2017 Vol. 32, No. 1
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2017, 32(1)
:1-6.
doi: 10.3969/j.issn.2096-1553.2017.1.001
Abstract:
With the development of the society and continuous improvement in living standards,the dietary pattern of people has changed significantly,followed by the increasing prevalence of the metabolic syndrome,including obesity,hyperglycemia,hyperlipidemia and hypertension.Moreover,the modern fast-paced lifestyle has driven the increase in the incidence of subtealth state and chronic disease,which leads to huge social burden.The marine food is considered as favovable food and heath-care sources due to the abundant bioactive peptides,functional lipids, polysaccharides,vitamins and minerals.Therefore,it is imperative to focus on the nutrition and health,explore the structure-activity relationship among the functional factors in marine food,clarify the potential molecular mechanisms,strengthen the research of relationship between nutrients and human health,promote the high value processing of marine food,innovate and develop the marine food industry so as to improve the life quality and health state of people.
With the development of the society and continuous improvement in living standards,the dietary pattern of people has changed significantly,followed by the increasing prevalence of the metabolic syndrome,including obesity,hyperglycemia,hyperlipidemia and hypertension.Moreover,the modern fast-paced lifestyle has driven the increase in the incidence of subtealth state and chronic disease,which leads to huge social burden.The marine food is considered as favovable food and heath-care sources due to the abundant bioactive peptides,functional lipids, polysaccharides,vitamins and minerals.Therefore,it is imperative to focus on the nutrition and health,explore the structure-activity relationship among the functional factors in marine food,clarify the potential molecular mechanisms,strengthen the research of relationship between nutrients and human health,promote the high value processing of marine food,innovate and develop the marine food industry so as to improve the life quality and health state of people.
2017, 32(1)
:7-12.
doi: 10.3969/j.issn.2096-1553.2017.1.002
Abstract:
The effect of different metal ions on the antioxidant activity of Maillard reaction products (MRPs)was studied as determined by ·OH radical scavenging activity,total reducing power and absorbance value.The results showed that the ·OH radical scavenging activity and reducing power of MRPs was not altered following Na+ and K+ treatment.However,Fe2+ and Cu2+ treatment exerted significant effects on the ·OH radical scavenging activity of MRPs (P<0.05),while Mg2+,Ca2+,Zn2+,Cu2+,Fe2+ and Fe3+ treatment remarkably affected the reducing ability of MRPs (P<0.05).Notably,there was obviously negative relationship between Cu2+,Fe2+ and Fe3+ concentrations and the antioxidant capacity of MRPs (P<0.05).Moreover,significant correlation between the browning degree of Maillard reaction and metal ions was also obtained (P<0.05),indicating the potential effect of browning degree on the antioxidant activity of MRPs.
The effect of different metal ions on the antioxidant activity of Maillard reaction products (MRPs)was studied as determined by ·OH radical scavenging activity,total reducing power and absorbance value.The results showed that the ·OH radical scavenging activity and reducing power of MRPs was not altered following Na+ and K+ treatment.However,Fe2+ and Cu2+ treatment exerted significant effects on the ·OH radical scavenging activity of MRPs (P<0.05),while Mg2+,Ca2+,Zn2+,Cu2+,Fe2+ and Fe3+ treatment remarkably affected the reducing ability of MRPs (P<0.05).Notably,there was obviously negative relationship between Cu2+,Fe2+ and Fe3+ concentrations and the antioxidant capacity of MRPs (P<0.05).Moreover,significant correlation between the browning degree of Maillard reaction and metal ions was also obtained (P<0.05),indicating the potential effect of browning degree on the antioxidant activity of MRPs.
2017, 32(1)
:13-20.
doi: 10.3969/j.issn.2096-1553.2017.1.003
Abstract:
The nutritional composition between Paracobitis anguillioides and Misgurnus anguillicaudatus was compared. The results showed that the skin of Paracobitis anguillioides and Misgurnus anguillicaudatus contained lower water contents (-13.03%, P<0.05; -10.30%, P<0.05) but higher protein contents (+54.22%, P<0.05; +9.60%, P<0.05) when compared with those in muscle. Moreover, the skin of both Paracobitis anguillioides and Misgurnus anguillicaudatus possessed abundant levels of collagen when compared with those in muscle (61.76 mg/g vs. 5.75 mg/g). No evident differences in amino acid composition were obtained between Paracobitis anguillioides and Misgurnus anguillicaudatus. In addition, the first limiting amino acids in muscle of Paracobitis anguillioides and Misgurnus anguillicaudatus were valine, while the first limiting amino acids in skin were threonine and methionine+cystine, respectively. Higher contents of total fat and polyunsaturated fatty acids were found in muscle of Paracobitis anguillioides and Misgurnus anguillicaudatus than those in skin (P<0.05), revealing significant differences between Paracobitis anguillioides and Misgurnus anguillicaudatus (P<0.05). As for the minerals, the muscle of Paracobitis anguillioides and Misgurnus anguillicaudatus enriched in potassium, 2 687.36 mg/kg and 1 750.49 mg/kg, respectively. Nevertheless, the skins had abundant contents of calcium, up to 4 091.83 and 5 948.43mg/kg, respectively.
The nutritional composition between Paracobitis anguillioides and Misgurnus anguillicaudatus was compared. The results showed that the skin of Paracobitis anguillioides and Misgurnus anguillicaudatus contained lower water contents (-13.03%, P<0.05; -10.30%, P<0.05) but higher protein contents (+54.22%, P<0.05; +9.60%, P<0.05) when compared with those in muscle. Moreover, the skin of both Paracobitis anguillioides and Misgurnus anguillicaudatus possessed abundant levels of collagen when compared with those in muscle (61.76 mg/g vs. 5.75 mg/g). No evident differences in amino acid composition were obtained between Paracobitis anguillioides and Misgurnus anguillicaudatus. In addition, the first limiting amino acids in muscle of Paracobitis anguillioides and Misgurnus anguillicaudatus were valine, while the first limiting amino acids in skin were threonine and methionine+cystine, respectively. Higher contents of total fat and polyunsaturated fatty acids were found in muscle of Paracobitis anguillioides and Misgurnus anguillicaudatus than those in skin (P<0.05), revealing significant differences between Paracobitis anguillioides and Misgurnus anguillicaudatus (P<0.05). As for the minerals, the muscle of Paracobitis anguillioides and Misgurnus anguillicaudatus enriched in potassium, 2 687.36 mg/kg and 1 750.49 mg/kg, respectively. Nevertheless, the skins had abundant contents of calcium, up to 4 091.83 and 5 948.43mg/kg, respectively.
2017, 32(1)
:21-27.
doi: 10.3969/j.issn.2096-1553.2017.1.004
Abstract:
With Crassostrea rivulari as materal,response surface methodology based on Box-Behnken design of experiments was used to analyze the effect of the microwave and hot-air drying on the sensory evaluation of non-fried instant oyster.The results showed that wht optimal process para meters of microwave and hot-air drying were obtained under conditiion of microwave drying power 300 W,microwave drying time 60 s,hot-air drying tempeature 60℃ and hot-air drying time 60 min.The color, texture and shape of non-fried instant oyster were significantly improved under the optimal process conditions.
With Crassostrea rivulari as materal,response surface methodology based on Box-Behnken design of experiments was used to analyze the effect of the microwave and hot-air drying on the sensory evaluation of non-fried instant oyster.The results showed that wht optimal process para meters of microwave and hot-air drying were obtained under conditiion of microwave drying power 300 W,microwave drying time 60 s,hot-air drying tempeature 60℃ and hot-air drying time 60 min.The color, texture and shape of non-fried instant oyster were significantly improved under the optimal process conditions.
2017, 32(1)
:28-34.
doi: 10.3969/j.issn.2096-1553.2017.1.005
Abstract:
The change regularity of heat in adsorption and desorption process of tobacco was investigated,flue-cured tobacco,tobacco sheet,expanded stem,burley tobacco,oriental tobacco as the research objects.With equilibrium water content and water activity with different relative humidity were determined by static sulfuric acid method.The moisture sorption isotherms of tobacco,the water content of the single molecule layer and net isosteric heat of sorption were studied.Results indicated that:1) GAB isotherm model was the tobacco optimal moisture sorption isotherms; 2) The variation range of single molecular layer water in tobacco samples was 0.046~0.103 g/g; 3) The net isosteric heat of sorption decreased with the increase of water content.Under the normal water content conditions,burley tobacco,oriental tobacco,flue-cured tobacco,tobacco sheet,expanded stem required for moisture evaporation energy were in descending order.
The change regularity of heat in adsorption and desorption process of tobacco was investigated,flue-cured tobacco,tobacco sheet,expanded stem,burley tobacco,oriental tobacco as the research objects.With equilibrium water content and water activity with different relative humidity were determined by static sulfuric acid method.The moisture sorption isotherms of tobacco,the water content of the single molecule layer and net isosteric heat of sorption were studied.Results indicated that:1) GAB isotherm model was the tobacco optimal moisture sorption isotherms; 2) The variation range of single molecular layer water in tobacco samples was 0.046~0.103 g/g; 3) The net isosteric heat of sorption decreased with the increase of water content.Under the normal water content conditions,burley tobacco,oriental tobacco,flue-cured tobacco,tobacco sheet,expanded stem required for moisture evaporation energy were in descending order.
2017, 32(1)
:35-42,64.
doi: 10.3969/j.issn.2096-1553.2017.1.006
Abstract:
A high performance liquid chromatography-diode array detector(HPLC-DAD)method was developed to determine volatile carbonyl compounds in cigarette filter including formaldehyde,acetaldehyde,propionaldehyde,acetone,acroein,crotonaldehyde,2-butanone and butyraldehyde.The cigarette filters were extracted by shaking with the mixed solution of acetonitrile and water(the volume ratio of 1: 1),then reacted with 2,4-dinitrophenylhydrazine,and analyzed by HPLC-DAD.The recoveries of 8 carbonyl compounds in cigarette filters were in the range of 80.8% and 115.7%.The precisions of intra-day and inter-day for formaldehyde,acetaldehyde and crotonaldehyde were good(RSD<10%).The trapping efficiency of carbonyl compounds in mainstream smoke for different kinds of cigarette filters was studied.The results showed that trapping efficiency of cigarette filter for total amounts of carbonyl compounds was low.Furthermore,formaldehyde and crotonaldehyde showed higher trapping efficiencies (>10%) compared with other carbonyl compounds(<7.0%).The trapping efficiencies of different types of cigarette filter to formaldehyde was activated carbon > acetate filter≈paper > polypropylene and that to crotonaldehyde was activated carbon > acetate filter > paper > polypropylene.
A high performance liquid chromatography-diode array detector(HPLC-DAD)method was developed to determine volatile carbonyl compounds in cigarette filter including formaldehyde,acetaldehyde,propionaldehyde,acetone,acroein,crotonaldehyde,2-butanone and butyraldehyde.The cigarette filters were extracted by shaking with the mixed solution of acetonitrile and water(the volume ratio of 1: 1),then reacted with 2,4-dinitrophenylhydrazine,and analyzed by HPLC-DAD.The recoveries of 8 carbonyl compounds in cigarette filters were in the range of 80.8% and 115.7%.The precisions of intra-day and inter-day for formaldehyde,acetaldehyde and crotonaldehyde were good(RSD<10%).The trapping efficiency of carbonyl compounds in mainstream smoke for different kinds of cigarette filters was studied.The results showed that trapping efficiency of cigarette filter for total amounts of carbonyl compounds was low.Furthermore,formaldehyde and crotonaldehyde showed higher trapping efficiencies (>10%) compared with other carbonyl compounds(<7.0%).The trapping efficiencies of different types of cigarette filter to formaldehyde was activated carbon > acetate filter≈paper > polypropylene and that to crotonaldehyde was activated carbon > acetate filter > paper > polypropylene.
2017, 32(1)
:43-49,102.
doi: 10.3969/j.issn.2096-1553.2017.1.007
Abstract:
The pyrolysis products of different materials of pulp for cigarette paper were investigated by using solid phase micro-extraction(SPEM)coupled with pyrolysis gas chromatography mass spectrometry(Py-GC-MS).In air atmosphere,the pulp was pyrolyzed at 300℃,500℃ and 700℃,respectively.The pyrolysis products were extracted by SPME and introduced into GC-MS with HP-5MS capillary column,and were qualitatively analyzed.The results showed that:with the increasing of the pyrolysis temperatures mentioned,the types of the pyrolysis products of hardwood pulp,softwood pulp and hemp pulp were increased,mainly with aldehydes and ketones compounds.And at 300℃ the type and amount of the pyrolysis products of hardwood pulp were most at different pyrolysis temperatures(7 types).While at 500℃ the pyrolysls products of hardwood pulp were the same in amount with that of hemp pulp(13 types).At 700℃ the pyrolysis products of the 3 types of pulp were about the same in amount (about 15 types).
The pyrolysis products of different materials of pulp for cigarette paper were investigated by using solid phase micro-extraction(SPEM)coupled with pyrolysis gas chromatography mass spectrometry(Py-GC-MS).In air atmosphere,the pulp was pyrolyzed at 300℃,500℃ and 700℃,respectively.The pyrolysis products were extracted by SPME and introduced into GC-MS with HP-5MS capillary column,and were qualitatively analyzed.The results showed that:with the increasing of the pyrolysis temperatures mentioned,the types of the pyrolysis products of hardwood pulp,softwood pulp and hemp pulp were increased,mainly with aldehydes and ketones compounds.And at 300℃ the type and amount of the pyrolysis products of hardwood pulp were most at different pyrolysis temperatures(7 types).While at 500℃ the pyrolysls products of hardwood pulp were the same in amount with that of hemp pulp(13 types).At 700℃ the pyrolysis products of the 3 types of pulp were about the same in amount (about 15 types).
2017, 32(1)
:50-57.
doi: 10.3969/j.issn.2096-1553.2017.1.008
Abstract:
Orthogonal test was investigated to optimize conditions of enzymatic hydrolysis for Pueraria with pueraria whole powder as material.Porous pueraria granule was prepared by fluid-bed granulation technology.The optimal enzymatic hydrolysis conditions were determined as enzyme concentration 0.8%,the mass ratio of glucoamylase and α-amylase was 1:1,pH value was 5.5,the reaction temperature was 50℃,and hydrolysis time was 16 h.Formulation factors of fluidized bed granulation processing were as follows:particle size of micro-porous starch was larger than 80 mesh as granulating material,and the optimized binder formulation contained 3 wt% sodium carboxymethyl starch and 5 wt% Sodium carboxymethyl cellulose mix solution.The prepared porous pueraria granule was added to cigarette filter rod to reduce the harmful ingredients in cigarette smoke and improve the cigarette sensory quality.
Orthogonal test was investigated to optimize conditions of enzymatic hydrolysis for Pueraria with pueraria whole powder as material.Porous pueraria granule was prepared by fluid-bed granulation technology.The optimal enzymatic hydrolysis conditions were determined as enzyme concentration 0.8%,the mass ratio of glucoamylase and α-amylase was 1:1,pH value was 5.5,the reaction temperature was 50℃,and hydrolysis time was 16 h.Formulation factors of fluidized bed granulation processing were as follows:particle size of micro-porous starch was larger than 80 mesh as granulating material,and the optimized binder formulation contained 3 wt% sodium carboxymethyl starch and 5 wt% Sodium carboxymethyl cellulose mix solution.The prepared porous pueraria granule was added to cigarette filter rod to reduce the harmful ingredients in cigarette smoke and improve the cigarette sensory quality.
2017, 32(1)
:58-64.
doi: 10.3969/j.issn.2096-1553.2017.1.009
Abstract:
Chitosan-polyvinyl alcohol composite hydrogel was prepared using the hydrothermal method and scanning electron microscope (SEM)was used to detect the surface morphology of the composite hydrogel.Then the adsorption ability was detected through static adsorption experiments and desorption tests in water solution and soil digestion solution,respectively.Results suggested that the chitosan-polyvinyl alcohol composite hydrogel,as material with large surface area and more pores 10~60 μm in diameter, could effectively remove arsenic from both wastewater and soil.The adsorbing capacity were 3.976 mg arsenic/g hydrogel and 3.480 mg arsenic/g hydrogel,respectively.The desorption efficiency of this composite hydrogel to arsenic was higher,and the hydrogel could be reused.The desorption efficiency were 74.7%~81.4% and 64.1%~77.0%,respectively for wastewater and soil.So the chitosan/polyvinyl alcohol composite hydrogel could effectively remove arsenic from both wastewater and soil.
Chitosan-polyvinyl alcohol composite hydrogel was prepared using the hydrothermal method and scanning electron microscope (SEM)was used to detect the surface morphology of the composite hydrogel.Then the adsorption ability was detected through static adsorption experiments and desorption tests in water solution and soil digestion solution,respectively.Results suggested that the chitosan-polyvinyl alcohol composite hydrogel,as material with large surface area and more pores 10~60 μm in diameter, could effectively remove arsenic from both wastewater and soil.The adsorbing capacity were 3.976 mg arsenic/g hydrogel and 3.480 mg arsenic/g hydrogel,respectively.The desorption efficiency of this composite hydrogel to arsenic was higher,and the hydrogel could be reused.The desorption efficiency were 74.7%~81.4% and 64.1%~77.0%,respectively for wastewater and soil.So the chitosan/polyvinyl alcohol composite hydrogel could effectively remove arsenic from both wastewater and soil.
2017, 32(1)
:65-71.
doi: 10.3969/j.issn.2096-1553.2017.1.010
Abstract:
Nano-composite bistratal antiscale coating for large chemical equipment was preparaed with epoxy modified organosilicone resin as base course material, with nano SiO2-epoxy modified organosilicone resin composite coating as surface course material. Through analyzing the ingredient ratio of each layer, and testing integrated performance of single-deck coating and double-deck coating by experiment, the results showed that hydrophobic of the bistratal composite coating could reach the best status (contact angle was 153.69°)with base course coating solvent content at 40 wt%, surface course coating resin content at 40 wt%, and namameter SiO2 content at 9.1 wt%. As single-deck coating, double-deck coating had good resistance to chemical corrosion, ideal hardness(3H) and could be solidified at 150℃. Besides, the metal adhesion and anti-adhesion property were superior to nano-composite single-deck coating. It could reach the use standard of large chemical equipment.
Nano-composite bistratal antiscale coating for large chemical equipment was preparaed with epoxy modified organosilicone resin as base course material, with nano SiO2-epoxy modified organosilicone resin composite coating as surface course material. Through analyzing the ingredient ratio of each layer, and testing integrated performance of single-deck coating and double-deck coating by experiment, the results showed that hydrophobic of the bistratal composite coating could reach the best status (contact angle was 153.69°)with base course coating solvent content at 40 wt%, surface course coating resin content at 40 wt%, and namameter SiO2 content at 9.1 wt%. As single-deck coating, double-deck coating had good resistance to chemical corrosion, ideal hardness(3H) and could be solidified at 150℃. Besides, the metal adhesion and anti-adhesion property were superior to nano-composite single-deck coating. It could reach the use standard of large chemical equipment.
2017, 32(1)
:72-81.
doi: 10.3969/j.issn.2096-1553.2017.1.011
Abstract:
Considering the high atom economy and selectivity towards hydrolysis reaction derivatives of nitriles to form amides, progress in recent years for this transformation catalyzed by different metal catalysts was reviewed such as a variety of catalysts composed of transition-metal complexes such as Mo, Ru, Rh, Pd and Au/Ag. Specially, Ru-metal catalysts was exploited deeply and draw more attention of science researcher. However, hydrolysis reaction derivatives of nitriles to form amides catalyzed by metal catalysts remains a formidable challenge, including the development of heterogeneous Ru-metal catalysts and high selectivity catalysts, bringing insight into the mechanism of homogeneous and heterogeneous catalytic reaction, seeking for new system with pure water as solvent.
Considering the high atom economy and selectivity towards hydrolysis reaction derivatives of nitriles to form amides, progress in recent years for this transformation catalyzed by different metal catalysts was reviewed such as a variety of catalysts composed of transition-metal complexes such as Mo, Ru, Rh, Pd and Au/Ag. Specially, Ru-metal catalysts was exploited deeply and draw more attention of science researcher. However, hydrolysis reaction derivatives of nitriles to form amides catalyzed by metal catalysts remains a formidable challenge, including the development of heterogeneous Ru-metal catalysts and high selectivity catalysts, bringing insight into the mechanism of homogeneous and heterogeneous catalytic reaction, seeking for new system with pure water as solvent.
2017, 32(1)
:82-88.
doi: 10.3969/j.issn.2096-1553.2017.1.012
Abstract:
In order to solve the problem of the errors of moving target tracking in indoor positioning, the ultra wide band tracking localization algorithm was proposed based on unscented Kalman filter (UKF). In indoor positioning, a combination of TOA and RSS path loss model was used to estimate a targets position to get a higher positioning accuracy; In the tracking phase, the measured values obtained by the TOA-RSS joint localization algorithm were estimated by UKF to obtain the tracking trajectory of the moving target. The simulation results showed that the filtering error and root mean square error had a certain degree of reduction and the tracking and positioning accuracy was greatly improved when TOA-RSS joint localization algorithm was estimated by EKF.
In order to solve the problem of the errors of moving target tracking in indoor positioning, the ultra wide band tracking localization algorithm was proposed based on unscented Kalman filter (UKF). In indoor positioning, a combination of TOA and RSS path loss model was used to estimate a targets position to get a higher positioning accuracy; In the tracking phase, the measured values obtained by the TOA-RSS joint localization algorithm were estimated by UKF to obtain the tracking trajectory of the moving target. The simulation results showed that the filtering error and root mean square error had a certain degree of reduction and the tracking and positioning accuracy was greatly improved when TOA-RSS joint localization algorithm was estimated by EKF.
2017, 32(1)
:89-96.
doi: 10.3969/j.issn.2096-1553.2017.1.013
Abstract:
Aiming at the problem that the positioning accuracy based on received signal strength (RSSI) algorithm was easily affected by environmental disturbance,an improved weighted centroid positioning algorithm was proposed.First,an optimal length was adopted to improve localization accuracy by analyzing the relationship between the communication distance and ranging error.Then,the localization area was divided into several honeycomb sub-regions with the optimal length according to the situation of the overall environment.And these honeycomb sub-regions developed their environmental parameters by the least squares fitting method.Last,RSSI values were filtrated by Gaussian distribution model and weighted arithmetic to ensure the reliability.The simulation results showed the improved algorithm had better efficiency and positioning accuracy,compared with the traditional weighted triangular centroid positioning algorithm.
Aiming at the problem that the positioning accuracy based on received signal strength (RSSI) algorithm was easily affected by environmental disturbance,an improved weighted centroid positioning algorithm was proposed.First,an optimal length was adopted to improve localization accuracy by analyzing the relationship between the communication distance and ranging error.Then,the localization area was divided into several honeycomb sub-regions with the optimal length according to the situation of the overall environment.And these honeycomb sub-regions developed their environmental parameters by the least squares fitting method.Last,RSSI values were filtrated by Gaussian distribution model and weighted arithmetic to ensure the reliability.The simulation results showed the improved algorithm had better efficiency and positioning accuracy,compared with the traditional weighted triangular centroid positioning algorithm.
2017, 32(1)
:97-102.
doi: 10.3969/j.issn.2096-1553.2017.1.014
Abstract:
Since the traditional edge detection operators in a plant lesion detection process using non-maxima suppression method very easily led to spurious noise edges,poor anti-noise performance and weak adaptive capacity,a non-maxima suppression based on improved linear interpolation method was proposed.This method at first used improved morphological filtering method to replace Gaussian filtering.Then by introducing interpolation factor and related field coefficient,it used the target pixel four points and related fields around the gradient direction coefficient linear interpolation, thus replacing the traditional method to compare with the field value directly along the gradient direction.The results showed that improved method had good improvements in terms of suppressing false edge point appears and adaptability in the lesion portion division, and had very good validity, accuracy and robustness.
Since the traditional edge detection operators in a plant lesion detection process using non-maxima suppression method very easily led to spurious noise edges,poor anti-noise performance and weak adaptive capacity,a non-maxima suppression based on improved linear interpolation method was proposed.This method at first used improved morphological filtering method to replace Gaussian filtering.Then by introducing interpolation factor and related field coefficient,it used the target pixel four points and related fields around the gradient direction coefficient linear interpolation, thus replacing the traditional method to compare with the field value directly along the gradient direction.The results showed that improved method had good improvements in terms of suppressing false edge point appears and adaptability in the lesion portion division, and had very good validity, accuracy and robustness.
2017, 32(1)
:103-108.
doi: 10.3969/j.issn.2096-1553.2017.1.015
Abstract:
A rapid and nondestructive method to discriminate the varieties of accumulation teas was proposed.The color images of the detecting teas with natural grain accumulation captured by CCD were preprocessed with filter, and analyzed by gray level co-occurrence matrix to gain texture feature of tea.Three characteristic parameters from principal component analysis were the input parameters of BP neural network model to set up pattern recognition model.The experimental results showed that the predictive accuracy was 93.80% for unknown 32 forecast samples. the system and method can meet the requirement of tea production and trade circulation.The method provided a kind of recognition technology to realize the tea varieties rapid nondestructive identification and improve the recognition accuracy in the process of production, processing and trade of the tea.
A rapid and nondestructive method to discriminate the varieties of accumulation teas was proposed.The color images of the detecting teas with natural grain accumulation captured by CCD were preprocessed with filter, and analyzed by gray level co-occurrence matrix to gain texture feature of tea.Three characteristic parameters from principal component analysis were the input parameters of BP neural network model to set up pattern recognition model.The experimental results showed that the predictive accuracy was 93.80% for unknown 32 forecast samples. the system and method can meet the requirement of tea production and trade circulation.The method provided a kind of recognition technology to realize the tea varieties rapid nondestructive identification and improve the recognition accuracy in the process of production, processing and trade of the tea.
Journal Information
Founded in 1986， bimonthly
Administered by：The Education Department Henan Province
Sponsored by：Zhengzhou University of Light Industry
Editor-in-chief：Wei Shizhong
Executive Editor-in-Chief：Zou Lin
Subeditor：Qu Shuanghong
Edited & published by：Editorial Department of Journal of Light Industry
CN 41-1437/TS
ISSN 2096-1553
Address：136 Science Avenue, Zhengzhou City, Henan Province, China
Postal Code：450001
Tel：(086)0371-86608635
(086)0371-86608633
