2013 Vol. 28, No. 4
Display Method: |
2013, 28(4)
:1-5.
doi: 10.3969/j.issn.2095-476X.2013.04.001
Abstract:
Amino group-functionalized mesoporous ethane-silicas were synthesized by co-condensation of 1,2-bis(trimethoxysily)ethane (BTME) and 3-aminopropyltriethoxysilane(AMPTS).TEM,XRD,nitrogen adsorption and desorption,FT-IR,elemental analysis and 13C NMR were used to characterize the obtained materials.Ibuprofen was used as a model drug to test the drug adsorption and release properties of mesoporous materials.The results showed that amino group-functionalized mesoporous ethane-silicas presented stronger adsorption capacity,which could increase up to 0.78 g/g from 0.35 g/g.Compared with EA-0,the materials EA-20 had a better sustained release effect during the release process.
Amino group-functionalized mesoporous ethane-silicas were synthesized by co-condensation of 1,2-bis(trimethoxysily)ethane (BTME) and 3-aminopropyltriethoxysilane(AMPTS).TEM,XRD,nitrogen adsorption and desorption,FT-IR,elemental analysis and 13C NMR were used to characterize the obtained materials.Ibuprofen was used as a model drug to test the drug adsorption and release properties of mesoporous materials.The results showed that amino group-functionalized mesoporous ethane-silicas presented stronger adsorption capacity,which could increase up to 0.78 g/g from 0.35 g/g.Compared with EA-0,the materials EA-20 had a better sustained release effect during the release process.
2013, 28(4)
:6-10,58.
doi: 10.3969/j.issn.2095-476X.2013.04.002
Abstract:
The synthesis methods of dicationic ionic liquids and the relationship between their structures and physicochemical properties including density,melting point/glass transition temperature,thermostability,surface tension and viscosity were reviewed.Nowadays,the dicationic ionic liquids research are focused on synthesis of new species and physicochemical properties.The investigation on dicationic ionic liquids is quite self-evident in the scarcity of the thermodynamic properties,the quantitative calculation and molecular simulation.In the future,the attention for dicationic ionic liquids will be determining the structure-activity relationship and the corresponding model building.
The synthesis methods of dicationic ionic liquids and the relationship between their structures and physicochemical properties including density,melting point/glass transition temperature,thermostability,surface tension and viscosity were reviewed.Nowadays,the dicationic ionic liquids research are focused on synthesis of new species and physicochemical properties.The investigation on dicationic ionic liquids is quite self-evident in the scarcity of the thermodynamic properties,the quantitative calculation and molecular simulation.In the future,the attention for dicationic ionic liquids will be determining the structure-activity relationship and the corresponding model building.
2013, 28(4)
:11-14.
doi: 10.3969/j.issn.2095-476X.2013.04.003
Abstract:
According to natural moisturizing factor,water and lipid viz.,a skin moisturizing cream was developed by imitating the skin's natural moisturizing system itself.And the obtained skin moisturizing cream was used to test its moisturizing effect by measuring skin hydration degree when rubbed on skin for 8 h.The results showed that the obtained product had good sustained moisturizing ability,and its overall satisfaction rate was above 90%.
According to natural moisturizing factor,water and lipid viz.,a skin moisturizing cream was developed by imitating the skin's natural moisturizing system itself.And the obtained skin moisturizing cream was used to test its moisturizing effect by measuring skin hydration degree when rubbed on skin for 8 h.The results showed that the obtained product had good sustained moisturizing ability,and its overall satisfaction rate was above 90%.
2013, 28(4)
:15-19.
doi: 10.3969/j.issn.2095-476X.2013.04.004
Abstract:
The ultrasonic-assisted extraction technology of sucrose esters (SE) from tobacco was studied.The qualitative and quantitative analysis was performed by gas chromatography-mass spectrometry (GC-MS) method,and the effect of various factors including extraction solvent, temperature,time and solid liquid ratio on the total extract yield of SE was investigated by response surface methodology (RSM).The results showed that the optimal extraction conditions were as follows:the extraction solvent acetonitrile,the solid liquid ratio 1:29,the temperature 43℃ and the extraction time 16 min.Under the optimized conditions,the total extract yield of SE was 5.039 (actual) or 5.067 (theoretical),the average recovery was 99.87%,7.74% more than that obtained under the optimized conditions of single facter tests.The determination results of 10 kinds of tobacco leaf showed that the kinds and content of SE in tobacco leaves were different with different origin,variety and level.
The ultrasonic-assisted extraction technology of sucrose esters (SE) from tobacco was studied.The qualitative and quantitative analysis was performed by gas chromatography-mass spectrometry (GC-MS) method,and the effect of various factors including extraction solvent, temperature,time and solid liquid ratio on the total extract yield of SE was investigated by response surface methodology (RSM).The results showed that the optimal extraction conditions were as follows:the extraction solvent acetonitrile,the solid liquid ratio 1:29,the temperature 43℃ and the extraction time 16 min.Under the optimized conditions,the total extract yield of SE was 5.039 (actual) or 5.067 (theoretical),the average recovery was 99.87%,7.74% more than that obtained under the optimized conditions of single facter tests.The determination results of 10 kinds of tobacco leaf showed that the kinds and content of SE in tobacco leaves were different with different origin,variety and level.
2013, 28(4)
:20-23.
doi: 10.3969/j.issn.2095-476X.2013.04.005
Abstract:
The aromatic components of honeysuckle was prepared by using water extraction method and macroporous resin column chromatography,and the optimal conditions of water extraction process were obtained by single factor experiment:ratio of solid to liquid 1:9,extraction temperature 90℃,extraction 2 times.There were 38 components were identified by GC/MS,the main components were linalool,methyl hexadecanoate,hexadecanoic acid ethyl ester,octadecanoic acid ethyl ester,8,11-octadecadienoic acid methyl ester,linoleic acid ethyl ester,methyl linolenate,linolenic acid ethyl ester,hexadecanoic acid,oleic acid,(Z,Z)-9,12-octadecadienoic acid,(Z,Z,Z)-9,12,15-octadecatrien-1-ol,etc.The 0.05% aromatic components was added into cigerettes as a flavor.The results showed that it could enrich the smokey,enhance the notes of fresh aroma,reduce offensive odor and make the cigarette smoke soft.
The aromatic components of honeysuckle was prepared by using water extraction method and macroporous resin column chromatography,and the optimal conditions of water extraction process were obtained by single factor experiment:ratio of solid to liquid 1:9,extraction temperature 90℃,extraction 2 times.There were 38 components were identified by GC/MS,the main components were linalool,methyl hexadecanoate,hexadecanoic acid ethyl ester,octadecanoic acid ethyl ester,8,11-octadecadienoic acid methyl ester,linoleic acid ethyl ester,methyl linolenate,linolenic acid ethyl ester,hexadecanoic acid,oleic acid,(Z,Z)-9,12-octadecadienoic acid,(Z,Z,Z)-9,12,15-octadecatrien-1-ol,etc.The 0.05% aromatic components was added into cigerettes as a flavor.The results showed that it could enrich the smokey,enhance the notes of fresh aroma,reduce offensive odor and make the cigarette smoke soft.
2013, 28(4)
:24-28.
doi: 10.3969/j.issn.2095-476X.2013.04.006
Abstract:
Different kinds of extraction techniques:steam distillation,molecular distillation,simultaneous distillation and solvent extraction,spinning cone column distillation,continuous liquid-liquid extraction,continuous dynamic countercurrent extraction,solid-phase micro extraction,liquid-phase micro extraction,single-drop micro extraction,supercritical fluid extraction,microwave extraction,ultrahigh-pressure extraction,stir bar sorptive extraction,etc.were reviewed,and their advantages and disadvantages of natural tobacco flavors both in domestic and abroad in recent years were described.And the future research was prospected that the extraction with safety,energy-saving,low damage,high efficiency,wide adaptability will be the direction.
Different kinds of extraction techniques:steam distillation,molecular distillation,simultaneous distillation and solvent extraction,spinning cone column distillation,continuous liquid-liquid extraction,continuous dynamic countercurrent extraction,solid-phase micro extraction,liquid-phase micro extraction,single-drop micro extraction,supercritical fluid extraction,microwave extraction,ultrahigh-pressure extraction,stir bar sorptive extraction,etc.were reviewed,and their advantages and disadvantages of natural tobacco flavors both in domestic and abroad in recent years were described.And the future research was prospected that the extraction with safety,energy-saving,low damage,high efficiency,wide adaptability will be the direction.
2013, 28(4)
:29-33.
doi: 10.3969/j.issn.2095-476X.2013.04.007
Abstract:
The effects of temperature,relative humidity,air pressure and air flow of environmental conditions on CO release quantity of cigarette mainstream smoke were studied with mathematics statistics by SPSS V18.0,therefore uncertainties of CO test were evaluated based on the effects.The results showed as follows:temperature,relative humidity,air flow and air pressure of environmental conditions were correlated with CO release quantity of cigarette mainstream smoke;The coefficient factors of direct and indirect effects of temperature,relative humidity,air flow and air pressure of environmental conditions on CO of cigarette mainstream smoke were rt=0.040014,rh=-0.01201,rf=-0.02254,rp=0.318896,respectively;Without the coefficients of uncertainties,the combined standard uncertainty was ±0.40 mg.
The effects of temperature,relative humidity,air pressure and air flow of environmental conditions on CO release quantity of cigarette mainstream smoke were studied with mathematics statistics by SPSS V18.0,therefore uncertainties of CO test were evaluated based on the effects.The results showed as follows:temperature,relative humidity,air flow and air pressure of environmental conditions were correlated with CO release quantity of cigarette mainstream smoke;The coefficient factors of direct and indirect effects of temperature,relative humidity,air flow and air pressure of environmental conditions on CO of cigarette mainstream smoke were rt=0.040014,rh=-0.01201,rf=-0.02254,rp=0.318896,respectively;Without the coefficients of uncertainties,the combined standard uncertainty was ±0.40 mg.
2013, 28(4)
:34-36.
doi: 10.3969/j.issn.2095-476X.2013.04.008
Abstract:
The effects of different types of smoking machine on releasing amount of mainstream smoke were investigated.Under the same condition,4 samples were tested by using RM200A and RM20H smoking machine,respectively.After difference analysis on releasing amounts of TPM,moisture,tar,nicotine and CO in mainstream smoke and puff number,the results showed that the repeatability of results got from RM200A on releasing amounts of mainstream smoke was better than RM20H.For the same sample,the CO testing result from RM20H was greater than that from RM200A,both have significant differences.The nicotine content testing results from RM200A were greater than that from RM20H,and moisture content was just the opposite above the 7 mg samples.
The effects of different types of smoking machine on releasing amount of mainstream smoke were investigated.Under the same condition,4 samples were tested by using RM200A and RM20H smoking machine,respectively.After difference analysis on releasing amounts of TPM,moisture,tar,nicotine and CO in mainstream smoke and puff number,the results showed that the repeatability of results got from RM200A on releasing amounts of mainstream smoke was better than RM20H.For the same sample,the CO testing result from RM20H was greater than that from RM200A,both have significant differences.The nicotine content testing results from RM200A were greater than that from RM20H,and moisture content was just the opposite above the 7 mg samples.
2013, 28(4)
:37-39.
doi: 10.3969/j.issn.2095-476X.2013.04.009
Abstract:
In order to solve the quality problems such as distortion of the cigarettes,which was brought by the output device of cigarettes in PROTOS MAX70 in the process of production,according to the advanced technology of cigarette stacker applied in PROTOS 2-2 super high-speed cigarette maker produced by German Company HAUNI,the cigarettes output system of MAX70 was improved by canceling the cigarettes output belts of MAX70 and designing a flexible stack drum behind the output drum and grouping output of cigarette stacker.And the results showed that after the system had been improved,the total percentage of the troubles of cigarette output device and quality defects of cigarettes was lowered from 80.9% to 10% and 0.27% to 0.11% respectively.
In order to solve the quality problems such as distortion of the cigarettes,which was brought by the output device of cigarettes in PROTOS MAX70 in the process of production,according to the advanced technology of cigarette stacker applied in PROTOS 2-2 super high-speed cigarette maker produced by German Company HAUNI,the cigarettes output system of MAX70 was improved by canceling the cigarettes output belts of MAX70 and designing a flexible stack drum behind the output drum and grouping output of cigarette stacker.And the results showed that after the system had been improved,the total percentage of the troubles of cigarette output device and quality defects of cigarettes was lowered from 80.9% to 10% and 0.27% to 0.11% respectively.
2013, 28(4)
:40-44.
doi: 10.3969/j.issn.2095-476X.2013.04.010
Abstract:
Effects of two key technologies-frying and vacuum osmotic treatment on the quality of frozen flavor crayfish were studied with the determination of weight loss in frying,weight gain rate during permeating,sensory scores and the texture indexes of products.The results showed that the proper processing condition was frying for 4 min at the temperature of 160℃. With the comparison of the changes of weight gain rate of two pressure conditions of atmosphere pressure and vacuum pressure adapted in the osmotic process,it was found that vacuum treatment could effectively improve the efficiency of osmotic process.The results of sensory scores and texture of products indicated that 10 h would be the best for the quality of frozen flavor crayfish.
Effects of two key technologies-frying and vacuum osmotic treatment on the quality of frozen flavor crayfish were studied with the determination of weight loss in frying,weight gain rate during permeating,sensory scores and the texture indexes of products.The results showed that the proper processing condition was frying for 4 min at the temperature of 160℃. With the comparison of the changes of weight gain rate of two pressure conditions of atmosphere pressure and vacuum pressure adapted in the osmotic process,it was found that vacuum treatment could effectively improve the efficiency of osmotic process.The results of sensory scores and texture of products indicated that 10 h would be the best for the quality of frozen flavor crayfish.
2013, 28(4)
:45-47.
doi: 10.3969/j.issn.2095-476X.2013.04.011
Abstract:
The traditional vacuum fried fruit and vegetable chips have high oil content and the quality needs to be improved.The process of vacuum fried mushroom chips was studied.Hot air speed,moisture conversion point,hot air drying temperature and vacuum frying temperature were used as factors,orthogonal experiment was made.With oil content and sensory index as indicator,the optimum parameters of the vaccumfried and hot air combined drying of mushroom chip were obtained as follows:hot air speed 1.0 m/s,moisture conversion point 35%,hot air drying temperature 65℃,vacuum frying temperature 90℃.The oil content of combined drying mushroom chips was 1.78% less than traditional vacuum fried,and the product sensory quality had been improved.
The traditional vacuum fried fruit and vegetable chips have high oil content and the quality needs to be improved.The process of vacuum fried mushroom chips was studied.Hot air speed,moisture conversion point,hot air drying temperature and vacuum frying temperature were used as factors,orthogonal experiment was made.With oil content and sensory index as indicator,the optimum parameters of the vaccumfried and hot air combined drying of mushroom chip were obtained as follows:hot air speed 1.0 m/s,moisture conversion point 35%,hot air drying temperature 65℃,vacuum frying temperature 90℃.The oil content of combined drying mushroom chips was 1.78% less than traditional vacuum fried,and the product sensory quality had been improved.
2013, 28(4)
:48-51.
doi: 10.3969/j.issn.2095-476X.2013.04.012
Abstract:
The effects of nitrogen source types and compositions on the propionic acid fermentation were examined.The results showed that organic nitrogen was better than inorganic nitrogen,the mixed organic nitrogen were better than single ones.The optimum nitrogen source conditions by single-factor experiment and orthogonal experiment were determined:yeast extract and tryptic soy broth as mixed nitrogen source,mixed ratio 2:1,the concentration of nitrogen source 22 g/L.Under the optimal conditions,the yield of propionic acid was 22.89 g/L after 192 h of fermentation,which increased 26.46% compared with that before the optimization.
The effects of nitrogen source types and compositions on the propionic acid fermentation were examined.The results showed that organic nitrogen was better than inorganic nitrogen,the mixed organic nitrogen were better than single ones.The optimum nitrogen source conditions by single-factor experiment and orthogonal experiment were determined:yeast extract and tryptic soy broth as mixed nitrogen source,mixed ratio 2:1,the concentration of nitrogen source 22 g/L.Under the optimal conditions,the yield of propionic acid was 22.89 g/L after 192 h of fermentation,which increased 26.46% compared with that before the optimization.
2013, 28(4)
:52-54.
doi: 10.3969/j.issn.2095-476X.2013.04.013
Abstract:
The samples of soil,leaves were selected as the research objects.The content of Pb and Cd in the different samples was determined by graphite furnace atomic absorption spectrometry.The results showed that the Pb and Cd content in dyeing mill downstream bed soil samples and the leaves of near Wenhua and Agricultural roads was higher.The content of heavy metal Pb and Cd in washed leaves samples was less than the corresponding original sample.This indicated that Zhengzhou city environment has been polluted by different levels of heavy metals Pb and Cd.
The samples of soil,leaves were selected as the research objects.The content of Pb and Cd in the different samples was determined by graphite furnace atomic absorption spectrometry.The results showed that the Pb and Cd content in dyeing mill downstream bed soil samples and the leaves of near Wenhua and Agricultural roads was higher.The content of heavy metal Pb and Cd in washed leaves samples was less than the corresponding original sample.This indicated that Zhengzhou city environment has been polluted by different levels of heavy metals Pb and Cd.
2013, 28(4)
:55-58.
doi: 10.3969/j.issn.2095-476X.2013.04.014
Abstract:
According to the feature that the zero sequence of fault line significantly different from the non-zero sequence fault line in the high-order harmonic admittance conditions,combined with the characteristics of wavelet packet division and small angle to ground zero sequence fault current characteristics, a new method was proposed basing on an improved zero sequence admittance. This method makes full use of the transient fault line information and comprehensive utilization of zero sequence admittance wavelet packet reconstruct coefficient amplitude and polarity information to improve the selection and line sensitivity.Through PSCAD simulation and results showed that this method was not affected by the degree of compensation,fault location,the value of the transition resistance and the failure angle and it was able to elect fault line effectively and reliably.
According to the feature that the zero sequence of fault line significantly different from the non-zero sequence fault line in the high-order harmonic admittance conditions,combined with the characteristics of wavelet packet division and small angle to ground zero sequence fault current characteristics, a new method was proposed basing on an improved zero sequence admittance. This method makes full use of the transient fault line information and comprehensive utilization of zero sequence admittance wavelet packet reconstruct coefficient amplitude and polarity information to improve the selection and line sensitivity.Through PSCAD simulation and results showed that this method was not affected by the degree of compensation,fault location,the value of the transition resistance and the failure angle and it was able to elect fault line effectively and reliably.
2013, 28(4)
:59-63.
doi: 10.3969/j.issn.2095-476X.2013.04.015
Abstract:
A dual threshold multiple multi-dimensional interval-valued fuzzy inference method based on similarity measure of interval-valued fuzzy sets was put forward. An OWA operator weighting method based on combinatorial number is used to calculate the weight of each interval-valued fuzzy rule antecedent, and in the calculation of similarity measure of interval-valued fuzzy sets, consider the effect of the upper and lower range of interval-values are different for calculating the similarity measure, and the importance of each factor or attribute for the conclusion is different, so as to filter out some unnecessary rules.Example analysis showed that this method is closer to the actual inference, the results are convenient for application.
A dual threshold multiple multi-dimensional interval-valued fuzzy inference method based on similarity measure of interval-valued fuzzy sets was put forward. An OWA operator weighting method based on combinatorial number is used to calculate the weight of each interval-valued fuzzy rule antecedent, and in the calculation of similarity measure of interval-valued fuzzy sets, consider the effect of the upper and lower range of interval-values are different for calculating the similarity measure, and the importance of each factor or attribute for the conclusion is different, so as to filter out some unnecessary rules.Example analysis showed that this method is closer to the actual inference, the results are convenient for application.
2013, 28(4)
:64-68.
doi: 10.3969/j.issn.2095-476X.2013.04.016
Abstract:
In view of the inefficiency and difficulty to guarantee the accuracy of the current crop disease diagnosis,the feature extraction method was put forwarded using computer image processing technology of cotton mite disease spot. The method used the infected leave of cotton red mites as the research object and used median filtering method to effectively remove the interference of noise;then the mite lesion area was effectively separated from the diseased leaves image by combining the algorithm of excess green feature 2G-R-B and the area threshold method.At last,the eight shapes of values which related to the lesion area were extracted through the use of the binary image area notation according to the split lesion samples.Based on the analysis of the data obtained from spot,4 relative value features such as roundness,elongation of compactness and inscribed circle radius can effectively reflect the shape features of lesion which can be used as one of the basis for identification of disease symptoms.The experiment results showed that the area of cotton red mite lesion could be effectively divided and the shape features of the mite lesion were accurately extracted,which could lay the foundation for the disease identification and diagnosis.
In view of the inefficiency and difficulty to guarantee the accuracy of the current crop disease diagnosis,the feature extraction method was put forwarded using computer image processing technology of cotton mite disease spot. The method used the infected leave of cotton red mites as the research object and used median filtering method to effectively remove the interference of noise;then the mite lesion area was effectively separated from the diseased leaves image by combining the algorithm of excess green feature 2G-R-B and the area threshold method.At last,the eight shapes of values which related to the lesion area were extracted through the use of the binary image area notation according to the split lesion samples.Based on the analysis of the data obtained from spot,4 relative value features such as roundness,elongation of compactness and inscribed circle radius can effectively reflect the shape features of lesion which can be used as one of the basis for identification of disease symptoms.The experiment results showed that the area of cotton red mite lesion could be effectively divided and the shape features of the mite lesion were accurately extracted,which could lay the foundation for the disease identification and diagnosis.
2013, 28(4)
:69-73,77.
doi: 10.3969/j.issn.2095-476X.2013.04.017
Abstract:
In order to improve the leveling precision and reduce the leveling time of the vehicle asphalt cement mortar mixing platform, the automatic leveling system was developed based on PLC. The leveling problem of the system turns into predictive controlling to the geometric height difference between the each point and the highest point based on the mathematical relationship between the slant angles and the leg elongations to realize the control of three legs moving together. The results showed that the leveling accuracy of the system reaches ±0.3° and the leveling time is less than 6 s, realized the mortar vehicle mixing platform fast automatic leveling.
In order to improve the leveling precision and reduce the leveling time of the vehicle asphalt cement mortar mixing platform, the automatic leveling system was developed based on PLC. The leveling problem of the system turns into predictive controlling to the geometric height difference between the each point and the highest point based on the mathematical relationship between the slant angles and the leg elongations to realize the control of three legs moving together. The results showed that the leveling accuracy of the system reaches ±0.3° and the leveling time is less than 6 s, realized the mortar vehicle mixing platform fast automatic leveling.
2013, 28(4)
:74-77.
doi: 10.3969/j.issn.2095-476X.2013.04.018
Abstract:
Aimed at the problems that PKI authentication process is too onerous,construction and maintenance costs are high,and there is key escrow in IBC certification model in the existing grid authentication model,the behavior trust relationship between the resource providers and resource requester in the intra-and inter-domain was studied.We make use of the trust relationship to introduce the concept of temporary trust domain in the combination of the existing PKI and IBC certification model.The grid authentiation model based on the trust domain was designed.Simulation results showed that the model had low traffic and shorter authentieation time.
Aimed at the problems that PKI authentication process is too onerous,construction and maintenance costs are high,and there is key escrow in IBC certification model in the existing grid authentication model,the behavior trust relationship between the resource providers and resource requester in the intra-and inter-domain was studied.We make use of the trust relationship to introduce the concept of temporary trust domain in the combination of the existing PKI and IBC certification model.The grid authentiation model based on the trust domain was designed.Simulation results showed that the model had low traffic and shorter authentieation time.
2013, 28(4)
:78-81.
doi: 10.3969/j.issn.2095-476X.2013.04.019
Abstract:
In order to improve the interaction between salesman and customers,an online shopping system was designed based on Web Service combined with the mobile platform.The system used Oracle database and the Struts2 framework,adopt XFire,a new Java Web Service engine,to publish and utilize Web Service in the proposed system,and satisfied the communication between heterogeneous platforms by jointing the mobile short message system.Customers would receive the prompting message of every link in the process which is from confirming the deal to signing for the goods.With the diversity of the terminal customer shopping,in consideration the hybrid shopping model of online shopping and unregistered users teleshopping was realized.Experiment results showed that the system had high interactivity,flexibility and scalability enough to meet the need of online shopping.
In order to improve the interaction between salesman and customers,an online shopping system was designed based on Web Service combined with the mobile platform.The system used Oracle database and the Struts2 framework,adopt XFire,a new Java Web Service engine,to publish and utilize Web Service in the proposed system,and satisfied the communication between heterogeneous platforms by jointing the mobile short message system.Customers would receive the prompting message of every link in the process which is from confirming the deal to signing for the goods.With the diversity of the terminal customer shopping,in consideration the hybrid shopping model of online shopping and unregistered users teleshopping was realized.Experiment results showed that the system had high interactivity,flexibility and scalability enough to meet the need of online shopping.
2013, 28(4)
:82-85,94.
doi: 10.3969/j.issn.2095-476X.2013.04.020
Abstract:
The serially concatenated minimum shift keying (MSK) system with bit-interleaver when the receiver employs iterative decoding and demodulation was investigated.Compared with serially concatenated code which employed traditional shift keying modulation,serially concatenated MSK with bit-interleaver had a better performance with high bandwidth efficiency.Theoretical analysis and performance simulation results showed that:The influence of interleaving scheme system performance was very large and the pseudorandom interleaver was the ideal option;meanwhile,serial concatenated MSK system performance improved with the increase of the interleaving length and the number of iterations.When the number of iterations reached a certain number of times,continuous increase of the number of iterations had limited function in the performance improvement of the system.Usually the number of iterations was less than 12 times.The outer code was convolutional code with constraint length 3,which was a better choice.
The serially concatenated minimum shift keying (MSK) system with bit-interleaver when the receiver employs iterative decoding and demodulation was investigated.Compared with serially concatenated code which employed traditional shift keying modulation,serially concatenated MSK with bit-interleaver had a better performance with high bandwidth efficiency.Theoretical analysis and performance simulation results showed that:The influence of interleaving scheme system performance was very large and the pseudorandom interleaver was the ideal option;meanwhile,serial concatenated MSK system performance improved with the increase of the interleaving length and the number of iterations.When the number of iterations reached a certain number of times,continuous increase of the number of iterations had limited function in the performance improvement of the system.Usually the number of iterations was less than 12 times.The outer code was convolutional code with constraint length 3,which was a better choice.
2013, 28(4)
:86-90.
doi: 10.3969/j.issn.2095-476X.2013.04.021
Abstract:
In order to achieve the constraints of equipment slot port addition in the communication resource management system,the Struts+Spring framework was adopted with Struts2 Ajax validation in this system,through the rational allocation of check conditions and configuration files.It fully realized the constraints function of addition attributes,thus met the actual needs of the communication.
In order to achieve the constraints of equipment slot port addition in the communication resource management system,the Struts+Spring framework was adopted with Struts2 Ajax validation in this system,through the rational allocation of check conditions and configuration files.It fully realized the constraints function of addition attributes,thus met the actual needs of the communication.
2013, 28(4)
:91-94.
doi: 10.3969/j.issn.2095-476X.2013.04.022
Abstract:
A bacterial DNA based information hiding scheme was proposed by utilizing the recombinant DNA technology as well as the resistance of bacteria.In this scheme recombinant DNA experimental conditions and bacterial resistance were the key.Vector DNA molecules and redundant DNA molecules were mixed together and then receptor bacteria and redundant bacteria were mixed together.Thus the plaintext was hidden twice.Random attempt may not only destroy the ciphertext but also miss the plaintext.Security analysis showed that the proposed scheme had strong security.
A bacterial DNA based information hiding scheme was proposed by utilizing the recombinant DNA technology as well as the resistance of bacteria.In this scheme recombinant DNA experimental conditions and bacterial resistance were the key.Vector DNA molecules and redundant DNA molecules were mixed together and then receptor bacteria and redundant bacteria were mixed together.Thus the plaintext was hidden twice.Random attempt may not only destroy the ciphertext but also miss the plaintext.Security analysis showed that the proposed scheme had strong security.
2013, 28(4)
:95-98.
doi: 10.3969/j.issn.2095-476X.2013.04.023
Abstract:
The algorithm based on three-phase approach to solve the logistics vehicle routing problem(VPR) was proposed, in which three kinds of technologies-Floyd algorithm, saving method and genetic algorithm-were fused. The algorithm overcame the shortcomings of premature convergence and low efficiency of the genetic algorithm by using floyd algorithm to solve all-pairs shortest-path problem, using saving method for loop expansion, and using genetic algorithm to find the optimal solution. The experimental results showed that the algorithm had preferable application value on VPR.
The algorithm based on three-phase approach to solve the logistics vehicle routing problem(VPR) was proposed, in which three kinds of technologies-Floyd algorithm, saving method and genetic algorithm-were fused. The algorithm overcame the shortcomings of premature convergence and low efficiency of the genetic algorithm by using floyd algorithm to solve all-pairs shortest-path problem, using saving method for loop expansion, and using genetic algorithm to find the optimal solution. The experimental results showed that the algorithm had preferable application value on VPR.
2013, 28(4)
:99-102,108.
doi: 10.3969/j.issn.2095-476X.2013.04.024
Abstract:
The evaluation and classification technology of major hazard facilities were explored according to the monitoring and management needs.Taking advantage of the complete and accurate evaluation capacity of fuzzy evaluation model,the evaluation factors related to harm degree were identified,and a data model for evaluating the harm degree of major hazard facilities and an appropriate monitoring and management system for different types of major hazard facilities were established.For the same type major hazard facilities,a horizontal evaluation model based on Borda ranking method was built to rank their harm degree,and the corresponding monitoring and management measures were customized based on their ranks to improve the efficiency and reduce the costs for monitoring and management of major hazard facilities.
The evaluation and classification technology of major hazard facilities were explored according to the monitoring and management needs.Taking advantage of the complete and accurate evaluation capacity of fuzzy evaluation model,the evaluation factors related to harm degree were identified,and a data model for evaluating the harm degree of major hazard facilities and an appropriate monitoring and management system for different types of major hazard facilities were established.For the same type major hazard facilities,a horizontal evaluation model based on Borda ranking method was built to rank their harm degree,and the corresponding monitoring and management measures were customized based on their ranks to improve the efficiency and reduce the costs for monitoring and management of major hazard facilities.
2013, 28(4)
:103-108.
doi: 10.3969/j.issn.2095-476X.2013.04.025
Abstract:
The DEA evaluation model of information delay systems was constructed using the GM (1,1) model to obtain the hysteresis information and the evaluation method of cost-effectiveness of IHEs based on DEA was studied.The simulation results showed that the model had a better effect on the discrimination of the evaluation and decision,as well as the anastomosis with the actual development.
The DEA evaluation model of information delay systems was constructed using the GM (1,1) model to obtain the hysteresis information and the evaluation method of cost-effectiveness of IHEs based on DEA was studied.The simulation results showed that the model had a better effect on the discrimination of the evaluation and decision,as well as the anastomosis with the actual development.
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
Deputy Editor-in-Chief：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
