH. The numbers of free sulfhydryl (SH) and disulfide bonds (SS) were significantly increased with increasing DH (p < 0.05). Hydrolysates with a lower DH showed a better emulsifying property than those with a higher DH. Microfluidisation led to the transformation of structural and interfacial properties of the hydrolysates and increased the value of the zeta potential, S0, and gel strength. Microfluidisation results in limited breakage of chemical bonds, the number of SS and SH bonds unchanged in the treatment. These results reflect the functionality and structural properties of collagen-rich pig skin hydrolysates. © 2017 Elsevier Ltd

Related Vehicle Routing Problem is another form of Vehicle Routing Problem. RVRP also belongs to NP-Hard with a wide range of application areas and major economic value. The research based on single distribution center RVRP with road capacity static constraint, to build a model of single distribution RVRP and propose a kind of chaos genetic algorithm to solve this problem, with experiments verify the feasibility and effectiveness of the algorithm. © (2013) Trans Tech Publications, Switzerland.

Yang W.J.,Guangzhou City Polytechnic
Applied Mechanics and Materials | Year: 2013

The research based on complex RVRP. On the basis of deep analysis, a parallel genetic algorithm was designed. Simulation results proved that the parallel genetic algorithm is more excellent than conventional serial genetic algorithm. © (2013) Trans Tech Publications, Switzerland.

Wu C.,Fujian Agriculture and forestry University | Peng S.,Guangzhou City Polytechnic | Wen C.,Fujian Agriculture and forestry University | Wang X.,Fujian Agriculture and forestry University | And 3 more authors.
Carbohydrate Polymers | Year: 2012

A series of novel edible blend films of konjac glucomannan (KGM) and curdlan were prepared by a solvent-casting technique with different blending ratios of the two polymers. The Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), etc. were used to characterize the change of structure and properties of blend films. The results showed that the strong intermolecular hydrogen bonds took place between KGM and curdlan. And the interaction of the blend film was much greater than that of the others when the KGM content in the blend films was around 70 wt% (KC7), resulting in excellent miscibility. The conclusion of the electron tensile testing analysis indicated that the blend film KC7 showed the maximum tensile strength (42.93 ± 1.92 MPa). In addition, the blend films displayed excellent moisture barrier properties, which had a potential application in the food field. © 2012 Elsevier Ltd. All rights reserved.

Jiang C.-C.,Guangzhou City Polytechnic
Advances in Information Sciences and Service Sciences | Year: 2012

Supply chain is one of the sources of the enterprises competitive advantage. Enterprises can reduce time and cost of and enhance enterprise performance through supply chain management. But the mechanism of action has not so clear. In the capacity-based view, the article builds the mechanism model between supply chain coordination ability, reconstruction ability and enterprise performance. And then draw the conclusion by constructing a structural equation model and empirical analysis. Supply chain coordination ability includes four dimensions: supply chain management tools, supply chain management organization, supply chain operation team and supply chain information system. Reconstruction ability includes two dimensions: flexibility ability and agility ability. Supply chain coordination ability promotes directly enterprise performance; reconstruction ability promotes directly enterprise performance and promotes indirectly enterprise performance through coordination ability.

Mai Y.,Guangzhou City Polytechnic | Jiang C.-C.,Guangzhou City Polytechnic
Advances in Information Sciences and Service Sciences | Year: 2012

By sharing resources, capacities and network environment the supply chain would provide the advantages of sharing advantages, low search costs and other advantages in the chain, and then brings competitive advantage for enterprises. Through theoretical and empirical analysis the article puts forward the following ideas: operation capacity of the supply chain consists of three dimensions of strategic design capabilities, supply chain structure and relationship management; knowledge management of the supply chain includes four dimensions of search, knowledge encoding, knowledge sharing and knowledge internalization; competitive advantage includes two dimensions of financial performance and non-financial performance. By empirical research on the survey data from 70 enterprises of the supply chain upstream and downstream enterprises using structural equation modeling, it was found that: supply chain operation capacity has a significant direct positive effect on the competitive advantage; the supply chain knowledge management capacity is the ability to adapt to environmental change which has a significant positive effect on the competitive advantage; the knowledge management capacity would promote the operation capacity.

Hu C.,China Electronic Product Reliability and Environmental Testing Research Institute | Zhou L.,Guangzhou City Polytechnic
Proceedings of the Electronic Packaging Technology Conference, EPTC | Year: 2014

As an important packaging material, much work has been done in an attempt to improve DGEBA epoxy resins to be used in electric industry. In order to improve heat resistance, the cross-linking density of epoxy resins has been attempted to increase, or rigid groups have been introduced to copolymerize with epoxy resin. However, these methods have been confirmed that they will induce friability. In addition, as Si-O-Si bonding is more flexible than C-C bonding, siloxane oligomer is introduced to the matrix to improve toughness of epoxy resins, but the glass transition temperature (Tg) becomes lower by reason of low compatibility between epoxy resin and siloxane. Moreover, the pure epoxy resins are flammable. It is worth notice that halogen-containing resins are considered to limit the use by reason that they will release toxic gases while heating. Phosphorus-containing epoxy resins could substitute for halogen-containing resins for the use of flam-retardant. The introductions of phosphoric ethers, DOPO or its derivatives to the matrix have been reported. Such methods are confirmed to improve flam-retardant with epoxy, but The decreasing of heat resistance and toughness can't be ignored when too much phosphorus is in the resins. From the above, it is known that present achievements can improve the property of epoxy resins at one side, but they can not improve or at least keep the other properties. In this study, a kind of novel silicon, phosphorus-containing hybrid material was prepared and it could be used as the modifier of DGEBA epoxy resins. The thermal stability, toughness and flam-retardant of the modified resins were all improved. For one thing, the hybrid material was mainly composed of polysiloxane, and the Si-O-Si chains in the matrix would improve toughness for the resins. For another, the hybrid material contained a lot of hydroxyl groups in the structure. The compatibility with epoxy resins and the modifier is good. The Si-OH groups in the hybrid material could react with the hydroxyl groups in DGEBA when the resins were cured. The heat resistance was improved on account of higher cross-linking density of the resins. What's more, phosphorus-containing groups were introduced in the hybrid material. P and Si could both act to exhibit the considerable synergistic effect on flam-retardant even though the weight of P was low. In this paper, the thermal, mechanical and flammable properties of the cured samples were investigated in detail by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), as well as tensile, impact and limited oxygen index (LOI) testing. The result showed that the hybrid modified epoxy resins exhibited good thermal stability, toughness and flam-retardant property. With the ratio m(DGEBA): m(SPCH)=100: 25, Tg of the modified sample was 49.35 °C higher than that of the pure sample, and LOI was raised from 21.5 to 29.8. The char yield of E-25 at 800°C reached to 37.8 %, which compared to 12.9 % of the pure sample. But the toughness of E-25 was not so prominent if compared with E-15. The impact stress of sample E-15 reached to 24.1 kJ·m-2. For all modified samples, the tensile strengths were all basically maintained. SEM micrographs of the fracture surfaces indicated that these modified resins were homogeneous and tough. In the practical application, the different ratios of the modifier in epoxy resin were chosen with actual demand. © 2014 IEEE.

Yang W.,Guangzhou City Polytechnic | Yang Y.,Guangzhou City Polytechnic | Chen Y.,Guangzhou City Polytechnic
Proceedings - 2014 10th International Conference on Computational Intelligence and Security, CIS 2014 | Year: 2015

A kind of detection and control system is proposed in this paper, which is high-performance and intelligent. It used the high-performance Cortex-M3 as the hardware platform, built-in UCOS-II as the operating system, 3.2 inches touch screen as human-computer interaction interface. Multi-channel data acquisition, real-time monitoring, and output control based on PWM can be realized in this system. The experimental platform is presented to demonstrate that the system proposed in this paper is clear in function distinction, high in integration level, stable operation, friendly in human-computer interaction interface and easy operation. © 2014 IEEE.

Zhang Y.-H.,Guangdong Academy of Agricultural Sciences | Huang L.-H.,Guangzhou City Polytechnic
Food Science and Biotechnology | Year: 2014

The effects of heat-induced rice bran protein (RBP) fibrils on structure and properties of solutions and gels in a complex system were investigated using transmission electron microscopy (TEM), atomic force microscopy (AFM), Congo red spectral analysis, and circular dichroism (CD). Planar and 3-dimensional images of RBP fibrils all revealed structural details. A Congo red spectral shift indicated fibril formation. Fibril secondary structural components exhibited differences at pH 2.0 and pH 7.0. The β-type was decreased with an increased pH. Rheological results exhibited shear thinning behavior for all solutions. Addition of fibrils to RBP solutions, which made the system complex, resulted in an order of magnitude increase in viscosity and shear stress. Adding fibrils to RBP solutions accelerated the kinetics of gel formation, resulting in an increase in gel strength. Scanning electron microscopy (SEM) images showed gel network structural differences with and without fibrils at different pH values. © 2014, The Korean Society of Food Science and Technology and Springer Science+Business Media Dordrecht.

Yang W.,Guangzhou City Polytechnic | Chen Y.,Guangzhou City Polytechnic
Journal of Computational Information Systems | Year: 2015

Finding a path between a source-destination node pair that satisfies two or more end-to-end constraints is a fundamental problem in Quality-of-Service (QoS) routing. To the best of our knowledge, it is NPhard and has no solution in polynomial time. Different from existing algorithms, a fast approximation scheme (FAS) was proposed in this paper, at finding such a path for multiple constrained optimal paths (MCOP) problem. By analyzing the proposed algorithm theoretically, the presented FAS can find an approximation path with the ratio of (1+ε) and the time complexity O (mQK-1) (where m is the number of edges, Q is the positive real number and K is the number of constraints) in the network, which outperforms the previous best-known algorithm for MCOP. Copyright © 2015 Binary Information Press.

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