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Zhang H.,Hongyun Honghe Tobacco Group Co. | Lu X.,Hongta Tobacco Group Co. | Wang J.,Hongta Tobacco Group Co.
Tobacco Science and Technology | Year: 2014

For preventing emulsion adhesive from developing a solid layer on its surface, an emulsion adhesive stirring and water compensating device was designed and applied to a CT cartoner. Driven by an independent motor, the device stirred the adhesive continuously when the machine was stopped temporarily. The automatic water compensating to adhesive was controlled by a PLC control system. The results of application showed that the solid surface layer was effectively reduced, thereby adhesive waste dropped from 4.22 to 1.08 kg/machine per week. Moreover, the consistence of emulsion adhesive were guaranteed, and maintenance work was decreased.

Tai Z.,Yunnan University | Cai L.,Yunnan University | Dai L.,Kunming University of Science and Technology | Dong L.,Yunnan University | And 4 more authors.
Food Chemistry | Year: 2011

The antioxidant activities of crude extract and its derived soluble fractions from the flower of Sophora viciifolia were evaluated in five different test systems (DPPH, ABTS, FRAP, reducing power and inhibition of lipid peroxidant models) for the first time. The ethylacetate soluble fraction exhibited the highest antioxidant effect. Correlation analysis suggested that the flavonoids might be the major contributors for the high antioxidant activity of this flower. In addition, 11 compounds were isolated from this flower, and the antioxidant capacities of 5 flavonoids were evaluated by DPPH assay. Compound 3 (luteolin) had a significant DPPH radical-scavenging activity, and was also present at the highest concentration (5.56 mg/g dry sample), implying an important role of 3 for the antioxidant activity of this flower. The study suggests that the flower of S. viciifolia can provide valuable functional ingredients and can be used for the prevention of diseases related to various oxidant by-products of human metabolism. © 2010 Elsevier Ltd. All rights reserved.

Li Z.,Yunnan Academy of Tobacco Science | Zhan D.-J.,Central South University | Wang J.-J.,Hongyun Honghe Tobacco Group Co. | Huang J.,Yunnan Academy of Tobacco Science | And 5 more authors.
Analyst | Year: 2013

Backgrounds existing in the analytical signal always impair the effectiveness of signals and compromise selectivity and sensitivity of analytical methods. In order to perform further qualitative or quantitative analysis, the background should be corrected with a reasonable method. For this purpose, a new automatic method for background correction, which is based on morphological operations and weighted penalized least squares (MPLS), has been developed in this paper. It requires neither prior knowledge about the background nor an iteration procedure or manual selection of a suitable local minimum value. The method has been successfully applied to simulated datasets as well as experimental datasets from different instruments. The results show that the method is quite flexible and could handle different kinds of backgrounds. The proposed MPLS method is implemented and available as an open source package at http://code.google.com/p/mpls. © 2013 The Royal Society of Chemistry.

Zhang S.,Qujing Normal University | Ning D.,Qujing Normal University | Wang L.,Hongyun Honghe Tobacco Group Co.
Tobacco Science and Technology | Year: 2015

The foreign matter rejecting performance of a tobacco sorting system decreases with the attenuation of illumination, therefore the function of image intensification was incorporated on the basis of optimized Gauss homomorphic filtering algorithm. The image of tobacco leaf under low illumination was converted swiftly from its RGB (Red-Green-Blue) space into an HSV (Hue-Saturation-Value) space in order to separate color from luminance, and the luminance component V was intensified by a real-time spatial homomorphic filter, then stretched by an introduced adaptive coefficient, finally HSV was converted into RGB. The results showed that this method could effectively correct the color, contrast and luminance of an image under low illumination, well balance uneven illumination. The modified system maintains its good rejecting performance, features better maintainability and operational convenience. Comparing with other image intensification algorithms, this method features better self-adaptability and faster processing speed and is more applicable to real-time intensification of color images. ©, 2015, Editorial Office of Tobacco Science and Technology. All right reserved.

Li L.,University of Sichuan | Zhou M.,University of Sichuan | He P.,University of Sichuan | Wang D.,Hongyun Honghe Tobacco Group Co. | Yu J.,University of Sichuan
Tobacco Science and Technology | Year: 2015

To solve the problem that slivers tended to jam in the conveying system in PROTOS M5 cigarette maker, a model of pipeline was developed with Solid Works software. By simulating the air flowing in the pipeline with Fluent analysis software, the pressure and air flow in the pipeline were analyzed to find out the reasons causing sliver jam. Then the device was optimized as following: instead of the bend pipe with a vibrating trough to shorten the length of conveying pipeline; having the longer slivers cut to prevent them from blocking the bend pipes; connecting sliver container to the centralized vacuum source with a straight pipe to reduce pressure loss. The results showed that: 1) The pipeline tended to be blocked when vortex flow appeared at the same cross section or the maximum curvature of pipeline, or the flow rate was zero at the maximum bend, or the pressure in pipeline dropped drastically. 2) After improvement, the pressure and air flow distributed uniformly in pipeline, the pressure loss in pipeline reduced from 452.8 to 245.5 Pa, and the blocking of pipeline was effectively avoided. ©, 2015, Editorial Office of Tobacco Science and Technology. All right reserved.

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