2014 Vol. 29, No. 6
Display Method: |
2014, 29(6)
:1-4.
doi: 10.3969/j.issn.2095-476X.2014.06.001
Abstract:
Using He'nan roast flavor style flue-cured tobacco leaf as research object,potassium content from different parts of tobacco leaf after cutting into 10 sections was studied.The results showed that the potassium content of 30 samples ranged from 1.14% to 2.39%, which held an average value of 1.52%. In terms of the same tobacco leaf, the potassium content of each section held significant differences, which showed an increasing trend from the tips of the leaf to the bases. The contents of potassium between different parts differed from each other obviously and showed a trend like lower > middle > upper. The distribution of potassium content in same section of different parts tended to be:tip sections < middle sections < base sections. By the method of cluster analysis and group-average cluster analysis, roast flavor style flue-cured tobacco leaves were cut into three sections consecutively, which based on the differences of potassium content in different parts of tobacco leaves.
Using He'nan roast flavor style flue-cured tobacco leaf as research object,potassium content from different parts of tobacco leaf after cutting into 10 sections was studied.The results showed that the potassium content of 30 samples ranged from 1.14% to 2.39%, which held an average value of 1.52%. In terms of the same tobacco leaf, the potassium content of each section held significant differences, which showed an increasing trend from the tips of the leaf to the bases. The contents of potassium between different parts differed from each other obviously and showed a trend like lower > middle > upper. The distribution of potassium content in same section of different parts tended to be:tip sections < middle sections < base sections. By the method of cluster analysis and group-average cluster analysis, roast flavor style flue-cured tobacco leaves were cut into three sections consecutively, which based on the differences of potassium content in different parts of tobacco leaves.
2014, 29(6)
:5-8,12.
doi: 10.3969/j.issn.2095-476X.2014.06.002
Abstract:
After the laccase crude enzyme which was obtained by fermenting Coriolus versicolor had been concentrated and hyperfiltrated,grading salting precipitation and DEAE-Sepharose-F.F.column chromatography had been taken to separate and purify the laccase fermented liquid with ammonium sulfate as the salting-out agent.SDS-PAGE electrophoresis results showed that pure laccase could be obtained,the molecular weight was about 64.4 kD,enzyme was purified for 22.80 times by the purification process,the enzyme activity recovery rate was 36.32%.These proved that the laccase which was produced by Coriolus versicolor could be well purified.Using the enzyme solution in the experiment stem lignin degradation,the results showed that the intrinsic quality of the processed tobacco stems had been improved to some extent,miscellaneous gases and irritating significantly reduced,wood gas also significantly reduced,aroma and aftertaste slightly improved.
After the laccase crude enzyme which was obtained by fermenting Coriolus versicolor had been concentrated and hyperfiltrated,grading salting precipitation and DEAE-Sepharose-F.F.column chromatography had been taken to separate and purify the laccase fermented liquid with ammonium sulfate as the salting-out agent.SDS-PAGE electrophoresis results showed that pure laccase could be obtained,the molecular weight was about 64.4 kD,enzyme was purified for 22.80 times by the purification process,the enzyme activity recovery rate was 36.32%.These proved that the laccase which was produced by Coriolus versicolor could be well purified.Using the enzyme solution in the experiment stem lignin degradation,the results showed that the intrinsic quality of the processed tobacco stems had been improved to some extent,miscellaneous gases and irritating significantly reduced,wood gas also significantly reduced,aroma and aftertaste slightly improved.
2014, 29(6)
:9-12.
doi: 10.3969/j.issn.2095-476X.2014.06.003
Abstract:
In order to raise efficiency and avoid equipment damage,the same capillary column of the benzene series in water-based adhesive was used to establish the method of determinating phthalates content in water-based adhesive.The results showed that the method had good reproducibility and accuracy,the variation coefficient was less than 6% and the average recovery ratio was 88.06%~104.26%.The range of detection limit and quantification limit were 0.002~0.027 μg/mL and 0.007~0.089 μg/mL respectively.There was not significant difference between the method and industry standard method,and the method could be used to determine the phthalates content in water-based adhesive.
In order to raise efficiency and avoid equipment damage,the same capillary column of the benzene series in water-based adhesive was used to establish the method of determinating phthalates content in water-based adhesive.The results showed that the method had good reproducibility and accuracy,the variation coefficient was less than 6% and the average recovery ratio was 88.06%~104.26%.The range of detection limit and quantification limit were 0.002~0.027 μg/mL and 0.007~0.089 μg/mL respectively.There was not significant difference between the method and industry standard method,and the method could be used to determine the phthalates content in water-based adhesive.
2014, 29(6)
:13-16.
doi: 10.3969/j.issn.2095-476X.2014.06.004
Abstract:
In order to study the influence of cut tobacco drying parameters on moisture content in cigarette smoke,a test and evaluation was carried out using KLD and HDT drier.The results showed that:1)There was the extremely significant positive correlation between the dry,astringent taste and moisture content in cigarette smoke,there was the significant positive correlation between stimulus and moisture content in cigarette smoke. 2)The moisture content in cigarette smoke of KLD samples was higher than HDT samples; during the process parameter of KLD drier,the moisture content in cigarette smoke increased with the increase of air temperature,changed along with the steam flow and the air velocity obviously but not with moisture content of tobacco; during the process parameter of HDT drier,the moisture content in cigarette smoke increased with the increase of the moisture content of tobacco and the moisture exhaust pressure,changed along with the steam flow and the fan speed vary obviously.
In order to study the influence of cut tobacco drying parameters on moisture content in cigarette smoke,a test and evaluation was carried out using KLD and HDT drier.The results showed that:1)There was the extremely significant positive correlation between the dry,astringent taste and moisture content in cigarette smoke,there was the significant positive correlation between stimulus and moisture content in cigarette smoke. 2)The moisture content in cigarette smoke of KLD samples was higher than HDT samples; during the process parameter of KLD drier,the moisture content in cigarette smoke increased with the increase of air temperature,changed along with the steam flow and the air velocity obviously but not with moisture content of tobacco; during the process parameter of HDT drier,the moisture content in cigarette smoke increased with the increase of the moisture content of tobacco and the moisture exhaust pressure,changed along with the steam flow and the fan speed vary obviously.
2014, 29(6)
:17-21.
doi: 10.3969/j.issn.2095-476X.2014.06.005
Abstract:
The research progress of the extraction condition choice and optimization of paper-making reconstituted tobacco,and coating liquid treatment process were summarized. The coating liquid constituents were regulated and restructured by using microorganisms,the Maillard reaction,membrane technology,herbal and other technologies,so as to develop a new low-harm reconstituted tobacco will be the future trends.
The research progress of the extraction condition choice and optimization of paper-making reconstituted tobacco,and coating liquid treatment process were summarized. The coating liquid constituents were regulated and restructured by using microorganisms,the Maillard reaction,membrane technology,herbal and other technologies,so as to develop a new low-harm reconstituted tobacco will be the future trends.
2014, 29(6)
:22-24,32.
doi: 10.3969/j.issn.2095-476X.2014.06.006
Abstract:
The comprehensive comparative study of expansion rate of B2F tobacco, the structure and the quality of expanded tobacco from three areas including Xiang county in He'nan, Zunyi in Guizhou and Chuxiong in Yunnan was carried out.The results showed that steam expansion technique was particularly suitable for the treatment of upper leaves, improving the filling ability of upper leaves and getting rid of odor and irritation, so that the excellent quality characteristics of upper leaves fully reflected.The process of steam expansion technique, it could increase the mature aroma of tobacco smoke,reduce local hybrid gas and lift flue gas concentrations.It had good compatibility with conventional treatment process of tobacco.The results showed that the tobacco from Chuxiong area was more suitable for steam expansion tobacco technology.
The comprehensive comparative study of expansion rate of B2F tobacco, the structure and the quality of expanded tobacco from three areas including Xiang county in He'nan, Zunyi in Guizhou and Chuxiong in Yunnan was carried out.The results showed that steam expansion technique was particularly suitable for the treatment of upper leaves, improving the filling ability of upper leaves and getting rid of odor and irritation, so that the excellent quality characteristics of upper leaves fully reflected.The process of steam expansion technique, it could increase the mature aroma of tobacco smoke,reduce local hybrid gas and lift flue gas concentrations.It had good compatibility with conventional treatment process of tobacco.The results showed that the tobacco from Chuxiong area was more suitable for steam expansion tobacco technology.
2014, 29(6)
:25-27.
doi: 10.3969/j.issn.2095-476X.2014.06.007
Abstract:
On the different condition of colloid processing times, concentration and temperature,the effect of colloid mill processing on the viscosity properties of fresh jujube pulp was studied. Results showed that grain size of pulp decreased with the increase of colloid processing times,viscosity of pulp had closely related with grain size.The influence of concentration on viscosity properties of fresh jujube pulp could be expressed as η=K(C)A and η=Kexp(AC). The influence of temperature on viscosity properties of fresh jujube pulp could be expressed as η=K0exp(Ea/RT).All these indicated that colloid mill processing condition had important role on viscosity properties of fresh jujube pulp.
On the different condition of colloid processing times, concentration and temperature,the effect of colloid mill processing on the viscosity properties of fresh jujube pulp was studied. Results showed that grain size of pulp decreased with the increase of colloid processing times,viscosity of pulp had closely related with grain size.The influence of concentration on viscosity properties of fresh jujube pulp could be expressed as η=K(C)A and η=Kexp(AC). The influence of temperature on viscosity properties of fresh jujube pulp could be expressed as η=K0exp(Ea/RT).All these indicated that colloid mill processing condition had important role on viscosity properties of fresh jujube pulp.
2014, 29(6)
:28-32.
doi: 10.3969/j.issn.2095-476X.2014.06.008
Abstract:
The 8-week-old SPF class C57BL/6 male mice were used as experimental object,the compound diphenoxylate was adopted to establish the constipation model.At the same time,three groups were established maren pills positive control group, blank control group and rice isomalto-oligosaccharide low, medium,and high dose groups. The body weight change of experimental mice gavage before and after, the mice first defecation time, 8 h defecation number, 8 h defecation quality, 8 h defecation moisture content and small intestine propulsion rate were analyzed through single factor experiment. The results showed that there were significant differences between the constipation model group and positive control group, blank control group.Constipation model group was established successfully; rice isomalto-oligosaccharide could shorten the mice first defecation time, improve 8 h defecation quality, 8 h defecation moisture content and small intestine propulsion rate, and the aperient bowel effect of medium dose group was better.
The 8-week-old SPF class C57BL/6 male mice were used as experimental object,the compound diphenoxylate was adopted to establish the constipation model.At the same time,three groups were established maren pills positive control group, blank control group and rice isomalto-oligosaccharide low, medium,and high dose groups. The body weight change of experimental mice gavage before and after, the mice first defecation time, 8 h defecation number, 8 h defecation quality, 8 h defecation moisture content and small intestine propulsion rate were analyzed through single factor experiment. The results showed that there were significant differences between the constipation model group and positive control group, blank control group.Constipation model group was established successfully; rice isomalto-oligosaccharide could shorten the mice first defecation time, improve 8 h defecation quality, 8 h defecation moisture content and small intestine propulsion rate, and the aperient bowel effect of medium dose group was better.
2014, 29(6)
:33-38.
doi: 10.3969/j.issn.2095-476X.2014.06.009
Abstract:
Spinacia oleracea L was used as materials to study the effect of salicylic acid(SA) with different concentrations on stomatal aperture of spinach leaf epidermis in the condition of salt stress.Epidermis stomatal morphology,stomatal aperture and soluble sugar content were characterized and tested by scanning electron microscope(SEM),ordinary optical microscope and anthrone method.Results presented that with the increase of SA concentration, leaf epidermis stomatal morphology by slender line gradually became oval; the leaf epidermis stomatal aperture gradually increased, when the SA concentration was 200 mg/L, the stomatal aperture achieved maximum; leaf soluble sugar content presented the trend of increase firstly,then lower, when SA concentration was 150 mg/L, soluble sugar content achieved maximum, and the content increased by 28.9% than that under salt stress.The addition of SA could adjust the stomatal morphology and stomatal aperture of spinach leaf epidermis,and enhance its photosynthetic efficiency and osmotic regulation effect,thus improve the salt resistance of spinach.
Spinacia oleracea L was used as materials to study the effect of salicylic acid(SA) with different concentrations on stomatal aperture of spinach leaf epidermis in the condition of salt stress.Epidermis stomatal morphology,stomatal aperture and soluble sugar content were characterized and tested by scanning electron microscope(SEM),ordinary optical microscope and anthrone method.Results presented that with the increase of SA concentration, leaf epidermis stomatal morphology by slender line gradually became oval; the leaf epidermis stomatal aperture gradually increased, when the SA concentration was 200 mg/L, the stomatal aperture achieved maximum; leaf soluble sugar content presented the trend of increase firstly,then lower, when SA concentration was 150 mg/L, soluble sugar content achieved maximum, and the content increased by 28.9% than that under salt stress.The addition of SA could adjust the stomatal morphology and stomatal aperture of spinach leaf epidermis,and enhance its photosynthetic efficiency and osmotic regulation effect,thus improve the salt resistance of spinach.
2014, 29(6)
:39-42.
doi: 10.3969/j.issn.2095-476X.2014.06.010
Abstract:
The ionic liquid/chitosan composite membrane was prepared by solution casting.Structure,morphology and mechanical properties of the composites were analyzed by FT-IR,AFM and DMA.The results showed that there existed significant physical interactions such as hydrogen bond between the ionic liquid and chitosan.There was a great impact on the crystal morphology of the chitosan with the addition of ionic liquids.The pure chitosan looked like slender needle with good distribution and its surface was flat.Whereas the spherulites particles were observed and the particle size increased firstly,then decreased.When adding content was 20%,the particle size was the largest,and corresponding surface roughness was 267.74 nm;the storage modulus of composite membrane achieved maximum,about 1.5 times than that of the pure chitosan film.But with the addition of ionic liquids,there was no obvious change of chitosan membrane glass transition temperature.
The ionic liquid/chitosan composite membrane was prepared by solution casting.Structure,morphology and mechanical properties of the composites were analyzed by FT-IR,AFM and DMA.The results showed that there existed significant physical interactions such as hydrogen bond between the ionic liquid and chitosan.There was a great impact on the crystal morphology of the chitosan with the addition of ionic liquids.The pure chitosan looked like slender needle with good distribution and its surface was flat.Whereas the spherulites particles were observed and the particle size increased firstly,then decreased.When adding content was 20%,the particle size was the largest,and corresponding surface roughness was 267.74 nm;the storage modulus of composite membrane achieved maximum,about 1.5 times than that of the pure chitosan film.But with the addition of ionic liquids,there was no obvious change of chitosan membrane glass transition temperature.
2014, 29(6)
:43-47.
doi: 10.3969/j.issn.2095-476X.2014.06.011
Abstract:
Poly (urethane-methacrylate) macromonomers were synthesized based on isophorone diisocyanate (IPDI), poly (tetrahydrofuran) 1000 (PTMEG-1000), poly (ethylene glycol) 400 (PEG-400) and β-hydroxyethyl methacrylate (HEMA). Then high transparent poly (urethane-methacrylate) materials with weathering resistance were prepared by the polymerization of the macromonomers using 2,2-azo-bis-iso-butyro-nitrile (AIBN) as initiator. The obtained PU materials were characterized by FT-IR and XRD.The weathering resistance of PU materials was characterized under the condition of freezing and UV-irradiation. The results showed that the thermal stability and optical performance of PU materials increased with increasing PTMEG-1000 content, and comprehensive performance in freezing and UV-irradiation conditions were almost the same results as at room temperature, which indicated the materials owned good weatherability. PU-3 exhibited outstanding performance. The tensile strength and the transmittance of PU-3 were 13.1 MPa and 92.1% at room temperature, respectively. Its tensile strength and transmittance were 15.7 MPa and 84.7% at -26℃, respectively. And its tensile strength and transmittance were 11.5 MPa and 74.3% after UV-irradiation, respectively.
Poly (urethane-methacrylate) macromonomers were synthesized based on isophorone diisocyanate (IPDI), poly (tetrahydrofuran) 1000 (PTMEG-1000), poly (ethylene glycol) 400 (PEG-400) and β-hydroxyethyl methacrylate (HEMA). Then high transparent poly (urethane-methacrylate) materials with weathering resistance were prepared by the polymerization of the macromonomers using 2,2-azo-bis-iso-butyro-nitrile (AIBN) as initiator. The obtained PU materials were characterized by FT-IR and XRD.The weathering resistance of PU materials was characterized under the condition of freezing and UV-irradiation. The results showed that the thermal stability and optical performance of PU materials increased with increasing PTMEG-1000 content, and comprehensive performance in freezing and UV-irradiation conditions were almost the same results as at room temperature, which indicated the materials owned good weatherability. PU-3 exhibited outstanding performance. The tensile strength and the transmittance of PU-3 were 13.1 MPa and 92.1% at room temperature, respectively. Its tensile strength and transmittance were 15.7 MPa and 84.7% at -26℃, respectively. And its tensile strength and transmittance were 11.5 MPa and 74.3% after UV-irradiation, respectively.
2014, 29(6)
:48-51.
doi: 10.3969/j.issn.2095-476X.2014.06.012
Abstract:
In order to solve technical problems about partial conduction on the surface of equipment optical lens,a series of process method which adapted to the partial surface of equipment optical lens was screened out,the paint category of shielding film coating process was determined,the thickness of shielding film was 120 μm,the curing temperature was 93℃,the curing time was 35 min. The shielding film could protect optical lens based on effective isolation between conductive surface and sulfuric acid anodic oxidation solution through shielding film.It could realize the purpose of protecting the conductive surface of optical lens,and satisfy the request of the particular use of partial conduction and partial blackening after sulfuric acid anodic oxidation on the surface of equipment optical lens.
In order to solve technical problems about partial conduction on the surface of equipment optical lens,a series of process method which adapted to the partial surface of equipment optical lens was screened out,the paint category of shielding film coating process was determined,the thickness of shielding film was 120 μm,the curing temperature was 93℃,the curing time was 35 min. The shielding film could protect optical lens based on effective isolation between conductive surface and sulfuric acid anodic oxidation solution through shielding film.It could realize the purpose of protecting the conductive surface of optical lens,and satisfy the request of the particular use of partial conduction and partial blackening after sulfuric acid anodic oxidation on the surface of equipment optical lens.
2014, 29(6)
:52-60.
doi: 10.3969/j.issn.2095-476X.2014.06.013
Abstract:
The application of computer vision in autonomous vehicles, robot localization, vehicle detection,driving assistance, intelligent traffic monitoring, human detection, face recognition, and so on was summarized. It pointed out that improving detection and recognition rate of visual sensor under bad weather conditions and solving the problems such as large amount of data processing produced by visual sensor,the need for a large amount of computing resources of computer vision method are the focus in the future research.
The application of computer vision in autonomous vehicles, robot localization, vehicle detection,driving assistance, intelligent traffic monitoring, human detection, face recognition, and so on was summarized. It pointed out that improving detection and recognition rate of visual sensor under bad weather conditions and solving the problems such as large amount of data processing produced by visual sensor,the need for a large amount of computing resources of computer vision method are the focus in the future research.
2014, 29(6)
:61-66.
doi: 10.3969/j.issn.2095-476X.2014.06.014
Abstract:
In order to improve the deficiencies of the existing scrambling algorithm effectively,a new image encryption algorithm based on dual scrambling about pixel position scrambling and RGB color space intensity value was proposed.Firstly,the rows and columns of 2D matrix would be mapped into 1D vector by making use of new proposed scrambling method based on pixel position.Then a set of pseudo sequence was generated by using the Logistic mapping,and it was ranked from small to large.The position that corresponding to each element was recorded by group sequence,which was called key stream.Finally,the corresponding pixel position of 1D vector was scrambled by index value which was formed by key stream.The encrypted image was obtained by 1D vector rearranged into a new 2D matrix.The experimental results showed that the proposed method had a large key space,and the scrambled image had a histogram distribution of white noise.The correlation of image pixel values was smaller.It greatly improved the ability to resist the illegal attack and increased the safety of encrypted image.
In order to improve the deficiencies of the existing scrambling algorithm effectively,a new image encryption algorithm based on dual scrambling about pixel position scrambling and RGB color space intensity value was proposed.Firstly,the rows and columns of 2D matrix would be mapped into 1D vector by making use of new proposed scrambling method based on pixel position.Then a set of pseudo sequence was generated by using the Logistic mapping,and it was ranked from small to large.The position that corresponding to each element was recorded by group sequence,which was called key stream.Finally,the corresponding pixel position of 1D vector was scrambled by index value which was formed by key stream.The encrypted image was obtained by 1D vector rearranged into a new 2D matrix.The experimental results showed that the proposed method had a large key space,and the scrambled image had a histogram distribution of white noise.The correlation of image pixel values was smaller.It greatly improved the ability to resist the illegal attack and increased the safety of encrypted image.
2014, 29(6)
:67-72.
doi: 10.3969/j.issn.2095-476X.2014.06.015
Abstract:
Aiming at the problem of high complexity of image encryption algorithm at present, a new wavelet domain block encryption method was proposed.First, the algorithm decomposed the original image into multiple different resolution images using DWT (discrete wavelet transform), and the low-frequency coefficients of the image were scrambled by the hyperchaotic system.After IDWT (inverse discrete wavelet transform), bitwise XOR was performed on the reconstructured image with a sequence generated using hyper-chaostic system.The experimental results verified that the grey information of the original image was hidden, this encrypting method had a large space of keys and high safety performance; and the scrambled image had good performance of the resisting statistic attack and differential cryptanalysis.
Aiming at the problem of high complexity of image encryption algorithm at present, a new wavelet domain block encryption method was proposed.First, the algorithm decomposed the original image into multiple different resolution images using DWT (discrete wavelet transform), and the low-frequency coefficients of the image were scrambled by the hyperchaotic system.After IDWT (inverse discrete wavelet transform), bitwise XOR was performed on the reconstructured image with a sequence generated using hyper-chaostic system.The experimental results verified that the grey information of the original image was hidden, this encrypting method had a large space of keys and high safety performance; and the scrambled image had good performance of the resisting statistic attack and differential cryptanalysis.
2014, 29(6)
:73-77.
doi: 10.3969/j.issn.2095-476X.2014.06.016
Abstract:
Aiming at the security problem of chaos theory in cryptography application,a chaotic block encryption algorithm was designed based on the theory of discrete coupled map lattice and asymptotic deterministic randomness.The algorithm used aymptotic deterministic randomness key to diffuse the plaintext,and through the iteration of the discrete coupled map lattice the plaintext was encrypted.Then the validity,sensitivity and resistance of algorithm were tested and analyzed.The results showed that the security of chaotic encryption algorithm was higher.
Aiming at the security problem of chaos theory in cryptography application,a chaotic block encryption algorithm was designed based on the theory of discrete coupled map lattice and asymptotic deterministic randomness.The algorithm used aymptotic deterministic randomness key to diffuse the plaintext,and through the iteration of the discrete coupled map lattice the plaintext was encrypted.Then the validity,sensitivity and resistance of algorithm were tested and analyzed.The results showed that the security of chaotic encryption algorithm was higher.
2014, 29(6)
:78-80.
doi: 10.3969/j.issn.2095-476X.2014.06.017
Abstract:
In order to improve the efficiency of 3D face recognition,a 3D face recognition method based on Fisherface and LBP (local binary pattern) was put forward.The face depth data was firstly extracted,then the feature of 3D face was extracted by combining the depth data with LBP,finally the Fisherface method was used for identification.The experimental results showed that comparing with single recognition method,the efficiency of 3D face recognition increased using Fisherface method based on LBP_depth data.
In order to improve the efficiency of 3D face recognition,a 3D face recognition method based on Fisherface and LBP (local binary pattern) was put forward.The face depth data was firstly extracted,then the feature of 3D face was extracted by combining the depth data with LBP,finally the Fisherface method was used for identification.The experimental results showed that comparing with single recognition method,the efficiency of 3D face recognition increased using Fisherface method based on LBP_depth data.
2014, 29(6)
:81-85.
doi: 10.3969/j.issn.2095-476X.2014.06.018
Abstract:
Aiming at the problem of the long cycle,complex manipulation,and low accuracy of the traditional automobile exhaust detection method,3G remote vehicle exhaust detection system based on IOV was proposed.In order to obtain a signal value corresponding to the electrode-gas concentration,electrochemical sensors were introduced for a chemical reaction with the exhaust gas; CAN bus was used for the real-time acquisition of the electrical signal of the sensor node to calculate the corresponding gas concentration through the control software; the 3G remote communication system was designed to detect the vehicle exhaust concentration within certain area,which could provide effective reference data for prevention and control of air pollution.The result showed that the system improved the inteligent,real-time and accuracy of the traditional monitoring,and solved the development bottleneck of traditional exhaust gas monitoring system.
Aiming at the problem of the long cycle,complex manipulation,and low accuracy of the traditional automobile exhaust detection method,3G remote vehicle exhaust detection system based on IOV was proposed.In order to obtain a signal value corresponding to the electrode-gas concentration,electrochemical sensors were introduced for a chemical reaction with the exhaust gas; CAN bus was used for the real-time acquisition of the electrical signal of the sensor node to calculate the corresponding gas concentration through the control software; the 3G remote communication system was designed to detect the vehicle exhaust concentration within certain area,which could provide effective reference data for prevention and control of air pollution.The result showed that the system improved the inteligent,real-time and accuracy of the traditional monitoring,and solved the development bottleneck of traditional exhaust gas monitoring system.
2014, 29(6)
:86-91.
doi: 10.3969/j.issn.2095-476X.2014.06.019
Abstract:
A controllable 4-arm DNA tile self-assembly based on DNA sub-tile and DNA strand displacement (DSD) was proposed based on original sub-tile.The impacts on time responses of this design was studied by designating new reaction rates to toeholds.Visual DSD results showed that increasing the population ratio-active strands to arm strands and assigning higher reaction rates of toeholds could accelerate DNA tile self-assembly.These simulation results could convince the possibility of implementing controllable DNA tile self-assembly at room temperature in laboratory.
A controllable 4-arm DNA tile self-assembly based on DNA sub-tile and DNA strand displacement (DSD) was proposed based on original sub-tile.The impacts on time responses of this design was studied by designating new reaction rates to toeholds.Visual DSD results showed that increasing the population ratio-active strands to arm strands and assigning higher reaction rates of toeholds could accelerate DNA tile self-assembly.These simulation results could convince the possibility of implementing controllable DNA tile self-assembly at room temperature in laboratory.
2014, 29(6)
:92-94,102.
doi: 10.3969/j.issn.2095-476X.2014.06.020
Abstract:
In order to improve identification exactness of chaotic system with noise,a new identification method based on wavelet neural network was presented,which was integrated with dynamic threshold and stochastic gradient.The method made dynamic threshold to affect wavelet coefficients,the train process was closely integrated with neural network and the threshold was dynamically and inversely modified based on error function and stochastic gradient,so the error was increasingly shrinking and approaching to the ideal output.The result showed that the method could reduce the noise of chaotic system and finally acquire better exactness.
In order to improve identification exactness of chaotic system with noise,a new identification method based on wavelet neural network was presented,which was integrated with dynamic threshold and stochastic gradient.The method made dynamic threshold to affect wavelet coefficients,the train process was closely integrated with neural network and the threshold was dynamically and inversely modified based on error function and stochastic gradient,so the error was increasingly shrinking and approaching to the ideal output.The result showed that the method could reduce the noise of chaotic system and finally acquire better exactness.
2014, 29(6)
:95-98.
doi: 10.3969/j.issn.2095-476X.2014.06.021
Abstract:
In order to solve the problems such as the low degree of automation of concrete curing room temperature control,the difficulty for the temperature control to meet the requirements of national standard, the parameter self-tuning fuzzy PID control algorithm was put forward.The algorithm through the real-time correction PID parameters to ensure the system accuracy and stability.The Matlab simulation results showed that the parameter self-tuning fuzzy PID control system has better stability and robustness than the traditional PID.
In order to solve the problems such as the low degree of automation of concrete curing room temperature control,the difficulty for the temperature control to meet the requirements of national standard, the parameter self-tuning fuzzy PID control algorithm was put forward.The algorithm through the real-time correction PID parameters to ensure the system accuracy and stability.The Matlab simulation results showed that the parameter self-tuning fuzzy PID control system has better stability and robustness than the traditional PID.
2014, 29(6)
:99-102.
doi: 10.3969/j.issn.2095-476X.2014.06.022
Abstract:
Considering the classical risk model with optimal dividend payments under force of interest and transaction cost, with maximizing the discounted dividend payments minus the penalized discounted capital injections as the object the corresponding Hamilton-Jacobi-Bellman equation was built by stochastic control theory.A method to determine numerically the solution to the integro-differential equation was derived.It showed that the optimal strategy was threshold strategy.
Considering the classical risk model with optimal dividend payments under force of interest and transaction cost, with maximizing the discounted dividend payments minus the penalized discounted capital injections as the object the corresponding Hamilton-Jacobi-Bellman equation was built by stochastic control theory.A method to determine numerically the solution to the integro-differential equation was derived.It showed that the optimal strategy was threshold strategy.
2014, 29(6)
:103-108.
doi: 10.3969/j.issn.2095-476X.2014.06.023
Abstract:
Assuming that the stock company pays dividend continuously and the dividend was related with the price of the stock in the time that the stock company pays dividend, and the pricing process was jump-diffusion process, the jump process was Poisson process,the stock pricing model was established.And it gave the European call power option and the European put power option pricing model using insurance actuary pricing.The result of Merton on European option pricing was generalized.It was superior to no-dividend payment and it was more closed to the actual market situation.
Assuming that the stock company pays dividend continuously and the dividend was related with the price of the stock in the time that the stock company pays dividend, and the pricing process was jump-diffusion process, the jump process was Poisson process,the stock pricing model was established.And it gave the European call power option and the European put power option pricing model using insurance actuary pricing.The result of Merton on European option pricing was generalized.It was superior to no-dividend payment and it was more closed to the actual market situation.
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
