2011 Vol. 26, No. 1
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2011, 26(1)
:1-4.
doi: 10.3969/j.issn.1004-1478.2011.01.001
Abstract:
The aroma components of apricot fruit were extracted by solid-phase microextraction (SPME).These aroma components were isolated and identified by capillary GC-MS method, and 60 compounds were identified, amounting to total mass fraction of 92.08%.The main flavor compounds were:acids (32.60%), alcohols(18.45%), aldehydes (18.10%), esters (13.95%), ketones (2.84%) etc.Tobacco flavoring experiment showed that apricot extraction could impart sweetness, fruit aroma to cigarettes, improve the aroma softness, decrease the irritation of the cigarettes and improve the cigarettes quality clearly.The addition should be different.The effects will be excellent with the addition of 0.05%~0.1%.
The aroma components of apricot fruit were extracted by solid-phase microextraction (SPME).These aroma components were isolated and identified by capillary GC-MS method, and 60 compounds were identified, amounting to total mass fraction of 92.08%.The main flavor compounds were:acids (32.60%), alcohols(18.45%), aldehydes (18.10%), esters (13.95%), ketones (2.84%) etc.Tobacco flavoring experiment showed that apricot extraction could impart sweetness, fruit aroma to cigarettes, improve the aroma softness, decrease the irritation of the cigarettes and improve the cigarettes quality clearly.The addition should be different.The effects will be excellent with the addition of 0.05%~0.1%.
2011, 26(1)
:5-8.
doi: 10.3969/j.issn.1004-1478.2011.01.002
Abstract:
The effect of origin,part and variety at major phenolic compounds of mainstream smoke,and the relativity of contents of major phenolic compounds in mainstream smoke with the smoking quality were investigated.The results showed that the origin,position and variety were huge to contents of these compounds,including diphenol,resorcinol,catechol,phenol,m-cresol,p-cresol,and o-cresol,CV15%,the maximum approximately remained at 80%,in which,the position was the key determinant,the biggest CV was 63.5%;the contents of these seven compounds had a complicated relativities,which had the significant positive correlation with one another.The results of bivariate and factor analysis showed that the smoking quality were influenced by these seven compounds.With the increase of comprehensive factor score,the scores of physiological and taste strength would increase,while moist degree and irritancy would reduce,and the flavor of aroma would tend to heavy,but hardly change the aftertaste,offensive odor and aroma.
The effect of origin,part and variety at major phenolic compounds of mainstream smoke,and the relativity of contents of major phenolic compounds in mainstream smoke with the smoking quality were investigated.The results showed that the origin,position and variety were huge to contents of these compounds,including diphenol,resorcinol,catechol,phenol,m-cresol,p-cresol,and o-cresol,CV15%,the maximum approximately remained at 80%,in which,the position was the key determinant,the biggest CV was 63.5%;the contents of these seven compounds had a complicated relativities,which had the significant positive correlation with one another.The results of bivariate and factor analysis showed that the smoking quality were influenced by these seven compounds.With the increase of comprehensive factor score,the scores of physiological and taste strength would increase,while moist degree and irritancy would reduce,and the flavor of aroma would tend to heavy,but hardly change the aftertaste,offensive odor and aroma.
2011, 26(1)
:9-12,16.
doi: 10.3969/j.issn.1004-1478.2011.01.003
Abstract:
The effects of titanium added to soil on some physiological property were studied.The results showed that the content of chlorophyll,carotenoid and the invertase activity were increased after irrigating right amount titanium at root elongation stage,titanium could promote photosynthesis in flue-cured tobacco,which also was beneficial for the transformation and utiliation of assimilate.At the same time,titanium could improve the activities of POD and SOD,but reduced MDA contents,thus decreasing the degree of membrane-lipid peroxidation and enhancing the ability of anti-ageing and stress resistance.The effect of titanium fertilizer irrigated root was obviously reflected in a short time.When rich-titanium synergist diluted 600 times was poured to root,the result was better than other concentrations.
The effects of titanium added to soil on some physiological property were studied.The results showed that the content of chlorophyll,carotenoid and the invertase activity were increased after irrigating right amount titanium at root elongation stage,titanium could promote photosynthesis in flue-cured tobacco,which also was beneficial for the transformation and utiliation of assimilate.At the same time,titanium could improve the activities of POD and SOD,but reduced MDA contents,thus decreasing the degree of membrane-lipid peroxidation and enhancing the ability of anti-ageing and stress resistance.The effect of titanium fertilizer irrigated root was obviously reflected in a short time.When rich-titanium synergist diluted 600 times was poured to root,the result was better than other concentrations.
2011, 26(1)
:13-16.
doi: 10.3969/j.issn.1004-1478.2011.01.004
Abstract:
The amount of several tobacco aroma components in tobacco was studied.The results showed that the appropriate rate of six spices was solanon 37.5×10-4%~50.0×10-4%,megastigmatrienones 50.0×10-4%~75.0×10-4%,dihydroactinidiolide 3.75×10-4%~5.00×10-4%,β-damascone 7.5×10-4%~12.5×10-4%,2-acctylpyrazine 10-4%~2.0×10-4%,ketoisophorone 10-2%~1.5×10-2%.
The amount of several tobacco aroma components in tobacco was studied.The results showed that the appropriate rate of six spices was solanon 37.5×10-4%~50.0×10-4%,megastigmatrienones 50.0×10-4%~75.0×10-4%,dihydroactinidiolide 3.75×10-4%~5.00×10-4%,β-damascone 7.5×10-4%~12.5×10-4%,2-acctylpyrazine 10-4%~2.0×10-4%,ketoisophorone 10-2%~1.5×10-2%.
2011, 26(1)
:17-21.
doi: 10.3969/j.issn.1004-1478.2011.01.005
Abstract:
The variation of the main chemical components of flue-cured tobacco leaves from Guangdong tobacco-growing areas during 2003 to 2006 was analyzed.The results showed that:contents of total sugar,reducing sugar and the ratio of reducing sugar to nicotine were high in total;the content of chlorine was low and had a big variation;the ratio of potassium to chlorine was high but unstable.The difference of chemical components of flue-cured tobacco leaves among grades was significant except chlorine content and the ratio of potassium to chlorine;the difference of chemical components of flue-cured tobacco leaves among cultivars was not significant except contents of potassium and total nitrogen;the difference of chlorine content and the ratio of potassium to chlorine among years was unstable;the difference of chemical components among areas was significant at extreme level.The difference of chemical components of flue-cured tobacco leaves between Guangdong and Zimbabwe was significant.As far as upper leaf is concerned,contents of the main chemical compositions of the two different origins are similar.
The variation of the main chemical components of flue-cured tobacco leaves from Guangdong tobacco-growing areas during 2003 to 2006 was analyzed.The results showed that:contents of total sugar,reducing sugar and the ratio of reducing sugar to nicotine were high in total;the content of chlorine was low and had a big variation;the ratio of potassium to chlorine was high but unstable.The difference of chemical components of flue-cured tobacco leaves among grades was significant except chlorine content and the ratio of potassium to chlorine;the difference of chemical components of flue-cured tobacco leaves among cultivars was not significant except contents of potassium and total nitrogen;the difference of chlorine content and the ratio of potassium to chlorine among years was unstable;the difference of chemical components among areas was significant at extreme level.The difference of chemical components of flue-cured tobacco leaves between Guangdong and Zimbabwe was significant.As far as upper leaf is concerned,contents of the main chemical compositions of the two different origins are similar.
2011, 26(1)
:22-25.
doi: 10.3969/j.issn.1004-1478.2011.01.006
Abstract:
The 35 years data of temperature and sunshine duration under different growth stages in Sanmenxia tobacco-growing areas were analyzed.The results showed that temperature and sunshine duration in 1980s were the lowest under different decades.The maximum of sunshine duration was in 1990s(1272.91 h) and the highest temperature value(21.72℃) occurred after the 2000s.The sunshine duration of root spreading stage,fast growing stage and maturing stage during 35 years showed decreasing trend,while the temperature showed increasing trend.
The 35 years data of temperature and sunshine duration under different growth stages in Sanmenxia tobacco-growing areas were analyzed.The results showed that temperature and sunshine duration in 1980s were the lowest under different decades.The maximum of sunshine duration was in 1990s(1272.91 h) and the highest temperature value(21.72℃) occurred after the 2000s.The sunshine duration of root spreading stage,fast growing stage and maturing stage during 35 years showed decreasing trend,while the temperature showed increasing trend.
2011, 26(1)
:26-29.
doi: 10.3969/j.issn.1004-1478.2011.01.007
Abstract:
To control the percentage of oversized tobacco leaves and ensure the large and medium,the effect of the thresher frame's tobacco redrying line on threshing quality was analyzed.The measure that the frame's openings size of first class thresher was made into different sizes to improve the leaf structure was put forward.After improvement,the aperture of the third,the 4th and the 5th rows of the frame was changed into 110 mm×(80±1) mm and the aperture of the first,the second,the 6th and the 7th rows of the frame was changed into 110 mm×(72±1) mm respectively.As a result,the percentage of large and medium tobacco leaves raised from 86.9% to 87.6%,the percentage of the 50 mm×50 mm scaled out tobacco leaves decreased from 26.2% to 21.6%.
To control the percentage of oversized tobacco leaves and ensure the large and medium,the effect of the thresher frame's tobacco redrying line on threshing quality was analyzed.The measure that the frame's openings size of first class thresher was made into different sizes to improve the leaf structure was put forward.After improvement,the aperture of the third,the 4th and the 5th rows of the frame was changed into 110 mm×(80±1) mm and the aperture of the first,the second,the 6th and the 7th rows of the frame was changed into 110 mm×(72±1) mm respectively.As a result,the percentage of large and medium tobacco leaves raised from 86.9% to 87.6%,the percentage of the 50 mm×50 mm scaled out tobacco leaves decreased from 26.2% to 21.6%.
2011, 26(1)
:30-33.
doi: 10.3969/j.issn.1004-1478.2011.01.008
Abstract:
Formation conditions and texture about the mixed system of oat β-glucan/isolated soy protein(OG/SPI) were investigated.The results showed that the OG/SPI mixture formed thermoreversible gels on storage for a period of time in 4℃ and 25℃,but cold storage conditions was better to the forming of gels.Compared with the single gel OG,OG/SPI mixed gel system reduced development time,and a lower concentration could form gels.When the mass fraction was higher and the mixture ratio was 8:2,the gelling properties of OG/SPI mixed gel was better.In addition,increasing pH value and adding fitting cane Ca2+ could improve the OG/SPI mixed gel texture properties.
Formation conditions and texture about the mixed system of oat β-glucan/isolated soy protein(OG/SPI) were investigated.The results showed that the OG/SPI mixture formed thermoreversible gels on storage for a period of time in 4℃ and 25℃,but cold storage conditions was better to the forming of gels.Compared with the single gel OG,OG/SPI mixed gel system reduced development time,and a lower concentration could form gels.When the mass fraction was higher and the mixture ratio was 8:2,the gelling properties of OG/SPI mixed gel was better.In addition,increasing pH value and adding fitting cane Ca2+ could improve the OG/SPI mixed gel texture properties.
2011, 26(1)
:34-38.
doi: 10.3969/j.issn.1004-1478.2011.01.009
Abstract:
Corn zein was obtained via ethyl alcohol extraction method,alkali-extraction and acid precipitation method and salting-out method with corn gluten meal as raw material.Extraction conditions were optimized through orthogonal test.The results showed that ethyl alcohol extraction method was the optimal method which not only the extraction rate of zein was high,but also the denaturation degree of corn zein was weak.The optimum extraction technology of ethyl alcohol extraction method was obtained as follows:temperature 60℃,solid-liquid ratio 1 g/8 mL,time 5 h,ethanol concentration 80%;extraction rate was 82.21%,denaturation degree was 10.23%.
Corn zein was obtained via ethyl alcohol extraction method,alkali-extraction and acid precipitation method and salting-out method with corn gluten meal as raw material.Extraction conditions were optimized through orthogonal test.The results showed that ethyl alcohol extraction method was the optimal method which not only the extraction rate of zein was high,but also the denaturation degree of corn zein was weak.The optimum extraction technology of ethyl alcohol extraction method was obtained as follows:temperature 60℃,solid-liquid ratio 1 g/8 mL,time 5 h,ethanol concentration 80%;extraction rate was 82.21%,denaturation degree was 10.23%.
2011, 26(1)
:39-42.
doi: 10.3969/j.issn.1004-1478.2011.01.010
Abstract:
The peanut oil supercritical extract technology under the low temperature was studied.By using the single factor experiment,the impact of the extraction pressure,temperature,particle size peanut,CO2 gas flow rate on the peanut oil extraction was investigated.By using the uniform experimental design the peanut oil supercritical extract's best technological conditions were establishmented when the degree of pulverization was 20 items,the extract time was 2 h,extract pressure was 39 MPa,the extract temperature was 59℃,gas flow amount was 30 kg/h,the extraction yield was above 95%,the peanut oil quality was good,the peanut original delicate fragrance taste was pure.The retention rate of peanut meal protein activity is above the 93%.
The peanut oil supercritical extract technology under the low temperature was studied.By using the single factor experiment,the impact of the extraction pressure,temperature,particle size peanut,CO2 gas flow rate on the peanut oil extraction was investigated.By using the uniform experimental design the peanut oil supercritical extract's best technological conditions were establishmented when the degree of pulverization was 20 items,the extract time was 2 h,extract pressure was 39 MPa,the extract temperature was 59℃,gas flow amount was 30 kg/h,the extraction yield was above 95%,the peanut oil quality was good,the peanut original delicate fragrance taste was pure.The retention rate of peanut meal protein activity is above the 93%.
2011, 26(1)
:43-46.
doi: 10.3969/j.issn.1004-1478.2011.01.011
Abstract:
Nano-SiO2 microspheres were synthesized via sol-gel process,then SnO2 particles was coated on.The prepared composite was characterized by X ray diffraction and transmission electron microscopy,results showed that SnO2 was successfully coated on the surface of SiO2,and the composite still preserved the original good dispersion of SiO2 microsphere.The composite was then used as lithium ion battery anode material and its electrochemical property was tested,date showed that the composite had an excellent cycle performance.Compared with the pure SnO2,although the composite has a little lower charge-discharge capacity at first cycle.However,after 20 cycles its charge-discharge capacity was 105.6% and 80.7% more than the former,respectively.So the composite prepared by this method has a good application foreground.
Nano-SiO2 microspheres were synthesized via sol-gel process,then SnO2 particles was coated on.The prepared composite was characterized by X ray diffraction and transmission electron microscopy,results showed that SnO2 was successfully coated on the surface of SiO2,and the composite still preserved the original good dispersion of SiO2 microsphere.The composite was then used as lithium ion battery anode material and its electrochemical property was tested,date showed that the composite had an excellent cycle performance.Compared with the pure SnO2,although the composite has a little lower charge-discharge capacity at first cycle.However,after 20 cycles its charge-discharge capacity was 105.6% and 80.7% more than the former,respectively.So the composite prepared by this method has a good application foreground.
2011, 26(1)
:47-50.
doi: 10.3969/j.issn.1004-1478.2011.01.012
Abstract:
The solubilization of ethyl benzene has been studied in mixed systems of dodecyl polyoxyethylene ether sulphate(AES,AESA)and dodecyl sulfate with different ratio of mixed surfactant of dodecyl polyoxyethylene Ether(AEO9),dodecyl trimethyl ammonia chloride(1231),coconut oil amide propyl betaine(CAB)respectively.The results showed that the solubilizing ability of anionic-nonionic surfactant increased with the quantity of nonionic surfactant enlarging.Besides,the solubilizing ability of anionic-cationic(or zwitterionic) surfactant increased in proportion to the quantity of cationic(or zwitterionic)surfactant.With the inorganic salt being added,the solubilization of anionic-nonionic surfactant has been improved,showing the relation of solubilization of the inorganic salt surfactants as CaCl2MgSO4NaCl.
The solubilization of ethyl benzene has been studied in mixed systems of dodecyl polyoxyethylene ether sulphate(AES,AESA)and dodecyl sulfate with different ratio of mixed surfactant of dodecyl polyoxyethylene Ether(AEO9),dodecyl trimethyl ammonia chloride(1231),coconut oil amide propyl betaine(CAB)respectively.The results showed that the solubilizing ability of anionic-nonionic surfactant increased with the quantity of nonionic surfactant enlarging.Besides,the solubilizing ability of anionic-cationic(or zwitterionic) surfactant increased in proportion to the quantity of cationic(or zwitterionic)surfactant.With the inorganic salt being added,the solubilization of anionic-nonionic surfactant has been improved,showing the relation of solubilization of the inorganic salt surfactants as CaCl2MgSO4NaCl.
2011, 26(1)
:51-53.
doi: 10.3969/j.issn.1004-1478.2011.01.013
Abstract:
Using steel plant dust,manganese carbonate was prepared by reaction of acid-leaching,purification,precipitation and replacement reaction.The effects of the leaching temperature,the leaching time,the mass ratio of sulfuric acid to steel dust on the leaching yield of manganese were investigated by the orthogonal test methods.The optimum leaching conditions were as follows:the mass ratio of sulfuric acid to steel dust 4:1,the leaching temperature 70℃,time 2 h,the leaching yield of manganese was 87.7%.By means of single factor experiments,the optimal carbonization conditions were obtained:n((NH4)2CO3):n(MnSO4)=2:1,the reaction temperature was 60℃,pH=7,the aging time was 30 min,and the yield of manganese carbonate reached 91%.The prepared manganese carbonate accords with GB10503-89.
Using steel plant dust,manganese carbonate was prepared by reaction of acid-leaching,purification,precipitation and replacement reaction.The effects of the leaching temperature,the leaching time,the mass ratio of sulfuric acid to steel dust on the leaching yield of manganese were investigated by the orthogonal test methods.The optimum leaching conditions were as follows:the mass ratio of sulfuric acid to steel dust 4:1,the leaching temperature 70℃,time 2 h,the leaching yield of manganese was 87.7%.By means of single factor experiments,the optimal carbonization conditions were obtained:n((NH4)2CO3):n(MnSO4)=2:1,the reaction temperature was 60℃,pH=7,the aging time was 30 min,and the yield of manganese carbonate reached 91%.The prepared manganese carbonate accords with GB10503-89.
2011, 26(1)
:54-58.
doi: 10.3969/j.issn.1004-1478.2011.01.014
Abstract:
To save the problem of signal processing in electric locomotive's passing the phase division,the signal processor of system of electric locomotive's auto-passing the phase division on the base of GFX-3 system function was designed.Using Siemens S7-200 PLC as core control unit of signal processor in system of electric locomotive's auto-passing the phase division.The electro-circuit of signal collecting and settling is designed from such aspects as photo-coupling,anti-interference,circuit protection and matching software to perform function.The PLC program is designed from the needful functions such as self-checking,shielding,responding and exporting.And so signal processor achieves the function of adjusting the original signal of system of electric locomotive's auto-passing the phase division.The results of the test showed that the system's signal processing accuracy rate has a 1.2% increase compared with the GFX-3 system and so it may be used with practicability and value in the future.
To save the problem of signal processing in electric locomotive's passing the phase division,the signal processor of system of electric locomotive's auto-passing the phase division on the base of GFX-3 system function was designed.Using Siemens S7-200 PLC as core control unit of signal processor in system of electric locomotive's auto-passing the phase division.The electro-circuit of signal collecting and settling is designed from such aspects as photo-coupling,anti-interference,circuit protection and matching software to perform function.The PLC program is designed from the needful functions such as self-checking,shielding,responding and exporting.And so signal processor achieves the function of adjusting the original signal of system of electric locomotive's auto-passing the phase division.The results of the test showed that the system's signal processing accuracy rate has a 1.2% increase compared with the GFX-3 system and so it may be used with practicability and value in the future.
2011, 26(1)
:59-61,65.
doi: 10.3969/j.issn.1004-1478.2011.01.015
Abstract:
A design and realization method of missile aim simulation turntable control system based on STC12C5410AD with low power consumption and cabin A/D conversion module was introduced. Two-class computer control frame that PC works together with STC12C5410AD,and the PID control algorithm were adopted in the system. The experiments showed that the system had good acceleration and deceleration,positioning and start-stop control ability and achieved the technical request.
A design and realization method of missile aim simulation turntable control system based on STC12C5410AD with low power consumption and cabin A/D conversion module was introduced. Two-class computer control frame that PC works together with STC12C5410AD,and the PID control algorithm were adopted in the system. The experiments showed that the system had good acceleration and deceleration,positioning and start-stop control ability and achieved the technical request.
2011, 26(1)
:62-65.
doi: 10.3969/j.issn.1004-1478.2011.01.016
Abstract:
For the need to build an intelligent building life and fire water supply system,a design was proposed,which was composed of PLC,frequency converter and PID regulator and could achieve AC dual-constant-pressure,dual-frequency-convert close-loop speed governing control.According to water-out pressure and flow rate,the system can provide constant pressure alternating quantity water supply by controlling the speed of motor unit and switchover from variable frequency to power-frequency.Simulation of the above system in MCGS showed that the system has pressure stability,simple structure and good reliability.
For the need to build an intelligent building life and fire water supply system,a design was proposed,which was composed of PLC,frequency converter and PID regulator and could achieve AC dual-constant-pressure,dual-frequency-convert close-loop speed governing control.According to water-out pressure and flow rate,the system can provide constant pressure alternating quantity water supply by controlling the speed of motor unit and switchover from variable frequency to power-frequency.Simulation of the above system in MCGS showed that the system has pressure stability,simple structure and good reliability.
2011, 26(1)
:66-69.
doi: 10.3969/j.issn.1004-1478.2011.01.017
Abstract:
Centering round obstacle avoidance problem,an evadible system based on the ultrasonic sensor Sens600 was presented.The system scans rotatedly back and forth in horizontal plane ahead of the robot,then builds and updates a histogram world model with the to-and-fro range information after data processing.The safe area capture (SAC) method was applied to compute the most suitable direction among all candidates,and the steering of the robot was aligned with that direction.The simulation results show that this system has the effectiveness of obstacle avoidance.This system has the features like simple design,low cost,adjustable scanning density,and can provide information for object recognition and map building.
Centering round obstacle avoidance problem,an evadible system based on the ultrasonic sensor Sens600 was presented.The system scans rotatedly back and forth in horizontal plane ahead of the robot,then builds and updates a histogram world model with the to-and-fro range information after data processing.The safe area capture (SAC) method was applied to compute the most suitable direction among all candidates,and the steering of the robot was aligned with that direction.The simulation results show that this system has the effectiveness of obstacle avoidance.This system has the features like simple design,low cost,adjustable scanning density,and can provide information for object recognition and map building.
2011, 26(1)
:70-73.
doi: 10.3969/j.issn.1004-1478.2011.01.018
Abstract:
A new chaotic system was constructed by changing the sign of the quadratic terms of the Liu chaotic system.Existence of chaotic behaviors was proved by Lyapunov exponents,equlibrias and dissipation.Based on the stability criterion of linear system,switched function projective synchronization was achieved by appropriate linear seperation method.The feasibility and validity of this method were verified through numerical simulation.
A new chaotic system was constructed by changing the sign of the quadratic terms of the Liu chaotic system.Existence of chaotic behaviors was proved by Lyapunov exponents,equlibrias and dissipation.Based on the stability criterion of linear system,switched function projective synchronization was achieved by appropriate linear seperation method.The feasibility and validity of this method were verified through numerical simulation.
2011, 26(1)
:74-78.
doi: 10.3969/j.issn.1004-1478.2011.01.019
Abstract:
For the multi-sensor system's data fusion problem,data segmentation and registration by self-adaptive physical rehabilitation training system as an example was discussed.Cubic spline fitting method is used to solve the segmentation of time series data alignment problem.In order to solve the format unification,feature extraction,adaptive modeling,prediction and self-assessment are used in characteristic variables and the corresponding confidence probability of self-assessment statements,other files of information and non-analog processing parameters are changed by the same form of expression and then into unified form.The effectiveness of the method was proved with testing results.
For the multi-sensor system's data fusion problem,data segmentation and registration by self-adaptive physical rehabilitation training system as an example was discussed.Cubic spline fitting method is used to solve the segmentation of time series data alignment problem.In order to solve the format unification,feature extraction,adaptive modeling,prediction and self-assessment are used in characteristic variables and the corresponding confidence probability of self-assessment statements,other files of information and non-analog processing parameters are changed by the same form of expression and then into unified form.The effectiveness of the method was proved with testing results.
2011, 26(1)
:79-82.
doi: 10.3969/j.issn.1004-1478.2011.01.020
Abstract:
The network control system (NCS) simulation platform was constructed by using TrueTime Kernel and TrueTime Network.The network environment is built through interference node and network model.The simulation results showed that this simulation platform could simulate flexible network protocal of different physical layer,changeful transmission condition,influence of control system performance under different scheduling strategy.The control algorithm of NCS and network scheduling can be deeply studied on this simulation platform.
The network control system (NCS) simulation platform was constructed by using TrueTime Kernel and TrueTime Network.The network environment is built through interference node and network model.The simulation results showed that this simulation platform could simulate flexible network protocal of different physical layer,changeful transmission condition,influence of control system performance under different scheduling strategy.The control algorithm of NCS and network scheduling can be deeply studied on this simulation platform.
2011, 26(1)
:83-86.
doi: 10.3969/j.issn.1004-1478.2011.01.021
Abstract:
The induction motor model not considering iron loss is not accurate,because the iron loss will affect the rotor current and rotor flux when the motor is running.The dynamic mathematical model of asynchronous motor considering iron loss in the two-phase(α,β) stationary reference frame was deduced.Using the basic module and S-function of Matlab/Simulink,the simulation model of three phase asynchronous motor with iron loss was built.The simulations demonstrate that the model with iron more accurately reflect the situation of running motors.
The induction motor model not considering iron loss is not accurate,because the iron loss will affect the rotor current and rotor flux when the motor is running.The dynamic mathematical model of asynchronous motor considering iron loss in the two-phase(α,β) stationary reference frame was deduced.Using the basic module and S-function of Matlab/Simulink,the simulation model of three phase asynchronous motor with iron loss was built.The simulations demonstrate that the model with iron more accurately reflect the situation of running motors.
2011, 26(1)
:87-90.
doi: 10.3969/j.issn.1004-1478.2011.01.022
Abstract:
A new object placement algorithm C-SIEVE was put forward.It can not only locate data object effectively,but also solves problems of object copies placement by discrete data algorithm.Experiments indicated that this algorithm was effective.It can accomplish efficient and balanced object mapping according to the load of storage devices,but also have a good performance for object recovery once there are invalid storage nodes.
A new object placement algorithm C-SIEVE was put forward.It can not only locate data object effectively,but also solves problems of object copies placement by discrete data algorithm.Experiments indicated that this algorithm was effective.It can accomplish efficient and balanced object mapping according to the load of storage devices,but also have a good performance for object recovery once there are invalid storage nodes.
2011, 26(1)
:91-94.
doi: 10.3969/j.issn.1004-1478.2011.01.023
Abstract:
The X-model was improved by increasing the unit test criteria based on analysing features and limitations of the V-model,W-modle and X-model.The improved X-model was applied to a small educational management system.The results showed that the improved X-model could reduce the rate of the passed program fragments,prevent error from being magnified and reduce iteration workload which was brought by requirements change and turnover of developers.
The X-model was improved by increasing the unit test criteria based on analysing features and limitations of the V-model,W-modle and X-model.The improved X-model was applied to a small educational management system.The results showed that the improved X-model could reduce the rate of the passed program fragments,prevent error from being magnified and reduce iteration workload which was brought by requirements change and turnover of developers.
2011, 26(1)
:95-98.
doi: 10.3969/j.issn.1004-1478.2011.01.024
Abstract:
To solve the problem of cancellation of large amount of paging due to CCCH capacity limitation,then an optimization scheme for paging to packet service was proposed. By dynamically adjusting CCCH capacity,the PC business load was shared;by rebuilding TBF the community reselection was replied;through the change of GPRS boundary the CS business change was accommodated,at length,the load balanced of communication business was realized.The experiments of the impact of packet service on CCCH demonstrated that the scheme can solve the cancellation of large amount of paging and improve largely user awareness and network quality and hence,has highly feasibility.
To solve the problem of cancellation of large amount of paging due to CCCH capacity limitation,then an optimization scheme for paging to packet service was proposed. By dynamically adjusting CCCH capacity,the PC business load was shared;by rebuilding TBF the community reselection was replied;through the change of GPRS boundary the CS business change was accommodated,at length,the load balanced of communication business was realized.The experiments of the impact of packet service on CCCH demonstrated that the scheme can solve the cancellation of large amount of paging and improve largely user awareness and network quality and hence,has highly feasibility.
2011, 26(1)
:99-101,106.
doi: 10.3969/j.issn.1004-1478.2011.01.025
Abstract:
Based on the virtues of mobile agent in the target localization algorithm,a target localization algorithm in wireless sensor networks was proposed.All the sensor nodes that know target compete to get the mobile agent in order to track the location of targets.Competition rules are defined by the remaining value of the energy and the distance between the nodes and the target.Simulation results showed that this algorithm not only extend the life span of the network,but also take into account the accuracy of targeting.
Based on the virtues of mobile agent in the target localization algorithm,a target localization algorithm in wireless sensor networks was proposed.All the sensor nodes that know target compete to get the mobile agent in order to track the location of targets.Competition rules are defined by the remaining value of the energy and the distance between the nodes and the target.Simulation results showed that this algorithm not only extend the life span of the network,but also take into account the accuracy of targeting.
2011, 26(1)
:102-106.
doi: 10.3969/j.issn.1004-1478.2011.01.026
Abstract:
SOA-based data sharing and business platform design scheme was proposed,aiming at the low share of the enterprise excision-making information resources and failure to achieve business collaboration and data multiplexing.This platform,using the Web Service,enterprise Service bus,XML technology for the format of the data and documentation,establish unity of sharing and exchange interface.The interworking and information sharing of application-layer is realized in enterprise departments decision data.
SOA-based data sharing and business platform design scheme was proposed,aiming at the low share of the enterprise excision-making information resources and failure to achieve business collaboration and data multiplexing.This platform,using the Web Service,enterprise Service bus,XML technology for the format of the data and documentation,establish unity of sharing and exchange interface.The interworking and information sharing of application-layer is realized in enterprise departments decision data.
2011, 26(1)
:107-110.
doi: 10.3969/j.issn.1004-1478.2011.01.027
Abstract:
Aiming at robot charactertics of complex control for so many joints,a distributed motion control system based on CANopen network was designed and realized.Dedicated motion controller and digital incremental encoder were used to realize closed loop control to each joint.CANopen network was used to build a communication model among all joints,which strengthened recongfiguability and fault tolerance of the control system and supported real time multi-jointed linkage.Software architecture based on CMO/COM was used to achieve software control for each joint motor.Layer idea was used to design CANopen communication program for the whole system.Experimental results prove that hardware and software of this motion control system can work steadily and reliably.
Aiming at robot charactertics of complex control for so many joints,a distributed motion control system based on CANopen network was designed and realized.Dedicated motion controller and digital incremental encoder were used to realize closed loop control to each joint.CANopen network was used to build a communication model among all joints,which strengthened recongfiguability and fault tolerance of the control system and supported real time multi-jointed linkage.Software architecture based on CMO/COM was used to achieve software control for each joint motor.Layer idea was used to design CANopen communication program for the whole system.Experimental results prove that hardware and software of this motion control system can work steadily and reliably.
2011, 26(1)
:111-115.
doi: 10.3969/j.issn.1004-1478.2011.01.028
Abstract:
The factors and mechanism that affect the strength of plastic components were analyzed,then Pro/E MECHANICA Structure is used to simulate the actual stress environment so as to make an improvement to the structure of plastic products.With the methods above mentioned,the straight mobile phone as an example was taken.Firstly,the structural features and the assembly relations of the main components have been analyzed;next the possible deformation of the front cover and back cover of the mobile phone under static load during the process of assembly has been analyzed with Pro/E MECHANICA Structure model;then by adding are transition or corner brace an improvement and optimization have been made and the strength concentration of the structure is avoided.It was proved that the mechanical properties are up to standards.
The factors and mechanism that affect the strength of plastic components were analyzed,then Pro/E MECHANICA Structure is used to simulate the actual stress environment so as to make an improvement to the structure of plastic products.With the methods above mentioned,the straight mobile phone as an example was taken.Firstly,the structural features and the assembly relations of the main components have been analyzed;next the possible deformation of the front cover and back cover of the mobile phone under static load during the process of assembly has been analyzed with Pro/E MECHANICA Structure model;then by adding are transition or corner brace an improvement and optimization have been made and the strength concentration of the structure is avoided.It was proved that the mechanical properties are up to standards.
2011, 26(1)
:116-118.
doi: 10.3969/j.issn.1004-1478.2011.01.029
Abstract:
The concepts of generalized diagonal dominant matrix and α-diagonal dominant matrix were introduced,and give the new criteria conditions for a matrix to be a generalized strictly diagonal dominant matrix were given.Thus the corresponding results were generalized and improved.
The concepts of generalized diagonal dominant matrix and α-diagonal dominant matrix were introduced,and give the new criteria conditions for a matrix to be a generalized strictly diagonal dominant matrix were given.Thus the corresponding results were generalized and improved.
2011, 26(1)
:119-121.
doi: 10.3969/j.issn.1004-1478.2011.01.030
Abstract:
The stability problem of normal linear impulsive systems was investigated.Sufficient conditions are shown for globally exponential stabilization of normal linear impulsive systems and corresponding perturbed impulsive systems respectively.The previous results were popularized.
The stability problem of normal linear impulsive systems was investigated.Sufficient conditions are shown for globally exponential stabilization of normal linear impulsive systems and corresponding perturbed impulsive systems respectively.The previous results were popularized.
2011, 26(1)
:122-124.
doi: 10.3969/j.issn.1004-1478.2011.01.031
Abstract:
The construction of a nonlinear model is intended for the evaluation of students learning level through the application of the effective standard score in artificial neural network theory,aiming at achieving an overall evaluation of undergraduates' learning level,so as to stimulate students' learning initiative and exploit their potentialities in study.
The construction of a nonlinear model is intended for the evaluation of students learning level through the application of the effective standard score in artificial neural network theory,aiming at achieving an overall evaluation of undergraduates' learning level,so as to stimulate students' learning initiative and exploit their potentialities in study.
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
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Postal Code：450001
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