2013 Vol. 28, No. 2
Display Method: |
2013, 28(2)
:1-6.
doi: 10.3969/j.issn.2095-476X.2013.02.001
Abstract:
The temperature distribution of food packages of open-type horizontal display cabinet was investigated under the different wind speed, air temperature and humidity; at the same time,the radiation and mass transfer were considered.The computational results showed that the temperature distribution of food packages is low on the left and the bottom of the food and is high on the right and the surface of the food. When the blowing wind speed of the display cabinet increases, food temperature reduces, but cold consumption increases, so there is an optimal value of the wind speed. While the ambient temperature is increased by 2℃, the average temperature of food packages rise 0.1~0.3℃; humidity is increased by 20%, its average temperature rise 0.1~0.7℃.
The temperature distribution of food packages of open-type horizontal display cabinet was investigated under the different wind speed, air temperature and humidity; at the same time,the radiation and mass transfer were considered.The computational results showed that the temperature distribution of food packages is low on the left and the bottom of the food and is high on the right and the surface of the food. When the blowing wind speed of the display cabinet increases, food temperature reduces, but cold consumption increases, so there is an optimal value of the wind speed. While the ambient temperature is increased by 2℃, the average temperature of food packages rise 0.1~0.3℃; humidity is increased by 20%, its average temperature rise 0.1~0.7℃.
2013, 28(2)
:7-9.
doi: 10.3969/j.issn.2095-476X.2013.02.002
Abstract:
To observe the heat transfer effect on heat pipes,under the different gas velocity and different arrangement of heat pipes,the air side of heat pipes air preheater's temperature field was simulated using Fluent software;the results showed that the equilateral triangle arrangement is the best heat transfer of heat pipes arrangement.
To observe the heat transfer effect on heat pipes,under the different gas velocity and different arrangement of heat pipes,the air side of heat pipes air preheater's temperature field was simulated using Fluent software;the results showed that the equilateral triangle arrangement is the best heat transfer of heat pipes arrangement.
2013, 28(2)
:10-14.
doi: 10.3969/j.issn.2095-476X.2013.02.003
Abstract:
The low frequency cyclic loading tests on 7 composite joints specimens of cellular steel beam and welded compound-ring-hooped concrete column connected by extended end-plate with high-strength bolts were carried out to investigate the failure mode and seismic behavior of composite joints under simulated seism action, intends to put forward a reasonable bolts arrangement in composite joints under seism action.On the basis of test observation and analysis results, the conclusion can be drawn that with the same arrangement of bolts, the greater the bolt diameter is, the higher its seismic and shear capability would be; Among different types of arrangement for bolts, joints in which the bolts are arranged as close as possible to the beam flange (three rows and three columns) are the more reasonable ones among steel-concrete composite joints of extended end-plate connection.
The low frequency cyclic loading tests on 7 composite joints specimens of cellular steel beam and welded compound-ring-hooped concrete column connected by extended end-plate with high-strength bolts were carried out to investigate the failure mode and seismic behavior of composite joints under simulated seism action, intends to put forward a reasonable bolts arrangement in composite joints under seism action.On the basis of test observation and analysis results, the conclusion can be drawn that with the same arrangement of bolts, the greater the bolt diameter is, the higher its seismic and shear capability would be; Among different types of arrangement for bolts, joints in which the bolts are arranged as close as possible to the beam flange (three rows and three columns) are the more reasonable ones among steel-concrete composite joints of extended end-plate connection.
2013, 28(2)
:15-17,94.
doi: 10.3969/j.issn.2095-476X.2013.02.004
Abstract:
In order to study the axial compression behavior of square hollow section (SHS) brace-H section chord T-joint, a finite element model simulating the experiment on a SHS brace-H section chord T-joint was generated in order to obtain the failure mode and ultimate capacity using ABAQUS software. The results showed that the failure mode is brace local buckling and the ultimate capacity is 242 kN. The error of experiment compare with simulation is 10.5%. The brace was buckling since the square hollow section is a thin-walled component relative to H section chord. The finite element model is quite similar to the experimental one, and the wall thickness of brace should be thicken to avoid buckling.
In order to study the axial compression behavior of square hollow section (SHS) brace-H section chord T-joint, a finite element model simulating the experiment on a SHS brace-H section chord T-joint was generated in order to obtain the failure mode and ultimate capacity using ABAQUS software. The results showed that the failure mode is brace local buckling and the ultimate capacity is 242 kN. The error of experiment compare with simulation is 10.5%. The brace was buckling since the square hollow section is a thin-walled component relative to H section chord. The finite element model is quite similar to the experimental one, and the wall thickness of brace should be thicken to avoid buckling.
2013, 28(2)
:18-21.
doi: 10.3969/j.issn.2095-476X.2013.02.005
Abstract:
A new adhesion method for multiped climbing robot was designed to enhance the adhesion force and reliable adhesion by introducing ERG (electro-rheological gel) instead of the ordinary insulating gel, to fill the insulating layer of adhesion array and improve adsorption performance. The climbing experiments showed that the robots can adsorb the surface of glass,wood and concrete,the largest carrying capacity of static adsorption in surface of glass is 1.0 kg.
A new adhesion method for multiped climbing robot was designed to enhance the adhesion force and reliable adhesion by introducing ERG (electro-rheological gel) instead of the ordinary insulating gel, to fill the insulating layer of adhesion array and improve adsorption performance. The climbing experiments showed that the robots can adsorb the surface of glass,wood and concrete,the largest carrying capacity of static adsorption in surface of glass is 1.0 kg.
2013, 28(2)
:22-25.
doi: 10.3969/j.issn.2095-476X.2013.02.006
Abstract:
A moving object tracking algorithm based on the Mean-Shift algorithm was proposed for the accurately tracking of moving target under complex environments. This algorithm obtained the target model through the frame difference method;then through Kalman filter to reduce the iteration times of Mean-Shift algorithm and solve occlusion;lastly through adjusting the kernel function bandwidth to change the size of tracking window in order to access the complete information of moving target. Experiment results showed that the algorithm can track the moving target stably and accurately under complex environment and robustness to occlusion without the prior information.
A moving object tracking algorithm based on the Mean-Shift algorithm was proposed for the accurately tracking of moving target under complex environments. This algorithm obtained the target model through the frame difference method;then through Kalman filter to reduce the iteration times of Mean-Shift algorithm and solve occlusion;lastly through adjusting the kernel function bandwidth to change the size of tracking window in order to access the complete information of moving target. Experiment results showed that the algorithm can track the moving target stably and accurately under complex environment and robustness to occlusion without the prior information.
2013, 28(2)
:26-30.
doi: 10.3969/j.issn.2095-476X.2013.02.007
Abstract:
With a wind power station as the research object,a computing method of reactive power compensation capacity was presented based on fuzzy neural network for wind power,which takes the active power of the wind power station as input, calculates the reactive power compensation capacity through power flow calculation to stabilize the bus voltage for wind power station. The calculation results showed that this method could accurately calculate the reactive power compensation capacity for wind power station, simplified calculation process of wind power reactive power compensation capacity.
With a wind power station as the research object,a computing method of reactive power compensation capacity was presented based on fuzzy neural network for wind power,which takes the active power of the wind power station as input, calculates the reactive power compensation capacity through power flow calculation to stabilize the bus voltage for wind power station. The calculation results showed that this method could accurately calculate the reactive power compensation capacity for wind power station, simplified calculation process of wind power reactive power compensation capacity.
2013, 28(2)
:31-35.
doi: 10.3969/j.issn.2095-476X.2013.02.008
Abstract:
The textile industry is a typical manufacturing industry of assembly line, its control is given priority to with switch quantity, and its characteristics are more procreative machines and wide distribution area. The PROFIBUS field bus technology was presented in this textile industry informatization network architecture,in order to meet their requirements of high intelligent information systems and strong communications networking capabilities. The scheme of network architecture planning was as follows:the data acquisition of textile production process and the processing systems backbone network to PROFIBUS, to the top connected to the enterprise information via industrial Ethernet, and to the bottom integrated all the field level device control systems, the process of PROFIBUS networking should be noted that the use of repeaters, network termination resistors and independent power supply. In the process of networking a variety of communication protocols conversion method was as follows:the machines that own with PLC controller are able to be added corresponding DP extension module, corresponding DP extension modules are articulated to their controlers; for the equipments with RS232/RS485 universal serial interface, the gateway device can be used to realize the serial port and PROFIBUS communication; the devices with RJ45 Ethernet interface, can be directly through the industry switches connected to Ethernet, or through the corresponding Ethernet module connected to field bus; for machines with specialized independent control system, OPC technology was used to a-chieve system integration.
The textile industry is a typical manufacturing industry of assembly line, its control is given priority to with switch quantity, and its characteristics are more procreative machines and wide distribution area. The PROFIBUS field bus technology was presented in this textile industry informatization network architecture,in order to meet their requirements of high intelligent information systems and strong communications networking capabilities. The scheme of network architecture planning was as follows:the data acquisition of textile production process and the processing systems backbone network to PROFIBUS, to the top connected to the enterprise information via industrial Ethernet, and to the bottom integrated all the field level device control systems, the process of PROFIBUS networking should be noted that the use of repeaters, network termination resistors and independent power supply. In the process of networking a variety of communication protocols conversion method was as follows:the machines that own with PLC controller are able to be added corresponding DP extension module, corresponding DP extension modules are articulated to their controlers; for the equipments with RS232/RS485 universal serial interface, the gateway device can be used to realize the serial port and PROFIBUS communication; the devices with RJ45 Ethernet interface, can be directly through the industry switches connected to Ethernet, or through the corresponding Ethernet module connected to field bus; for machines with specialized independent control system, OPC technology was used to a-chieve system integration.
2013, 28(2)
:36-39.
doi: 10.3969/j.issn.2095-476X.2013.02.009
Abstract:
The correlation dimension method was introduced into the causes of the AC contactor fault noise analysis. The mutual information and Cao method decided two important parameters of the phase space reconstruction-delay time and embedded dimension. G-P algorithm separately calculated AC contactor correlation dimension with short circuit ring fracture, wear,foreign matter invasion, stronger reset spring and compared with under normal operation to judge the causes of different AC contactor fault noise. The experimental results showed that correlation dimensions are different in the different fault state. The correlation dimension of AC contactor fault noise can be used as criterion to analyses the causes of running noise.
The correlation dimension method was introduced into the causes of the AC contactor fault noise analysis. The mutual information and Cao method decided two important parameters of the phase space reconstruction-delay time and embedded dimension. G-P algorithm separately calculated AC contactor correlation dimension with short circuit ring fracture, wear,foreign matter invasion, stronger reset spring and compared with under normal operation to judge the causes of different AC contactor fault noise. The experimental results showed that correlation dimensions are different in the different fault state. The correlation dimension of AC contactor fault noise can be used as criterion to analyses the causes of running noise.
2013, 28(2)
:40-43.
doi: 10.3969/j.issn.2095-476X.2013.02.010
Abstract:
Spherical gold nanoparticles (GNPs) of approximately 20 nm were synthesized using the hydroquinone reduction HAuCl4 method and modified GNPs using the alkyl mercaptan with different chains (ethyl mercaptan,butyl mercaptan,1-hexyl mercaptan, n-octyl mercaptan, dodecyl mercaptan and octadecyl mercaptan). The particles have been characterised by UV-vis spectrophotometer, high resolution transmission electron microscopy (TEM) and Zeta potential analyzer. The results showed that with the increase of alkyl length,the GNPs become stability under the same concentration conditions.
Spherical gold nanoparticles (GNPs) of approximately 20 nm were synthesized using the hydroquinone reduction HAuCl4 method and modified GNPs using the alkyl mercaptan with different chains (ethyl mercaptan,butyl mercaptan,1-hexyl mercaptan, n-octyl mercaptan, dodecyl mercaptan and octadecyl mercaptan). The particles have been characterised by UV-vis spectrophotometer, high resolution transmission electron microscopy (TEM) and Zeta potential analyzer. The results showed that with the increase of alkyl length,the GNPs become stability under the same concentration conditions.
2013, 28(2)
:44-48.
doi: 10.3969/j.issn.2095-476X.2013.02.011
Abstract:
Cuprous oxide/Graphene (Cu2O/G) nano composites was prepared by the hydrothermal method and assemblied simulation cell with the Cu2O/G Nanocomposite material as negative electrode.The structure and morphology of Cu2O/G were tested by the X-ray diffraction and scanning electronic microscope, respectively.Moreover,the charge and discharge performance were studied by the charge and discharge tester.After Cu2O was composite with graphene,it original cubic structure was kept.The morphology of the Cu2O,however,was changed from globosity to cubcity with the variation of preparation conditions.The globular Cu2O grows well-proportioned on the surface of graphene in the composites of Cu2O/G.The results demonstrated that the graphene could enhance the charge and discharge performance of Cu2O nanomaterial.
Cuprous oxide/Graphene (Cu2O/G) nano composites was prepared by the hydrothermal method and assemblied simulation cell with the Cu2O/G Nanocomposite material as negative electrode.The structure and morphology of Cu2O/G were tested by the X-ray diffraction and scanning electronic microscope, respectively.Moreover,the charge and discharge performance were studied by the charge and discharge tester.After Cu2O was composite with graphene,it original cubic structure was kept.The morphology of the Cu2O,however,was changed from globosity to cubcity with the variation of preparation conditions.The globular Cu2O grows well-proportioned on the surface of graphene in the composites of Cu2O/G.The results demonstrated that the graphene could enhance the charge and discharge performance of Cu2O nanomaterial.
2013, 28(2)
:49-53.
doi: 10.3969/j.issn.2095-476X.2013.02.012
Abstract:
Using high resolution mass spectrometry (HRMS) to analyze the brewing process of Huai chrysanthemum,27 typical components in drinking process were directly qualified with accurate molecular weight,and the high resolution mass spectrometric (MS) fingerprints of chrysanthemum tea process were obtained combined with the mass spectrometric response strength of the components. The fingerprints were processed by dependent component analysis (DCA),and 3 groups of dependent components (DCs) that can used to characterize the characteristics of the typical components in the drink chrysanthemum bubble and the brewing process. Research results showed that the 3 groups of DCs are corresponding to volatile oil, amino acids,and flavonoids as the main components of the Huai chrysanthemum,there are great differences among the response MS values of of different components. The relative concentration of DCs obviously de-creased during the first 2 times of the brewing process; while after 5 times brewing,the variation of DCs are negligible and there is no drinking value. HRMS-DCA provides a new way to resolve HRMS fingerprints of chrysanthemum brewing process.
Using high resolution mass spectrometry (HRMS) to analyze the brewing process of Huai chrysanthemum,27 typical components in drinking process were directly qualified with accurate molecular weight,and the high resolution mass spectrometric (MS) fingerprints of chrysanthemum tea process were obtained combined with the mass spectrometric response strength of the components. The fingerprints were processed by dependent component analysis (DCA),and 3 groups of dependent components (DCs) that can used to characterize the characteristics of the typical components in the drink chrysanthemum bubble and the brewing process. Research results showed that the 3 groups of DCs are corresponding to volatile oil, amino acids,and flavonoids as the main components of the Huai chrysanthemum,there are great differences among the response MS values of of different components. The relative concentration of DCs obviously de-creased during the first 2 times of the brewing process; while after 5 times brewing,the variation of DCs are negligible and there is no drinking value. HRMS-DCA provides a new way to resolve HRMS fingerprints of chrysanthemum brewing process.
2013, 28(2)
:54-58,63.
doi: 10.3969/j.issn.2095-476X.2013.02.013
Abstract:
By comparing grinding method, washing method, cleavage and precipitation method, a method was gotten suitable for farmland fungi DNA extraction. The results showed that the quality of soil microorganism DNA is of the best which is obtained by grinding with quartz sand, washing with TENP and PBS, lysing with SDS in high-salt buffer and precipitating with isopropanol and so on. The pathogenic fungal DNA can be directly extracted from soil by using the method, which is particularly suitable for the soil pathogenic fungal extraction. The DNA obtained can be directly used for restriction enzyme digestion and PCR amplification. The method is efficient, inexpensive, easy to operate, which is of important value for the soil pathogens ecological research.
By comparing grinding method, washing method, cleavage and precipitation method, a method was gotten suitable for farmland fungi DNA extraction. The results showed that the quality of soil microorganism DNA is of the best which is obtained by grinding with quartz sand, washing with TENP and PBS, lysing with SDS in high-salt buffer and precipitating with isopropanol and so on. The pathogenic fungal DNA can be directly extracted from soil by using the method, which is particularly suitable for the soil pathogenic fungal extraction. The DNA obtained can be directly used for restriction enzyme digestion and PCR amplification. The method is efficient, inexpensive, easy to operate, which is of important value for the soil pathogens ecological research.
2013, 28(2)
:59-63.
doi: 10.3969/j.issn.2095-476X.2013.02.014
Abstract:
The experimental method which improves the CTAB for extracting the genomic DNA in flue-cured tobacco was presented in order to stabilize the extraction of the genomic DNA. Each of the four influencing factors in the CATB, namely, the usage amount of precipitate buffer solution, pyrolysis time,number of processing the Tris phenol and the processing time for RNase were optimized respectively. The results showed that after using CATB precipitate buffer solution with the volume 1.5 times larger than that of the DNA solution with pyrolysis time for 40 min, one-time extraction of the Tris phenol and 10 min processing the Rnase (10 mg/mL,1 μL), a clear main band of the genomic DNA in the flue-cured tobacco could be obtained. The extracted genomic DNA OD260/OD280 was between 1.7 and 1.9. OD260/OD230 was greater than 2.0. In this case, with 35 ng genomic DNA, clear RAPD and SCAR maps could be obtained. The extracted genomic DNA can be applied to the molecular biological experiments.
The experimental method which improves the CTAB for extracting the genomic DNA in flue-cured tobacco was presented in order to stabilize the extraction of the genomic DNA. Each of the four influencing factors in the CATB, namely, the usage amount of precipitate buffer solution, pyrolysis time,number of processing the Tris phenol and the processing time for RNase were optimized respectively. The results showed that after using CATB precipitate buffer solution with the volume 1.5 times larger than that of the DNA solution with pyrolysis time for 40 min, one-time extraction of the Tris phenol and 10 min processing the Rnase (10 mg/mL,1 μL), a clear main band of the genomic DNA in the flue-cured tobacco could be obtained. The extracted genomic DNA OD260/OD280 was between 1.7 and 1.9. OD260/OD230 was greater than 2.0. In this case, with 35 ng genomic DNA, clear RAPD and SCAR maps could be obtained. The extracted genomic DNA can be applied to the molecular biological experiments.
2013, 28(2)
:64-68.
doi: 10.3969/j.issn.2095-476X.2013.02.015
Abstract:
The synthetic technology of 3-hydroxy-β-damascone and its pyrolysis analysis were performed.Firstly ethyl 2,6,6-trimethyl-4-oxo-2cyclohexene-1-carboxylate was obtained by reactions of Michael addition and Robinson cyclation with mesityl oxide and ethyl acetoacetate as starting materials,then it was ketalized with ethylene glycol,and was hydrolated and reduced by sodium borohydride to afford ethyl 2,6,6-trimethyl4-hydroxyl-cyclohexene-lcarboxylate,finally the obtained compound was coupled with allyllithium to give the title compound 3-hydroxyβ-damascone.The structure of 3-hydroxyβ-damascone was charactered by GC-MS,IR,LC-ESI-MS,1H NMR,and 13C NMR.The pyrolysis results of 3-hydroxy-β-damascone showed that it could hardly be pyrolyzed at 300℃,but could be pyrolyzed at 600℃,750℃,900℃ to produce β-damascenone,isophorone,etc,which are important flavoring comopositions in tobacco.
The synthetic technology of 3-hydroxy-β-damascone and its pyrolysis analysis were performed.Firstly ethyl 2,6,6-trimethyl-4-oxo-2cyclohexene-1-carboxylate was obtained by reactions of Michael addition and Robinson cyclation with mesityl oxide and ethyl acetoacetate as starting materials,then it was ketalized with ethylene glycol,and was hydrolated and reduced by sodium borohydride to afford ethyl 2,6,6-trimethyl4-hydroxyl-cyclohexene-lcarboxylate,finally the obtained compound was coupled with allyllithium to give the title compound 3-hydroxyβ-damascone.The structure of 3-hydroxyβ-damascone was charactered by GC-MS,IR,LC-ESI-MS,1H NMR,and 13C NMR.The pyrolysis results of 3-hydroxy-β-damascone showed that it could hardly be pyrolyzed at 300℃,but could be pyrolyzed at 600℃,750℃,900℃ to produce β-damascenone,isophorone,etc,which are important flavoring comopositions in tobacco.
2013, 28(2)
:69-73.
doi: 10.3969/j.issn.2095-476X.2013.02.016
Abstract:
In order to study the effect of pyrolysis behavior of tobacco leaf on the component of cigarette smoke,the pyrolysates of tobacco leaf were investigated at three temperature levels of 300℃,600℃ and 900℃ at He atmosphere, respectively, the pyrolysates were directly introduced into Py-GC/MS, qualitative analysis was studied by mass spectrometry, and quantitative analysis was studied by area normalization. The results showed that there are 45,110 and 124 kinds of pyrolysates were identified at temperature different temperatures of 300℃, 600℃ and 900℃, the pyrolysis temperature has a significant influence on the type and content, the aroma constituents include ketones, alcohols, aldehydes, esters and lactones, acids, and N-heterocyclic carbenes. The relative content of total flavor components is the largest at 600℃.
In order to study the effect of pyrolysis behavior of tobacco leaf on the component of cigarette smoke,the pyrolysates of tobacco leaf were investigated at three temperature levels of 300℃,600℃ and 900℃ at He atmosphere, respectively, the pyrolysates were directly introduced into Py-GC/MS, qualitative analysis was studied by mass spectrometry, and quantitative analysis was studied by area normalization. The results showed that there are 45,110 and 124 kinds of pyrolysates were identified at temperature different temperatures of 300℃, 600℃ and 900℃, the pyrolysis temperature has a significant influence on the type and content, the aroma constituents include ketones, alcohols, aldehydes, esters and lactones, acids, and N-heterocyclic carbenes. The relative content of total flavor components is the largest at 600℃.
2013, 28(2)
:74-77.
doi: 10.3969/j.issn.2095-476X.2013.02.017
Abstract:
In view of the probelm of the low penetration in present parking system caused by the high cost, the intelligent parking system was designed. System uses ZigBee wireless communication technology and sensor network technology,provides a low-cost and efficient monitoring management function. The system can realize the function of parking space monitoring and parking guidance,and the intelligent solution for urban parking problems is put forward,it can be provideld a good environment of parking for citizens.
In view of the probelm of the low penetration in present parking system caused by the high cost, the intelligent parking system was designed. System uses ZigBee wireless communication technology and sensor network technology,provides a low-cost and efficient monitoring management function. The system can realize the function of parking space monitoring and parking guidance,and the intelligent solution for urban parking problems is put forward,it can be provideld a good environment of parking for citizens.
2013, 28(2)
:78-82,86.
doi: 10.3969/j.issn.2095-476X.2013.02.018
Abstract:
The complication of emergency plan in public social field make plans hard to manage. And it also make decision maker hard to decide and integrate information. An intelligent match scheme of emergency plan based on Chinese keywords extraction was introduced. Based on the solving structure storage of emergency plan using framework structure theory,the participle of storage emergency plan was processed, the frequency, part of speech, position of framework were selected as keywords' characteristic values, least error of mean square method was used for training keywords weight regulatory factors to realize intelligent match of emergency plans more exact and efficient. The experimental results showed that the presented method is more promising in intelligent match method of emergency plan than tradition FIFA method.
The complication of emergency plan in public social field make plans hard to manage. And it also make decision maker hard to decide and integrate information. An intelligent match scheme of emergency plan based on Chinese keywords extraction was introduced. Based on the solving structure storage of emergency plan using framework structure theory,the participle of storage emergency plan was processed, the frequency, part of speech, position of framework were selected as keywords' characteristic values, least error of mean square method was used for training keywords weight regulatory factors to realize intelligent match of emergency plans more exact and efficient. The experimental results showed that the presented method is more promising in intelligent match method of emergency plan than tradition FIFA method.
2013, 28(2)
:83-86.
doi: 10.3969/j.issn.2095-476X.2013.02.019
Abstract:
A kind of flow classification method for suitable to online real-time classification and avoid too much interference with human factors was put forward, the scheme applies DPI technology to ident the information flow business type in early stage,it works as guidance and reference for late clustering algorithm, based on the thought of OPTICS clustering algorithm,the information flow of clustering was completed using the number of data points to measure consistency,the services can be provided for targeted user.
A kind of flow classification method for suitable to online real-time classification and avoid too much interference with human factors was put forward, the scheme applies DPI technology to ident the information flow business type in early stage,it works as guidance and reference for late clustering algorithm, based on the thought of OPTICS clustering algorithm,the information flow of clustering was completed using the number of data points to measure consistency,the services can be provided for targeted user.
2013, 28(2)
:87-90.
doi: 10.3969/j.issn.2095-476X.2013.02.020
Abstract:
The Manual describes the routing protocol of JXTA, but doesn't introduce the key implement about passing through Fire Wall and NAT, which has trouble passing through them in JXTA P2P development and distribution. Aiming at this problems faced by P2P routing, how to use JXTA Relay technology across the network barriers,routing table maintenance and other issues were analyzed and studied, and the example of search for effective routing using JXTA ERP protocol was given.
The Manual describes the routing protocol of JXTA, but doesn't introduce the key implement about passing through Fire Wall and NAT, which has trouble passing through them in JXTA P2P development and distribution. Aiming at this problems faced by P2P routing, how to use JXTA Relay technology across the network barriers,routing table maintenance and other issues were analyzed and studied, and the example of search for effective routing using JXTA ERP protocol was given.
2013, 28(2)
:91-94.
doi: 10.3969/j.issn.2095-476X.2013.02.021
Abstract:
The vehicle-logo recognition method was built based on modified invariant moments. Template matching was applied to the rough location of vehicle-log, then,edge detection wae used to locate vehiclelogo precisely,the modified invariant moments eigenvalue was calculated for the recognition vehicle-logo,at last the vehicle-logo recognition was achieved by invariant moment minimum distance. The approach can adapt to complete object location and recognition,it can be unacted on the image size and deformation. The experimental results showed that compared with Hu invariant moments, the method based on modified invariant moments has higher accuracy of recognition,which is conducive to the vehicle-logo recognition.
The vehicle-logo recognition method was built based on modified invariant moments. Template matching was applied to the rough location of vehicle-log, then,edge detection wae used to locate vehiclelogo precisely,the modified invariant moments eigenvalue was calculated for the recognition vehicle-logo,at last the vehicle-logo recognition was achieved by invariant moment minimum distance. The approach can adapt to complete object location and recognition,it can be unacted on the image size and deformation. The experimental results showed that compared with Hu invariant moments, the method based on modified invariant moments has higher accuracy of recognition,which is conducive to the vehicle-logo recognition.
2013, 28(2)
:95-99.
doi: 10.3969/j.issn.2095-476X.2013.02.022
Abstract:
A new training effect evaluation system of recruiting police based on Web was designed and implemented. The system uses B/S three-layer architecture and MySQL database technology which are all popular at present. Through the establishment of multiple-level indicators, it could achieve reasonable information evaluation for training effect. It provides measurement method for comprehensive ability of police trained by public security organs.
A new training effect evaluation system of recruiting police based on Web was designed and implemented. The system uses B/S three-layer architecture and MySQL database technology which are all popular at present. Through the establishment of multiple-level indicators, it could achieve reasonable information evaluation for training effect. It provides measurement method for comprehensive ability of police trained by public security organs.
2013, 28(2)
:100-102.
doi: 10.3969/j.issn.2095-476X.2013.02.023
Abstract:
the validity and integrality of the document were verified using ID-based digital signature and encryption during the transmision of E-books and the digital documents, and the application of ID-based signature scheme in digital library was proposed. The results showed that the cost of the management and maintain of certificates for public key users can be omitted duiring the transmission of E-books and the digital documents. During sending a digital document, it does not to transmit the sender's public key certificate, and the receiver of the digital document does not to verify the validity of the public key certificate, so it saves the width and reduces many computation, which provides more convenience for the users of digital library.
the validity and integrality of the document were verified using ID-based digital signature and encryption during the transmision of E-books and the digital documents, and the application of ID-based signature scheme in digital library was proposed. The results showed that the cost of the management and maintain of certificates for public key users can be omitted duiring the transmission of E-books and the digital documents. During sending a digital document, it does not to transmit the sender's public key certificate, and the receiver of the digital document does not to verify the validity of the public key certificate, so it saves the width and reduces many computation, which provides more convenience for the users of digital library.
2013, 28(2)
:103-105.
doi: 10.3969/j.issn.2095-476X.2013.02.024
Abstract:
Output-coupling sliding mode chaos synchronization control of a class of discrete complex networks was studied. The effectiveness of the method was analyzed based on Lyapunov stability theory. The conclusion was arrived that complex networks systems is chaos synchronization choosing appropriate control laws. The example proved the effective of this approach.
Output-coupling sliding mode chaos synchronization control of a class of discrete complex networks was studied. The effectiveness of the method was analyzed based on Lyapunov stability theory. The conclusion was arrived that complex networks systems is chaos synchronization choosing appropriate control laws. The example proved the effective of this approach.
2013, 28(2)
:106-108.
doi: 10.3969/j.issn.2095-476X.2013.02.025
Abstract:
Using the concepts of conjugate, transposed and Hermite matrix, a set of matrix which can be diagonalized is found and their diagonal forms and other conclusion are obtained.
Using the concepts of conjugate, transposed and Hermite matrix, a set of matrix which can be diagonalized is found and their diagonal forms and other conclusion are obtained.
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
