Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology

Wuxi, China

Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology

Wuxi, China
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Pu H.,Jiangnan University | Pu H.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology | Wang D.,Jiangnan University | Li Z.,Jiangnan University | Li Z.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2017

For the purpose of testing the watermelon's interior quality nondestructively, the sub-band spectrum centroid of the impact vibration response was employed as the characteristic parameter to describe and model the soluble solid content (SSC) and the flesh color of watermelon. A total of 76 watermelon samples were used in the experiments, for both the nondestructive vibration tests and the destructive SSC and color tests. Different impact methods and positions were attempted to validate the robustness of the sub-band spectrum centroid as a characteristic parameter. The results showed that the sub-band spectrum centroid had low dependency on different impact methods and positions, which could greatly simplify the complexity of the testing system. The optimized sub-bands were obtained for modeling the SSC and the a* value of color with determination coefficients of 0.812 4 and 0.733 6, respectively, which were higher than that when the resonant frequencies were used as the characteristic parameter. Linear models were made for both SSC and a* value. The vibration sub-band spectrum centroid was gone down monotonously along with the SSC (sub-band 144~416 Hz) and a* (sub-band 148~428 Hz) value, with the slope of -1.361 and -1.019, respectively. However, the sub-band spectrum centroid had low ability of describing the L* and b* values in color testing, whose determination coefficients were only 0.52 and 0.148, respectively. © 2017, Chinese Society of Agricultural Machinery. All right reserved.


Pu G.,Jiangnan University | Song G.,Wuxi Institute of Technology | Song C.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology | Wang J.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology
Innovative Food Science and Emerging Technologies | Year: 2017

A 3D mathematical food model of Coupled Hot-air and Microwave (CTMW) heating was developed to understand complex microwave interactions in food. The heating process at different position of potato using CTMW heating was investigated numerically and experimentally. Simulated spatial temperature profiles were compared with experimental ones, and predict spatial temperature profiles were in good agreement with experimental ones. In this study, the effect of the potato's position inside cavity was studied. The simulation results were analyzed and evaluated. The results showed the loss power values& density distribution at different position of potato varied greatly, which directly led to the potatoes in the uneven distribution of temperature field. The results are useful in understanding complex microwave heating, designing CTMW heating systems. © 2017


Hao F.,Jiangnan University | Lu L.,Jiangnan University | Lu L.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology | Wang J.,Jiangnan University | Wang J.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology
Journal of Food Process Engineering | Year: 2017

A mathematical model based on unsteady-state mass transfer of water was developed to simulate the moisture migration in multicomponent foods, and the mathematical model was numerically solved by finite element method (FEM) using COMSOL Multiphysics program. The moisture absorption properties and effective moisture diffusivity of each food component were investigated independently. Simulated results were validated with experimental multicomponent food systems constituted of biscuits in contact with hawthorn sheets and agar gel. The agar gel (water activity 0.786)-biscuit (water activity 0.161) system and the hawthorn sheets (water activity 0.643)-biscuit system were packed in impermeable packaging to investigate the moisture migration evolution. The difference in water activity gradient of two food systems resulted in different moisture migration evolution, and then eventually influenced the storage stability of multicomponent foods. It is found that the FEM-simulated equilibrium moisture content and the time required to reach equilibrium were favorably in agreement with experimental results. Practical Applications: Moisture migration is an increasing cause for quality deterioration, such as the undesirable textural changes, of multicomponent food. Difference in water activity between components is the driving force for moisture migration as the system comes to equilibrium. Moisture will migrate from a region of high water activity to a region of lower water activity. Control of initial water activity gradient and moisture migration is critical to the quality and safety of multicomponent foods. Finite element method is developed that can be used for simulating moisture migration in multicomponent food products during storage. The results of this study would have practical applications in exploiting new multicomponent foods and predicting the shelf life of multicomponent foods. © 2016 Wiley Periodicals, Inc.


Sun L.-N.,Jiangnan University | Lu L.-X.,Jiangnan University | Lu L.-X.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology | Qiu X.-L.,Jiangnan University | And 3 more authors.
Food Control | Year: 2017

Antioxidant active packaging films are always prepared to help protect fatty food safety. In this study, a new LDPE (Low-Density Polyethylene) film containing α-tocopherol adsorbed on MCM-41 mesoporous molecular sieve was prepared by extrusion. The synthesized MCM-41 were thoroughly characterized before and after loading with α-tocopherol by powder X-ray diffraction, nitrogen adsorption isotherms, infrared spectroscopy, and thermogravimetric analysis. Physical properties of the new films including tensile strength, oxygen and water barrier properties were studied. In particular, the effect of loading α-tocopherol onto MCM-41 on the migration behavior of α-tocopherol from active films was investigated. Migration test were performed at 40 °C, using 95%(v/v) ethanol as fatty food simulants on LDPE films with pure α-tocopherol and the assembly of α-tocopherol and MCM-41. The results showed that, after being adsorbed on MCM-41, the releasing period of α-tocopherol in LDPE were prolonged by about 36%, and the diffusivity of the antioxidant decreased by 53%. Moreover, DPPH radical scavenging assay proved the effectiveness of the antioxidant in the new film. These demonstrated that the new kind of active film can be potentially used for controlled release antioxidant food packaging application. © 2016 Elsevier Ltd


Liu K.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology | Cao Y.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology | Ge S.-Y.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology | Ding R.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology
2016 IEEE International Conference on Robotics and Biomimetics, ROBIO 2016 | Year: 2016

This paper introduces a planar two-degree of freedom (2-DoF) compliant rotational hinge which can achieve rotation in-plane and out-of-plane to promote the flexibility of Lamina Emergent Mechanisms (LEMs). The theory models of rotational equivalent stiffness around y-axis and z-axis for the planar 2-DoF compliant rotational hinge were inferred respectively using appropriate spring models. Then a finite element analysis was used to prove the reliability of the theoretical models. Finally, an optimal model was built to improve the rotational performance of planar 2-DoF compliant rotational hinge, and all the structure dimensions were optimized by particle swarm optimization algorithm with penalty function. The optimization results show that the rotational performance was improved observably with the rotational stiffness around y-axis and z-axis were reduced by 80.5% and 89.4% separately, which also was in line with expectations. © 2016 IEEE.


Chen X.,Jiangnan University | Chen X.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology | Zhang Q.,Jiangnan University | Zhang Q.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology | And 2 more authors.
M2VIP 2016 - Proceedings of 23rd International Conference on Mechatronics and Machine Vision in Practice | Year: 2016

Non-geometric errors mainly caused by the joint compliance should be identified and compensated as well as geometric errors to improve the accuracy. This paper presents a new comprehensive error model consisting of both geometric and compliance parameters. A new approach is proposed for intelligent selection and optimization of measurement poses based on interference detection method and linearly decreasing weight particle swarm optimization (LinWPSO) algorithm. Simulation results on a 6-DOF serial industrial robot demonstrate that using the optimal measurement poses can significantly improve the calibration accuracy and measurement efficiency. © 2016 IEEE.


Han P.,Jiangnan University | Qiu X.,Jiangnan University | Qiu X.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology | Lu L.,Jiangnan University | And 3 more authors.
Energy Conversion and Management | Year: 2016

MicroPCMs (microencapsulated phase-change materials) were successfully synthesized using PMMA (poly(methyl methacrylate)) and UF (urea-formaldehyde) as raw materials for hybrid shells, and n-tetradecane as core materials. NMA (n-methylol acrylamide) with two functional groups of double-bond and hydroxymethyl was used as a crosslinking agent. The morphologies and chemical structures of microPCMs were characterized using scanning electron microscopy (SEM) and Fourier transformed infrared (FTIR) spectroscopy. The agglomerations of the UF/PMMA hybrid samples might be influenced by two factors: cross linking action of NMA and PMMA/UF ratio in shell materials. The phase change properties and thermal durability were investigated by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA), respectively. The UF/NMA/PMMA hybrid shell microcapsules has an enthalpy of 175.5 J/g which is higher than the single-layer shell samples of PMMA and UF, and a better leakproofness than the UF/PMMA hybrid samples without NMA owing to the semi-IPN microstructure. Likewise, the UF/NMA/PMMA hybrid samples have higher thermal durability than the single layer shell samples of PMMA and UF and the UF/PMMA hybrid samples without NMA. Moreover, the thermal cycling test of the UF/PMMA hybrid samples with NMA was carried out for 100 heating/cooling cycles and indicated that the developed hybrid shell microPCMs have good chemical stability and thermal reliability. The heating-up experiment revealed that the foam treated by microcapsules had a better thermoregulatory property than the raw foam. Based on the results obtained, it can be concluded that n-tetradecane/UF/PMMA microPCMs have potential thermal energy storage applications. © 2016


Chen H.-W.,Jiangnan University | Chen H.-W.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology | Zhang Q.-J.,Jiangnan University | Zhang Q.-J.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology
Shock and Vibration | Year: 2016

This paper studies dynamics of a three-column centrifuge and tries to design a ball balancer to suppress its vibration and increase its operating speed. At first, two vibration models with and without the balancer are introduced. Then modal analysis of the centrifuge itself is carried out with two isolated natural frequency groups identified. Centrifugal forces acting on the system at the steady state are analyzed and a tip-over phenomenon is discovered and validated through simulations. A ball balancer is adopted in the centrifuge and several potential tip-over phenomena related to the balancer are studied. At last, a comparison between dynamics of the centrifuge before and after the balancer is installed is made with benefits and side effects of the balancer presented. © 2016 Hai-Wei Chen and Qiu-Ju Zhang.


Meng J.,Jiangnan University | Wu L.,Jiangnan University | Qian J.,Jiangnan University | Qian J.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology
Lecture Notes in Electrical Engineering | Year: 2016

The demand for reproduction of printing color vastly expands, which significantly promotes the application of the spot-color ink. To improve the accuracy and practicability of color matching, the Kubelka-Munk color-matching theory and the improved spectrophotometric uniform color space weight factor color-matching method are applied to construct two matching models. The four-color (C, M, Y, W) model is established on the basis of three-color model (C, M, Y), and the derivations of the two models will be shown. In addition, a new experimental program is designed for ink toner to obtain the basic data of color matching. Prediction recipes are obtained by using MATLAB software for matrix arithmetic. And the accuracy and practicability of color-matching models are verified through the experiment. The results show that two models are feasible for better utility of the spot-color matching. © Springer Science+Business Media Singapore 2016.


Li H.-W.,Jiangnan University | Wang J.,Jiangnan University | Wang J.,Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology
Journal of Vibroengineering | Year: 2015

A novel method combining max-min approach (MMA) with energy method is proposed for the derivation of the approximate analytical solution for shock response of the strong nonlinear system. MMA is used to evaluate the governing differential equation with nonlinearity terms and to obtain the approximate solution. The maximum shock response displacement of the system is obtained by energy method, and then the approximation solution by MMA is corrected. Three examples are given to illustrate the validity of the method. It is shown that the corrected MMA method always lead to a better approximate solution for different kinds of nonlinear problems. The results provides a new simple but effective method for the analysis of shock response of strong nonlinear problems. © 2015, JVE INTERNATIONAL LTD.

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